New "i62" code for big integers with 64x64->128 opcodes; also improved "i31" modular...

[BearSSL] / src / rsa / rsa_i62_pkcs1_sign.c

diff --git a/src/rsa/rsa_i62_pkcs1_sign.c b/src/rsa/rsa_i62_pkcs1_sign.c
new file mode 100644 (file)
index 0000000..a20a084
--- /dev/null
+++ b/src/rsa/rsa_i62_pkcs1_sign.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2017 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"
+
+#if BR_INT128 || BR_UMUL128
+
+/* see bearssl_rsa.h */
+uint32_t
+br_rsa_i62_pkcs1_sign(const unsigned char *hash_oid,
+       const unsigned char *hash, size_t hash_len,
+       const br_rsa_private_key *sk, unsigned char *x)
+{
+       if (!br_rsa_pkcs1_sig_pad(hash_oid, hash, hash_len, sk->n_bitlen, x)) {
+               return 0;
+       }
+       return br_rsa_i62_private(x, sk);
+}
+
+/* see bearssl_rsa.h */
+br_rsa_pkcs1_sign
+br_rsa_i62_pkcs1_sign_get(void)
+{
+       return &br_rsa_i62_pkcs1_sign;
+}
+
+#else
+
+/* see bearssl_rsa.h */
+br_rsa_pkcs1_sign
+br_rsa_i62_pkcs1_sign_get(void)
+{
+       return 0;
+}
+
+#endif