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libsxmp/include/sxt/ed25519.h

73 lines
2.6 KiB
C

/*
* Secure eXtended Message Passing framework
* Secure eXtended Transport layer implementation: (libsxt)
* - very similar to SSH2/TLS
* - using already proven and tested crypto algos
* - better than TLS for message passing
*
* PublicPrivateKeyPairs operation API
*
* Copyright (c) 2014 by Aris Adamantiadis
* (c) Alexander Vdolainen 2016 <avdolainen@zoho.com>
*
* libsxmp 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.
*
* libsxmp 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 this program. If not, see <http://www.gnu.org/licenses/>.";
*
*/
#ifndef __SXT_ED25519_H__
#define __SXT_ED25519_H__
#include <sxt/ge25519.h>
#include <sxt/sxtkey.h>
/* ed25519 related functions */
/** @internal
* @brief generate an ed25519 key pair
* @param[out] pk generated public key
* @param[out] sk generated secret key
* @return 0 on success, -1 on error.
* */
int crypto_sign_ed25519_keypair(ed25519_pubkey pk, ed25519_privkey sk);
/** @internal
* @brief sign a message with ed25519
* @param[out] sm location to store the signed message.
* Its length should be mlen + 64.
* @param[out] smlen pointer to the size of the signed message
* @param[in] m message to be signed
* @param[in] mlen length of the message to be signed
* @param[in] sk secret key to sign the message with
* @return 0 on success.
*/
int crypto_sign_ed25519(unsigned char *sm,unsigned long long *smlen,
const unsigned char *m,unsigned long long mlen,
const ed25519_privkey sk);
/** @internal
* @brief "open" and verify the signature of a signed message
* @param[out] m location to store the verified message.
* Its length should be equal to smlen.
* @param[out] mlen pointer to the size of the verified message
* @param[in] sm signed message to verify
* @param[in] smlen length of the signed message to verify
* @param[in] pk public key used to sign the message
* @returns 0 on success (supposedly).
*/
int crypto_sign_ed25519_open(unsigned char *m,unsigned long long *mlen,
const unsigned char *sm,unsigned long long smlen,
const ed25519_pubkey pk);
/** @} */
#endif