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			678 lines
		
	
	
	
		
			22 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			678 lines
		
	
	
	
		
			22 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
| /*
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|  * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
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|  * Copyright 2005 Nokia. All rights reserved.
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|  *
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|  * Licensed under the OpenSSL license (the "License").  You may not use
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|  * this file except in compliance with the License.  You can obtain a copy
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|  * in the file LICENSE in the source distribution or at
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|  * https://www.openssl.org/source/license.html
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|  */
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| 
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| #include <stdio.h>
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| #include "ssl_local.h"
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| #include <openssl/comp.h>
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| #include <openssl/evp.h>
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| #include <openssl/kdf.h>
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| #include <openssl/rand.h>
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| 
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| /* seed1 through seed5 are concatenated */
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| static int tls1_PRF(SSL *s,
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|                     const void *seed1, size_t seed1_len,
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|                     const void *seed2, size_t seed2_len,
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|                     const void *seed3, size_t seed3_len,
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|                     const void *seed4, size_t seed4_len,
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|                     const void *seed5, size_t seed5_len,
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|                     const unsigned char *sec, size_t slen,
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|                     unsigned char *out, size_t olen, int fatal)
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| {
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|     const EVP_MD *md = ssl_prf_md(s);
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|     EVP_PKEY_CTX *pctx = NULL;
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|     int ret = 0;
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| 
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|     if (md == NULL) {
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|         /* Should never happen */
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|         if (fatal)
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|             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF,
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|                      ERR_R_INTERNAL_ERROR);
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|         else
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|             SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
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|         return 0;
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|     }
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|     pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_TLS1_PRF, NULL);
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|     if (pctx == NULL || EVP_PKEY_derive_init(pctx) <= 0
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|         || EVP_PKEY_CTX_set_tls1_prf_md(pctx, md) <= 0
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|         || EVP_PKEY_CTX_set1_tls1_prf_secret(pctx, sec, (int)slen) <= 0
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|         || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed1, (int)seed1_len) <= 0
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|         || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed2, (int)seed2_len) <= 0
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|         || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed3, (int)seed3_len) <= 0
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|         || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed4, (int)seed4_len) <= 0
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|         || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed5, (int)seed5_len) <= 0
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|         || EVP_PKEY_derive(pctx, out, &olen) <= 0) {
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|         if (fatal)
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|             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF,
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|                      ERR_R_INTERNAL_ERROR);
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|         else
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|             SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
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|         goto err;
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|     }
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| 
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|     ret = 1;
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| 
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|  err:
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|     EVP_PKEY_CTX_free(pctx);
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|     return ret;
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| }
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| 
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| static int tls1_generate_key_block(SSL *s, unsigned char *km, size_t num)
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| {
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|     int ret;
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| 
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|     /* Calls SSLfatal() as required */
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|     ret = tls1_PRF(s,
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|                    TLS_MD_KEY_EXPANSION_CONST,
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|                    TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3->server_random,
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|                    SSL3_RANDOM_SIZE, s->s3->client_random, SSL3_RANDOM_SIZE,
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|                    NULL, 0, NULL, 0, s->session->master_key,
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|                    s->session->master_key_length, km, num, 1);
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| 
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|     return ret;
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| }
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| 
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| int tls1_change_cipher_state(SSL *s, int which)
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| {
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|     unsigned char *p, *mac_secret;
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|     unsigned char *ms, *key, *iv;
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|     EVP_CIPHER_CTX *dd;
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|     const EVP_CIPHER *c;
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| #ifndef OPENSSL_NO_COMP
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|     const SSL_COMP *comp;
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| #endif
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|     const EVP_MD *m;
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|     int mac_type;
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|     size_t *mac_secret_size;
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|     EVP_MD_CTX *mac_ctx;
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|     EVP_PKEY *mac_key;
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|     size_t n, i, j, k, cl;
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|     int reuse_dd = 0;
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| 
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|     c = s->s3->tmp.new_sym_enc;
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|     m = s->s3->tmp.new_hash;
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|     mac_type = s->s3->tmp.new_mac_pkey_type;
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| #ifndef OPENSSL_NO_COMP
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|     comp = s->s3->tmp.new_compression;
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| #endif
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| 
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|     if (which & SSL3_CC_READ) {
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|         if (s->ext.use_etm)
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|             s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
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|         else
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|             s->s3->flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
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| 
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|         if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
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|             s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
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|         else
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|             s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
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| 
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|         if (s->enc_read_ctx != NULL) {
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|             reuse_dd = 1;
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|         } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
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|             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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|                      ERR_R_MALLOC_FAILURE);
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|             goto err;
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|         } else {
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|             /*
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|              * make sure it's initialised in case we exit later with an error
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|              */
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|             EVP_CIPHER_CTX_reset(s->enc_read_ctx);
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|         }
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|         dd = s->enc_read_ctx;
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|         mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
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|         if (mac_ctx == NULL)
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|             goto err;
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| #ifndef OPENSSL_NO_COMP
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|         COMP_CTX_free(s->expand);
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|         s->expand = NULL;
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|         if (comp != NULL) {
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|             s->expand = COMP_CTX_new(comp->method);
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|             if (s->expand == NULL) {
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|                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
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|                          SSL_F_TLS1_CHANGE_CIPHER_STATE,
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|                          SSL_R_COMPRESSION_LIBRARY_ERROR);
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|                 goto err;
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|             }
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|         }
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| #endif
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|         /*
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|          * this is done by dtls1_reset_seq_numbers for DTLS
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|          */
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|         if (!SSL_IS_DTLS(s))
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|             RECORD_LAYER_reset_read_sequence(&s->rlayer);
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|         mac_secret = &(s->s3->read_mac_secret[0]);
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|         mac_secret_size = &(s->s3->read_mac_secret_size);
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|     } else {
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|         s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
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|         if (s->ext.use_etm)
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|             s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
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|         else
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|             s->s3->flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
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| 
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|         if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
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|             s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
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|         else
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|             s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
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|         if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) {
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|             reuse_dd = 1;
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|         } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
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|             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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|                      ERR_R_MALLOC_FAILURE);
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|             goto err;
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|         }
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|         dd = s->enc_write_ctx;
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|         if (SSL_IS_DTLS(s)) {
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|             mac_ctx = EVP_MD_CTX_new();
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|             if (mac_ctx == NULL) {
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|                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
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|                          SSL_F_TLS1_CHANGE_CIPHER_STATE,
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|                          ERR_R_MALLOC_FAILURE);
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|                 goto err;
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|             }
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|             s->write_hash = mac_ctx;
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|         } else {
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|             mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
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|             if (mac_ctx == NULL) {
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|                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
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|                          SSL_F_TLS1_CHANGE_CIPHER_STATE,
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|                          ERR_R_MALLOC_FAILURE);
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|                 goto err;
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|             }
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|         }
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| #ifndef OPENSSL_NO_COMP
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|         COMP_CTX_free(s->compress);
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|         s->compress = NULL;
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|         if (comp != NULL) {
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|             s->compress = COMP_CTX_new(comp->method);
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|             if (s->compress == NULL) {
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|                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
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|                          SSL_F_TLS1_CHANGE_CIPHER_STATE,
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|                         SSL_R_COMPRESSION_LIBRARY_ERROR);
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|                 goto err;
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|             }
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|         }
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| #endif
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|         /*
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|          * this is done by dtls1_reset_seq_numbers for DTLS
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|          */
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|         if (!SSL_IS_DTLS(s))
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|             RECORD_LAYER_reset_write_sequence(&s->rlayer);
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|         mac_secret = &(s->s3->write_mac_secret[0]);
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|         mac_secret_size = &(s->s3->write_mac_secret_size);
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|     }
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| 
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|     if (reuse_dd)
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|         EVP_CIPHER_CTX_reset(dd);
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| 
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|     p = s->s3->tmp.key_block;
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|     i = *mac_secret_size = s->s3->tmp.new_mac_secret_size;
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| 
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|     /* TODO(size_t): convert me */
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|     cl = EVP_CIPHER_key_length(c);
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|     j = cl;
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|     /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
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|     /* If GCM/CCM mode only part of IV comes from PRF */
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|     if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
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|         k = EVP_GCM_TLS_FIXED_IV_LEN;
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|     else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE)
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|         k = EVP_CCM_TLS_FIXED_IV_LEN;
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|     else
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|         k = EVP_CIPHER_iv_length(c);
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|     if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
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|         (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
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|         ms = &(p[0]);
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|         n = i + i;
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|         key = &(p[n]);
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|         n += j + j;
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|         iv = &(p[n]);
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|         n += k + k;
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|     } else {
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|         n = i;
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|         ms = &(p[n]);
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|         n += i + j;
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|         key = &(p[n]);
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|         n += j + k;
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|         iv = &(p[n]);
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|         n += k;
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|     }
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| 
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|     if (n > s->s3->tmp.key_block_length) {
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|         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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|                  ERR_R_INTERNAL_ERROR);
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|         goto err;
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|     }
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| 
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|     memcpy(mac_secret, ms, i);
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| 
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|     if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
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|         /* TODO(size_t): Convert this function */
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|         mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
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|                                                (int)*mac_secret_size);
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|         if (mac_key == NULL
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|             || EVP_DigestSignInit(mac_ctx, NULL, m, NULL, mac_key) <= 0) {
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|             EVP_PKEY_free(mac_key);
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|             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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|                      ERR_R_INTERNAL_ERROR);
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|             goto err;
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|         }
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|         EVP_PKEY_free(mac_key);
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|     }
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| #ifdef SSL_DEBUG
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|     printf("which = %04X\nmac key=", which);
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|     {
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|         size_t z;
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|         for (z = 0; z < i; z++)
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|             printf("%02X%c", ms[z], ((z + 1) % 16) ? ' ' : '\n');
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|     }
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| #endif
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| 
 | |
|     if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
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|         if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
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|             || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
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|                                     iv)) {
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|             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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|                      ERR_R_INTERNAL_ERROR);
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|             goto err;
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|         }
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|     } else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) {
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|         int taglen;
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|         if (s->s3->tmp.
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|             new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8))
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|             taglen = EVP_CCM8_TLS_TAG_LEN;
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|         else
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|             taglen = EVP_CCM_TLS_TAG_LEN;
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|         if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
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|             || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL)
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|             || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL)
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|             || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv)
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|             || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
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|             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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|                      ERR_R_INTERNAL_ERROR);
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|             goto err;
 | |
|         }
 | |
|     } else {
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|         if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
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|             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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|                      ERR_R_INTERNAL_ERROR);
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|             goto err;
 | |
|         }
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|     }
 | |
|     /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
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|     if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
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|         && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
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|                                 (int)*mac_secret_size, mac_secret)) {
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|         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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|                  ERR_R_INTERNAL_ERROR);
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|         goto err;
 | |
|     }
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|     s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
 | |
| 
 | |
| #ifdef SSL_DEBUG
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|     printf("which = %04X\nkey=", which);
 | |
|     {
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|         int z;
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|         for (z = 0; z < EVP_CIPHER_key_length(c); z++)
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|             printf("%02X%c", key[z], ((z + 1) % 16) ? ' ' : '\n');
 | |
|     }
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|     printf("\niv=");
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|     {
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|         size_t z;
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|         for (z = 0; z < k; z++)
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|             printf("%02X%c", iv[z], ((z + 1) % 16) ? ' ' : '\n');
 | |
|     }
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|     printf("\n");
 | |
| #endif
 | |
| 
 | |
|     return 1;
 | |
|  err:
 | |
|     return 0;
 | |
| }
 | |
| 
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| int tls1_setup_key_block(SSL *s)
 | |
| {
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|     unsigned char *p;
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|     const EVP_CIPHER *c;
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|     const EVP_MD *hash;
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|     SSL_COMP *comp;
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|     int mac_type = NID_undef;
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|     size_t num, mac_secret_size = 0;
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|     int ret = 0;
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| 
 | |
|     if (s->s3->tmp.key_block_length != 0)
 | |
|         return 1;
 | |
| 
 | |
|     if (!ssl_cipher_get_evp(s->session, &c, &hash, &mac_type, &mac_secret_size,
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|                             &comp, s->ext.use_etm)) {
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|         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
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|                  SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 | |
|         return 0;
 | |
|     }
 | |
| 
 | |
|     s->s3->tmp.new_sym_enc = c;
 | |
|     s->s3->tmp.new_hash = hash;
 | |
|     s->s3->tmp.new_mac_pkey_type = mac_type;
 | |
|     s->s3->tmp.new_mac_secret_size = mac_secret_size;
 | |
|     num = EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c);
 | |
|     num *= 2;
 | |
| 
 | |
|     ssl3_cleanup_key_block(s);
 | |
| 
 | |
|     if ((p = OPENSSL_malloc(num)) == NULL) {
 | |
|         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
 | |
|                  ERR_R_MALLOC_FAILURE);
 | |
|         goto err;
 | |
|     }
 | |
| 
 | |
|     s->s3->tmp.key_block_length = num;
 | |
|     s->s3->tmp.key_block = p;
 | |
| 
 | |
| #ifdef SSL_DEBUG
 | |
|     printf("client random\n");
 | |
|     {
 | |
|         int z;
 | |
|         for (z = 0; z < SSL3_RANDOM_SIZE; z++)
 | |
|             printf("%02X%c", s->s3->client_random[z],
 | |
|                    ((z + 1) % 16) ? ' ' : '\n');
 | |
|     }
 | |
|     printf("server random\n");
 | |
|     {
 | |
|         int z;
 | |
|         for (z = 0; z < SSL3_RANDOM_SIZE; z++)
 | |
|             printf("%02X%c", s->s3->server_random[z],
 | |
|                    ((z + 1) % 16) ? ' ' : '\n');
 | |
|     }
 | |
|     printf("master key\n");
 | |
|     {
 | |
|         size_t z;
 | |
|         for (z = 0; z < s->session->master_key_length; z++)
 | |
|             printf("%02X%c", s->session->master_key[z],
 | |
|                    ((z + 1) % 16) ? ' ' : '\n');
 | |
|     }
 | |
| #endif
 | |
|     if (!tls1_generate_key_block(s, p, num)) {
 | |
|         /* SSLfatal() already called */
 | |
|         goto err;
 | |
|     }
 | |
| #ifdef SSL_DEBUG
 | |
|     printf("\nkey block\n");
 | |
|     {
 | |
|         size_t z;
 | |
|         for (z = 0; z < num; z++)
 | |
|             printf("%02X%c", p[z], ((z + 1) % 16) ? ' ' : '\n');
 | |
|     }
 | |
| #endif
 | |
| 
 | |
|     if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
 | |
|         && s->method->version <= TLS1_VERSION) {
 | |
|         /*
 | |
|          * enable vulnerability countermeasure for CBC ciphers with known-IV
 | |
|          * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 | |
|          */
 | |
|         s->s3->need_empty_fragments = 1;
 | |
| 
 | |
|         if (s->session->cipher != NULL) {
 | |
|             if (s->session->cipher->algorithm_enc == SSL_eNULL)
 | |
|                 s->s3->need_empty_fragments = 0;
 | |
| 
 | |
| #ifndef OPENSSL_NO_RC4
 | |
|             if (s->session->cipher->algorithm_enc == SSL_RC4)
 | |
|                 s->s3->need_empty_fragments = 0;
 | |
| #endif
 | |
|         }
 | |
|     }
 | |
| 
 | |
|     ret = 1;
 | |
|  err:
 | |
|     return ret;
 | |
| }
 | |
| 
 | |
| size_t tls1_final_finish_mac(SSL *s, const char *str, size_t slen,
 | |
|                              unsigned char *out)
 | |
| {
 | |
|     size_t hashlen;
 | |
|     unsigned char hash[EVP_MAX_MD_SIZE];
 | |
| 
 | |
|     if (!ssl3_digest_cached_records(s, 0)) {
 | |
|         /* SSLfatal() already called */
 | |
|         return 0;
 | |
|     }
 | |
| 
 | |
|     if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
 | |
|         /* SSLfatal() already called */
 | |
|         return 0;
 | |
|     }
 | |
| 
 | |
|     if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
 | |
|                   s->session->master_key, s->session->master_key_length,
 | |
|                   out, TLS1_FINISH_MAC_LENGTH, 1)) {
 | |
|         /* SSLfatal() already called */
 | |
|         return 0;
 | |
|     }
 | |
|     OPENSSL_cleanse(hash, hashlen);
 | |
|     return TLS1_FINISH_MAC_LENGTH;
 | |
| }
 | |
| 
 | |
| int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
 | |
|                                 size_t len, size_t *secret_size)
 | |
| {
 | |
|     if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
 | |
|         unsigned char hash[EVP_MAX_MD_SIZE * 2];
 | |
|         size_t hashlen;
 | |
|         /*
 | |
|          * Digest cached records keeping record buffer (if present): this won't
 | |
|          * affect client auth because we're freezing the buffer at the same
 | |
|          * point (after client key exchange and before certificate verify)
 | |
|          */
 | |
|         if (!ssl3_digest_cached_records(s, 1)
 | |
|                 || !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
 | |
|             /* SSLfatal() already called */
 | |
|             return 0;
 | |
|         }
 | |
| #ifdef SSL_DEBUG
 | |
|         fprintf(stderr, "Handshake hashes:\n");
 | |
|         BIO_dump_fp(stderr, (char *)hash, hashlen);
 | |
| #endif
 | |
|         if (!tls1_PRF(s,
 | |
|                       TLS_MD_EXTENDED_MASTER_SECRET_CONST,
 | |
|                       TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
 | |
|                       hash, hashlen,
 | |
|                       NULL, 0,
 | |
|                       NULL, 0,
 | |
|                       NULL, 0, p, len, out,
 | |
|                       SSL3_MASTER_SECRET_SIZE, 1)) {
 | |
|             /* SSLfatal() already called */
 | |
|             return 0;
 | |
|         }
 | |
|         OPENSSL_cleanse(hash, hashlen);
 | |
|     } else {
 | |
|         if (!tls1_PRF(s,
 | |
|                       TLS_MD_MASTER_SECRET_CONST,
 | |
|                       TLS_MD_MASTER_SECRET_CONST_SIZE,
 | |
|                       s->s3->client_random, SSL3_RANDOM_SIZE,
 | |
|                       NULL, 0,
 | |
|                       s->s3->server_random, SSL3_RANDOM_SIZE,
 | |
|                       NULL, 0, p, len, out,
 | |
|                       SSL3_MASTER_SECRET_SIZE, 1)) {
 | |
|            /* SSLfatal() already called */
 | |
|             return 0;
 | |
|         }
 | |
|     }
 | |
| #ifdef SSL_DEBUG
 | |
|     fprintf(stderr, "Premaster Secret:\n");
 | |
|     BIO_dump_fp(stderr, (char *)p, len);
 | |
|     fprintf(stderr, "Client Random:\n");
 | |
|     BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
 | |
|     fprintf(stderr, "Server Random:\n");
 | |
|     BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
 | |
|     fprintf(stderr, "Master Secret:\n");
 | |
|     BIO_dump_fp(stderr, (char *)s->session->master_key,
 | |
|                 SSL3_MASTER_SECRET_SIZE);
 | |
| #endif
 | |
| 
 | |
|     *secret_size = SSL3_MASTER_SECRET_SIZE;
 | |
|     return 1;
 | |
| }
 | |
| 
 | |
| int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
 | |
|                                 const char *label, size_t llen,
 | |
|                                 const unsigned char *context,
 | |
|                                 size_t contextlen, int use_context)
 | |
| {
 | |
|     unsigned char *val = NULL;
 | |
|     size_t vallen = 0, currentvalpos;
 | |
|     int rv;
 | |
| 
 | |
|     /*
 | |
|      * construct PRF arguments we construct the PRF argument ourself rather
 | |
|      * than passing separate values into the TLS PRF to ensure that the
 | |
|      * concatenation of values does not create a prohibited label.
 | |
|      */
 | |
|     vallen = llen + SSL3_RANDOM_SIZE * 2;
 | |
|     if (use_context) {
 | |
|         vallen += 2 + contextlen;
 | |
|     }
 | |
| 
 | |
|     val = OPENSSL_malloc(vallen);
 | |
|     if (val == NULL)
 | |
|         goto err2;
 | |
|     currentvalpos = 0;
 | |
|     memcpy(val + currentvalpos, (unsigned char *)label, llen);
 | |
|     currentvalpos += llen;
 | |
|     memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
 | |
|     currentvalpos += SSL3_RANDOM_SIZE;
 | |
|     memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
 | |
|     currentvalpos += SSL3_RANDOM_SIZE;
 | |
| 
 | |
|     if (use_context) {
 | |
|         val[currentvalpos] = (contextlen >> 8) & 0xff;
 | |
|         currentvalpos++;
 | |
|         val[currentvalpos] = contextlen & 0xff;
 | |
|         currentvalpos++;
 | |
|         if ((contextlen > 0) || (context != NULL)) {
 | |
|             memcpy(val + currentvalpos, context, contextlen);
 | |
|         }
 | |
|     }
 | |
| 
 | |
|     /*
 | |
|      * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
 | |
|      * label len) = 15, so size of val > max(prohibited label len) = 15 and
 | |
|      * the comparisons won't have buffer overflow
 | |
|      */
 | |
|     if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
 | |
|                TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
 | |
|         goto err1;
 | |
|     if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
 | |
|                TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
 | |
|         goto err1;
 | |
|     if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
 | |
|                TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
 | |
|         goto err1;
 | |
|     if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
 | |
|                TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
 | |
|         goto err1;
 | |
|     if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
 | |
|                TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
 | |
|         goto err1;
 | |
| 
 | |
|     rv = tls1_PRF(s,
 | |
|                   val, vallen,
 | |
|                   NULL, 0,
 | |
|                   NULL, 0,
 | |
|                   NULL, 0,
 | |
|                   NULL, 0,
 | |
|                   s->session->master_key, s->session->master_key_length,
 | |
|                   out, olen, 0);
 | |
| 
 | |
|     goto ret;
 | |
|  err1:
 | |
|     SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
 | |
|     rv = 0;
 | |
|     goto ret;
 | |
|  err2:
 | |
|     SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
 | |
|     rv = 0;
 | |
|  ret:
 | |
|     OPENSSL_clear_free(val, vallen);
 | |
|     return rv;
 | |
| }
 | |
| 
 | |
| int tls1_alert_code(int code)
 | |
| {
 | |
|     switch (code) {
 | |
|     case SSL_AD_CLOSE_NOTIFY:
 | |
|         return SSL3_AD_CLOSE_NOTIFY;
 | |
|     case SSL_AD_UNEXPECTED_MESSAGE:
 | |
|         return SSL3_AD_UNEXPECTED_MESSAGE;
 | |
|     case SSL_AD_BAD_RECORD_MAC:
 | |
|         return SSL3_AD_BAD_RECORD_MAC;
 | |
|     case SSL_AD_DECRYPTION_FAILED:
 | |
|         return TLS1_AD_DECRYPTION_FAILED;
 | |
|     case SSL_AD_RECORD_OVERFLOW:
 | |
|         return TLS1_AD_RECORD_OVERFLOW;
 | |
|     case SSL_AD_DECOMPRESSION_FAILURE:
 | |
|         return SSL3_AD_DECOMPRESSION_FAILURE;
 | |
|     case SSL_AD_HANDSHAKE_FAILURE:
 | |
|         return SSL3_AD_HANDSHAKE_FAILURE;
 | |
|     case SSL_AD_NO_CERTIFICATE:
 | |
|         return -1;
 | |
|     case SSL_AD_BAD_CERTIFICATE:
 | |
|         return SSL3_AD_BAD_CERTIFICATE;
 | |
|     case SSL_AD_UNSUPPORTED_CERTIFICATE:
 | |
|         return SSL3_AD_UNSUPPORTED_CERTIFICATE;
 | |
|     case SSL_AD_CERTIFICATE_REVOKED:
 | |
|         return SSL3_AD_CERTIFICATE_REVOKED;
 | |
|     case SSL_AD_CERTIFICATE_EXPIRED:
 | |
|         return SSL3_AD_CERTIFICATE_EXPIRED;
 | |
|     case SSL_AD_CERTIFICATE_UNKNOWN:
 | |
|         return SSL3_AD_CERTIFICATE_UNKNOWN;
 | |
|     case SSL_AD_ILLEGAL_PARAMETER:
 | |
|         return SSL3_AD_ILLEGAL_PARAMETER;
 | |
|     case SSL_AD_UNKNOWN_CA:
 | |
|         return TLS1_AD_UNKNOWN_CA;
 | |
|     case SSL_AD_ACCESS_DENIED:
 | |
|         return TLS1_AD_ACCESS_DENIED;
 | |
|     case SSL_AD_DECODE_ERROR:
 | |
|         return TLS1_AD_DECODE_ERROR;
 | |
|     case SSL_AD_DECRYPT_ERROR:
 | |
|         return TLS1_AD_DECRYPT_ERROR;
 | |
|     case SSL_AD_EXPORT_RESTRICTION:
 | |
|         return TLS1_AD_EXPORT_RESTRICTION;
 | |
|     case SSL_AD_PROTOCOL_VERSION:
 | |
|         return TLS1_AD_PROTOCOL_VERSION;
 | |
|     case SSL_AD_INSUFFICIENT_SECURITY:
 | |
|         return TLS1_AD_INSUFFICIENT_SECURITY;
 | |
|     case SSL_AD_INTERNAL_ERROR:
 | |
|         return TLS1_AD_INTERNAL_ERROR;
 | |
|     case SSL_AD_USER_CANCELLED:
 | |
|         return TLS1_AD_USER_CANCELLED;
 | |
|     case SSL_AD_NO_RENEGOTIATION:
 | |
|         return TLS1_AD_NO_RENEGOTIATION;
 | |
|     case SSL_AD_UNSUPPORTED_EXTENSION:
 | |
|         return TLS1_AD_UNSUPPORTED_EXTENSION;
 | |
|     case SSL_AD_CERTIFICATE_UNOBTAINABLE:
 | |
|         return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
 | |
|     case SSL_AD_UNRECOGNIZED_NAME:
 | |
|         return TLS1_AD_UNRECOGNIZED_NAME;
 | |
|     case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
 | |
|         return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
 | |
|     case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
 | |
|         return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
 | |
|     case SSL_AD_UNKNOWN_PSK_IDENTITY:
 | |
|         return TLS1_AD_UNKNOWN_PSK_IDENTITY;
 | |
|     case SSL_AD_INAPPROPRIATE_FALLBACK:
 | |
|         return TLS1_AD_INAPPROPRIATE_FALLBACK;
 | |
|     case SSL_AD_NO_APPLICATION_PROTOCOL:
 | |
|         return TLS1_AD_NO_APPLICATION_PROTOCOL;
 | |
|     case SSL_AD_CERTIFICATE_REQUIRED:
 | |
|         return SSL_AD_HANDSHAKE_FAILURE;
 | |
|     default:
 | |
|         return -1;
 | |
|     }
 | |
| }
 |