Additional rsa signing functions, using rsa_compute_root_tr.

1 files changed, 83 insertions, 0 deletions

diff --git a/rsa-sha512-sign-tr.c b/rsa-sha512-sign-tr.c
new file mode 100644
index 00000000..158b80f2
--- /dev/null
+++ b/rsa-sha512-sign-tr.c
@@ -0,0 +1,83 @@
+/* rsa-sha512-sign-tr.c
+
+   Signatures using RSA and SHA512.
+
+   Copyright (C) 2001, 2003, 2015 Niels Möller
+
+   This file is part of GNU Nettle.
+
+   GNU Nettle is free software: you can redistribute it and/or
+   modify it under the terms of either:
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at your
+       option) any later version.
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at your
+       option) any later version.
+
+   or both in parallel, as here.
+
+   GNU Nettle is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see http://www.gnu.org/licenses/.
+*/
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <assert.h>
+
+#include "rsa.h"
+
+#include "bignum.h"
+#include "pkcs1.h"
+
+int
+rsa_sha512_sign_tr(const struct rsa_public_key *pub,
+		   const struct rsa_private_key *key,
+		   void *random_ctx, nettle_random_func *random,
+		   struct sha512_ctx *hash,
+		   mpz_t s)
+{
+  mpz_t m;
+  int res;
+
+  mpz_init (m);
+  res = (pkcs1_rsa_sha512_encode(m, key->size, hash)
+	 && rsa_compute_root_tr (pub, key,
+				 random_ctx, random,
+				 s, m));
+  mpz_clear (m);
+  return res;
+}
+
+int
+rsa_sha512_sign_digest_tr(const struct rsa_public_key *pub,
+			  const struct rsa_private_key *key,
+			  void *random_ctx, nettle_random_func *random,
+			  const uint8_t *digest,
+			  mpz_t s)
+{
+  mpz_t m;
+  int res;
+
+  mpz_init (m);
+
+  res = (pkcs1_rsa_sha512_encode_digest(m, key->size, digest)
+	 && rsa_compute_root_tr (pub, key,
+				 random_ctx, random,
+				 s, m));
+
+  mpz_clear (m);
+  return res;
+}