2 ecdsa.c -- ECDSA key handling
3 Copyright (C) 2011-2013 Guus Sliepen <guus@tinc-vpn.org>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #include "../system.h"
24 #define TINC_ECDSA_INTERNAL
30 #include "../logger.h"
33 #include "../xalloc.h"
35 // Get and set ECDSA keys
37 ecdsa_t *ecdsa_set_base64_public_key(const char *p) {
41 logger(DEBUG_ALWAYS, LOG_ERR, "Invalid size %d for public key!", len);
45 ecdsa_t *ecdsa = xzalloc(sizeof *ecdsa);
46 len = b64decode(p, ecdsa->public, len);
48 logger(DEBUG_ALWAYS, LOG_ERR, "Invalid format of public key! len = %d", len);
56 char *ecdsa_get_base64_public_key(ecdsa_t *ecdsa) {
57 char *base64 = xmalloc(44);
58 b64encode(ecdsa->public, base64, sizeof ecdsa->public);
63 // Read PEM ECDSA keys
65 static bool read_pem(FILE *fp, const char *type, void *buf, size_t size) {
68 size_t typelen = strlen(type);
70 while(fgets(line, sizeof line, fp)) {
72 if(strncmp(line, "-----BEGIN ", 11))
74 if(strncmp(line + 11, type, typelen))
80 if(!strncmp(line, "-----END ", 9))
83 size_t linelen = strcspn(line, "\r\n");
84 size_t len = b64decode(line, line, linelen);
86 logger(DEBUG_ALWAYS, LOG_ERR, "Invalid base64 data in PEM file\n");
92 logger(DEBUG_ALWAYS, LOG_ERR, "Too much base64 data in PEM file\n");
97 memcpy(buf, line, len);
105 logger(DEBUG_ALWAYS, LOG_ERR, "Too little base64 data in PEM file\n");
115 ecdsa_t *ecdsa_read_pem_public_key(FILE *fp) {
116 ecdsa_t *ecdsa = xzalloc(sizeof *ecdsa);
117 if(read_pem(fp, "ED25519 PUBLIC KEY", ecdsa->public, sizeof ecdsa->public))
123 ecdsa_t *ecdsa_read_pem_private_key(FILE *fp) {
124 ecdsa_t *ecdsa = xmalloc(sizeof *ecdsa);
125 if(read_pem(fp, "ED25519 PRIVATE KEY", ecdsa->private, sizeof *ecdsa))
131 size_t ecdsa_size(ecdsa_t *ecdsa) {
135 // TODO: standardise output format?
137 bool ecdsa_sign(ecdsa_t *ecdsa, const void *in, size_t len, void *sig) {
138 ed25519_sign(sig, in, len, ecdsa->public, ecdsa->private);
142 bool ecdsa_verify(ecdsa_t *ecdsa, const void *in, size_t len, const void *sig) {
143 return ed25519_verify(sig, in, len, ecdsa->public);
146 bool ecdsa_active(ecdsa_t *ecdsa) {
150 void ecdsa_free(ecdsa_t *ecdsa) {