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Add signing to public interface

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This commit is contained in:
Pieter Wuille 2013-05-05 00:21:03 +02:00
parent 42f5e7c58d
commit 7823916781
3 changed files with 36 additions and 1 deletions
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13
include/secp256k1.h
View file

@ -27,6 +27,13 @@ int secp256k1_ecdsa_verify(const unsigned char *msg, int msglen,
const unsigned char *sig, int siglen,
const unsigned char *pubkey, int pubkeylen);
int secp256k1_ecdsa_sign(const unsigned char *msg, int msglen,
unsigned char *sig, int* siglen,
const unsigned char *seckey,
const unsigned char *nonce);
int secp256j1_ecdsa_seckey_verify(const unsigned char *seckey);
/** Just validate a public key.
* Returns: 1: valid public key
* 0: invalid public key
@ -39,11 +46,15 @@ int secp256k1_ecdsa_pubkey_verify(const unsigned char *pubkey, int pubkeylen);
* seckey: pointer to a 32-byte private key.
* Out: pubkey: pointer to a 33-byte (if compressed) or 65-byte (if uncompressed)
* area to store the public key.
* pubkeylen: pointer to int that will be updated to contains the pubkey's
* length.
* Returns: 1: secret was valid, public key stores
* 0: secret was invalid, try again.
*/
/* NOT YET IMPLEMENTED */
int secp256k1_ecdsa_pubkey_create(unsigned char *pubkey, int compressed, const unsigned char *seckey)
int secp256k1_ecdsa_pubkey_create(unsigned char *pubkey, int *pubkeylen, const unsigned char *seckey, int compressed)
int secp256k1_ecdsa_pubkey_decompress(unsigned char *pubkey, int *pubkeylen);
#ifdef __cplusplus
}

4
src/bench.c
View file

@ -1,3 +1,7 @@
// Copyright (c) 2013 Pieter Wuille
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <stdio.h>
#include "impl/num.h"

20
src/secp256k1.c
View file

@ -44,3 +44,23 @@ end:
return ret;
}
int secp256k1_ecdsa_sign(const unsigned char *message, int messagelen, unsigned char *signature, int *signaturelen, const unsigned char *seckey, const unsigned char *nonce) {
secp256k1_num_t sec, non, msg;
secp256k1_num_init(&sec);
secp256k1_num_init(&non);
secp256k1_num_init(&msg);
secp256k1_num_set_bin(&sec, seckey, 32);
secp256k1_num_set_bin(&non, nonce, 32);
secp256k1_num_set_bin(&msg, message, messagelen);
secp256k1_ecdsa_sig_t sig;
secp256k1_ecdsa_sig_init(&sig);
int ret = secp256k1_ecdsa_sig_sign(&sig, &sec, &msg, &non);
if (ret) {
secp256k1_ecdsa_sig_serialize(signature, signaturelen, &sig);
}
secp256k1_ecdsa_sig_free(&sig);
secp256k1_num_free(&msg);
secp256k1_num_free(&non);
secp256k1_num_free(&sec);
return ret;
}