2G ems initial

include/nettle/ecdsa.h

@@ -0,0 +1,103 @@
+/* ecdsa.h
+
+   Copyright (C) 2013 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/.
+*/
+
+/* Development of Nettle's ECC support was funded by the .SE Internet Fund. */
+
+#ifndef NETTLE_ECDSA_H_INCLUDED
+#define NETTLE_ECDSA_H_INCLUDED
+
+#include "ecc.h"
+#include "dsa.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Name mangling */
+#define ecdsa_sign nettle_ecdsa_sign
+#define ecdsa_verify nettle_ecdsa_verify
+#define ecdsa_generate_keypair nettle_ecdsa_generate_keypair
+#define ecc_ecdsa_sign nettle_ecc_ecdsa_sign
+#define ecc_ecdsa_sign_itch nettle_ecc_ecdsa_sign_itch
+#define ecc_ecdsa_verify nettle_ecc_ecdsa_verify
+#define ecc_ecdsa_verify_itch nettle_ecc_ecdsa_verify_itch
+
+/* High level ECDSA functions.
+ *
+ * A public key is represented as a struct ecc_point, and a private
+ * key as a struct ecc_scalar. FIXME: Introduce some aliases? */
+void
+ecdsa_sign (const struct ecc_scalar *key,
+	    void *random_ctx, nettle_random_func *random,
+	    size_t digest_length,
+	    const uint8_t *digest,
+	    struct dsa_signature *signature);
+
+int
+ecdsa_verify (const struct ecc_point *pub,
+	      size_t length, const uint8_t *digest,
+	      const struct dsa_signature *signature);
+
+void
+ecdsa_generate_keypair (struct ecc_point *pub,
+			struct ecc_scalar *key,
+			void *random_ctx, nettle_random_func *random);
+
+/* Low-level ECDSA functions. */
+mp_size_t
+ecc_ecdsa_sign_itch (const struct ecc_curve *ecc);
+
+void
+ecc_ecdsa_sign (const struct ecc_curve *ecc,
+		const mp_limb_t *zp,
+		/* Random nonce, must be invertible mod ecc group
+		   order. */
+		const mp_limb_t *kp,
+		size_t length, const uint8_t *digest,
+		mp_limb_t *rp, mp_limb_t *sp,
+		mp_limb_t *scratch);
+
+mp_size_t
+ecc_ecdsa_verify_itch (const struct ecc_curve *ecc);
+
+int
+ecc_ecdsa_verify (const struct ecc_curve *ecc,
+		  const mp_limb_t *pp, /* Public key */
+		  size_t length, const uint8_t *digest,
+		  const mp_limb_t *rp, const mp_limb_t *sp,
+		  mp_limb_t *scratch);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NETTLE_ECDSA_H_INCLUDED */