--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/misc/pwcrypt.cc	Wed Jan 16 22:39:43 2008 +0100
@@ -0,0 +1,111 @@
+// Copyright (C) 1999,2000 Bruce Guenter <bruceg@em.ca>
+//
+// 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 <config.h>
+#include <unistd.h>
+#include <stdlib.h>
+#ifdef HAVE_CRYPT_H
+#include <crypt.h>
+#endif
+#include "pwcrypt.h"
+
+#ifndef HAVE_CRYPT
+char *crypt(const char *key, const char *salt);
+#endif
+
+#ifndef HAVE_RANDOM
+long int random(void);
+#endif
+
+#ifdef USE_CRYPT
+
+static const char passwd_table[65] =
+"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./";
+
+bool crypt_cmp(const mystring& pass, const mystring& stored)
+{
+  if(!stored || !pass)
+    return false;
+  const char* encrypted = crypt(pass.c_str(), stored.c_str());
+  return stored == encrypted;
+}
+
+const char* pwcrypt(const mystring& pass)
+{
+  char salt[2] = {
+    passwd_table[random() % 64],
+    passwd_table[random() % 64]
+  };
+  return crypt(pass.c_str(), salt);
+}
+
+#else // USE_CRYPT
+
+static const char passwd_table[65] =
+"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+
+extern "C"
+{
+#include "md5.h"
+};
+
+static const char bin2hex_table[17] = "0123456789abcdef";
+
+#define OLD_MD5_CODE '3'
+
+static const char* encrypt_old_md5(const mystring& pass)
+{
+  md5_ctx ctx;
+  md5_init_ctx(&ctx);
+  md5_process_bytes(pass.c_str(), pass.length(), &ctx);
+  unsigned char md5[16];
+  md5_finish_ctx(&ctx, md5);
+  static char out[34];
+  out[0] = OLD_MD5_CODE;
+  for(unsigned i = 0; i < 16; i++) {
+    out[i*2+1] = bin2hex_table[md5[i]>>4];
+    out[i*2+2] = bin2hex_table[md5[i]&0xf];
+  }
+  out[33] = 0;
+  return out;
+}
+
+extern "C" char *md5_crypt __P ((const char *key, const char *salt));
+
+bool crypt_cmp(const mystring& pass, const mystring& stored)
+{
+  if(!stored || !pass)
+    return false;
+  const char* encrypted;
+  if(stored.length() == 33 && stored[0] == OLD_MD5_CODE)
+    encrypted = encrypt_old_md5(pass.c_str());
+  else if(stored[0] == '$' && stored[1] == '1' && stored[2] == '$')
+    encrypted = md5_crypt(pass.c_str(), stored.c_str());
+  else
+    encrypted = crypt(pass.c_str(), stored.c_str());
+  return stored == encrypted;
+}
+
+const char* pwcrypt(const mystring& pass)
+{
+  char salt[14] = "$1$";
+  for(unsigned i = 3; i < 11; i++)
+    salt[i] = passwd_table[random() % 64];
+  salt[12] = 0;
+  return md5_crypt(pass.c_str(), salt);
+}
+
+#endif // USE_MD5