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port.c

/* -*- show-trailing-whitespace: t; indent-tabs: t -*-
 * Copyright (c) 2003,2004,2005,2006 David Lichteblau
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <glib.h>
#include <ldap.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/termios.h>
#include <sys/types.h>
#include <unistd.h>

#include "config.h"

#if defined(HAVE_OPENSSL)
#include <openssl/sha.h>
#include <openssl/md5.h>
#elif defined(HAVE_GNUTLS)
#include <gnutls/gnutls.h>
#include <gnutls/openssl.h>
#else
#warning Compiling without cryptographic routines.
#endif

#ifndef HAVE_RAND_PSEUDO_BYTES
#define RAND_pseudo_bytes RAND_bytes
#endif

#ifndef HAVE_MKDTEMP
char *
mkdtemp(char *template)
{
      int l = strlen(template);
      int i = l - 6;
      int fd;
      int n;

      if (i < 0) { errno = EINVAL; return 0; }

      fd = open("/dev/random", O_RDONLY);
      if (fd == -1) {
            fputs("Do you have /dev/random?\n", stderr);
            return 0;
      }
      while (i < l) {
            if ( (n = read(fd, template + i, l - i)) == -1) {
                  close(fd);
                  return 0;
            }
            while (n--) {
                  unsigned char c = template[i];
                  c &= 63;
                  if (c < 10)       c += '0';
                  else if (c < 38)  c += '?' - 10;
                  else              c += 'a' - 38;
                  template[i] = c;
                  i++;
            }
      }
      close(fd);

      if (mkdir(template, 0700) == -1) return 0;
      return template;
}
#endif

#ifndef HAVE_ON_EXIT
static void (*onexitfunction)(int , void *) = 0;
static void *onexitarg;

static void
atexitfunction(void)
{
      onexitfunction(-1, onexitarg);
}

int
on_exit(void (*function)(int, void *), void *arg)
{
      if (onexitfunction) yourfault("on_exit called twice");
      onexitfunction = function;
      onexitarg = arg;
      return atexit(atexitfunction);
}
#endif

void g_string_append_base64(
      GString *string, unsigned char const *src, size_t srclength);

int
g_string_append_sha(GString *string, char *key)
{
#ifdef HAVE_SHA1
      unsigned char tmp[SHA_DIGEST_LENGTH];
      SHA1((unsigned char *) key, strlen(key), tmp);
      g_string_append_base64(string, tmp, sizeof(tmp));
      return 1;
#else
      puts("Sorry, SHA1 support not linked into ldapvi.");
      return 0;
#endif
}

int
g_string_append_ssha(GString *string, char *key)
{
#ifdef HAVE_SHA1
      char rand[4];
      unsigned char tmp[SHA_DIGEST_LENGTH + sizeof(rand)];
      SHA_CTX SHA1context;

      RAND_pseudo_bytes(rand, sizeof(rand));

      SHA1_Init(&SHA1context);
      SHA1_Update(&SHA1context, key, strlen(key));
      SHA1_Update(&SHA1context, rand, sizeof(rand));
      SHA1_Final(tmp, &SHA1context);

      memcpy(tmp + SHA_DIGEST_LENGTH, rand, sizeof(rand));
      g_string_append_base64(string, tmp, sizeof(tmp));
      return 1;
#else
      puts("Sorry, SHA1 support not linked into ldapvi.");
      return 0;
#endif
}

int
g_string_append_md5(GString *string, char *key)
{
#ifdef HAVE_MD5
      unsigned char tmp[MD5_DIGEST_LENGTH];
      MD5((unsigned char *) key, strlen(key), tmp);
      g_string_append_base64(string, tmp, sizeof(tmp));
      return 1;
#else
      puts("Sorry, MD5 support not linked into ldapvi.");
      return 0;
#endif
}

int
g_string_append_smd5(GString *string, char *key)
{
#ifdef HAVE_MD5
      unsigned char rand[4];
      unsigned char tmp[MD5_DIGEST_LENGTH + sizeof(rand)];
      MD5_CTX MD5context;

      RAND_pseudo_bytes(rand, sizeof(rand));

      MD5_Init(&MD5context);
      MD5_Update(&MD5context, key, strlen(key));
      MD5_Update(&MD5context, rand, sizeof(rand));
      MD5_Final(tmp, &MD5context);

      memcpy(tmp + MD5_DIGEST_LENGTH, rand, sizeof(rand));
      g_string_append_base64(string, tmp, sizeof(tmp));

      return 1;
#else
      puts("Sorry, SMD5 support not linked into ldapvi.");
      return 0;
#endif
}

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