Added support for client certificates (both client-side and server-side, but still...

[BearSSL] / src / ssl / ssl_scert_single_ec.c

diff --git a/src/ssl/ssl_scert_single_ec.c b/src/ssl/ssl_scert_single_ec.c
new file mode 100644 (file)
index 0000000..2648670
--- /dev/null
+++ b/src/ssl/ssl_scert_single_ec.c
@@ -0,0 +1,135 @@
+/*
+ * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining 
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be 
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "inner.h"
+
+static int
+se_choose(const br_ssl_server_policy_class **pctx,
+       const br_ssl_server_context *cc,
+       br_ssl_server_choices *choices)
+{
+       br_ssl_server_policy_ec_context *pc;
+       const br_suite_translated *st;
+       size_t u, st_num;
+       int hash_id;
+
+       pc = (br_ssl_server_policy_ec_context *)pctx;
+       st = br_ssl_server_get_client_suites(cc, &st_num);
+       hash_id = br_ssl_choose_hash(br_ssl_server_get_client_hashes(cc) >> 8);
+       if (cc->eng.session.version < BR_TLS12) {
+               hash_id = br_sha1_ID;
+       }
+       choices->chain = pc->chain;
+       choices->chain_len = pc->chain_len;
+       for (u = 0; u < st_num; u ++) {
+               unsigned tt;
+
+               tt = st[u][1];
+               switch (tt >> 12) {
+               case BR_SSLKEYX_ECDH_RSA:
+                       if ((pc->allowed_usages & BR_KEYTYPE_KEYX) != 0
+                               && pc->cert_issuer_key_type == BR_KEYTYPE_RSA)
+                       {
+                               choices->cipher_suite = st[u][0];
+                               return 1;
+                       }
+                       break;
+               case BR_SSLKEYX_ECDH_ECDSA:
+                       if ((pc->allowed_usages & BR_KEYTYPE_KEYX) != 0
+                               && pc->cert_issuer_key_type == BR_KEYTYPE_EC)
+                       {
+                               choices->cipher_suite = st[u][0];
+                               return 1;
+                       }
+                       break;
+               case BR_SSLKEYX_ECDHE_ECDSA:
+                       if ((pc->allowed_usages & BR_KEYTYPE_SIGN) != 0
+                               && hash_id != 0)
+                       {
+                               choices->cipher_suite = st[u][0];
+                               choices->hash_id = hash_id;
+                               return 1;
+                       }
+                       break;
+               }
+       }
+       return 0;
+}
+
+static uint32_t
+se_do_keyx(const br_ssl_server_policy_class **pctx,
+       unsigned char *data, size_t len)
+{
+       br_ssl_server_policy_ec_context *pc;
+
+       pc = (br_ssl_server_policy_ec_context *)pctx;
+       return pc->iec->mul(data, len, pc->sk->x, pc->sk->xlen, pc->sk->curve);
+}
+
+static size_t
+se_do_sign(const br_ssl_server_policy_class **pctx,
+       int hash_id, size_t hv_len, unsigned char *data, size_t len)
+{
+       br_ssl_server_policy_ec_context *pc;
+       unsigned char hv[64];
+       const br_hash_class *hc;
+
+       pc = (br_ssl_server_policy_ec_context *)pctx;
+       hc = br_multihash_getimpl(pc->mhash, hash_id);
+       if (hc == NULL) {
+               return 0;
+       }
+       memcpy(hv, data, hv_len);
+       if (len < 139) {
+               return 0;
+       }
+       return pc->iecdsa(pc->iec, hc, hv, pc->sk, data);
+}
+
+static const br_ssl_server_policy_class se_policy_vtable = {
+       sizeof(br_ssl_server_policy_ec_context),
+       se_choose,
+       se_do_keyx,
+       se_do_sign
+};
+
+/* see bearssl_ssl.h */
+void
+br_ssl_server_set_single_ec(br_ssl_server_context *cc,
+       const br_x509_certificate *chain, size_t chain_len,
+       const br_ec_private_key *sk, unsigned allowed_usages,
+       unsigned cert_issuer_key_type,
+       const br_ec_impl *iec, br_ecdsa_sign iecdsa)
+{
+       cc->chain_handler.single_ec.vtable = &se_policy_vtable;
+       cc->chain_handler.single_ec.chain = chain;
+       cc->chain_handler.single_ec.chain_len = chain_len;
+       cc->chain_handler.single_ec.sk = sk;
+       cc->chain_handler.single_ec.allowed_usages = allowed_usages;
+       cc->chain_handler.single_ec.cert_issuer_key_type = cert_issuer_key_type;
+       cc->chain_handler.single_ec.mhash = &cc->eng.mhash;
+       cc->chain_handler.single_ec.iec = iec;
+       cc->chain_handler.single_ec.iecdsa = iecdsa;
+       cc->policy_vtable = &cc->chain_handler.single_ec.vtable;
+}