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/* The MIT License (MIT)
*
* Copyright (c) 2015 mehdi sotoodeh
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef __ed25519_signature_h__
#define __ed25519_signature_h__
#ifdef __cplusplus
extern "C" {
#endif
/* -- ed25519-sign ------------------------------------------------------------- */
#define ed25519_public_key_size 32
#define ed25519_secret_key_size 32
#define ed25519_private_key_size 64
#define ed25519_signature_size 64
/* Generate public key associated with the secret key */
void ed25519_CreateKeyPair(
unsigned char *pubKey, /* OUT: public key */
unsigned char *privKey, /* OUT: private key */
const void *blinding, /* IN: [optional] null or blinding context */
const unsigned char *sk); /* IN: secret key (32 bytes) */
/* Generate message signature */
void ed25519_SignMessage(
unsigned char *signature, /* OUT:[64 bytes] signature (R,S) */
const unsigned char *privKey, /* IN: [64 bytes] private key (sk,pk) */
const void *blinding, /* IN: [optional] null or blinding context */
const unsigned char *msg, /* IN: [msg_size bytes] message to sign */
size_t msg_size); /* IN: size of message */
void *ed25519_Blinding_Init(
void *context, /* IO: null or ptr blinding context */
const unsigned char *seed, /* IN: [size bytes] random blinding seed */
size_t size); /* IN: size of blinding seed */
void ed25519_Blinding_Finish(
void *context); /* IN: blinding context */
/* -- ed25519-verify ----------------------------------------------------------- */
/* Single-phased signature validation.
Returns 1 for SUCCESS and 0 for FAILURE
*/
int ed25519_VerifySignature(
const unsigned char *signature, /* IN: [64 bytes] signature (R,S) */
const unsigned char *publicKey, /* IN: [32 bytes] public key */
const unsigned char *msg, /* IN: [msg_size bytes] message to sign */
size_t msg_size); /* IN: size of message */
/* First part of two-phase signature validation.
This function creates context specifc to a given public key.
Needs to be called once per public key
*/
void * ed25519_Verify_Init(
void *context, /* IO: null or verify context to use */
const unsigned char *publicKey); /* IN: [32 bytes] public key */
/* Second part of two-phase signature validation.
Input context is output of ed25519_Verify_Init() for associated public key.
Call it once for each message/signature pairs
Returns 1 for SUCCESS and 0 for FAILURE
*/
int ed25519_Verify_Check(
const void *context, /* IN: created by ed25519_Verify_Init */
const unsigned char *signature, /* IN: signature (R,S) */
const unsigned char *msg, /* IN: message to sign */
size_t msg_size); /* IN: size of message */
/* Free up context memory */
void ed25519_Verify_Finish(void *ctx);
#ifdef __cplusplus
}
#endif
#endif /* __ed25519_signature_h__ */
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