-int ssl3_enc(SSL *s, int send)
- {
- SSL3_RECORD *rec;
- EVP_CIPHER_CTX *ds;
- unsigned long l;
- int bs,i,mac_size=0;
- 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;
- /* the last of these zero bytes will be overwritten
- * with the padding length. */
- memset(&rec->input[rec->length], 0, 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 (EVP_MD_CTX_md(s->read_hash) != NULL)
- mac_size = EVP_MD_CTX_size(s->read_hash);
- if ((bs != 1) && !send)
- return ssl3_cbc_remove_padding(s, rec, bs, mac_size);
- }
- return(1);
- }
-
-void ssl3_init_finished_mac(SSL *s)
- {
- if (s->s3->handshake_buffer) BIO_free(s->s3->handshake_buffer);
- if (s->s3->handshake_dgst) ssl3_free_digest_list(s);
- s->s3->handshake_buffer=BIO_new(BIO_s_mem());
- (void)BIO_set_close(s->s3->handshake_buffer,BIO_CLOSE);
- }
-
-void ssl3_free_digest_list(SSL *s)
- {
- int i;
- if (!s->s3->handshake_dgst) return;
- for (i=0;i<SSL_MAX_DIGEST;i++)
- {
- if (s->s3->handshake_dgst[i])
- EVP_MD_CTX_destroy(s->s3->handshake_dgst[i]);
- }
- OPENSSL_free(s->s3->handshake_dgst);
- s->s3->handshake_dgst=NULL;
- }
-
-
-
-void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len)
- {
- if (s->s3->handshake_buffer && !(s->s3->flags & TLS1_FLAGS_KEEP_HANDSHAKE))
- {
- BIO_write (s->s3->handshake_buffer,(void *)buf,len);
- }
- else
- {
- int i;
- for (i=0;i< SSL_MAX_DIGEST;i++)
- {
- if (s->s3->handshake_dgst[i]!= NULL)
- EVP_DigestUpdate(s->s3->handshake_dgst[i],buf,len);
- }
- }
- }
-
-int ssl3_digest_cached_records(SSL *s)
- {
- int i;
- long mask;
- const EVP_MD *md;
- long hdatalen;
- void *hdata;
-
- /* Allocate handshake_dgst array */
- ssl3_free_digest_list(s);
- s->s3->handshake_dgst = OPENSSL_malloc(SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *));
- memset(s->s3->handshake_dgst,0,SSL_MAX_DIGEST *sizeof(EVP_MD_CTX *));
- hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,&hdata);
- if (hdatalen <= 0)
- {
- SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, SSL_R_BAD_HANDSHAKE_LENGTH);
- return 0;
- }
-
- /* Loop through bitso of algorithm2 field and create MD_CTX-es */
- for (i=0;ssl_get_handshake_digest(i,&mask,&md); i++)
- {
- if ((mask & ssl_get_algorithm2(s)) && md)
- {
- s->s3->handshake_dgst[i]=EVP_MD_CTX_create();
-#ifdef OPENSSL_FIPS
- if (EVP_MD_nid(md) == NID_md5)
- {
- EVP_MD_CTX_set_flags(s->s3->handshake_dgst[i],
- EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
- }
-#endif
- EVP_DigestInit_ex(s->s3->handshake_dgst[i],md,NULL);
- EVP_DigestUpdate(s->s3->handshake_dgst[i],hdata,hdatalen);
- }
- else
- {
- s->s3->handshake_dgst[i]=NULL;
- }
- }
- if (!(s->s3->flags & TLS1_FLAGS_KEEP_HANDSHAKE))
- {
- /* Free handshake_buffer BIO */
- BIO_free(s->s3->handshake_buffer);
- s->s3->handshake_buffer = NULL;
- }
-
- return 1;
- }
-
-int ssl3_cert_verify_mac(SSL *s, int md_nid, unsigned char *p)
- {
- return(ssl3_handshake_mac(s,md_nid,NULL,0,p));
- }
-int ssl3_final_finish_mac(SSL *s,
- const char *sender, int len, unsigned char *p)
- {
- int ret;
- ret=ssl3_handshake_mac(s,NID_md5,sender,len,p);
- p+=ret;
- ret+=ssl3_handshake_mac(s,NID_sha1,sender,len,p);
- return(ret);
- }
-static int ssl3_handshake_mac(SSL *s, int md_nid,
- 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,*d=NULL;
-
- if (s->s3->handshake_buffer)
- if (!ssl3_digest_cached_records(s))
- return 0;
-
- /* Search for digest of specified type in the handshake_dgst
- * array*/
- for (i=0;i<SSL_MAX_DIGEST;i++)
- {
- if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
- {
- d=s->s3->handshake_dgst[i];
- break;
- }
- }
- if (!d) {
- SSLerr(SSL_F_SSL3_HANDSHAKE_MAC,SSL_R_NO_REQUIRED_DIGEST);
- return 0;
- }
- EVP_MD_CTX_init(&ctx);
- EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
- EVP_MD_CTX_copy_ex(&ctx,d);
- n=EVP_MD_CTX_size(&ctx);
- if (n < 0)
- return 0;
-
- 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 n_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_CTX *hash;
- unsigned char *p,rec_char;
- size_t md_size;
- int npad;
- int t;
-
- 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;
- }
-
- t=EVP_MD_CTX_size(hash);
- if (t < 0)
- return -1;
- md_size=t;
- npad=(48/md_size)*md_size;
-
- if (!send &&
- EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
- ssl3_cbc_record_digest_supported(hash))
- {
- /* This is a CBC-encrypted record. We must avoid leaking any
- * timing-side channel information about how many blocks of
- * data we are hashing because that gives an attacker a
- * timing-oracle. */
-
- /* npad is, at most, 48 bytes and that's with MD5:
- * 16 + 48 + 8 (sequence bytes) + 1 + 2 = 75.
- *
- * With SHA-1 (the largest hash speced for SSLv3) the hash size
- * goes up 4, but npad goes down by 8, resulting in a smaller
- * total size. */
- unsigned char header[75];
- unsigned j = 0;
- memcpy(header+j, mac_sec, md_size);
- j += md_size;
- memcpy(header+j, ssl3_pad_1, npad);
- j += npad;
- memcpy(header+j, seq, 8);
- j += 8;
- header[j++] = rec->type;
- header[j++] = rec->length >> 8;
- header[j++] = rec->length & 0xff;
-
- ssl3_cbc_digest_record(
- hash,
- md, &md_size,
- header, rec->input,
- rec->length + md_size, rec->orig_len,
- mac_sec, md_size,
- 1 /* is SSLv3 */);
- }
- else
- {
- unsigned int md_size_u;
- /* Chop the digest off the end :-) */
- EVP_MD_CTX_init(&md_ctx);
-
- 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);
- 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_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);
- EVP_DigestFinal_ex( &md_ctx,md,&md_size_u);
- md_size = md_size_u;
-
- 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;
- }
- }
+
+void ssl3_free_digest_list(SSL *s)
+{
+ BIO_free(s->s3->handshake_buffer);
+ s->s3->handshake_buffer = NULL;
+ EVP_MD_CTX_free(s->s3->handshake_dgst);
+ s->s3->handshake_dgst = NULL;
+}
+
+int ssl3_finish_mac(SSL *s, const unsigned char *buf, int len)
+{
+ if (s->s3->handshake_dgst == NULL)
+ /* Note: this writes to a memory BIO so a failure is a fatal error */
+ return BIO_write(s->s3->handshake_buffer, (void *)buf, len) == len;
+ else
+ return EVP_DigestUpdate(s->s3->handshake_dgst, buf, len);
+}
+
+int ssl3_digest_cached_records(SSL *s, int keep)
+{
+ const EVP_MD *md;
+ long hdatalen;
+ void *hdata;
+
+ if (s->s3->handshake_dgst == NULL) {
+ hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
+ if (hdatalen <= 0) {
+ SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS,
+ SSL_R_BAD_HANDSHAKE_LENGTH);
+ return 0;
+ }
+
+ s->s3->handshake_dgst = EVP_MD_CTX_new();
+ if (s->s3->handshake_dgst == NULL) {
+ SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ md = ssl_handshake_md(s);
+ if (md == NULL || !EVP_DigestInit_ex(s->s3->handshake_dgst, md, NULL)
+ || !EVP_DigestUpdate(s->s3->handshake_dgst, hdata, hdatalen)) {
+ SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ }
+ if (keep == 0) {
+ BIO_free(s->s3->handshake_buffer);
+ s->s3->handshake_buffer = NULL;
+ }
+
+ return 1;
+}
+
+int ssl3_final_finish_mac(SSL *s, const char *sender, int len, unsigned char *p)
+{
+ int ret;
+ EVP_MD_CTX *ctx = NULL;
+
+ if (!ssl3_digest_cached_records(s, 0))
+ return 0;
+
+ if (EVP_MD_CTX_type(s->s3->handshake_dgst) != NID_md5_sha1) {
+ SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, SSL_R_NO_REQUIRED_DIGEST);
+ return 0;
+ }
+
+ ctx = EVP_MD_CTX_new();
+ if (ctx == NULL) {
+ SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ if (!EVP_MD_CTX_copy_ex(ctx, s->s3->handshake_dgst)) {
+ SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ ret = EVP_MD_CTX_size(ctx);
+ if (ret < 0) {
+ EVP_MD_CTX_reset(ctx);
+ return 0;
+ }
+
+ if ((sender != NULL && EVP_DigestUpdate(ctx, sender, len) <= 0)
+ || EVP_MD_CTX_ctrl(ctx, EVP_CTRL_SSL3_MASTER_SECRET,
+ s->session->master_key_length,
+ s->session->master_key) <= 0
+ || EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
+ SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_INTERNAL_ERROR);
+ ret = 0;
+ }
+
+ EVP_MD_CTX_free(ctx);
+
+ return ret;
+}