-static void ssl3_generate_key_block(s,km,num)
-SSL *s;
-unsigned char *km;
-int num;
- {
- MD5_CTX m5;
- SHA_CTX s1;
- unsigned char buf[8],smd[SHA_DIGEST_LENGTH];
- unsigned char c='A';
- int i,j,k;
-
- k=0;
- for (i=0; i<num; i+=MD5_DIGEST_LENGTH)
- {
- k++;
- for (j=0; j<k; j++)
- buf[j]=c;
- c++;
- SHA1_Init( &s1);
- SHA1_Update(&s1,buf,k);
- SHA1_Update(&s1,s->session->master_key,
- s->session->master_key_length);
- SHA1_Update(&s1,s->s3->server_random,SSL3_RANDOM_SIZE);
- SHA1_Update(&s1,s->s3->client_random,SSL3_RANDOM_SIZE);
- SHA1_Final( smd,&s1);
-
- MD5_Init( &m5);
- MD5_Update(&m5,s->session->master_key,
- s->session->master_key_length);
- MD5_Update(&m5,smd,SHA_DIGEST_LENGTH);
- if ((i+MD5_DIGEST_LENGTH) > num)
- {
- MD5_Final(smd,&m5);
- memcpy(km,smd,(num-i));
- }
- else
- MD5_Final(km,&m5);
-
- km+=MD5_DIGEST_LENGTH;
- }
- memset(smd,0,SHA_DIGEST_LENGTH);
- }
-
-int ssl3_change_cipher_state(s,which)
-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 *ms,*key,*iv,*er1,*er2;
- EVP_CIPHER_CTX *dd;
- EVP_CIPHER *c;
- COMP_METHOD *comp;
- EVP_MD *m;
- MD5_CTX md;
- int exp,n,i,j,k,cl;
-
- exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
- c=s->s3->tmp.new_sym_enc;
- m=s->s3->tmp.new_hash;
- if (s->s3->tmp.new_compression == NULL)
- comp=NULL;
- else
- comp=s->s3->tmp.new_compression->method;
- 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;
- /* 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 *)
- Malloc(SSL3_RT_MAX_PLAIN_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;
- /* 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;
- }
- }
- 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);
- cl=EVP_CIPHER_key_length(c);
- j=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); */
- 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,SSL_R_INTERNAL_ERROR);
- goto err2;
- }
-
- memcpy(mac_secret,ms,i);
- if (exp)
- {
- /* In here I set both the read and write key/iv to the
- * same value since only the correct one will be used :-).
- */
- MD5_Init(&md);
- MD5_Update(&md,key,j);
- MD5_Update(&md,er1,SSL3_RANDOM_SIZE);
- MD5_Update(&md,er2,SSL3_RANDOM_SIZE);
- MD5_Final(&(exp_key[0]),&md);
- key= &(exp_key[0]);
-
- if (k > 0)
- {
- MD5_Init(&md);
- MD5_Update(&md,er1,SSL3_RANDOM_SIZE);
- MD5_Update(&md,er2,SSL3_RANDOM_SIZE);
- MD5_Final(&(exp_iv[0]),&md);
- iv= &(exp_iv[0]);
- }
- }
-
- s->session->key_arg_length=0;
-
- EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE));
-
- memset(&(exp_key[0]),0,sizeof(exp_key));
- memset(&(exp_iv[0]),0,sizeof(exp_iv));
- return(1);
-err:
- SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
-err2:
- return(0);
- }
-
-int ssl3_setup_key_block(s)
-SSL *s;
- {
- unsigned char *p;
- EVP_CIPHER *c;
- EVP_MD *hash;
- int num;
- 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;
- s->s3->tmp.new_compression=comp;
-
- num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
- num*=2;
-
- ssl3_cleanup_key_block(s);
-
- if ((p=(unsigned char *)Malloc(num)) == NULL)
- goto err;
-
- s->s3->tmp.key_block_length=num;
- s->s3->tmp.key_block=p;
-
- ssl3_generate_key_block(s,p,num);
-
- return(1);
-err:
- SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
- return(0);
- }
-
-void ssl3_cleanup_key_block(s)
-SSL *s;
- {
- if (s->s3->tmp.key_block != NULL)
- {
- memset(s->s3->tmp.key_block,0,
- s->s3->tmp.key_block_length);
- Free(s->s3->tmp.key_block);
- s->s3->tmp.key_block=NULL;
- }
- s->s3->tmp.key_block_length=0;
- }
-
-int ssl3_enc(s,send)
-SSL *s;
-int send;
- {
- SSL3_RECORD *rec;
- EVP_CIPHER_CTX *ds;
- unsigned long l;
- int bs,i;
- 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))
- {
- memcpy(rec->data,rec->input,rec->length);
- rec->input=rec->data;
- }
- else
- {
- l=rec->length;
- bs=EVP_CIPHER_block_size(ds->cipher);
-
- /* COMPRESS */
-
- /* This should be using (bs-1) and bs instead of 7 and 8 */
- 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);
- }
-
- EVP_Cipher(ds,rec->data,rec->input,l);
-
- if ((bs != 1) && !send)
- {
- i=rec->data[l-1]+1;
- if (i > bs)
- {
- SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
- ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPT_ERROR);
- return(0);
- }
- rec->length-=i;
- }
- }
- return(1);
- }
-
-void ssl3_init_finished_mac(s)
-SSL *s;
- {
- EVP_DigestInit(&(s->s3->finish_dgst1),s->ctx->md5);
- EVP_DigestInit(&(s->s3->finish_dgst2),s->ctx->sha1);
- }
-
-void ssl3_finish_mac(s,buf,len)
-SSL *s;
-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(s,ctx,p)
-SSL *s;
-EVP_MD_CTX *ctx;
-unsigned char *p;
- {
- return(ssl3_handshake_mac(s,ctx,NULL,0,p));
- }
-
-int ssl3_final_finish_mac(s,ctx1,ctx2,sender,len,p)
-SSL *s;
-EVP_MD_CTX *ctx1,*ctx2;
-unsigned 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(s,in_ctx,sender,len,p)
-SSL *s;
-EVP_MD_CTX *in_ctx;
-unsigned 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_copy(&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(&ctx,md_buf,&i);
-
- EVP_DigestInit(&ctx,EVP_MD_CTX_type(&ctx));
- 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(&ctx,p,&ret);
-
- memset(&ctx,0,sizeof(EVP_MD_CTX));
-
- return((int)ret);
- }
-
-int ssl3_mac(ssl,md,send)
-SSL *ssl;
-unsigned char *md;
-int send;
- {
- SSL3_RECORD *rec;
- unsigned char *mac_sec,*seq;
- EVP_MD_CTX md_ctx;
- EVP_MD *hash;
- unsigned char *p,rec_char;
- unsigned int md_size;
- int npad,i;
-
- 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_DigestInit( &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);
- 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( &md_ctx,md,NULL);
-
- EVP_DigestInit( &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);
- EVP_DigestFinal( &md_ctx,md,&md_size);
-
- for (i=7; i>=0; i--)
- if (++seq[i]) break;
-
- return(md_size);
- }
-
-int ssl3_generate_master_secret(s,out,p,len)
-SSL *s;
-unsigned char *out;
-unsigned char *p;
-int len;
- {
- static unsigned char *salt[3]={
- (unsigned char *)"A",
- (unsigned char *)"BB",
- (unsigned char *)"CCC",
- };
- unsigned char buf[EVP_MAX_MD_SIZE];
- EVP_MD_CTX ctx;
- int i,ret=0;
- unsigned int n;
-
- for (i=0; i<3; i++)
- {
- EVP_DigestInit(&ctx,s->ctx->sha1);
- EVP_DigestUpdate(&ctx,salt[i],strlen((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(&ctx,buf,&n);
-
- EVP_DigestInit(&ctx,s->ctx->md5);
- EVP_DigestUpdate(&ctx,p,len);
- EVP_DigestUpdate(&ctx,buf,n);
- EVP_DigestFinal(&ctx,out,&n);
- out+=n;
- ret+=n;
- }
- return(ret);
- }
-
-int ssl3_alert_code(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_RESTRICION: 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_CANCLED: return(SSL3_AD_HANDSHAKE_FAILURE);
- case SSL_AD_NO_RENEGOTIATION: return(-1); /* Don't send it :-) */
- default: return(-1);
- }
- }