General pkcs1 signature interface.

1 files changed, 50 insertions, 0 deletions

diff --git a/rsa-pkcs1-verify.c b/rsa-pkcs1-verify.c
new file mode 100644
index 00000000..4b25aaf3
--- /dev/null
+++ b/rsa-pkcs1-verify.c
@@ -0,0 +1,50 @@
+/* rsa-pkcs1-sign.c
+ *
+ * PKCS#1 version 1.5 signatures.
+ */
+
+/* nettle, low-level cryptographics library
+ *
+ * Copyright (C) 2012 Niels Möller
+ *  
+ * The nettle library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ * 
+ * The nettle library 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 Lesser General Public
+ * License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the nettle library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "rsa.h"
+
+#include "pkcs1.h"
+
+int
+rsa_pkcs1_verify(const struct rsa_public_key *key,
+		 unsigned length, const uint8_t *digest_info,
+		 const mpz_t s)
+{
+  int res;
+  mpz_t m;
+
+  mpz_init (m);
+
+  res = (pkcs1_rsa_digest_encode (m, key->size, length, digest_info)
+	 && _rsa_verify (key, m, s));
+
+  mpz_clear(m);
+
+  return res;
+}