diff options
Diffstat (limited to 'openssl/ssl/s3_enc.c')
| -rw-r--r-- | openssl/ssl/s3_enc.c | 724 |
1 files changed, 724 insertions, 0 deletions
diff --git a/openssl/ssl/s3_enc.c b/openssl/ssl/s3_enc.c new file mode 100644 index 000000000..06e54666b --- /dev/null +++ b/openssl/ssl/s3_enc.c @@ -0,0 +1,724 @@ +/* ssl/s3_enc.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ +/* ==================================================================== + * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include <stdio.h> +#include "ssl_locl.h" +#include <openssl/evp.h> +#include <openssl/md5.h> + +static unsigned char ssl3_pad_1[48]={ + 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36, + 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36, + 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36, + 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36, + 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36, + 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36 }; + +static unsigned char ssl3_pad_2[48]={ + 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c, + 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c, + 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c, + 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c, + 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c, + 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c }; + +static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx, + const char *sender, int len, unsigned char *p); + +static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num) + { + EVP_MD_CTX m5; + EVP_MD_CTX s1; + unsigned char buf[16],smd[SHA_DIGEST_LENGTH]; + unsigned char c='A'; + unsigned int i,j,k; + +#ifdef CHARSET_EBCDIC + c = os_toascii[c]; /*'A' in ASCII */ +#endif + k=0; + EVP_MD_CTX_init(&m5); + EVP_MD_CTX_set_flags(&m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); + EVP_MD_CTX_init(&s1); + for (i=0; (int)i<num; i+=MD5_DIGEST_LENGTH) + { + k++; + if (k > sizeof buf) + { + /* bug: 'buf' is too small for this ciphersuite */ + SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR); + return 0; + } + + for (j=0; j<k; j++) + buf[j]=c; + c++; + EVP_DigestInit_ex(&s1,EVP_sha1(), NULL); + EVP_DigestUpdate(&s1,buf,k); + EVP_DigestUpdate(&s1,s->session->master_key, + s->session->master_key_length); + EVP_DigestUpdate(&s1,s->s3->server_random,SSL3_RANDOM_SIZE); + EVP_DigestUpdate(&s1,s->s3->client_random,SSL3_RANDOM_SIZE); + EVP_DigestFinal_ex(&s1,smd,NULL); + + EVP_DigestInit_ex(&m5,EVP_md5(), NULL); + EVP_DigestUpdate(&m5,s->session->master_key, + s->session->master_key_length); + EVP_DigestUpdate(&m5,smd,SHA_DIGEST_LENGTH); + if ((int)(i+MD5_DIGEST_LENGTH) > num) + { + EVP_DigestFinal_ex(&m5,smd,NULL); + memcpy(km,smd,(num-i)); + } + else + EVP_DigestFinal_ex(&m5,km,NULL); + + km+=MD5_DIGEST_LENGTH; + } + OPENSSL_cleanse(smd,SHA_DIGEST_LENGTH); + EVP_MD_CTX_cleanup(&m5); + EVP_MD_CTX_cleanup(&s1); + return 1; + } + +int ssl3_change_cipher_state(SSL *s, int which) + { + unsigned char *p,*key_block,*mac_secret; + unsigned char exp_key[EVP_MAX_KEY_LENGTH]; + unsigned char exp_iv[EVP_MAX_IV_LENGTH]; + unsigned char *ms,*key,*iv,*er1,*er2; + EVP_CIPHER_CTX *dd; + const EVP_CIPHER *c; +#ifndef OPENSSL_NO_COMP + COMP_METHOD *comp; +#endif + const EVP_MD *m; + EVP_MD_CTX md; + int is_exp,n,i,j,k,cl; + int reuse_dd = 0; + + is_exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); + c=s->s3->tmp.new_sym_enc; + m=s->s3->tmp.new_hash; +#ifndef OPENSSL_NO_COMP + if (s->s3->tmp.new_compression == NULL) + comp=NULL; + else + comp=s->s3->tmp.new_compression->method; +#endif + key_block=s->s3->tmp.key_block; + + if (which & SSL3_CC_READ) + { + if (s->enc_read_ctx != NULL) + reuse_dd = 1; + else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) + goto err; + else + /* make sure it's intialized in case we exit later with an error */ + EVP_CIPHER_CTX_init(s->enc_read_ctx); + dd= s->enc_read_ctx; + s->read_hash=m; +#ifndef OPENSSL_NO_COMP + /* COMPRESS */ + if (s->expand != NULL) + { + COMP_CTX_free(s->expand); + s->expand=NULL; + } + if (comp != NULL) + { + s->expand=COMP_CTX_new(comp); + if (s->expand == NULL) + { + SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); + goto err2; + } + if (s->s3->rrec.comp == NULL) + s->s3->rrec.comp=(unsigned char *) + OPENSSL_malloc(SSL3_RT_MAX_PLAIN_LENGTH); + if (s->s3->rrec.comp == NULL) + goto err; + } +#endif + memset(&(s->s3->read_sequence[0]),0,8); + mac_secret= &(s->s3->read_mac_secret[0]); + } + else + { + if (s->enc_write_ctx != NULL) + reuse_dd = 1; + else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) + goto err; + else + /* make sure it's intialized in case we exit later with an error */ + EVP_CIPHER_CTX_init(s->enc_write_ctx); + dd= s->enc_write_ctx; + s->write_hash=m; +#ifndef OPENSSL_NO_COMP + /* COMPRESS */ + if (s->compress != NULL) + { + COMP_CTX_free(s->compress); + s->compress=NULL; + } + if (comp != NULL) + { + s->compress=COMP_CTX_new(comp); + if (s->compress == NULL) + { + SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); + goto err2; + } + } +#endif + memset(&(s->s3->write_sequence[0]),0,8); + mac_secret= &(s->s3->write_mac_secret[0]); + } + + if (reuse_dd) + EVP_CIPHER_CTX_cleanup(dd); + + p=s->s3->tmp.key_block; + i=EVP_MD_size(m); + cl=EVP_CIPHER_key_length(c); + j=is_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? + cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; + /* Was j=(is_exp)?5:EVP_CIPHER_key_length(c); */ + k=EVP_CIPHER_iv_length(c); + if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || + (which == SSL3_CHANGE_CIPHER_SERVER_READ)) + { + ms= &(p[ 0]); n=i+i; + key= &(p[ n]); n+=j+j; + iv= &(p[ n]); n+=k+k; + er1= &(s->s3->client_random[0]); + er2= &(s->s3->server_random[0]); + } + else + { + n=i; + ms= &(p[ n]); n+=i+j; + key= &(p[ n]); n+=j+k; + iv= &(p[ n]); n+=k; + er1= &(s->s3->server_random[0]); + er2= &(s->s3->client_random[0]); + } + + if (n > s->s3->tmp.key_block_length) + { + SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR); + goto err2; + } + + EVP_MD_CTX_init(&md); + memcpy(mac_secret,ms,i); + if (is_exp) + { + /* In here I set both the read and write key/iv to the + * same value since only the correct one will be used :-). + */ + EVP_DigestInit_ex(&md,EVP_md5(), NULL); + EVP_DigestUpdate(&md,key,j); + EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE); + EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE); + EVP_DigestFinal_ex(&md,&(exp_key[0]),NULL); + key= &(exp_key[0]); + + if (k > 0) + { + EVP_DigestInit_ex(&md,EVP_md5(), NULL); + EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE); + EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE); + EVP_DigestFinal_ex(&md,&(exp_iv[0]),NULL); + iv= &(exp_iv[0]); + } + } + + s->session->key_arg_length=0; + + EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); + + OPENSSL_cleanse(&(exp_key[0]),sizeof(exp_key)); + OPENSSL_cleanse(&(exp_iv[0]),sizeof(exp_iv)); + EVP_MD_CTX_cleanup(&md); + return(1); +err: + SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); +err2: + return(0); + } + +int ssl3_setup_key_block(SSL *s) + { + unsigned char *p; + const EVP_CIPHER *c; + const EVP_MD *hash; + int num; + int ret = 0; + SSL_COMP *comp; + + if (s->s3->tmp.key_block_length != 0) + return(1); + + if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp)) + { + SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); + return(0); + } + + s->s3->tmp.new_sym_enc=c; + s->s3->tmp.new_hash=hash; +#ifdef OPENSSL_NO_COMP + s->s3->tmp.new_compression=NULL; +#else + s->s3->tmp.new_compression=comp; +#endif + + num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c); + num*=2; + + ssl3_cleanup_key_block(s); + + if ((p=OPENSSL_malloc(num)) == NULL) + goto err; + + s->s3->tmp.key_block_length=num; + s->s3->tmp.key_block=p; + + ret = ssl3_generate_key_block(s,p,num); + + if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) + { + /* 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->algorithms & SSL_ENC_MASK) == SSL_eNULL) + s->s3->need_empty_fragments = 0; + +#ifndef OPENSSL_NO_RC4 + if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_RC4) + s->s3->need_empty_fragments = 0; +#endif + } + } + + return ret; + +err: + SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); + return(0); + } + +void ssl3_cleanup_key_block(SSL *s) + { + if (s->s3->tmp.key_block != NULL) + { + OPENSSL_cleanse(s->s3->tmp.key_block, + s->s3->tmp.key_block_length); + OPENSSL_free(s->s3->tmp.key_block); + s->s3->tmp.key_block=NULL; + } + s->s3->tmp.key_block_length=0; + } + +int ssl3_enc(SSL *s, int send) + { + SSL3_RECORD *rec; + EVP_CIPHER_CTX *ds; + unsigned long l; + int bs,i; + const EVP_CIPHER *enc; + + if (send) + { + ds=s->enc_write_ctx; + rec= &(s->s3->wrec); + if (s->enc_write_ctx == NULL) + enc=NULL; + else + enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); + } + else + { + ds=s->enc_read_ctx; + rec= &(s->s3->rrec); + if (s->enc_read_ctx == NULL) + enc=NULL; + else + enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); + } + + if ((s->session == NULL) || (ds == NULL) || + (enc == NULL)) + { + memmove(rec->data,rec->input,rec->length); + rec->input=rec->data; + } + else + { + l=rec->length; + bs=EVP_CIPHER_block_size(ds->cipher); + + /* COMPRESS */ + + if ((bs != 1) && send) + { + i=bs-((int)l%bs); + + /* we need to add 'i-1' padding bytes */ + l+=i; + rec->length+=i; + rec->input[l-1]=(i-1); + } + + if (!send) + { + if (l == 0 || l%bs != 0) + { + SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); + ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); + return 0; + } + /* otherwise, rec->length >= bs */ + } + + EVP_Cipher(ds,rec->data,rec->input,l); + + if ((bs != 1) && !send) + { + i=rec->data[l-1]+1; + /* SSL 3.0 bounds the number of padding bytes by the block size; + * padding bytes (except the last one) are arbitrary */ + if (i > bs) + { + /* Incorrect padding. SSLerr() and ssl3_alert are done + * by caller: we don't want to reveal whether this is + * a decryption error or a MAC verification failure + * (see http://www.openssl.org/~bodo/tls-cbc.txt) */ + return -1; + } + /* now i <= bs <= rec->length */ + rec->length-=i; + } + } + return(1); + } + +void ssl3_init_finished_mac(SSL *s) + { + EVP_MD_CTX_set_flags(&(s->s3->finish_dgst1), + EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); + EVP_DigestInit_ex(&(s->s3->finish_dgst1),s->ctx->md5, NULL); + EVP_DigestInit_ex(&(s->s3->finish_dgst2),s->ctx->sha1, NULL); + } + +void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len) + { + EVP_DigestUpdate(&(s->s3->finish_dgst1),buf,len); + EVP_DigestUpdate(&(s->s3->finish_dgst2),buf,len); + } + +int ssl3_cert_verify_mac(SSL *s, EVP_MD_CTX *ctx, unsigned char *p) + { + return(ssl3_handshake_mac(s,ctx,NULL,0,p)); + } + +int ssl3_final_finish_mac(SSL *s, EVP_MD_CTX *ctx1, EVP_MD_CTX *ctx2, + const char *sender, int len, unsigned char *p) + { + int ret; + + ret=ssl3_handshake_mac(s,ctx1,sender,len,p); + p+=ret; + ret+=ssl3_handshake_mac(s,ctx2,sender,len,p); + return(ret); + } + +static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx, + const char *sender, int len, unsigned char *p) + { + unsigned int ret; + int npad,n; + unsigned int i; + unsigned char md_buf[EVP_MAX_MD_SIZE]; + EVP_MD_CTX ctx; + + EVP_MD_CTX_init(&ctx); + EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); + EVP_MD_CTX_copy_ex(&ctx,in_ctx); + + n=EVP_MD_CTX_size(&ctx); + npad=(48/n)*n; + + if (sender != NULL) + EVP_DigestUpdate(&ctx,sender,len); + EVP_DigestUpdate(&ctx,s->session->master_key, + s->session->master_key_length); + EVP_DigestUpdate(&ctx,ssl3_pad_1,npad); + EVP_DigestFinal_ex(&ctx,md_buf,&i); + + EVP_DigestInit_ex(&ctx,EVP_MD_CTX_md(&ctx), NULL); + EVP_DigestUpdate(&ctx,s->session->master_key, + s->session->master_key_length); + EVP_DigestUpdate(&ctx,ssl3_pad_2,npad); + EVP_DigestUpdate(&ctx,md_buf,i); + EVP_DigestFinal_ex(&ctx,p,&ret); + + EVP_MD_CTX_cleanup(&ctx); + + return((int)ret); + } + +int ssl3_mac(SSL *ssl, unsigned char *md, int send) + { + SSL3_RECORD *rec; + unsigned char *mac_sec,*seq; + EVP_MD_CTX md_ctx; + const EVP_MD *hash; + unsigned char *p,rec_char; + unsigned int md_size; + int npad; + + if (send) + { + rec= &(ssl->s3->wrec); + mac_sec= &(ssl->s3->write_mac_secret[0]); + seq= &(ssl->s3->write_sequence[0]); + hash=ssl->write_hash; + } + else + { + rec= &(ssl->s3->rrec); + mac_sec= &(ssl->s3->read_mac_secret[0]); + seq= &(ssl->s3->read_sequence[0]); + hash=ssl->read_hash; + } + + md_size=EVP_MD_size(hash); + npad=(48/md_size)*md_size; + + /* Chop the digest off the end :-) */ + EVP_MD_CTX_init(&md_ctx); + + EVP_DigestInit_ex( &md_ctx,hash, NULL); + EVP_DigestUpdate(&md_ctx,mac_sec,md_size); + EVP_DigestUpdate(&md_ctx,ssl3_pad_1,npad); + EVP_DigestUpdate(&md_ctx,seq,8); + rec_char=rec->type; + EVP_DigestUpdate(&md_ctx,&rec_char,1); + p=md; + s2n(rec->length,p); + EVP_DigestUpdate(&md_ctx,md,2); + EVP_DigestUpdate(&md_ctx,rec->input,rec->length); + EVP_DigestFinal_ex( &md_ctx,md,NULL); + + EVP_DigestInit_ex( &md_ctx,hash, NULL); + EVP_DigestUpdate(&md_ctx,mac_sec,md_size); + EVP_DigestUpdate(&md_ctx,ssl3_pad_2,npad); + EVP_DigestUpdate(&md_ctx,md,md_size); + EVP_DigestFinal_ex( &md_ctx,md,&md_size); + + EVP_MD_CTX_cleanup(&md_ctx); + + ssl3_record_sequence_update(seq); + return(md_size); + } + +void ssl3_record_sequence_update(unsigned char *seq) + { + int i; + + for (i=7; i>=0; i--) + { + ++seq[i]; + if (seq[i] != 0) break; + } + } + +int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, + int len) + { + static const unsigned char *salt[3]={ +#ifndef CHARSET_EBCDIC + (const unsigned char *)"A", + (const unsigned char *)"BB", + (const unsigned char *)"CCC", +#else + (const unsigned char *)"\x41", + (const unsigned char *)"\x42\x42", + (const unsigned char *)"\x43\x43\x43", +#endif + }; + unsigned char buf[EVP_MAX_MD_SIZE]; + EVP_MD_CTX ctx; + int i,ret=0; + unsigned int n; + + EVP_MD_CTX_init(&ctx); + for (i=0; i<3; i++) + { + EVP_DigestInit_ex(&ctx,s->ctx->sha1, NULL); + EVP_DigestUpdate(&ctx,salt[i],strlen((const char *)salt[i])); + EVP_DigestUpdate(&ctx,p,len); + EVP_DigestUpdate(&ctx,&(s->s3->client_random[0]), + SSL3_RANDOM_SIZE); + EVP_DigestUpdate(&ctx,&(s->s3->server_random[0]), + SSL3_RANDOM_SIZE); + EVP_DigestFinal_ex(&ctx,buf,&n); + + EVP_DigestInit_ex(&ctx,s->ctx->md5, NULL); + EVP_DigestUpdate(&ctx,p,len); + EVP_DigestUpdate(&ctx,buf,n); + EVP_DigestFinal_ex(&ctx,out,&n); + out+=n; + ret+=n; + } + EVP_MD_CTX_cleanup(&ctx); + return(ret); + } + +int ssl3_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(SSL3_AD_BAD_RECORD_MAC); + case SSL_AD_RECORD_OVERFLOW: return(SSL3_AD_BAD_RECORD_MAC); + 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(SSL3_AD_NO_CERTIFICATE); + 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(SSL3_AD_BAD_CERTIFICATE); + case SSL_AD_ACCESS_DENIED: return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_DECODE_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_DECRYPT_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_EXPORT_RESTRICTION: return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_PROTOCOL_VERSION: return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_INSUFFICIENT_SECURITY:return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_INTERNAL_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_USER_CANCELLED: return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_NO_RENEGOTIATION: return(-1); /* Don't send it :-) */ + default: return(-1); + } + } + |