Initial import.

src/ssl/ssl_single_rsa.c

@@ -0,0 +1,155 @@
+/*
+ * 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
+sr_choose(const br_ssl_server_policy_class **pctx,
+	const br_ssl_server_context *cc,
+	br_ssl_server_choices *choices)
+{
+	br_ssl_server_policy_rsa_context *pc;
+	const br_suite_translated *st;
+	size_t u, st_num;
+	int hash_id;
+
+	pc = (br_ssl_server_policy_rsa_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));
+	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_RSA:
+			if ((pc->allowed_usages & BR_KEYTYPE_KEYX) != 0) {
+				choices->cipher_suite = st[u][0];
+				return 1;
+			}
+			break;
+		case BR_SSLKEYX_ECDHE_RSA:
+			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
+sr_do_keyx(const br_ssl_server_policy_class **pctx,
+	unsigned char *data, size_t len)
+{
+	br_ssl_server_policy_rsa_context *pc;
+
+	pc = (br_ssl_server_policy_rsa_context *)pctx;
+	return br_rsa_ssl_decrypt(pc->irsacore, pc->sk, data, 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
+sr_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_rsa_context *pc;
+	unsigned char hv[64];
+	size_t sig_len;
+	const unsigned char *hash_oid;
+
+	pc = (br_ssl_server_policy_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 = (pc->sk->n_bitlen + 7) >> 3;
+	if (len < sig_len) {
+		return 0;
+	}
+	return pc->irsasign(hash_oid, hv, hv_len, pc->sk, data) ? sig_len : 0;
+}
+
+static const br_ssl_server_policy_class sr_policy_vtable = {
+	sizeof(br_ssl_server_policy_rsa_context),
+	sr_choose,
+	sr_do_keyx,
+	sr_do_sign
+};
+
+/* see bearssl_ssl.h */
+void
+br_ssl_server_set_single_rsa(br_ssl_server_context *cc,
+	const br_x509_certificate *chain, size_t chain_len,
+	const br_rsa_private_key *sk, unsigned allowed_usages,
+	br_rsa_private irsacore, br_rsa_pkcs1_sign irsasign)
+{
+	cc->chain_handler.single_rsa.vtable = &sr_policy_vtable;
+	cc->chain_handler.single_rsa.chain = chain;
+	cc->chain_handler.single_rsa.chain_len = chain_len;
+	cc->chain_handler.single_rsa.sk = sk;
+	cc->chain_handler.single_rsa.allowed_usages = allowed_usages;
+	cc->chain_handler.single_rsa.irsacore = irsacore;
+	cc->chain_handler.single_rsa.irsasign = irsasign;
+	cc->policy_vtable = &cc->chain_handler.single_rsa.vtable;
+}