libsxmp/sxt/core.c

/*
 * Secure eXtended Message Passing framework
 * Secure eXtended Transport layer implementation: (libsxt)
 * - very similar to SSH2/TLS
 * - using already proven and tested crypto algos
 * - better than TLS for message passing
 *
 * (c) Alexander Vdolainen 2016 <avdolainen@zoho.com>
 *
 * libsxmp is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * libsxmp 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.";
 *
 */

#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <pthread.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <fcntl.h>

#ifdef WIN32
#include <Winsock2.h>
#define EBADE 1
#define NETDB_SUCCESS 0
#else
#include <sys/select.h>
#include <netdb.h>
#include <unistd.h>
#include <uuid/uuid.h>
#endif

#if 0
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <openssl/engine.h>
#endif
#include <openssl/rand.h>

#include <tdata/list.h>

#include <sxt/lcrypt.h>

int sxt_init(void)
{
  return 0;
}

int sxt_finish(void)
{
  return 0;
}

int sxt_get_random(void *data, int len, int pseudo)
{
  if(pseudo) return RAND_bytes(data, len);
  else {
#if OPENSSL_API_COMPAT < 0x10100000L
    RAND_pseudo_bytes(data, len);
#else
    RAND_bytes(data, len);
#endif
  }

  return 1;
}

/* wrappers */
SHA512CTX sha512_init(void){
  SHA512CTX c = malloc(sizeof(*c));
  if (c == NULL) {
    return NULL;
  }
  SHA512_Init(c);

  return c;
}

void sha512_update(SHA512CTX c, const void *data, unsigned long len){
  SHA512_Update(c,data,len);
}

void sha512_final(unsigned char *md, SHA512CTX c) {
  SHA512_Final(md, c);
  if(c) free(c);
}