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- /* Copyright (c) 2015, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
-
- #ifndef OPENSSL_HEADER_CURVE25519_H
- #define OPENSSL_HEADER_CURVE25519_H
-
- #include <openssl/base.h>
-
- #if defined(__cplusplus)
- extern "C" {
- #endif
-
-
- /* Curve25519.
- *
- * Curve25519 is an elliptic curve. See
- * https://tools.ietf.org/html/draft-irtf-cfrg-curves-11. */
-
-
- /* X25519.
- *
- * Curve25519 is an elliptic curve. The same name is also sometimes used for
- * the Diffie-Hellman primitive built from it but “X25519” is a more precise
- * name for that, which is the one used here. See http://cr.yp.to/ecdh.html and
- * https://tools.ietf.org/html/draft-irtf-cfrg-curves-11. */
-
- /* X25519_keypair sets |out_public_value| and |out_private_key| to a freshly
- * generated, public–private key pair. */
- OPENSSL_EXPORT void X25519_keypair(uint8_t out_public_value[32],
- uint8_t out_private_key[32]);
-
- /* X25519 writes a shared key to |out_shared_key| that is calculated from the
- * given private key and the peer's public value. It returns one on success and
- * zero on error.
- *
- * Don't use the shared key directly, rather use a KDF and also include the two
- * public values as inputs. */
- OPENSSL_EXPORT int X25519(uint8_t out_shared_key[32],
- const uint8_t private_key[32],
- const uint8_t peers_public_value[32]);
-
- /* X25519_public_from_private calculates a Diffie-Hellman public value from the
- * given private key and writes it to |out_public_value|. */
- OPENSSL_EXPORT void X25519_public_from_private(uint8_t out_public_value[32],
- const uint8_t private_key[32]);
-
-
- /* Ed25519.
- *
- * Ed25519 is a signature scheme using a twisted-Edwards curve that is
- * birationally equivalent to curve25519. */
-
- /* ED25519_keypair sets |out_public_key| and |out_private_key| to a freshly
- * generated, public–private key pair. */
- OPENSSL_EXPORT void ED25519_keypair(uint8_t out_public_key[32],
- uint8_t out_private_key[64]);
-
- /* ED25519_sign sets |out_sig| to be a signature of |message_len| bytes from
- * |message| using |private_key|. It returns one on success or zero on
- * error. */
- OPENSSL_EXPORT int ED25519_sign(uint8_t out_sig[64], const uint8_t *message,
- size_t message_len,
- const uint8_t private_key[64]);
-
- /* ED25519_verify returns one iff |signature| is a valid signature, by
- * |public_key| of |message_len| bytes from |message|. It returns zero
- * otherwise. */
- OPENSSL_EXPORT int ED25519_verify(const uint8_t *message, size_t message_len,
- const uint8_t signature[64],
- const uint8_t public_key[32]);
-
-
- #if defined(__cplusplus)
- } /* extern C */
- #endif
-
- #endif /* OPENSSL_HEADER_CURVE25519_H */
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