2f01744f82
This uses the portable Ed25519 library made by Orson Peters, which in turn uses the reference implementation made by Daniel J. Bernstein. This implementation also allows Ed25519 keys to be used for key exchange, so there is no need to add a separate implementation of Curve25519.
102 lines
2.5 KiB
C
102 lines
2.5 KiB
C
/*
|
|
ecdsa.c -- ECDSA key handling
|
|
Copyright (C) 2011-2013 Guus Sliepen <guus@tinc-vpn.org>
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of 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.
|
|
|
|
This program 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 a copy of the GNU General Public License along
|
|
with this program; if not, write to the Free Software Foundation, Inc.,
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "../system.h"
|
|
|
|
#include "ed25519.h"
|
|
|
|
#define __TINC_ECDSA_INTERNAL__
|
|
typedef struct {
|
|
uint8_t private[64];
|
|
uint8_t public[32];
|
|
} ecdsa_t;
|
|
|
|
#include "../logger.h"
|
|
#include "../ecdsa.h"
|
|
#include "../utils.h"
|
|
#include "../xalloc.h"
|
|
|
|
// Get and set ECDSA keys
|
|
//
|
|
ecdsa_t *ecdsa_set_base64_public_key(const char *p) {
|
|
int len = strlen(p);
|
|
|
|
if(len != 43) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Invalid size %s for public key!", len);
|
|
return 0;
|
|
}
|
|
|
|
ecdsa_t *ecdsa = xzalloc(sizeof *ecdsa);
|
|
len = b64decode(p, ecdsa->public, len);
|
|
if(len != 32) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Invalid format of public key! len = %d", len);
|
|
free(ecdsa);
|
|
return 0;
|
|
}
|
|
|
|
return ecdsa;
|
|
}
|
|
|
|
char *ecdsa_get_base64_public_key(ecdsa_t *ecdsa) {
|
|
char *base64 = xmalloc(44);
|
|
b64encode(ecdsa->public, base64, sizeof ecdsa->public);
|
|
|
|
return base64;
|
|
}
|
|
|
|
// Read PEM ECDSA keys
|
|
|
|
ecdsa_t *ecdsa_read_pem_public_key(FILE *fp) {
|
|
ecdsa_t *ecdsa = xzalloc(sizeof *ecdsa);
|
|
if(fread(ecdsa->public, sizeof ecdsa->public, 1, fp) == 1)
|
|
return ecdsa;
|
|
free(ecdsa);
|
|
return 0;
|
|
}
|
|
|
|
ecdsa_t *ecdsa_read_pem_private_key(FILE *fp) {
|
|
ecdsa_t *ecdsa = xmalloc(sizeof *ecdsa);
|
|
if(fread(ecdsa, sizeof *ecdsa, 1, fp) == 1)
|
|
return ecdsa;
|
|
free(ecdsa);
|
|
return 0;
|
|
}
|
|
|
|
size_t ecdsa_size(ecdsa_t *ecdsa) {
|
|
return 64;
|
|
}
|
|
|
|
// TODO: standardise output format?
|
|
|
|
bool ecdsa_sign(ecdsa_t *ecdsa, const void *in, size_t len, void *sig) {
|
|
ed25519_sign(sig, in, len, ecdsa->public, ecdsa->private);
|
|
return true;
|
|
}
|
|
|
|
bool ecdsa_verify(ecdsa_t *ecdsa, const void *in, size_t len, const void *sig) {
|
|
return ed25519_verify(sig, in, len, ecdsa->public);
|
|
}
|
|
|
|
bool ecdsa_active(ecdsa_t *ecdsa) {
|
|
return ecdsa;
|
|
}
|
|
|
|
void ecdsa_free(ecdsa_t *ecdsa) {
|
|
free(ecdsa);
|
|
}
|