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

[BearSSL] / src / ssl / ssl_ccert_single_rsa.c

diff --git a/src/ssl/ssl_ccert_single_rsa.c b/src/ssl/ssl_ccert_single_rsa.c
new file mode 100644 (file)
index 0000000..690df20
--- /dev/null
+++ b/src/ssl/ssl_ccert_single_rsa.c
@@ -0,0 +1,149 @@
+/*
+ * 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 void
+cc_none0(const br_ssl_client_certificate_class **pctx)
+{
+       (void)pctx;
+}
+
+static void
+cc_none1(const br_ssl_client_certificate_class **pctx, size_t len)
+{
+       (void)pctx;
+       (void)len;
+}
+
+static void
+cc_none2(const br_ssl_client_certificate_class **pctx,
+       const unsigned char *data, size_t len)
+{
+       (void)pctx;
+       (void)data;
+       (void)len;
+}
+
+static void
+cc_choose(const br_ssl_client_certificate_class **pctx,
+       const br_ssl_client_context *cc, uint32_t auth_types,
+       br_ssl_client_certificate *choices)
+{
+       br_ssl_client_certificate_rsa_context *zc;
+       int x;
+
+       (void)cc;
+       zc = (br_ssl_client_certificate_rsa_context *)pctx;
+       x = br_ssl_choose_hash((unsigned)auth_types);
+       if (x == 0 && (auth_types & 1) == 0) {
+               memset(choices, 0, sizeof *choices);
+       }
+       choices->auth_type = BR_AUTH_RSA;
+       choices->hash_id = x;
+       choices->chain = zc->chain;
+       choices->chain_len = zc->chain_len;
+}
+
+/*
+ * OID for hash functions in RSA signatures.
+ */
+static const unsigned char HASH_OID_SHA1[] = {
+       0x05, 0x2B, 0x0E, 0x03, 0x02, 0x1A
+};
+
+static const unsigned char HASH_OID_SHA224[] = {
+       0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04
+};
+
+static const unsigned char HASH_OID_SHA256[] = {
+       0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01
+};
+
+static const unsigned char HASH_OID_SHA384[] = {
+       0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02
+};
+
+static const unsigned char HASH_OID_SHA512[] = {
+       0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03
+};
+
+static const unsigned char *HASH_OID[] = {
+       HASH_OID_SHA1,
+       HASH_OID_SHA224,
+       HASH_OID_SHA256,
+       HASH_OID_SHA384,
+       HASH_OID_SHA512
+};
+
+static size_t
+cc_do_sign(const br_ssl_client_certificate_class **pctx,
+       int hash_id, size_t hv_len, unsigned char *data, size_t len)
+{
+       br_ssl_client_certificate_rsa_context *zc;
+       unsigned char hv[64];
+       const unsigned char *hash_oid;
+       size_t sig_len;
+
+       zc = (br_ssl_client_certificate_rsa_context *)pctx;
+       memcpy(hv, data, hv_len);
+       if (hash_id == 0) {
+               hash_oid = NULL;
+       } else if (hash_id >= 2 && hash_id <= 6) {
+               hash_oid = HASH_OID[hash_id - 2];
+       } else {
+               return 0;
+       }
+       sig_len = (zc->sk->n_bitlen + 7) >> 3;
+       if (len < sig_len) {
+               return 0;
+       }
+       return zc->irsasign(hash_oid, hv, hv_len, zc->sk, data) ? sig_len : 0;
+}
+
+static const br_ssl_client_certificate_class ccert_vtable = {
+       sizeof(br_ssl_client_certificate_rsa_context),
+       cc_none0, /* start_name_list */
+       cc_none1, /* start_name */
+       cc_none2, /* append_name */
+       cc_none0, /* end_name */
+       cc_none0, /* end_name_list */
+       cc_choose,
+       0,
+       cc_do_sign
+};
+
+/* see bearssl_ssl.h */
+void
+br_ssl_client_set_single_rsa(br_ssl_client_context *cc,
+       const br_x509_certificate *chain, size_t chain_len,
+       const br_rsa_private_key *sk, br_rsa_pkcs1_sign irsasign)
+{
+       cc->client_auth.single_rsa.vtable = &ccert_vtable;
+       cc->client_auth.single_rsa.chain = chain;
+       cc->client_auth.single_rsa.chain_len = chain_len;
+       cc->client_auth.single_rsa.sk = sk;
+       cc->client_auth.single_rsa.irsasign = irsasign;
+       cc->client_auth_vtable = &cc->client_auth.single_rsa.vtable;
+}