C:/xampp/htdocs/zen-cart/admin/includes/functions/password_funcs.php

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<?php

// This function validates a plain text password with an encrpyted password
  function zen_validate_password($plain, $encrypted) {
    if (zen_not_null($plain) && zen_not_null($encrypted)) {
// split apart the hash / salt
      $stack = explode(':', $encrypted);

      if (sizeof($stack) != 2) return false;

      if (md5($stack[1] . $plain) == $stack[0]) {
        return true;
      }
    }

    return false;
  }

// This function makes a new password from a plaintext password.
  function zen_encrypt_password($plain) {
    $password = '';

    for ($i=0; $i<10; $i++) {
      $password .= zen_rand();
    }

    $salt = substr(md5($password), 0, 2);

    $password = md5($salt . $plain) . ':' . $salt;

    return $password;
  }

// This function comes up with a plaintext word.
// You can then pass this word over to zen_encrypt_password or another similar function
  function zen_create_random_value($length, $type = 'mixed') {
    if ( ($type != 'mixed') && ($type != 'chars') && ($type != 'digits')) return false;

    $rand_value = '';
    while (strlen($rand_value) < $length) {
      if ($type == 'digits') {
        $char = zen_rand(0,9);
      } else {
        $char = chr(zen_rand(0,255));
      }
      if ($type == 'mixed') {
        if (preg_match('/^[a-z0-9]$/i', $char)) $rand_value .= $char;
      } elseif ($type == 'chars') {
        if (preg_match('/^[a-z]$/i', $char)) $rand_value .= $char;
      } elseif ($type == 'digits') {
        if (preg_match('/^[0-9]$/', $char)) $rand_value .= $char;
      }
    }

    if ($type == 'mixed' && !preg_match('/^(?=.*[\w]+.*)(?=.*[\d]+.*)[\d\w]{' . $length . ',}$/', $rand_value)) {
      $rand_value .= zen_rand(0,9);
    }

    return $rand_value;
  }