*/
#include <assert.h>
+#include <openssl/ocsp.h>
#include "../ssl_locl.h"
#include "statem_locl.h"
+int tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, X509 *x,
+ size_t chainidx, int *al)
+{
+ /* Add RI if renegotiating */
+ if (!s->renegotiate)
+ return 1;
+
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate)
+ || !WPACKET_start_sub_packet_u16(pkt)
+ || !WPACKET_sub_memcpy_u8(pkt, s->s3->previous_client_finished,
+ s->s3->previous_client_finished_len)
+ || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+
+int tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, X509 *x,
+ size_t chainidx, int *al)
+{
+ if (s->tlsext_hostname == NULL)
+ return 1;
+
+ /* Add TLS extension servername to the Client Hello message */
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name)
+ /* Sub-packet for server_name extension */
+ || !WPACKET_start_sub_packet_u16(pkt)
+ /* Sub-packet for servername list (always 1 hostname)*/
+ || !WPACKET_start_sub_packet_u16(pkt)
+ || !WPACKET_put_bytes_u8(pkt, TLSEXT_NAMETYPE_host_name)
+ || !WPACKET_sub_memcpy_u16(pkt, s->tlsext_hostname,
+ strlen(s->tlsext_hostname))
+ || !WPACKET_close(pkt)
+ || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+
+#ifndef OPENSSL_NO_SRP
+int tls_construct_ctos_srp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
+{
+ /* Add SRP username if there is one */
+ if (s->srp_ctx.login == NULL)
+ return 1;
+
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp)
+ /* Sub-packet for SRP extension */
+ || !WPACKET_start_sub_packet_u16(pkt)
+ || !WPACKET_start_sub_packet_u8(pkt)
+ /* login must not be zero...internal error if so */
+ || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH)
+ || !WPACKET_memcpy(pkt, s->srp_ctx.login,
+ strlen(s->srp_ctx.login))
+ || !WPACKET_close(pkt)
+ || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SRP, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+#endif
+
+#ifndef OPENSSL_NO_EC
+static int use_ecc(SSL *s)
+{
+ int i, end;
+ unsigned long alg_k, alg_a;
+ STACK_OF(SSL_CIPHER) *cipher_stack = NULL;
+
+ /* See if we support any ECC ciphersuites */
+ if (s->version == SSL3_VERSION)
+ return 0;
+
+ cipher_stack = SSL_get_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_k = c->algorithm_mkey;
+ alg_a = c->algorithm_auth;
+ if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK))
+ || (alg_a & SSL_aECDSA)
+ || c->min_tls >= TLS1_3_VERSION)
+ break;
+ }
+
+ return i < end;
+}
+
+int tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, X509 *x,
+ size_t chainidx, int *al)
+{
+ const unsigned char *pformats;
+ size_t num_formats;
+
+ if (!use_ecc(s))
+ return 1;
+
+ /* Add TLS extension ECPointFormats to the ClientHello message */
+ tls1_get_formatlist(s, &pformats, &num_formats);
+
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats)
+ /* Sub-packet for formats extension */
+ || !WPACKET_start_sub_packet_u16(pkt)
+ || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats)
+ || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+
+int tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, X509 *x,
+ size_t chainidx, int *al)
+{
+ const unsigned char *pcurves = NULL, *pcurvestmp;
+ size_t num_curves = 0, i;
+
+ if (!use_ecc(s))
+ return 1;
+
+ /*
+ * Add TLS extension supported_groups to the ClientHello message
+ */
+ /* TODO(TLS1.3): Add support for DHE groups */
+ pcurves = s->tlsext_supportedgroupslist;
+ if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ pcurvestmp = pcurves;
+
+ 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_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ /* Copy curve ID if supported */
+ 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, pcurvestmp[0])
+ || !WPACKET_put_bytes_u8(pkt, pcurvestmp[1])) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ }
+ }
+ if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+#endif
+
+int tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, X509 *x,
+ size_t chainidx, int *al)
+{
+ size_t ticklen;
+
+ if (!tls_use_ticket(s))
+ return 1;
+
+ if (!s->new_session && s->session != NULL
+ && s->session->tlsext_tick != NULL) {
+ ticklen = s->session->tlsext_ticklen;
+ } else if (s->session && s->tlsext_session_ticket != NULL
+ && s->tlsext_session_ticket->data != NULL) {
+ ticklen = s->tlsext_session_ticket->length;
+ s->session->tlsext_tick = OPENSSL_malloc(ticklen);
+ if (s->session->tlsext_tick == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ memcpy(s->session->tlsext_tick,
+ s->tlsext_session_ticket->data, ticklen);
+ s->session->tlsext_ticklen = ticklen;
+ } else {
+ ticklen = 0;
+ }
+
+ if (ticklen == 0 && s->tlsext_session_ticket != NULL &&
+ s->tlsext_session_ticket->data == NULL)
+ return 1;
+
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket)
+ || !WPACKET_sub_memcpy_u16(pkt, s->session->tlsext_tick, ticklen)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+
+int tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
+{
+ size_t salglen;
+ const unsigned char *salg;
+
+ if (!SSL_CLIENT_USE_SIGALGS(s))
+ return 1;
+
+ salglen = tls12_get_psigalgs(s, &salg);
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms)
+ /* Sub-packet for sig-algs extension */
+ || !WPACKET_start_sub_packet_u16(pkt)
+ /* Sub-packet for the actual list */
+ || !WPACKET_start_sub_packet_u16(pkt)
+ || !tls12_copy_sigalgs(s, pkt, salg, salglen)
+ || !WPACKET_close(pkt)
+ || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+
+#ifndef OPENSSL_NO_OCSP
+int tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, X509 *x,
+ size_t chainidx, int *al)
+{
+ int i;
+
+ /* This extension isn't defined for client Certificates */
+ if (x != NULL)
+ return 1;
+
+ if (s->tlsext_status_type != TLSEXT_STATUSTYPE_ocsp)
+ return 1;
+
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request)
+ /* Sub-packet for status request extension */
+ || !WPACKET_start_sub_packet_u16(pkt)
+ || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp)
+ /* Sub-packet for the ids */
+ || !WPACKET_start_sub_packet_u16(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) {
+ unsigned char *idbytes;
+ OCSP_RESPID *id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
+ int idlen = i2d_OCSP_RESPID(id, NULL);
+
+ if (idlen <= 0
+ /* Sub-packet for an individual id */
+ || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes)
+ || i2d_OCSP_RESPID(id, &idbytes) != idlen) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ }
+ if (!WPACKET_close(pkt)
+ || !WPACKET_start_sub_packet_u16(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ if (s->tlsext_ocsp_exts) {
+ unsigned char *extbytes;
+ int extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
+
+ if (extlen < 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes)
+ || i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &extbytes)
+ != extlen) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ }
+ if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+#endif
+
+#ifndef OPENSSL_NO_NEXTPROTONEG
+int tls_construct_ctos_npn(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
+{
+ if (s->ctx->next_proto_select_cb == NULL || s->s3->tmp.finish_md_len != 0)
+ return 1;
+
+ /*
+ * The client advertises an empty extension to indicate its support
+ * for Next Protocol Negotiation
+ */
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg)
+ || !WPACKET_put_bytes_u16(pkt, 0)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+#endif
+
+int tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
+{
+ s->s3->alpn_sent = 0;
+
+ /*
+ * finish_md_len is non-zero during a renegotiation, so
+ * this avoids sending ALPN during the renegotiation
+ */
+ if (s->alpn_client_proto_list == NULL || s->s3->tmp.finish_md_len != 0)
+ return 1;
+
+ if (!WPACKET_put_bytes_u16(pkt,
+ TLSEXT_TYPE_application_layer_protocol_negotiation)
+ /* Sub-packet ALPN extension */
+ || !WPACKET_start_sub_packet_u16(pkt)
+ || !WPACKET_sub_memcpy_u16(pkt, s->alpn_client_proto_list,
+ s->alpn_client_proto_list_len)
+ || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ s->s3->alpn_sent = 1;
+
+ return 1;
+}
+
+
+#ifndef OPENSSL_NO_SRTP
+int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
+{
+ STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s);
+ int i, end;
+
+ if (clnt == NULL)
+ return 1;
+
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp)
+ /* Sub-packet for SRTP extension */
+ || !WPACKET_start_sub_packet_u16(pkt)
+ /* Sub-packet for the protection profile list */
+ || !WPACKET_start_sub_packet_u16(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ end = sk_SRTP_PROTECTION_PROFILE_num(clnt);
+ for (i = 0; i < end; i++) {
+ const SRTP_PROTECTION_PROFILE *prof =
+ sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
+
+ if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ }
+ if (!WPACKET_close(pkt)
+ /* Add an empty use_mki value */
+ || !WPACKET_put_bytes_u8(pkt, 0)
+ || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+#endif
+
+int tls_construct_ctos_etm(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
+{
+ if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
+ return 1;
+
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac)
+ || !WPACKET_put_bytes_u16(pkt, 0)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+
+#ifndef OPENSSL_NO_CT
+int tls_construct_ctos_sct(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
+{
+ if (s->ct_validation_callback == NULL)
+ return 1;
+
+ /* Not defined for client Certificates */
+ if (x != NULL)
+ return 1;
+
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp)
+ || !WPACKET_put_bytes_u16(pkt, 0)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+#endif
+
+int tls_construct_ctos_ems(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
+{
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret)
+ || !WPACKET_put_bytes_u16(pkt, 0)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+
+int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, X509 *x,
+ size_t chainidx, int *al)
+{
+ int currv, min_version, max_version, reason;
+
+ 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_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ reason = ssl_get_client_min_max_version(s, &min_version, &max_version);
+ if (reason != 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, 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_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ } else if (!WPACKET_put_bytes_u16(pkt, currv)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ }
+ if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+
+int tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
+{
+#ifndef OPENSSL_NO_TLS1_3
+ size_t i, sharessent = 0, num_curves = 0;
+ const unsigned char *pcurves = NULL;
+
+ /* 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_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ pcurves = s->tlsext_supportedgroupslist;
+ if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, 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) {
+ unsigned char *encodedPoint = NULL;
+ unsigned int curve_id = 0;
+ EVP_PKEY *key_share_key = NULL;
+ size_t encodedlen;
+
+ if (!tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED))
+ continue;
+
+ if (s->s3->tmp.pkey != NULL) {
+ /* Shouldn't happen! */
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, 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_TLS_CONSTRUCT_CTOS_KEY_SHARE, 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_TLS_CONSTRUCT_CTOS_KEY_SHARE, 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_TLS_CONSTRUCT_CTOS_KEY_SHARE, 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_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+#endif
+
+ return 1;
+}
+
+#define F5_WORKAROUND_MIN_MSG_LEN 0xff
+#define F5_WORKAROUND_MAX_MSG_LEN 0x200
+
+int tls_construct_ctos_padding(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
+{
+ unsigned char *padbytes;
+ size_t hlen;
+
+ if ((s->options & SSL_OP_TLSEXT_PADDING) == 0)
+ return 1;
+
+ /*
+ * Add padding to workaround bugs in F5 terminators. See
+ * https://tools.ietf.org/html/draft-agl-tls-padding-03 NB: because this
+ * code calculates the length of all existing extensions it MUST always
+ * appear last.
+ */
+ if (!WPACKET_get_total_written(pkt, &hlen)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) {
+ /* Calculate the amond of padding we need to add */
+ hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen;
+
+ /*
+ * Take off the size of extension header itself (2 bytes for type and
+ * 2 bytes for length bytes)
+ */
+ if (hlen >= 4)
+ hlen -= 4;
+ else
+ hlen = 0;
+
+ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding)
+ || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ memset(padbytes, 0, hlen);
+ }
+
+ return 1;
+}
+
/*
* Parse the server's renegotiation binding and abort if it's not right
*/
-int tls_parse_server_renegotiate(SSL *s, PACKET *pkt, int *al)
+int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
{
size_t expected_len = s->s3->previous_client_finished_len
+ s->s3->previous_server_finished_len;
/* Parse the length byte */
if (!PACKET_get_1_len(pkt, &ilen)) {
- SSLerr(SSL_F_TLS_PARSE_SERVER_RENEGOTIATE,
+ SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
SSL_R_RENEGOTIATION_ENCODING_ERR);
*al = SSL_AD_ILLEGAL_PARAMETER;
return 0;
/* Consistency check */
if (PACKET_remaining(pkt) != ilen) {
- SSLerr(SSL_F_TLS_PARSE_SERVER_RENEGOTIATE,
+ SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
SSL_R_RENEGOTIATION_ENCODING_ERR);
*al = SSL_AD_ILLEGAL_PARAMETER;
return 0;
/* Check that the extension matches */
if (ilen != expected_len) {
- SSLerr(SSL_F_TLS_PARSE_SERVER_RENEGOTIATE,
+ SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
SSL_R_RENEGOTIATION_MISMATCH);
*al = SSL_AD_HANDSHAKE_FAILURE;
return 0;
if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len)
|| memcmp(data, s->s3->previous_client_finished,
s->s3->previous_client_finished_len) != 0) {
- SSLerr(SSL_F_TLS_PARSE_SERVER_RENEGOTIATE,
+ SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
SSL_R_RENEGOTIATION_MISMATCH);
*al = SSL_AD_HANDSHAKE_FAILURE;
return 0;
if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len)
|| memcmp(data, s->s3->previous_server_finished,
s->s3->previous_server_finished_len) != 0) {
- SSLerr(SSL_F_TLS_PARSE_SERVER_RENEGOTIATE,
+ SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
SSL_R_RENEGOTIATION_MISMATCH);
*al = SSL_AD_ILLEGAL_PARAMETER;
return 0;
return 1;
}
-int tls_parse_server_server_name(SSL *s, PACKET *pkt, int *al)
+int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
{
if (s->tlsext_hostname == NULL || PACKET_remaining(pkt) > 0) {
*al = SSL_AD_UNRECOGNIZED_NAME;
}
#ifndef OPENSSL_NO_EC
-int tls_parse_server_ec_pt_formats(SSL *s, PACKET *pkt, int *al)
+int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
{
unsigned int ecpointformatlist_length;
PACKET ecptformatlist;
}
#endif
-int tls_parse_server_session_ticket(SSL *s, PACKET *pkt, int *al)
+int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
{
- if (s->tls_session_ticket_ext_cb &&
+ if (s->tls_session_ticket_ext_cb != NULL &&
!s->tls_session_ticket_ext_cb(s, PACKET_data(pkt),
PACKET_remaining(pkt),
s->tls_session_ticket_ext_cb_arg)) {
*al = SSL_AD_INTERNAL_ERROR;
return 0;
}
+
if (!tls_use_ticket(s) || PACKET_remaining(pkt) > 0) {
*al = SSL_AD_UNSUPPORTED_EXTENSION;
return 0;
}
+
s->tlsext_ticket_expected = 1;
return 1;
}
-int tls_parse_server_status_request(SSL *s, PACKET *pkt, int *al)
+#ifndef OPENSSL_NO_OCSP
+int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
{
/*
- * MUST be empty and only sent if we've requested a status
- * request message.
+ * MUST only be sent if we've requested a status
+ * request message. In TLS <= 1.2 it must also be empty.
*/
- if (s->tlsext_status_type == -1 || PACKET_remaining(pkt) > 0) {
+ if (s->tlsext_status_type == TLSEXT_STATUSTYPE_nothing
+ || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0)) {
*al = SSL_AD_UNSUPPORTED_EXTENSION;
return 0;
}
+
+ if (SSL_IS_TLS13(s)) {
+ /* We only know how to handle this if it's for the first Certificate in
+ * the chain. We ignore any other repsonses.
+ */
+ if (chainidx != 0)
+ return 1;
+ return tls_process_cert_status_body(s, pkt, al);
+ }
+
/* Set flag to expect CertificateStatus message */
s->tlsext_status_expected = 1;
return 1;
}
+#endif
#ifndef OPENSSL_NO_CT
-int tls_parse_server_sct(SSL *s, PACKET *pkt, int *al)
+int tls_parse_stoc_sct(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
{
/*
* Only take it if we asked for it - i.e if there is no CT validation
size_t size = PACKET_remaining(pkt);
/* Simply copy it off for later processing */
- if (s->tlsext_scts != NULL) {
- OPENSSL_free(s->tlsext_scts);
- s->tlsext_scts = NULL;
- }
+ OPENSSL_free(s->tlsext_scts);
+ s->tlsext_scts = NULL;
+
s->tlsext_scts_len = size;
if (size > 0) {
s->tlsext_scts = OPENSSL_malloc(size);
return 1;
}
-int tls_parse_server_npn(SSL *s, PACKET *pkt, int *al)
+int tls_parse_stoc_npn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
{
unsigned char *selected;
unsigned char selected_len;
PACKET tmppkt;
+ /* Check if we are in a renegotiation. If so ignore this extension */
if (s->s3->tmp.finish_md_len != 0)
return 1;
*al = SSL_AD_UNSUPPORTED_EXTENSION;
return 0;
}
+
/* The data must be valid */
tmppkt = *pkt;
if (!ssl_next_proto_validate(&tmppkt)) {
*al = SSL_AD_INTERNAL_ERROR;
return 0;
}
+
/*
* Could be non-NULL if server has sent multiple NPN extensions in
* a single Serverhello
}
#endif
-int tls_parse_server_alpn(SSL *s, PACKET *pkt, int *al)
+int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
{
size_t len;
}
#ifndef OPENSSL_NO_SRTP
-int tls_parse_server_use_srtp(SSL *s, PACKET *pkt, int *al)
+int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
{
unsigned int id, ct, mki;
int i;
STACK_OF(SRTP_PROTECTION_PROFILE) *clnt;
SRTP_PROTECTION_PROFILE *prof;
- if (!PACKET_get_net_2(pkt, &ct)
- || ct != 2 || !PACKET_get_net_2(pkt, &id)
- || !PACKET_get_1(pkt, &mki)
- || PACKET_remaining(pkt) != 0) {
- SSLerr(SSL_F_TLS_PARSE_SERVER_USE_SRTP,
+ if (!PACKET_get_net_2(pkt, &ct) || ct != 2
+ || !PACKET_get_net_2(pkt, &id)
+ || !PACKET_get_1(pkt, &mki)
+ || PACKET_remaining(pkt) != 0) {
+ SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP,
SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
*al = SSL_AD_DECODE_ERROR;
return 0;
if (mki != 0) {
/* Must be no MKI, since we never offer one */
- SSLerr(SSL_F_TLS_PARSE_SERVER_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE);
+ SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE);
*al = SSL_AD_ILLEGAL_PARAMETER;
return 0;
}
- clnt = SSL_get_srtp_profiles(s);
-
/* Throw an error if the server gave us an unsolicited extension */
+ clnt = SSL_get_srtp_profiles(s);
if (clnt == NULL) {
- SSLerr(SSL_F_TLS_PARSE_SERVER_USE_SRTP, SSL_R_NO_SRTP_PROFILES);
+ SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES);
*al = SSL_AD_DECODE_ERROR;
return 0;
}
}
}
- SSLerr(SSL_F_TLS_PARSE_SERVER_USE_SRTP,
+ SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP,
SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
*al = SSL_AD_DECODE_ERROR;
return 0;
}
#endif
-int tls_parse_server_etm(SSL *s, PACKET *pkt, int *al)
+int tls_parse_stoc_etm(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
{
/* Ignore if inappropriate ciphersuite */
if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
return 1;
}
-int tls_parse_server_ems(SSL *s, PACKET *pkt, int *al)
+int tls_parse_stoc_ems(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
{
s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS;
if (!s->hit)
return 1;
}
-int tls_parse_server_key_share(SSL *s, PACKET *pkt, int *al)
+int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
+ int *al)
{
+#ifndef OPENSSL_NO_TLS1_3
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_TLS_PARSE_SERVER_KEY_SHARE, ERR_R_INTERNAL_ERROR);
+ SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
return 0;
}
if (!PACKET_get_net_2(pkt, &group_id)) {
*al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PARSE_SERVER_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
+ SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
return 0;
}
* key_share!
*/
*al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PARSE_SERVER_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
+ SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
return 0;
}
if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt)
|| PACKET_remaining(&encoded_pt) == 0) {
*al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PARSE_SERVER_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
+ SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
return 0;
}
skey = ssl_generate_pkey(ckey);
if (skey == NULL) {
*al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PARSE_SERVER_KEY_SHARE, ERR_R_MALLOC_FAILURE);
+ SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE);
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_TLS_PARSE_SERVER_KEY_SHARE, SSL_R_BAD_ECPOINT);
+ SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT);
+ EVP_PKEY_free(skey);
return 0;
}
if (ssl_derive(s, ckey, skey, 1) == 0) {
*al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PARSE_SERVER_KEY_SHARE, ERR_R_INTERNAL_ERROR);
+ SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
EVP_PKEY_free(skey);
return 0;
}
EVP_PKEY_free(skey);
-
- return 1;
-}
-
-static int ssl_scan_serverhello_tlsext(SSL *s, PACKET *pkt, int *al)
-{
- size_t num_extensions = 0;
- RAW_EXTENSION *extensions = NULL;
- PACKET extpkt;
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
- s->s3->next_proto_neg_seen = 0;
#endif
- s->tlsext_ticket_expected = 0;
-
- OPENSSL_free(s->s3->alpn_selected);
- s->s3->alpn_selected = NULL;
-
- s->s3->flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC;
-
- s->s3->flags &= ~TLS1_FLAGS_RECEIVED_EXTMS;
- if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) {
- /* Extensions block may be completely absent in SSLv3 */
- if (s->version != SSL3_VERSION || PACKET_remaining(pkt) != 0) {
- *al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT, SSL_R_BAD_LENGTH);
- return 0;
- }
- PACKET_null_init(&extpkt);
- }
-
- /*
- * TODO(TLS1.3): We give multiple contexts for now until we're ready to
- * give something more specific
- */
-
- if (!tls_collect_extensions(s, &extpkt, EXT_TLS1_2_SERVER_HELLO
- | EXT_TLS1_3_SERVER_HELLO
- | EXT_TLS1_3_ENCRYPTED_EXTENSIONS
- | EXT_TLS1_3_CERTIFICATE,
- &extensions, &num_extensions, al))
- return 0;
-
- /*
- * Determine if we need to see RI. Strictly speaking if we want to avoid
- * an attack we should *always* see RI even on initial server hello
- * because the client doesn't see any renegotiation during an attack.
- * However this would mean we could not connect to any server which
- * doesn't support RI so for the immediate future tolerate RI absence
- */
- if (!(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
- && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)
- && tls_get_extension_by_type(extensions, num_extensions,
- TLSEXT_TYPE_renegotiate) == NULL) {
- *al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT,
- SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
- return 0;
- }
-
- if (!tls_parse_all_extensions(s, EXT_TLS1_2_SERVER_HELLO
- | EXT_TLS1_3_SERVER_HELLO
- | EXT_TLS1_3_ENCRYPTED_EXTENSIONS
- | EXT_TLS1_3_CERTIFICATE,
- extensions, num_extensions, al))
- return 0;
-
- if (s->hit) {
- /*
- * Check extended master secret extension is consistent with
- * original session.
- */
- if (!(s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) !=
- !(s->session->flags & SSL_SESS_FLAG_EXTMS)) {
- *al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT, SSL_R_INCONSISTENT_EXTMS);
- return 0;
- }
- }
-
- return 1;
-}
-
-static int ssl_check_serverhello_tlsext(SSL *s)
-{
- int ret = SSL_TLSEXT_ERR_NOACK;
- int al = SSL_AD_UNRECOGNIZED_NAME;
-
-#ifndef OPENSSL_NO_EC
- /*
- * If we are client and using an elliptic curve cryptography cipher
- * suite, then if server returns an EC point formats lists extension it
- * must contain uncompressed.
- */
- unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
- unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
- if ((s->tlsext_ecpointformatlist != NULL)
- && (s->tlsext_ecpointformatlist_length > 0)
- && (s->session->tlsext_ecpointformatlist != NULL)
- && (s->session->tlsext_ecpointformatlist_length > 0)
- && ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA))) {
- /* we are using an ECC cipher */
- size_t i;
- unsigned char *list;
- int found_uncompressed = 0;
- list = s->session->tlsext_ecpointformatlist;
- for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++) {
- if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed) {
- found_uncompressed = 1;
- break;
- }
- }
- if (!found_uncompressed) {
- SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,
- SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
- return -1;
- }
- }
- ret = SSL_TLSEXT_ERR_OK;
-#endif /* OPENSSL_NO_EC */
-
- if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
- ret =
- s->ctx->tlsext_servername_callback(s, &al,
- s->ctx->tlsext_servername_arg);
- else if (s->initial_ctx != NULL
- && s->initial_ctx->tlsext_servername_callback != 0)
- ret =
- s->initial_ctx->tlsext_servername_callback(s, &al,
- s->
- initial_ctx->tlsext_servername_arg);
-
- /*
- * Ensure we get sensible values passed to tlsext_status_cb in the event
- * that we don't receive a status message
- */
- OPENSSL_free(s->tlsext_ocsp_resp);
- s->tlsext_ocsp_resp = NULL;
- s->tlsext_ocsp_resplen = 0;
-
- switch (ret) {
- case SSL_TLSEXT_ERR_ALERT_FATAL:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- return -1;
-
- case SSL_TLSEXT_ERR_ALERT_WARNING:
- ssl3_send_alert(s, SSL3_AL_WARNING, al);
- return 1;
-
- case SSL_TLSEXT_ERR_NOACK:
- s->servername_done = 0;
- default:
- return 1;
- }
-}
-
-int ssl_parse_serverhello_tlsext(SSL *s, PACKET *pkt)
-{
- int al = -1;
- if (s->version < SSL3_VERSION)
- return 1;
- if (ssl_scan_serverhello_tlsext(s, pkt, &al) <= 0) {
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- return 0;
- }
-
- if (ssl_check_serverhello_tlsext(s) <= 0) {
- SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT, SSL_R_SERVERHELLO_TLSEXT);
- return 0;
- }
return 1;
}