X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=ssl%2Fs3_enc.c;h=010069bf28a570daf873989dec9bf76f51000192;hb=6434abbfc6ac0d5cb882844ed10fef5821039cf6;hp=72ac8b6913a0b22d4d9face3b5e43ea05bffe015;hpb=c21506ba024adb6d5655a92d61c1d3824e5dedcf;p=oweals%2Fopenssl.git diff --git a/ssl/s3_enc.c b/ssl/s3_enc.c index 72ac8b6913..010069bf28 100644 --- a/ssl/s3_enc.c +++ b/ssl/s3_enc.c @@ -56,7 +56,7 @@ * [including the GNU Public Licence.] */ /* ==================================================================== - * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. + * Copyright (c) 1998-2007 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 @@ -108,10 +108,36 @@ * Hudson (tjh@cryptsoft.com). * */ +/* ==================================================================== + * Copyright 2005 Nokia. All rights reserved. + * + * The portions of the attached software ("Contribution") is developed by + * Nokia Corporation and is licensed pursuant to the OpenSSL open source + * license. + * + * The Contribution, originally written by Mika Kousa and Pasi Eronen of + * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites + * support (see RFC 4279) to OpenSSL. + * + * No patent licenses or other rights except those expressly stated in + * the OpenSSL open source license shall be deemed granted or received + * expressly, by implication, estoppel, or otherwise. + * + * No assurances are provided by Nokia that the Contribution does not + * infringe the patent or other intellectual property rights of any third + * party or that the license provides you with all the necessary rights + * to make use of the Contribution. + * + * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN + * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA + * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY + * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR + * OTHERWISE. + */ #include -#include #include "ssl_locl.h" +#include #include static unsigned char ssl3_pad_1[48]={ @@ -139,7 +165,7 @@ static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num) EVP_MD_CTX s1; unsigned char buf[16],smd[SHA_DIGEST_LENGTH]; unsigned char c='A'; - int i,j,k; + unsigned int i,j,k; #ifdef CHARSET_EBCDIC c = os_toascii[c]; /*'A' in ASCII */ @@ -147,7 +173,7 @@ static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num) k=0; EVP_MD_CTX_init(&m5); EVP_MD_CTX_init(&s1); - for (i=0; i sizeof buf) @@ -172,7 +198,7 @@ static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num) EVP_DigestUpdate(&m5,s->session->master_key, s->session->master_key_length); EVP_DigestUpdate(&m5,smd,SHA_DIGEST_LENGTH); - if ((i+MD5_DIGEST_LENGTH) > num) + if ((int)(i+MD5_DIGEST_LENGTH) > num) { EVP_DigestFinal_ex(&m5,smd,NULL); memcpy(km,smd,(num-i)); @@ -182,7 +208,7 @@ static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num) km+=MD5_DIGEST_LENGTH; } - memset(smd,0,SHA_DIGEST_LENGTH); + OPENSSL_cleanse(smd,SHA_DIGEST_LENGTH); EVP_MD_CTX_cleanup(&m5); EVP_MD_CTX_cleanup(&s1); return 1; @@ -192,23 +218,27 @@ 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_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 exp,n,i,j,k,cl; + int is_exp,n,i,j,k,cl; int reuse_dd = 0; - exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); + 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) @@ -217,8 +247,13 @@ int ssl3_change_cipher_state(SSL *s, int which) 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; + + ssl_replace_hash(&s->read_hash,m); +#ifndef OPENSSL_NO_COMP /* COMPRESS */ if (s->expand != NULL) { @@ -239,6 +274,7 @@ int ssl3_change_cipher_state(SSL *s, int which) 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]); } @@ -248,8 +284,12 @@ int ssl3_change_cipher_state(SSL *s, int which) 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; + ssl_replace_hash(&s->write_hash,m); +#ifndef OPENSSL_NO_COMP /* COMPRESS */ if (s->compress != NULL) { @@ -265,20 +305,20 @@ int ssl3_change_cipher_state(SSL *s, int which) 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); - EVP_CIPHER_CTX_init(dd); p=s->s3->tmp.key_block; i=EVP_MD_size(m); cl=EVP_CIPHER_key_length(c); - j=exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? + 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=(exp)?5:EVP_CIPHER_key_length(c); */ + /* 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)) @@ -307,7 +347,7 @@ int ssl3_change_cipher_state(SSL *s, int which) EVP_MD_CTX_init(&md); memcpy(mac_secret,ms,i); - if (exp) + 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 :-). @@ -333,8 +373,8 @@ int ssl3_change_cipher_state(SSL *s, int which) EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); - memset(&(exp_key[0]),0,sizeof(exp_key)); - memset(&(exp_iv[0]),0,sizeof(exp_iv)); + OPENSSL_cleanse(&(exp_key[0]),sizeof(exp_key)); + OPENSSL_cleanse(&(exp_iv[0]),sizeof(exp_iv)); EVP_MD_CTX_cleanup(&md); return(1); err: @@ -355,7 +395,7 @@ int ssl3_setup_key_block(SSL *s) if (s->s3->tmp.key_block_length != 0) return(1); - if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp)) + if (!ssl_cipher_get_evp(s->session,&c,&hash,NULL,NULL,&comp)) { SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); return(0); @@ -363,7 +403,11 @@ int ssl3_setup_key_block(SSL *s) 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; @@ -385,10 +429,16 @@ int ssl3_setup_key_block(SSL *s) */ 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 != NULL) && ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_RC4)) - s->s3->need_empty_fragments = 0; + if (s->session->cipher->algorithm_enc == SSL_RC4) + s->s3->need_empty_fragments = 0; #endif + } } return ret; @@ -402,7 +452,7 @@ void ssl3_cleanup_key_block(SSL *s) { if (s->s3->tmp.key_block != NULL) { - memset(s->s3->tmp.key_block,0, + 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; @@ -468,6 +518,7 @@ int ssl3_enc(SSL *s, int send) 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); @@ -476,7 +527,7 @@ int ssl3_enc(SSL *s, int send) { i=rec->data[l-1]+1; /* SSL 3.0 bounds the number of padding bytes by the block size; - * padding bytes (except that last) are arbitrary */ + * padding bytes (except the last one) are arbitrary */ if (i > bs) { /* Incorrect padding. SSLerr() and ssl3_alert are done @@ -485,6 +536,7 @@ int ssl3_enc(SSL *s, int send) * (see http://www.openssl.org/~bodo/tls-cbc.txt) */ return -1; } + /* now i <= bs <= rec->length */ rec->length-=i; } } @@ -530,7 +582,6 @@ static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx, EVP_MD_CTX_init(&ctx); EVP_MD_CTX_copy_ex(&ctx,in_ctx); - n=EVP_MD_CTX_size(&ctx); npad=(48/n)*n; @@ -558,10 +609,10 @@ 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; + const EVP_MD_CTX *hash; unsigned char *p,rec_char; unsigned int md_size; - int npad,i; + int npad; if (send) { @@ -578,13 +629,13 @@ int ssl3_mac(SSL *ssl, unsigned char *md, int send) hash=ssl->read_hash; } - md_size=EVP_MD_size(hash); + md_size=EVP_MD_CTX_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_MD_CTX_copy_ex( &md_ctx,hash); EVP_DigestUpdate(&md_ctx,mac_sec,md_size); EVP_DigestUpdate(&md_ctx,ssl3_pad_1,npad); EVP_DigestUpdate(&md_ctx,seq,8); @@ -596,7 +647,7 @@ int ssl3_mac(SSL *ssl, unsigned char *md, int send) EVP_DigestUpdate(&md_ctx,rec->input,rec->length); EVP_DigestFinal_ex( &md_ctx,md,NULL); - EVP_DigestInit_ex( &md_ctx,hash, NULL); + EVP_MD_CTX_copy_ex( &md_ctx,hash); EVP_DigestUpdate(&md_ctx,mac_sec,md_size); EVP_DigestUpdate(&md_ctx,ssl3_pad_2,npad); EVP_DigestUpdate(&md_ctx,md,md_size); @@ -604,13 +655,19 @@ int ssl3_mac(SSL *ssl, unsigned char *md, int send) 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; } - - return(md_size); } int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, @@ -683,6 +740,12 @@ int ssl3_alert_code(int code) 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 :-) */ + case SSL_AD_UNSUPPORTED_EXTENSION: return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_UNRECOGNIZED_NAME: return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(SSL3_AD_HANDSHAKE_FAILURE); + case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY); default: return(-1); } }