diff options
Diffstat (limited to 'openssl/ssl/t1_enc.c')
| -rw-r--r-- | openssl/ssl/t1_enc.c | 872 |
1 files changed, 872 insertions, 0 deletions
diff --git a/openssl/ssl/t1_enc.c b/openssl/ssl/t1_enc.c new file mode 100644 index 000000000..7cb3e29a4 --- /dev/null +++ b/openssl/ssl/t1_enc.c @@ -0,0 +1,872 @@ +/* ssl/t1_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" +#ifndef OPENSSL_NO_COMP +#include <openssl/comp.h> +#endif +#include <openssl/evp.h> +#include <openssl/hmac.h> +#include <openssl/md5.h> +#ifdef KSSL_DEBUG +#include <openssl/des.h> +#endif + +static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec, + int sec_len, unsigned char *seed, int seed_len, + unsigned char *out, int olen) + { + int chunk,n; + unsigned int j; + HMAC_CTX ctx; + HMAC_CTX ctx_tmp; + unsigned char A1[EVP_MAX_MD_SIZE]; + unsigned int A1_len; + + chunk=EVP_MD_size(md); + + HMAC_CTX_init(&ctx); + HMAC_CTX_init(&ctx_tmp); + HMAC_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); + HMAC_CTX_set_flags(&ctx_tmp, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); + HMAC_Init_ex(&ctx,sec,sec_len,md, NULL); + HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL); + HMAC_Update(&ctx,seed,seed_len); + HMAC_Final(&ctx,A1,&A1_len); + + n=0; + for (;;) + { + HMAC_Init_ex(&ctx,NULL,0,NULL,NULL); /* re-init */ + HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL); /* re-init */ + HMAC_Update(&ctx,A1,A1_len); + HMAC_Update(&ctx_tmp,A1,A1_len); + HMAC_Update(&ctx,seed,seed_len); + + if (olen > chunk) + { + HMAC_Final(&ctx,out,&j); + out+=j; + olen-=j; + HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */ + } + else /* last one */ + { + HMAC_Final(&ctx,A1,&A1_len); + memcpy(out,A1,olen); + break; + } + } + HMAC_CTX_cleanup(&ctx); + HMAC_CTX_cleanup(&ctx_tmp); + OPENSSL_cleanse(A1,sizeof(A1)); + } + +static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1, + unsigned char *label, int label_len, + const unsigned char *sec, int slen, unsigned char *out1, + unsigned char *out2, int olen) + { + int len,i; + const unsigned char *S1,*S2; + + len=slen/2; + S1=sec; + S2= &(sec[len]); + len+=(slen&1); /* add for odd, make longer */ + + + tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen); + tls1_P_hash(sha1,S2,len,label,label_len,out2,olen); + + for (i=0; i<olen; i++) + out1[i]^=out2[i]; + } + +static void tls1_generate_key_block(SSL *s, unsigned char *km, + unsigned char *tmp, int num) + { + unsigned char *p; + unsigned char buf[SSL3_RANDOM_SIZE*2+ + TLS_MD_MAX_CONST_SIZE]; + p=buf; + + memcpy(p,TLS_MD_KEY_EXPANSION_CONST, + TLS_MD_KEY_EXPANSION_CONST_SIZE); + p+=TLS_MD_KEY_EXPANSION_CONST_SIZE; + memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); + p+=SSL3_RANDOM_SIZE; + memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); + p+=SSL3_RANDOM_SIZE; + + tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf), + s->session->master_key,s->session->master_key_length, + km,tmp,num); +#ifdef KSSL_DEBUG + printf("tls1_generate_key_block() ==> %d byte master_key =\n\t", + s->session->master_key_length); + { + int i; + for (i=0; i < s->session->master_key_length; i++) + { + printf("%02X", s->session->master_key[i]); + } + printf("\n"); } +#endif /* KSSL_DEBUG */ + } + +int tls1_change_cipher_state(SSL *s, int which) + { + static const unsigned char empty[]=""; + unsigned char *p,*key_block,*mac_secret; + unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+ + SSL3_RANDOM_SIZE*2]; + unsigned char tmp1[EVP_MAX_KEY_LENGTH]; + unsigned char tmp2[EVP_MAX_KEY_LENGTH]; + unsigned char iv1[EVP_MAX_IV_LENGTH*2]; + unsigned char iv2[EVP_MAX_IV_LENGTH*2]; + unsigned char *ms,*key,*iv,*er1,*er2; + int client_write; + EVP_CIPHER_CTX *dd; + const EVP_CIPHER *c; +#ifndef OPENSSL_NO_COMP + const SSL_COMP *comp; +#endif + const EVP_MD *m; + int is_export,n,i,j,k,exp_label_len,cl; + int reuse_dd = 0; + + is_export=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 + comp=s->s3->tmp.new_compression; +#endif + key_block=s->s3->tmp.key_block; + +#ifdef KSSL_DEBUG + printf("tls1_change_cipher_state(which= %d) w/\n", which); + printf("\talg= %ld, comp= %p\n", s->s3->tmp.new_cipher->algorithms, + (void *)comp); + printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", (void *)c); + printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n", + c->nid,c->block_size,c->key_len,c->iv_len); + printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length); + { + int ki; + for (ki=0; ki<s->s3->tmp.key_block_length; ki++) + printf("%02x", key_block[ki]); printf("\n"); + } +#endif /* KSSL_DEBUG */ + + 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 + if (s->expand != NULL) + { + COMP_CTX_free(s->expand); + s->expand=NULL; + } + if (comp != NULL) + { + s->expand=COMP_CTX_new(comp->method); + if (s->expand == NULL) + { + SSLerr(SSL_F_TLS1_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_ENCRYPTED_LENGTH); + if (s->s3->rrec.comp == NULL) + goto err; + } +#endif + /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ + if (s->version != DTLS1_VERSION) + 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 + if (s->compress != NULL) + { + COMP_CTX_free(s->compress); + s->compress=NULL; + } + if (comp != NULL) + { + s->compress=COMP_CTX_new(comp->method); + if (s->compress == NULL) + { + SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); + goto err2; + } + } +#endif + /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ + if (s->version != DTLS1_VERSION) + 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_export ? (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); */ + k=EVP_CIPHER_iv_length(c); + er1= &(s->s3->client_random[0]); + er2= &(s->s3->server_random[0]); + 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; + exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; + exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; + client_write=1; + } + else + { + n=i; + ms= &(p[ n]); n+=i+j; + key= &(p[ n]); n+=j+k; + iv= &(p[ n]); n+=k; + exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; + exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; + client_write=0; + } + + if (n > s->s3->tmp.key_block_length) + { + SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR); + goto err2; + } + + memcpy(mac_secret,ms,i); +#ifdef TLS_DEBUG +printf("which = %04X\nmac key=",which); +{ int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } +#endif + if (is_export) + { + /* In here I set both the read and write key/iv to the + * same value since only the correct one will be used :-). + */ + p=buf; + memcpy(p,exp_label,exp_label_len); + p+=exp_label_len; + memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); + p+=SSL3_RANDOM_SIZE; + memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); + p+=SSL3_RANDOM_SIZE; + tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j, + tmp1,tmp2,EVP_CIPHER_key_length(c)); + key=tmp1; + + if (k > 0) + { + p=buf; + memcpy(p,TLS_MD_IV_BLOCK_CONST, + TLS_MD_IV_BLOCK_CONST_SIZE); + p+=TLS_MD_IV_BLOCK_CONST_SIZE; + memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); + p+=SSL3_RANDOM_SIZE; + memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); + p+=SSL3_RANDOM_SIZE; + tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,empty,0, + iv1,iv2,k*2); + if (client_write) + iv=iv1; + else + iv= &(iv1[k]); + } + } + + s->session->key_arg_length=0; +#ifdef KSSL_DEBUG + { + int ki; + printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n"); + printf("\tkey= "); + for (ki=0; ki<c->key_len; ki++) printf("%02x", key[ki]); + printf("\n"); + printf("\t iv= "); + for (ki=0; ki<c->iv_len; ki++) printf("%02x", iv[ki]); + printf("\n"); + } +#endif /* KSSL_DEBUG */ + + EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); +#ifdef TLS_DEBUG +printf("which = %04X\nkey=",which); +{ int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } +printf("\niv="); +{ int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } +printf("\n"); +#endif + + OPENSSL_cleanse(tmp1,sizeof(tmp1)); + OPENSSL_cleanse(tmp2,sizeof(tmp1)); + OPENSSL_cleanse(iv1,sizeof(iv1)); + OPENSSL_cleanse(iv2,sizeof(iv2)); + return(1); +err: + SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); +err2: + return(0); + } + +int tls1_setup_key_block(SSL *s) + { + unsigned char *p1,*p2; + const EVP_CIPHER *c; + const EVP_MD *hash; + int num; + SSL_COMP *comp; + +#ifdef KSSL_DEBUG + printf ("tls1_setup_key_block()\n"); +#endif /* KSSL_DEBUG */ + + if (s->s3->tmp.key_block_length != 0) + return(1); + + if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp)) + { + SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); + return(0); + } + + s->s3->tmp.new_sym_enc=c; + s->s3->tmp.new_hash=hash; + + num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c); + num*=2; + + ssl3_cleanup_key_block(s); + + if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL) + goto err; + if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL) + goto err; + + s->s3->tmp.key_block_length=num; + s->s3->tmp.key_block=p1; + + +#ifdef TLS_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("pre-master\n"); +{ int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } +#endif + tls1_generate_key_block(s,p1,p2,num); + OPENSSL_cleanse(p2,num); + OPENSSL_free(p2); +#ifdef TLS_DEBUG +printf("\nkey block\n"); +{ int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } +#endif + + 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(1); +err: + SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); + return(0); + } + +int tls1_enc(SSL *s, int send) + { + SSL3_RECORD *rec; + EVP_CIPHER_CTX *ds; + unsigned long l; + int bs,i,ii,j,k,n=0; + const EVP_CIPHER *enc; + + if (send) + { + if (s->write_hash != NULL) + n=EVP_MD_size(s->write_hash); + 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 + { + if (s->read_hash != NULL) + n=EVP_MD_size(s->read_hash); + 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); + } + +#ifdef KSSL_DEBUG + printf("tls1_enc(%d)\n", send); +#endif /* KSSL_DEBUG */ + + 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); + + if ((bs != 1) && send) + { + i=bs-((int)l%bs); + + /* Add weird padding of upto 256 bytes */ + + /* we need to add 'i' padding bytes of value j */ + j=i-1; + if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) + { + if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) + j++; + } + for (k=(int)l; k<(int)(l+i); k++) + rec->input[k]=j; + l+=i; + rec->length+=i; + } + +#ifdef KSSL_DEBUG + { + unsigned long ui; + printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n", + (void *)ds,rec->data,rec->input,l); + printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%ld %ld], %d iv_len\n", + ds->buf_len, ds->cipher->key_len, + (unsigned long)DES_KEY_SZ, + (unsigned long)DES_SCHEDULE_SZ, + ds->cipher->iv_len); + printf("\t\tIV: "); + for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]); + printf("\n"); + printf("\trec->input="); + for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]); + printf("\n"); + } +#endif /* KSSL_DEBUG */ + + if (!send) + { + if (l == 0 || l%bs != 0) + { + SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); + ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); + return 0; + } + } + + EVP_Cipher(ds,rec->data,rec->input,l); + +#ifdef KSSL_DEBUG + { + unsigned long ki; + printf("\trec->data="); + for (ki=0; ki<l; i++) + printf(" %02x", rec->data[ki]); printf("\n"); + } +#endif /* KSSL_DEBUG */ + + if ((bs != 1) && !send) + { + ii=i=rec->data[l-1]; /* padding_length */ + i++; + /* NB: if compression is in operation the first packet + * may not be of even length so the padding bug check + * cannot be performed. This bug workaround has been + * around since SSLeay so hopefully it is either fixed + * now or no buggy implementation supports compression + * [steve] + */ + if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) + && !s->expand) + { + /* First packet is even in size, so check */ + if ((memcmp(s->s3->read_sequence, + "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) + s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; + if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) + i--; + } + /* TLS 1.0 does not bound the number of padding bytes by the block size. + * All of them must have value 'padding_length'. */ + if (i > (int)rec->length) + { + /* 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; + } + for (j=(int)(l-i); j<(int)l; j++) + { + if (rec->data[j] != ii) + { + /* Incorrect padding */ + return -1; + } + } + rec->length-=i; + } + } + return(1); + } + +int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out) + { + unsigned int ret; + EVP_MD_CTX ctx; + + EVP_MD_CTX_init(&ctx); + EVP_MD_CTX_copy_ex(&ctx,in_ctx); + EVP_DigestFinal_ex(&ctx,out,&ret); + EVP_MD_CTX_cleanup(&ctx); + return((int)ret); + } + +int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx, + const char *str, int slen, unsigned char *out) + { + unsigned int i; + EVP_MD_CTX ctx; + unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; + unsigned char *q,buf2[12]; + + q=buf; + memcpy(q,str,slen); + q+=slen; + + EVP_MD_CTX_init(&ctx); + EVP_MD_CTX_copy_ex(&ctx,in1_ctx); + EVP_DigestFinal_ex(&ctx,q,&i); + q+=i; + EVP_MD_CTX_copy_ex(&ctx,in2_ctx); + EVP_DigestFinal_ex(&ctx,q,&i); + q+=i; + + tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf), + s->session->master_key,s->session->master_key_length, + out,buf2,sizeof buf2); + EVP_MD_CTX_cleanup(&ctx); + + return sizeof buf2; + } + +int tls1_mac(SSL *ssl, unsigned char *md, int send) + { + SSL3_RECORD *rec; + unsigned char *mac_sec,*seq; + const EVP_MD *hash; + unsigned int md_size; + int i; + HMAC_CTX hmac; + unsigned char buf[5]; + + 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); + + buf[0]=rec->type; + if (ssl->version == DTLS1_VERSION && ssl->client_version == DTLS1_BAD_VER) + { + buf[1]=TLS1_VERSION_MAJOR; + buf[2]=TLS1_VERSION_MINOR; + } + else { + buf[1]=(unsigned char)(ssl->version>>8); + buf[2]=(unsigned char)(ssl->version); + } + + buf[3]=rec->length>>8; + buf[4]=rec->length&0xff; + + /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ + HMAC_CTX_init(&hmac); + HMAC_Init_ex(&hmac,mac_sec,EVP_MD_size(hash),hash,NULL); + + if (ssl->version == DTLS1_VERSION && ssl->client_version != DTLS1_BAD_VER) + { + unsigned char dtlsseq[8],*p=dtlsseq; + + s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p); + memcpy (p,&seq[2],6); + + HMAC_Update(&hmac,dtlsseq,8); + } + else + HMAC_Update(&hmac,seq,8); + + HMAC_Update(&hmac,buf,5); + HMAC_Update(&hmac,rec->input,rec->length); + HMAC_Final(&hmac,md,&md_size); + HMAC_CTX_cleanup(&hmac); + +#ifdef TLS_DEBUG +printf("sec="); +{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } +printf("seq="); +{int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); } +printf("buf="); +{int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); } +printf("rec="); +{unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } +#endif + + if ( SSL_version(ssl) != DTLS1_VERSION) + { + for (i=7; i>=0; i--) + { + ++seq[i]; + if (seq[i] != 0) break; + } + } + +#ifdef TLS_DEBUG +{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } +#endif + return(md_size); + } + +int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, + int len) + { + unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE]; + unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; + +#ifdef KSSL_DEBUG + printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", (void *)s,out, p,len); +#endif /* KSSL_DEBUG */ + + /* Setup the stuff to munge */ + memcpy(buf,TLS_MD_MASTER_SECRET_CONST, + TLS_MD_MASTER_SECRET_CONST_SIZE); + memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]), + s->s3->client_random,SSL3_RANDOM_SIZE); + memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]), + s->s3->server_random,SSL3_RANDOM_SIZE); + tls1_PRF(s->ctx->md5,s->ctx->sha1, + buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len, + s->session->master_key,buff,sizeof buff); +#ifdef KSSL_DEBUG + printf ("tls1_generate_master_secret() complete\n"); +#endif /* KSSL_DEBUG */ + return(SSL3_MASTER_SECRET_SIZE); + } + +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); +#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE + case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return + (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); +#endif + default: return(-1); + } + } + |