/*
- * Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
#ifndef OPENSSL_NO_EC
static int use_ecc(SSL *s)
{
- int i, end;
+ int i, end, ret = 0;
unsigned long alg_k, alg_a;
STACK_OF(SSL_CIPHER) *cipher_stack = NULL;
if (s->version == SSL3_VERSION)
return 0;
- cipher_stack = SSL_get_ciphers(s);
+ cipher_stack = SSL_get1_supported_ciphers(s);
end = sk_SSL_CIPHER_num(cipher_stack);
for (i = 0; i < end; i++) {
const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
alg_a = c->algorithm_auth;
if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK))
|| (alg_a & SSL_aECDSA)
- || c->min_tls >= TLS1_3_VERSION)
- return 1;
+ || c->min_tls >= TLS1_3_VERSION) {
+ ret = 1;
+ break;
+ }
}
- return 0;
+ sk_SSL_CIPHER_free(cipher_stack);
+ return ret;
}
EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
if (tls_curve_allowed(s, ctmp, SSL_SECOP_CURVE_SUPPORTED)) {
if (!WPACKET_put_bytes_u16(pkt, ctmp)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
- ERR_R_INTERNAL_ERROR);
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
+ ERR_R_INTERNAL_ERROR);
return EXT_RETURN_FAIL;
}
}
}
if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
- ERR_R_INTERNAL_ERROR);
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
+ ERR_R_INTERNAL_ERROR);
return EXT_RETURN_FAIL;
}
EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx)
{
+ if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET)
+ return EXT_RETURN_NOT_SENT;
+
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret)
|| !WPACKET_put_bytes_u16(pkt, 0)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EMS,
{
int currv, min_version, max_version, reason;
+ reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL);
+ if (reason != 0) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason);
+ return EXT_RETURN_FAIL;
+ }
+
+ /*
+ * Don't include this if we can't negotiate TLSv1.3. We can do a straight
+ * comparison here because we will never be called in DTLS.
+ */
+ if (max_version < TLS1_3_VERSION)
+ return EXT_RETURN_NOT_SENT;
+
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions)
|| !WPACKET_start_sub_packet_u16(pkt)
|| !WPACKET_start_sub_packet_u8(pkt)) {
return EXT_RETURN_FAIL;
}
- reason = ssl_get_min_max_version(s, &min_version, &max_version);
- if (reason != 0) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR,
- SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason);
- return EXT_RETURN_FAIL;
- }
-
- /*
- * TODO(TLS1.3): There is some discussion on the TLS list as to whether
- * we should include versions <TLS1.2. For the moment we do. To be
- * reviewed later.
- */
for (currv = max_version; currv >= min_version; currv--) {
- /* TODO(TLS1.3): Remove this first if clause prior to release!! */
- if (currv == TLS1_3_VERSION) {
- if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR,
- SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
- ERR_R_INTERNAL_ERROR);
- return EXT_RETURN_FAIL;
- }
- } else if (!WPACKET_put_bytes_u16(pkt, currv)) {
+ if (!WPACKET_put_bytes_u16(pkt, currv)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR,
SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
ERR_R_INTERNAL_ERROR);
size_t encodedlen;
if (s->s3->tmp.pkey != NULL) {
- if (!ossl_assert(s->hello_retry_request)) {
+ if (!ossl_assert(s->hello_retry_request == SSL_HRR_PENDING)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE,
ERR_R_INTERNAL_ERROR);
return 0;
ERR_R_INTERNAL_ERROR);
return EXT_RETURN_FAIL;
}
-#endif
-
return EXT_RETURN_SENT;
+#else
+ return EXT_RETURN_NOT_SENT;
+#endif
}
EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
unsigned int context, X509 *x,
size_t chainidx)
{
+#ifndef OPENSSL_NO_PSK
+ char identity[PSK_MAX_IDENTITY_LEN + 1];
+#endif /* OPENSSL_NO_PSK */
const unsigned char *id = NULL;
size_t idlen = 0;
SSL_SESSION *psksess = NULL;
SSL_SESSION *edsess = NULL;
const EVP_MD *handmd = NULL;
- if (s->hello_retry_request)
+ if (s->hello_retry_request == SSL_HRR_PENDING)
handmd = ssl_handshake_md(s);
if (s->psk_use_session_cb != NULL
return EXT_RETURN_FAIL;
}
+#ifndef OPENSSL_NO_PSK
+ if (psksess == NULL && s->psk_client_callback != NULL) {
+ unsigned char psk[PSK_MAX_PSK_LEN];
+ size_t psklen = 0;
+
+ memset(identity, 0, sizeof(identity));
+ psklen = s->psk_client_callback(s, NULL, identity, sizeof(identity) - 1,
+ psk, sizeof(psk));
+
+ if (psklen > PSK_MAX_PSK_LEN) {
+ SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
+ SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR);
+ return EXT_RETURN_FAIL;
+ } else if (psklen > 0) {
+ const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 };
+ const SSL_CIPHER *cipher;
+
+ idlen = strlen(identity);
+ if (idlen > PSK_MAX_IDENTITY_LEN) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
+ ERR_R_INTERNAL_ERROR);
+ return EXT_RETURN_FAIL;
+ }
+ id = (unsigned char *)identity;
+
+ /*
+ * We found a PSK using an old style callback. We don't know
+ * the digest so we default to SHA256 as per the TLSv1.3 spec
+ */
+ cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id);
+ if (cipher == NULL) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
+ ERR_R_INTERNAL_ERROR);
+ return EXT_RETURN_FAIL;
+ }
+
+ psksess = SSL_SESSION_new();
+ if (psksess == NULL
+ || !SSL_SESSION_set1_master_key(psksess, psk, psklen)
+ || !SSL_SESSION_set_cipher(psksess, cipher)
+ || !SSL_SESSION_set_protocol_version(psksess, TLS1_3_VERSION)) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
+ ERR_R_INTERNAL_ERROR);
+ OPENSSL_cleanse(psk, psklen);
+ return EXT_RETURN_FAIL;
+ }
+ OPENSSL_cleanse(psk, psklen);
+ }
+ }
+#endif /* OPENSSL_NO_PSK */
+
SSL_SESSION_free(s->psksession);
s->psksession = psksess;
if (psksess != NULL) {
size_t reshashsize = 0, pskhashsize = 0, binderoffset, msglen;
unsigned char *resbinder = NULL, *pskbinder = NULL, *msgstart = NULL;
const EVP_MD *handmd = NULL, *mdres = NULL, *mdpsk = NULL;
- EXT_RETURN ret = EXT_RETURN_FAIL;
int dores = 0;
- s->session->ext.tick_identity = TLSEXT_PSK_BAD_IDENTITY;
+ s->ext.tick_identity = 0;
/*
* Note: At this stage of the code we only support adding a single
|| (s->session->ext.ticklen == 0 && s->psksession == NULL))
return EXT_RETURN_NOT_SENT;
- if (s->hello_retry_request)
+ if (s->hello_retry_request == SSL_HRR_PENDING)
handmd = ssl_handshake_md(s);
if (s->session->ext.ticklen != 0) {
if (s->session->cipher == NULL) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
ERR_R_INTERNAL_ERROR);
- goto err;
+ return EXT_RETURN_FAIL;
}
mdres = ssl_md(s->session->cipher->algorithm2);
if (mdres == NULL) {
goto dopsksess;
}
- if (s->hello_retry_request && mdres != handmd) {
+ if (s->hello_retry_request == SSL_HRR_PENDING && mdres != handmd) {
/*
* Selected ciphersuite hash does not match the hash for the session
* so we can't use it.
*/
now = (uint32_t)time(NULL);
agesec = now - (uint32_t)s->session->time;
+ /*
+ * We calculate the age in seconds but the server may work in ms. Due to
+ * rounding errors we could overestimate the age by up to 1s. It is
+ * better to underestimate it. Otherwise, if the RTT is very short, when
+ * the server calculates the age reported by the client it could be
+ * bigger than the age calculated on the server - which should never
+ * happen.
+ */
+ if (agesec > 0)
+ agesec--;
if (s->session->ext.tick_lifetime_hint < agesec) {
/* Ticket is too old. Ignore it. */
agems += s->session->ext.tick_age_add;
reshashsize = EVP_MD_size(mdres);
+ s->ext.tick_identity++;
dores = 1;
}
*/
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
SSL_R_BAD_PSK);
- goto err;
+ return EXT_RETURN_FAIL;
}
- if (s->hello_retry_request && mdpsk != handmd) {
+ if (s->hello_retry_request == SSL_HRR_PENDING && mdpsk != handmd) {
/*
* Selected ciphersuite hash does not match the hash for the PSK
* session. This is an application bug.
*/
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
SSL_R_BAD_PSK);
- goto err;
+ return EXT_RETURN_FAIL;
}
pskhashsize = EVP_MD_size(mdpsk);
|| !WPACKET_start_sub_packet_u16(pkt)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
ERR_R_INTERNAL_ERROR);
- goto err;
+ return EXT_RETURN_FAIL;
}
if (dores) {
|| !WPACKET_put_bytes_u32(pkt, agems)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
ERR_R_INTERNAL_ERROR);
- goto err;
+ return EXT_RETURN_FAIL;
}
}
|| !WPACKET_put_bytes_u32(pkt, 0)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
ERR_R_INTERNAL_ERROR);
- goto err;
+ return EXT_RETURN_FAIL;
}
+ s->ext.tick_identity++;
}
if (!WPACKET_close(pkt)
|| !WPACKET_fill_lengths(pkt)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
ERR_R_INTERNAL_ERROR);
- goto err;
+ return EXT_RETURN_FAIL;
}
msgstart = WPACKET_get_curr(pkt) - msglen;
if (dores
&& tls_psk_do_binder(s, mdres, msgstart, binderoffset, NULL,
resbinder, s->session, 1, 0) != 1) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
- ERR_R_INTERNAL_ERROR);
- goto err;
+ /* SSLfatal() already called */
+ return EXT_RETURN_FAIL;
}
if (s->psksession != NULL
&& tls_psk_do_binder(s, mdpsk, msgstart, binderoffset, NULL,
pskbinder, s->psksession, 1, 1) != 1) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
+ /* SSLfatal() already called */
+ return EXT_RETURN_FAIL;
+ }
+
+ return EXT_RETURN_SENT;
+#else
+ return EXT_RETURN_NOT_SENT;
+#endif
+}
+
+EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt,
+ unsigned int context,
+ X509 *x, size_t chainidx)
+{
+#ifndef OPENSSL_NO_TLS1_3
+ if (!s->pha_enabled)
+ return EXT_RETURN_NOT_SENT;
+
+ /* construct extension - 0 length, no contents */
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_post_handshake_auth)
+ || !WPACKET_start_sub_packet_u16(pkt)
+ || !WPACKET_close(pkt)) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_TLS_CONSTRUCT_CTOS_POST_HANDSHAKE_AUTH,
ERR_R_INTERNAL_ERROR);
- goto err;
+ return EXT_RETURN_FAIL;
}
- if (dores)
- s->session->ext.tick_identity = 0;
- if (s->psksession != NULL)
- s->psksession->ext.tick_identity = (dores ? 1 : 0);
+ s->post_handshake_auth = SSL_PHA_EXT_SENT;
- ret = EXT_RETURN_SENT;
- err:
- return ret;
+ return EXT_RETURN_SENT;
#else
return EXT_RETURN_NOT_SENT;
#endif
}
+
/*
* Parse the server's renegotiation binding and abort if it's not right
*/
unsigned int value;
if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) {
- SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN,
+ SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN,
SSL_R_BAD_EXTENSION);
return 0;
}
int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx)
{
- unsigned int ecpointformats_len;
+ size_t ecpointformats_len;
PACKET ecptformatlist;
if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) {
}
if (!s->hit) {
ecpointformats_len = PACKET_remaining(&ecptformatlist);
- s->session->ext.ecpointformats_len = 0;
+ if (ecpointformats_len == 0) {
+ SSLfatal(s, SSL_AD_DECODE_ERROR,
+ SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, SSL_R_BAD_LENGTH);
+ return 0;
+ }
+ s->session->ext.ecpointformats_len = 0;
OPENSSL_free(s->session->ext.ecpointformats);
s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len);
if (s->session->ext.ecpointformats == NULL) {
int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx)
{
+ if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) {
+ /* We ignore this if the server sends a CertificateRequest */
+ /* TODO(TLS1.3): Add support for this */
+ return 1;
+ }
+
/*
* MUST only be sent if we've requested a status
* request message. In TLS <= 1.2 it must also be empty.
int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx)
{
+ if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) {
+ /* We ignore this if the server sends it in a CertificateRequest */
+ /* TODO(TLS1.3): Add support for this */
+ return 1;
+ }
+
/*
* Only take it if we asked for it - i.e if there is no CT validation
* callback set, then a custom extension MAY be processing it, so we
s->ext.early_data_ok = 0;
}
if (!s->hit) {
- /* If a new session then update it with the selected ALPN */
+ /*
+ * This is a new session and so alpn_selected should have been
+ * initialised to NULL. We should update it with the selected ALPN.
+ */
+ if (!ossl_assert(s->session->ext.alpn_selected == NULL)) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
s->session->ext.alpn_selected =
OPENSSL_memdup(s->s3->alpn_selected, s->s3->alpn_selected_len);
if (s->session->ext.alpn_selected == NULL) {
int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx)
{
+ if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET)
+ return 1;
s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS;
if (!s->hit)
s->session->flags |= SSL_SESS_FLAG_EXTMS;
return 1;
}
+int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx)
+{
+ unsigned int version;
+
+ if (!PACKET_get_net_2(pkt, &version)
+ || PACKET_remaining(pkt) != 0) {
+ SSLfatal(s, SSL_AD_DECODE_ERROR,
+ SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS,
+ SSL_R_LENGTH_MISMATCH);
+ return 0;
+ }
+
+ /*
+ * The only protocol version we support which is valid in this extension in
+ * a ServerHello is TLSv1.3 therefore we shouldn't be getting anything else.
+ */
+ if (version != TLS1_3_VERSION) {
+ SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
+ SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS,
+ SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
+ return 0;
+ }
+
+ /* We ignore this extension for HRRs except to sanity check it */
+ if (context == SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST)
+ return 1;
+
+ /* We just set it here. We validate it in ssl_choose_client_version */
+ s->version = version;
+
+ return 1;
+}
+
int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx)
{
}
if (!s->ext.early_data_ok
- || !s->hit
- || s->session->ext.tick_identity != 0) {
+ || !s->hit) {
/*
* If we get here then we didn't send early data, or we didn't resume
* using the first identity, or the SNI/ALPN is not consistent so the
return 0;
}
- if (s->session->ext.tick_identity == (int)identity) {
+ if (identity >= (unsigned int)s->ext.tick_identity) {
+ SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_PSK,
+ SSL_R_BAD_PSK_IDENTITY);
+ return 0;
+ }
+
+ /*
+ * Session resumption tickets are always sent before PSK tickets. If the
+ * ticket index is 0 then it must be for a session resumption ticket if we
+ * sent two tickets, or if we didn't send a PSK ticket.
+ */
+ if (identity == 0 && (s->psksession == NULL || s->ext.tick_identity == 2)) {
s->hit = 1;
SSL_SESSION_free(s->psksession);
s->psksession = NULL;
return 1;
}
- if (s->psksession == NULL
- || s->psksession->ext.tick_identity != (int)identity) {
- SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_PSK,
- SSL_R_BAD_PSK_IDENTITY);
+ if (s->psksession == NULL) {
+ /* Should never happen */
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_PSK,
+ ERR_R_INTERNAL_ERROR);
return 0;
}
s->session = s->psksession;
s->psksession = NULL;
s->hit = 1;
+ /* Early data is only allowed if we used the first ticket */
+ if (identity != 0)
+ s->ext.early_data_ok = 0;
#endif
return 1;
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