134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/*
|
|
rsa.c -- RSA key handling
|
|
Copyright (C) 2007-2013 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 <openssl/pem.h>
|
|
#include <openssl/err.h>
|
|
|
|
#define __TINC_RSA_INTERNAL__
|
|
typedef RSA rsa_t;
|
|
|
|
#include "../logger.h"
|
|
#include "../rsa.h"
|
|
|
|
// Set RSA keys
|
|
|
|
#ifndef HAVE_RSA_SET0_KEY
|
|
int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d) {
|
|
BN_free(r->n); r->n = n;
|
|
BN_free(r->e); r->e = e;
|
|
BN_free(r->d); r->d = d;
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
rsa_t *rsa_set_hex_public_key(char *n, char *e) {
|
|
BIGNUM *bn_n = NULL;
|
|
BIGNUM *bn_e = NULL;
|
|
|
|
if(BN_hex2bn(&bn_n, n) != strlen(n) || BN_hex2bn(&bn_e, e) != strlen(e)) {
|
|
BN_free(bn_e);
|
|
BN_free(bn_n);
|
|
return false;
|
|
}
|
|
|
|
rsa_t *rsa = RSA_new();
|
|
if(!rsa)
|
|
return NULL;
|
|
|
|
RSA_set0_key(rsa, bn_n, bn_e, NULL);
|
|
|
|
return rsa;
|
|
}
|
|
|
|
rsa_t *rsa_set_hex_private_key(char *n, char *e, char *d) {
|
|
BIGNUM *bn_n = NULL;
|
|
BIGNUM *bn_e = NULL;
|
|
BIGNUM *bn_d = NULL;
|
|
|
|
if(BN_hex2bn(&bn_n, n) != strlen(n) || BN_hex2bn(&bn_e, e) != strlen(e) || BN_hex2bn(&bn_d, d) != strlen(d)) {
|
|
BN_free(bn_d);
|
|
BN_free(bn_e);
|
|
BN_free(bn_n);
|
|
return false;
|
|
}
|
|
|
|
rsa_t *rsa = RSA_new();
|
|
if(!rsa)
|
|
return NULL;
|
|
|
|
RSA_set0_key(rsa, bn_n, bn_e, bn_d);
|
|
|
|
return rsa;
|
|
}
|
|
|
|
// Read PEM RSA keys
|
|
|
|
rsa_t *rsa_read_pem_public_key(FILE *fp) {
|
|
rsa_t *rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL);
|
|
|
|
if(!rsa) {
|
|
rewind(fp);
|
|
rsa = PEM_read_RSA_PUBKEY(fp, NULL, NULL, NULL);
|
|
}
|
|
|
|
if(!rsa)
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Unable to read RSA public key: %s", ERR_error_string(ERR_get_error(), NULL));
|
|
|
|
return rsa;
|
|
}
|
|
|
|
rsa_t *rsa_read_pem_private_key(FILE *fp) {
|
|
rsa_t *rsa = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
|
|
|
|
if(!rsa)
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Unable to read RSA private key: %s", ERR_error_string(ERR_get_error(), NULL));
|
|
|
|
return rsa;
|
|
}
|
|
|
|
size_t rsa_size(rsa_t *rsa) {
|
|
return RSA_size(rsa);
|
|
}
|
|
|
|
bool rsa_public_encrypt(rsa_t *rsa, void *in, size_t len, void *out) {
|
|
if(RSA_public_encrypt(len, in, out, rsa, RSA_NO_PADDING) == len)
|
|
return true;
|
|
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Unable to perform RSA encryption: %s", ERR_error_string(ERR_get_error(), NULL));
|
|
return false;
|
|
}
|
|
|
|
bool rsa_private_decrypt(rsa_t *rsa, void *in, size_t len, void *out) {
|
|
if(RSA_private_decrypt(len, in, out, rsa, RSA_NO_PADDING) == len)
|
|
return true;
|
|
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Unable to perform RSA decryption: %s", ERR_error_string(ERR_get_error(), NULL));
|
|
return false;
|
|
}
|
|
|
|
bool rsa_active(rsa_t *rsa) {
|
|
return rsa;
|
|
}
|
|
|
|
void rsa_free(rsa_t *rsa) {
|
|
if(rsa)
|
|
RSA_free(rsa);
|
|
}
|