111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
/*
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rsa.c -- RSA key handling
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Copyright (C) 2007-2013 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 along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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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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#define __TINC_RSA_INTERNAL__
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typedef RSA rsa_t;
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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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rsa_t *rsa_set_hex_public_key(char *n, char *e) {
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rsa_t *rsa = RSA_new();
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if(!rsa)
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return NULL;
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if(BN_hex2bn(&rsa->n, n) != strlen(n) || BN_hex2bn(&rsa->e, e) != strlen(e)) {
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RSA_free(rsa);
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return false;
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}
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return rsa;
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}
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rsa_t *rsa_set_hex_private_key(char *n, char *e, char *d) {
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rsa_t *rsa = RSA_new();
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if(!rsa)
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return NULL;
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if(BN_hex2bn(&rsa->n, n) != strlen(n) || BN_hex2bn(&rsa->e, e) != strlen(e) || BN_hex2bn(&rsa->d, d) != strlen(d)) {
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RSA_free(rsa);
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return false;
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}
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return rsa;
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}
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// Read PEM RSA keys
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rsa_t *rsa_read_pem_public_key(FILE *fp) {
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rsa_t *rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL);
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if(!rsa) {
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rewind(fp);
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rsa = PEM_read_RSA_PUBKEY(fp, NULL, NULL, NULL);
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}
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if(!rsa)
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logger(DEBUG_ALWAYS, LOG_ERR, "Unable to read RSA public key: %s", ERR_error_string(ERR_get_error(), NULL));
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return rsa;
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}
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rsa_t *rsa_read_pem_private_key(FILE *fp) {
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rsa_t *rsa = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
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if(!rsa)
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logger(DEBUG_ALWAYS, LOG_ERR, "Unable to read RSA private key: %s", ERR_error_string(ERR_get_error(), NULL));
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return rsa;
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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(DEBUG_ALWAYS, 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(DEBUG_ALWAYS, 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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bool rsa_active(rsa_t *rsa) {
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return rsa;
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}
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void rsa_free(rsa_t *rsa) {
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if(rsa)
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RSA_free(rsa);
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}
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