diff options
Diffstat (limited to 'openssl/ssl/s3_srvr.c')
| -rw-r--r-- | openssl/ssl/s3_srvr.c | 90 |
1 files changed, 58 insertions, 32 deletions
diff --git a/openssl/ssl/s3_srvr.c b/openssl/ssl/s3_srvr.c index 2c6fb282b..c016139b1 100644 --- a/openssl/ssl/s3_srvr.c +++ b/openssl/ssl/s3_srvr.c @@ -2251,10 +2251,17 @@ int ssl3_get_client_key_exchange(SSL *s) if (alg_k & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) { int idx = -1; EVP_PKEY *skey = NULL; - if (n) + if (n > 1) { n2s(p, i); - else + } else { + if (alg_k & SSL_kDHE) { + al = SSL_AD_HANDSHAKE_FAILURE; + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG); + goto f_err; + } i = 0; + } if (n && n != i + 2) { if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG)) { SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, @@ -3260,14 +3267,16 @@ int ssl3_send_server_certificate(SSL *s) /* send a new session ticket (not necessarily for a new session) */ int ssl3_send_newsession_ticket(SSL *s) { + unsigned char *senc = NULL; + EVP_CIPHER_CTX ctx; + HMAC_CTX hctx; + if (s->state == SSL3_ST_SW_SESSION_TICKET_A) { - unsigned char *p, *senc, *macstart; + unsigned char *p, *macstart; const unsigned char *const_p; int len, slen_full, slen; SSL_SESSION *sess; unsigned int hlen; - EVP_CIPHER_CTX ctx; - HMAC_CTX hctx; SSL_CTX *tctx = s->initial_ctx; unsigned char iv[EVP_MAX_IV_LENGTH]; unsigned char key_name[16]; @@ -3278,32 +3287,38 @@ int ssl3_send_newsession_ticket(SSL *s) * Some length values are 16 bits, so forget it if session is too * long */ - if (slen_full > 0xFF00) + if (slen_full == 0 || slen_full > 0xFF00) return -1; senc = OPENSSL_malloc(slen_full); if (!senc) return -1; + + EVP_CIPHER_CTX_init(&ctx); + HMAC_CTX_init(&hctx); + p = senc; - i2d_SSL_SESSION(s->session, &p); + if (!i2d_SSL_SESSION(s->session, &p)) + goto err; /* * create a fresh copy (not shared with other threads) to clean up */ const_p = senc; sess = d2i_SSL_SESSION(NULL, &const_p, slen_full); - if (sess == NULL) { - OPENSSL_free(senc); - return -1; - } + if (sess == NULL) + goto err; sess->session_id_length = 0; /* ID is irrelevant for the ticket */ slen = i2d_SSL_SESSION(sess, NULL); - if (slen > slen_full) { /* shouldn't ever happen */ - OPENSSL_free(senc); - return -1; + if (slen == 0 || slen > slen_full) { /* shouldn't ever happen */ + SSL_SESSION_free(sess); + goto err; } p = senc; - i2d_SSL_SESSION(sess, &p); + if (!i2d_SSL_SESSION(sess, &p)) { + SSL_SESSION_free(sess); + goto err; + } SSL_SESSION_free(sess); /*- @@ -3317,26 +3332,26 @@ int ssl3_send_newsession_ticket(SSL *s) if (!BUF_MEM_grow(s->init_buf, SSL_HM_HEADER_LENGTH(s) + 22 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + slen)) - return -1; + goto err; + p = ssl_handshake_start(s); - EVP_CIPHER_CTX_init(&ctx); - HMAC_CTX_init(&hctx); /* * Initialize HMAC and cipher contexts. If callback present it does * all the work otherwise use generated values from parent ctx. */ if (tctx->tlsext_ticket_key_cb) { if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx, - &hctx, 1) < 0) { - OPENSSL_free(senc); - return -1; - } + &hctx, 1) < 0) + goto err; } else { - RAND_pseudo_bytes(iv, 16); - EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, - tctx->tlsext_tick_aes_key, iv); - HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16, - tlsext_tick_md(), NULL); + if (RAND_bytes(iv, 16) <= 0) + goto err; + if (!EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, + tctx->tlsext_tick_aes_key, iv)) + goto err; + if (!HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16, + tlsext_tick_md(), NULL)) + goto err; memcpy(key_name, tctx->tlsext_tick_key_name, 16); } @@ -3357,14 +3372,19 @@ int ssl3_send_newsession_ticket(SSL *s) memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx)); p += EVP_CIPHER_CTX_iv_length(&ctx); /* Encrypt session data */ - EVP_EncryptUpdate(&ctx, p, &len, senc, slen); + if (!EVP_EncryptUpdate(&ctx, p, &len, senc, slen)) + goto err; p += len; - EVP_EncryptFinal(&ctx, p, &len); + if (!EVP_EncryptFinal(&ctx, p, &len)) + goto err; p += len; - EVP_CIPHER_CTX_cleanup(&ctx); - HMAC_Update(&hctx, macstart, p - macstart); - HMAC_Final(&hctx, p, &hlen); + if (!HMAC_Update(&hctx, macstart, p - macstart)) + goto err; + if (!HMAC_Final(&hctx, p, &hlen)) + goto err; + + EVP_CIPHER_CTX_cleanup(&ctx); HMAC_CTX_cleanup(&hctx); p += hlen; @@ -3381,6 +3401,12 @@ int ssl3_send_newsession_ticket(SSL *s) /* SSL3_ST_SW_SESSION_TICKET_B */ return ssl_do_write(s); + err: + if (senc) + OPENSSL_free(senc); + EVP_CIPHER_CTX_cleanup(&ctx); + HMAC_CTX_cleanup(&hctx); + return -1; } int ssl3_send_cert_status(SSL *s) |