fizz::ZlibCertificateDecompressor Class Reference

#include <ZlibCertificateDecompressor.h>

Inheritance diagram for fizz::ZlibCertificateDecompressor:

Public Member Functions
	~ZlibCertificateDecompressor () override=default
CertificateCompressionAlgorithm	getAlgorithm () const override
CertificateMsg	decompress (const CompressedCertificate &) override
Public Member Functions inherited from fizz::CertificateDecompressor
virtual	~CertificateDecompressor ()=default

Detailed Description

Definition at line 15 of file ZlibCertificateDecompressor.h.

Constructor & Destructor Documentation

fizz::ZlibCertificateDecompressor::~ZlibCertificateDecompressor ( )

overridedefault

Member Function Documentation

CertificateMsg fizz::ZlibCertificateDecompressor::decompress ( const CompressedCertificate &  cc )

overridevirtual

Implements fizz::CertificateDecompressor.

Definition at line 20 of file ZlibCertificateDecompressor.cpp.

References fizz::CompressedCertificate::algorithm, fizz::CompressedCertificate::compressed_certificate_message, folly::IOBuf::create(), fizz::kMaxHandshakeSize, folly::gen::move, folly::size(), fizz::toString(), and fizz::CompressedCertificate::uncompressed_length.

                                     {
  if (cc.algorithm != getAlgorithm()) {
    throw std::runtime_error(
        "Compressed certificate uses non-zlib algorithm: " +
        toString(cc.algorithm));
  }

  if (cc.uncompressed_length > kMaxHandshakeSize) {
    throw std::runtime_error(
        "Compressed certificate exceeds maximum certificate message size");
  }

  auto rawCertMessage = IOBuf::create(cc.uncompressed_length);
  unsigned long size = cc.uncompressed_length;
  auto compRange = cc.compressed_certificate_message->coalesce();
  auto status = ::uncompress(
      rawCertMessage->writableData(),
      &size,
      compRange.data(),
      compRange.size());
  switch (status) {
    case Z_OK:
      if (size != cc.uncompressed_length) {
        throw std::runtime_error("Uncompressed length incorrect");
      }
      break;
    case Z_MEM_ERROR:
      throw std::runtime_error("Insufficient memory to decompress cert");
    case Z_BUF_ERROR:
      throw std::runtime_error(
          "The uncompressed length given is too small to hold uncompressed data");
    case Z_DATA_ERROR:
      throw std::runtime_error(
          "The compressed certificate data was incomplete or invalid");
    default:
      throw std::runtime_error(
          "Failed to decompress: " + to<std::string>(status));
  }
  rawCertMessage->append(size);
  return decode<CertificateMsg>(std::move(rawCertMessage));
}

CertificateCompressionAlgorithm fizz::ZlibCertificateDecompressor::getAlgorithm ( ) const

overridevirtual

Implements fizz::CertificateDecompressor.

Definition at line 15 of file ZlibCertificateDecompressor.cpp.

          {
  return CertificateCompressionAlgorithm::zlib;
}

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The documentation for this class was generated from the following files:

• proxygen/fizz/fizz/protocol/ZlibCertificateDecompressor.h
• proxygen/fizz/fizz/protocol/ZlibCertificateDecompressor.cpp