-static void tls1_P_hash(md,sec,sec_len,seed,seed_len,out,olen)
-EVP_MD *md;
-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[HMAC_MAX_MD_CBLOCK];
- unsigned int A1_len;
-
- chunk=EVP_MD_size(md);
-
- HMAC_Init(&ctx,sec,sec_len,md);
- HMAC_Update(&ctx,seed,seed_len);
- HMAC_Final(&ctx,A1,&A1_len);
-
- n=0;
- for (;;)
- {
- HMAC_Init(&ctx,NULL,0,NULL); /* re-init */
- HMAC_Update(&ctx,A1,A1_len);
- memcpy(&ctx_tmp,&ctx,sizeof(ctx)); /* Copy for A2 */ /* not needed for last one */
- 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_cleanup(&ctx);
- HMAC_cleanup(&ctx_tmp);
- memset(A1,0,sizeof(A1));
- }
-
-static void tls1_PRF(md5,sha1,label,label_len,sec,slen,out1,out2,olen)
-EVP_MD *md5;
-EVP_MD *sha1;
-unsigned char *label;
-int label_len;
-unsigned char *sec;
-int slen;
-unsigned char *out1;
-unsigned char *out2;
-int olen;
- {
- int len,i;
- 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(s,km,tmp,num)
-SSL *s;
-unsigned char *km,*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);
- }
-
-int tls1_change_cipher_state(s,which)
-SSL *s;
-int which;
- {
- 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;
- EVP_CIPHER *c;
- COMP_METHOD *comp;
- EVP_MD *m;
- int exp,n,i,j,k,exp_label_len;
-
- exp=(s->s3->tmp.new_cipher->algorithms & SSL_EXPORT)?1:0;
- c=s->s3->tmp.new_sym_enc;
- m=s->s3->tmp.new_hash;
- comp=s->s3->tmp.new_compression;
- key_block=s->s3->tmp.key_block;
-
- if (which & SSL3_CC_READ)
- {
- if ((s->enc_read_ctx == NULL) &&
- ((s->enc_read_ctx=(EVP_CIPHER_CTX *)
- Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
- goto err;
- dd= s->enc_read_ctx;
- s->read_hash=m;
- 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_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
- goto err2;
- }
- s->s3->rrec.comp=(unsigned char *)
- Malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
- if (s->s3->rrec.comp == NULL)
- goto err;
- }
- memset(&(s->s3->read_sequence[0]),0,8);
- mac_secret= &(s->s3->read_mac_secret[0]);
- }
- else
- {
- if ((s->enc_write_ctx == NULL) &&
- ((s->enc_write_ctx=(EVP_CIPHER_CTX *)
- Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
- goto err;
- dd= s->enc_write_ctx;
- s->write_hash=m;
- 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_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
- goto err2;
- }
- }
- memset(&(s->s3->write_sequence[0]),0,8);
- mac_secret= &(s->s3->write_mac_secret[0]);
- }
-
- EVP_CIPHER_CTX_init(dd);
-
- p=s->s3->tmp.key_block;
- i=EVP_MD_size(m);
- 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,SSL_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'); }