/library/ssl_tls.c
C | 3928 lines | 2932 code | 683 blank | 313 comment | 607 complexity | 504bfd6a3b35637d9b6b914116e0df85 MD5 | raw file
Possible License(s): GPL-2.0
- /*
- * SSLv3/TLSv1 shared functions
- *
- * Copyright (C) 2006-2012, Brainspark B.V.
- *
- * This file is part of PolarSSL (http://www.polarssl.org)
- * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
- *
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- /*
- * The SSL 3.0 specification was drafted by Netscape in 1996,
- * and became an IETF standard in 1999.
- *
- * http://wp.netscape.com/eng/ssl3/
- * http://www.ietf.org/rfc/rfc2246.txt
- * http://www.ietf.org/rfc/rfc4346.txt
- */
- #include "polarssl/config.h"
- #if defined(POLARSSL_SSL_TLS_C)
- #include "polarssl/aes.h"
- #include "polarssl/arc4.h"
- #include "polarssl/camellia.h"
- #include "polarssl/des.h"
- #include "polarssl/debug.h"
- #include "polarssl/ssl.h"
- #include "polarssl/sha2.h"
- #if defined(POLARSSL_GCM_C)
- #include "polarssl/gcm.h"
- #endif
- #include <stdlib.h>
- #include <time.h>
- #if defined _MSC_VER && !defined strcasecmp
- #define strcasecmp _stricmp
- #endif
- #if defined(POLARSSL_SSL_HW_RECORD_ACCEL)
- int (*ssl_hw_record_init)(ssl_context *ssl,
- const unsigned char *key_enc, const unsigned char *key_dec,
- const unsigned char *iv_enc, const unsigned char *iv_dec,
- const unsigned char *mac_enc, const unsigned char *mac_dec) = NULL;
- int (*ssl_hw_record_reset)(ssl_context *ssl) = NULL;
- int (*ssl_hw_record_write)(ssl_context *ssl) = NULL;
- int (*ssl_hw_record_read)(ssl_context *ssl) = NULL;
- int (*ssl_hw_record_finish)(ssl_context *ssl) = NULL;
- #endif
- static int ssl_rsa_decrypt( void *ctx, int mode, size_t *olen,
- const unsigned char *input, unsigned char *output,
- size_t output_max_len )
- {
- return rsa_pkcs1_decrypt( (rsa_context *) ctx, mode, olen, input, output,
- output_max_len );
- }
- static int ssl_rsa_sign( void *ctx,
- int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
- int mode, int hash_id, unsigned int hashlen,
- const unsigned char *hash, unsigned char *sig )
- {
- return rsa_pkcs1_sign( (rsa_context *) ctx, f_rng, p_rng, mode, hash_id,
- hashlen, hash, sig );
- }
- static size_t ssl_rsa_key_len( void *ctx )
- {
- return ( (rsa_context *) ctx )->len;
- }
- /*
- * Key material generation
- */
- static int ssl3_prf( unsigned char *secret, size_t slen, char *label,
- unsigned char *random, size_t rlen,
- unsigned char *dstbuf, size_t dlen )
- {
- size_t i;
- md5_context md5;
- sha1_context sha1;
- unsigned char padding[16];
- unsigned char sha1sum[20];
- ((void)label);
- /*
- * SSLv3:
- * block =
- * MD5( secret + SHA1( 'A' + secret + random ) ) +
- * MD5( secret + SHA1( 'BB' + secret + random ) ) +
- * MD5( secret + SHA1( 'CCC' + secret + random ) ) +
- * ...
- */
- for( i = 0; i < dlen / 16; i++ )
- {
- memset( padding, 'A' + i, 1 + i );
- sha1_starts( &sha1 );
- sha1_update( &sha1, padding, 1 + i );
- sha1_update( &sha1, secret, slen );
- sha1_update( &sha1, random, rlen );
- sha1_finish( &sha1, sha1sum );
- md5_starts( &md5 );
- md5_update( &md5, secret, slen );
- md5_update( &md5, sha1sum, 20 );
- md5_finish( &md5, dstbuf + i * 16 );
- }
- memset( &md5, 0, sizeof( md5 ) );
- memset( &sha1, 0, sizeof( sha1 ) );
- memset( padding, 0, sizeof( padding ) );
- memset( sha1sum, 0, sizeof( sha1sum ) );
- return( 0 );
- }
- static int tls1_prf( unsigned char *secret, size_t slen, char *label,
- unsigned char *random, size_t rlen,
- unsigned char *dstbuf, size_t dlen )
- {
- size_t nb, hs;
- size_t i, j, k;
- unsigned char *S1, *S2;
- unsigned char tmp[128];
- unsigned char h_i[20];
- if( sizeof( tmp ) < 20 + strlen( label ) + rlen )
- return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
- hs = ( slen + 1 ) / 2;
- S1 = secret;
- S2 = secret + slen - hs;
- nb = strlen( label );
- memcpy( tmp + 20, label, nb );
- memcpy( tmp + 20 + nb, random, rlen );
- nb += rlen;
- /*
- * First compute P_md5(secret,label+random)[0..dlen]
- */
- md5_hmac( S1, hs, tmp + 20, nb, 4 + tmp );
- for( i = 0; i < dlen; i += 16 )
- {
- md5_hmac( S1, hs, 4 + tmp, 16 + nb, h_i );
- md5_hmac( S1, hs, 4 + tmp, 16, 4 + tmp );
- k = ( i + 16 > dlen ) ? dlen % 16 : 16;
- for( j = 0; j < k; j++ )
- dstbuf[i + j] = h_i[j];
- }
- /*
- * XOR out with P_sha1(secret,label+random)[0..dlen]
- */
- sha1_hmac( S2, hs, tmp + 20, nb, tmp );
- for( i = 0; i < dlen; i += 20 )
- {
- sha1_hmac( S2, hs, tmp, 20 + nb, h_i );
- sha1_hmac( S2, hs, tmp, 20, tmp );
- k = ( i + 20 > dlen ) ? dlen % 20 : 20;
- for( j = 0; j < k; j++ )
- dstbuf[i + j] = (unsigned char)( dstbuf[i + j] ^ h_i[j] );
- }
- memset( tmp, 0, sizeof( tmp ) );
- memset( h_i, 0, sizeof( h_i ) );
- return( 0 );
- }
- static int tls_prf_sha256( unsigned char *secret, size_t slen, char *label,
- unsigned char *random, size_t rlen,
- unsigned char *dstbuf, size_t dlen )
- {
- size_t nb;
- size_t i, j, k;
- unsigned char tmp[128];
- unsigned char h_i[32];
- if( sizeof( tmp ) < 32 + strlen( label ) + rlen )
- return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
- nb = strlen( label );
- memcpy( tmp + 32, label, nb );
- memcpy( tmp + 32 + nb, random, rlen );
- nb += rlen;
- /*
- * Compute P_<hash>(secret, label + random)[0..dlen]
- */
- sha2_hmac( secret, slen, tmp + 32, nb, tmp, 0 );
- for( i = 0; i < dlen; i += 32 )
- {
- sha2_hmac( secret, slen, tmp, 32 + nb, h_i, 0 );
- sha2_hmac( secret, slen, tmp, 32, tmp, 0 );
- k = ( i + 32 > dlen ) ? dlen % 32 : 32;
- for( j = 0; j < k; j++ )
- dstbuf[i + j] = h_i[j];
- }
- memset( tmp, 0, sizeof( tmp ) );
- memset( h_i, 0, sizeof( h_i ) );
- return( 0 );
- }
- #if defined(POLARSSL_SHA4_C)
- static int tls_prf_sha384( unsigned char *secret, size_t slen, char *label,
- unsigned char *random, size_t rlen,
- unsigned char *dstbuf, size_t dlen )
- {
- size_t nb;
- size_t i, j, k;
- unsigned char tmp[128];
- unsigned char h_i[48];
- if( sizeof( tmp ) < 48 + strlen( label ) + rlen )
- return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
- nb = strlen( label );
- memcpy( tmp + 48, label, nb );
- memcpy( tmp + 48 + nb, random, rlen );
- nb += rlen;
- /*
- * Compute P_<hash>(secret, label + random)[0..dlen]
- */
- sha4_hmac( secret, slen, tmp + 48, nb, tmp, 1 );
- for( i = 0; i < dlen; i += 48 )
- {
- sha4_hmac( secret, slen, tmp, 48 + nb, h_i, 1 );
- sha4_hmac( secret, slen, tmp, 48, tmp, 1 );
- k = ( i + 48 > dlen ) ? dlen % 48 : 48;
- for( j = 0; j < k; j++ )
- dstbuf[i + j] = h_i[j];
- }
- memset( tmp, 0, sizeof( tmp ) );
- memset( h_i, 0, sizeof( h_i ) );
- return( 0 );
- }
- #endif
- static void ssl_update_checksum_start(ssl_context *, unsigned char *, size_t);
- static void ssl_update_checksum_md5sha1(ssl_context *, unsigned char *, size_t);
- static void ssl_update_checksum_sha256(ssl_context *, unsigned char *, size_t);
- static void ssl_calc_verify_ssl(ssl_context *,unsigned char *);
- static void ssl_calc_verify_tls(ssl_context *,unsigned char *);
- static void ssl_calc_verify_tls_sha256(ssl_context *,unsigned char *);
- static void ssl_calc_finished_ssl(ssl_context *,unsigned char *,int);
- static void ssl_calc_finished_tls(ssl_context *,unsigned char *,int);
- static void ssl_calc_finished_tls_sha256(ssl_context *,unsigned char *,int);
- #if defined(POLARSSL_SHA4_C)
- static void ssl_update_checksum_sha384(ssl_context *, unsigned char *, size_t);
- static void ssl_calc_verify_tls_sha384(ssl_context *,unsigned char *);
- static void ssl_calc_finished_tls_sha384(ssl_context *,unsigned char *,int);
- #endif
- int ssl_derive_keys( ssl_context *ssl )
- {
- unsigned char tmp[64];
- unsigned char keyblk[256];
- unsigned char *key1;
- unsigned char *key2;
- unsigned int iv_copy_len;
- ssl_session *session = ssl->session_negotiate;
- ssl_transform *transform = ssl->transform_negotiate;
- ssl_handshake_params *handshake = ssl->handshake;
- SSL_DEBUG_MSG( 2, ( "=> derive keys" ) );
- /*
- * Set appropriate PRF function and other SSL / TLS / TLS1.2 functions
- */
- if( ssl->minor_ver == SSL_MINOR_VERSION_0 )
- {
- handshake->tls_prf = ssl3_prf;
- handshake->calc_verify = ssl_calc_verify_ssl;
- handshake->calc_finished = ssl_calc_finished_ssl;
- }
- else if( ssl->minor_ver < SSL_MINOR_VERSION_3 )
- {
- handshake->tls_prf = tls1_prf;
- handshake->calc_verify = ssl_calc_verify_tls;
- handshake->calc_finished = ssl_calc_finished_tls;
- }
- #if defined(POLARSSL_SHA4_C)
- else if( session->ciphersuite == TLS_RSA_WITH_AES_256_GCM_SHA384 ||
- session->ciphersuite == TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 )
- {
- handshake->tls_prf = tls_prf_sha384;
- handshake->calc_verify = ssl_calc_verify_tls_sha384;
- handshake->calc_finished = ssl_calc_finished_tls_sha384;
- }
- #endif
- else
- {
- handshake->tls_prf = tls_prf_sha256;
- handshake->calc_verify = ssl_calc_verify_tls_sha256;
- handshake->calc_finished = ssl_calc_finished_tls_sha256;
- }
- /*
- * SSLv3:
- * master =
- * MD5( premaster + SHA1( 'A' + premaster + randbytes ) ) +
- * MD5( premaster + SHA1( 'BB' + premaster + randbytes ) ) +
- * MD5( premaster + SHA1( 'CCC' + premaster + randbytes ) )
- *
- * TLSv1:
- * master = PRF( premaster, "master secret", randbytes )[0..47]
- */
- if( handshake->resume == 0 )
- {
- SSL_DEBUG_BUF( 3, "premaster secret", handshake->premaster,
- handshake->pmslen );
- handshake->tls_prf( handshake->premaster, handshake->pmslen,
- "master secret",
- handshake->randbytes, 64, session->master, 48 );
- memset( handshake->premaster, 0, sizeof( handshake->premaster ) );
- }
- else
- SSL_DEBUG_MSG( 3, ( "no premaster (session resumed)" ) );
- /*
- * Swap the client and server random values.
- */
- memcpy( tmp, handshake->randbytes, 64 );
- memcpy( handshake->randbytes, tmp + 32, 32 );
- memcpy( handshake->randbytes + 32, tmp, 32 );
- memset( tmp, 0, sizeof( tmp ) );
- /*
- * SSLv3:
- * key block =
- * MD5( master + SHA1( 'A' + master + randbytes ) ) +
- * MD5( master + SHA1( 'BB' + master + randbytes ) ) +
- * MD5( master + SHA1( 'CCC' + master + randbytes ) ) +
- * MD5( master + SHA1( 'DDDD' + master + randbytes ) ) +
- * ...
- *
- * TLSv1:
- * key block = PRF( master, "key expansion", randbytes )
- */
- handshake->tls_prf( session->master, 48, "key expansion",
- handshake->randbytes, 64, keyblk, 256 );
- SSL_DEBUG_MSG( 3, ( "ciphersuite = %s",
- ssl_get_ciphersuite_name( session->ciphersuite ) ) );
- SSL_DEBUG_BUF( 3, "master secret", session->master, 48 );
- SSL_DEBUG_BUF( 4, "random bytes", handshake->randbytes, 64 );
- SSL_DEBUG_BUF( 4, "key block", keyblk, 256 );
- memset( handshake->randbytes, 0, sizeof( handshake->randbytes ) );
- /*
- * Determine the appropriate key, IV and MAC length.
- */
- switch( session->ciphersuite )
- {
- #if defined(POLARSSL_ARC4_C)
- case TLS_RSA_WITH_RC4_128_MD5:
- transform->keylen = 16; transform->minlen = 16;
- transform->ivlen = 0; transform->maclen = 16;
- break;
- case TLS_RSA_WITH_RC4_128_SHA:
- transform->keylen = 16; transform->minlen = 20;
- transform->ivlen = 0; transform->maclen = 20;
- break;
- #endif
- #if defined(POLARSSL_DES_C)
- case TLS_RSA_WITH_3DES_EDE_CBC_SHA:
- case TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA:
- transform->keylen = 24; transform->minlen = 24;
- transform->ivlen = 8; transform->maclen = 20;
- break;
- #endif
- #if defined(POLARSSL_AES_C)
- case TLS_RSA_WITH_AES_128_CBC_SHA:
- case TLS_DHE_RSA_WITH_AES_128_CBC_SHA:
- transform->keylen = 16; transform->minlen = 32;
- transform->ivlen = 16; transform->maclen = 20;
- break;
- case TLS_RSA_WITH_AES_256_CBC_SHA:
- case TLS_DHE_RSA_WITH_AES_256_CBC_SHA:
- transform->keylen = 32; transform->minlen = 32;
- transform->ivlen = 16; transform->maclen = 20;
- break;
- #if defined(POLARSSL_SHA2_C)
- case TLS_RSA_WITH_AES_128_CBC_SHA256:
- case TLS_DHE_RSA_WITH_AES_128_CBC_SHA256:
- transform->keylen = 16; transform->minlen = 32;
- transform->ivlen = 16; transform->maclen = 32;
- break;
- case TLS_RSA_WITH_AES_256_CBC_SHA256:
- case TLS_DHE_RSA_WITH_AES_256_CBC_SHA256:
- transform->keylen = 32; transform->minlen = 32;
- transform->ivlen = 16; transform->maclen = 32;
- break;
- #endif
- #if defined(POLARSSL_GCM_C)
- case TLS_RSA_WITH_AES_128_GCM_SHA256:
- case TLS_DHE_RSA_WITH_AES_128_GCM_SHA256:
- transform->keylen = 16; transform->minlen = 1;
- transform->ivlen = 12; transform->maclen = 0;
- transform->fixed_ivlen = 4;
- break;
- case TLS_RSA_WITH_AES_256_GCM_SHA384:
- case TLS_DHE_RSA_WITH_AES_256_GCM_SHA384:
- transform->keylen = 32; transform->minlen = 1;
- transform->ivlen = 12; transform->maclen = 0;
- transform->fixed_ivlen = 4;
- break;
- #endif
- #endif
- #if defined(POLARSSL_CAMELLIA_C)
- case TLS_RSA_WITH_CAMELLIA_128_CBC_SHA:
- case TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA:
- transform->keylen = 16; transform->minlen = 32;
- transform->ivlen = 16; transform->maclen = 20;
- break;
- case TLS_RSA_WITH_CAMELLIA_256_CBC_SHA:
- case TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA:
- transform->keylen = 32; transform->minlen = 32;
- transform->ivlen = 16; transform->maclen = 20;
- break;
- #if defined(POLARSSL_SHA2_C)
- case TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256:
- case TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256:
- transform->keylen = 16; transform->minlen = 32;
- transform->ivlen = 16; transform->maclen = 32;
- break;
- case TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256:
- case TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256:
- transform->keylen = 32; transform->minlen = 32;
- transform->ivlen = 16; transform->maclen = 32;
- break;
- #endif
- #endif
- #if defined(POLARSSL_ENABLE_WEAK_CIPHERSUITES)
- #if defined(POLARSSL_CIPHER_NULL_CIPHER)
- case TLS_RSA_WITH_NULL_MD5:
- transform->keylen = 0; transform->minlen = 0;
- transform->ivlen = 0; transform->maclen = 16;
- break;
- case TLS_RSA_WITH_NULL_SHA:
- transform->keylen = 0; transform->minlen = 0;
- transform->ivlen = 0; transform->maclen = 20;
- break;
- case TLS_RSA_WITH_NULL_SHA256:
- transform->keylen = 0; transform->minlen = 0;
- transform->ivlen = 0; transform->maclen = 32;
- break;
- #endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
- #if defined(POLARSSL_DES_C)
- case TLS_RSA_WITH_DES_CBC_SHA:
- case TLS_DHE_RSA_WITH_DES_CBC_SHA:
- transform->keylen = 8; transform->minlen = 8;
- transform->ivlen = 8; transform->maclen = 20;
- break;
- #endif
- #endif /* defined(POLARSSL_ENABLE_WEAK_CIPHERSUITES) */
- default:
- SSL_DEBUG_MSG( 1, ( "ciphersuite %s is not available",
- ssl_get_ciphersuite_name( session->ciphersuite ) ) );
- return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
- }
- SSL_DEBUG_MSG( 3, ( "keylen: %d, minlen: %d, ivlen: %d, maclen: %d",
- transform->keylen, transform->minlen, transform->ivlen,
- transform->maclen ) );
- /*
- * Finally setup the cipher contexts, IVs and MAC secrets.
- */
- if( ssl->endpoint == SSL_IS_CLIENT )
- {
- key1 = keyblk + transform->maclen * 2;
- key2 = keyblk + transform->maclen * 2 + transform->keylen;
- memcpy( transform->mac_enc, keyblk, transform->maclen );
- memcpy( transform->mac_dec, keyblk + transform->maclen,
- transform->maclen );
- /*
- * This is not used in TLS v1.1.
- */
- iv_copy_len = ( transform->fixed_ivlen ) ?
- transform->fixed_ivlen : transform->ivlen;
- memcpy( transform->iv_enc, key2 + transform->keylen, iv_copy_len );
- memcpy( transform->iv_dec, key2 + transform->keylen + iv_copy_len,
- iv_copy_len );
- }
- else
- {
- key1 = keyblk + transform->maclen * 2 + transform->keylen;
- key2 = keyblk + transform->maclen * 2;
- memcpy( transform->mac_dec, keyblk, transform->maclen );
- memcpy( transform->mac_enc, keyblk + transform->maclen,
- transform->maclen );
- /*
- * This is not used in TLS v1.1.
- */
- iv_copy_len = ( transform->fixed_ivlen ) ?
- transform->fixed_ivlen : transform->ivlen;
- memcpy( transform->iv_dec, key1 + transform->keylen, iv_copy_len );
- memcpy( transform->iv_enc, key1 + transform->keylen + iv_copy_len,
- iv_copy_len );
- }
- #if defined(POLARSSL_SSL_HW_RECORD_ACCEL)
- if( ssl_hw_record_init != NULL)
- {
- int ret = 0;
- SSL_DEBUG_MSG( 2, ( "going for ssl_hw_record_init()" ) );
- if( ( ret = ssl_hw_record_init( ssl, key1, key2, transform->iv_enc,
- transform->iv_dec, transform->mac_enc,
- transform->mac_dec ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_hw_record_init", ret );
- return POLARSSL_ERR_SSL_HW_ACCEL_FAILED;
- }
- }
- #endif
- switch( session->ciphersuite )
- {
- #if defined(POLARSSL_ARC4_C)
- case TLS_RSA_WITH_RC4_128_MD5:
- case TLS_RSA_WITH_RC4_128_SHA:
- arc4_setup( (arc4_context *) transform->ctx_enc, key1,
- transform->keylen );
- arc4_setup( (arc4_context *) transform->ctx_dec, key2,
- transform->keylen );
- break;
- #endif
- #if defined(POLARSSL_DES_C)
- case TLS_RSA_WITH_3DES_EDE_CBC_SHA:
- case TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA:
- des3_set3key_enc( (des3_context *) transform->ctx_enc, key1 );
- des3_set3key_dec( (des3_context *) transform->ctx_dec, key2 );
- break;
- #endif
- #if defined(POLARSSL_AES_C)
- case TLS_RSA_WITH_AES_128_CBC_SHA:
- case TLS_DHE_RSA_WITH_AES_128_CBC_SHA:
- case TLS_RSA_WITH_AES_128_CBC_SHA256:
- case TLS_DHE_RSA_WITH_AES_128_CBC_SHA256:
- aes_setkey_enc( (aes_context *) transform->ctx_enc, key1, 128 );
- aes_setkey_dec( (aes_context *) transform->ctx_dec, key2, 128 );
- break;
- case TLS_RSA_WITH_AES_256_CBC_SHA:
- case TLS_DHE_RSA_WITH_AES_256_CBC_SHA:
- case TLS_RSA_WITH_AES_256_CBC_SHA256:
- case TLS_DHE_RSA_WITH_AES_256_CBC_SHA256:
- aes_setkey_enc( (aes_context *) transform->ctx_enc, key1, 256 );
- aes_setkey_dec( (aes_context *) transform->ctx_dec, key2, 256 );
- break;
- #if defined(POLARSSL_GCM_C)
- case TLS_RSA_WITH_AES_128_GCM_SHA256:
- case TLS_DHE_RSA_WITH_AES_128_GCM_SHA256:
- gcm_init( (gcm_context *) transform->ctx_enc, key1, 128 );
- gcm_init( (gcm_context *) transform->ctx_dec, key2, 128 );
- break;
- case TLS_RSA_WITH_AES_256_GCM_SHA384:
- case TLS_DHE_RSA_WITH_AES_256_GCM_SHA384:
- gcm_init( (gcm_context *) transform->ctx_enc, key1, 256 );
- gcm_init( (gcm_context *) transform->ctx_dec, key2, 256 );
- break;
- #endif
- #endif
- #if defined(POLARSSL_CAMELLIA_C)
- case TLS_RSA_WITH_CAMELLIA_128_CBC_SHA:
- case TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA:
- case TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256:
- case TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256:
- camellia_setkey_enc( (camellia_context *) transform->ctx_enc, key1, 128 );
- camellia_setkey_dec( (camellia_context *) transform->ctx_dec, key2, 128 );
- break;
- case TLS_RSA_WITH_CAMELLIA_256_CBC_SHA:
- case TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA:
- case TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256:
- case TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256:
- camellia_setkey_enc( (camellia_context *) transform->ctx_enc, key1, 256 );
- camellia_setkey_dec( (camellia_context *) transform->ctx_dec, key2, 256 );
- break;
- #endif
- #if defined(POLARSSL_ENABLE_WEAK_CIPHERSUITES)
- #if defined(POLARSSL_CIPHER_NULL_CIPHER)
- case TLS_RSA_WITH_NULL_MD5:
- case TLS_RSA_WITH_NULL_SHA:
- case TLS_RSA_WITH_NULL_SHA256:
- break;
- #endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
- #if defined(POLARSSL_DES_C)
- case TLS_RSA_WITH_DES_CBC_SHA:
- case TLS_DHE_RSA_WITH_DES_CBC_SHA:
- des_setkey_enc( (des_context *) transform->ctx_enc, key1 );
- des_setkey_dec( (des_context *) transform->ctx_dec, key2 );
- break;
- #endif
- #endif /* defined(POLARSSL_ENABLE_WEAK_CIPHERSUITES) */
- default:
- return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
- }
- memset( keyblk, 0, sizeof( keyblk ) );
- #if defined(POLARSSL_ZLIB_SUPPORT)
- // Initialize compression
- //
- if( session->compression == SSL_COMPRESS_DEFLATE )
- {
- SSL_DEBUG_MSG( 3, ( "Initializing zlib states" ) );
- memset( &transform->ctx_deflate, 0, sizeof( transform->ctx_deflate ) );
- memset( &transform->ctx_inflate, 0, sizeof( transform->ctx_inflate ) );
- if( deflateInit( &transform->ctx_deflate, Z_DEFAULT_COMPRESSION ) != Z_OK ||
- inflateInit( &transform->ctx_inflate ) != Z_OK )
- {
- SSL_DEBUG_MSG( 1, ( "Failed to initialize compression" ) );
- return( POLARSSL_ERR_SSL_COMPRESSION_FAILED );
- }
- }
- #endif /* POLARSSL_ZLIB_SUPPORT */
- SSL_DEBUG_MSG( 2, ( "<= derive keys" ) );
- return( 0 );
- }
- void ssl_calc_verify_ssl( ssl_context *ssl, unsigned char hash[36] )
- {
- md5_context md5;
- sha1_context sha1;
- unsigned char pad_1[48];
- unsigned char pad_2[48];
- SSL_DEBUG_MSG( 2, ( "=> calc verify ssl" ) );
- memcpy( &md5 , &ssl->handshake->fin_md5 , sizeof(md5_context) );
- memcpy( &sha1, &ssl->handshake->fin_sha1, sizeof(sha1_context) );
- memset( pad_1, 0x36, 48 );
- memset( pad_2, 0x5C, 48 );
- md5_update( &md5, ssl->session_negotiate->master, 48 );
- md5_update( &md5, pad_1, 48 );
- md5_finish( &md5, hash );
- md5_starts( &md5 );
- md5_update( &md5, ssl->session_negotiate->master, 48 );
- md5_update( &md5, pad_2, 48 );
- md5_update( &md5, hash, 16 );
- md5_finish( &md5, hash );
- sha1_update( &sha1, ssl->session_negotiate->master, 48 );
- sha1_update( &sha1, pad_1, 40 );
- sha1_finish( &sha1, hash + 16 );
- sha1_starts( &sha1 );
- sha1_update( &sha1, ssl->session_negotiate->master, 48 );
- sha1_update( &sha1, pad_2, 40 );
- sha1_update( &sha1, hash + 16, 20 );
- sha1_finish( &sha1, hash + 16 );
- SSL_DEBUG_BUF( 3, "calculated verify result", hash, 36 );
- SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
- return;
- }
- void ssl_calc_verify_tls( ssl_context *ssl, unsigned char hash[36] )
- {
- md5_context md5;
- sha1_context sha1;
- SSL_DEBUG_MSG( 2, ( "=> calc verify tls" ) );
- memcpy( &md5 , &ssl->handshake->fin_md5 , sizeof(md5_context) );
- memcpy( &sha1, &ssl->handshake->fin_sha1, sizeof(sha1_context) );
- md5_finish( &md5, hash );
- sha1_finish( &sha1, hash + 16 );
- SSL_DEBUG_BUF( 3, "calculated verify result", hash, 36 );
- SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
- return;
- }
- void ssl_calc_verify_tls_sha256( ssl_context *ssl, unsigned char hash[32] )
- {
- sha2_context sha2;
- SSL_DEBUG_MSG( 2, ( "=> calc verify sha256" ) );
- memcpy( &sha2, &ssl->handshake->fin_sha2, sizeof(sha2_context) );
- sha2_finish( &sha2, hash );
- SSL_DEBUG_BUF( 3, "calculated verify result", hash, 32 );
- SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
- return;
- }
- #if defined(POLARSSL_SHA4_C)
- void ssl_calc_verify_tls_sha384( ssl_context *ssl, unsigned char hash[48] )
- {
- sha4_context sha4;
- SSL_DEBUG_MSG( 2, ( "=> calc verify sha384" ) );
- memcpy( &sha4, &ssl->handshake->fin_sha4, sizeof(sha4_context) );
- sha4_finish( &sha4, hash );
- SSL_DEBUG_BUF( 3, "calculated verify result", hash, 48 );
- SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
- return;
- }
- #endif
- /*
- * SSLv3.0 MAC functions
- */
- static void ssl_mac_md5( unsigned char *secret,
- unsigned char *buf, size_t len,
- unsigned char *ctr, int type )
- {
- unsigned char header[11];
- unsigned char padding[48];
- md5_context md5;
- memcpy( header, ctr, 8 );
- header[ 8] = (unsigned char) type;
- header[ 9] = (unsigned char)( len >> 8 );
- header[10] = (unsigned char)( len );
- memset( padding, 0x36, 48 );
- md5_starts( &md5 );
- md5_update( &md5, secret, 16 );
- md5_update( &md5, padding, 48 );
- md5_update( &md5, header, 11 );
- md5_update( &md5, buf, len );
- md5_finish( &md5, buf + len );
- memset( padding, 0x5C, 48 );
- md5_starts( &md5 );
- md5_update( &md5, secret, 16 );
- md5_update( &md5, padding, 48 );
- md5_update( &md5, buf + len, 16 );
- md5_finish( &md5, buf + len );
- }
- static void ssl_mac_sha1( unsigned char *secret,
- unsigned char *buf, size_t len,
- unsigned char *ctr, int type )
- {
- unsigned char header[11];
- unsigned char padding[40];
- sha1_context sha1;
- memcpy( header, ctr, 8 );
- header[ 8] = (unsigned char) type;
- header[ 9] = (unsigned char)( len >> 8 );
- header[10] = (unsigned char)( len );
- memset( padding, 0x36, 40 );
- sha1_starts( &sha1 );
- sha1_update( &sha1, secret, 20 );
- sha1_update( &sha1, padding, 40 );
- sha1_update( &sha1, header, 11 );
- sha1_update( &sha1, buf, len );
- sha1_finish( &sha1, buf + len );
- memset( padding, 0x5C, 40 );
- sha1_starts( &sha1 );
- sha1_update( &sha1, secret, 20 );
- sha1_update( &sha1, padding, 40 );
- sha1_update( &sha1, buf + len, 20 );
- sha1_finish( &sha1, buf + len );
- }
- static void ssl_mac_sha2( unsigned char *secret,
- unsigned char *buf, size_t len,
- unsigned char *ctr, int type )
- {
- unsigned char header[11];
- unsigned char padding[32];
- sha2_context sha2;
- memcpy( header, ctr, 8 );
- header[ 8] = (unsigned char) type;
- header[ 9] = (unsigned char)( len >> 8 );
- header[10] = (unsigned char)( len );
- memset( padding, 0x36, 32 );
- sha2_starts( &sha2, 0 );
- sha2_update( &sha2, secret, 32 );
- sha2_update( &sha2, padding, 32 );
- sha2_update( &sha2, header, 11 );
- sha2_update( &sha2, buf, len );
- sha2_finish( &sha2, buf + len );
- memset( padding, 0x5C, 32 );
- sha2_starts( &sha2, 0 );
- sha2_update( &sha2, secret, 32 );
- sha2_update( &sha2, padding, 32 );
- sha2_update( &sha2, buf + len, 32 );
- sha2_finish( &sha2, buf + len );
- }
- /*
- * Encryption/decryption functions
- */
- static int ssl_encrypt_buf( ssl_context *ssl )
- {
- size_t i, padlen;
- SSL_DEBUG_MSG( 2, ( "=> encrypt buf" ) );
- /*
- * Add MAC then encrypt
- */
- if( ssl->minor_ver == SSL_MINOR_VERSION_0 )
- {
- if( ssl->transform_out->maclen == 16 )
- ssl_mac_md5( ssl->transform_out->mac_enc,
- ssl->out_msg, ssl->out_msglen,
- ssl->out_ctr, ssl->out_msgtype );
- else if( ssl->transform_out->maclen == 20 )
- ssl_mac_sha1( ssl->transform_out->mac_enc,
- ssl->out_msg, ssl->out_msglen,
- ssl->out_ctr, ssl->out_msgtype );
- else if( ssl->transform_out->maclen == 32 )
- ssl_mac_sha2( ssl->transform_out->mac_enc,
- ssl->out_msg, ssl->out_msglen,
- ssl->out_ctr, ssl->out_msgtype );
- else if( ssl->transform_out->maclen != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "invalid MAC len: %d",
- ssl->transform_out->maclen ) );
- return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
- }
- }
- else
- {
- if( ssl->transform_out->maclen == 16 )
- {
- md5_context ctx;
- md5_hmac_starts( &ctx, ssl->transform_out->mac_enc, 16 );
- md5_hmac_update( &ctx, ssl->out_ctr, 13 );
- md5_hmac_update( &ctx, ssl->out_msg, ssl->out_msglen );
- md5_hmac_finish( &ctx, ssl->out_msg + ssl->out_msglen );
- memset( &ctx, 0, sizeof(md5_context));
- }
- else if( ssl->transform_out->maclen == 20 )
- {
- sha1_context ctx;
- sha1_hmac_starts( &ctx, ssl->transform_out->mac_enc, 20 );
- sha1_hmac_update( &ctx, ssl->out_ctr, 13 );
- sha1_hmac_update( &ctx, ssl->out_msg, ssl->out_msglen );
- sha1_hmac_finish( &ctx, ssl->out_msg + ssl->out_msglen );
- memset( &ctx, 0, sizeof(sha1_context));
- }
- else if( ssl->transform_out->maclen == 32 )
- {
- sha2_context ctx;
- sha2_hmac_starts( &ctx, ssl->transform_out->mac_enc, 32, 0 );
- sha2_hmac_update( &ctx, ssl->out_ctr, 13 );
- sha2_hmac_update( &ctx, ssl->out_msg, ssl->out_msglen );
- sha2_hmac_finish( &ctx, ssl->out_msg + ssl->out_msglen );
- memset( &ctx, 0, sizeof(sha2_context));
- }
- else if( ssl->transform_out->maclen != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "invalid MAC len: %d",
- ssl->transform_out->maclen ) );
- return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
- }
- }
- SSL_DEBUG_BUF( 4, "computed mac",
- ssl->out_msg + ssl->out_msglen, ssl->transform_out->maclen );
- ssl->out_msglen += ssl->transform_out->maclen;
- if( ssl->transform_out->ivlen == 0 )
- {
- padlen = 0;
- SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
- "including %d bytes of padding",
- ssl->out_msglen, 0 ) );
- SSL_DEBUG_BUF( 4, "before encrypt: output payload",
- ssl->out_msg, ssl->out_msglen );
- #if defined(POLARSSL_ARC4_C)
- if( ssl->session_out->ciphersuite == TLS_RSA_WITH_RC4_128_MD5 ||
- ssl->session_out->ciphersuite == TLS_RSA_WITH_RC4_128_SHA )
- {
- arc4_crypt( (arc4_context *) ssl->transform_out->ctx_enc,
- ssl->out_msglen, ssl->out_msg,
- ssl->out_msg );
- } else
- #endif
- #if defined(POLARSSL_CIPHER_NULL_CIPHER)
- if( ssl->session_out->ciphersuite == TLS_RSA_WITH_NULL_MD5 ||
- ssl->session_out->ciphersuite == TLS_RSA_WITH_NULL_SHA ||
- ssl->session_out->ciphersuite == TLS_RSA_WITH_NULL_SHA256 )
- {
- } else
- #endif
- return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
- }
- else if( ssl->transform_out->ivlen == 12 )
- {
- size_t enc_msglen;
- unsigned char *enc_msg;
- unsigned char add_data[13];
- int ret = POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE;
- padlen = 0;
- enc_msglen = ssl->out_msglen;
- memcpy( add_data, ssl->out_ctr, 8 );
- add_data[8] = ssl->out_msgtype;
- add_data[9] = ssl->major_ver;
- add_data[10] = ssl->minor_ver;
- add_data[11] = ( ssl->out_msglen >> 8 ) & 0xFF;
- add_data[12] = ssl->out_msglen & 0xFF;
- SSL_DEBUG_BUF( 4, "additional data used for AEAD",
- add_data, 13 );
- #if defined(POLARSSL_AES_C) && defined(POLARSSL_GCM_C)
- if( ssl->session_out->ciphersuite == TLS_RSA_WITH_AES_128_GCM_SHA256 ||
- ssl->session_out->ciphersuite == TLS_RSA_WITH_AES_256_GCM_SHA384 ||
- ssl->session_out->ciphersuite == TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 ||
- ssl->session_out->ciphersuite == TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 )
- {
- /*
- * Generate IV
- */
- ret = ssl->f_rng( ssl->p_rng,
- ssl->transform_out->iv_enc + ssl->transform_out->fixed_ivlen,
- ssl->transform_out->ivlen - ssl->transform_out->fixed_ivlen );
- if( ret != 0 )
- return( ret );
- /*
- * Shift message for ivlen bytes and prepend IV
- */
- memmove( ssl->out_msg + ssl->transform_out->ivlen -
- ssl->transform_out->fixed_ivlen,
- ssl->out_msg, ssl->out_msglen );
- memcpy( ssl->out_msg,
- ssl->transform_out->iv_enc + ssl->transform_out->fixed_ivlen,
- ssl->transform_out->ivlen - ssl->transform_out->fixed_ivlen );
- /*
- * Fix pointer positions and message length with added IV
- */
- enc_msg = ssl->out_msg + ssl->transform_out->ivlen -
- ssl->transform_out->fixed_ivlen;
- enc_msglen = ssl->out_msglen;
- ssl->out_msglen += ssl->transform_out->ivlen -
- ssl->transform_out->fixed_ivlen;
- SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
- "including %d bytes of padding",
- ssl->out_msglen, 0 ) );
- SSL_DEBUG_BUF( 4, "before encrypt: output payload",
- ssl->out_msg, ssl->out_msglen );
- /*
- * Adjust for tag
- */
- ssl->out_msglen += 16;
-
- gcm_crypt_and_tag( (gcm_context *) ssl->transform_out->ctx_enc,
- GCM_ENCRYPT, enc_msglen,
- ssl->transform_out->iv_enc, ssl->transform_out->ivlen,
- add_data, 13,
- enc_msg, enc_msg,
- 16, enc_msg + enc_msglen );
- SSL_DEBUG_BUF( 4, "after encrypt: tag",
- enc_msg + enc_msglen, 16 );
- } else
- #endif
- return( ret );
- }
- else
- {
- unsigned char *enc_msg;
- size_t enc_msglen;
- padlen = ssl->transform_out->ivlen - ( ssl->out_msglen + 1 ) %
- ssl->transform_out->ivlen;
- if( padlen == ssl->transform_out->ivlen )
- padlen = 0;
- for( i = 0; i <= padlen; i++ )
- ssl->out_msg[ssl->out_msglen + i] = (unsigned char) padlen;
- ssl->out_msglen += padlen + 1;
- enc_msglen = ssl->out_msglen;
- enc_msg = ssl->out_msg;
- /*
- * Prepend per-record IV for block cipher in TLS v1.1 and up as per
- * Method 1 (6.2.3.2. in RFC4346 and RFC5246)
- */
- if( ssl->minor_ver >= SSL_MINOR_VERSION_2 )
- {
- /*
- * Generate IV
- */
- int ret = ssl->f_rng( ssl->p_rng, ssl->transform_out->iv_enc,
- ssl->transform_out->ivlen );
- if( ret != 0 )
- return( ret );
- /*
- * Shift message for ivlen bytes and prepend IV
- */
- memmove( ssl->out_msg + ssl->transform_out->ivlen, ssl->out_msg,
- ssl->out_msglen );
- memcpy( ssl->out_msg, ssl->transform_out->iv_enc,
- ssl->transform_out->ivlen );
- /*
- * Fix pointer positions and message length with added IV
- */
- enc_msg = ssl->out_msg + ssl->transform_out->ivlen;
- enc_msglen = ssl->out_msglen;
- ssl->out_msglen += ssl->transform_out->ivlen;
- }
- SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
- "including %d bytes of IV and %d bytes of padding",
- ssl->out_msglen, ssl->transform_out->ivlen, padlen + 1 ) );
- SSL_DEBUG_BUF( 4, "before encrypt: output payload",
- ssl->out_msg, ssl->out_msglen );
- switch( ssl->transform_out->ivlen )
- {
- #if defined(POLARSSL_DES_C)
- case 8:
- #if defined(POLARSSL_ENABLE_WEAK_CIPHERSUITES)
- if( ssl->session_out->ciphersuite == TLS_RSA_WITH_DES_CBC_SHA ||
- ssl->session_out->ciphersuite == TLS_DHE_RSA_WITH_DES_CBC_SHA )
- {
- des_crypt_cbc( (des_context *) ssl->transform_out->ctx_enc,
- DES_ENCRYPT, enc_msglen,
- ssl->transform_out->iv_enc, enc_msg, enc_msg );
- }
- else
- #endif
- des3_crypt_cbc( (des3_context *) ssl->transform_out->ctx_enc,
- DES_ENCRYPT, enc_msglen,
- ssl->transform_out->iv_enc, enc_msg, enc_msg );
- break;
- #endif
- case 16:
- #if defined(POLARSSL_AES_C)
- if ( ssl->session_out->ciphersuite == TLS_RSA_WITH_AES_128_CBC_SHA ||
- ssl->session_out->ciphersuite == TLS_DHE_RSA_WITH_AES_128_CBC_SHA ||
- ssl->session_out->ciphersuite == TLS_RSA_WITH_AES_256_CBC_SHA ||
- ssl->session_out->ciphersuite == TLS_DHE_RSA_WITH_AES_256_CBC_SHA ||
- ssl->session_out->ciphersuite == TLS_RSA_WITH_AES_128_CBC_SHA256 ||
- ssl->session_out->ciphersuite == TLS_RSA_WITH_AES_256_CBC_SHA256 ||
- ssl->session_out->ciphersuite == TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 ||
- ssl->session_out->ciphersuite == TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 )
- {
- aes_crypt_cbc( (aes_context *) ssl->transform_out->ctx_enc,
- AES_ENCRYPT, enc_msglen,
- ssl->transform_out->iv_enc, enc_msg, enc_msg);
- break;
- }
- #endif
- #if defined(POLARSSL_CAMELLIA_C)
- if ( ssl->session_out->ciphersuite == TLS_RSA_WITH_CAMELLIA_128_CBC_SHA ||
- ssl->session_out->ciphersuite == TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA ||
- ssl->session_out->ciphersuite == TLS_RSA_WITH_CAMELLIA_256_CBC_SHA ||
- ssl->session_out->ciphersuite == TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA ||
- ssl->session_out->ciphersuite == TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 ||
- ssl->session_out->ciphersuite == TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 ||
- ssl->session_out->ciphersuite == TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 ||
- ssl->session_out->ciphersuite == TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 )
- {
- camellia_crypt_cbc( (camellia_context *) ssl->transform_out->ctx_enc,
- CAMELLIA_ENCRYPT, enc_msglen,
- ssl->transform_out->iv_enc, enc_msg, enc_msg );
- break;
- }
- #endif
- default:
- return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
- }
- }
- for( i = 8; i > 0; i-- )
- if( ++ssl->out_ctr[i - 1] != 0 )
- break;
- SSL_DEBUG_MSG( 2, ( "<= encrypt buf" ) );
- return( 0 );
- }
- /*
- * TODO: Use digest version when integrated!
- */
- #define POLARSSL_SSL_MAX_MAC_SIZE 32
- static int ssl_decrypt_buf( ssl_context *ssl )
- {
- size_t i, padlen = 0, correct = 1;
- unsigned char tmp[POLARSSL_SSL_MAX_MAC_SIZE];
- SSL_DEBUG_MSG( 2, ( "=> decrypt buf" ) );
- if( ssl->in_msglen < ssl->transform_in->minlen )
- {
- SSL_DEBUG_MSG( 1, ( "in_msglen (%d) < minlen (%d)",
- ssl->in_msglen, ssl->transform_in->minlen ) );
- return( POLARSSL_ERR_SSL_INVALID_MAC );
- }
- if( ssl->transform_in->ivlen == 0 )
- {
- #if defined(POLARSSL_ARC4_C)
- if( ssl->session_in->ciphersuite == TLS_RSA_WITH_RC4_128_MD5 ||
- ssl->session_in->ciphersuite == TLS_RSA_WITH_RC4_128_SHA )
- {
- arc4_crypt( (arc4_context *) ssl->transform_in->ctx_dec,
- ssl->in_msglen, ssl->in_msg,
- ssl->in_msg );
- } else
- #endif
- #if defined(POLARSSL_CIPHER_NULL_CIPHER)
- if( ssl->session_in->ciphersuite == TLS_RSA_WITH_NULL_MD5 ||
- ssl->session_in->ciphersuite == TLS_RSA_WITH_NULL_SHA ||
- ssl->session_in->ciphersuite == TLS_RSA_WITH_NULL_SHA256 )
- {
- } else
- #endif
- return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
- }
- else if( ssl->transform_in->ivlen == 12 )
- {
- unsigned char *dec_msg;
- unsigned char *dec_msg_result;
- size_t dec_msglen;
- unsigned char add_data[13];
- int ret = POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE;
- #if defined(POLARSSL_AES_C) && defined(POLARSSL_GCM_C)
- if( ssl->session_in->ciphersuite == TLS_RSA_WITH_AES_128_GCM_SHA256 ||
- ssl->session_in->ciphersuite == TLS_RSA_WITH_AES_256_GCM_SHA384 ||
- ssl->session_in->ciphersuite == TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 ||
- ssl->session_in->ciphersuite == TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 )
- {
- dec_msglen = ssl->in_msglen - ( ssl->transform_in->ivlen -
- ssl->transform_in->fixed_ivlen );
- dec_msglen -= 16;
- dec_msg = ssl->in_msg + ( ssl->transform_in->ivlen -
- ssl->transform_in->fixed_ivlen );
- dec_msg_result = ssl->in_msg;
- ssl->in_msglen = dec_msglen;
- memcpy( add_data, ssl->in_ctr, 8 );
- add_data[8] = ssl->in_msgtype;
- add_data[9] = ssl->major_ver;
- add_data[10] = ssl->minor_ver;
- add_data[11] = ( ssl->in_msglen >> 8 ) & 0xFF;
- add_data[12] = ssl->in_msglen & 0xFF;
- SSL_DEBUG_BUF( 4, "additional data used for AEAD",
- add_data, 13 );
- memcpy( ssl->transform_in->iv_dec + ssl->transform_in->fixed_ivlen,
- ssl->in_msg,
- ssl->transform_in->ivlen - ssl->transform_in->fixed_ivlen );
- SSL_DEBUG_BUF( 4, "IV used", ssl->transform_in->iv_dec,
- ssl->transform_in->ivlen );
- SSL_DEBUG_BUF( 4, "TAG used", dec_msg + dec_msglen, 16 );
- memcpy( ssl->transform_in->iv_dec + ssl->transform_in->fixed_ivlen,
- ssl->in_msg,
- ssl->transform_in->ivlen - ssl->transform_in->fixed_ivlen );
- ret = gcm_auth_decrypt( (gcm_context *) ssl->transform_in->ctx_dec,
- dec_msglen,
- ssl->transform_in->iv_dec,
- ssl->transform_in->ivlen,
- add_data, 13,
- dec_msg + dec_msglen, 16,
- dec_msg, dec_msg_result );
-
- if( ret != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "AEAD decrypt failed on validation (ret = -0x%02x)",
- -ret ) );
- return( POLARSSL_ERR_SSL_INVALID_MAC );
- }
- } else
- #endif
- return( ret );
- }
- else
- {
- /*
- * Decrypt and check the padding
- */
- unsigned char *dec_msg;
- unsigned char *dec_msg_result;
- size_t dec_msglen;
- size_t minlen = 0, fake_padlen;
- /*
- * Check immediate ciphertext sanity
- */
- if( ssl->in_msglen % ssl->transform_in->ivlen != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "msglen (%d) %% ivlen (%d) != 0",
- ssl->in_msglen, ssl->transform_in->ivlen ) );
- return( POLARSSL_ERR_SSL_INVALID_MAC );
- }
- if( ssl->minor_ver >= SSL_MINOR_VERSION_2 )
- minlen += ssl->transform_in->ivlen;
- if( ssl->in_msglen < minlen + ssl->transform_in->ivlen ||
- ssl->in_msglen < minlen + ssl->transform_in->maclen + 1 )
- {
- SSL_DEBUG_MSG( 1, ( "msglen (%d) < max( ivlen(%d), maclen (%d) + 1 ) ( + expl IV )",
- ssl->in_msglen, ssl->transform_in->ivlen, ssl->transform_in->maclen ) );
- return( POLARSSL_ERR_SSL_INVALID_MAC );
- }
- dec_msglen = ssl->in_msglen;
- dec_msg = ssl->in_msg;
- dec_msg_result = ssl->in_msg;
- /*
- * Initialize for prepended IV for block cipher in TLS v1.1 and up
- */
- if( ssl->minor_ver >= SSL_MINOR_VERSION_2 )
- {
- dec_msg += ssl->transform_in->ivlen;
- dec_msglen -= ssl->transform_in->ivlen;
- ssl->in_msglen -= ssl->transform_in->ivlen;
- for( i = 0; i < ssl->transform_in->ivlen; i++ )
- ssl->transform_in->iv_dec[i] = ssl->in_msg[i];
- }
- switch( ssl->transform_in->ivlen )
- {
- #if defined(POLARSSL_DES_C)
- case 8:
- #if defined(POLARSSL_ENABLE_WEAK_CIPHERSUITES)
- if( ssl->session_in->ciphersuite == TLS_RSA_WITH_DES_CBC_SHA ||
- ssl->session_in->ciphersuite == TLS_DHE_RSA_WITH_DES_CBC_SHA )
- {
- des_crypt_cbc( (des_context *) ssl->transform_in->ctx_dec,
- DES_DECRYPT, dec_msglen,
- ssl->transform_in->iv_dec, dec_msg, dec_msg_result );
- }
- else
- #endif
- des3_crypt_cbc( (des3_context *) ssl->transform_in->ctx_dec,
- DES_DECRYPT, dec_msglen,
- ssl->transform_in->iv_dec, dec_msg, dec_msg_result );
- break;
- #endif
- case 16:
- #if defined(POLARSSL_AES_C)
- if ( ssl->session_in->ciphersuite == TLS_RSA_WITH_AES_128_CBC_SHA ||
- ssl->session_in->ciphersuite == TLS_DHE_RSA_WITH_AES_128_CBC_SHA ||
- ssl->session_in->ciphersuite == TLS_RSA_WITH_AES_256_CBC_SHA ||
- ssl->session_in->ciphersuite == TLS_DHE_RSA_WITH_AES_256_CBC_SHA ||
- ssl->session_in->ciphersuite == TLS_RSA_WITH_AES_128_CBC_SHA256 ||
- ssl->session_in->ciphersuite == TLS_RSA_WITH_AES_256_CBC_SHA256 ||
- ssl->session_in->ciphersuite == TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 ||
- ssl->session_in->ciphersuite == TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 )
- {
- aes_crypt_cbc( (aes_context *) ssl->transform_in->ctx_dec,
- AES_DECRYPT, dec_msglen,
- ssl->transform_in->iv_dec, dec_msg, dec_msg_result );
- break;
- }
- #endif
- #if defined(POLARSSL_CAMELLIA_C)
- if ( ssl->session_in->ciphersuite == TLS_RSA_WITH_CAMELLIA_128_CBC_SHA ||
- ssl->session_in->ciphersuite == TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA ||
- ssl->session_in->ciphersuite == TLS_RSA_WITH_CAMELLIA_256_CBC_SHA ||
- ssl->session_in->ciphersuite == TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA ||
- ssl->session_in->ciphersuite == TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 ||
- ssl->session_in->ciphersuite == TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 ||
- ssl->session_in->ciphersuite == TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 ||
- ssl->session_in->ciphersuite == TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 )
- {
- camellia_crypt_cbc( (camellia_context *) ssl->transform_in->ctx_dec,
- CAMELLIA_DECRYPT, dec_msglen,
- ssl->transform_in->iv_dec, dec_msg, dec_msg_result );
- break;
- }
- #endif
- default:
- return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
- }
- padlen = 1 + ssl->in_msg[ssl->in_msglen - 1];
- fake_padlen = 256 - padlen;
- if( ssl->in_msglen < ssl->transform_in->maclen + padlen )
- {
- #if defined(POLARSSL_SSL_DEBUG_ALL)
- SSL_DEBUG_MSG( 1, ( "msglen (%d) < maclen (%d) + padlen (%d)",
- ssl->in_msglen, ssl->transform_in->maclen, padlen ) );
- #endif
- padlen = 0;
- fake_padlen = 256;
- correct = 0;
- }
- if( ssl->minor_ver == SSL_MINOR_VERSION_0 )
- {
- if( padlen > ssl->transform_in->ivlen )
- {
- #if defined(POLARSSL_SSL_DEBUG_ALL)
- SSL_DEBUG_MSG( 1, ( "bad padding length: is %d, "
- "should be no more than %d",
- padlen, ssl->transform_in->ivlen ) );
- #endif
- correct = 0;
- }
- }
- else
- {
- /*
- * TLSv1+: always check the padding up to the first failure
- * and fake check up to 256 bytes of padding
- */
- for( i = 1; i <= padlen; i++ )
- {
- if( ssl->in_msg[ssl->in_msglen - i] != padlen - 1 )
- {
- correct = 0;
- fake_padlen = 256 - i;
- padlen = 0;
- }
- }
- for( i = 1; i <= fake_padlen; i++ )
- {
- if( ssl->in_msg[i + 1] != fake_padlen - 1 )
- minlen = 0;
- else
- minlen = 1;
- }
- #if defined(POLARSSL_SSL_DEBUG_ALL)
- if( padlen > 0 && correct == 0)
- SSL_DEBUG_MSG( 1, ( "bad padding byte detected" ) );
- #endif
- }
- }
- SSL_DEBUG_BUF( 4, "raw buffer after decryption",
- ssl->in_msg, ssl->in_msglen );
- /*
- * Always compute the MAC (RFC4346, CBCTIME).
- */
- ssl->in_msglen -= ( ssl->transform_in->maclen + padlen );
- ssl->in_hdr[3] = (unsigned char)( ssl->in_msglen >> 8 );
- ssl->in_hdr[4] = (unsigned char)( ssl->in_msglen );
- memcpy( tmp, ssl->in_msg + ssl->in_msglen, ssl->transform_in->maclen );
- if( ssl->minor_ver == SSL_MINOR_VERSION_0 )
- {
- if( ssl->transform_in->maclen == 16 )
- ssl_mac_md5( ssl->transform_in->mac_dec,
- ssl->in_msg, ssl->in_msglen,
- ssl->in_ctr, ssl->in_msgtype );
- else if( ssl->transform_in->maclen == 20 )
- ssl_mac_sha1( ssl->transform_in->mac_dec,
- ssl->in_msg, ssl->in_msglen,
- ssl->in_ctr, ssl->in_msgtype );
- else if( ssl->transform_in->maclen == 32 )
- ssl_mac_sha2( ssl->transform_in->mac_dec,
- ssl->in_msg, ssl->in_msglen,
- ssl->in_ctr, ssl->in_msgtype );
- else if( ssl->transform_in->maclen != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "invalid MAC len: %d",
- ssl->transform_in->maclen ) );
- return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
- }
- }
- else
- {
- /*
- * Process MAC and always update for padlen afterwards to make
- * total time independent of padlen
- */
- if( ssl->transform_in->maclen == 16 )
- md5_hmac( ssl->transform_in->mac_dec, 16,
- ssl->in_ctr, ssl->in_msglen + 13,
- ssl->in_msg + ssl->in_msglen );
- else if( ssl->transform_in->maclen == 20 )
- sha1_hmac( ssl->transform_in->mac_dec, 20,
- ssl->in_ctr, ssl->in_msglen + 13,
- ssl->in_msg + ssl->in_msglen );
- else if( ssl->transform_in->maclen == 32 )
- sha2_hmac( ssl->transform_in->mac_dec, 32,
- ssl->in_ctr, ssl->in_msglen + 13,
- ssl->in_msg + ssl->in_msglen, 0 );
- else if( ssl->transform_in->maclen != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "invalid MAC len: %d",
- ssl->transform_in->maclen ) );
- return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
- }
- }
- SSL_DEBUG_BUF( 4, "message mac", tmp, ssl->transform_in->maclen );
- SSL_DEBUG_BUF( 4, "computed mac", ssl->in_msg + ssl->in_msglen,
- ssl->transform_in->maclen );
- if( memcmp( tmp, ssl->in_msg + ssl->in_msglen,
- ssl->transform_in->maclen ) != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "message mac does not match" ) );
- correct = 0;
- }
- /*
- * Finally check the correct flag
- */
- if( correct == 0 )
- return( POLARSSL_ERR_SSL_INVALID_MAC );
- if( ssl->in_msglen == 0 )
- {
- ssl->nb_zero++;
- /*
- * Three or more empty messages may be a DoS attack
- * (excessive CPU consumption).
- */
- if( ssl->nb_zero > 3 )
- {
- SSL_DEBUG_MSG( 1, ( "received four consecutive empty "
- "messages, possible DoS attack" ) );
- return( POLARSSL_ERR_SSL_INVALID_MAC );
- }
- }
- else
- ssl->nb_zero = 0;
-
- for( i = 8; i > 0; i-- )
- if( ++ssl->in_ctr[i - 1] != 0 )
- break;
- SSL_DEBUG_MSG( 2, ( "<= decrypt buf" ) );
- return( 0 );
- }
- #if defined(POLARSSL_ZLIB_SUPPORT)
- /*
- * Compression/decompression functions
- */
- static int ssl_compress_buf( ssl_context *ssl )
- {
- int ret;
- unsigned char *msg_post = ssl->out_msg;
- size_t len_pre = ssl->out_msglen;
- unsigned char *msg_pre;
- SSL_DEBUG_MSG( 2, ( "=> compress buf" ) );
- msg_pre = (unsigned char*) malloc( len_pre );
- if( msg_pre == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "malloc(%d bytes) failed", len_pre ) );
- return( POLARSSL_ERR_SSL_MALLOC_FAILED );
- }
- memcpy( msg_pre, ssl->out_msg, len_pre );
- SSL_DEBUG_MSG( 3, ( "before compression: msglen = %d, ",
- ssl->out_msglen ) );
- SSL_DEBUG_BUF( 4, "before compression: output payload",
- ssl->out_msg, ssl->out_msglen );
- ssl->transform_out->ctx_deflate.next_in = msg_pre;
- ssl->transform_out->ctx_deflate.avail_in = len_pre;
- ssl->transform_out->ctx_deflate.next_out = msg_post;
- ssl->transform_out->ctx_deflate.avail_out = SSL_BUFFER_LEN;
- ret = deflate( &ssl->transform_out->ctx_deflate, Z_SYNC_FLUSH );
- if( ret != Z_OK )
- {
- SSL_DEBUG_MSG( 1, ( "failed to perform compression (%d)", ret ) );
- return( POLARSSL_ERR_SSL_COMPRESSION_FAILED );
- }
- ssl->out_msglen = SSL_BUFFER_LEN - ssl->transform_out->ctx_deflate.avail_out;
- free( msg_pre );
- SSL_DEBUG_MSG( 3, ( "after compression: msglen = %d, ",
- ssl->out_msglen ) );
- SSL_DEBUG_BUF( 4, "after compression: output payload",
- ssl->out_msg, ssl->out_msglen );
- SSL_DEBUG_MSG( 2, ( "<= compress buf" ) );
- return( 0 );
- }
- static int ssl_decompress_buf( ssl_context *ssl )
- {
- int ret;
- unsigned char *msg_post = ssl->in_msg;
- size_t len_pre = ssl->in_msglen;
- unsigned char *msg_pre;
- SSL_DEBUG_MSG( 2, ( "=> decompress buf" ) );
- msg_pre = (unsigned char*) malloc( len_pre );
- if( msg_pre == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "malloc(%d bytes) failed", len_pre ) );
- return( POLARSSL_ERR_SSL_MALLOC_FAILED );
- }
- memcpy( msg_pre, ssl->in_msg, len_pre );
- SSL_DEBUG_MSG( 3, ( "before decompression: msglen = %d, ",
- ssl->in_msglen ) );
- SSL_DEBUG_BUF( 4, "before decompression: input payload",
- ssl->in_msg, ssl->in_msglen );
- ssl->transform_in->ctx_inflate.next_in = msg_pre;
- ssl->transform_in->ctx_inflate.avail_in = len_pre;
- ssl->transform_in->ctx_inflate.next_out = msg_post;
- ssl->transform_in->ctx_inflate.avail_out = SSL_MAX_CONTENT_LEN;
- ret = inflate( &ssl->transform_in->ctx_inflate, Z_SYNC_FLUSH );
- if( ret != Z_OK )
- {
- SSL_DEBUG_MSG( 1, ( "failed to perform decompression (%d)", ret ) );
- return( POLARSSL_ERR_SSL_COMPRESSION_FAILED );
- }
- ssl->in_msglen = SSL_MAX_CONTENT_LEN - ssl->transform_in->ctx_inflate.avail_out;
- free( msg_pre );
- SSL_DEBUG_MSG( 3, ( "after decompression: msglen = %d, ",
- ssl->in_msglen ) );
- SSL_DEBUG_BUF( 4, "after decompression: input payload",
- ssl->in_msg, ssl->in_msglen );
- SSL_DEBUG_MSG( 2, ( "<= decompress buf" ) );
- return( 0 );
- }
- #endif /* POLARSSL_ZLIB_SUPPORT */
- /*
- * Fill the input message buffer
- */
- int ssl_fetch_input( ssl_context *ssl, size_t nb_want )
- {
- int ret;
- size_t len;
- SSL_DEBUG_MSG( 2, ( "=> fetch input" ) );
- while( ssl->in_left < nb_want )
- {
- len = nb_want - ssl->in_left;
- ret = ssl->f_recv( ssl->p_recv, ssl->in_hdr + ssl->in_left, len );
- SSL_DEBUG_MSG( 2, ( "in_left: %d, nb_want: %d",
- ssl->in_left, nb_want ) );
- SSL_DEBUG_RET( 2, "ssl->f_recv", ret );
- if( ret == 0 )
- return( POLARSSL_ERR_SSL_CONN_EOF );
- if( ret < 0 )
- return( ret );
- ssl->in_left += ret;
- }
- SSL_DEBUG_MSG( 2, ( "<= fetch input" ) );
- return( 0 );
- }
- /*
- * Flush any data not yet written
- */
- int ssl_flush_output( ssl_context *ssl )
- {
- int ret;
- unsigned char *buf;
- SSL_DEBUG_MSG( 2, ( "=> flush output" ) );
- while( ssl->out_left > 0 )
- {
- SSL_DEBUG_MSG( 2, ( "message length: %d, out_left: %d",
- 5 + ssl->out_msglen, ssl->out_left ) );
- if( ssl->out_msglen < ssl->out_left )
- {
- size_t header_left = ssl->out_left - ssl->out_msglen;
- buf = ssl->out_hdr + 5 - header_left;
- ret = ssl->f_send( ssl->p_send, buf, header_left );
-
- SSL_DEBUG_RET( 2, "ssl->f_send (header)", ret );
- if( ret <= 0 )
- return( ret );
- ssl->out_left -= ret;
- }
-
- buf = ssl->out_msg + ssl->out_msglen - ssl->out_left;
- ret = ssl->f_send( ssl->p_send, buf, ssl->out_left );
- SSL_DEBUG_RET( 2, "ssl->f_send", ret );
- if( ret <= 0 )
- return( ret );
- ssl->out_left -= ret;
- }
- SSL_DEBUG_MSG( 2, ( "<= flush output" ) );
- return( 0 );
- }
- /*
- * Record layer functions
- */
- int ssl_write_record( ssl_context *ssl )
- {
- int ret, done = 0;
- size_t len = ssl->out_msglen;
- SSL_DEBUG_MSG( 2, ( "=> write record" ) );
- if( ssl->out_msgtype == SSL_MSG_HANDSHAKE )
- {
- ssl->out_msg[1] = (unsigned char)( ( len - 4 ) >> 16 );
- ssl->out_msg[2] = (unsigned char)( ( len - 4 ) >> 8 );
- ssl->out_msg[3] = (unsigned char)( ( len - 4 ) );
- ssl->handshake->update_checksum( ssl, ssl->out_msg, len );
- }
- #if defined(POLARSSL_ZLIB_SUPPORT)
- if( ssl->transform_out != NULL &&
- ssl->session_out->compression == SSL_COMPRESS_DEFLATE )
- {
- if( ( ret = ssl_compress_buf( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_compress_buf", ret );
- return( ret );
- }
- len = ssl->out_msglen;
- }
- #endif /*POLARSSL_ZLIB_SUPPORT */
- #if defined(POLARSSL_SSL_HW_RECORD_ACCEL)
- if( ssl_hw_record_write != NULL)
- {
- SSL_DEBUG_MSG( 2, ( "going for ssl_hw_record_write()" ) );
- ret = ssl_hw_record_write( ssl );
- if( ret != 0 && ret != POLARSSL_ERR_SSL_HW_ACCEL_FALLTHROUGH )
- {
- SSL_DEBUG_RET( 1, "ssl_hw_record_write", ret );
- return POLARSSL_ERR_SSL_HW_ACCEL_FAILED;
- }
- done = 1;
- }
- #endif
- if( !done )
- {
- ssl->out_hdr[0] = (unsigned char) ssl->out_msgtype;
- ssl->out_hdr[1] = (unsigned char) ssl->major_ver;
- ssl->out_hdr[2] = (unsigned char) ssl->minor_ver;
- ssl->out_hdr[3] = (unsigned char)( len >> 8 );
- ssl->out_hdr[4] = (unsigned char)( len );
- if( ssl->transform_out != NULL )
- {
- if( ( ret = ssl_encrypt_buf( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_encrypt_buf", ret );
- return( ret );
- }
- len = ssl->out_msglen;
- ssl->out_hdr[3] = (unsigned char)( len >> 8 );
- ssl->out_hdr[4] = (unsigned char)( len );
- }
- ssl->out_left = 5 + ssl->out_msglen;
- SSL_DEBUG_MSG( 3, ( "output record: msgtype = %d, "
- "version = [%d:%d], msglen = %d",
- ssl->out_hdr[0], ssl->out_hdr[1], ssl->out_hdr[2],
- ( ssl->out_hdr[3] << 8 ) | ssl->out_hdr[4] ) );
- SSL_DEBUG_BUF( 4, "output record header sent to network",
- ssl->out_hdr, 5 );
- SSL_DEBUG_BUF( 4, "output record sent to network",
- ssl->out_hdr + 32, ssl->out_msglen );
- }
- if( ( ret = ssl_flush_output( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_flush_output", ret );
- return( ret );
- }
- SSL_DEBUG_MSG( 2, ( "<= write record" ) );
- return( 0 );
- }
- int ssl_read_record( ssl_context *ssl )
- {
- int ret, done = 0;
- SSL_DEBUG_MSG( 2, ( "=> read record" ) );
- if( ssl->in_hslen != 0 &&
- ssl->in_hslen < ssl->in_msglen )
- {
- /*
- * Get next Handshake message in the current record
- */
- ssl->in_msglen -= ssl->in_hslen;
- memmove( ssl->in_msg, ssl->in_msg + ssl->in_hslen,
- ssl->in_msglen );
- ssl->in_hslen = 4;
- ssl->in_hslen += ( ssl->in_msg[2] << 8 ) | ssl->in_msg[3];
- SSL_DEBUG_MSG( 3, ( "handshake message: msglen ="
- " %d, type = %d, hslen = %d",
- ssl->in_msglen, ssl->in_msg[0], ssl->in_hslen ) );
- if( ssl->in_msglen < 4 || ssl->in_msg[1] != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "bad handshake length" ) );
- return( POLARSSL_ERR_SSL_INVALID_RECORD );
- }
- if( ssl->in_msglen < ssl->in_hslen )
- {
- SSL_DEBUG_MSG( 1, ( "bad handshake length" ) );
- return( POLARSSL_ERR_SSL_INVALID_RECORD );
- }
- ssl->handshake->update_checksum( ssl, ssl->in_msg, ssl->in_hslen );
- return( 0 );
- }
- ssl->in_hslen = 0;
- /*
- * Read the record header and validate it
- */
- if( ( ret = ssl_fetch_input( ssl, 5 ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_fetch_input", ret );
- return( ret );
- }
- ssl->in_msgtype = ssl->in_hdr[0];
- ssl->in_msglen = ( ssl->in_hdr[3] << 8 ) | ssl->in_hdr[4];
- SSL_DEBUG_MSG( 3, ( "input record: msgtype = %d, "
- "version = [%d:%d], msglen = %d",
- ssl->in_hdr[0], ssl->in_hdr[1], ssl->in_hdr[2],
- ( ssl->in_hdr[3] << 8 ) | ssl->in_hdr[4] ) );
- if( ssl->in_hdr[1] != ssl->major_ver )
- {
- SSL_DEBUG_MSG( 1, ( "major version mismatch" ) );
- return( POLARSSL_ERR_SSL_INVALID_RECORD );
- }
- if( ssl->in_hdr[2] > ssl->max_minor_ver )
- {
- SSL_DEBUG_MSG( 1, ( "minor version mismatch" ) );
- return( POLARSSL_ERR_SSL_INVALID_RECORD );
- }
- /*
- * Make sure the message length is acceptable
- */
- if( ssl->transform_in == NULL )
- {
- if( ssl->in_msglen < 1 ||
- ssl->in_msglen > SSL_MAX_CONTENT_LEN )
- {
- SSL_DEBUG_MSG( 1, ( "bad message length" ) );
- return( POLARSSL_ERR_SSL_INVALID_RECORD );
- }
- }
- else
- {
- if( ssl->in_msglen < ssl->transform_in->minlen )
- {
- SSL_DEBUG_MSG( 1, ( "bad message length" ) );
- return( POLARSSL_ERR_SSL_INVALID_RECORD );
- }
- if( ssl->minor_ver == SSL_MINOR_VERSION_0 &&
- ssl->in_msglen > ssl->transform_in->minlen + SSL_MAX_CONTENT_LEN )
- {
- SSL_DEBUG_MSG( 1, ( "bad message length" ) );
- return( POLARSSL_ERR_SSL_INVALID_RECORD );
- }
- /*
- * TLS encrypted messages can have up to 256 bytes of padding
- */
- if( ssl->minor_ver >= SSL_MINOR_VERSION_1 &&
- ssl->in_msglen > ssl->transform_in->minlen + SSL_MAX_CONTENT_LEN + 256 )
- {
- SSL_DEBUG_MSG( 1, ( "bad message length" ) );
- return( POLARSSL_ERR_SSL_INVALID_RECORD );
- }
- }
- /*
- * Read and optionally decrypt the message contents
- */
- if( ( ret = ssl_fetch_input( ssl, 5 + ssl->in_msglen ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_fetch_input", ret );
- return( ret );
- }
- SSL_DEBUG_BUF( 4, "input record from network",
- ssl->in_hdr, 5 + ssl->in_msglen );
- #if defined(POLARSSL_SSL_HW_RECORD_ACCEL)
- if( ssl_hw_record_read != NULL)
- {
- SSL_DEBUG_MSG( 2, ( "going for ssl_hw_record_read()" ) );
- ret = ssl_hw_record_read( ssl );
- if( ret != 0 && ret != POLARSSL_ERR_SSL_HW_ACCEL_FALLTHROUGH )
- {
- SSL_DEBUG_RET( 1, "ssl_hw_record_read", ret );
- return POLARSSL_ERR_SSL_HW_ACCEL_FAILED;
- }
- done = 1;
- }
- #endif
- if( !done && ssl->transform_in != NULL )
- {
- if( ( ret = ssl_decrypt_buf( ssl ) ) != 0 )
- {
- #if defined(POLARSSL_SSL_ALERT_MESSAGES)
- if( ret == POLARSSL_ERR_SSL_INVALID_MAC )
- {
- ssl_send_alert_message( ssl,
- SSL_ALERT_LEVEL_FATAL,
- SSL_ALERT_MSG_BAD_RECORD_MAC );
- }
- #endif
- SSL_DEBUG_RET( 1, "ssl_decrypt_buf", ret );
- return( ret );
- }
- SSL_DEBUG_BUF( 4, "input payload after decrypt",
- ssl->in_msg, ssl->in_msglen );
- if( ssl->in_msglen > SSL_MAX_CONTENT_LEN )
- {
- SSL_DEBUG_MSG( 1, ( "bad message length" ) );
- return( POLARSSL_ERR_SSL_INVALID_RECORD );
- }
- }
- #if defined(POLARSSL_ZLIB_SUPPORT)
- if( ssl->transform_in != NULL &&
- ssl->session_in->compression == SSL_COMPRESS_DEFLATE )
- {
- if( ( ret = ssl_decompress_buf( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_decompress_buf", ret );
- return( ret );
- }
- ssl->in_hdr[3] = (unsigned char)( ssl->in_msglen >> 8 );
- ssl->in_hdr[4] = (unsigned char)( ssl->in_msglen );
- }
- #endif /* POLARSSL_ZLIB_SUPPORT */
- if( ssl->in_msgtype != SSL_MSG_HANDSHAKE &&
- ssl->in_msgtype != SSL_MSG_ALERT &&
- ssl->in_msgtype != SSL_MSG_CHANGE_CIPHER_SPEC &&
- ssl->in_msgtype != SSL_MSG_APPLICATION_DATA )
- {
- SSL_DEBUG_MSG( 1, ( "unknown record type" ) );
- if( ( ret = ssl_send_alert_message( ssl,
- SSL_ALERT_LEVEL_FATAL,
- SSL_ALERT_MSG_UNEXPECTED_MESSAGE ) ) != 0 )
- {
- return( ret );
- }
- return( POLARSSL_ERR_SSL_INVALID_RECORD );
- }
- if( ssl->in_msgtype == SSL_MSG_HANDSHAKE )
- {
- ssl->in_hslen = 4;
- ssl->in_hslen += ( ssl->in_msg[2] << 8 ) | ssl->in_msg[3];
- SSL_DEBUG_MSG( 3, ( "handshake message: msglen ="
- " %d, type = %d, hslen = %d",
- ssl->in_msglen, ssl->in_msg[0], ssl->in_hslen ) );
- /*
- * Additional checks to validate the handshake header
- */
- if( ssl->in_msglen < 4 || ssl->in_msg[1] != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "bad handshake length" ) );
- return( POLARSSL_ERR_SSL_INVALID_RECORD );
- }
- if( ssl->in_msglen < ssl->in_hslen )
- {
- SSL_DEBUG_MSG( 1, ( "bad handshake length" ) );
- return( POLARSSL_ERR_SSL_INVALID_RECORD );
- }
- if( ssl->state != SSL_HANDSHAKE_OVER )
- ssl->handshake->update_checksum( ssl, ssl->in_msg, ssl->in_hslen );
- }
- if( ssl->in_msgtype == SSL_MSG_ALERT )
- {
- SSL_DEBUG_MSG( 2, ( "got an alert message, type: [%d:%d]",
- ssl->in_msg[0], ssl->in_msg[1] ) );
- /*
- * Ignore non-fatal alerts, except close_notify
- */
- if( ssl->in_msg[0] == SSL_ALERT_LEVEL_FATAL )
- {
- SSL_DEBUG_MSG( 1, ( "is a fatal alert message (msg %d)",
- ssl->in_msg[1] ) );
- /**
- * Subtract from error code as ssl->in_msg[1] is 7-bit positive
- * error identifier.
- */
- return( POLARSSL_ERR_SSL_FATAL_ALERT_MESSAGE );
- }
- if( ssl->in_msg[0] == SSL_ALERT_LEVEL_WARNING &&
- ssl->in_msg[1] == SSL_ALERT_MSG_CLOSE_NOTIFY )
- {
- SSL_DEBUG_MSG( 2, ( "is a close notify message" ) );
- return( POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY );
- }
- }
- ssl->in_left = 0;
- SSL_DEBUG_MSG( 2, ( "<= read record" ) );
- return( 0 );
- }
- int ssl_send_fatal_handshake_failure( ssl_context *ssl )
- {
- int ret;
- if( ( ret = ssl_send_alert_message( ssl,
- SSL_ALERT_LEVEL_FATAL,
- SSL_ALERT_MSG_HANDSHAKE_FAILURE ) ) != 0 )
- {
- return( ret );
- }
- return( 0 );
- }
- int ssl_send_alert_message( ssl_context *ssl,
- unsigned char level,
- unsigned char message )
- {
- int ret;
- SSL_DEBUG_MSG( 2, ( "=> send alert message" ) );
- ssl->out_msgtype = SSL_MSG_ALERT;
- ssl->out_msglen = 2;
- ssl->out_msg[0] = level;
- ssl->out_msg[1] = message;
- if( ( ret = ssl_write_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_write_record", ret );
- return( ret );
- }
- SSL_DEBUG_MSG( 2, ( "<= send alert message" ) );
- return( 0 );
- }
- /*
- * Handshake functions
- */
- int ssl_write_certificate( ssl_context *ssl )
- {
- int ret;
- size_t i, n;
- const x509_cert *crt;
- SSL_DEBUG_MSG( 2, ( "=> write certificate" ) );
- if( ssl->endpoint == SSL_IS_CLIENT )
- {
- if( ssl->client_auth == 0 )
- {
- SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
- ssl->state++;
- return( 0 );
- }
- /*
- * If using SSLv3 and got no cert, send an Alert message
- * (otherwise an empty Certificate message will be sent).
- */
- if( ssl->own_cert == NULL &&
- ssl->minor_ver == SSL_MINOR_VERSION_0 )
- {
- ssl->out_msglen = 2;
- ssl->out_msgtype = SSL_MSG_ALERT;
- ssl->out_msg[0] = SSL_ALERT_LEVEL_WARNING;
- ssl->out_msg[1] = SSL_ALERT_MSG_NO_CERT;
- SSL_DEBUG_MSG( 2, ( "got no certificate to send" ) );
- goto write_msg;
- }
- }
- else /* SSL_IS_SERVER */
- {
- if( ssl->own_cert == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "got no certificate to send" ) );
- return( POLARSSL_ERR_SSL_CERTIFICATE_REQUIRED );
- }
- }
- SSL_DEBUG_CRT( 3, "own certificate", ssl->own_cert );
- /*
- * 0 . 0 handshake type
- * 1 . 3 handshake length
- * 4 . 6 length of all certs
- * 7 . 9 length of cert. 1
- * 10 . n-1 peer certificate
- * n . n+2 length of cert. 2
- * n+3 . ... upper level cert, etc.
- */
- i = 7;
- crt = ssl->own_cert;
- while( crt != NULL )
- {
- n = crt->raw.len;
- if( i + 3 + n > SSL_MAX_CONTENT_LEN )
- {
- SSL_DEBUG_MSG( 1, ( "certificate too large, %d > %d",
- i + 3 + n, SSL_MAX_CONTENT_LEN ) );
- return( POLARSSL_ERR_SSL_CERTIFICATE_TOO_LARGE );
- }
- ssl->out_msg[i ] = (unsigned char)( n >> 16 );
- ssl->out_msg[i + 1] = (unsigned char)( n >> 8 );
- ssl->out_msg[i + 2] = (unsigned char)( n );
- i += 3; memcpy( ssl->out_msg + i, crt->raw.p, n );
- i += n; crt = crt->next;
- }
- ssl->out_msg[4] = (unsigned char)( ( i - 7 ) >> 16 );
- ssl->out_msg[5] = (unsigned char)( ( i - 7 ) >> 8 );
- ssl->out_msg[6] = (unsigned char)( ( i - 7 ) );
- ssl->out_msglen = i;
- ssl->out_msgtype = SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = SSL_HS_CERTIFICATE;
- write_msg:
- ssl->state++;
- if( ( ret = ssl_write_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_write_record", ret );
- return( ret );
- }
- SSL_DEBUG_MSG( 2, ( "<= write certificate" ) );
- return( 0 );
- }
- int ssl_parse_certificate( ssl_context *ssl )
- {
- int ret;
- size_t i, n;
- SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
- if( ssl->endpoint == SSL_IS_SERVER &&
- ssl->authmode == SSL_VERIFY_NONE )
- {
- ssl->verify_result = BADCERT_SKIP_VERIFY;
- SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
- ssl->state++;
- return( 0 );
- }
- if( ( ret = ssl_read_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_read_record", ret );
- return( ret );
- }
- ssl->state++;
- /*
- * Check if the client sent an empty certificate
- */
- if( ssl->endpoint == SSL_IS_SERVER &&
- ssl->minor_ver == SSL_MINOR_VERSION_0 )
- {
- if( ssl->in_msglen == 2 &&
- ssl->in_msgtype == SSL_MSG_ALERT &&
- ssl->in_msg[0] == SSL_ALERT_LEVEL_WARNING &&
- ssl->in_msg[1] == SSL_ALERT_MSG_NO_CERT )
- {
- SSL_DEBUG_MSG( 1, ( "SSLv3 client has no certificate" ) );
- ssl->verify_result = BADCERT_MISSING;
- if( ssl->authmode == SSL_VERIFY_OPTIONAL )
- return( 0 );
- else
- return( POLARSSL_ERR_SSL_NO_CLIENT_CERTIFICATE );
- }
- }
- if( ssl->endpoint == SSL_IS_SERVER &&
- ssl->minor_ver != SSL_MINOR_VERSION_0 )
- {
- if( ssl->in_hslen == 7 &&
- ssl->in_msgtype == SSL_MSG_HANDSHAKE &&
- ssl->in_msg[0] == SSL_HS_CERTIFICATE &&
- memcmp( ssl->in_msg + 4, "\0\0\0", 3 ) == 0 )
- {
- SSL_DEBUG_MSG( 1, ( "TLSv1 client has no certificate" ) );
- ssl->verify_result = BADCERT_MISSING;
- if( ssl->authmode == SSL_VERIFY_REQUIRED )
- return( POLARSSL_ERR_SSL_NO_CLIENT_CERTIFICATE );
- else
- return( 0 );
- }
- }
- if( ssl->in_msgtype != SSL_MSG_HANDSHAKE )
- {
- SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
- return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
- }
- if( ssl->in_msg[0] != SSL_HS_CERTIFICATE || ssl->in_hslen < 10 )
- {
- SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE );
- }
- /*
- * Same message structure as in ssl_write_certificate()
- */
- n = ( ssl->in_msg[5] << 8 ) | ssl->in_msg[6];
- if( ssl->in_msg[4] != 0 || ssl->in_hslen != 7 + n )
- {
- SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE );
- }
- if( ( ssl->session_negotiate->peer_cert = (x509_cert *) malloc(
- sizeof( x509_cert ) ) ) == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "malloc(%d bytes) failed",
- sizeof( x509_cert ) ) );
- return( POLARSSL_ERR_SSL_MALLOC_FAILED );
- }
- memset( ssl->session_negotiate->peer_cert, 0, sizeof( x509_cert ) );
- i = 7;
- while( i < ssl->in_hslen )
- {
- if( ssl->in_msg[i] != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE );
- }
- n = ( (unsigned int) ssl->in_msg[i + 1] << 8 )
- | (unsigned int) ssl->in_msg[i + 2];
- i += 3;
- if( n < 128 || i + n > ssl->in_hslen )
- {
- SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE );
- }
- ret = x509parse_crt( ssl->session_negotiate->peer_cert, ssl->in_msg + i,
- n );
- if( ret != 0 )
- {
- SSL_DEBUG_RET( 1, " x509parse_crt", ret );
- return( ret );
- }
- i += n;
- }
- SSL_DEBUG_CRT( 3, "peer certificate", ssl->session_negotiate->peer_cert );
- if( ssl->authmode != SSL_VERIFY_NONE )
- {
- if( ssl->ca_chain == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "got no CA chain" ) );
- return( POLARSSL_ERR_SSL_CA_CHAIN_REQUIRED );
- }
- ret = x509parse_verify( ssl->session_negotiate->peer_cert,
- ssl->ca_chain, ssl->ca_crl,
- ssl->peer_cn, &ssl->verify_result,
- ssl->f_vrfy, ssl->p_vrfy );
- if( ret != 0 )
- SSL_DEBUG_RET( 1, "x509_verify_cert", ret );
- if( ssl->authmode != SSL_VERIFY_REQUIRED )
- ret = 0;
- }
- SSL_DEBUG_MSG( 2, ( "<= parse certificate" ) );
- return( ret );
- }
- int ssl_write_change_cipher_spec( ssl_context *ssl )
- {
- int ret;
- SSL_DEBUG_MSG( 2, ( "=> write change cipher spec" ) );
- ssl->out_msgtype = SSL_MSG_CHANGE_CIPHER_SPEC;
- ssl->out_msglen = 1;
- ssl->out_msg[0] = 1;
- ssl->state++;
- if( ( ret = ssl_write_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_write_record", ret );
- return( ret );
- }
- SSL_DEBUG_MSG( 2, ( "<= write change cipher spec" ) );
- return( 0 );
- }
- int ssl_parse_change_cipher_spec( ssl_context *ssl )
- {
- int ret;
- SSL_DEBUG_MSG( 2, ( "=> parse change cipher spec" ) );
- if( ( ret = ssl_read_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_read_record", ret );
- return( ret );
- }
- if( ssl->in_msgtype != SSL_MSG_CHANGE_CIPHER_SPEC )
- {
- SSL_DEBUG_MSG( 1, ( "bad change cipher spec message" ) );
- return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
- }
- if( ssl->in_msglen != 1 || ssl->in_msg[0] != 1 )
- {
- SSL_DEBUG_MSG( 1, ( "bad change cipher spec message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_CHANGE_CIPHER_SPEC );
- }
- ssl->state++;
- SSL_DEBUG_MSG( 2, ( "<= parse change cipher spec" ) );
- return( 0 );
- }
- void ssl_optimize_checksum( ssl_context *ssl, int ciphersuite )
- {
- #if !defined(POLARSSL_SHA4_C)
- ((void) ciphersuite);
- #endif
- if( ssl->minor_ver < SSL_MINOR_VERSION_3 )
- ssl->handshake->update_checksum = ssl_update_checksum_md5sha1;
- #if defined(POLARSSL_SHA4_C)
- else if ( ciphersuite == TLS_RSA_WITH_AES_256_GCM_SHA384 ||
- ciphersuite == TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 )
- {
- ssl->handshake->update_checksum = ssl_update_checksum_sha384;
- }
- #endif
- else
- ssl->handshake->update_checksum = ssl_update_checksum_sha256;
- }
-
- static void ssl_update_checksum_start( ssl_context *ssl, unsigned char *buf,
- size_t len )
- {
- md5_update( &ssl->handshake->fin_md5 , buf, len );
- sha1_update( &ssl->handshake->fin_sha1, buf, len );
- sha2_update( &ssl->handshake->fin_sha2, buf, len );
- #if defined(POLARSSL_SHA4_C)
- sha4_update( &ssl->handshake->fin_sha4, buf, len );
- #endif
- }
- static void ssl_update_checksum_md5sha1( ssl_context *ssl, unsigned char *buf,
- size_t len )
- {
- md5_update( &ssl->handshake->fin_md5 , buf, len );
- sha1_update( &ssl->handshake->fin_sha1, buf, len );
- }
- static void ssl_update_checksum_sha256( ssl_context *ssl, unsigned char *buf,
- size_t len )
- {
- sha2_update( &ssl->handshake->fin_sha2, buf, len );
- }
- #if defined(POLARSSL_SHA4_C)
- static void ssl_update_checksum_sha384( ssl_context *ssl, unsigned char *buf,
- size_t len )
- {
- sha4_update( &ssl->handshake->fin_sha4, buf, len );
- }
- #endif
- static void ssl_calc_finished_ssl(
- ssl_context *ssl, unsigned char *buf, int from )
- {
- char *sender;
- md5_context md5;
- sha1_context sha1;
- unsigned char padbuf[48];
- unsigned char md5sum[16];
- unsigned char sha1sum[20];
- ssl_session *session = ssl->session_negotiate;
- if( !session )
- session = ssl->session;
- SSL_DEBUG_MSG( 2, ( "=> calc finished ssl" ) );
- memcpy( &md5 , &ssl->handshake->fin_md5 , sizeof(md5_context) );
- memcpy( &sha1, &ssl->handshake->fin_sha1, sizeof(sha1_context) );
- /*
- * SSLv3:
- * hash =
- * MD5( master + pad2 +
- * MD5( handshake + sender + master + pad1 ) )
- * + SHA1( master + pad2 +
- * SHA1( handshake + sender + master + pad1 ) )
- */
- SSL_DEBUG_BUF( 4, "finished md5 state", (unsigned char *)
- md5.state, sizeof( md5.state ) );
- SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *)
- sha1.state, sizeof( sha1.state ) );
- sender = ( from == SSL_IS_CLIENT ) ? (char *) "CLNT"
- : (char *) "SRVR";
- memset( padbuf, 0x36, 48 );
- md5_update( &md5, (unsigned char *) sender, 4 );
- md5_update( &md5, session->master, 48 );
- md5_update( &md5, padbuf, 48 );
- md5_finish( &md5, md5sum );
- sha1_update( &sha1, (unsigned char *) sender, 4 );
- sha1_update( &sha1, session->master, 48 );
- sha1_update( &sha1, padbuf, 40 );
- sha1_finish( &sha1, sha1sum );
- memset( padbuf, 0x5C, 48 );
- md5_starts( &md5 );
- md5_update( &md5, session->master, 48 );
- md5_update( &md5, padbuf, 48 );
- md5_update( &md5, md5sum, 16 );
- md5_finish( &md5, buf );
- sha1_starts( &sha1 );
- sha1_update( &sha1, session->master, 48 );
- sha1_update( &sha1, padbuf , 40 );
- sha1_update( &sha1, sha1sum, 20 );
- sha1_finish( &sha1, buf + 16 );
- SSL_DEBUG_BUF( 3, "calc finished result", buf, 36 );
- memset( &md5, 0, sizeof( md5_context ) );
- memset( &sha1, 0, sizeof( sha1_context ) );
- memset( padbuf, 0, sizeof( padbuf ) );
- memset( md5sum, 0, sizeof( md5sum ) );
- memset( sha1sum, 0, sizeof( sha1sum ) );
- SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
- }
- static void ssl_calc_finished_tls(
- ssl_context *ssl, unsigned char *buf, int from )
- {
- int len = 12;
- char *sender;
- md5_context md5;
- sha1_context sha1;
- unsigned char padbuf[36];
- ssl_session *session = ssl->session_negotiate;
- if( !session )
- session = ssl->session;
- SSL_DEBUG_MSG( 2, ( "=> calc finished tls" ) );
- memcpy( &md5 , &ssl->handshake->fin_md5 , sizeof(md5_context) );
- memcpy( &sha1, &ssl->handshake->fin_sha1, sizeof(sha1_context) );
- /*
- * TLSv1:
- * hash = PRF( master, finished_label,
- * MD5( handshake ) + SHA1( handshake ) )[0..11]
- */
- SSL_DEBUG_BUF( 4, "finished md5 state", (unsigned char *)
- md5.state, sizeof( md5.state ) );
- SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *)
- sha1.state, sizeof( sha1.state ) );
- sender = ( from == SSL_IS_CLIENT )
- ? (char *) "client finished"
- : (char *) "server finished";
- md5_finish( &md5, padbuf );
- sha1_finish( &sha1, padbuf + 16 );
- ssl->handshake->tls_prf( session->master, 48, sender,
- padbuf, 36, buf, len );
- SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
- memset( &md5, 0, sizeof( md5_context ) );
- memset( &sha1, 0, sizeof( sha1_context ) );
- memset( padbuf, 0, sizeof( padbuf ) );
- SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
- }
- static void ssl_calc_finished_tls_sha256(
- ssl_context *ssl, unsigned char *buf, int from )
- {
- int len = 12;
- char *sender;
- sha2_context sha2;
- unsigned char padbuf[32];
- ssl_session *session = ssl->session_negotiate;
- if( !session )
- session = ssl->session;
- SSL_DEBUG_MSG( 2, ( "=> calc finished tls sha256" ) );
- memcpy( &sha2, &ssl->handshake->fin_sha2, sizeof(sha2_context) );
- /*
- * TLSv1.2:
- * hash = PRF( master, finished_label,
- * Hash( handshake ) )[0.11]
- */
- SSL_DEBUG_BUF( 4, "finished sha2 state", (unsigned char *)
- sha2.state, sizeof( sha2.state ) );
- sender = ( from == SSL_IS_CLIENT )
- ? (char *) "client finished"
- : (char *) "server finished";
- sha2_finish( &sha2, padbuf );
- ssl->handshake->tls_prf( session->master, 48, sender,
- padbuf, 32, buf, len );
- SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
- memset( &sha2, 0, sizeof( sha2_context ) );
- memset( padbuf, 0, sizeof( padbuf ) );
- SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
- }
- #if defined(POLARSSL_SHA4_C)
- static void ssl_calc_finished_tls_sha384(
- ssl_context *ssl, unsigned char *buf, int from )
- {
- int len = 12;
- char *sender;
- sha4_context sha4;
- unsigned char padbuf[48];
- ssl_session *session = ssl->session_negotiate;
- if( !session )
- session = ssl->session;
- SSL_DEBUG_MSG( 2, ( "=> calc finished tls sha384" ) );
- memcpy( &sha4, &ssl->handshake->fin_sha4, sizeof(sha4_context) );
- /*
- * TLSv1.2:
- * hash = PRF( master, finished_label,
- * Hash( handshake ) )[0.11]
- */
- SSL_DEBUG_BUF( 4, "finished sha4 state", (unsigned char *)
- sha4.state, sizeof( sha4.state ) );
- sender = ( from == SSL_IS_CLIENT )
- ? (char *) "client finished"
- : (char *) "server finished";
- sha4_finish( &sha4, padbuf );
- ssl->handshake->tls_prf( session->master, 48, sender,
- padbuf, 48, buf, len );
- SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
- memset( &sha4, 0, sizeof( sha4_context ) );
- memset( padbuf, 0, sizeof( padbuf ) );
- SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
- }
- #endif
- void ssl_handshake_wrapup( ssl_context *ssl )
- {
- SSL_DEBUG_MSG( 3, ( "=> handshake wrapup" ) );
- /*
- * Free our handshake params
- */
- ssl_handshake_free( ssl->handshake );
- free( ssl->handshake );
- ssl->handshake = NULL;
- /*
- * Switch in our now active transform context
- */
- if( ssl->transform )
- {
- ssl_transform_free( ssl->transform );
- free( ssl->transform );
- }
- ssl->transform = ssl->transform_negotiate;
- ssl->transform_negotiate = NULL;
- if( ssl->session )
- {
- ssl_session_free( ssl->session );
- free( ssl->session );
- }
- ssl->session = ssl->session_negotiate;
- ssl->session_negotiate = NULL;
- /*
- * Add cache entry
- */
- if( ssl->f_set_cache != NULL )
- if( ssl->f_set_cache( ssl->p_set_cache, ssl->session ) != 0 )
- SSL_DEBUG_MSG( 1, ( "cache did not store session" ) );
- ssl->state++;
- SSL_DEBUG_MSG( 3, ( "<= handshake wrapup" ) );
- }
- int ssl_write_finished( ssl_context *ssl )
- {
- int ret, hash_len;
- SSL_DEBUG_MSG( 2, ( "=> write finished" ) );
- ssl->handshake->calc_finished( ssl, ssl->out_msg + 4, ssl->endpoint );
- // TODO TLS/1.2 Hash length is determined by cipher suite (Page 63)
- hash_len = ( ssl->minor_ver == SSL_MINOR_VERSION_0 ) ? 36 : 12;
- ssl->verify_data_len = hash_len;
- memcpy( ssl->own_verify_data, ssl->out_msg + 4, hash_len );
- ssl->out_msglen = 4 + hash_len;
- ssl->out_msgtype = SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = SSL_HS_FINISHED;
- /*
- * In case of session resuming, invert the client and server
- * ChangeCipherSpec messages order.
- */
- if( ssl->handshake->resume != 0 )
- {
- if( ssl->endpoint == SSL_IS_CLIENT )
- ssl->state = SSL_HANDSHAKE_WRAPUP;
- else
- ssl->state = SSL_CLIENT_CHANGE_CIPHER_SPEC;
- }
- else
- ssl->state++;
- /*
- * Switch to our negotiated transform and session parameters for outbound data.
- */
- SSL_DEBUG_MSG( 3, ( "switching to new transform spec for outbound data" ) );
- ssl->transform_out = ssl->transform_negotiate;
- ssl->session_out = ssl->session_negotiate;
- memset( ssl->out_ctr, 0, 8 );
- if( ( ret = ssl_write_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_write_record", ret );
- return( ret );
- }
- SSL_DEBUG_MSG( 2, ( "<= write finished" ) );
- return( 0 );
- }
- int ssl_parse_finished( ssl_context *ssl )
- {
- int ret;
- unsigned int hash_len;
- unsigned char buf[36];
- SSL_DEBUG_MSG( 2, ( "=> parse finished" ) );
- ssl->handshake->calc_finished( ssl, buf, ssl->endpoint ^ 1 );
- /*
- * Switch to our negotiated transform and session parameters for inbound data.
- */
- SSL_DEBUG_MSG( 3, ( "switching to new transform spec for inbound data" ) );
- ssl->transform_in = ssl->transform_negotiate;
- ssl->session_in = ssl->session_negotiate;
- memset( ssl->in_ctr, 0, 8 );
- if( ( ret = ssl_read_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_read_record", ret );
- return( ret );
- }
- if( ssl->in_msgtype != SSL_MSG_HANDSHAKE )
- {
- SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
- return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
- }
- // TODO TLS/1.2 Hash length is determined by cipher suite (Page 63)
- hash_len = ( ssl->minor_ver == SSL_MINOR_VERSION_0 ) ? 36 : 12;
- if( ssl->in_msg[0] != SSL_HS_FINISHED ||
- ssl->in_hslen != 4 + hash_len )
- {
- SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_FINISHED );
- }
- if( memcmp( ssl->in_msg + 4, buf, hash_len ) != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_FINISHED );
- }
- ssl->verify_data_len = hash_len;
- memcpy( ssl->peer_verify_data, buf, hash_len );
- if( ssl->handshake->resume != 0 )
- {
- if( ssl->endpoint == SSL_IS_CLIENT )
- ssl->state = SSL_CLIENT_CHANGE_CIPHER_SPEC;
- if( ssl->endpoint == SSL_IS_SERVER )
- ssl->state = SSL_HANDSHAKE_WRAPUP;
- }
- else
- ssl->state++;
- SSL_DEBUG_MSG( 2, ( "<= parse finished" ) );
- return( 0 );
- }
- int ssl_handshake_init( ssl_context *ssl )
- {
- if( ssl->transform_negotiate )
- ssl_transform_free( ssl->transform_negotiate );
- else
- ssl->transform_negotiate = malloc( sizeof(ssl_transform) );
- if( ssl->session_negotiate )
- ssl_session_free( ssl->session_negotiate );
- else
- ssl->session_negotiate = malloc( sizeof(ssl_session) );
- if( ssl->handshake )
- ssl_handshake_free( ssl->handshake );
- else
- ssl->handshake = malloc( sizeof(ssl_handshake_params) );
- if( ssl->handshake == NULL ||
- ssl->transform_negotiate == NULL ||
- ssl->session_negotiate == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "malloc() of ssl sub-contexts failed" ) );
- return( POLARSSL_ERR_SSL_MALLOC_FAILED );
- }
- memset( ssl->handshake, 0, sizeof(ssl_handshake_params) );
- memset( ssl->transform_negotiate, 0, sizeof(ssl_transform) );
- memset( ssl->session_negotiate, 0, sizeof(ssl_session) );
- md5_starts( &ssl->handshake->fin_md5 );
- sha1_starts( &ssl->handshake->fin_sha1 );
- sha2_starts( &ssl->handshake->fin_sha2, 0 );
- #if defined(POLARSSL_SHA4_C)
- sha4_starts( &ssl->handshake->fin_sha4, 1 );
- #endif
- ssl->handshake->update_checksum = ssl_update_checksum_start;
- ssl->handshake->sig_alg = SSL_HASH_SHA1;
-
- return( 0 );
- }
- /*
- * Initialize an SSL context
- */
- int ssl_init( ssl_context *ssl )
- {
- int ret;
- int len = SSL_BUFFER_LEN;
- memset( ssl, 0, sizeof( ssl_context ) );
- /*
- * Sane defaults
- */
- ssl->rsa_decrypt = ssl_rsa_decrypt;
- ssl->rsa_sign = ssl_rsa_sign;
- ssl->rsa_key_len = ssl_rsa_key_len;
- ssl->min_major_ver = SSL_MAJOR_VERSION_3;
- ssl->min_minor_ver = SSL_MINOR_VERSION_0;
- ssl->ciphersuites = ssl_default_ciphersuites;
- #if defined(POLARSSL_DHM_C)
- if( ( ret = mpi_read_string( &ssl->dhm_P, 16,
- POLARSSL_DHM_RFC5114_MODP_1024_P) ) != 0 ||
- ( ret = mpi_read_string( &ssl->dhm_G, 16,
- POLARSSL_DHM_RFC5114_MODP_1024_G) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "mpi_read_string", ret );
- return( ret );
- }
- #endif
- /*
- * Prepare base structures
- */
- ssl->in_ctr = (unsigned char *) malloc( len );
- ssl->in_hdr = ssl->in_ctr + 8;
- ssl->in_msg = ssl->in_ctr + 13;
- if( ssl->in_ctr == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "malloc(%d bytes) failed", len ) );
- return( POLARSSL_ERR_SSL_MALLOC_FAILED );
- }
- ssl->out_ctr = (unsigned char *) malloc( len );
- ssl->out_hdr = ssl->out_ctr + 8;
- ssl->out_msg = ssl->out_ctr + 40;
- if( ssl->out_ctr == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "malloc(%d bytes) failed", len ) );
- free( ssl-> in_ctr );
- return( POLARSSL_ERR_SSL_MALLOC_FAILED );
- }
- memset( ssl-> in_ctr, 0, SSL_BUFFER_LEN );
- memset( ssl->out_ctr, 0, SSL_BUFFER_LEN );
- ssl->hostname = NULL;
- ssl->hostname_len = 0;
- if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
- return( ret );
- return( 0 );
- }
- /*
- * Reset an initialized and used SSL context for re-use while retaining
- * all application-set variables, function pointers and data.
- */
- int ssl_session_reset( ssl_context *ssl )
- {
- int ret;
- ssl->state = SSL_HELLO_REQUEST;
- ssl->renegotiation = SSL_INITIAL_HANDSHAKE;
- ssl->secure_renegotiation = SSL_LEGACY_RENEGOTIATION;
- ssl->verify_data_len = 0;
- memset( ssl->own_verify_data, 0, 36 );
- memset( ssl->peer_verify_data, 0, 36 );
- ssl->in_offt = NULL;
- ssl->in_msgtype = 0;
- ssl->in_msglen = 0;
- ssl->in_left = 0;
- ssl->in_hslen = 0;
- ssl->nb_zero = 0;
- ssl->out_msgtype = 0;
- ssl->out_msglen = 0;
- ssl->out_left = 0;
- ssl->transform_in = NULL;
- ssl->transform_out = NULL;
- memset( ssl->out_ctr, 0, SSL_BUFFER_LEN );
- memset( ssl->in_ctr, 0, SSL_BUFFER_LEN );
- #if defined(POLARSSL_SSL_HW_RECORD_ACCEL)
- if( ssl_hw_record_reset != NULL)
- {
- SSL_DEBUG_MSG( 2, ( "going for ssl_hw_record_reset()" ) );
- if( ssl_hw_record_reset( ssl ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_hw_record_reset", ret );
- return( POLARSSL_ERR_SSL_HW_ACCEL_FAILED );
- }
- }
- #endif
- if( ssl->transform )
- {
- ssl_transform_free( ssl->transform );
- free( ssl->transform );
- ssl->transform = NULL;
- }
- if( ssl->session )
- {
- ssl_session_free( ssl->session );
- free( ssl->session );
- ssl->session = NULL;
- }
- if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
- return( ret );
- return( 0 );
- }
- /*
- * SSL set accessors
- */
- void ssl_set_endpoint( ssl_context *ssl, int endpoint )
- {
- ssl->endpoint = endpoint;
- }
- void ssl_set_authmode( ssl_context *ssl, int authmode )
- {
- ssl->authmode = authmode;
- }
- void ssl_set_verify( ssl_context *ssl,
- int (*f_vrfy)(void *, x509_cert *, int, int *),
- void *p_vrfy )
- {
- ssl->f_vrfy = f_vrfy;
- ssl->p_vrfy = p_vrfy;
- }
- void ssl_set_rng( ssl_context *ssl,
- int (*f_rng)(void *, unsigned char *, size_t),
- void *p_rng )
- {
- ssl->f_rng = f_rng;
- ssl->p_rng = p_rng;
- }
- void ssl_set_dbg( ssl_context *ssl,
- void (*f_dbg)(void *, int, const char *),
- void *p_dbg )
- {
- ssl->f_dbg = f_dbg;
- ssl->p_dbg = p_dbg;
- }
- void ssl_set_bio( ssl_context *ssl,
- int (*f_recv)(void *, unsigned char *, size_t), void *p_recv,
- int (*f_send)(void *, const unsigned char *, size_t), void *p_send )
- {
- ssl->f_recv = f_recv;
- ssl->f_send = f_send;
- ssl->p_recv = p_recv;
- ssl->p_send = p_send;
- }
- void ssl_set_session_cache( ssl_context *ssl,
- int (*f_get_cache)(void *, ssl_session *), void *p_get_cache,
- int (*f_set_cache)(void *, const ssl_session *), void *p_set_cache )
- {
- ssl->f_get_cache = f_get_cache;
- ssl->p_get_cache = p_get_cache;
- ssl->f_set_cache = f_set_cache;
- ssl->p_set_cache = p_set_cache;
- }
- void ssl_set_session( ssl_context *ssl, const ssl_session *session )
- {
- memcpy( ssl->session_negotiate, session, sizeof(ssl_session) );
- ssl->handshake->resume = 1;
- }
- void ssl_set_ciphersuites( ssl_context *ssl, const int *ciphersuites )
- {
- ssl->ciphersuites = ciphersuites;
- }
- void ssl_set_ca_chain( ssl_context *ssl, x509_cert *ca_chain,
- x509_crl *ca_crl, const char *peer_cn )
- {
- ssl->ca_chain = ca_chain;
- ssl->ca_crl = ca_crl;
- ssl->peer_cn = peer_cn;
- }
- void ssl_set_own_cert( ssl_context *ssl, x509_cert *own_cert,
- rsa_context *rsa_key )
- {
- ssl->own_cert = own_cert;
- ssl->rsa_key = rsa_key;
- }
- void ssl_set_own_cert_alt( ssl_context *ssl, x509_cert *own_cert,
- void *rsa_key,
- rsa_decrypt_func rsa_decrypt,
- rsa_sign_func rsa_sign,
- rsa_key_len_func rsa_key_len )
- {
- ssl->own_cert = own_cert;
- ssl->rsa_key = rsa_key;
- ssl->rsa_decrypt = rsa_decrypt;
- ssl->rsa_sign = rsa_sign;
- ssl->rsa_key_len = rsa_key_len;
- }
- #if defined(POLARSSL_DHM_C)
- int ssl_set_dh_param( ssl_context *ssl, const char *dhm_P, const char *dhm_G )
- {
- int ret;
- if( ( ret = mpi_read_string( &ssl->dhm_P, 16, dhm_P ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "mpi_read_string", ret );
- return( ret );
- }
- if( ( ret = mpi_read_string( &ssl->dhm_G, 16, dhm_G ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "mpi_read_string", ret );
- return( ret );
- }
- return( 0 );
- }
- int ssl_set_dh_param_ctx( ssl_context *ssl, dhm_context *dhm_ctx )
- {
- int ret;
- if( ( ret = mpi_copy(&ssl->dhm_P, &dhm_ctx->P) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "mpi_copy", ret );
- return( ret );
- }
- if( ( ret = mpi_copy(&ssl->dhm_G, &dhm_ctx->G) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "mpi_copy", ret );
- return( ret );
- }
- return( 0 );
- }
- #endif /* POLARSSL_DHM_C */
- int ssl_set_hostname( ssl_context *ssl, const char *hostname )
- {
- if( hostname == NULL )
- return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
- ssl->hostname_len = strlen( hostname );
- ssl->hostname = (unsigned char *) malloc( ssl->hostname_len + 1 );
- if( ssl->hostname == NULL )
- return( POLARSSL_ERR_SSL_MALLOC_FAILED );
- memcpy( ssl->hostname, (unsigned char *) hostname,
- ssl->hostname_len );
-
- ssl->hostname[ssl->hostname_len] = '\0';
- return( 0 );
- }
- void ssl_set_sni( ssl_context *ssl,
- int (*f_sni)(void *, ssl_context *,
- const unsigned char *, size_t),
- void *p_sni )
- {
- ssl->f_sni = f_sni;
- ssl->p_sni = p_sni;
- }
- void ssl_set_max_version( ssl_context *ssl, int major, int minor )
- {
- ssl->max_major_ver = major;
- ssl->max_minor_ver = minor;
- }
- void ssl_set_min_version( ssl_context *ssl, int major, int minor )
- {
- ssl->min_major_ver = major;
- ssl->min_minor_ver = minor;
- }
- void ssl_set_renegotiation( ssl_context *ssl, int renegotiation )
- {
- ssl->disable_renegotiation = renegotiation;
- }
- void ssl_legacy_renegotiation( ssl_context *ssl, int allow_legacy )
- {
- ssl->allow_legacy_renegotiation = allow_legacy;
- }
- /*
- * SSL get accessors
- */
- size_t ssl_get_bytes_avail( const ssl_context *ssl )
- {
- return( ssl->in_offt == NULL ? 0 : ssl->in_msglen );
- }
- int ssl_get_verify_result( const ssl_context *ssl )
- {
- return( ssl->verify_result );
- }
- const char *ssl_get_ciphersuite_name( const int ciphersuite_id )
- {
- switch( ciphersuite_id )
- {
- #if defined(POLARSSL_ARC4_C)
- case TLS_RSA_WITH_RC4_128_MD5:
- return( "TLS-RSA-WITH-RC4-128-MD5" );
- case TLS_RSA_WITH_RC4_128_SHA:
- return( "TLS-RSA-WITH-RC4-128-SHA" );
- #endif
- #if defined(POLARSSL_DES_C)
- case TLS_RSA_WITH_3DES_EDE_CBC_SHA:
- return( "TLS-RSA-WITH-3DES-EDE-CBC-SHA" );
- case TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA:
- return( "TLS-DHE-RSA-WITH-3DES-EDE-CBC-SHA" );
- #endif
- #if defined(POLARSSL_AES_C)
- case TLS_RSA_WITH_AES_128_CBC_SHA:
- return( "TLS-RSA-WITH-AES-128-CBC-SHA" );
- case TLS_DHE_RSA_WITH_AES_128_CBC_SHA:
- return( "TLS-DHE-RSA-WITH-AES-128-CBC-SHA" );
- case TLS_RSA_WITH_AES_256_CBC_SHA:
- return( "TLS-RSA-WITH-AES-256-CBC-SHA" );
- case TLS_DHE_RSA_WITH_AES_256_CBC_SHA:
- return( "TLS-DHE-RSA-WITH-AES-256-CBC-SHA" );
- #if defined(POLARSSL_SHA2_C)
- case TLS_RSA_WITH_AES_128_CBC_SHA256:
- return( "TLS-RSA-WITH-AES-128-CBC-SHA256" );
- case TLS_RSA_WITH_AES_256_CBC_SHA256:
- return( "TLS-RSA-WITH-AES-256-CBC-SHA256" );
- case TLS_DHE_RSA_WITH_AES_128_CBC_SHA256:
- return( "TLS-DHE-RSA-WITH-AES-128-CBC-SHA256" );
- case TLS_DHE_RSA_WITH_AES_256_CBC_SHA256:
- return( "TLS-DHE-RSA-WITH-AES-256-CBC-SHA256" );
- #endif
- #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
- case TLS_RSA_WITH_AES_128_GCM_SHA256:
- return( "TLS-RSA-WITH-AES-128-GCM-SHA256" );
- case TLS_RSA_WITH_AES_256_GCM_SHA384:
- return( "TLS-RSA-WITH-AES-256-GCM-SHA384" );
- #endif
- #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
- case TLS_DHE_RSA_WITH_AES_128_GCM_SHA256:
- return( "TLS-DHE-RSA-WITH-AES-128-GCM-SHA256" );
- case TLS_DHE_RSA_WITH_AES_256_GCM_SHA384:
- return( "TLS-DHE-RSA-WITH-AES-256-GCM-SHA384" );
- #endif
- #endif /* POLARSSL_AES_C */
- #if defined(POLARSSL_CAMELLIA_C)
- case TLS_RSA_WITH_CAMELLIA_128_CBC_SHA:
- return( "TLS-RSA-WITH-CAMELLIA-128-CBC-SHA" );
- case TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA:
- return( "TLS-DHE-RSA-WITH-CAMELLIA-128-CBC-SHA" );
- case TLS_RSA_WITH_CAMELLIA_256_CBC_SHA:
- return( "TLS-RSA-WITH-CAMELLIA-256-CBC-SHA" );
- case TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA:
- return( "TLS-DHE-RSA-WITH-CAMELLIA-256-CBC-SHA" );
- #if defined(POLARSSL_SHA2_C)
- case TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256:
- return( "TLS-RSA-WITH-CAMELLIA-128-CBC-SHA256" );
- case TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256:
- return( "TLS-DHE-RSA-WITH-CAMELLIA-128-CBC-SHA256" );
- case TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256:
- return( "TLS-RSA-WITH-CAMELLIA-256-CBC-SHA256" );
- case TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256:
- return( "TLS-DHE-RSA-WITH-CAMELLIA-256-CBC-SHA256" );
- #endif
- #endif
- #if defined(POLARSSL_ENABLE_WEAK_CIPHERSUITES)
- #if defined(POLARSSL_CIPHER_NULL_CIPHER)
- case TLS_RSA_WITH_NULL_MD5:
- return( "TLS-RSA-WITH-NULL-MD5" );
- case TLS_RSA_WITH_NULL_SHA:
- return( "TLS-RSA-WITH-NULL-SHA" );
- case TLS_RSA_WITH_NULL_SHA256:
- return( "TLS-RSA-WITH-NULL-SHA256" );
- #endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
- #if defined(POLARSSL_DES_C)
- case TLS_RSA_WITH_DES_CBC_SHA:
- return( "TLS-RSA-WITH-DES-CBC-SHA" );
- case TLS_DHE_RSA_WITH_DES_CBC_SHA:
- return( "TLS-DHE-RSA-WITH-DES-CBC-SHA" );
- #endif
- #endif /* defined(POLARSSL_ENABLE_WEAK_CIPHERSUITES) */
- default:
- break;
- }
- return( "unknown" );
- }
- int ssl_get_ciphersuite_id( const char *ciphersuite_name )
- {
- #if defined(POLARSSL_ARC4_C)
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-RC4-128-MD5"))
- return( TLS_RSA_WITH_RC4_128_MD5 );
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-RC4-128-SHA"))
- return( TLS_RSA_WITH_RC4_128_SHA );
- #endif
- #if defined(POLARSSL_DES_C)
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-3DES-EDE-CBC-SHA"))
- return( TLS_RSA_WITH_3DES_EDE_CBC_SHA );
- if (0 == strcasecmp(ciphersuite_name, "TLS-DHE-RSA-WITH-3DES-EDE-CBC-SHA"))
- return( TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA );
- #endif
- #if defined(POLARSSL_AES_C)
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-AES-128-CBC-SHA"))
- return( TLS_RSA_WITH_AES_128_CBC_SHA );
- if (0 == strcasecmp(ciphersuite_name, "TLS-DHE-RSA-WITH-AES-128-CBC-SHA"))
- return( TLS_DHE_RSA_WITH_AES_128_CBC_SHA );
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-AES-256-CBC-SHA"))
- return( TLS_RSA_WITH_AES_256_CBC_SHA );
- if (0 == strcasecmp(ciphersuite_name, "TLS-DHE-RSA-WITH-AES-256-CBC-SHA"))
- return( TLS_DHE_RSA_WITH_AES_256_CBC_SHA );
- #if defined(POLARSSL_SHA2_C)
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-AES-128-CBC-SHA256"))
- return( TLS_RSA_WITH_AES_128_CBC_SHA256 );
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-AES-256-CBC-SHA256"))
- return( TLS_RSA_WITH_AES_256_CBC_SHA256 );
- if (0 == strcasecmp(ciphersuite_name, "TLS-DHE-RSA-WITH-AES-128-CBC-SHA256"))
- return( TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 );
- if (0 == strcasecmp(ciphersuite_name, "TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"))
- return( TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 );
- #endif
- #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-AES-128-GCM-SHA256"))
- return( TLS_RSA_WITH_AES_128_GCM_SHA256 );
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-AES-256-GCM-SHA384"))
- return( TLS_RSA_WITH_AES_256_GCM_SHA384 );
- #endif
- #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
- if (0 == strcasecmp(ciphersuite_name, "TLS-DHE-RSA-WITH-AES-128-GCM-SHA256"))
- return( TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 );
- if (0 == strcasecmp(ciphersuite_name, "TLS-DHE-RSA-WITH-AES-256-GCM-SHA384"))
- return( TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 );
- #endif
- #endif
- #if defined(POLARSSL_CAMELLIA_C)
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-CAMELLIA-128-CBC-SHA"))
- return( TLS_RSA_WITH_CAMELLIA_128_CBC_SHA );
- if (0 == strcasecmp(ciphersuite_name, "TLS-DHE-RSA-WITH-CAMELLIA-128-CBC-SHA"))
- return( TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA );
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-CAMELLIA-256-CBC-SHA"))
- return( TLS_RSA_WITH_CAMELLIA_256_CBC_SHA );
- if (0 == strcasecmp(ciphersuite_name, "TLS-DHE-RSA-WITH-CAMELLIA-256-CBC-SHA"))
- return( TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA );
- #if defined(POLARSSL_SHA2_C)
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-CAMELLIA-128-CBC-SHA256"))
- return( TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 );
- if (0 == strcasecmp(ciphersuite_name, "TLS-DHE-RSA-WITH-CAMELLIA-128-CBC-SHA256"))
- return( TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 );
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-CAMELLIA-256-CBC-SHA256"))
- return( TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 );
- if (0 == strcasecmp(ciphersuite_name, "TLS-DHE-RSA-WITH-CAMELLIA-256-CBC-SHA256"))
- return( TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 );
- #endif
- #endif
- #if defined(POLARSSL_ENABLE_WEAK_CIPHERSUITES)
- #if defined(POLARSSL_CIPHER_NULL_CIPHER)
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-NULL-MD5"))
- return( TLS_RSA_WITH_NULL_MD5 );
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-NULL-SHA"))
- return( TLS_RSA_WITH_NULL_SHA );
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-NULL-SHA256"))
- return( TLS_RSA_WITH_NULL_SHA256 );
- #endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
- #if defined(POLARSSL_DES_C)
- if (0 == strcasecmp(ciphersuite_name, "TLS-RSA-WITH-DES-CBC-SHA"))
- return( TLS_RSA_WITH_DES_CBC_SHA );
- if (0 == strcasecmp(ciphersuite_name, "TLS-DHE-RSA-WITH-DES-CBC-SHA"))
- return( TLS_DHE_RSA_WITH_DES_CBC_SHA );
- #endif
- #endif /* defined(POLARSSL_ENABLE_WEAK_CIPHERSUITES) */
- return( 0 );
- }
- const char *ssl_get_ciphersuite( const ssl_context *ssl )
- {
- return ssl_get_ciphersuite_name( ssl->session->ciphersuite );
- }
- const char *ssl_get_version( const ssl_context *ssl )
- {
- switch( ssl->minor_ver )
- {
- case SSL_MINOR_VERSION_0:
- return( "SSLv3.0" );
- case SSL_MINOR_VERSION_1:
- return( "TLSv1.0" );
- case SSL_MINOR_VERSION_2:
- return( "TLSv1.1" );
- case SSL_MINOR_VERSION_3:
- return( "TLSv1.2" );
- default:
- break;
- }
- return( "unknown" );
- }
- const x509_cert *ssl_get_peer_cert( const ssl_context *ssl )
- {
- if( ssl == NULL || ssl->session == NULL )
- return NULL;
- return ssl->session->peer_cert;
- }
- const int ssl_default_ciphersuites[] =
- {
- #if defined(POLARSSL_DHM_C)
- #if defined(POLARSSL_AES_C)
- #if defined(POLARSSL_SHA2_C)
- TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,
- #endif /* POLARSSL_SHA2_C */
- #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
- TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,
- #endif
- TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
- #if defined(POLARSSL_SHA2_C)
- TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
- #endif
- #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
- TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
- #endif
- TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
- #endif
- #if defined(POLARSSL_CAMELLIA_C)
- #if defined(POLARSSL_SHA2_C)
- TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256,
- #endif /* POLARSSL_SHA2_C */
- TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA,
- #if defined(POLARSSL_SHA2_C)
- TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256,
- #endif /* POLARSSL_SHA2_C */
- TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA,
- #endif
- #if defined(POLARSSL_DES_C)
- TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA,
- #endif
- #endif
- #if defined(POLARSSL_AES_C)
- #if defined(POLARSSL_SHA2_C)
- TLS_RSA_WITH_AES_256_CBC_SHA256,
- #endif /* POLARSSL_SHA2_C */
- #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
- TLS_RSA_WITH_AES_256_GCM_SHA384,
- #endif /* POLARSSL_SHA2_C */
- TLS_RSA_WITH_AES_256_CBC_SHA,
- #endif
- #if defined(POLARSSL_CAMELLIA_C)
- #if defined(POLARSSL_SHA2_C)
- TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256,
- #endif /* POLARSSL_SHA2_C */
- TLS_RSA_WITH_CAMELLIA_256_CBC_SHA,
- #endif
- #if defined(POLARSSL_AES_C)
- #if defined(POLARSSL_SHA2_C)
- TLS_RSA_WITH_AES_128_CBC_SHA256,
- #endif /* POLARSSL_SHA2_C */
- #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
- TLS_RSA_WITH_AES_128_GCM_SHA256,
- #endif /* POLARSSL_SHA2_C */
- TLS_RSA_WITH_AES_128_CBC_SHA,
- #endif
- #if defined(POLARSSL_CAMELLIA_C)
- #if defined(POLARSSL_SHA2_C)
- TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256,
- #endif /* POLARSSL_SHA2_C */
- TLS_RSA_WITH_CAMELLIA_128_CBC_SHA,
- #endif
- #if defined(POLARSSL_DES_C)
- TLS_RSA_WITH_3DES_EDE_CBC_SHA,
- #endif
- #if defined(POLARSSL_ARC4_C)
- TLS_RSA_WITH_RC4_128_SHA,
- TLS_RSA_WITH_RC4_128_MD5,
- #endif
- 0
- };
- /*
- * Perform a single step of the SSL handshake
- */
- int ssl_handshake_step( ssl_context *ssl )
- {
- int ret = POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE;
- #if defined(POLARSSL_SSL_CLI_C)
- if( ssl->endpoint == SSL_IS_CLIENT )
- ret = ssl_handshake_client_step( ssl );
- #endif
- #if defined(POLARSSL_SSL_SRV_C)
- if( ssl->endpoint == SSL_IS_SERVER )
- ret = ssl_handshake_server_step( ssl );
- #endif
- return( ret );
- }
- /*
- * Perform the SSL handshake
- */
- int ssl_handshake( ssl_context *ssl )
- {
- int ret = 0;
- SSL_DEBUG_MSG( 2, ( "=> handshake" ) );
- while( ssl->state != SSL_HANDSHAKE_OVER )
- {
- ret = ssl_handshake_step( ssl );
- if( ret != 0 )
- break;
- }
- SSL_DEBUG_MSG( 2, ( "<= handshake" ) );
- return( ret );
- }
- /*
- * Renegotiate current connection
- */
- int ssl_renegotiate( ssl_context *ssl )
- {
- int ret;
- SSL_DEBUG_MSG( 2, ( "=> renegotiate" ) );
- if( ssl->state != SSL_HANDSHAKE_OVER )
- return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
- ssl->state = SSL_HELLO_REQUEST;
- ssl->renegotiation = SSL_RENEGOTIATION;
- if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
- return( ret );
- if( ( ret = ssl_handshake( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_handshake", ret );
- return( ret );
- }
- SSL_DEBUG_MSG( 2, ( "<= renegotiate" ) );
- return( 0 );
- }
- /*
- * Receive application data decrypted from the SSL layer
- */
- int ssl_read( ssl_context *ssl, unsigned char *buf, size_t len )
- {
- int ret;
- size_t n;
- SSL_DEBUG_MSG( 2, ( "=> read" ) );
- if( ssl->state != SSL_HANDSHAKE_OVER )
- {
- if( ( ret = ssl_handshake( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_handshake", ret );
- return( ret );
- }
- }
- if( ssl->in_offt == NULL )
- {
- if( ( ret = ssl_read_record( ssl ) ) != 0 )
- {
- if( ret == POLARSSL_ERR_SSL_CONN_EOF )
- return( 0 );
- SSL_DEBUG_RET( 1, "ssl_read_record", ret );
- return( ret );
- }
- if( ssl->in_msglen == 0 &&
- ssl->in_msgtype == SSL_MSG_APPLICATION_DATA )
- {
- /*
- * OpenSSL sends empty messages to randomize the IV
- */
- if( ( ret = ssl_read_record( ssl ) ) != 0 )
- {
- if( ret == POLARSSL_ERR_SSL_CONN_EOF )
- return( 0 );
- SSL_DEBUG_RET( 1, "ssl_read_record", ret );
- return( ret );
- }
- }
- if( ssl->in_msgtype == SSL_MSG_HANDSHAKE )
- {
- SSL_DEBUG_MSG( 1, ( "received handshake message" ) );
- if( ssl->endpoint == SSL_IS_CLIENT &&
- ( ssl->in_msg[0] != SSL_HS_HELLO_REQUEST ||
- ssl->in_hslen != 4 ) )
- {
- SSL_DEBUG_MSG( 1, ( "handshake received (not HelloRequest)" ) );
- return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
- }
- if( ssl->disable_renegotiation == SSL_RENEGOTIATION_DISABLED ||
- ( ssl->secure_renegotiation == SSL_LEGACY_RENEGOTIATION &&
- ssl->allow_legacy_renegotiation == SSL_LEGACY_NO_RENEGOTIATION ) )
- {
- SSL_DEBUG_MSG( 3, ( "ignoring renegotiation, sending alert" ) );
- if( ssl->minor_ver == SSL_MINOR_VERSION_0 )
- {
- /*
- * SSLv3 does not have a "no_renegotiation" alert
- */
- if( ( ret = ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
- return( ret );
- }
- else
- {
- if( ( ret = ssl_send_alert_message( ssl,
- SSL_ALERT_LEVEL_WARNING,
- SSL_ALERT_MSG_NO_RENEGOTIATION ) ) != 0 )
- {
- return( ret );
- }
- }
- }
- else
- {
- if( ( ret = ssl_renegotiate( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_renegotiate", ret );
- return( ret );
- }
- return( POLARSSL_ERR_NET_WANT_READ );
- }
- }
- else if( ssl->in_msgtype != SSL_MSG_APPLICATION_DATA )
- {
- SSL_DEBUG_MSG( 1, ( "bad application data message" ) );
- return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
- }
- ssl->in_offt = ssl->in_msg;
- }
- n = ( len < ssl->in_msglen )
- ? len : ssl->in_msglen;
- memcpy( buf, ssl->in_offt, n );
- ssl->in_msglen -= n;
- if( ssl->in_msglen == 0 )
- /* all bytes consumed */
- ssl->in_offt = NULL;
- else
- /* more data available */
- ssl->in_offt += n;
- SSL_DEBUG_MSG( 2, ( "<= read" ) );
- return( (int) n );
- }
- /*
- * Send application data to be encrypted by the SSL layer
- */
- int ssl_write( ssl_context *ssl, const unsigned char *buf, size_t len )
- {
- int ret;
- size_t n;
- SSL_DEBUG_MSG( 2, ( "=> write" ) );
- if( ssl->state != SSL_HANDSHAKE_OVER )
- {
- if( ( ret = ssl_handshake( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_handshake", ret );
- return( ret );
- }
- }
- n = ( len < SSL_MAX_CONTENT_LEN )
- ? len : SSL_MAX_CONTENT_LEN;
- if( ssl->out_left != 0 )
- {
- if( ( ret = ssl_flush_output( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_flush_output", ret );
- return( ret );
- }
- }
- else
- {
- ssl->out_msglen = n;
- ssl->out_msgtype = SSL_MSG_APPLICATION_DATA;
- memcpy( ssl->out_msg, buf, n );
- if( ( ret = ssl_write_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_write_record", ret );
- return( ret );
- }
- }
- SSL_DEBUG_MSG( 2, ( "<= write" ) );
- return( (int) n );
- }
- /*
- * Notify the peer that the connection is being closed
- */
- int ssl_close_notify( ssl_context *ssl )
- {
- int ret;
- SSL_DEBUG_MSG( 2, ( "=> write close notify" ) );
- if( ( ret = ssl_flush_output( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_flush_output", ret );
- return( ret );
- }
- if( ssl->state == SSL_HANDSHAKE_OVER )
- {
- if( ( ret = ssl_send_alert_message( ssl,
- SSL_ALERT_LEVEL_WARNING,
- SSL_ALERT_MSG_CLOSE_NOTIFY ) ) != 0 )
- {
- return( ret );
- }
- }
- SSL_DEBUG_MSG( 2, ( "<= write close notify" ) );
- return( ret );
- }
- void ssl_transform_free( ssl_transform *transform )
- {
- #if defined(POLARSSL_ZLIB_SUPPORT)
- deflateEnd( &transform->ctx_deflate );
- inflateEnd( &transform->ctx_inflate );
- #endif
- memset( transform, 0, sizeof( ssl_transform ) );
- }
- void ssl_handshake_free( ssl_handshake_params *handshake )
- {
- #if defined(POLARSSL_DHM_C)
- dhm_free( &handshake->dhm_ctx );
- #endif
- memset( handshake, 0, sizeof( ssl_handshake_params ) );
- }
- void ssl_session_free( ssl_session *session )
- {
- if( session->peer_cert != NULL )
- {
- x509_free( session->peer_cert );
- free( session->peer_cert );
- }
- memset( session, 0, sizeof( ssl_session ) );
- }
- /*
- * Free an SSL context
- */
- void ssl_free( ssl_context *ssl )
- {
- SSL_DEBUG_MSG( 2, ( "=> free" ) );
- if( ssl->out_ctr != NULL )
- {
- memset( ssl->out_ctr, 0, SSL_BUFFER_LEN );
- free( ssl->out_ctr );
- }
- if( ssl->in_ctr != NULL )
- {
- memset( ssl->in_ctr, 0, SSL_BUFFER_LEN );
- free( ssl->in_ctr );
- }
- #if defined(POLARSSL_DHM_C)
- mpi_free( &ssl->dhm_P );
- mpi_free( &ssl->dhm_G );
- #endif
- if( ssl->transform )
- {
- ssl_transform_free( ssl->transform );
- free( ssl->transform );
- }
- if( ssl->handshake )
- {
- ssl_handshake_free( ssl->handshake );
- ssl_transform_free( ssl->transform_negotiate );
- ssl_session_free( ssl->session_negotiate );
- free( ssl->handshake );
- free( ssl->transform_negotiate );
- free( ssl->session_negotiate );
- }
- if( ssl->session )
- {
- ssl_session_free( ssl->session );
- free( ssl->session );
- }
- if ( ssl->hostname != NULL)
- {
- memset( ssl->hostname, 0, ssl->hostname_len );
- free( ssl->hostname );
- ssl->hostname_len = 0;
- }
- #if defined(POLARSSL_SSL_HW_RECORD_ACCEL)
- if( ssl_hw_record_finish != NULL )
- {
- SSL_DEBUG_MSG( 2, ( "going for ssl_hw_record_finish()" ) );
- ssl_hw_record_finish( ssl );
- }
- #endif
- SSL_DEBUG_MSG( 2, ( "<= free" ) );
- /* Actually clear after last debug message */
- memset( ssl, 0, sizeof( ssl_context ) );
- }
- #endif