1 files changed, 79 insertions, 0 deletions
diff --git a/external/nettle-3.3/nettle/rsa-sha256-verify.c b/external/nettle-3.3/nettle/rsa-sha256-verify.c
new file mode 100644
index 0000000..33ecbc1
--- /dev/null
+++ b/external/nettle-3.3/nettle/rsa-sha256-verify.c
@@ -0,0 +1,79 @@
+/* rsa-sha256-verify.c
+
+   Verifying signatures created with RSA and SHA256.
+
+   Copyright (C) 2001, 2003, 2006 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 3 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_sha256_verify(const struct rsa_public_key *key,
+		  struct sha256_ctx *hash,
+		  const mpz_t s)
+{
+  int res;
+  mpz_t m;
+
+  mpz_init(m);
+
+  res = (pkcs1_rsa_sha256_encode(m, key->size, hash)
+	 &&_rsa_verify(key, m, s));
+  
+  mpz_clear(m);
+
+  return res;
+}
+
+int
+rsa_sha256_verify_digest(const struct rsa_public_key *key,
+			 const uint8_t *digest,
+			 const mpz_t s)
+{
+  int res;
+  mpz_t m;
+
+  mpz_init(m);
+  
+  res = (pkcs1_rsa_sha256_encode_digest(m, key->size, digest)
+	 && _rsa_verify(key, m, s));
+  
+  mpz_clear(m);
+
+  return res;
+}