1b8f891836
Disable libgcrypt by default. Since it doesn't support the OFB cipher mode, we can't use it in a backwards compatible way.
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/*
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rsa.c -- RSA key handling
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Copyright (C) 2007 Guus Sliepen <guus@tinc-vpn.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#include "system.h"
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#include <openssl/pem.h>
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#include <openssl/err.h>
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#include "logger.h"
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#include "rsa.h"
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// Set RSA keys
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bool rsa_set_hex_public_key(rsa_t *rsa, char *n, char *e) {
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*rsa = RSA_new();
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BN_hex2bn(&(*rsa)->n, n);
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BN_hex2bn(&(*rsa)->e, e);
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return true;
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}
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bool rsa_set_hex_private_key(rsa_t *rsa, char *n, char *e, char *d) {
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*rsa = RSA_new();
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BN_hex2bn(&(*rsa)->n, n);
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BN_hex2bn(&(*rsa)->e, e);
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BN_hex2bn(&(*rsa)->d, d);
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return true;
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}
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// Read PEM RSA keys
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bool rsa_read_pem_public_key(rsa_t *rsa, FILE *fp) {
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*rsa = PEM_read_RSAPublicKey(fp, rsa, NULL, NULL);
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if(*rsa)
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return true;
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*rsa = PEM_read_RSA_PUBKEY(fp, rsa, NULL, NULL);
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if(*rsa)
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return true;
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logger(LOG_ERR, _("Unable to read RSA public key: %s"), ERR_error_string(ERR_get_error(), NULL));
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return false;
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}
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bool rsa_read_pem_private_key(rsa_t *rsa, FILE *fp) {
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*rsa = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
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if(*rsa)
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return true;
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logger(LOG_ERR, _("Unable to read RSA private key: %s"), ERR_error_string(ERR_get_error(), NULL));
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return false;
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}
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size_t rsa_size(rsa_t *rsa) {
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return RSA_size(*rsa);
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}
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bool rsa_public_encrypt(rsa_t *rsa, void *in, size_t len, void *out) {
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if(RSA_public_encrypt(len, in, out, *rsa, RSA_NO_PADDING) == len)
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return true;
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logger(LOG_ERR, _("Unable to perform RSA encryption: %s"), ERR_error_string(ERR_get_error(), NULL));
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return false;
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}
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bool rsa_private_decrypt(rsa_t *rsa, void *in, size_t len, void *out) {
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if(RSA_private_decrypt(len, in, out, *rsa, RSA_NO_PADDING) == len)
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return true;
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logger(LOG_ERR, _("Unable to perform RSA decryption: %s"), ERR_error_string(ERR_get_error(), NULL));
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return false;
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}
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