Because this project is maintained both in the OpenBSD tree using CVS and in Git, it can be confusing following all of the changes. Most of the libssl and libcrypto source code is is here in OpenBSD CVS: https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libssl/ Some of the libcrypto and OS-compatibility files for entropy and random number generation are here: https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libcrypto/ A simplified TLS wrapper library is here: https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libtls/ The LibreSSL Portable project copies these portions of the OpenBSD tree, along with relevant portions of the C library, to a Git repository. This makes it easier to follow all of the relevant changes to the upstream project in a single place: https://github.com/libressl/openbsd The portable bits of the project are largely maintained out-of-tree, and their history is also available from Git. https://github.com/libressl/portable LibreSSL Portable Release Notes: 4.0.0 - In development * Portable changes * Internal improvements - Cleaned up parts of the conf directory. Simplified some logic, fixed memory leaks. - Simplified X509_check_trust() internals to be somewhat readable. - Removed last internal uses of gmtime() and timegm() and replaced them with BoringSSL's posix time conversion API. - Removed unnecessary stat calls in by_dir. - Split parsing and processing of TLS extensions to ensure that extension callbacks are called in a predefined order. - Cleaned up the MD4 and MD5 implementations. * Documentation improvements - Removed documentation of no longer existing API. * Testing and proactive security - Switched the remaining tests to new certs. * Compatibility changes - Removed workaround for F5 middle boxes. * Bug fixes - Fixed signed integer overflow in bnrand(). 3.9.0 - Development release * Portable changes - libcrypto no longer exports compat symbols in cmake builds. - Most compatibility symbols are prefixed with libressl_ to avoid symbol clashes in static links. - Fixed various warnings on Windows. - Removed assert pop-ups with Windows debug builds. - Fixed crashes and hangs in Windows ARM64 builds. - Improved control-flow enforcement (CET) support. * Internal improvements - Converted uses of OBJ_bsearch_() to standard bsearch(). - Greatly simplified by_file_ctrl(). - Simplified and cleaned up the OBJ_ API. - Cleaned up the EVP_Cipher{Init,Update,Final}() implementations. - Removed unused function pointers from X.509 stores and contexts. - A lot of cleanup and reorganization in EVP. - Removed all remaining ENGINE tentacles. - Simplified internals of X509_TRUST handling. - Made deletion from a lhash doall callback safe. - Rewrote BIO_dump*(3) internals to be less bad. * Documentation improvements - ENGINE documentation was updated to reflect reality. - Made EVP API documentation more accurate and less incoherent. - Call out some shortcomings of the EC_KEY_set_* API explicitly. * Testing and proactive security - Bug fixes and simplifications in the Wycheproof tests. * Compatibility changes - Added ChaCha20 and chacha20 aliases for ChaCha. - SSL_library_init() now has the same effect as OPENSSL_init_ssl(). - EVP_add_{cipher,digest}() were removed. From the OBJ_NAME API, only OBJ_NAME_do_all*() remain. In particular, it is no longer possible to add aliases for ciphers and digests. - The thread unsafe global tables are no longer supported. It is no longer possible to add aliases for ciphers and digests, custom ASN.1 strings table entries, ASN.1 methods, PKEY methods, digest methods, CRL methods, purpose and trust identifiers, or X.509 extensions. - Removed the _cb() and _fp() versions of BIO_dump{,_indent}(). - BIO_set() was removed. - BIO_{sn,v,vsn}printf() were removed. - Turn the long dysfunctional openssl(1) s_client -pause into a noop. - openssl(1) x509 now supports -new -force_pubkey, -multivalue-rdn, -set_issuer, -set_subject, and -utf8. - Support ECDSA with SHA-3 signature algorithms. - Support HMAC with truncated SHA-2 and SHA-3 as PBE PRF. - GOST and STREEBOG support was removed. - CRYPTO_THREADID, _LHASH, _STACK, X509_PURPOSE are now opaque, X509_CERT_AUX and X509_TRUST were removed from the public API. - ASN1_STRING_TABLE_get() and X509_PURPOSE_get0*() now return const pointers. - EVP_{CIPHER,MD}_CTX_init()'s signatures and semantics now match OpenSSL's behavior. - sk_find_ex() and OBJ_bsearch_() were removed. - CRYPTO_malloc() was fixed to use size_t argument. CRYPTO_malloc() and CRYPTO_free() now accept file and line arguments. - A lot of decrepit CRYPTO memory API was removed. * Bug fixes - Fixed aliasing issues in BN_mod_exp_simple() and BN_mod_exp_recp(). - Fixed numerous misuses of X509_ALGOR_set0() resulting in leaks and potentially incorrect encodings. - Fixed potential double free in X509v3_asid_add_id_or_range(). - Stopped using ASN1_time_parse() outside of libcrypto. - Prepared OPENSSL_gmtime() and OPENSSL_timegm() as public API wrappers of internal functions compatible with BoringSSL API. - Removed print_bin() to avoid overwriting the stack with 5 bytes of ' ' when ECPK parameters are printed with large indentation. - Avoid a NULL dereference after memory allocation failure during TLS version downgrade. - Fixed various bugs in CMAC internals. - Fixed 4-byte overreads in GHASH assembly on amd64 and i386. - Fixed various NULL dereferences in PKCS #12 code due to mishandling of OPTIONAL content in PKCS #7 ContentInfo. - Aligned SSL_shutdown() behavior in TLSv1.3 with the legacy stack. - Fixed the new X.509 verifier to find trust anchors in the trusted stack. 3.8.3 - Stable release * Portable changes - Removed assert pop-ups with Windows debug builds. - Fixed crashes and hangs in Windows ARM64 builds. - Improved control-flow enforcement (CET) support. 3.8.2 - Stable release * Portable changes - Fixed processor detection for CMake targets. Thanks to @jiegec from github. - Enabled building oscpcheck with MSVC. Thanks to @FtZPetruska from github. - Improve CMake package detection and installation. Thanks to @mark-groundctl from github. - Fixed assembly optimizations on x64 Windows targets. - Allow disabling warnings about WINCRYPT overrides. - Use system arc4random on FreeBSD 12 and newer. * Documentation improvements - Documented the RFC 3779 API. * Compatibility changes - Restrict the RFC 3779 code to IPv4 and IPv6. It was not written to be able to deal with anything else. - Fixed EVP_CIPHER_CTX_iv_length() to return what was set with EVP_CTRL_AEAD_SET_IVLEN or one of its aliases. * Bug fixes - Fixed EVP_PKEY_get{0,1}_RSA for RSA-PSS. - Plug a potential memory leak in ASN1_TIME_normalize(). - Avoid memory leak in EVP_CipherInit(). - Redirect EVP_PKEY_get1_* through their get0 siblings. - Fixed a use of uninitialized in i2r_IPAddrBlocks(). - Rewrote CMS_SignerInfo_{sign,verify}(). - Further cleanup and refactoring in the EC code. - Allow IP addresses to be specified in a URI. - Fixed a copy-paste error in ASN1_TIME_compare() that could lead to two UTCTimes or two GeneralizedTimes incorrectly being compared as equal. 3.8.1 - Development release * Portable changes - Applications bundled as part of the LibreSSL package internally, nc(1) and openssl(1), now are linked statically if static libraries are built. - Internal compatibility function symbols are no longer exported from libcrypto. Instead, the libcompat library is linked to libcrypto, libssl, and libtls separately. This increases size a little, but ensures that the libraries are not exporting symbols to programs unintentionally. - Selective removal of CET implementation on platforms where it is not supported (macOS). - Integrated four more tests. - Added Windows ARM64 architecture to tested platforms. - Removed Solaris 10 support, fixed Solaris 11. - libtls no longer links statically to libcrypto / libssl unless '--enable-libtls-only' is specified at configure time. - Improved Windows compatibility library, namely handling of files vs sockets, correcting an exception when operating on a closed socket. - CMake builds no longer hardcode '-O2' into the compiler flags, instead using flags from the CMake build type instead. - Set the CMake default build type to 'Release'. This can be overridden during configuration. - Fixed broken ASM support with MinGW builds. * Internal improvements - Fixed alignment handling in SHA-512. - Moved the verified_chain to the correct internal struct. - Improved checks for commonName in libtls. - Fixed error check for X509_get_ext_d2i() failure in libtls. - Improved BIGNUM internals and performance. - Significantly improved Montgomery multiplication performance. - Initial cleanup passes for SHA-256 internals. - Converted more libcrypto internals API using CBB and CBS. - Removed code guarded by #ifdef ZLIB. - Changed ASN1_item_sign_ctx() and ASN1_item_verify() to work with Ed25519 and fixed a few bugs in there. - Fixed various issues with EVP_PKEY_CTX_{new,dup}(). - Improved X.509 certificate version checks. - Cleaned up handling of elliptic curve cofactors. - Made BN_num_bits() independent of bn->top. - Rewrote and simplified bn_sqr(). - Removed EC_GROUP precomp machinery. - Ensure no X.509v3 extensions appear more than once in certificates. - Cleaned up various ECDH, ECDSA and EC internals. - Replaced ASN1_bn_print with a cleaner internal implementation. - Simplified ASN1_item_sign_ctx(). - Rewrote OBJ_find_sigid_algs() and OBJ_find_sigid_by_algs(). - Various improvements in the 'simple' EC code. - Fix OPENSSL_cpuid_setup() invocations on arm/aarch64. - Reduced the dependency of hash implementations on many layers of macros. This results in significant speedups since modern compilers are now less confused. - Significantly simplified the BN_BLINDING internals used in RSA. * New features * Compatibility changes - X509_NAME_get_text_by_{NID,OBJ}() now only succeed if they contain valid UTF-8 without embedded NUL. - Moved libtls from ECDSA_METHOD to EC_KEY_METHOD. - Removed support for ECDH_METHOD and ECDSA_METHOD. - BN_is_prime{,_fasttest}_ex() refuse to check numbers larger than 32 kbits for primality. This mitigates various DoS vectors. - Comp was removed. - Dynamic loading of conf modules is no longer supported. - DSO was removed and OPENSSL_NO_DSO is defined. - ENGINE support was removed and OPENSSL_NO_ENGINE is set. In spite of this, some stub functions are provided to avoid patching some applications that do not honor OPENSSL_NO_ENGINE. - It is no longer possible to make the library use your own error stack or ex_data implementation. * Bug fixes - Fixed aliasing issue in BN_mod_inverse(). - Made CRYPTO_get_ex_new_index() not return 0 to allow applications to use *_{get,set}_app_data() and *_{get,set}_ex_data() alongside each other. - Made EVP_PKEY_set1_hkdf_key() fail on a NULL key. - Plugged leaks in BIO_chain_dup(). - Fixed numerous leaks and other minor bugs in RSA, DH, DSA and EC ASN.1 methods. Unified the coding style. - On socket errors in the poll loop, netcat could issue system calls on invalidated file descriptors. * Documentation improvements - Made it very explicit that the verify callback should not be used. - Called out that the CRL lastUpdate is standardized as thisUpdate. * Testing and Proactive Security - As always, new test coverage is added as bugs are fixed and subsystems are cleaned up. * Security fixes - Disabled TLSv1.0 and TLSv1.1 in libssl so that they may no longer be selected for use. 3.8.0 - Development release * Portable changes - Extended the endian.h compat header with hto* and *toh macros. - Adapted more tests to the portable framework. - Internal tools are now statically linked. * Internal improvements - Improved sieve of Eratosthenes script used for generating a table of small primes. - Started cleaning up and rewriting SHA internals. - Replace internal use of BN_copy() with bn_copy() for consistency. - Rewrote and improved BN_exp() and BN_copy(). - Add branch target information (BTI) support to arm64 assembly. - Replaced BN_mod_sqrt() with a new implementation. - Removed incomplete and dangerous BN_RECURSION code. - Added endbr64 instructions to amd64 assembly. - Imported RFC 5280 policy checking code from BoringSSL and used it to replace the old exponential time code. - Converted more of libcrypto to use CBB/CBS. - Cleaned up and simplified the code dealing with builtin curves. * New features - Added support for truncated SHA-2 and for SHA-3. - The BPSW primality test performs additional Miller-Rabin rounds with random bases to reduce the likelihood of composites passing. - Allow testing of ciphers and digests using badly aligned buffers in openssl speed. - Added a workaround for a poorly thought-out change in OpenSSL 3 that broke privilege separation support in libtls. * Compatibility changes - Support for GF2m was removed: BIGNUM no longer supports binary extension field arithmetic and all binary elliptic builtin curves were removed. - Removed dangerous, "fast" NIST prime and elliptic curve implementations. In particular, EC_GFp_nist_method() is no longer available. - Removed most public symbols that were deprecated in OpenSSL 0.9.8. - Removed the public X9.31 API (RSA_X931_PADDING is still available). - Removed Cipher Text Stealing mode. - Removed SXNET and NETSCAPE_CERT_SEQUENCE support including the openssl(1) nseq command. - Dropped proxy certificate (RFC 3820) support. - The POLICY_TREE and its related structures and API were removed. - The explicitText user notice uses UTF8String instead of VisibleString to reduce the risk of emitting certificates with invalid DER-encoding. - Initial fixes for RSA-PSS support to make the TLSv1.3 stack more compliant with RFC 8446. * Bug fixes - Correctly handle negative input to various BIGNUM functions. - Ensure ERR_load_ERR_strings() does not set errno unexpectedly. - Fix error checking of i2d_ECDSA_SIG() in ossl_ecdsa_sign(). - Fixed detection of extended operations (XOP) on AMD hardware. - Ensure Montgomery exponentiation is used for the initial RSA blinding. - Policy is always checked in X509 validation. Critical policy extensions are no longer silently ignored. - Fixed error handling in tls_check_common_name(). - Add missing pointer invalidation in SSL_free(). - Fixed X509err() and X509V3err() and their internal versions. - Ensure that OBJ_obj2txt() always returns a C string again. - In X509_VERIFY_PARAM_inherit() copy hostflags independently of the host list. * Documentation improvements - Improved documentation of BIO_ctrl(3), BIO_set_info_callback(3), BIO_get_info_callback(3), BIO_method_type(3), and BIO_method_name(3). - Marked BIO_CB_return(), BIO_cb_pre(), and BIO_cb_post() as intentionally undocumented. * Testing and Proactive Security - Significantly improved test coverage of BN_mod_sqrt() and GCD. - As always, new test coverage is added as bugs are fixed and subsystems are cleaned up. 3.7.3 - Bug and reliability fixes * Bug fix - Hostflags in the verify parameters would not propagate from an SSL_CTX to newly created SSL. * Reliability fix - A double free or use after free could occur after SSL_clear(3). 3.7.2 - Stable release * Portable changes - Moved official Github project to https://github.com/libressl/. - Build support for Apple Silicon. - Installed opensslconf.h is now architecture-specific. - Removed internal defines from opensslconf.h. - Support reproducible builds on tagged commits in main branch. 3.7.1 - Development release * Internal improvements - Initial overhaul of the BIGNUM code: - Added a new framework that allows architecture-dependent replacement implementations for bignum primitives. - Imported various s2n-bignum's constant time assembly primitives and switched amd64 to them. - Lots of cleanup, simplification and bug fixes. - Changed Perl assembly generators to move constants into .rodata, allowing code to run with execute-only permissions. - Capped the number of iterations in DSA and ECDSA signing (avoiding infinite loops), added additional sanity checks to DSA. - ASN.1 parsing improvements. - Made UI_destroy_method() NULL safe. - Various improvements to nc(1). - Always clear EC groups and points on free. - Cleanup and improvements in EC code. - Various openssl(1) improvements. * Bug fixes - Fixed a memory leak, a double free and various other issues in BIO_new_NDEF(). - Fixed various crashes in the openssl(1) testing utility. - Do not check policies by default in the new X.509 verifier. - Added missing error checking in PKCS7. - Call CRYPTO_cleanup_all_ex_data() from OPENSSL_cleanup(). * New features - Added UI_null() - Added X509_STORE_*check_issued() - Added X509_CRL_get0_tbs_sigalg() and X509_get0_uids() accessors. - Added EVP_CIPHER_meth_*() setter API. * Documentation improvements - Marked BIO_s_log(3) BIO_nread0(3), BIO_nread(3), BIO_nwrite0(3), BIO_nwrite(3), BIO_dump_cb(3) and BIO_dump_indent_cb(3) as intentionally undocumented. - Document BIO_number_read(3), BIO_number_written(3), BIO_set_retry_read(3), BIO_set_retry_write(3), BIO_set_retry_special(3), BIO_clear_retry_flags(3), BIO_get_retry_flags(3), BIO_dup_chain(3), BIO_set_flags(3), BIO_clear_flags(3), BIO_test_flags(3), BIO_get_flags(3). BIO_callback_fn_ex(3), BIO_set_callback_ex(3), BIO_get_callback_ex(3), BIO_callback_fn(3), and the BIO_FLAGS_* constants - Correct the prototypes of BIO_get_conn_ip(3) and BIO_get_conn_int_port(3). - Document ED25519_keypair(3), ED25519_sign(3), and ED25519_verify(3). - Document EVP_PKEY_new_raw_private_key(3), EVP_PKEY_new_raw_public_key(3), EVP_PKEY_get_raw_private_key(3), and EVP_PKEY_get_raw_public_key(3). - Document ASN1_buf_print(3). - Document DH_get0_*, DSA_get0_*, ECDSA_SIG_get0_{r,s}() and RSA_get0_*. - Merged documentation of UI_null() from OpenSSL 1.1 - Various spelling and other documentation improvements. * Testing and Proactive Security - As always, new test coverage is added as bugs are fixed and subsystems are cleaned up. - New Wycheproof tests added. - OpenSSL 3.0 Interop tests added. - Many old tests rewritten, cleaned up and extended. * Security fixes - A malicious certificate revocation list or timestamp response token would allow an attacker to read arbitrary memory. 3.7.0 - Development release * Internal improvements - Remove dependency on system timegm() and gmtime() by replacing traditional Julian date conversion with POSIX epoch-seconds date conversion from BoringSSL. - Clean old and unused BN code dealing with primes. - Start rewriting name constraints code using CBS. - Remove support for the HMAC PRIVATE KEY. - Rework DSA signing and verifying internals. - First few passes on cleaning up the BN code. - Internal headers coming from OpenSSL are all called *_local.h now. - Rewrite TLSv1.2 key exporter. - Cleaned up and refactored various aspects of the legacy TLS stack. * Compatibility changes - BIO_read() and BIO_write() now behave more closely to OpenSSL 3 in various corner cases. More work is needed here. * Bug fixes - Add EVP_chacha20_poly1305() to the list of all ciphers. - Fix potential leaks of EVP_PKEY in various printing functions - Fix potential leak in OBJ_NAME_add(). - Avoid signed overflow in i2c_ASN1_BIT_STRING(). - Clean up EVP_PKEY_ASN1_METHOD related tables and code. - Fix long standing bugs BN_GF2m_poly2arr() and BN_GF2m_mod(). - Fix segfaults in BN_{dec,hex}2bn(). - Fix NULL dereference in x509_constraints_uri_host() reachable only in the process of generating certificates. - Fixed a variety of memory corruption issues in BIO chains coming from poor old and new API: BIO_push(), BIO_pop(), BIO_set_next(). - Avoid potential divide by zero in BIO_dump_indent_cb() * Documentation improvements - Numerous improvements and additions for ASN.1, BIO, BN, and X.509. - The BN documentation is now considered to be complete. * Testing and Proactive Security - As always, new test coverage is added as bugs are fixed and subsystems are cleaned up. - Many old tests rewritten, cleaned up and extended. * New features - Added Ed25519 support both as a primitive and via OpenSSL's EVP interfaces. - X25519 is now also supported via EVP. - The OpenSSL 1.1 raw public and private key API is available with support for EVP_PKEY_ED25519, EVP_PKEY_HMAC and EVP_PKEY_X25519. Poly1305 is not currently supported via this interface. 3.6.3 - Bug and reliability fixes * Bug fix - Hostflags in the verify parameters would not propagate from an SSL_CTX to newly created SSL. * Reliability fix - A double free or use after free could occur after SSL_clear(3). 3.6.2 - Security release * Security fix - A malicious certificate revocation list or timestamp response token would allow an attacker to read arbitrary memory. 3.6.1 - Stable release * Bug fixes - Custom verification callbacks could cause the X.509 verifier to fail to store errors resulting from leaf certificate verification. Reported by Ilya Shipitsin. - Unbreak ASN.1 indefinite length encoding. Reported by Niklas Hallqvist. 3.6.0 - Development release * Internal improvements - Avoid expensive RFC 3779 checks during cert verification. - The templated ASN.1 decoder has been cleaned up, refactored, modernized with parts rewritten using CBB and CBS. - The ASN.1 time parser has been rewritten. - Rewrite and fix ASN1_STRING_to_UTF8(). - Use asn1_abs_set_unused_bits() rather than inlining it. - Simplify ec_asn1_group2curve(). - First pass at a clean up of ASN1_item_sign_ctx() - ssl_txt.c was cleaned up. - Internal function arguments and struct member have been changed to size_t. - Lots of missing error checks of EVP API were added. - Clean up and clarify BN_kronecker(). - Simplify ASN1_INTEGER_cmp() - Rewrite ASN1_INTEGER_{get,set}() using CBS and CBB and reuse the ASN1_INTEGER functions for ASN1_ENUMERATED. - Use ASN1_INTEGER to parse and build {Z,}LONG_it - Refactored and cleaned up group (elliptic curve) handling in t1_lib.c. - Simplify certificate list handling code in the legacy server. - Make CBB_finish() fail if *out_data is not NULL. - Remove tls_buffer_set_data() and remove/revise callers. - Rewrite SSL{_CTX,}_set_alpn_protos() using CBS. - Simplify tlsext_supported_groups_server_parse(). - Remove redundant length checks in tlsext parse functions. - Simplify tls13_server_encrypted_extensions_recv(). - Add read and write support to tls_buffer. - Convert TLS transcript from BUF_MEM to tls_buffer. - Clear key on exit in PKCS12_gen_mac(). - Minor fixes in PKCS12_parse(). - Provide and use a primitive clear function for BIGNUM_it. - Use ASN1_INTEGER to encode/decode BIGNUM_it. - Add stack frames to AES-NI x86_64 assembly. - Use named initialisers for BIGNUMs. - Tidy up some of BN_nist_mod_*. - Expand BLOCK_CIPHER_* and related macros. - Avoid shadowing the cbs function parameter in tlsext_alpn_server_parse() - Deduplicate peer certificate chain processing code. - Make it possible to signal an error from an i2c_* function. - Rewrite i2c_ASN1_INTEGER() using CBB/CBS. - Remove UINT32_MAX limitation on ChaCha() and CRYPTO_chacha_20(). - Remove bogus length checks from EVP_aead_chacha20_poly1305(). - Reworked DSA_size() and ECDSA_size(). - Stop using CBIGNUM_it internal to libcrypto. - Provide c2i_ASN1_ENUMERATED_cbs() and call it from asn1_c2i_primitive(). - Ensure ASN.1 types are appropriately encoded. - Avoid recycling ASN1_STRINGs when decoding ASN.1. - Tidy up asn1_c2i_primitive() slightly. - Mechanically expand IMPLEMENT_BLOCK_CIPHER, IMPLEMENT_CFBR, BLOCK_CIPHER and the looney M_do_cipher macros. - Use correct length for EVP CFB mode ciphers. - Provide a version of ssl_msg_callback() that takes a CBS. - Use CBS to parse TLS alerts in the legacy stack. - Increment the input and output position for EVP AES CFB1. - Ensure there is no trailing data for a CCS received by the TLSv1.3 stack. - Use CBS when procesing a CCS message in the legacy stack. - Be stricter with middlebox compatibility mode in the TLSv1.3 server. * Compatibility changes - The ASN.1 time parser has been refactored and rewritten using CBS. It has been made stricter in that it now enforces the rules from RFC 5280. - ASN1_AFLG_BROKEN was removed. - Error check tls_session_secret_cb() like OpenSSL. - Added ASN1_INTEGER_{get,set}_{u,}int64() - Move leaf certificate checks to the last thing after chain validation. - Added -s option to openssl(1) ciphers that only shows the ciphers supported by the specified protocol. - Use TLS_client_method() instead of TLSv1_client_method() in the openssl(1) ciphers command. - Validate the protocols in SSL{_CTX,}_set_alpn_protos(). - Made TS and PKCS12 opaque. - Per RFC 7292, safeContentsBag is a SEQUENCE OF, not a SET OF. - Align PKCS12_key_gen_uni() with OpenSSL - Various PKCS12 and TS accessors were added. In particular, the TS_RESP_CTX_set_time_cb() function was added back. - Allow a NULL header in PEM_write{,_bio}() - Allow empty attribute sets in CSRs. - Adjust signatures of BIO_ctrl functions. - Provide additional defines for EVP AEAD. - Provide OPENSSL_cleanup(). - Make BIO_info_cb() identical to bio_info_cb(). * Bug fixes - Avoid use of uninitialized in BN_mod_exp_recp(). - Fix X509_get_extension_flags() by ensuring that EXFLAG_INVALID is set on X509_get_purpose() failure. - Fix HMAC() with NULL key. - Add ERR_load_{COMP,CT,KDF}_strings() to ERR_load_crypto_strings(). - Avoid strict aliasing violations in BN_nist_mod_*(). - Do not return X509_V_ERR_UNSPECIFIED from X509_check_ca(). No return value of X509_check_ca() indicates failure. Application code should therefore issue a checked call to X509_check_purpose() before calling X509_check_ca(). - Rewrite and fix X509v3_asid_subset() to avoid segfaults on some valid input. - Call the ASN1_OP_D2I_PRE callback after ASN1_item_ex_new(). - Fix d2i_ASN1_OBJECT to advance the *der_in pointer correctly. - Avoid use of uninitialized in ASN1_STRING_to_UTF8(). - Do not pass uninitialized pointer to ASN1_STRING_to_UTF8(). - Do not refuse valid IPv6 addresses in nc(1)'s HTTP CONNECT proxy. - Do not reject primes in trial divisions. - Error out on negative shifts in BN_{r,l}shift() instead of accessing arrays out of bounds. - Fix URI name constraints, allow for URI's with no host part. - Fix the legacy verifier callback behaviour for untrusted certs. - Correct serfver-side handling of TLSv1.3 key updates. - Plug leak in PKCS12_setup_mac(). - Plug leak in X509V3_add1_i2d(). - Only print X.509 versions we know about. - Avoid signed integer overflow due to unary negation - Initialize readbytes in BIO_gets(). - Plug memory leak in CMS_add_simple_smimecap(). - Plug memory leak in X509_REQ_print_ex(). - Check HMAC() return value to avoid a later use of uninitialized. - Avoid potential NULL dereference in ssl_set_pkey(). - Check return values in ssl_print_tmp_key(). - Switch loop bounds from size_t to int in check_hosts(). - Avoid division by zero if no connection was made in s_time.c. - Check sk_SSL_CIPHER_push() return value - Avoid out-of-bounds read in ssl_cipher_process_rulestr(). - Use LONG_MAX as the limit for ciphers with long based APIs. * New features - EVP API for HKDF ported from OpenSSL and subsequently cleaned up. - The security level API (SSL_{,CTX}_{get,set}_security_level()) is now available. Callbacks and ex_data are not supported. Sane software will not be using this. - Experimental support for the BoringSSL QUIC API. - Add initial support for TS ESSCertIDv2 verification. - LibreSSL now uses the Baillie-PSW primality test instead of Miller-Rabin . 3.5.3 - Reliability fix * Fix d2i_ASN1_OBJECT(). A confusion of two CBS resulted in advancing the passed *der_in pointer incorrectly. Thanks to Aram Sargsyan for reporting the issue and testing the fix. 3.5.2 - Stable release * Bug fixes - Avoid single byte overread in asn1_parse2(). - Allow name constraints with a leading dot. From Alex Wilson. - Relax a check in x509_constraints_dirname() to allow prefixes. From Alex Wilson. - Fix NULL dereferences in openssl(1) cms option parsing. - Do not zero the computed cofactor on ec_guess_cofactor() success. - Bound cofactor in EC_GROUP_set_generator() to reduce the number of bogus groups that can be described with nonsensical parameters. - Avoid various potential segfaults in EVP_PKEY_CTX_free() in low memory conditions. Reported for HMAC by Masaru Masuda. - Plug leak in ASN1_TIME_adj_internal(). - Avoid infinite loop for custom curves of order 1. Issue reported by Hanno Boeck, comments by David Benjamin. - Avoid an infinite loop on parsing DSA private keys by validating that the provided parameters conform to FIPS 186-4. Issue reported by Hanno Boeck, comments by David Benjamin. * Compatibility improvements - Allow non-standard name constraints of the form @domain.com. * Internal improvements - Limit OID text conversion to 64 bits per arc. - Clean up and simplify memory BIO code. - Reduce number of memmove() calls in memory BIOs. - Factor out alert handling code in the legacy stack. - Add sanity checks on p and q in old_dsa_priv_decode() - Cache the SHA-512 hash instead of the SHA-1 for CRLs. - Suppress various compiler warnings for old gcc versions. - Remove free_cont from asn1_d2i_ex_primitive()/asn1_ex_c2i(). - Rework ownership handling in x509_constraints_validate(). - Rework ASN1_STRING_set(). - Remove const from tls1_transcript_hash_value(). - Clean up and simplify ssl3_renegotiate{,_check}(). - Rewrite legacy TLS and DTLS unexpected handshake message handling. - Simplify SSL_do_handshake(). - Rewrite ASCII/text to ASN.1 object conversion. - Provide t2i_ASN1_OBJECT_internal() and use it for OBJ_txt2obj(). - Split armv7 and aarch64 code into separate locations. - Rewrote openssl(1) ts to use the new option handling and cleaned up the C code. - Provide asn1_get_primitive(). - Convert {c2i,d2i}_ASN1_OBJECT() to CBS. - Remove the minimum record length checks from dtls1_read_bytes(). - Clean up {dtls1,ssl3}_read_bytes(). - Be more careful with embedded and terminating NULs in the new name constraints code. - Check EVP_Digest* return codes in openssl(1) ts - Various minor code cleanup in openssl(1) pkcs12 - Use calloc() in pkey_hmac_init(). - Simplify priv_key handling in d2i_ECPrivateKey(). * Documentation improvements - Update d2i_ASN1_OBJECT(3) documentation to reflect reality after refactoring and bug fixes. - Fixed numerous minor grammar, spelling, wording, and punctuation issues. 3.5.1 - Security release * A malicious certificate can cause an infinite loop. Reported by and fix from Tavis Ormandy and David Benjamin, Google. 3.5.0 - Development release * New Features - The RFC 3779 API was ported from OpenSSL. Many bugs were fixed, regression tests were added and the code was cleaned up. - Certificate Transparency was ported from OpenSSL. Many internal improvements were made, resulting in cleaner and safer code. Regress coverage was added. libssl does not yet make use of it. * Portable Improvements - Fixed various POSIX compliance and other portability issues found by the port to the Sortix operating system. - Add libmd as platform specific libraries for Solaris. Issue reported from (ihsan opencsw org) on libressl ML. - Set IA-64 compiler flag only if it is HP-UX with IA-64. Suggested from Larkin Nickle (me larbob org) by libressl ML. - Enabled and scheduled Coverity scan. Contributed by Ilya Shipitsin (chipitsine gmail com> on github. * Compatibility Changes - Most structs that were previously defined in the following headers are now opaque as they are in OpenSSL 1.1: bio.h, bn.h, comp.h, dh.h, dsa.h, evp.h, hmac.h, ocsp.h, rsa.h, x509.h, x509v3.h, x509_vfy.h - Switch TLSv1.3 cipher names from AEAD- to OpenSSL's TLS_ OpenSSL added the TLSv1.3 ciphersuites with "RFC names" instead of using something consistent with the previous naming. Various test suites expect these names (instead of checking for the much more sensible cipher numbers). The old names are still accepted as aliases. - Subject alternative names and name constraints are now validated when they are added to certificates. Various interoperability problems with stacks that validate certificates more strictly than OpenSSL can be avoided this way. - Attempt to opportunistically use the host name for SNI in s_client * Bug fixes - In some situations, the verifier would discard the error on an unvalidated certificate chain. This would happen when the verification callback was in use, instructing the verifier to continue unconditionally. This could lead to incorrect decisions being made in software. - Avoid an infinite loop in SSL_shutdown() - Fix another return 0 bug in SSL_shutdown() - Handle zero byte reads/writes that trigger handshakes in the TLSv1.3 stack - A long standing memleak in libtls CRL handling was fixed * Internal Improvements - Cache the SHA-512 hash instead of the SHA-1 hash and cache notBefore and notAfter times when X.509 certificates are parsed. - The X.509 lookup code has been simplified and cleaned up. - Fixed numerous issues flagged by coverity and the cryptofuzz project - Increased the number of Miller-Rabin checks in DH and DSA key/parameter generation - Started using the bytestring API in libcrypto for cleaner and safer code - Convert {i2d,d2i}_{,EC_,DSA_,RSA_}PUBKEY{,_bio,_fp}() to templated ASN1 - Convert ASN1_OBJECT_new() to calloc() - Convert ASN1_STRING_type_new() to calloc() - Rewrite ASN1_STRING_cmp() - Use calloc() for X509_CRL_METHOD_new() instead of malloc() - Convert ASN1_PCTX_new() to calloc() - Replace asn1_tlc_clear and asn1_tlc_clear_nc macros with a function - Consolidate {d2i,i2d}_{pr,pu}.c - Remove handling of a NULL BUF_MEM from asn1_collect() - Pull the recursion depth check up to the top of asn1_collect() - Inline collect_data() in asn1_collect() - Convert asn1_d2i_ex_primitive()/asn1_collect() from BUF_MEM to CBB - Clean up d2i_ASN1_BOOLEAN() and i2d_ASN1_BOOLEAN() - Consolidate ASN.1 universal tag type data - Rewrite ASN.1 identifier/length parsing in CBS - Make OBJ_obj2nid() work correctly with NID_undef - tlsext_tick_lifetime_hint is now an uint32_t - Untangle ssl3_get_message() return values - Rename tls13_buffer to tls_buffer - Fold DTLS_STATE_INTERNAL into DTLS1_STATE - Provide a way to determine our maximum legacy version - Mop up enc_read_ctx and read_hash - Fold SSL_SESSION_INTERNAL into SSL_SESSION - Use ssl_force_want_read in the DTLS code - Add record processing limit to DTLS code - Add explicit CBS_contains_zero_byte() check in CBS_strdup() - Improve SNI hostname validation - Ensure SSL_set_tlsext_host_name() is given a valid hostname - Fix a strange check in the auto DH codepath - Factor out/rewrite DHE key exchange - Convert server serialisation of DHE parameters/public key to new functions - Check DH public key in ssl_kex_peer_public_dhe() - Move the minimum DHE key size check into ssl_kex_peer_params_dhe() - Clean up and refactor server side DHE key exchange - Provide CBS_get_last_u8() - Provide CBS_get_u64() - Provide CBS_add_u64() - Provide various CBS_peek_* functions - Use CBS_get_last_u8() to find the content type in TLSv1.3 records - unifdef TLS13_USE_LEGACY_CLIENT_AUTH - Correct SSL_get_peer_cert_chain() when used with the TLSv1.3 stack - Only allow zero length key shares when we know we're doing HRR - Pull key share group/length CBB code up from tls13_key_share_public() - Refactor ssl3_get_server_kex_ecdhe() to separate parsing and validation - Return 0 on failure from send/get kex functions in the legacy stack - Rename tls13_key_share to tls_key_share - Allocate and free the EVP_AEAD_CTX struct in tls13_record_protection - Convert legacy TLS client to tls_key_share - Convert legacy TLS server to tls_key_share - Stop attempting to duplicate the public and private key of dh_tmp - Rename dh_tmp to dhe_params - Rename CERT to SSL_CERT and CERT_PKEY to SSL_CERT_PKEY - Clean up pkey handling in ssl3_get_server_key_exchange() - Fix GOST skip certificate verify handling - Simplify tlsext_keyshare_server_parse() - Plumb decode errors through key share parsing code - Simplify SSL_get_peer_certificate() - Cleanup/simplify ssl_cert_type() - The S3I macro was removed - The openssl(1) cms and smime subcommands option handling was converted and the C source was cleaned up. * Documentation improvements - 45 new manual pages, most of which were written from scratch. Documentation coverage of ASN.1 and X.509 code has been significantly improved. * API additions and removals - libssl API additions SSL_get0_verified_chain SSL_peek_ex SSL_read_ex SSL_write_ex API stubs for compatibility SSL_CTX_get_keylog_callback SSL_CTX_get_num_tickets SSL_CTX_set_keylog_callback SSL_CTX_set_num_tickets SSL_get_num_tickets SSL_set_num_tickets - libcrypto added API (some of these were previously available as macros): ASIdOrRange_free ASIdOrRange_new ASIdentifierChoice_free ASIdentifierChoice_new ASIdentifiers_free ASIdentifiers_new ASN1_TIME_diff ASRange_free ASRange_new BIO_get_callback_ex BIO_get_init BIO_set_callback_ex BIO_set_next BIO_set_retry_reason BN_GENCB_set BN_GENCB_set_old BN_abs_is_word BN_get_flags BN_is_negative BN_is_odd BN_is_one BN_is_word BN_is_zero BN_set_flags BN_to_montgomery BN_with_flags BN_zero_ex CTLOG_STORE_free CTLOG_STORE_get0_log_by_id CTLOG_STORE_load_default_file CTLOG_STORE_load_file CTLOG_STORE_new CTLOG_free CTLOG_get0_log_id CTLOG_get0_name CTLOG_get0_public_key CTLOG_new CTLOG_new_from_base64 CT_POLICY_EVAL_CTX_free CT_POLICY_EVAL_CTX_get0_cert CT_POLICY_EVAL_CTX_get0_issuer CT_POLICY_EVAL_CTX_get0_log_store CT_POLICY_EVAL_CTX_get_time CT_POLICY_EVAL_CTX_new CT_POLICY_EVAL_CTX_set1_cert CT_POLICY_EVAL_CTX_set1_issuer CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE CT_POLICY_EVAL_CTX_set_time DH_get0_g DH_get0_p DH_get0_priv_key DH_get0_pub_key DH_get0_q DH_get_length DSA_bits DSA_get0_g DSA_get0_p DSA_get0_priv_key DSA_get0_pub_key DSA_get0_q ECDSA_SIG_get0_r ECDSA_SIG_get0_s EVP_AEAD_CTX_free EVP_AEAD_CTX_new EVP_CIPHER_CTX_buf_noconst EVP_CIPHER_CTX_get_cipher_data EVP_CIPHER_CTX_set_cipher_data EVP_MD_CTX_md_data EVP_MD_CTX_pkey_ctx EVP_MD_CTX_set_pkey_ctx EVP_MD_meth_dup EVP_MD_meth_free EVP_MD_meth_new EVP_MD_meth_set_app_datasize EVP_MD_meth_set_cleanup EVP_MD_meth_set_copy EVP_MD_meth_set_ctrl EVP_MD_meth_set_final EVP_MD_meth_set_flags EVP_MD_meth_set_init EVP_MD_meth_set_input_blocksize EVP_MD_meth_set_result_size EVP_MD_meth_set_update EVP_PKEY_asn1_set_check EVP_PKEY_asn1_set_param_check EVP_PKEY_asn1_set_public_check EVP_PKEY_check EVP_PKEY_meth_set_check EVP_PKEY_meth_set_param_check EVP_PKEY_meth_set_public_check EVP_PKEY_param_check EVP_PKEY_public_check FIPS_mode FIPS_mode_set IPAddressChoice_free IPAddressChoice_new IPAddressFamily_free IPAddressFamily_new IPAddressOrRange_free IPAddressOrRange_new IPAddressRange_free IPAddressRange_new OBJ_get0_data OBJ_length OCSP_resp_get0_certs OCSP_resp_get0_id OCSP_resp_get0_produced_at OCSP_resp_get0_respdata OCSP_resp_get0_signature OCSP_resp_get0_signer OCSP_resp_get0_tbs_sigalg PEM_write_bio_PrivateKey_traditional RSA_get0_d RSA_get0_dmp1 RSA_get0_dmq1 RSA_get0_e RSA_get0_iqmp RSA_get0_n RSA_get0_p RSA_get0_pss_params RSA_get0_q SCT_LIST_free SCT_LIST_print SCT_LIST_validate SCT_free SCT_get0_extensions SCT_get0_log_id SCT_get0_signature SCT_get_log_entry_type SCT_get_signature_nid SCT_get_source SCT_get_timestamp SCT_get_validation_status SCT_get_version SCT_new SCT_new_from_base64 SCT_print SCT_set0_extensions SCT_set0_log_id SCT_set0_signature SCT_set1_extensions SCT_set1_log_id SCT_set1_signature SCT_set_log_entry_type SCT_set_signature_nid SCT_set_source SCT_set_timestamp SCT_set_version SCT_validate SCT_validation_status_string X509_OBJECT_free X509_OBJECT_new X509_REQ_get0_pubkey X509_SIG_get0 X509_SIG_getm X509_STORE_CTX_get_by_subject X509_STORE_CTX_get_num_untrusted X509_STORE_CTX_get_obj_by_subject X509_STORE_CTX_get_verify X509_STORE_CTX_get_verify_cb X509_STORE_CTX_set0_verified_chain X509_STORE_CTX_set_current_cert X509_STORE_CTX_set_error_depth X509_STORE_CTX_set_verify X509_STORE_get_verify X509_STORE_get_verify_cb X509_STORE_set_verify X509_get_X509_PUBKEY X509_get_extended_key_usage X509_get_extension_flags X509_get_key_usage X509v3_addr_add_inherit X509v3_addr_add_prefix X509v3_addr_add_range X509v3_addr_canonize X509v3_addr_get_afi X509v3_addr_get_range X509v3_addr_inherits X509v3_addr_is_canonical X509v3_addr_subset X509v3_addr_validate_path X509v3_addr_validate_resource_set X509v3_asid_add_id_or_range X509v3_asid_add_inherit X509v3_asid_canonize X509v3_asid_inherits X509v3_asid_is_canonical X509v3_asid_subset X509v3_asid_validate_path X509v3_asid_validate_resource_set d2i_ASIdOrRange d2i_ASIdentifierChoice d2i_ASIdentifiers d2i_ASRange d2i_IPAddressChoice d2i_IPAddressFamily d2i_IPAddressOrRange d2i_IPAddressRange d2i_SCT_LIST i2d_ASIdOrRange i2d_ASIdentifierChoice i2d_ASIdentifiers i2d_ASRange i2d_IPAddressChoice i2d_IPAddressFamily i2d_IPAddressOrRange i2d_IPAddressRange i2d_SCT_LIST i2d_re_X509_CRL_tbs i2d_re_X509_REQ_tbs i2d_re_X509_tbs i2o_SCT i2o_SCT_LIST o2i_SCT o2i_SCT_LIST removed API: ASN1_check_infinite_end ASN1_const_check_infinite_end EVP_dss EVP_dss1 EVP_ecdsa HMAC_CTX_cleanup HMAC_CTX_init NETSCAPE_ENCRYPTED_PKEY_free NETSCAPE_ENCRYPTED_PKEY_new NETSCAPE_PKEY_free NETSCAPE_PKEY_new NETSCAPE_X509_free NETSCAPE_X509_new OBJ_bsearch_ex_ PEM_SealFinal PEM_SealInit PEM_SealUpdate PEM_read_X509_CERT_PAIR PEM_read_bio_X509_CERT_PAIR PEM_write_X509_CERT_PAIR PEM_write_bio_X509_CERT_PAIR X509_CERT_PAIR_free X509_CERT_PAIR_new X509_OBJECT_free_contents asn1_do_adb asn1_do_lock asn1_enc_free asn1_enc_init asn1_enc_restore asn1_enc_save asn1_ex_c2i asn1_get_choice_selector asn1_get_field_ptr asn1_set_choice_selector check_defer d2i_ASN1_BOOLEAN d2i_NETSCAPE_ENCRYPTED_PKEY d2i_NETSCAPE_PKEY d2i_NETSCAPE_X509 d2i_Netscape_RSA d2i_RSA_NET d2i_X509_CERT_PAIR i2d_ASN1_BOOLEAN i2d_NETSCAPE_ENCRYPTED_PKEY i2d_NETSCAPE_PKEY i2d_NETSCAPE_X509 i2d_Netscape_RSA i2d_RSA_NET i2d_X509_CERT_PAIR name_cmp obj_cleanup_defer 3.4.1 - Stable release * New Features - Added support for OpenSSL 1.1.1 TLSv1.3 APIs. - Enabled the new X.509 validator to allow verification of modern certificate chains. * Portable Improvements - Ported continuous integration and test infrastructure to Github actions. - Added Universal Windows Platform (UWP) build support. - Fixed mingw-w64 builds on newer versions with missing SSP support. - Added non-executable stack annotations for CMake builds. * API and Documentation Enhancements - Added the following APIs from OpenSSL BN_bn2binpad BN_bn2lebinpad BN_lebin2bn EC_GROUP_get_curve EC_GROUP_order_bits EC_GROUP_set_curve EC_POINT_get_affine_coordinates EC_POINT_set_affine_coordinates EC_POINT_set_compressed_coordinates EVP_DigestSign EVP_DigestVerify SSL_CIPHER_find SSL_CTX_get0_privatekey SSL_CTX_get_max_early_data SSL_CTX_get_ssl_method SSL_CTX_set_ciphersuites SSL_CTX_set_max_early_data SSL_CTX_set_post_handshake_auth SSL_SESSION_get0_cipher SSL_SESSION_get_max_early_data SSL_SESSION_is_resumable SSL_SESSION_set_max_early_data SSL_get_early_data_status SSL_get_max_early_data SSL_read_early_data SSL_set0_rbio SSL_set_ciphersuites SSL_set_max_early_data SSL_set_post_handshake_auth SSL_set_psk_use_session_callback SSL_verify_client_post_handshake SSL_write_early_data - Added AES-GCM constants from RFC 7714 for SRTP. * Compatibility Changes - Implement flushing for TLSv1.3 handshakes behavior, needed for Apache. - Call the info callback on connect/accept exit in TLSv1.3, needed for p5-Net-SSLeay. - Default to using named curve parameter encoding from pre-OpenSSL 1.1.0, adding OPENSSL_EC_EXPLICIT_CURVE. - Do not ignore SSL_TLSEXT_ERR_FATAL from the ALPN callback. * Testing and Proactive Security - Added additional state machine test coverage. - Improved integration test support with ruby/openssl tests. - Error codes and callback support in new X.509 validator made compatible with p5-Net_SSLeay tests. * Internal Improvements - Numerous fixes and improvements to the new X.509 validator to ensure compatible error codes and callback support compatible with the legacy OpenSSL validator. 3.4.0 - Development release * Add support for OpenSSL 1.1.1 TLSv1.3 APIs. * Enable new x509 validator. * More details to come, testing is appreciated. 3.3.5 - Security fix * A stack overread could occur when checking X.509 name constraints. From GoldBinocle on GitHub. * Enable X509_V_FLAG_TRUSTED_FIRST by default in the legacy verifier. This compensates for the expiry of the DST Root X3 certificate. 3.3.4 - Security fix * In LibreSSL, printing a certificate can result in a crash in X509_CERT_AUX_print(). From Ingo Schwarze * Ensure GNU-stack is set on ELF platforms when building with CMake to enable non-executable stack annotations for the GNU toolchain. From Tobias Heider 3.3.3 - Stable release * This is the first stable release from the 3.3.x series. There are no changes from 3.3.2. 3.3.2 - Development release * This release adds support for DTLSv1.2 and continues the rewrite of the record layer for the legacy stack. Numerous bugs and interoperability issues were fixed in the new verifier. A few bugs and incompatibilities remain, so this release uses the old verifier by default. The OpenSSL 1.1 TLSv1.3 API is not yet available. * Switch finish{,_peer}_md_len from an int to a size_t. * Make SSL_get{,_peer}_finished() work when used with TLSv1.3. * Use EVP_MD_MAX_MD_SIZE instead of 2 * EVP_MD_MAX_MD_SIZE as size for cert_verify_md[], finish_md[] and peer_finish_md[]. The factor 2 was a historical artefact. * Correct the return value type from ERR_peek_error() to a long. * Avoid use of uninitialized in ASN1_time_parse() which could happen on parsing UTCTime if the caller did not initialise the passed struct tm. * Destroy the mutex in a tls_config object on tls_config_free(). * Free alert_data and phh_data in tls13_record_layer_free() these could leak if SSL_shutdown() or tls_close() were called after closing the underlying socket(). * Free struct members in tls13_record_layer_free() in their natural order for reviewability. * Gracefully handle root certificates being both trusted and untrusted. * Handle X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE in the new verifier. * Use the legacy verifier when building auto chains for TLS. * Use consistent names in tls13_{client,server}_finished_{recv,send}(). * Add tls13_secret_{init,cleanup}() and use them throughout the TLSv1.3 code base. * Move the read MAC key into the TLSv1.2 record layer. * Make tls12_record_layer_free() NULL safe. * Search the intermediates only after searching the root certs in the new verifier to avoid problems with the legacy callback. * Bail out early after finding a single chain in the new verifier, if we have been called via the legacy verifier API. * Set (invalid and likely incomplete) chain on the xsc on chain build failure prior to calling the callback. This is required by various callers, including auto chain. * Align SSL_get_shared_ciphers() with OpenSSL. This takes into account that it never returned server ciphers, so now it will fail when called from the client side. * Add support for SSL_get_shared_ciphers() with TLSv1.3. * Split the record protection from the TLSv1.2 record layer. * Clean up sequence number handling in the new TLSv1.2 record layer. * Clean up sequence number handling in DTLS. * Clean up dtls1_reset_seq_numbers(). * Factor out code for explicit IV length, block size and MAC length from tls12_record_layer_open_record_protected_cipher(). * Provide record layer overhead for DTLS. * Provide functions to determine if TLSv1.2 record protection is engaged. * Add code to handle change of cipher state in the new TLSv1.2 record layer. * Mop up now unused dtls1_build_sequence_numbers() function. * Allow setting a keypair on a tls context without specifying the private key, and fake it internally in libtls. This removes the need for privsep engines like relayd to use bogus keys. * Skip the private key check for fake private keys. * Move the private key setup from tls_configure_ssl_keypair() to a helper function with proper error checking. * Change the internal tls_configure_ssl_keypair() function to return -1 instead of 1 on failure. * Move sequence numbers into the new TLSv1.2 record layer. * Move AEAD handling into the new TLSv1.2 record layer. * Remove direct assignment of aead_ctx to avoid a leak. * Add a number of RPKI OIDs from RFC 6482, 6484, 6493, 8182, 8360, draft-ietf-sidrops-rpki-rta, and draft-ietf-opsawg-finding-geofeeds. * Fail early in legacy exporter if the master secret is not available to avoid a segfault if it is called when the handshake is not completed. * Factor out legacy stack version checks. * Correct handshake MAC/PRF for various TLSv1.2 cipher suites which were originally added with the default handshake MAC and PRF rather than the SHA256 handshake MAC and PRF. * Absorb ssl3_get_algorithm2() into ssl_get_handshake_evp_md(). * Use dtls1_record_retrieve_buffered_record() to load buffered application data. * Enforce read ahead with DTLS. * Remove bogus DTLS checks that disabled ECC and OCSP. * Sync cert.pem with Mozilla NSS root CAs except "GeoTrust Global CA". * Only print the certificate file once on verification failure. * Pull in fix for EVP_CipherUpdate() overflow from OpenSSL. * Clean up and simplify dtls1_get_cipher(). * Group HelloVerifyRequest decoding and add missing check for trailing data. * Revise HelloVerifyRequest handling for DTLSv1.2. * Handle DTLS1_2_VERSION in various places. * Add DTLSv1.2 methods. * Make SSL{_CTX,}_get_{min,max}_proto_version() return a version of zero if the minimum or maximum has been set to zero to match OpenSSL's behavior. * Rename the "truncated" label into "decode_err" and the "f_err" label into "fatal_err". * Factor out and change some of the legacy client version code. * Simplify version checks in the TLSv1.3 client. Ensure that the server announced TLSv1.3 and nothing higher and check that the legacy_version is set to TLSv1.2 as required by RFC 8446. * Fix an off-by-one in x509_verify_set_xsc_chain() to make sure that the new validator checks for EXFLAG_CRITICAL in x509_vfy_check_chain_extension() for all untrusted certs in the chain. Take into account that the root is not necessarily trusted. * Avoid passing last and depth to x509_verify_cert_error() on ENOMEM. * Rename depth to num_untrusted. * Only use TLS versions internally rather than both TLS and DTLS versions since the latter are the one's complement of the human readable version numbers, which means that newer versions decrease in value. * Fix two bugs in the legacy verifier that resulted from refactoring of X509_verify_cert() for the new verifier: a return value was incorrectly treated as boolean, making it insufficient to decide whether validation should carry on or not. * Identify DTLS based on the version major value. * Move handling of cipher/hash based cipher suites into the new record layer. * Add tls12_record_protection_unused() and call it from CCS functions. * Move key/IV length checks closer to usage sites. Also add explicit checks against EVP_CIPHER_{iv,key}_length(). * Replace two handrolled tls12_record_protection_engaged(). * Improve internal version handling: add handshake fields for our minimum version, our maximum version and the TLS version negotiated during the handshake. Convert most of the internal code to use these version fields. * Guard against future internal use of TLS1_get_{client,}_version() macros. * Remove the internal ssl_downgrade_max_version() function which is no longer needed. * Fix checks for memory caps of constraints names. There are internal caps on the number of name constraints and other names, that the new name constraints code allocates per cert chain. These limits were checked too late, making them only partially effective. * Use EXFLAG_INVALID to handle out of memory and parse errors in x509v3_cache_extensions(). * Add support for DTLSv1.2 version handling. * Enable DTLSv1.2 support. * Add DTLSv1.2 support to openssl s_client/s_server. * Remove no longer needed read ahead workarounds in the s_client and s_server. * Fix a copy-paste error - skid was confused with an akid when checking for EXFLAG_INVALID. This broke OCSP validation with certain mirrors. * Make supported protocols and options for DHE params more prominent in tls_config_set_protocols.3. * Avoid a use-after-scope in tls13_cert_add(). * Split TLSv1.3 record protection from record layer. * Move the TLSv1.3 handshake struct inside the shared handshake struct. * Fully initialize rrec in tls12_record_layer_open_record_protected() to avoid confusing some static analyzers. * Use tls_set_errorx() on OCSP_basic_verify() failure since the latter does not set errno. * Convert openssl(1) x509 to new option handling and do the usual clean up that goes along with it. * Add SSL_HANDSHAKE_TLS12 for TLSv1.2 specific handshake data. * Rename new_cipher to cipher to align naming with keyblock or other parts of the handshake data. * Avoid mangled output in BIO_debug_callback(). * Fix client initiated renegotiation by replacing use of s->internal-type with s->server. * Move the TLSv1.2 record number increment into the new record layer. * Move finished and peer finished into the handshake struct. * Avoid transcript initialization when sending a TLS HelloRequest, fixing server initiated renegotiation. * Remove pointless assignment in SSL_get0_alpn_selected(). * Provide EVP_PKEY_new_CMAC_KEY(3). * Add missing prototype for d2i_DSAPrivateKey_fp(3) to x509.h. * Add DTLSv1.2 to openssl(1) s_server and s_client protocol message logging. * Avoid leaking param->name in x509_verify_param_zero(). * Avoid a leak in an error path in openssl(1) x509. * Add some error checking to openssl(1) x509. * When sending an alert in TLSv1.3, only set its error code when no other error was set previously. Certain clients rely on specific SSL_R_ error codes to identify that they are dealing with a self signed cert. * Switch to the legacy verifier for the stable release. * Provide SSL_use_certificate_chain_file(3). * Provide SSL_set_hostflags(3) and SSL_get0_peername(3). * Provide various DTLSv1.2 specific functions and defines. * Document meaning of '*' in the genrsa output. * Updated documentation for SSL_get_shared_ciphers(3). * Add documentation for SSL_get_finished(3). * Document EVP_PKEY_new_CMAC_key(3) * Document SSL_use_certificate_chain_file(3). * Document SSL_set_hostflags(3) and SSL_get0_peername(3). * Update SSL_get_version.3 manual for DTLSv.1.2 support. * Added '--enable-libtls-only' build option, which builds and installs a statically-linked libtls, skipping libcrypto and libssl. This is useful for systems that ship with OpenSSL but wish to also package libtls. 3.3.1 - Security fix * Malformed ASN.1 in a certificate revocation list or a timestamp response token can lead to a NULL pointer dereference. Bug fixes * Move point-on-curve check to set_affine_coordinates to avoid verifying ECDSA signatures with unchecked public keys. * Fix SSL_is_server() to behave as documented by re-introducing the client-specific methods. * Avoid undefined behavior due to memcpy(NULL, NULL, 0). * Mark a few more internal static tables const. 3.3.0 - Development release * Make openssl(1) s_server ignore -4 and -6 for compatibility with OpenSSL. * Further cleanup of the DTLS record handling. * Continue the replacement of the TLSv1.2 record layer by reimplementing the read side of the TLSv1.2 record handling. * Replace DTLSv1_enc_data() with TLSv1_1_enc_data(). * Merge d1_{clnt,srvr}.c into ssl_{clnt,srvr}.c. * When switching from the TLSv1.3 stack to the legacy stack include a TLS record header. This is necessary if there is more than one handshake message in the TLS plaintext record. * Set SO_REUSEADDR on the server socket in the openssl(1) ocsp command. * Fix resource handling on error in OCSP_request_add0_id(). * Add const to ssl_ciphers and tls1[23]_sigalgs* to push them into .data.rel.ro and .rodata, respectively. * Add a const qualifier to srtp_known_profiles. * Simplify TLS method by removing the client and server specific methods internally. * Avoid casting away const in ssl_ctx_make_profiles(). * Make sure there is enough room for stashing the handshake message when switching to the legacy TLS stack. * Avoid explicitly conditioning an assert on DTLS1_VERSION to make the assert work for newer DTLS versions. * Merge SSL_ENC_METHOD into SSL_METHOD_INTERNAL. * Send a host header with OCSP queries to make openssl(1) ocsp work with some widely used OCSP responders. * Fix a memory leak in the openssl(1) s_client. * Add a flag to mark DTLS methods as DTLS to have an easy way to recognize DTLS methods that avoids inspecting the version number. * Implement SSL_is_dtls() and use it internally in place of the SSL_IS_DTLS macro. * Unbreak DTLS retransmissions for flights that include a CCS. * Add ability to ocspcheck(8) to parse a port in the specified OCSP URL. * Refactor and clean up ocspcheck(8) and add regression tests. * If x509_verify() fails, ensure that the error is set on both the x509_verify_ctx() and its store context to make some failures visible from SSL_get_verify_result(). * Use the X509_STORE_CTX get_issuer() callback from the new X.509 verifier to fix hashed certificate directories. * Only check BIO_should_read() on read and BIO_should_write() on write. Previously, BIO_should_write() was also checked after read and BIO_should_read() after write which could cause stalls in software that uses the same BIO for read and write. * In openssl(1) verify, also check for error on the store context since the return value of X509_verify_cert() is unreliable in presence of a callback that returns 1 too often. * Update getentropy on Windows to use Cryptography Next Generation (CNG). wincrypt is deprecated and no longer works with newer Windows environments, such as in Windows Store apps. * Implement auto chain for the TLSv1.3 server since some software relies on this. * Handle additional certificate error cases in the new X.509 verifier. Keep track of the errors encountered if a verify callback tells the verifier to continue and report them back via the error on the store context. This mimics the behavior of the old verifier that would persist the first error encountered while building the chain. * Report specific failures for "self signed certificates" in a way compatible with the old verifier since software relies on the error code. * Implement key exporter for TLSv1.3. * Plug a large memory leak in the new verifier caused by calling X509_policy_check() repeatedly. * Avoid leaking memory in x509_verify_chain_dup(). * Various documentation improvements, particularly around TLS methods. 3.2.3 - Security fix * Malformed ASN.1 in a certificate revocation list or a timestamp response token can lead to a NULL pointer dereference. 3.2.2 - Stable release * This is the first stable release with the new TLSv1.3 implementation enabled by default for both client and server. The OpenSSL 1.1 TLSv1.3 API is not yet available and will be provided in an upcoming release. * New X509 certificate chain validator that correctly handles multiple paths through intermediate certificates. Loosely based on Go's X509 validator. * New name constraints verification implementation which passes the bettertls.com certificate validation check suite. * Improve the handling of BIO_read()/BIO_write() failures in the TLSv1.3 stack. * Start replacing the existing TLSv1.2 record layer. * Define OPENSSL_NO_SSL_TRACE in opensslfeatures.h. * Make SSL_CTX_get_ciphers(NULL) return NULL rather than crash. * Send alert on ssl_get_prev_session() failure. * Zero out variable on the stack to avoid leaving garbage in the tail of short session IDs. * Move state initialization from SSL_clear() to ssl3_clear() to ensure that it gets correctly reinitialized across a SSL_set_ssl_method() call. * Avoid an out-of-bounds write in BN_rand(). * Fix numerous leaks in the UI_dup_* functions. Simplify and tidy up the code in ui_lib.c. * Correctly track selected ALPN length to avoid a potential segmentation fault with SSL_get0_alpn_selected() when alpn_selected is NULL. * Include machine/endian.h gost2814789.c in order to pick up the __STRICT_ALIGNMENT define. * Simplify SSL method lookups. * Clean up and simplify SSL_get_ciphers(), SSL_set_session(), SSL_set_ssl_method() and several internal functions. * Correctly handle ssl_cert_dup() failure in SSL_set_SSL_CTX(). * Refactor dtls1_new(), dtls1_hm_fragment_new(), dtls1_drain_fragments(), dtls1_clear_queues(). * Copy the session ID directly in ssl_get_prev_session() instead of handing it through several functions for copying. * Clean up and refactor ssl_get_prev_session(); simplify tls_decrypt_ticket() and tls1_process_ticket() exit paths. * Avoid memset() before memcpy() in CBS_add_bytes(). * Rewrite X509_INFO_{new,free}() more idiomatically. * Remove unnecessary zeroing after recallocarray() in ASN1_BIT_STRING_set_bit(). * Convert openssl(1) ocsp new option handling. * Document SSL_set1_host(3), SSL_set_SSL_CTX(3). * Document return value from EC_KEY_get0_public_key(3). * Greatly expanded test coverage via the tlsfuzzer test scripts. * Expanded test coverage via the bettertls certificate test suite. * Test interoperability with the Botan TLS client. * Make pthread_mutex static initialisation work on Windows. * Get __STRICT_ALIGNMENT from machine/endian.h with portable build. 3.2.1 - Development release * Propagate alerts from the read half of the TLSv1.3 record layer to I/O functions. * Send a record overflow alert for TLSv1.3 messages having overlong plaintext or inner plaintext. * Send an illegal parameter alert if a client sends an invalid DH key share. * Document PKCS7_final(3), PKCS7_add_attribute(3). * Collapse x509v3 directory into x509. * Improve TLSv1.3 client certificate selection to allow EC certificates instead of only RSA certificates. * Fail on receiving an invalid NID in X509_ATTRIBUTE_create() instead of constructing a broken objects that may cause NULL pointer accesses. * Add support for additional GOST curves from RFC 7836 and draft-deremin-rfc4491-bis. * Add OIDs for HMAC using the Streebog hash function. * Allow GOST R 34.11-2012 in PBE/PBKDF2/PKCS#5. * Enable GOST_SIG_FORMAT_RS_LE when verifying certificate signatures. * Handle GOST in ssl_cert_dup(). * Stop sending GOST R 34.10-94 as a CertificateType. * Use IANA allocated GOST ClientCertificateTypes. * Add a custom copy handler for AES keywrap to fix a use-after-free. * Enforce in the TLSv1.3 server that that ClientHello messages after a HelloRetryRequest match the original ClientHello as per RFC 8446 section 4.1.2 * Document more PKCS7 attribute functions. * Document PKCS7_get_signer_info(3). * Document PEM_ASN1_read(3) and PEM_ASN1_read_bio(3). * Document PEM_def_callback(3). * Document EVP_read_pw_string_min(3). * Merge documentation of X509_get0_serialNumber from OpenSSL 1.1.1. * Document error handling of X509_PUBKEY_get0(3) and X509_PUBKEY_get(3) * Document X509_get0_pubkey_bitstr(3). * Fix an off-by-one in the CBC padding removal. From BoringSSL. * Enforce restrictions on extensions present in the ClientHello as per RFC 8446, section 9.2. * Add new CMAC_Init(3) and ChaCha(3) manual pages. * Fix SSL_shutdown behavior to match the legacy stack. The previous behavior could cause a hang. * Add initial support for openbsd/powerpc64. * Make the message type available in the internal TLS extensions API functions. * Enable TLSv1.3 for the generic TLS_method(). * Convert openssl(1) s_client option handling. * Document openssl(1) certhash. * Convert openssl(1) verify option handling. * Fix a longstanding bug in PEM_X509_INFO_read_bio(3) that could cause use-after-free and double-free issues in calling programs. * Document PEM_X509_INFO_read(3) and PEM_X509_INFO_read_bio(3). * Handle SSL_MODE_AUTO_RETRY being changed during a TLSv1.3 session. * Convert openssl(1) s_server option handling. * Add minimal info callback support for TLSv1.3. * Refactor, clean up and simplify some SSL3/DTLS1 record writing code. * Correctly handle server requests for an OCSP response. * Add the P-521 curve to the list of curves supported by default in the client. * Convert openssl(1) req option handling. * Avoid calling freezero with a negative size if a server sends a malformed plaintext of all zeroes. * Send an unexpected message alert if no valid content type is found in a TLSv1.3 record. 3.2.0 - Development release * Enable TLS 1.3 server side in addition to client by default. With this change TLS 1.3 is handled entirely on the new stack and state machine, with fallback to the legacy stack and state machine for older versions. Note that the OpenSSL TLS 1.3 API is not yet visible/available. * Improve length checks in the TLS 1.3 record layer and provide appropriate alerts for violations of record layer limits. * Enforce that SNI hostnames received by the TLS server are correctly formed as per RFC 5890 and RFC 6066, responding with illegal parameter for a nonconformant host name. * Support SSL_MODE_AUTO_RETRY in TLS 1.3 to allow the automatic retry of handshake messages. * Modify I/O behavior so that SSL_MODE_AUTO_RETRY is the default similar to new OpenSSL releases. * Modify openssl(1) to clear SSL_MODE_AUTO_RETRY appropriately in various commands. * Add tlsfuzzer based regression tests. * Support sending certificate status requests from the TLS 1.3 client to request OCSP staples for leaf certificates. * Support sending certificate status replies from the TLS 1.3 server in order to send OCSP staples for leaf certificates. * Send correct alerts when handling failed key share extensions on the TLS 1.3 server. * Various compatibility fixes for TLS 1.3 to 1.2 fallback for switching from the new to legacy stacks. * Support TLS 1.3 options in the openssl(1) command. * Many alert cleanups in TLS 1.3 to provide expected alerts in failure conditions. * Modify "openssl x509" to display invalid certificate times as invalid, and correctly deal with the failing return case from X509_cmp_time so that a certificate with an invalid NotAfter does not appear valid. * Support sending dummy change_cipher_spec records for TLS 1.3 middlebox compatibility. * Ensure only PSS signatures are used with RSA in TLS 1.3. * Ensure that TLS 1.3 clients advertise exactly the "null" compression method in its legacy_compression_methods. * Correct use of sockaddr_storage instead of sockaddr in openssl(1) s_client, which could lead to using 14 bytes of stack garbage instead of an IPv6 address in DTLS mode. * Use non-expired certificates first when building a certificate chain. 3.1.5 - Security fix * Malformed ASN.1 in a certificate revocation list or a timestamp response token can lead to a NULL pointer dereference. 3.1.4 - Interoperability and bug fixes for the TLSv1.3 client: * Improve client certificate selection to allow EC certificates instead of only RSA certificates. * Do not error out if a TLSv1.3 server requests an OCSP response as part of a certificate request. * Fix SSL_shutdown behavior to match the legacy stack. The previous behaviour could cause a hang. * Fix a memory leak and add a missing error check in the handling of the key update message. * Fix a memory leak in tls13_record_layer_set_traffic_key. * Avoid calling freezero with a negative size if a server sends a malformed plaintext of all zeroes. * Ensure that only PSS may be used with RSA in TLSv1.3 in order to avoid using PKCS1-based signatures. * Add the P-521 curve to the list of curves supported by default in the client. 3.1.3 - Bug fix * libcrypto may fail to build a valid certificate chain due to expired untrusted issuer certificates. 3.1.2 - Bug fix * A TLS client with peer verification disabled may crash when contacting a server that sends an empty certificate list. 3.1.1 - Stable release * Improved cipher suite handling to automatically include TLSv1.3 cipher suites when they are not explicitly referred to in the cipher string. * Improved handling of TLSv1.3 HelloRetryRequests, simplifying state transitions and ensuring that the legacy session identifer retains the same value across the handshake. * Provided TLSv1.3 cipher suite aliases to match the names used in RFC 8446. * Improved TLSv1.3 client key share handling to allow the use of any groups in our configured NID list. * Fixed printing the serialNumber with X509_print_ex() fall back to the colon separated hex bytes in case greater than int value. * Fix to disallow setting the AES-GCM IV length to zero. * Added -groups option to openssl(1) s_server subcommand. * Fix to show TLSv1.3 extension types with openssl(1) -tlsextdebug. * Improved portable builds to support the use of static MSVC runtimes. * Fixed portable builds to avoid exporting a sleep() symbol. 3.1.0 - Development release * Completed initial TLS 1.3 implementation with a completely new state machine and record layer. TLS 1.3 is now enabled by default for the client side, with the server side to be enabled in a future release. Note that the OpenSSL TLS 1.3 API is not yet visible/available. * Many more code cleanups, fixes, and improvements to memory handling and protocol parsing. * Added RSA-PSS and RSA-OAEP methods from OpenSSL 1.1.1. * Ported Cryptographic Message Syntax (CMS) implementation from OpenSSL 1.1.1 and enabled by default. * Improved compatibility by backporting functionality and documentation from OpenSSL 1.1.1. * Added many new additional crypto test vectors. * Adjusted EVP_chacha20()'s behavior to match OpenSSL's semantics. * Default CA bundle location is now configurable in portable builds. * Added cms subcommand to openssl(1). * Added -addext option to openssl(1) req subcommand. 3.0.2 - Stable release * Use a valid curve when constructing an EC_KEY that looks like X25519. The recent EC group cofactor change results in stricter validation, which causes the EC_GROUP_set_generator() call to fail. Issue reported and fix tested by rsadowski@ * Fixed a padding oracle in PKCS7_dataDecode and CMS_decrypt_set1_pkey. (Note that the CMS code is currently disabled) Port of Edlinger's Fix for CVE-2019-1563 from OpenSSL 1.1.1 (old license) * Avoid a path traversal bug in s_server on Windows when run with the -WWW or -HTTP options, due to incomplete path check logic. Issue reported and fix tested by Jobert Abma 3.0.1 - Development release * Ported Billy Brumley's fix for CVE-2019-1547 in OpenSSL 1.1.1. If a NULL or zero cofactor is passed to EC_GROUP_set_generator(), try to compute it using Hasse's bound. This works as long as the cofactor is small enough. * Fixed a memory leak in error paths for eckey_type2param(). * Initial work on supporting Cryptographic Message Syntax (CMS) in libcrypto (not enabled). * Various manual page improvements and additions. * Added a CMake check for an existing uninstall target, facilitating embedding LibreSSL in larger CMake projects, from Matthew Albrecht. 3.0.0 - Development release * Completed the port of RSA_METHOD accessors from the OpenSSL 1.1 API. * Documented undescribed options and removed unfunctional options description in openssl(1) manual. * A plethora of small fixes due to regular oss-fuzz testing. * Various side channels in DSA and ECDSA were addressed. These are some of the many issues found in an extensive systematic analysis of bignum usage by Samuel Weiser, David Schrammel et al. * Enabled openssl(1) speed subcommand on Windows platform. * Enabled performance optimizations when building with Visual Studio on Windows. * Fixed incorrect carry operation in 512 addition for Streebog. * Fixed -modulus option with openssl(1) dsa subcommand. * Fixed PVK format output issue with openssl(1) dsa and rsa subcommand. 2.9.2 - Bug fixes * Fixed portable builds with older versions of MacOS, Android targets < API 21, and Solaris 10 * Fixed SRTP profile advertisement for DTLS servers. 2.9.1 - Stable release * Added support for XChaCha20 and XChaCha20-Poly1305. * Added support for AES key wrap constructions via the EVP interface. * Partial port of the OpenSSL EC_KEY_METHOD API for use by OpenSSH. * Added pbkdf2 key derivation support to openssl(1) * Removed SHA224 based handshake signatures from consideration for use in a TLS 1.2 handshake. * Changed the default digest type of openssl(1) enc to to sha256. * Changed the default digest type of openssl(1) dgst to sha256. * Changed the default digest type of openssl(1) x509 -fingerprint to sha256. * Changed the default digest type of openssl(1) crl -fingerprint to sha256. * Improved Windows, Android, and ARM compatibility, including assembly optimizations on Mingw-w64 targets. 2.9.0 - Development release * Added the SM4 block cipher from the Chinese standard GB/T 32907-2016. * Fixed warnings about clock_gettime on Windows Visual Studio builds. * Fixed CMake builds on systems where getpagesize is defined as an inline function. * CRYPTO_LOCK is now automatically initialized, with the legacy callbacks stubbed for compatibility. * Added the SM3 hash function from the Chinese standard GB/T 32905-2016. * Added more OPENSSL_NO_* macros for compatibility with OpenSSL. * Added extensive interoperability tests between LibreSSL and OpenSSL 1.0 and 1.1. * Added additional Wycheproof tests and related bug fixes. * Simplified sigalgs option processing and handshake signing algorithm * Added the ability to use the RSA PSS algorithm for handshake signatures. * Added bn_rand_interval() and use it in code needing ranges of random bn values. * Added functionality to derive early, handshake, and application secrets as per RFC8446. * Added handshake state machine from RFC8446. * Removed some ASN.1 related code from libcrypto that had not been used since around 2000. * Unexported internal symbols and internalized more record layer structs. * Added support for assembly optimizations on 32-bit ARM ELF targets. * Improved protection against timing side channels in ECDSA signature generation. * Coordinate blinding was added to some elliptic curves. This is the last bit of the work by Brumley et al. to protect against the Portsmash vulnerability. * Ensure transcript handshake is always freed with TLS 1.2. 2.8.2 - Stable release * Added Wycheproof support for ECDH and ECDSA Web Crypto test vectors, along with test harness fixes. * Fixed memory leak in nc(1) 2.8.1 - Test and compatibility improvements * Added Wycheproof support for ECDH, RSASSA-PSS, AES-GCM, AES-CMAC, AES-CCM, AES-CBC-PKCS5, DSA, ChaCha20-Poly1305, ECDSA, and X25519 test vectors. Applied appropriate fixes for errors uncovered by tests. * Simplified key exchange signature generation and verification. * Fixed a one-byte buffer overrun in callers of EVP_read_pw_string * Converted more code paths to use CBB/CBS. All handshake messages are now created by CBB. * Fixed various memory leaks found by Coverity. * Simplified session ticket parsing and handling, inspired by BoringSSL. * Modified signature of CRYPTO_mem_leaks_* to return -1. This function is a no-op in LibreSSL, so this function returns an error to not indicate the (non-)existence of memory leaks. * SSL_copy_session_id, PEM_Sign, EVP_EncodeUpdate, BIO_set_cipher, X509_OBJECT_up_ref_count now return an int for error handling, matching OpenSSL. * Converted a number of #defines into proper functions, matching OpenSSL's ABI. * Added X509_get0_serialNumber from OpenSSL. * Removed EVP_PKEY2PKCS8_broken and PKCS8_set_broken, while adding PKCS8_pkey_add1_attr_by_NID and PKCS8_pkey_get0_attrs, matching OpenSSL. * Removed broken pkcs8 formats from openssl(1). * Converted more functions in public API to use const arguments. * Stopped handing AES-GCM in ssl_cipher_get_evp, since they use the EVP_AEAD interface. * Stopped using composite EVP_CIPHER AEADs. * Added timing-safe compares for checking results of signature verification. There are no known attacks, this is just inexpensive prudence. * Correctly clear the current cipher state, when changing cipher state. This fixed an issue where renegotiation of cipher suites would fail when switched from AEAD to non-AEAD or vice-versa. Issue reported by Bernard Spil. * Added more cipher tests to appstest.sh, including all TLSv1.2 ciphers. * Added RSA_meth_get_finish() RSA_meth_set1_name() from OpenSSL. * Added new EVP_CIPHER_CTX_(get|set)_iv() API that allows the IV to be retrieved and set with appropriate validation. 2.8.0 - Bug fixes, security, and compatibility improvements * Extensive documentation updates and additional API history. * Fixed a pair of 20+ year-old bugs in X509_NAME_add_entry * Tighten up checks for various X509_VERIFY_PARAM functions, 'poisoning' parameters so that an unverified certificate cannot be used if it fails verification. * Fixed a potential memory leak on failure in ASN1_item_digest * Fixed a potential memory alignment crash in asn1_item_combine_free * Removed unused SSL3_FLAGS_DELAY_CLIENT_FINISHED and SSL3_FLAGS_POP_BUFFER flags in write path, simplifying IO paths. * Removed SSL_OP_TLS_ROLLBACK_BUG buggy client workarounds. * Made ENGINE_finish and ENGINE_free succeed on NULL and simplify callers and matching OpenSSL behavior, rewrote ENGINE_* documentation. * Added const annotations to many existing APIs from OpenSSL, making interoperability easier for downstream applications. * Fixed small timing side-channels in ecdsa_sign_setup and dsa_sign_setup. * Documented security pitfalls with BN_FLG_CONSTTIME and constant-time operation of BN_* functions. * Updated BN_clear to use explicit_bzero. * Added a missing bounds check in c2i_ASN1_BIT_STRING. * More CBS conversions, including simplifications to RSA key exchange, and converted code to use dedicated buffers for secrets. * Removed three remaining single DES cipher suites. * Fixed a potential leak/incorrect return value in DSA signature generation. * Added a blinding value when generating DSA and ECDSA signatures, in order to reduce the possibility of a side-channel attack leaking the private key. * Added ECC constant time scalar multiplication support. From Billy Brumley and his team at Tampere University of Technology. * Revised the implementation of RSASSA-PKCS1-v1_5 to match the specification in RFC 8017. Based on an OpenSSL commit by David Benjamin. * Cleaned up BN_* implementations following changes made in OpenSSL by Davide Galassi and others. 2.7.4 - Security fixes * Avoid a timing side-channel leak when generating DSA and ECDSA signatures. This is caused by an attempt to do fast modular arithmetic, which introduces branches that leak information regarding secret values. Issue identified and reported by Keegan Ryan of NCC Group. * Reject excessively large primes in DH key generation. Problem reported by Guido Vranken to OpenSSL (https://github.com/openssl/openssl/pull/6457) and based on his diff. 2.7.3 - Bug fixes * Removed incorrect NULL checks in DH_set0_key(). Reported by Ondrej Sury * Fixed an issue normalizing CPU architecture in the configure script, which disabled assembly optimizations on platforms that get detected as 'amd64', opposed to 'x86_64' * Limited tls_config_clear_keys() to only clear private keys. This was inadvertently clearing the keypair, which includes the OCSP staple and pubkey hash - if an application called tls_configure() followed by tls_config_clear_keys(), this would prevent OCSP staples from working. 2.7.2 - Stable release * Updated and added extensive new HISTORY sections to API manuals. * Added support for shared library builds with CMake on all supported platforms. Note that some of the CMake options have changed, consult the README for details. 2.7.1 - Bug fixes * Fixed a bug in int_x509_param_set_hosts, calling strlen() if name length provided is 0 to match the OpenSSL behaviour. Issue noticed by Christian Heimes . * Fixed builds macOS 10.11 and older. 2.7.0 - Bug fixes and improvements * Added support for many OpenSSL 1.0.2 and 1.1 APIs, based on observations of real-world usage in applications. These are implemented in parallel with existing OpenSSL 1.0.1 APIs - visibility changes have not been made to existing structs, allowing code written for older OpenSSL APIs to continue working. * Extensive corrections, improvements, and additions to the API documentation, including new public APIs from OpenSSL that had no pre-existing documentation. * Added support for automatic library initialization in libcrypto, libssl, and libtls. Support for pthread_once or a compatible equivalent is now required of the target operating system. As a side-effect, minimum Windows support is Vista or higher. * Converted more packet handling methods to CBB, which improves resiliency when generating TLS messages. * Completed TLS extension handling rewrite, improving consistency of checks for malformed and duplicate extensions. * Rewrote ASN1_TYPE_{get,set}_octetstring() using templated ASN.1. This removes the last remaining use of the old M_ASN1_* macros (asn1_mac.h) from API that needs to continue to exist. * Added support for client-side session resumption in libtls. A libtls client can specify a session file descriptor (a regular file with appropriate ownership and permissions) and libtls will manage reading and writing of session data across TLS handshakes. * Improved support for strict alignment on ARMv7 architectures, conditionally enabling assembly in those cases. * Fixed a memory leak in libtls when reusing a tls_config. * Merged more DTLS support into the regular TLS code path, removing duplicated code. * Many improvements to Windows Cmake-based builds and tests, especially when targeting Visual Studio. 2.6.4 - Bug fixes * Make tls_config_parse_protocols() work correctly when passed a NULL pointer for a protocol string. Issue found by semarie@, who also provided the diff. * Correct TLS extensions handling when no extensions are present. If no TLS extensions are present in a client hello or server hello, omit the entire extensions block, rather than including it with a length of zero. Thanks to Eric Elena for providing packet captures and testing the fix. * Fixed portable builds on older Android systems, and systems with out IPV6_TCLASS support. 2.6.3 - OpenBSD 6.2 Release * No core changes from LibreSSL 2.6.2 * Minor compatibility fixes in portable version. 2.6.2 - Bug fixes * Provide a useful error with libtls if there are no OCSP URLs in a peer certificate. * Keep track of which keypair is in use by a TLS context, fixing a bug where a TLS server with SNI would only return the OCSP staple for the default keypair. Issue reported by William Graeber and confirmed by Andreas Bartelt. * Fixed various issues in the OCSP extension parsing code. The original code incorrectly passes the pointer allocated via CBS_stow() (using malloc()) to a d2i_*() function and then calls free() on the now incremented pointer, most likely resulting in a crash. This issue was reported by Robert Swiecki who found the issue using honggfuzz. * If tls_config_parse_protocols() is called with a NULL pointer, return the default protocols instead of crashing - this makes the behaviour more useful and mirrors what we already do in tls_config_set_ciphers() et al. 2.6.1 - Code removal, rewrites * Added a "-T tlscompat" option to nc(1), which enables the use of all TLS protocols and "compat" ciphers. This allows for TLS connections to TLS servers that are using less than ideal cipher suites, without having to resort to "-T tlsall" which enables all known cipher suites. Diff from Kyle J. McKay. * Added a new TLS extension handling framework, somewhat analogous to BoringSSL, and converted all TLS extensions to use it. Added new TLS extension regression tests. * Improved and added many new manpages. Updated *check_private_key manpages with additional cautions regarding their use. * Cleaned up the EC key/curve configuration handling. * Added tls_config_set_ecdhecurves() to libtls, which allows the names of the eliptical curves that may be used during client and server key exchange to be specified. * Converted more code paths to use CBB/CBS. * Removed support for DSS/DSA, since we removed the cipher suites a while back. * Removed NPN support. NPN was never standardised and the last draft expired in October 2012. ALPN was standardised in July 2014 and has been supported in LibreSSL since December 2014. NPN has also been removed from Chromium in May 2016. * Removed SSL_OP_CRYPTOPRO_TLSEXT_BUG workaround for old/broken CryptoPro clients. * Removed support for the TLS padding extension, which was added as a workaround for an old bug in F5's TLS termination. * Worked around another bug in F5's TLS termination handling of the elliptical curves extension. RFC 4492 only defines elliptic_curves for ClientHello. However, F5 is sending it in ServerHello. We need to skip over it since our TLS extension parsing code is now more strict. Thanks to Armin Wolfermann and WJ Liu for reporting. * Added ability to clamp notafter valies in certificates for systems with 32-bit time_t. This is necessary to conform to RFC 5280 4.1.2.5. * Implemented the SSL_CTX_set_min_proto_version(3) API. * Removed the original (pre-IETF) chacha20-poly1305 cipher suites. * Reclassified ECDHE-RSA-DES-CBC3-SHA from HIGH to MEDIUM. 2.6.0 - New APIs, bug fixes and improvements * Added support for providing CRLs to libtls. Once a CRL is provided we enable CRL checking for the full certificate chain. Based on a diff from Jack Burton * Allow non-compliant clients using IP literal addresses with SNI to connect to a server using libtls. * Avoid a potential NULL pointer dereference in d2i_ECPrivateKey(). Reported by Robert Swiecki, who found the issue using honggfuzz. * Added definitions for three OIDs used in EV certificates. From Kyle J. McKay * Added tls_peer_cert_chain_pem to libtls, useful in private certificate validation callbacks such as those in relayd. * Converted explicit clear/free sequences to use freezero(3). * Reworked TLS certificate name verification code to more strictly follow RFC 6125. * Cleaned up and simplified server key exchange EC point handling. * Added tls_keypair_clear_key for clearing key material. * Removed inconsistent IPv6 handling from BIO_get_accept_socket, simplified BIO_get_host_ip and BIO_accept. * Fixed the openssl(1) ca command so that is generates certificates with RFC 5280-conformant time. Problem noticed by Harald Dunkel. * Added ASN1_TIME_set_tm to set an asn1 from a struct tm * * Added SSL{,_CTX}_set_{min,max}_proto_version() functions. * Added HKDF (HMAC Key Derivation Function) from BoringSSL * Provided a tls_unload_file() function that frees the memory returned from a tls_load_file() call, ensuring that it the contents become inaccessible. This is specifically needed on platforms where the library allocators may be different from the application allocator. * Perform reference counting for tls_config. This allows tls_config_free() to be called as soon as it has been passed to the final tls_configure() call, simplifying lifetime tracking for the application. * Moved internal state of SSL and other structures to be opaque. * Dropped cipher suites with DSS authentication. * nc(1) improvements, including: nc -W to terminate nc after receiving a number of packets nc -Z for saving the peer certificate and chain in a pem file 2.5.5 - Bug fixes * Distinguish between self-issued certificates and self-signed certificates. The certificate verification code has special cases for self-signed certificates and without this change, self-issued certificates (which it seems are common place with openvpn/easyrsa) were also being included in this category. * Added getpagesize fallback, needed for Android bionic libc. 2.5.4 - Security Updates * Revert a previous change that forced consistency between return value and error code when specifing a certificate verification callback, since this breaks the documented API. When a user supplied callback always returns 1, and later code checks the error code to potentially abort post verification, this will result in incorrect successul certificate verification. * Switched Linux getrandom() usage to non-blocking mode, continuing to use fallback mechanims if unsuccessful. This works around a design flaw in Linux getrandom(2) where early boot usage in a library makes it impossible to recover if getrandom(2) is not yet initialized. * Fixed a bug caused by the return value being set early to signal successful DTLS cookie validation. This can mask a later failure and result in a positive return value being returned from ssl3_get_client_hello(), when it should return a negative value to propagate the error. * Fixed a build error on non-x86/x86_64 systems running Solaris. 2.5.3 - OpenBSD 6.1 Release * Documentation updates * Improved ocspcheck(1) error handling 2.5.2 - Security features and bugfixes * Added the recallocarray(3) memory allocation function, and converted various places in the library to use it, such as CBB and BUF_MEM_grow. recallocarray(3) is similar to reallocarray. Newly allocated memory is cleared similar to calloc(3). Memory that becomes unallocated while shrinking or moving existing allocations is explicitly discarded by unmapping or clearing to 0 * Added new root CAs from SECOM Trust Systems / Security Communication of Japan. * Added EVP interface for MD5+SHA1 hashes. * Fixed DTLS client failures when the server sends a certificate request. * Correct handling of padding when upgrading an SSLv2 challenge into an SSLv3/TLS connection. * Allow protocols and ciphers to be set on a TLS config object in libtls. * Improved nc(1) TLS handshake CPU usage and server-side error reporting. 2.5.1 - Bug and security fixes, new features, documentation updates * X509_cmp_time() now passes a malformed GeneralizedTime field as an error. Reported by Theofilos Petsios. * Detect zero-length encrypted session data early, instead of when malloc(0) fails or the HMAC check fails. Noted independently by jsing@ and Kurt Cancemi. * Check for and handle failure of HMAC_{Update,Final} or EVP_DecryptUpdate(). * Massive update and normalization of manpages, conversion to mandoc format. Many pages were rewritten for clarity and accuracy. Portable doc links are up-to-date with a new conversion tool. * Curve25519 Key Exchange support. * Support for alternate chains for certificate verification. * Code cleanups, CBS conversions, further unification of DTLS/SSL handshake code, further ASN1 macro expansion and removal. * Private symbol are now hidden in libssl and libcryto. * Friendly certificate verification error messages in libtls, peer verification is now always enabled. * Added OCSP stapling support to libtls and netcat. * Added ocspcheck utility to validate a certificate against its OCSP responder and save the reply for stapling * Enhanced regression tests and error handling for libtls. * Added explicit constant and non-constant time BN functions, defaulting to constant time wherever possible. * Moved many leaked implementation details in public structs behind opaque pointers. * Added ticket support to libtls. * Added support for setting the supported EC curves via SSL{_CTX}_set1_groups{_list}() - also provide defines for the previous SSL{_CTX}_set1_curves{_list} names. This also changes the default list of curves to be X25519, P-256 and P-384. All other curves must be manually enabled. * Added -groups option to openssl(1) s_client for specifying the curves to be used in a colon-separated list. * Merged client/server version negotiation code paths into one, reducing much duplicate code. * Removed error function codes from libssl and libcrypto. * Fixed an issue where a truncated packet could crash via an OOB read. * Added SSL_OP_NO_CLIENT_RENEGOTIATION option that disallows client-initiated renegotiation. This is the default for libtls servers. * Avoid a side-channel cache-timing attack that can leak the ECDSA private keys when signing. This is due to BN_mod_inverse() being used without the constant time flag being set. Reported by Cesar Pereida Garcia and Billy Brumley (Tampere University of Technology). The fix was developed by Cesar Pereida Garcia. * iOS and MacOS compatibility updates from Simone Basso and Jacob Berkman. 2.5.0 - New APIs, bug fixes and improvements * libtls now supports ALPN and SNI * libtls adds a new callback interface for integrating custom IO functions. Thanks to Tobias Pape. * libtls now handles 4 cipher suite groups: "secure" (TLSv1.2+AEAD+PFS) "compat" (HIGH:!aNULL) "legacy" (HIGH:MEDIUM:!aNULL) "insecure" (ALL:!aNULL:!eNULL) This allows for flexibility and finer grained control, rather than having two extremes (an issue raised by Marko Kreen some time ago). * Tightened error handling for tls_config_set_ciphers(). * libtls now always loads CA, key and certificate files at the time the configuration function is called. This simplifies code and results in a single memory based code path being used to provide data to libssl. * Add support for OCSP intermediate certificates. * Added functions used by stunnel and exim from BoringSSL - this brings in X509_check_host, X509_check_email, X509_check_ip, and X509_check_ip_asc. * Added initial support for iOS, thanks to Jacob Berkman. * Improved behavior of arc4random on Windows when using memory leak analysis software. * Correctly handle an EOF that occurs prior to the TLS handshake completing. Reported by Vasily Kolobkov, based on a diff from Marko Kreen. * Limit the support of the "backward compatible" ssl2 handshake to only be used if TLS 1.0 is enabled. * Fix incorrect results in certain cases on 64-bit systems when BN_mod_word() can return incorrect results. BN_mod_word() now can return an error condition. Thanks to Brian Smith. * Added constant-time updates to address CVE-2016-0702 * Fixed undefined behavior in BN_GF2m_mod_arr() * Removed unused Cryptographic Message Support (CMS) * More conversions of long long idioms to time_t * Improved compatibility by avoiding printing NULL strings with printf. * Reverted change that cleans up the EVP cipher context in EVP_EncryptFinal() and EVP_DecryptFinal(). Some software relies on the previous behaviour. * Avoid unbounded memory growth in libssl, which can be triggered by a TLS client repeatedly renegotiating and sending OCSP Status Request TLS extensions. * Avoid falling back to a weak digest for (EC)DH when using SNI with libssl. 2.4.2 - Bug fixes and improvements * Fixed loading default certificate locations with openssl s_client. * Ensured OCSP only uses and compares GENERALIZEDTIME values as per RFC6960. Also added fixes for OCSP to work with intermediate certificates provided in responses. * Improved behavior of arc4random on Windows to not appear to leak memory in debug tools, reduced privileges of allocated memory. * Fixed incorrect results from BN_mod_word() when the modulus is too large, thanks to Brian Smith from BoringSSL. * Correctly handle an EOF prior to completing the TLS handshake in libtls. * Improved libtls ceritificate loading and cipher string validation. * Updated libtls cipher group suites into four categories: "secure" (TLSv1.2+AEAD+PFS) "compat" (HIGH:!aNULL) "legacy" (HIGH:MEDIUM:!aNULL) "insecure" (ALL:!aNULL:!eNULL) This allows for flexibility and finer grained control, rather than having two extremes. * Limited support for 'backward compatible' SSLv2 handshake packets to when TLS 1.0 is enabled, providing more restricted compatibility with TLS 1.0 clients. * openssl(1) and other documentation improvements. * Removed flags for disabling constant-time operations. This removes support for DSA_FLAG_NO_EXP_CONSTTIME, DH_FLAG_NO_EXP_CONSTTIME, and RSA_FLAG_NO_CONSTTIME flags, making all of these operations unconditionally constant-time. 2.4.1 - Security fix * Correct a problem that prevents the DSA signing algorithm from running in constant time even if the flag BN_FLG_CONSTTIME is set. This issue was reported by Cesar Pereida (Aalto University), Billy Brumley (Tampere University of Technology), and Yuval Yarom (The University of Adelaide and NICTA). The fix was developed by Cesar Pereida. 2.4.0 - Build improvements, new features * Many improvements to the CMake build infrastructure, including Solaris, mingw-w64, Cygwin, and HP-UX support. Thanks to Kinichiro Inoguchi for this work. * Added missing error handling around bn_wexpand() calls. * Added explicit_bzero calls for freed ASN.1 objects. * Fixed X509_*set_object functions to return 0 on allocation failure. * Implemented the IETF ChaCha20-Poly1305 cipher suites. * Changed default EVP_aead_chacha20_poly1305() implementation to the IETF version, which is now the default. * Fixed password prompts from openssl(1) to properly handle ^C. * Reworked error handling in libtls so that configuration errors are visible. * Deprecated internal use of EVP_[Cipher|Encrypt|Decrypt]_Final. * Manpage fixes and updates 2.3.5 - Reliability fix * Fixed an error in libcrypto when parsing some ASN.1 elements > 16k. 2.3.4 - Security Update * Fix multiple vulnerabilities in libcrypto relating to ASN.1 and encoding. From OpenSSL. * Minor build fixes 2.3.3 - OpenBSD 5.9 release branch tagged * Reworked build scripts to better sync with OpenNTPD-portable * Fixed broken manpage links * Fixed an nginx compatibility issue by adding an 'install_sw' make alias * Fixed HP-UX builds * Changed the default configuration directory to c:\LibreSSL\ssl on Windows binary builds * cert.pem has been reorganized and synced with Mozilla's certificate store 2.3.2 - Compatibility and Reliability fixes * Changed format of LIBRESSL_VERSION_NUMBER to match that of OPENSSL_VERSION_NUMBER, see: https://wiki.openssl.org/index.php/Manual:OPENSSL_VERSION_NUMBER(3) * Added EVP_aead_chacha20_poly1305_ietf() which matches the AEAD construction introduced in RFC 7539, which is different than that already used in TLS with EVP_aead_chacha20_poly1305() * Avoid a potential undefined C99+ behavior due to shift overflow in AES_decrypt, reported by Pascal Cuoq * More man pages converted from pod to mdoc format * Added COMODO RSA Certification Authority and QuoVadis root certificates to cert.pem * Removed Remove "C=US, O=VeriSign, Inc., OU=Class 3 Public Primary Certification Authority" (serial 3c:91:31:cb:1f:f6:d0:1b:0e:9a:b8:d0:44:bf:12:be) root certificate from cert.pem * Added support for building nc(1) on Solaris * Fixed GCC 5.x+ preprocessor checks, reported by Ruslan Babayev * Improved console handling with openssl(1) on Windows * Ensure the network stack is enabled on Windows when running tls_init() * Fixed incorrect TLS certificate loading by nc(1) * Added support for Solaris 11.3's getentropy(2) system call * Enabled support for using NetBSD 7.0's arc4random(3) implementation * Deprecated the SSL_OP_SINGLE_DH_USE flag by disabling its effect * Fixes from OpenSSL 1.0.1q - CVE-2015-3194 - NULL pointer dereference in client side certificate validation. - CVE-2015-3195 - Memory leak in PKCS7 - not reachable from TLS/SSL * The following OpenSSL CVEs did not apply to LibreSSL - CVE-2015-3193 - Carry propagating bug in the x86_64 Montgomery squaring procedure. - CVE-2015-3196 - Double free race condition of the identify hint data. See https://marc.info/?l=openbsd-announce&m=144925068504102 2.3.1 - ASN.1 and time handling cleanups * ASN.1 cleanups and RFC5280 compliance fixes. * Time representations switched from 'unsigned long' to 'time_t'. LibreSSL now checks if the host OS supports 64-bit time_t. * Fixed a leak in SSL_new in the error path. * Support always extracting the peer cipher and version with libtls. * Added ability to check certificate validity times with libtls, tls_peer_cert_notbefore and tls_peer_cert_notafter. * Changed tls_connect_servername to use the first address that resolves with getaddrinfo(). * Remove broken conditional EVP_CHECK_DES_KEY code (non-functional since initial commit in 2004). * Fixed a memory leak and out-of-bounds access in OBJ_obj2txt, reported by Qualys Security. * Fixed an up-to 7 byte overflow in RC4 when len is not a multiple of sizeof(RC4_CHUNK), reported by Pascal Cuoq . * Reject too small bits value in BN_generate_prime_ex(), so that it does not risk becoming negative in probable_prime_dh_safe(), reported by Franck Denis. * Enable nc(1) builds on more platforms. 2.3.0 - SSLv3 removed, libtls API changes, portability improvements * SSLv3 is now permanently removed from the tree. * The libtls API is changed from the 2.2.x series. The read/write functions work correctly with external event libraries. See the tls_init man page for examples of using libtls correctly in asynchronous mode. Client-side verification is now supported, with the client supplying the certificate to the server. Also, when using tls_connect_fds, tls_connect_socket or tls_accept_fds, libtls no longer implicitly closes the passed in sockets. The caller is responsible for closing them in this case. * When loading a DSA key from an raw (without DH parameters) ASN.1 serialization, perform some consistency checks on its `p' and `q' values, and return an error if the checks failed. Thanks for Georgi Guninski (guninski at guninski dot com) for mentioning the possibility of a weak (non prime) q value and providing a test case. See https://cpunks.org/pipermail/cypherpunks/2015-September/009007.html for a longer discussion. * Fixed a bug in ECDH_compute_key that can lead to silent truncation of the result key without error. A coding error could cause software to use much shorter keys than intended. * Removed support for DTLS_BAD_VER. Pre-DTLSv1 implementations are no longer supported. * The engine command and parameters are removed from the openssl(1). Previous releases removed dynamic and builtin engine support already. * SHA-0 is removed, which was withdrawn shortly after publication 20 years ago. * Added Certplus CA root certificate to the default cert.pem file. * New interface OPENSSL_cpu_caps is provided that does not allow software to inadvertently modify cpu capability flags. OPENSSL_ia32cap and OPENSSL_ia32cap_loc are removed. * The out_len argument of AEAD changed from ssize_t to size_t. * Deduplicated DTLS code, sharing bugfixes and improvements with TLS. * Converted 'nc' to use libtls for client and server operations; it is included in the libressl-portable distribution as an example of how to use the library. 2.2.3 - Bug fixes, build enhancements * LibreSSL 2.2.2 incorrectly handles ClientHello messages that do not include TLS extensions, resulting in such handshakes being aborted. This release corrects the handling of such messages. Thanks to Ligushka from github for reporting the issue. * Added install target for cmake builds. Thanks to TheNietsnie from github. * Updated pkgconfig files to correctly report the release version number, not the individual library ABI version numbers. Thanks to Jan Engelhardt for reporting the issue. 2.2.2 - More TLS parser rework, bug fixes, expanded portable build support * Switched 'openssl dhparam' default from 512 to 2048 bits * Reworked openssl(1) option handling * More CRYPTO ByteString (CBC) packet parsing conversions * Fixed 'openssl pkeyutl -verify' to exit with a 0 on success * Fixed dozens of Coverity issues including dead code, memory leaks, logic errors and more. * Ensure that openssl(1) restores terminal echo state after reading a password. * Incorporated fix for OpenSSL Issue #3683 * LibreSSL version define LIBRESSL_VERSION_NUMBER will now be bumped for each portable release. * Removed workarounds for TLS client padding bugs. * No longer disable ECDHE-ECDSA on OS X * Removed SSLv3 support from openssl(1) * Removed IE 6 SSLv3 workarounds. * Modified tls_write in libtls to allow partial writes, clarified with examples in the documentation. * Removed RSAX engine * Tested SSLv3 removal with the OpenBSD ports tree and found several applications that were not ready to build without SSLv3 yet. For now, building a program that intentionally uses SSLv3 will result in a linker warning. * Added TLS_method, TLS_client_method and TLS_server_method as a replacement for the SSLv23_*method calls. * Added initial cmake build support, including support for building with Visual Studio, currently tested with Visual Studio 2013 Community Edition. * --with-enginesdir is removed as a configuration parameter * Default cert.pem, openssl.cnf, and x509v3.cnf files are now installed under $sysconfdir/ssl or the directory specified by --with-openssldir. Previous versions of LibreSSL left these empty. 2.2.1 - Build fixes, feature added, features removed * Assorted build fixes for musl, HP-UX, Mingw, Solaris. * Initial support for Windows Embedded 2009, Server 2003, XP * Protocol parsing conversions to BoringSSL's CRYPTO ByteString (CBS) API * Added EC_curve_nid2nist and EC_curve_nist2nid from OpenSSL * Removed Dynamic Engine support * Removed unused and obsolete MDC-2DES cipher * Removed workarounds for obsolete SSL implementations 2.2.0 - Build cleanups and new OS support, Security Updates * AIX Support - thanks to Michael Felt * Cygwin Support - thanks to Corinna Vinschen * Refactored build macros, support packaging libtls independently. There are more pieces required to support building and using OpenSSL with libtls, but this is an initial start at providing an independent package for people to start hacking on. * Removal of OPENSSL_issetugid and all library getenv calls. Applications can and should no longer rely on environment variables for changing library behavior. OPENSSL_CONF/SSLEAY_CONF is still supported with the openssl(1) command. * libtls API and documentation additions * Various bug fixes and simplifications to libssl and libcrypto * Fixes for the following issues are integrated into LibreSSL 2.2.0: - CVE-2015-1788 - Malformed ECParameters causes infinite loop - CVE-2015-1789 - Exploitable out-of-bounds read in X509_cmp_time - CVE-2015-1792 - CMS verify infinite loop with unknown hash function * The following CVEs did not apply to LibreSSL or were fixed in earlier releases: - CVE-2015-4000 - DHE man-in-the-middle protection (Logjam) - CVE-2015-1790 - PKCS7 crash with missing EnvelopedContent - CVE-2014-8176 - Invalid free in DTLS * Fixes for the following CVEs are still in review for LibreSSL - CVE-2015-1791 - Race condition handling NewSessionTicket 2.1.6 - Security update * Fixes for the following issues are integrated into LibreSSL 2.1.6: - CVE-2015-0209 - Use After Free following d2i_ECPrivatekey error - CVE-2015-0286 - Segmentation fault in ASN1_TYPE_cmp - CVE-2015-0287 - ASN.1 structure reuse memory corruption - CVE-2015-0288 - X509_to_X509_REQ NULL pointer deref - CVE-2015-0289 - PKCS7 NULL pointer dereferences * The fix for CVE-2015-0207 - Segmentation fault in DTLSv1_listen is integrated for safety, but LibreSSL is not vulnerable. * Libtls is now built by default. The --enable-libtls configuration option is no longer required. The libtls API is now stable for the 2.1.x series. 2.1.5 - Bug fixes and a security update * Fix incorrect comparison function in openssl(1) certhash command. Thanks to Christian Neukirchen / Void Linux. * Windows port improvements and bug fixes. - Removed a dependency on libgcc in 32-bit dynamic libraries. - Correct a hang in openssl(1) reading from stdin on an connection. - Initialize winsock in openssl(1) earlier, allow 'openssl ocsp' and any other network-related commands to function properly. * Reject all server DH keys smaller than 1024 bits. 2.1.4 - Security and feature updates * Improvements to libtls: - a new API for loading CA chains directly from memory instead of a file, allowing verification with privilege separation in a chroot without direct access to CA certificate files. - Ciphers default to TLSv1.2 with AEAD and PFS. - Improved error handling and message generation - New APIs and improved documentation * Added X509_STORE_load_mem API for loading certificates from memory. This facilitates accessing certificates from a chrooted environment. * New AEAD "MAC alias" allows configuring TLSv1.2 AEAD ciphers by using 'TLSv1.2+AEAD' as the cipher selection string. * Dead and disabled code removal including MD5, Netscape workarounds, non-POSIX IO, SCTP, RFC 3779 support, many #if 0 sections, and more. * ASN1 macro maze expanded to aid reading and searching the code. * NULL pointer asserts removed in favor of letting the OS/signal handler catch them. * Refactored argument handling in openssl(1) for consistency and maintainability. * New openssl(1) command 'certhash' replaces the c_rehash script. * Support for building with OPENSSL_NO_DEPRECATED * Server-side support for TLS_FALLBACK_SCSV for compatibility with various auditor and vulnerability scanners. * Dozens of issues found with the Coverity scanner fixed. * Security Updates: - Fix a minor information leak that was introduced in t1_lib.c r1.71, whereby an additional 28 bytes of .rodata (or .data) is provided to the network. In most cases this is a non-issue since the memory content is already public. Issue found and reported by Felix Groebert of the Google Security Team. - Fixes for the following low-severity issues were integrated into LibreSSL from OpenSSL 1.0.1k: CVE-2015-0205 - DH client certificates accepted without verification CVE-2014-3570 - Bignum squaring may produce incorrect results CVE-2014-8275 - Certificate fingerprints can be modified CVE-2014-3572 - ECDHE silently downgrades to ECDH [Client] Reported by Karthikeyan Bhargavan of the PROSECCO team at INRIA. The following CVEs were fixed in earlier LibreSSL releases: CVE-2015-0206 - Memory leak handling repeated DLTS records CVE-2014-3510 - Flaw handling DTLS anonymous EC(DH) ciphersuites. The following CVEs did not apply to LibreSSL: CVE-2014-3571 - DTLS segmentation fault in dtls1_get_record CVE-2014-3569 - no-ssl3 configuration sets method to NULL CVE-2015-0204 - RSA silently downgrades to EXPORT_RSA 2.1.3 - Security update and OS support improvements * Fixed various memory leaks in DTLS, including fixes for CVE-2015-0206. * Added Application-Layer Protocol Negotiation (ALPN) support. * Removed GOST R 34.10-94 signature authentication. * Removed nonfunctional Netscape browser-hang workaround code. * Simplified and refactored SSL/DTLS handshake code. * Added SHA256 Camellia cipher suites for TLS 1.2 from RFC 5932. * Hide timing info about padding errors during handshakes. * Improved libtls support for non-blocking sockets, added randomized session ID contexts. Work is ongoing with this library - feedback and potential use-cases are welcome. * Support building Windows DLLs. Thanks to Jan Engelhard. * Packaged config wrapper for better compatibility with OpenSSL-based build systems. Thanks to @technion from github * Ensure the stack is marked non-executable for assembly sections. Thanks to Anthony G. Bastile. * Enable extra compiler hardening flags by default, where applicable. The default set of hardening features can vary by OS to OS, so feedback is welcome on this. To disable the default hardening flags, specify '--disable-hardening' during configure. Thanks to Jim Barlow * Initial HP-UX support, tested with HP-UX 11.31 ia64 Thanks to Kinichiro Inoguchi * Initial NetBSD support, tested with NetBSD 6.1.5 x86_64 Imported from OpenNTPD, thanks to @gitisihara from github 2.1.2 - Many new features and improvements * Added reworked GOST cipher suite support thanks to Dmitry Eremin-Solenikov * Enabled Camellia ciphers due to improved patent situation * Use builtin arc4random implementation on OS X and FreeBSD this addresses some deficiencies in the native implementations of these operating systems, see commit logs for more information * Added initial Windows mingw-w64 support (32 and 64-bit) thanks to Song Dongsheng and others for code and feedback * Enabled assembly optimizations on x86_64 CPUs supports Linux, *BSD, Solaris and OS X operating systems thanks to Wouter Clarie for the initial implementation * Added no_ssl3/no_tls1_1/no_tls1_2 options to openssl(1) * Improved build infrastructure, 'make distcheck' now passes this simplifies and speeds developer efficiency thanks to Dmitry Eremin-Solenikov and Wouter Clarie * Allow conditional building of the libtls library expect the API and ABI of the library to change feedback is welcome * Fixes for more memory leaks, cleanups, etc. 2.1.1 - Security update * Address POODLE attack by disabling SSLv3 by default * Fix Eliptical Curve cipher selection bug (https://github.com/libressl/portable/issues/35) 2.1.0 - First release from the OpenBSD 5.7 tree * Added support for automatic ephemeral EC keys * Fixes for many memory leaks and overflows in error handlers * The TLS padding extension (that works around bugs in F5 terminators) is off by default * support for getrandom(2) on Linux 3.17 * the NO_ASM macro is no longer being set, providing the first bits toward enabling other assembly offloads. 2.0.5 - Fixes for CVEs from OpenSSL 1.0.1i * CVE-2014-3506 * CVE-2014-3507 * CVE-2014-3508 (partially vulnerable)he * CVE-2014-3509 * CVE-2014-3510 * CVE-2014-3511 * Synced LibreSSL Portable with the release version of OpenBSD 5.6 2.0.4 - Portability fixes, deleted unused SRP code 2.0.3 - Portability fixes, improvements to fork detection 2.0.2 - Address arc4random fork PID wraparound issues with pthread_atfork 2.0.1 - Portability fixes: * Removed -Werror and and other non-portable compiler flags * Allow setting OPENSSLDIR and ENGINSDIR 2.0.0 - First release from the OpenBSD 5.6 tree * Removal of many obsolete features and coding conventions from the OpenSSL 1.0.1h source