size_t i;
for (i = 0; i < OSSL_NELEM(nid_list); i++) {
if (nid_list[i].nid == nid)
- return i + 1;
+ return (int)(i + 1);
}
return 0;
}
{
size_t pcurveslen = 0;
if (sess) {
- *pcurves = s->session->tlsext_ellipticcurvelist;
- pcurveslen = s->session->tlsext_ellipticcurvelist_length;
+ *pcurves = s->session->tlsext_supportedgroupslist;
+ pcurveslen = s->session->tlsext_supportedgroupslist_length;
} else {
/* For Suite B mode only include P-256, P-384 */
switch (tls1_suiteb(s)) {
pcurveslen = 2;
break;
default:
- *pcurves = s->tlsext_ellipticcurvelist;
- pcurveslen = s->tlsext_ellipticcurvelist_length;
+ *pcurves = s->tlsext_supportedgroupslist;
+ pcurveslen = s->tlsext_supportedgroupslist_length;
}
if (!*pcurves) {
*pcurves = eccurves_default;
}
/*-
- * For nmatch >= 0, return the NID of the |nmatch|th shared curve or NID_undef
+ * For nmatch >= 0, return the NID of the |nmatch|th shared group or NID_undef
* if there is no match.
* For nmatch == -1, return number of matches
- * For nmatch == -2, return the NID of the curve to use for
+ * For nmatch == -2, return the NID of the group to use for
* an EC tmp key, or NID_undef if there is no match.
*/
-int tls1_shared_curve(SSL *s, int nmatch)
+int tls1_shared_group(SSL *s, int nmatch)
{
const unsigned char *pref, *supp;
size_t num_pref, num_supp, i, j;
return NID_undef;
}
-int tls1_set_curves(unsigned char **pext, size_t *pextlen,
- int *curves, size_t ncurves)
+int tls1_set_groups(unsigned char **pext, size_t *pextlen,
+ int *groups, size_t ngroups)
{
- unsigned char *clist, *p;
+ unsigned char *glist, *p;
size_t i;
/*
- * Bitmap of curves included to detect duplicates: only works while curve
+ * Bitmap of groups included to detect duplicates: only works while group
* ids < 32
*/
unsigned long dup_list = 0;
- clist = OPENSSL_malloc(ncurves * 2);
- if (clist == NULL)
+ glist = OPENSSL_malloc(ngroups * 2);
+ if (glist == NULL)
return 0;
- for (i = 0, p = clist; i < ncurves; i++) {
+ for (i = 0, p = glist; i < ngroups; i++) {
unsigned long idmask;
int id;
- id = tls1_ec_nid2curve_id(curves[i]);
+ /* TODO(TLS1.3): Convert for DH groups */
+ id = tls1_ec_nid2curve_id(groups[i]);
idmask = 1L << id;
if (!id || (dup_list & idmask)) {
- OPENSSL_free(clist);
+ OPENSSL_free(glist);
return 0;
}
dup_list |= idmask;
s2n(id, p);
}
OPENSSL_free(*pext);
- *pext = clist;
- *pextlen = ncurves * 2;
+ *pext = glist;
+ *pextlen = ngroups * 2;
return 1;
}
return 1;
}
-/* Set curves based on a colon separate list */
-int tls1_set_curves_list(unsigned char **pext, size_t *pextlen, const char *str)
+/* Set groups based on a colon separate list */
+int tls1_set_groups_list(unsigned char **pext, size_t *pextlen, const char *str)
{
nid_cb_st ncb;
ncb.nidcnt = 0;
return 0;
if (pext == NULL)
return 1;
- return tls1_set_curves(pext, pextlen, ncb.nid_arr, ncb.nidcnt);
+ return tls1_set_groups(pext, pextlen, ncb.nid_arr, ncb.nidcnt);
}
/* For an EC key set TLS id and required compression based on parameters */
return 1;
}
/* Need a shared curve */
- if (tls1_shared_curve(s, 0))
+ if (tls1_shared_group(s, 0))
return 1;
return 0;
}
int ssl_add_clienthello_tlsext(SSL *s, WPACKET *pkt, int *al)
{
#ifndef OPENSSL_NO_EC
- /* See if we support any ECC ciphersuites */
+ const unsigned char *pcurves = NULL;
+ size_t num_curves = 0;
int using_ecc = 0;
- if (s->version >= TLS1_VERSION || SSL_IS_DTLS(s)) {
+
+ /* See if we support any ECC ciphersuites */
+ if ((s->version >= TLS1_VERSION && s->version <= TLS1_2_VERSION)
+ || SSL_IS_DTLS(s)) {
int i;
unsigned long alg_k, alg_a;
STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
break;
}
}
+ } else if (s->version >= TLS1_3_VERSION) {
+ /*
+ * TODO(TLS1.3): We always use ECC for TLSv1.3 at the moment. This will
+ * change if we implement DH key shares
+ */
+ using_ecc = 1;
+ }
+#else
+ if (s->version >= TLS1_3_VERSION) {
+ /* Shouldn't happen! */
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return 0;
}
#endif
/*
* Add TLS extension ECPointFormats to the ClientHello message
*/
- const unsigned char *pcurves, *pformats;
- size_t num_curves, num_formats;
+ const unsigned char *pformats, *pcurvestmp;
+ size_t num_formats;
size_t i;
tls1_get_formatlist(s, &pformats, &num_formats);
}
/*
- * Add TLS extension EllipticCurves to the ClientHello message
+ * Add TLS extension supported_groups to the ClientHello message
*/
- pcurves = s->tlsext_ellipticcurvelist;
+ /* TODO(TLS1.3): Add support for DHE groups */
+ pcurves = s->tlsext_supportedgroupslist;
if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
return 0;
}
+ pcurvestmp = pcurves;
- if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_elliptic_curves)
- /* Sub-packet for curves extension */
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups)
+ /* Sub-packet for supported_groups extension */
|| !WPACKET_start_sub_packet_u16(pkt)
|| !WPACKET_start_sub_packet_u16(pkt)) {
SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
return 0;
}
/* Copy curve ID if supported */
- for (i = 0; i < num_curves; i++, pcurves += 2) {
+ for (i = 0; i < num_curves; i++, pcurvestmp += 2) {
if (tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) {
- if (!WPACKET_put_bytes_u8(pkt, pcurves[0])
- || !WPACKET_put_bytes_u8(pkt, pcurves[1])) {
+ if (!WPACKET_put_bytes_u8(pkt, pcurvestmp[0])
+ || !WPACKET_put_bytes_u8(pkt, pcurvestmp[1])) {
SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT,
ERR_R_INTERNAL_ERROR);
return 0;
#endif /* OPENSSL_NO_EC */
if (tls_use_ticket(s)) {
- int ticklen;
+ size_t ticklen;
if (!s->new_session && s->session && s->session->tlsext_tick)
ticklen = s->session->tlsext_ticklen;
else if (s->session && s->tlsext_session_ticket &&
}
}
#endif
-#ifndef OPENSSL_NO_HEARTBEATS
- if (SSL_IS_DTLS(s)) {
- unsigned int mode;
-
- /*-
- * Set mode:
- * 1: peer may send requests
- * 2: peer not allowed to send requests
- */
- if (s->tlsext_heartbeat & SSL_DTLSEXT_HB_DONT_RECV_REQUESTS)
- mode = SSL_DTLSEXT_HB_DONT_SEND_REQUESTS;
- else
- mode = SSL_DTLSEXT_HB_ENABLED;
-
- if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_heartbeat)
- /* Sub-packet for Hearbeat extension */
- || !WPACKET_start_sub_packet_u16(pkt)
- || !WPACKET_put_bytes_u8(pkt, mode)
- || !WPACKET_close(pkt)) {
- SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return 0;
- }
- }
-#endif
#ifndef OPENSSL_NO_NEXTPROTONEG
if (s->ctx->next_proto_select_cb && !s->s3->tmp.finish_md_len) {
return 0;
}
+ /* TLS1.3 specific extensions */
+ if (SSL_IS_TLS13(s)) {
+ int min_version, max_version, reason, currv;
+ size_t i, sharessent = 0;
+
+ /* TODO(TLS1.3): Should we add this extension for versions < TLS1.3? */
+ /* supported_versions extension */
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions)
+ || !WPACKET_start_sub_packet_u16(pkt)
+ || !WPACKET_start_sub_packet_u8(pkt)) {
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ reason = ssl_get_client_min_max_version(s, &min_version, &max_version);
+ if (reason != 0) {
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, reason);
+ return 0;
+ }
+ /*
+ * TODO(TLS1.3): There is some discussion on the TLS list as to wheter
+ * 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)) {
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ } else if (!WPACKET_put_bytes_u16(pkt, currv)) {
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ }
+ if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+
+ /* key_share extension */
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share)
+ /* Extension data sub-packet */
+ || !WPACKET_start_sub_packet_u16(pkt)
+ /* KeyShare list sub-packet */
+ || !WPACKET_start_sub_packet_u16(pkt)) {
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ /*
+ * TODO(TLS1.3): Make the number of key_shares sent configurable. For
+ * now, just send one
+ */
+ for (i = 0; i < num_curves && sharessent < 1; i++, pcurves += 2) {
+ if (tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) {
+ unsigned char *encodedPoint = NULL;
+ unsigned int curve_id = 0;
+ EVP_PKEY *key_share_key = NULL;
+ size_t encodedlen;
+
+ if (s->s3->tmp.pkey != NULL) {
+ /* Shouldn't happen! */
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ /* Generate a key for this key_share */
+ curve_id = (pcurves[0] << 8) | pcurves[1];
+ key_share_key = ssl_generate_pkey_curve(curve_id);
+ if (key_share_key == NULL) {
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_EVP_LIB);
+ return 0;
+ }
+
+ /* Encode the public key. */
+ encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key,
+ &encodedPoint);
+ if (encodedlen == 0) {
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_EC_LIB);
+ EVP_PKEY_free(key_share_key);
+ return 0;
+ }
+
+ /* Create KeyShareEntry */
+ if (!WPACKET_put_bytes_u16(pkt, curve_id)
+ || !WPACKET_sub_memcpy_u16(pkt, encodedPoint,
+ encodedlen)) {
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT,
+ ERR_R_INTERNAL_ERROR);
+ EVP_PKEY_free(key_share_key);
+ OPENSSL_free(encodedPoint);
+ return 0;
+ }
+
+ /*
+ * TODO(TLS1.3): When changing to send more than one key_share
+ * we're going to need to be able to save more than one EVP_PKEY
+ * For now we reuse the existing tmp.pkey
+ */
+ s->s3->group_id = curve_id;
+ s->s3->tmp.pkey = key_share_key;
+ sharessent++;
+ OPENSSL_free(encodedPoint);
+ }
+ }
+ if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ }
+
/*
* Add padding to workaround bugs in F5 terminators. See
* https://tools.ietf.org/html/draft-agl-tls-padding-03 NB: because this
return 0;
}
}
-#ifndef OPENSSL_NO_HEARTBEATS
- /* Add Heartbeat extension if we've received one */
- if (SSL_IS_DTLS(s) && (s->tlsext_heartbeat & SSL_DTLSEXT_HB_ENABLED)) {
- unsigned int mode;
- /*-
- * Set mode:
- * 1: peer may send requests
- * 2: peer not allowed to send requests
- */
- if (s->tlsext_heartbeat & SSL_DTLSEXT_HB_DONT_RECV_REQUESTS)
- mode = SSL_DTLSEXT_HB_DONT_SEND_REQUESTS;
- else
- mode = SSL_DTLSEXT_HB_ENABLED;
-
- if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_heartbeat)
- || !WPACKET_start_sub_packet_u16(pkt)
- || !WPACKET_put_bytes_u8(pkt, mode)
- || !WPACKET_close(pkt)) {
- SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return 0;
- }
-
- }
-#endif
#ifndef OPENSSL_NO_NEXTPROTONEG
next_proto_neg_seen = s->s3->next_proto_neg_seen;
}
}
#endif
+
+ if (s->version == TLS1_3_VERSION && !s->hit) {
+ unsigned char *encodedPoint;
+ size_t encoded_pt_len = 0;
+ EVP_PKEY *ckey = NULL, *skey = NULL;
+
+ ckey = s->s3->peer_tmp;
+ if (ckey == NULL) {
+ SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share)
+ || !WPACKET_start_sub_packet_u16(pkt)
+ || !WPACKET_put_bytes_u16(pkt, s->s3->group_id)) {
+ SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ skey = ssl_generate_pkey(ckey);
+
+ /* Generate encoding of server key */
+ encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(skey, &encodedPoint);
+ if (encoded_pt_len == 0) {
+ SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_EC_LIB);
+ EVP_PKEY_free(skey);
+ return 0;
+ }
+
+ if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len)
+ || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ EVP_PKEY_free(skey);
+ OPENSSL_free(encodedPoint);
+ return 0;
+ }
+ OPENSSL_free(encodedPoint);
+
+ s->s3->tmp.pkey = skey;
+
+ if (ssl_derive(s, skey, ckey, 1) == 0) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ }
+
if (!custom_ext_add(s, 1, pkt, al)) {
SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
return 0;
if (s->ctx->alpn_select_cb != NULL && s->s3->alpn_proposed != NULL) {
int r = s->ctx->alpn_select_cb(s, &selected, &selected_len,
s->s3->alpn_proposed,
- s->s3->alpn_proposed_len,
+ (unsigned int)s->s3->alpn_proposed_len,
s->ctx->alpn_select_cb_arg);
if (r == SSL_TLSEXT_ERR_OK) {
#ifndef OPENSSL_NO_EC
/*-
* ssl_check_for_safari attempts to fingerprint Safari using OS X
- * SecureTransport using the TLS extension block in |pkt|.
+ * SecureTransport using the TLS extension block in |hello|.
* Safari, since 10.6, sends exactly these extensions, in this order:
* SNI,
* elliptic_curves
* Sadly we cannot differentiate 10.6, 10.7 and 10.8.4 (which work), from
* 10.8..10.8.3 (which don't work).
*/
-static void ssl_check_for_safari(SSL *s, const PACKET *pkt)
+static void ssl_check_for_safari(SSL *s, const CLIENTHELLO_MSG *hello)
{
unsigned int type;
PACKET sni, tmppkt;
/* Length of the common prefix (first two extensions). */
static const size_t kSafariCommonExtensionsLength = 18;
- tmppkt = *pkt;
+ tmppkt = hello->extensions;
if (!PACKET_forward(&tmppkt, 2)
|| !PACKET_get_net_2(&tmppkt, &type)
}
#endif /* !OPENSSL_NO_EC */
+
+/*
+ * Process the supported_groups extension if present. Returns success if the
+ * extension is absent, or if it has been successfully processed.
+ *
+ * Returns
+ * 1 on success
+ * 0 on failure
+ */
+static int tls_process_supported_groups(SSL *s, CLIENTHELLO_MSG *hello)
+{
+#ifndef OPENSSL_NO_EC
+ PACKET supported_groups_list;
+ RAW_EXTENSION *suppgroups = tls_get_extension_by_type(hello->pre_proc_exts,
+ hello->num_extensions,
+ TLSEXT_TYPE_supported_groups);
+
+ if (suppgroups == NULL)
+ return 1;
+
+ /* Each group is 2 bytes and we must have at least 1. */
+ if (!PACKET_as_length_prefixed_2(&suppgroups->data,
+ &supported_groups_list)
+ || PACKET_remaining(&supported_groups_list) == 0
+ || (PACKET_remaining(&supported_groups_list) % 2) != 0) {
+ return 0;
+ }
+
+ if (!s->hit
+ && !PACKET_memdup(&supported_groups_list,
+ &s->session->tlsext_supportedgroupslist,
+ &s->session->tlsext_supportedgroupslist_length)) {
+ return 0;
+ }
+#endif
+ return 1;
+}
+
+/*
+ * Checks a list of |groups| to determine if the |group_id| is in it. If it is
+ * and |checkallow| is 1 then additionally check if the group is allowed to be
+ * used.
+ *
+ * Returns:
+ * 1 if the group is in the list (and allowed if |checkallow| is 1)
+ * 0 otherwise
+ */
+static int check_in_list(SSL *s, unsigned int group_id,
+ const unsigned char *groups, size_t num_groups,
+ int checkallow)
+{
+ size_t i;
+
+ if (groups == NULL || num_groups == 0)
+ return 0;
+
+ for (i = 0; i < num_groups; i++, groups += 2) {
+ unsigned int share_id = (groups[0] << 8) | (groups[1]);
+ if (group_id == share_id
+ && (!checkallow || tls_curve_allowed(s, groups,
+ SSL_SECOP_CURVE_CHECK))) {
+ break;
+ }
+ }
+
+ if (i == num_groups) {
+ /* Not in list */
+ return 0;
+ }
+
+ return 1;
+}
+
/*
- * Parse ClientHello extensions and stash extension info in various parts of
- * the SSL object. Verify that there are no duplicate extensions.
+ * Loop through all remaining ClientHello extensions that we collected earlier
+ * and haven't already processed. For each one parse it and update the SSL
+ * object as required.
*
* Behaviour upon resumption is extension-specific. If the extension has no
* effect during resumption, it is parsed (to verify its format) but otherwise
* ignored.
*
- * Consumes the entire packet in |pkt|. Returns 1 on success and 0 on failure.
+ * Returns 1 on success and 0 on failure.
* Upon failure, sets |al| to the appropriate alert.
*/
-static int ssl_scan_clienthello_tlsext(SSL *s, PACKET *pkt, int *al)
+static int ssl_scan_clienthello_tlsext(SSL *s, CLIENTHELLO_MSG *hello, int *al)
{
- unsigned int type;
+ size_t loop;
int renegotiate_seen = 0;
- PACKET extensions;
*al = SSL_AD_DECODE_ERROR;
s->servername_done = 0;
OPENSSL_free(s->s3->alpn_proposed);
s->s3->alpn_proposed = NULL;
s->s3->alpn_proposed_len = 0;
-#ifndef OPENSSL_NO_HEARTBEATS
- s->tlsext_heartbeat &= ~(SSL_DTLSEXT_HB_ENABLED |
- SSL_DTLSEXT_HB_DONT_SEND_REQUESTS);
-#endif
#ifndef OPENSSL_NO_EC
if (s->options & SSL_OP_SAFARI_ECDHE_ECDSA_BUG)
- ssl_check_for_safari(s, pkt);
+ ssl_check_for_safari(s, hello);
#endif /* !OPENSSL_NO_EC */
/* Clear any signature algorithms extension received */
s->srtp_profile = NULL;
- if (PACKET_remaining(pkt) == 0)
- goto ri_check;
-
- if (!PACKET_as_length_prefixed_2(pkt, &extensions))
- return 0;
-
- if (!tls1_check_duplicate_extensions(&extensions))
+ /*
+ * We process the supported_groups extension first so that is done before
+ * we get to key_share which needs to use the information in it.
+ */
+ if (!tls_process_supported_groups(s, hello)) {
+ *al = TLS1_AD_INTERNAL_ERROR;
return 0;
+ }
/*
* We parse all extensions to ensure the ClientHello is well-formed but,
* unless an extension specifies otherwise, we ignore extensions upon
* resumption.
*/
- while (PACKET_get_net_2(&extensions, &type)) {
- PACKET extension;
- if (!PACKET_get_length_prefixed_2(&extensions, &extension))
- return 0;
+ for (loop = 0; loop < hello->num_extensions; loop++) {
+ RAW_EXTENSION *currext = &hello->pre_proc_exts[loop];
if (s->tlsext_debug_cb)
- s->tlsext_debug_cb(s, 0, type, PACKET_data(&extension),
- PACKET_remaining(&extension),
+ s->tlsext_debug_cb(s, 0, currext->type,
+ PACKET_data(&currext->data),
+ PACKET_remaining(&currext->data),
s->tlsext_debug_arg);
- if (type == TLSEXT_TYPE_renegotiate) {
- if (!ssl_parse_clienthello_renegotiate_ext(s, &extension, al))
+ if (currext->type == TLSEXT_TYPE_renegotiate) {
+ if (!ssl_parse_clienthello_renegotiate_ext(s,
+ &currext->data, al))
return 0;
renegotiate_seen = 1;
} else if (s->version == SSL3_VERSION) {
*
*/
- else if (type == TLSEXT_TYPE_server_name) {
+ else if (currext->type == TLSEXT_TYPE_server_name) {
unsigned int servname_type;
PACKET sni, hostname;
- if (!PACKET_as_length_prefixed_2(&extension, &sni)
+ if (!PACKET_as_length_prefixed_2(&currext->data, &sni)
/* ServerNameList must be at least 1 byte long. */
|| PACKET_remaining(&sni) == 0) {
return 0;
}
}
#ifndef OPENSSL_NO_SRP
- else if (type == TLSEXT_TYPE_srp) {
+ else if (currext->type == TLSEXT_TYPE_srp) {
PACKET srp_I;
- if (!PACKET_as_length_prefixed_1(&extension, &srp_I))
+ if (!PACKET_as_length_prefixed_1(&currext->data, &srp_I))
return 0;
if (PACKET_contains_zero_byte(&srp_I))
#endif
#ifndef OPENSSL_NO_EC
- else if (type == TLSEXT_TYPE_ec_point_formats) {
+ else if (currext->type == TLSEXT_TYPE_ec_point_formats) {
PACKET ec_point_format_list;
- if (!PACKET_as_length_prefixed_1(&extension, &ec_point_format_list)
+ if (!PACKET_as_length_prefixed_1(&currext->data,
+ &ec_point_format_list)
|| PACKET_remaining(&ec_point_format_list) == 0) {
return 0;
}
return 0;
}
}
- } else if (type == TLSEXT_TYPE_elliptic_curves) {
- PACKET elliptic_curve_list;
-
- /* Each NamedCurve is 2 bytes and we must have at least 1. */
- if (!PACKET_as_length_prefixed_2(&extension, &elliptic_curve_list)
- || PACKET_remaining(&elliptic_curve_list) == 0
- || (PACKET_remaining(&elliptic_curve_list) % 2) != 0) {
- return 0;
- }
-
- if (!s->hit) {
- if (!PACKET_memdup(&elliptic_curve_list,
- &s->session->tlsext_ellipticcurvelist,
- &s->
- session->tlsext_ellipticcurvelist_length)) {
- *al = TLS1_AD_INTERNAL_ERROR;
- return 0;
- }
- }
}
#endif /* OPENSSL_NO_EC */
- else if (type == TLSEXT_TYPE_session_ticket) {
+ else if (currext->type == TLSEXT_TYPE_session_ticket) {
if (s->tls_session_ticket_ext_cb &&
- !s->tls_session_ticket_ext_cb(s, PACKET_data(&extension),
- PACKET_remaining(&extension),
- s->tls_session_ticket_ext_cb_arg))
- {
+ !s->tls_session_ticket_ext_cb(s,
+ PACKET_data(&currext->data),
+ PACKET_remaining(&currext->data),
+ s->tls_session_ticket_ext_cb_arg)) {
*al = TLS1_AD_INTERNAL_ERROR;
return 0;
}
- } else if (type == TLSEXT_TYPE_signature_algorithms) {
+ } else if (currext->type == TLSEXT_TYPE_signature_algorithms) {
PACKET supported_sig_algs;
- if (!PACKET_as_length_prefixed_2(&extension, &supported_sig_algs)
+ if (!PACKET_as_length_prefixed_2(&currext->data,
+ &supported_sig_algs)
|| (PACKET_remaining(&supported_sig_algs) % 2) != 0
|| PACKET_remaining(&supported_sig_algs) == 0) {
return 0;
return 0;
}
}
- } else if (type == TLSEXT_TYPE_status_request) {
- if (!PACKET_get_1(&extension,
+ } else if (currext->type == TLSEXT_TYPE_status_request) {
+ if (!PACKET_get_1(&currext->data,
(unsigned int *)&s->tlsext_status_type)) {
return 0;
}
const unsigned char *ext_data;
PACKET responder_id_list, exts;
if (!PACKET_get_length_prefixed_2
- (&extension, &responder_id_list))
+ (&currext->data, &responder_id_list))
return 0;
/*
}
id_data = PACKET_data(&responder_id);
+ /* TODO(size_t): Convert d2i_* to size_t */
id = d2i_OCSP_RESPID(NULL, &id_data,
- PACKET_remaining(&responder_id));
+ (int)PACKET_remaining(&responder_id));
if (id == NULL)
return 0;
}
/* Read in request_extensions */
- if (!PACKET_as_length_prefixed_2(&extension, &exts))
+ if (!PACKET_as_length_prefixed_2(
+ &currext->data, &exts))
return 0;
if (PACKET_remaining(&exts) > 0) {
X509_EXTENSION_free);
s->tlsext_ocsp_exts =
d2i_X509_EXTENSIONS(NULL, &ext_data,
- PACKET_remaining(&exts));
+ (int)PACKET_remaining(&exts));
if (s->tlsext_ocsp_exts == NULL
|| ext_data != PACKET_end(&exts)) {
return 0;
s->tlsext_status_type = -1;
}
}
-#ifndef OPENSSL_NO_HEARTBEATS
- else if (SSL_IS_DTLS(s) && type == TLSEXT_TYPE_heartbeat) {
- unsigned int hbtype;
-
- if (!PACKET_get_1(&extension, &hbtype)
- || PACKET_remaining(&extension)) {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- switch (hbtype) {
- case 0x01: /* Client allows us to send HB requests */
- s->tlsext_heartbeat |= SSL_DTLSEXT_HB_ENABLED;
- break;
- case 0x02: /* Client doesn't accept HB requests */
- s->tlsext_heartbeat |= SSL_DTLSEXT_HB_ENABLED;
- s->tlsext_heartbeat |= SSL_DTLSEXT_HB_DONT_SEND_REQUESTS;
- break;
- default:
- *al = SSL_AD_ILLEGAL_PARAMETER;
- return 0;
- }
- }
-#endif
#ifndef OPENSSL_NO_NEXTPROTONEG
- else if (type == TLSEXT_TYPE_next_proto_neg &&
- s->s3->tmp.finish_md_len == 0) {
+ else if (currext->type == TLSEXT_TYPE_next_proto_neg
+ && s->s3->tmp.finish_md_len == 0) {
/*-
* We shouldn't accept this extension on a
* renegotiation.
}
#endif
- else if (type == TLSEXT_TYPE_application_layer_protocol_negotiation &&
- s->s3->tmp.finish_md_len == 0) {
- if (!tls1_alpn_handle_client_hello(s, &extension, al))
+ else if (currext->type
+ == TLSEXT_TYPE_application_layer_protocol_negotiation
+ && s->s3->tmp.finish_md_len == 0) {
+ if (!tls1_alpn_handle_client_hello(s,
+ &currext->data, al))
return 0;
}
/* session ticket processed earlier */
#ifndef OPENSSL_NO_SRTP
else if (SSL_IS_DTLS(s) && SSL_get_srtp_profiles(s)
- && type == TLSEXT_TYPE_use_srtp) {
- if (ssl_parse_clienthello_use_srtp_ext(s, &extension, al))
+ && currext->type == TLSEXT_TYPE_use_srtp) {
+ if (ssl_parse_clienthello_use_srtp_ext(s,
+ &currext->data, al))
return 0;
}
#endif
- else if (type == TLSEXT_TYPE_encrypt_then_mac &&
- !(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC))
+ else if (currext->type == TLSEXT_TYPE_encrypt_then_mac
+ && !(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)) {
s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC;
+ } else if (currext->type == TLSEXT_TYPE_key_share
+ && s->version == TLS1_3_VERSION && !s->hit) {
+ unsigned int group_id;
+ PACKET key_share_list, encoded_pt;
+ const unsigned char *curves;
+ size_t num_curves;
+ int group_nid;
+ unsigned int curve_flags;
+
+ /* Sanity check */
+ if (s->s3->peer_tmp != NULL) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ if (!PACKET_as_length_prefixed_2(&currext->data, &key_share_list)) {
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT,
+ SSL_R_LENGTH_MISMATCH);
+ return 0;
+ }
+
+ while (PACKET_remaining(&key_share_list) > 0) {
+ if (!PACKET_get_net_2(&key_share_list, &group_id)
+ || !PACKET_get_length_prefixed_2(&key_share_list,
+ &encoded_pt)) {
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT,
+ SSL_R_LENGTH_MISMATCH);
+ return 0;
+ }
+
+ /* Check this share is in supported_groups */
+ if (!tls1_get_curvelist(s, 1, &curves, &num_curves)) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ if (!check_in_list(s, group_id, curves, num_curves, 0)) {
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT,
+ SSL_R_BAD_KEY_SHARE);
+ return 0;
+ }
+
+ /* Find a share that we can use */
+ if (!tls1_get_curvelist(s, 0, &curves, &num_curves)) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ if (!check_in_list(s, group_id, curves, num_curves, 1)) {
+ /* Share not suitable */
+ continue;
+ }
+
+ group_nid = tls1_ec_curve_id2nid(group_id, &curve_flags);
+
+ if (group_nid == 0) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT,
+ SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
+ return 0;
+ }
+
+ if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) {
+ /* Can happen for some curves, e.g. X25519 */
+ EVP_PKEY *key = EVP_PKEY_new();
+
+ if (key == NULL || !EVP_PKEY_set_type(key, group_nid)) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT, ERR_R_EVP_LIB);
+ EVP_PKEY_free(key);
+ return 0;
+ }
+ s->s3->peer_tmp = key;
+ } else {
+ /* Set up EVP_PKEY with named curve as parameters */
+ EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
+ if (pctx == NULL
+ || EVP_PKEY_paramgen_init(pctx) <= 0
+ || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx,
+ group_nid) <= 0
+ || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT, ERR_R_EVP_LIB);
+ EVP_PKEY_CTX_free(pctx);
+ return 0;
+ }
+ EVP_PKEY_CTX_free(pctx);
+ pctx = NULL;
+ }
+ s->s3->group_id = group_id;
+
+ if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp,
+ PACKET_data(&encoded_pt),
+ PACKET_remaining(&encoded_pt))) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT, SSL_R_BAD_ECPOINT);
+ return 0;
+ }
+ }
+ }
/*
* Note: extended master secret extension handled in
- * tls_check_serverhello_tlsext_early()
+ * tls_check_client_ems_support()
*/
/*
* ServerHello may be later returned.
*/
else if (!s->hit) {
- if (custom_ext_parse(s, 1, type, PACKET_data(&extension),
- PACKET_remaining(&extension), al) <= 0)
+ if (custom_ext_parse(s, 1, currext->type,
+ PACKET_data(&currext->data),
+ PACKET_remaining(&currext->data), al) <= 0)
return 0;
}
}
- if (PACKET_remaining(pkt) != 0) {
- /*
- * tls1_check_duplicate_extensions should ensure this never happens.
- */
- *al = SSL_AD_INTERNAL_ERROR;
- return 0;
- }
-
- ri_check:
-
/* Need RI if renegotiating */
if (!renegotiate_seen && s->renegotiate &&
return 1;
}
-int ssl_parse_clienthello_tlsext(SSL *s, PACKET *pkt)
+int ssl_parse_clienthello_tlsext(SSL *s, CLIENTHELLO_MSG *hello)
{
int al = -1;
custom_ext_init(&s->cert->srv_ext);
- if (ssl_scan_clienthello_tlsext(s, pkt, &al) <= 0) {
+ if (ssl_scan_clienthello_tlsext(s, hello, &al) <= 0) {
ssl3_send_alert(s, SSL3_AL_FATAL, al);
return 0;
}
OPENSSL_free(s->s3->alpn_selected);
s->s3->alpn_selected = NULL;
-#ifndef OPENSSL_NO_HEARTBEATS
- s->tlsext_heartbeat &= ~(SSL_DTLSEXT_HB_ENABLED |
- SSL_DTLSEXT_HB_DONT_SEND_REQUESTS);
-#endif
s->s3->flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC;
}
s->s3->alpn_selected_len = len;
}
-#ifndef OPENSSL_NO_HEARTBEATS
- else if (SSL_IS_DTLS(s) && type == TLSEXT_TYPE_heartbeat) {
- unsigned int hbtype;
- if (!PACKET_get_1(&spkt, &hbtype)) {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- switch (hbtype) {
- case 0x01: /* Server allows us to send HB requests */
- s->tlsext_heartbeat |= SSL_DTLSEXT_HB_ENABLED;
- break;
- case 0x02: /* Server doesn't accept HB requests */
- s->tlsext_heartbeat |= SSL_DTLSEXT_HB_ENABLED;
- s->tlsext_heartbeat |= SSL_DTLSEXT_HB_DONT_SEND_REQUESTS;
- break;
- default:
- *al = SSL_AD_ILLEGAL_PARAMETER;
- return 0;
- }
- }
-#endif
#ifndef OPENSSL_NO_SRTP
else if (SSL_IS_DTLS(s) && type == TLSEXT_TYPE_use_srtp) {
if (ssl_parse_serverhello_use_srtp_ext(s, &spkt, al))
s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD
&& s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4)
s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC;
- } else if (type == TLSEXT_TYPE_extended_master_secret) {
+ } else if (type == TLSEXT_TYPE_extended_master_secret &&
+ (SSL_IS_DTLS(s) || s->version < TLS1_3_VERSION)) {
s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS;
if (!s->hit)
s->session->flags |= SSL_SESS_FLAG_EXTMS;
- }
+ } else if (type == TLSEXT_TYPE_key_share
+ && s->version == TLS1_3_VERSION) {
+ unsigned int group_id;
+ PACKET encoded_pt;
+ EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL;
+
+ /* Sanity check */
+ if (ckey == NULL) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ if (!PACKET_get_net_2(&spkt, &group_id)) {
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT,
+ SSL_R_LENGTH_MISMATCH);
+ return 0;
+ }
+
+ if (group_id != s->s3->group_id) {
+ /*
+ * This isn't for the group that we sent in the original
+ * key_share!
+ */
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT,
+ SSL_R_BAD_KEY_SHARE);
+ return 0;
+ }
+
+ skey = ssl_generate_pkey(ckey);
+
+ if (!PACKET_as_length_prefixed_2(&spkt, &encoded_pt)) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT,
+ SSL_R_LENGTH_MISMATCH);
+ return 0;
+ }
+
+ if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt),
+ PACKET_remaining(&encoded_pt))) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT, SSL_R_BAD_ECPOINT);
+ return 0;
+ }
+
+ if (ssl_derive(s, ckey, skey, 1) == 0) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ EVP_PKEY_free(skey);
+ return 0;
+ }
+ EVP_PKEY_free(skey);
/*
* If this extension type was not otherwise handled, but matches a
* custom_cli_ext_record, then send it to the c callback
*/
- else if (custom_ext_parse(s, 0, type, data, size, al) <= 0)
+ } else if (custom_ext_parse(s, 0, type, data, size, al) <= 0)
return 0;
}
return 1;
}
-/*-
- * Since the server cache lookup is done early on in the processing of the
- * ClientHello and other operations depend on the result some extensions
- * need to be handled at the same time.
+/*
+ * Given a list of extensions that we collected earlier, find one of a given
+ * type and return it.
+ *
+ * |exts| is the set of extensions previously collected.
+ * |numexts| is the number of extensions that we have.
+ * |type| the type of the extension that we are looking for.
*
- * Two extensions are currently handled, session ticket and extended master
- * secret.
+ * Returns a pointer to the found RAW_EXTENSION data, or NULL if not found.
+ */
+RAW_EXTENSION *tls_get_extension_by_type(RAW_EXTENSION *exts, size_t numexts,
+ unsigned int type)
+{
+ size_t loop;
+
+ for (loop = 0; loop < numexts; loop++) {
+ if (exts[loop].type == type)
+ return &exts[loop];
+ }
+
+ return NULL;
+}
+
+/*-
+ * Gets the ticket information supplied by the client if any.
*
- * session_id: ClientHello session ID.
- * ext: ClientHello extensions (including length prefix)
+ * hello: The parsed ClientHello data
* ret: (output) on return, if a ticket was decrypted, then this is set to
* point to the resulting session.
*
* a session ticket or we couldn't use the one it gave us, or if
* s->ctx->tlsext_ticket_key_cb asked to renew the client's ticket.
* Otherwise, s->tlsext_ticket_expected is set to 0.
- *
- * For extended master secret flag is set if the extension is present.
- *
*/
-int tls_check_serverhello_tlsext_early(SSL *s, const PACKET *ext,
- const PACKET *session_id,
- SSL_SESSION **ret)
+int tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello,
+ SSL_SESSION **ret)
{
- unsigned int i;
- PACKET local_ext = *ext;
- int retv = -1;
-
- int have_ticket = 0;
- int use_ticket = tls_use_ticket(s);
+ int retv;
+ const unsigned char *etick;
+ size_t size;
+ RAW_EXTENSION *ticketext;
*ret = NULL;
s->tlsext_ticket_expected = 0;
- s->s3->flags &= ~TLS1_FLAGS_RECEIVED_EXTMS;
/*
* If tickets disabled behave as if no ticket present to permit stateful
* resumption.
*/
- if ((s->version <= SSL3_VERSION))
+ if (s->version <= SSL3_VERSION || !tls_use_ticket(s))
return 0;
- if (!PACKET_get_net_2(&local_ext, &i)) {
- retv = 0;
- goto end;
+ ticketext = tls_get_extension_by_type(hello->pre_proc_exts,
+ hello->num_extensions,
+ TLSEXT_TYPE_session_ticket);
+ if (ticketext == NULL)
+ return 0;
+
+ size = PACKET_remaining(&ticketext->data);
+ if (size == 0) {
+ /*
+ * The client will accept a ticket but doesn't currently have
+ * one.
+ */
+ s->tlsext_ticket_expected = 1;
+ return 1;
}
- while (PACKET_remaining(&local_ext) >= 4) {
- unsigned int type, size;
+ if (s->tls_session_secret_cb) {
+ /*
+ * Indicate that the ticket couldn't be decrypted rather than
+ * generating the session from ticket now, trigger
+ * abbreviated handshake based on external mechanism to
+ * calculate the master secret later.
+ */
+ return 2;
+ }
+ if (!PACKET_get_bytes(&ticketext->data, &etick, size)) {
+ /* Shouldn't ever happen */
+ return -1;
+ }
+ retv = tls_decrypt_ticket(s, etick, size, hello->session_id,
+ hello->session_id_len, ret);
+ switch (retv) {
+ case 2: /* ticket couldn't be decrypted */
+ s->tlsext_ticket_expected = 1;
+ return 2;
- if (!PACKET_get_net_2(&local_ext, &type)
- || !PACKET_get_net_2(&local_ext, &size)) {
- /* Shouldn't ever happen */
- retv = -1;
- goto end;
- }
- if (PACKET_remaining(&local_ext) < size) {
- retv = 0;
- goto end;
- }
- if (type == TLSEXT_TYPE_session_ticket && use_ticket) {
- int r;
- const unsigned char *etick;
+ case 3: /* ticket was decrypted */
+ return 3;
- /* Duplicate extension */
- if (have_ticket != 0) {
- retv = -1;
- goto end;
- }
- have_ticket = 1;
+ case 4: /* ticket decrypted but need to renew */
+ s->tlsext_ticket_expected = 1;
+ return 3;
- if (size == 0) {
- /*
- * The client will accept a ticket but doesn't currently have
- * one.
- */
- s->tlsext_ticket_expected = 1;
- retv = 1;
- continue;
- }
- if (s->tls_session_secret_cb) {
- /*
- * Indicate that the ticket couldn't be decrypted rather than
- * generating the session from ticket now, trigger
- * abbreviated handshake based on external mechanism to
- * calculate the master secret later.
- */
- retv = 2;
- continue;
- }
- if (!PACKET_get_bytes(&local_ext, &etick, size)) {
- /* Shouldn't ever happen */
- retv = -1;
- goto end;
- }
- r = tls_decrypt_ticket(s, etick, size, PACKET_data(session_id),
- PACKET_remaining(session_id), ret);
- switch (r) {
- case 2: /* ticket couldn't be decrypted */
- s->tlsext_ticket_expected = 1;
- retv = 2;
- break;
- case 3: /* ticket was decrypted */
- retv = r;
- break;
- case 4: /* ticket decrypted but need to renew */
- s->tlsext_ticket_expected = 1;
- retv = 3;
- break;
- default: /* fatal error */
- retv = -1;
- break;
- }
- continue;
- } else {
- if (type == TLSEXT_TYPE_extended_master_secret)
- s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS;
- if (!PACKET_forward(&local_ext, size)) {
- retv = -1;
- goto end;
- }
- }
+ default: /* fatal error */
+ return -1;
}
- if (have_ticket == 0)
- retv = 0;
- end:
- return retv;
+}
+
+/*
+ * Sets the extended master secret flag if the extension is present in the
+ * ClientHello and we can support it
+ * Returns:
+ * 1 on success
+ * 0 on error
+ */
+int tls_check_client_ems_support(SSL *s, const CLIENTHELLO_MSG *hello)
+{
+ RAW_EXTENSION *emsext;
+
+ s->s3->flags &= ~TLS1_FLAGS_RECEIVED_EXTMS;
+
+ if (!SSL_IS_DTLS(s) && (s->version < TLS1_VERSION
+ || s->version > TLS1_2_VERSION))
+ return 1;
+
+ emsext = tls_get_extension_by_type(hello->pre_proc_exts,
+ hello->num_extensions,
+ TLSEXT_TYPE_extended_master_secret);
+
+ /*
+ * No extensions is a success - we have successfully discovered that the
+ * client doesn't support EMS.
+ */
+ if (emsext == NULL)
+ return 1;
+
+ /* The extensions must always be empty */
+ if (PACKET_remaining(&emsext->data) != 0)
+ return 0;
+
+ s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS;
+
+ return 1;
}
/*-
SSL_SESSION *sess;
unsigned char *sdec;
const unsigned char *p;
- int slen, mlen, renew_ticket = 0, ret = -1;
+ int slen, renew_ticket = 0, ret = -1, declen;
+ size_t mlen;
unsigned char tick_hmac[EVP_MAX_MD_SIZE];
HMAC_CTX *hctx = NULL;
EVP_CIPHER_CTX *ctx;
* Attempt to process session ticket, first conduct sanity and integrity
* checks on ticket.
*/
- /* TODO(size_t) : convert me */
mlen = HMAC_size(hctx);
- if (mlen < 0) {
+ if (mlen == 0) {
goto err;
}
/* Sanity check ticket length: must exceed keyname + IV + HMAC */
if (eticklen <=
- TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx) + (size_t)mlen) {
+ TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx) + mlen) {
ret = 2;
goto err;
}
p = etick + 16 + EVP_CIPHER_CTX_iv_length(ctx);
eticklen -= 16 + EVP_CIPHER_CTX_iv_length(ctx);
sdec = OPENSSL_malloc(eticklen);
- if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p, eticklen) <= 0) {
+ if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p,
+ (int)eticklen) <= 0) {
EVP_CIPHER_CTX_free(ctx);
OPENSSL_free(sdec);
return -1;
}
- if (EVP_DecryptFinal(ctx, sdec + slen, &mlen) <= 0) {
+ if (EVP_DecryptFinal(ctx, sdec + slen, &declen) <= 0) {
EVP_CIPHER_CTX_free(ctx);
OPENSSL_free(sdec);
return 2;
}
- slen += mlen;
+ slen += declen;
EVP_CIPHER_CTX_free(ctx);
ctx = NULL;
p = sdec;
}
/* Given preference and allowed sigalgs set shared sigalgs */
-static int tls12_shared_sigalgs(SSL *s, TLS_SIGALGS *shsig,
- const unsigned char *pref, size_t preflen,
- const unsigned char *allow, size_t allowlen)
+static size_t tls12_shared_sigalgs(SSL *s, TLS_SIGALGS *shsig,
+ const unsigned char *pref, size_t preflen,
+ const unsigned char *allow, size_t allowlen)
{
const unsigned char *ptmp, *atmp;
size_t i, j, nmatch = 0;
unsigned char *rsig, unsigned char *rhash)
{
const unsigned char *psig = s->s3->tmp.peer_sigalgs;
- if (psig == NULL)
+ size_t numsigalgs = s->s3->tmp.peer_sigalgslen / 2;
+ if (psig == NULL || numsigalgs > INT_MAX)
return 0;
if (idx >= 0) {
idx <<= 1;
*rsig = psig[1];
tls1_lookup_sigalg(phash, psign, psignhash, psig);
}
- return s->s3->tmp.peer_sigalgslen / 2;
+ return (int)numsigalgs;
}
int SSL_get_shared_sigalgs(SSL *s, int idx,
unsigned char *rsig, unsigned char *rhash)
{
TLS_SIGALGS *shsigalgs = s->cert->shared_sigalgs;
- if (!shsigalgs || idx >= (int)s->cert->shared_sigalgslen)
+ if (!shsigalgs || idx >= (int)s->cert->shared_sigalgslen
+ || s->cert->shared_sigalgslen > INT_MAX)
return 0;
shsigalgs += idx;
if (phash)
*rsig = shsigalgs->rsign;
if (rhash)
*rhash = shsigalgs->rhash;
- return s->cert->shared_sigalgslen;
+ return (int)s->cert->shared_sigalgslen;
}
#define MAX_SIGALGLEN (TLSEXT_hash_num * TLSEXT_signature_num * 2)
/* idx == -2 means checking client certificate chains */
if (idx == -2) {
cpk = c->key;
- idx = cpk - c->pkeys;
+ idx = (int)(cpk - c->pkeys);
} else
cpk = c->pkeys + idx;
pvalid = s->s3->tmp.valid_flags + idx;
projects / openssl.git / blobdiff