diff options
Diffstat (limited to 'openssl/ssl/t1_lib.c')
| -rw-r--r-- | openssl/ssl/t1_lib.c | 46 |
1 files changed, 40 insertions, 6 deletions
diff --git a/openssl/ssl/t1_lib.c b/openssl/ssl/t1_lib.c index 33afdeba3..bddffd92c 100644 --- a/openssl/ssl/t1_lib.c +++ b/openssl/ssl/t1_lib.c @@ -662,6 +662,36 @@ unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned cha } #endif +#ifdef TLSEXT_TYPE_padding + /* Add padding to workaround bugs in F5 terminators. + * See https://tools.ietf.org/html/draft-agl-tls-padding-03 + * + * NB: because this code works out the length of all existing + * extensions it MUST always appear last. + */ + { + int hlen = ret - (unsigned char *)s->init_buf->data; + /* The code in s23_clnt.c to build ClientHello messages includes the + * 5-byte record header in the buffer, while the code in s3_clnt.c does + * not. */ + if (s->state == SSL23_ST_CW_CLNT_HELLO_A) + hlen -= 5; + if (hlen > 0xff && hlen < 0x200) + { + hlen = 0x200 - hlen; + if (hlen >= 4) + hlen -= 4; + else + hlen = 0; + + s2n(TLSEXT_TYPE_padding, ret); + s2n(hlen, ret); + memset(ret, 0, hlen); + ret += hlen; + } + } +#endif + if ((extdatalen = ret-p-2)== 0) return p; @@ -1261,7 +1291,7 @@ int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in } } else if (type == TLSEXT_TYPE_status_request && - s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb) + s->version != DTLS1_VERSION) { if (size < 5) @@ -2558,16 +2588,20 @@ tls1_process_heartbeat(SSL *s) unsigned int payload; unsigned int padding = 16; /* Use minimum padding */ - /* Read type and payload length first */ - hbtype = *p++; - n2s(p, payload); - pl = p; - if (s->msg_callback) s->msg_callback(0, s->version, TLS1_RT_HEARTBEAT, &s->s3->rrec.data[0], s->s3->rrec.length, s, s->msg_callback_arg); + /* Read type and payload length first */ + if (1 + 2 + 16 > s->s3->rrec.length) + return 0; /* silently discard */ + hbtype = *p++; + n2s(p, payload); + if (1 + 2 + payload + 16 > s->s3->rrec.length) + return 0; /* silently discard per RFC 6520 sec. 4 */ + pl = p; + if (hbtype == TLS1_HB_REQUEST) { unsigned char *buffer, *bp; |