From 956006b741f9e5dbeaf98356317e51ef7110746b Mon Sep 17 00:00:00 2001 From: "Dr. Stephen Henson" Date: Mon, 20 Aug 2007 12:35:20 +0000 Subject: [PATCH] Use SHA256 for ticket HMAC if possible. --- ssl/s3_srvr.c | 2 +- ssl/ssl_locl.h | 5 +++++ ssl/t1_lib.c | 4 ++-- 3 files changed, 8 insertions(+), 3 deletions(-) diff --git a/ssl/s3_srvr.c b/ssl/s3_srvr.c index 1246cd227f..17ee4da35e 100644 --- a/ssl/s3_srvr.c +++ b/ssl/s3_srvr.c @@ -2792,7 +2792,7 @@ int ssl3_send_newsession_ticket(SSL *s) HMAC_CTX_init(&hctx); HMAC_Init_ex(&hctx, s->ctx->tlsext_tick_hmac_key, 16, - EVP_sha1(), NULL); + tlsext_tick_md(), NULL); HMAC_Update(&hctx, macstart, p - macstart); HMAC_Final(&hctx, p, &hlen); HMAC_CTX_cleanup(&hctx); diff --git a/ssl/ssl_locl.h b/ssl/ssl_locl.h index e6990dc2a1..5bed3974ce 100644 --- a/ssl/ssl_locl.h +++ b/ssl/ssl_locl.h @@ -987,6 +987,11 @@ int ssl_prepare_clienthello_tlsext(SSL *s); int ssl_prepare_serverhello_tlsext(SSL *s); int ssl_check_clienthello_tlsext(SSL *s); int ssl_check_serverhello_tlsext(SSL *s); +#ifdef OPENSSL_NO_SHA256 +#define tlsext_tick_md EVP_sha1 +#else +#define tlsext_tick_md EVP_sha256 +#endif int tls1_process_ticket(SSL *s, unsigned char *session_id, int len, const unsigned char *limit, SSL_SESSION **ret); #endif diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c index 232ab4ea57..b5eab2cb68 100644 --- a/ssl/t1_lib.c +++ b/ssl/t1_lib.c @@ -985,7 +985,7 @@ static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen, /* Attempt to process session ticket, first conduct sanity and * integrity checks on ticket. */ - mlen = EVP_MD_size(EVP_sha1()); + mlen = EVP_MD_size(tlsext_tick_md()); eticklen -= mlen; /* Need at least keyname + iv + some encrypted data */ if (eticklen < 48) @@ -996,7 +996,7 @@ static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen, /* Check HMAC of encrypted ticket */ HMAC_CTX_init(&hctx); HMAC_Init_ex(&hctx, s->ctx->tlsext_tick_hmac_key, 16, - EVP_sha1(), NULL); + tlsext_tick_md(), NULL); HMAC_Update(&hctx, etick, eticklen); HMAC_Final(&hctx, tick_hmac, NULL); HMAC_CTX_cleanup(&hctx); -- 2.25.1