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- Added GCM ciphersuites to TLS implementation

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This commit is contained in:
Paul Bakker 2012-04-18 14:23:57 +00:00
parent 0b22e3e989
commit ca4ab49158
8 changed files with 433 additions and 52 deletions
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1
ChangeLog
View File

@ -14,6 +14,7 @@ Features
* Added cert_req example application
* Added base Galois Counter Mode (GCM) for AES
* Added TLS 1.2 support
* Added GCM suites to TLS 1.2 (RFC 5288)
Changes
* Removed redundant POLARSSL_DEBUG_MSG define

10
include/polarssl/gcm.h
View File

@ -35,6 +35,7 @@
#define GCM_DECRYPT 0
#define POLARSSL_ERR_GCM_AUTH_FAILED -0x0012 /**< Authenticated decryption failed. */
#define POLARSSL_ERR_GCM_BAD_INPUT -0x0014 /**< Bad input parameters to function. */
/**
* \brief GCM context structure
@ -64,6 +65,11 @@ int gcm_init( gcm_context *ctx, const unsigned char *key, unsigned int keysize )
/**
* \brief GCM buffer encryption/decryption using AES
*
* \note On encryption, the output buffer can be the same as the input buffer.
* On decryption, the output buffer cannot be the same as input buffer.
* If buffers overlap, the output buffer must trail at least 8 bytes
* behind the input buffer.
*
* \param ctx GCM context
* \param mode GCM_ENCRYPT or GCM_DECRYPT
* \param length length of the input data
@ -93,6 +99,10 @@ int gcm_crypt_and_tag( gcm_context *ctx,
/**
* \brief GCM buffer authenticated decryption using AES
*
* \note On decryption, the output buffer cannot be the same as input buffer.
* If buffers overlap, the output buffer must trail at least 8 bytes
* behind the input buffer.
*
* \param ctx GCM context
* \param length length of the input data
* \param iv initialization vector

14
include/polarssl/ssl.h
View File

@ -35,6 +35,7 @@
#include "md5.h"
#include "sha1.h"
#include "sha2.h"
#include "sha4.h"
#include "x509.h"
#include "config.h"
@ -142,6 +143,11 @@
#define SSL_RSA_CAMELLIA_256_SHA256 0xC0 /**< TLS 1.2 */
#define SSL_EDH_RSA_CAMELLIA_256_SHA256 0xC4 /**< TLS 1.2 */
#define SSL_RSA_AES_128_GCM_SHA256 0x9C
#define SSL_RSA_AES_256_GCM_SHA384 0x9D
#define SSL_EDH_RSA_AES_128_GCM_SHA256 0x9E
#define SSL_EDH_RSA_AES_256_GCM_SHA384 0x9F
/*
* Supported Signature and Hash algorithms (For TLS 1.2)
*/
@ -172,7 +178,7 @@
#define SSL_ALERT_MSG_DECRYPTION_FAILED 21 /* 0x15 */
#define SSL_ALERT_MSG_RECORD_OVERFLOW 22 /* 0x16 */
#define SSL_ALERT_MSG_DECOMPRESSION_FAILURE 30 /* 0x1E */
#define SSL_ALERT_MSG_HANDSHAKE_FAILURE 41 /* 0x29 */
#define SSL_ALERT_MSG_HANDSHAKE_FAILURE 40 /* 0x28 */
#define SSL_ALERT_MSG_NO_CERT 41 /* 0x29 */
#define SSL_ALERT_MSG_BAD_CERT 42 /* 0x2A */
#define SSL_ALERT_MSG_UNSUPPORTED_CERT 43 /* 0x2B */
@ -339,6 +345,7 @@ struct _ssl_context
md5_context fin_md5; /*!< Finished MD5 checksum */
sha1_context fin_sha1; /*!< Finished SHA-1 checksum */
sha2_context fin_sha2; /*!< Finished SHA-256 checksum */
sha4_context fin_sha4; /*!< Finished SHA-384 checksum */
void (*calc_finished)(ssl_context *, unsigned char *, int);
int (*tls_prf)(unsigned char *, size_t, char *,
@ -351,6 +358,7 @@ struct _ssl_context
unsigned int keylen; /*!< symmetric key length */
size_t minlen; /*!< min. ciphertext length */
size_t ivlen; /*!< IV length */
size_t fixed_ivlen; /*!< Fixed part of IV (AEAD) */
size_t maclen; /*!< MAC length */
unsigned char randbytes[64]; /*!< random bytes */
@ -362,8 +370,8 @@ struct _ssl_context
unsigned char mac_enc[32]; /*!< MAC (encryption) */
unsigned char mac_dec[32]; /*!< MAC (decryption) */
unsigned long ctx_enc[128]; /*!< encryption context */
unsigned long ctx_dec[128]; /*!< decryption context */
unsigned long ctx_enc[134]; /*!< encryption context */
unsigned long ctx_dec[134]; /*!< decryption context */
/*
* TLS extensions

37
library/ssl_cli.c
View File

@ -453,7 +453,9 @@ static int ssl_parse_server_key_exchange( ssl_context *ssl )
ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_128_SHA &&
ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_256_SHA &&
ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_128_SHA256 &&
ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_256_SHA256 )
ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_256_SHA256 &&
ssl->session->ciphersuite != SSL_EDH_RSA_AES_128_GCM_SHA256 &&
ssl->session->ciphersuite != SSL_EDH_RSA_AES_256_GCM_SHA384 )
{
SSL_DEBUG_MSG( 2, ( "<= skip parse server key exchange" ) );
ssl->state++;
@ -786,7 +788,9 @@ static int ssl_write_client_key_exchange( ssl_context *ssl )
ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_128_SHA ||
ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_256_SHA ||
ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_128_SHA256 ||
ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_256_SHA256 )
ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_256_SHA256 ||
ssl->session->ciphersuite == SSL_EDH_RSA_AES_128_GCM_SHA256 ||
ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_GCM_SHA384 )
{
#if !defined(POLARSSL_DHM_C)
SSL_DEBUG_MSG( 1, ( "support for dhm in not available" ) );
@ -888,7 +892,7 @@ static int ssl_write_certificate_verify( ssl_context *ssl )
{
int ret = 0;
size_t n = 0, offset = 0;
unsigned char hash[36];
unsigned char hash[48];
int hash_id = SIG_RSA_RAW;
unsigned int hashlen = 36;
@ -902,10 +906,23 @@ static int ssl_write_certificate_verify( ssl_context *ssl )
}
if( ssl->minor_ver == SSL_MINOR_VERSION_3 )
{
// TODO TLS1.2 Should be based on allowed signature algorithm received in
// Certificate Request according to RFC 5246. But OpenSSL only allows
// SHA256 and SHA384. Find out why OpenSSL does this.
//
if( ssl->session->ciphersuite == SSL_RSA_AES_256_GCM_SHA384 ||
ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_GCM_SHA384 )
{
hash_id = SIG_RSA_SHA384;
hashlen = 48;
}
else
{
hash_id = SIG_RSA_SHA256;
hashlen = 32;
}
}
if( ssl->rsa_key == NULL )
{
@ -934,9 +951,21 @@ static int ssl_write_certificate_verify( ssl_context *ssl )
if( ssl->minor_ver == SSL_MINOR_VERSION_3 )
{
// TODO TLS1.2 Base on signature algorithm received in Certificate Request
// TODO TLS1.2 Should be based on allowed signature algorithm received in
// Certificate Request according to RFC 5246. But OpenSSL only allows
// SHA256 and SHA384. Find out why OpenSSL does this.
//
if( ssl->session->ciphersuite == SSL_RSA_AES_256_GCM_SHA384 ||
ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_GCM_SHA384 )
{
ssl->out_msg[4] = SSL_HASH_SHA384;
ssl->out_msg[5] = SSL_SIG_RSA;
}
else
{
ssl->out_msg[4] = SSL_HASH_SHA256;
ssl->out_msg[5] = SSL_SIG_RSA;
}
offset = 2;
}

12
library/ssl_srv.c
View File

@ -109,6 +109,7 @@ static int ssl_parse_client_hello( ssl_context *ssl )
md5_update( &ssl->fin_md5 , buf + 2, n );
sha1_update( &ssl->fin_sha1, buf + 2, n );
sha2_update( &ssl->fin_sha2, buf + 2, n );
sha4_update( &ssl->fin_sha4, buf + 2, n );
buf = ssl->in_msg;
n = ssl->in_left - 5;
@ -230,6 +231,7 @@ static int ssl_parse_client_hello( ssl_context *ssl )
md5_update( &ssl->fin_md5 , buf, n );
sha1_update( &ssl->fin_sha1, buf, n );
sha2_update( &ssl->fin_sha2, buf, n );
sha4_update( &ssl->fin_sha4, buf, n );
/*
* SSL layer:
@ -539,7 +541,7 @@ static int ssl_write_server_key_exchange( ssl_context *ssl )
#if defined(POLARSSL_DHM_C)
int ret;
size_t n, rsa_key_len = 0;
unsigned char hash[36];
unsigned char hash[48];
md5_context md5;
sha1_context sha1;
int hash_id;
@ -557,7 +559,9 @@ static int ssl_write_server_key_exchange( ssl_context *ssl )
ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_128_SHA &&
ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_256_SHA &&
ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_128_SHA256 &&
ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_256_SHA256 )
ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_256_SHA256 &&
ssl->session->ciphersuite != SSL_EDH_RSA_AES_128_GCM_SHA256 &&
ssl->session->ciphersuite != SSL_EDH_RSA_AES_256_GCM_SHA384 )
{
SSL_DEBUG_MSG( 2, ( "<= skip write server key exchange" ) );
ssl->state++;
@ -770,7 +774,9 @@ static int ssl_parse_client_key_exchange( ssl_context *ssl )
ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_128_SHA ||
ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_256_SHA ||
ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_128_SHA256 ||
ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_256_SHA256 )
ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_256_SHA256 ||
ssl->session->ciphersuite == SSL_EDH_RSA_AES_128_GCM_SHA256 ||
ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_GCM_SHA384 )
{
#if !defined(POLARSSL_DHM_C)
SSL_DEBUG_MSG( 1, ( "support for dhm is not available" ) );

381
library/ssl_tls.c
View File

@ -43,6 +43,10 @@
#include "polarssl/ssl.h"
#include "polarssl/sha2.h"
#if defined(POLARSSL_GCM_C)
#include "polarssl/gcm.h"
#endif
#include <stdlib.h>
#include <time.h>
@ -152,9 +156,49 @@ static int tls_prf_sha256( unsigned char *secret, size_t slen, char *label,
return( 0 );
}
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_tls1_2(ssl_context *,unsigned char *,int);
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 );
}
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);
static void ssl_calc_finished_tls_sha384(ssl_context *,unsigned char *,int);
int ssl_derive_keys( ssl_context *ssl )
{
@ -167,26 +211,34 @@ int ssl_derive_keys( ssl_context *ssl )
unsigned char keyblk[256];
unsigned char *key1;
unsigned char *key2;
unsigned int iv_copy_len;
SSL_DEBUG_MSG( 2, ( "=> derive keys" ) );
/*
* Set appropriate PRF function.
*/
if( ssl->minor_ver < SSL_MINOR_VERSION_3 )
ssl->tls_prf = tls1_prf;
else
ssl->tls_prf = tls_prf_sha256;
/*
* Set appropriate SSL / TLS / TLS1.2 functions
* Set appropriate PRF function and other SSL / TLS / TLS1.2 functions
*/
if( ssl->minor_ver == SSL_MINOR_VERSION_0 )
{
ssl->tls_prf = tls1_prf;
ssl->calc_finished = ssl_calc_finished_ssl;
}
else if( ssl->minor_ver < SSL_MINOR_VERSION_3 )
{
ssl->tls_prf = tls1_prf;
ssl->calc_finished = ssl_calc_finished_tls;
}
else if( ssl->session->ciphersuite == SSL_RSA_AES_256_GCM_SHA384 ||
ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_GCM_SHA384 )
{
ssl->tls_prf = tls_prf_sha384;
ssl->calc_finished = ssl_calc_finished_tls_sha384;
}
else
ssl->calc_finished = ssl_calc_finished_tls1_2;
{
ssl->tls_prf = tls_prf_sha256;
ssl->calc_finished = ssl_calc_finished_tls_sha256;
}
/*
* SSLv3:
@ -337,6 +389,21 @@ int ssl_derive_keys( ssl_context *ssl )
ssl->ivlen = 16; ssl->maclen = 32;
break;
#endif
#if defined(POLARSSL_GCM_C)
case SSL_RSA_AES_128_GCM_SHA256:
case SSL_EDH_RSA_AES_128_GCM_SHA256:
ssl->keylen = 16; ssl->minlen = 1;
ssl->ivlen = 12; ssl->maclen = 0;
ssl->fixed_ivlen = 4;
break;
case SSL_RSA_AES_256_GCM_SHA384:
case SSL_EDH_RSA_AES_256_GCM_SHA384:
ssl->keylen = 32; ssl->minlen = 1;
ssl->ivlen = 12; ssl->maclen = 0;
ssl->fixed_ivlen = 4;
break;
#endif
#endif
#if defined(POLARSSL_CAMELLIA_C)
@ -417,9 +484,10 @@ int ssl_derive_keys( ssl_context *ssl )
/*
* This is not used in TLS v1.1.
*/
memcpy( ssl->iv_enc, key2 + ssl->keylen, ssl->ivlen );
memcpy( ssl->iv_dec, key2 + ssl->keylen + ssl->ivlen,
ssl->ivlen );
iv_copy_len = ( ssl->fixed_ivlen ) ? ssl->fixed_ivlen : ssl->ivlen;
memcpy( ssl->iv_enc, key2 + ssl->keylen, iv_copy_len );
memcpy( ssl->iv_dec, key2 + ssl->keylen + iv_copy_len,
iv_copy_len );
}
else
{
@ -432,9 +500,10 @@ int ssl_derive_keys( ssl_context *ssl )
/*
* This is not used in TLS v1.1.
*/
memcpy( ssl->iv_dec, key1 + ssl->keylen, ssl->ivlen );
memcpy( ssl->iv_enc, key1 + ssl->keylen + ssl->ivlen,
ssl->ivlen );
iv_copy_len = ( ssl->fixed_ivlen ) ? ssl->fixed_ivlen : ssl->ivlen;
memcpy( ssl->iv_dec, key1 + ssl->keylen, iv_copy_len );
memcpy( ssl->iv_enc, key1 + ssl->keylen + iv_copy_len,
iv_copy_len );
}
switch( ssl->session->ciphersuite )
@ -458,42 +527,48 @@ int ssl_derive_keys( ssl_context *ssl )
#if defined(POLARSSL_AES_C)
case SSL_RSA_AES_128_SHA:
case SSL_EDH_RSA_AES_128_SHA:
#if defined(POLARSSL_SHA2_C)
case SSL_RSA_AES_128_SHA256:
case SSL_EDH_RSA_AES_128_SHA256:
#endif
aes_setkey_enc( (aes_context *) ssl->ctx_enc, key1, 128 );
aes_setkey_dec( (aes_context *) ssl->ctx_dec, key2, 128 );
break;
case SSL_RSA_AES_256_SHA:
case SSL_EDH_RSA_AES_256_SHA:
#if defined(POLARSSL_SHA2_C)
case SSL_RSA_AES_256_SHA256:
case SSL_EDH_RSA_AES_256_SHA256:
#endif
aes_setkey_enc( (aes_context *) ssl->ctx_enc, key1, 256 );
aes_setkey_dec( (aes_context *) ssl->ctx_dec, key2, 256 );
break;
#if defined(POLARSSL_GCM_C)
case SSL_RSA_AES_128_GCM_SHA256:
case SSL_EDH_RSA_AES_128_GCM_SHA256:
gcm_init( (gcm_context *) ssl->ctx_enc, key1, 128 );
gcm_init( (gcm_context *) ssl->ctx_dec, key2, 128 );
break;
case SSL_RSA_AES_256_GCM_SHA384:
case SSL_EDH_RSA_AES_256_GCM_SHA384:
gcm_init( (gcm_context *) ssl->ctx_enc, key1, 256 );
gcm_init( (gcm_context *) ssl->ctx_dec, key2, 256 );
break;
#endif
#endif
#if defined(POLARSSL_CAMELLIA_C)
case SSL_RSA_CAMELLIA_128_SHA:
case SSL_EDH_RSA_CAMELLIA_128_SHA:
#if defined(POLARSSL_SHA2_C)
case SSL_RSA_CAMELLIA_128_SHA256:
case SSL_EDH_RSA_CAMELLIA_128_SHA256:
#endif
camellia_setkey_enc( (camellia_context *) ssl->ctx_enc, key1, 128 );
camellia_setkey_dec( (camellia_context *) ssl->ctx_dec, key2, 128 );
break;
case SSL_RSA_CAMELLIA_256_SHA:
case SSL_EDH_RSA_CAMELLIA_256_SHA:
#if defined(POLARSSL_SHA2_C)
case SSL_RSA_CAMELLIA_256_SHA256:
case SSL_EDH_RSA_CAMELLIA_256_SHA256:
#endif
camellia_setkey_enc( (camellia_context *) ssl->ctx_enc, key1, 256 );
camellia_setkey_dec( (camellia_context *) ssl->ctx_dec, key2, 256 );
break;
@ -527,11 +602,12 @@ int ssl_derive_keys( ssl_context *ssl )
return( 0 );
}
void ssl_calc_verify( ssl_context *ssl, unsigned char hash[36] )
void ssl_calc_verify( ssl_context *ssl, unsigned char hash[48] )
{
md5_context md5;
sha1_context sha1;
sha2_context sha2;
sha4_context sha4;
unsigned char pad_1[48];
unsigned char pad_2[48];
@ -540,6 +616,7 @@ void ssl_calc_verify( ssl_context *ssl, unsigned char hash[36] )
memcpy( &md5 , &ssl->fin_md5 , sizeof( md5_context ) );
memcpy( &sha1, &ssl->fin_sha1, sizeof( sha1_context ) );
memcpy( &sha2, &ssl->fin_sha2, sizeof( sha2_context ) );
memcpy( &sha4, &ssl->fin_sha4, sizeof( sha4_context ) );
if( ssl->minor_ver == SSL_MINOR_VERSION_0 )
{
@ -571,12 +648,17 @@ void ssl_calc_verify( ssl_context *ssl, unsigned char hash[36] )
md5_finish( &md5, hash );
sha1_finish( &sha1, hash + 16 );
}
else if( ssl->session->ciphersuite == SSL_RSA_AES_256_GCM_SHA384 ||
ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_GCM_SHA384 )
{
sha4_finish( &sha4, hash );
}
else
{
sha2_finish( &sha2, hash );
}
SSL_DEBUG_BUF( 3, "calculated verify result", hash, 36 );
SSL_DEBUG_BUF( 3, "calculated verify result", hash, 48 );
SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
return;
@ -690,10 +772,6 @@ static int ssl_encrypt_buf( ssl_context *ssl )
ssl->out_msglen += ssl->maclen;
for( i = 8; i > 0; i-- )
if( ++ssl->out_ctr[i - 1] != 0 )
break;
if( ssl->ivlen == 0 )
{
padlen = 0;
@ -723,6 +801,82 @@ static int ssl_encrypt_buf( ssl_context *ssl )
#endif
return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
}
else if( ssl->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->ciphersuite == SSL_RSA_AES_128_GCM_SHA256 ||
ssl->session->ciphersuite == SSL_EDH_RSA_AES_128_GCM_SHA256 ||
ssl->session->ciphersuite == SSL_RSA_AES_256_GCM_SHA384 ||
ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_GCM_SHA384 )
{
/*
* Generate IV
*/
ret = ssl->f_rng( ssl->p_rng, ssl->iv_enc + ssl->fixed_ivlen,
ssl->ivlen - ssl->fixed_ivlen );
if( ret != 0 )
return( ret );
/*
* Shift message for ivlen bytes and prepend IV
*/
memmove( ssl->out_msg + ssl->ivlen - ssl->fixed_ivlen,
ssl->out_msg, ssl->out_msglen );
memcpy( ssl->out_msg, ssl->iv_enc + ssl->fixed_ivlen,
ssl->ivlen - ssl->fixed_ivlen );
/*
* Fix pointer positions and message length with added IV
*/
enc_msg = ssl->out_msg + ssl->ivlen - ssl->fixed_ivlen;
enc_msglen = ssl->out_msglen;
ssl->out_msglen += ssl->ivlen - ssl->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->ctx_enc,
GCM_ENCRYPT, enc_msglen,
ssl->iv_enc, ssl->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;
@ -834,6 +988,10 @@ static int ssl_encrypt_buf( ssl_context *ssl )
}
}
for( i = 8; i > 0; i-- )
if( ++ssl->out_ctr[i - 1] != 0 )
break;
SSL_DEBUG_MSG( 2, ( "<= encrypt buf" ) );
return( 0 );
@ -879,6 +1037,65 @@ static int ssl_decrypt_buf( ssl_context *ssl )
#endif
return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
}
else if( ssl->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;
padlen = 0;
#if defined(POLARSSL_AES_C) && defined(POLARSSL_GCM_C)
if( ssl->session->ciphersuite == SSL_RSA_AES_128_GCM_SHA256 ||
ssl->session->ciphersuite == SSL_EDH_RSA_AES_128_GCM_SHA256 ||
ssl->session->ciphersuite == SSL_RSA_AES_256_GCM_SHA384 ||
ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_GCM_SHA384 )
{
dec_msglen = ssl->in_msglen - ( ssl->ivlen - ssl->fixed_ivlen );
dec_msglen -= 16;
dec_msg = ssl->in_msg + ( ssl->ivlen - ssl->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->iv_dec + ssl->fixed_ivlen, ssl->in_msg,
ssl->ivlen - ssl->fixed_ivlen );
SSL_DEBUG_BUF( 4, "IV used", ssl->iv_dec, ssl->ivlen );
SSL_DEBUG_BUF( 4, "TAG used", dec_msg + dec_msglen, 16 );
memcpy( ssl->iv_dec + ssl->fixed_ivlen, ssl->in_msg,
ssl->ivlen - ssl->fixed_ivlen );
ret = gcm_auth_decrypt( (gcm_context *) ssl->ctx_dec,
dec_msglen,
ssl->iv_dec, ssl->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
{
unsigned char *dec_msg;
@ -1063,7 +1280,7 @@ static int ssl_decrypt_buf( ssl_context *ssl )
* Finally check the padding length; bad padding
* will produce the same error as an invalid MAC.
*/
if( ssl->ivlen != 0 && padlen == 0 )
if( ssl->ivlen != 0 && ssl->ivlen != 12 && padlen == 0 )
return( POLARSSL_ERR_SSL_INVALID_MAC );
if( ssl->in_msglen == 0 )
@ -1181,6 +1398,7 @@ int ssl_write_record( ssl_context *ssl )
md5_update( &ssl->fin_md5 , ssl->out_msg, len );
sha1_update( &ssl->fin_sha1, ssl->out_msg, len );
sha2_update( &ssl->fin_sha2, ssl->out_msg, len );
sha4_update( &ssl->fin_sha4, ssl->out_msg, len );
}
if( ssl->do_crypt != 0 )
@ -1256,6 +1474,7 @@ int ssl_read_record( ssl_context *ssl )
md5_update( &ssl->fin_md5 , ssl->in_msg, ssl->in_hslen );
sha1_update( &ssl->fin_sha1, ssl->in_msg, ssl->in_hslen );
sha2_update( &ssl->fin_sha2, ssl->in_msg, ssl->in_hslen );
sha4_update( &ssl->fin_sha4, ssl->in_msg, ssl->in_hslen );
return( 0 );
}
@ -1402,6 +1621,7 @@ int ssl_read_record( ssl_context *ssl )
md5_update( &ssl->fin_md5 , ssl->in_msg, ssl->in_hslen );
sha1_update( &ssl->fin_sha1, ssl->in_msg, ssl->in_hslen );
sha2_update( &ssl->fin_sha2, ssl->in_msg, ssl->in_hslen );
sha4_update( &ssl->fin_sha4, ssl->in_msg, ssl->in_hslen );
}
if( ssl->in_msgtype == SSL_MSG_ALERT )
@ -1888,7 +2108,7 @@ static void ssl_calc_finished_tls(
SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
}
static void ssl_calc_finished_tls1_2(
static void ssl_calc_finished_tls_sha256(
ssl_context *ssl, unsigned char *buf, int from )
{
int len = 12;
@ -1927,6 +2147,45 @@ static void ssl_calc_finished_tls1_2(
SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
}
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_DEBUG_MSG( 2, ( "=> calc finished tls 1.2" ) );
memcpy( &sha4, &ssl->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->tls_prf( ssl->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" ) );
}
int ssl_write_finished( ssl_context *ssl )
{
int ret, hash_len;
@ -2064,6 +2323,7 @@ int ssl_init( ssl_context *ssl )
md5_starts( &ssl->fin_md5 );
sha1_starts( &ssl->fin_sha1 );
sha2_starts( &ssl->fin_sha2, 0 );
sha4_starts( &ssl->fin_sha4, 1 );
return( 0 );
}
@ -2110,6 +2370,7 @@ void ssl_session_reset( ssl_context *ssl )
md5_starts( &ssl->fin_md5 );
sha1_starts( &ssl->fin_sha1 );
sha2_starts( &ssl->fin_sha2, 0 );
sha4_starts( &ssl->fin_sha4, 1 );
}
/*
@ -2326,8 +2587,24 @@ const char *ssl_get_ciphersuite_name( const int ciphersuite_id )
case SSL_EDH_RSA_AES_256_SHA256:
return( "SSL-EDH-RSA-AES-256-SHA256" );
#endif
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
case SSL_RSA_AES_128_GCM_SHA256:
return( "SSL-RSA-AES-128-GCM-SHA256" );
case SSL_EDH_RSA_AES_128_GCM_SHA256:
return( "SSL-EDH-RSA-AES-128-GCM-SHA256" );
#endif
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
case SSL_RSA_AES_256_GCM_SHA384:
return( "SSL-RSA-AES-256-GCM-SHA384" );
case SSL_EDH_RSA_AES_256_GCM_SHA384:
return( "SSL-EDH-RSA-AES-256-GCM-SHA384" );
#endif
#endif /* POLARSSL_AES_C */
#if defined(POLARSSL_CAMELLIA_C)
case SSL_RSA_CAMELLIA_128_SHA:
return( "SSL-RSA-CAMELLIA-128-SHA" );
@ -2417,6 +2694,20 @@ int ssl_get_ciphersuite_id( const char *ciphersuite_name )
if (0 == strcasecmp(ciphersuite_name, "SSL-EDH-RSA-AES-256-SHA256"))
return( SSL_EDH_RSA_AES_256_SHA256 );
#endif
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
if (0 == strcasecmp(ciphersuite_name, "SSL-RSA-AES-128-GCM-SHA256"))
return( SSL_RSA_AES_128_GCM_SHA256 );
if (0 == strcasecmp(ciphersuite_name, "SSL-EDH-RSA-AES-128-GCM-SHA256"))
return( SSL_EDH_RSA_AES_128_GCM_SHA256 );
#endif
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
if (0 == strcasecmp(ciphersuite_name, "SSL-RSA-AES-256-GCM-SHA384"))
return( SSL_RSA_AES_256_GCM_SHA384 );
if (0 == strcasecmp(ciphersuite_name, "SSL-EDH-RSA-AES-256-GCM-SHA384"))
return( SSL_EDH_RSA_AES_256_GCM_SHA384 );
#endif
#endif
#if defined(POLARSSL_CAMELLIA_C)
@ -2495,17 +2786,27 @@ int ssl_default_ciphersuites[] =
#if defined(POLARSSL_AES_C)
#if defined(POLARSSL_SHA2_C)
SSL_EDH_RSA_AES_256_SHA256,
SSL_EDH_RSA_AES_128_SHA256,
#endif /* POLARSSL_SHA2_C */
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
SSL_EDH_RSA_AES_256_GCM_SHA384,
#endif
SSL_EDH_RSA_AES_256_SHA,
#if defined(POLARSSL_SHA2_C)
SSL_EDH_RSA_AES_128_SHA256,
#endif
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
SSL_EDH_RSA_AES_128_GCM_SHA256,
#endif
SSL_EDH_RSA_AES_128_SHA,
#endif
#if defined(POLARSSL_CAMELLIA_C)
#if defined(POLARSSL_SHA2_C)
SSL_EDH_RSA_CAMELLIA_256_SHA256,
SSL_EDH_RSA_CAMELLIA_128_SHA256,
#endif /* POLARSSL_SHA2_C */
SSL_EDH_RSA_CAMELLIA_256_SHA,
#if defined(POLARSSL_SHA2_C)
SSL_EDH_RSA_CAMELLIA_128_SHA256,
#endif /* POLARSSL_SHA2_C */
SSL_EDH_RSA_CAMELLIA_128_SHA,
#endif
#if defined(POLARSSL_DES_C)
@ -2516,6 +2817,9 @@ int ssl_default_ciphersuites[] =
#if defined(POLARSSL_AES_C)
#if defined(POLARSSL_SHA2_C)
SSL_RSA_AES_256_SHA256,
#endif /* POLARSSL_SHA2_C */
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
SSL_RSA_AES_256_GCM_SHA384,
#endif /* POLARSSL_SHA2_C */
SSL_RSA_AES_256_SHA,
#endif
@ -2528,6 +2832,9 @@ int ssl_default_ciphersuites[] =
#if defined(POLARSSL_AES_C)
#if defined(POLARSSL_SHA2_C)
SSL_RSA_AES_128_SHA256,
#endif /* POLARSSL_SHA2_C */
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
SSL_RSA_AES_128_GCM_SHA256,
#endif /* POLARSSL_SHA2_C */
SSL_RSA_AES_128_SHA,
#endif

12
programs/ssl/ssl_server.c
View File

@ -80,6 +80,12 @@ int my_ciphersuites[] =
#endif /* POLARSSL_SHA2_C */
SSL_EDH_RSA_AES_256_SHA,
SSL_EDH_RSA_AES_128_SHA,
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
SSL_EDH_RSA_AES_256_GCM_SHA384,
#endif
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
SSL_EDH_RSA_AES_128_GCM_SHA256,
#endif
#endif
#if defined(POLARSSL_CAMELLIA_C)
#if defined(POLARSSL_SHA2_C)
@ -111,6 +117,12 @@ int my_ciphersuites[] =
SSL_RSA_AES_128_SHA256,
#endif /* POLARSSL_SHA2_C */
SSL_RSA_AES_128_SHA,
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
SSL_RSA_AES_256_GCM_SHA384,
#endif
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
SSL_RSA_AES_128_GCM_SHA256,
#endif
#endif
#if defined(POLARSSL_CAMELLIA_C)
#if defined(POLARSSL_SHA2_C)

10
tests/compat.sh
View File

@ -7,7 +7,7 @@ VERIFY=""
if [ "X$VERIFY" = "XYES" ];
then
P_CLIENT_ARGS="crt_file=data_files/server2.crt key_file=data_files/server2.key"
O_SERVER_ARGS="-verify 10"
O_SERVER_ARGS="-verify 10 -CAfile data_files/test-ca.crt"
fi
for MODE in $MODES;
@ -61,6 +61,10 @@ then
SSL-EDH-RSA-AES-128-SHA256 \
SSL-RSA-AES-256-SHA256 \
SSL-EDH-RSA-AES-256-SHA256 \
SSL-RSA-AES-128-GCM-SHA256 \
SSL-EDH-RSA-AES-128-GCM-SHA256 \
SSL-RSA-AES-256-GCM-SHA384 \
SSL-EDH-RSA-AES-256-GCM-SHA384 \
"
O_CIPHERS="$O_CIPHERS \
@ -69,6 +73,10 @@ then
DHE-RSA-AES128-SHA256 \
AES256-SHA256 \
DHE-RSA-AES256-SHA256 \
AES128-GCM-SHA256 \
DHE-RSA-AES128-GCM-SHA256 \
AES256-GCM-SHA384 \
DHE-RSA-AES256-GCM-SHA384 \
"
fi