134 lines
2.9 KiB
C
134 lines
2.9 KiB
C
/*
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* Secure eXtended Message Passing framework
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* Secure eXtended Transport layer implementation: (libsxt)
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* - very similar to SSH2/TLS
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* - using already proven and tested crypto algos
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* - better than TLS for message passing
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*
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* PublicPrivateKeyPairs operation API
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*
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* (c) Alexander Vdolainen 2016 <avdolainen@zoho.com>
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*
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* libsxmp is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* libsxmp is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.";
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include <openssl/engine.h>
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#include <sxt/errno.h>
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#include <sxt/sxtkey.h>
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int sxt_key_generate(sxtkey_t *key, int type, int opt)
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{
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int r = 0;
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if(!key) return SXT_EINVAL;
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/* set defaults */
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key->type = type;
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key->flags = SXT_PPKP_PRIVATE | SXT_PPKP_PUBLIC;
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switch(type) {
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case PPKP_ED25519:
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key->pubkey = malloc(sizeof(ed25519_pubkey));
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if(!key->pubkey) {
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r = SXT_ENOMEM;
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goto __fall;
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}
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key->privkey = malloc(sizeof(ed25519_privkey));
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if(!key->privkey) {
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r = SXT_ENOMEM;
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goto __safefall0;
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}
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r = crypto_sign_ed25519_keypair(*key->pubkey, *key->privkey);
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if(r) {
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r = SXT_ECRYPTO;
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goto __safefall0;
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}
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break;
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default:
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return SXT_EINVAL;
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}
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if(!r) return SXT_SUCCESS;
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__safefall0:
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if(key->pubkey) free(key->pubkey);
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if(key->privkey) free(key->privkey);
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__fall:
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return r;
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}
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sxtkey_t *sxt_key_alloc(void)
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{
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sxtkey_t *key = malloc(sizeof(sxtkey_t));
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if(!key) return NULL;
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return key;
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}
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void sxt_key_burn(sxtkey_t *key)
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{
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if(!key) return;
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key->priv = NULL;
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switch(key->type) {
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case PPKP_ED25519:
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if(key->pubkey) memset(key->pubkey, 0, sizeof(ed25519_pubkey));
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if(key->privkey) memset(key->privkey, 0, sizeof(ed25519_privkey));
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break;
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default:
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return;
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}
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key->type = 0;
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key->flags = 0;
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return;
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}
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void sxt_key_free(sxtkey_t *key)
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{
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if(!key) return;
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switch(key->type) {
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case PPKP_ED25519:
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if(key->pubkey) free(key->pubkey);
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if(key->privkey) free(key->privkey);
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break;
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default: return; /* cannot free unrecognized key due to the
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* potential memleak
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*/
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}
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free(key);
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return;
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}
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