+++ ./src/svr-authpasswd.c
@@ -30,28 +30,14 @@
 #include "dbutil.h"
 #include "auth.h"
 #include "runopts.h"
+#include <termux-auth.h>
 
 #if DROPBEAR_SVR_PASSWORD_AUTH
 
-/* not constant time when strings are differing lengths. 
- string content isn't leaked, and crypt hashes are predictable length. */
-static int constant_time_strcmp(const char* a, const char* b) {
-	size_t la = strlen(a);
-	size_t lb = strlen(b);
-
-	if (la != lb) {
-		return 1;
-	}
-
-	return constant_time_memcmp(a, b, la);
-}
-
 /* Process a password auth request, sending success or failure messages as
  * appropriate */
 void svr_auth_password(int valid_user) {
 	
-	char * passwdcrypt = NULL; /* the crypt from /etc/passwd or /etc/shadow */
-	char * testcrypt = NULL; /* crypt generated from the user's password sent */
 	char * password = NULL;
 	unsigned int passwordlen;
 	unsigned int changepw;
@@ -65,6 +51,7 @@
 	}
 
 	password = buf_getstring(ses.payload, &passwordlen);
+#if 0
 	if (valid_user && passwordlen <= DROPBEAR_MAX_PASSWORD_LEN) {
 		/* the first bytes of passwdcrypt are the salt */
 		passwdcrypt = ses.authstate.pw_passwd;
@@ -106,6 +93,15 @@
 	}
 
 	if (constant_time_strcmp(testcrypt, passwdcrypt) == 0) {
+#else
+	/* check if password is valid */
+	if (termux_auth(ses.authstate.pw_name, password)) {
+		if (!ses.authstate.pw_name) {
+			dropbear_log(LOG_WARNING, "Login name is NULL");
+			send_msg_userauth_failure(0, 1);
+			return;
+		}
+#endif
 		if (svr_opts.multiauthmethod && (ses.authstate.authtypes & ~AUTH_TYPE_PASSWORD)) {
 			/* successful password authentication, but extra auth required */
 			dropbear_log(LOG_NOTICE,