/usr/share/php/Horde/Auth.php is in php-horde-auth 2.1.11-1ubuntu1.
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/**
* Copyright 1999-2016 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (LGPL). If you did
* not receive this file, http://www.horde.org/licenses/lgpl21
*
* @author Chuck Hagenbuch <chuck@horde.org>
* @author Michael Slusarz <slusarz@horde.org>
* @category Horde
* @license http://www.horde.org/licenses/lgpl21 LGPL-2.1
* @package Auth
*/
/**
* The Horde_Auth class provides some useful authentication-related utilities
* and constants for the Auth package.
*
* @author Chuck Hagenbuch <chuck@horde.org>
* @author Michael Slusarz <slusarz@horde.org>
* @category Horde
* @license http://www.horde.org/licenses/lgpl21 LGPL-2.1
* @package Auth
*/
class Horde_Auth
{
/**
* Authentication failure reasons.
*
* <pre>
* REASON_BADLOGIN - Bad username and/or password
* REASON_FAILED - Login failed
* REASON_EXPIRED - Password has expired
* REASON_LOGOUT - Logout due to user request
* REASON_MESSAGE - Logout with custom message
* REASON_SESSION - Logout due to session expiration
* REASON_LOCKED - User is locked
* </pre>
*/
const REASON_BADLOGIN = 1;
const REASON_FAILED = 2;
const REASON_EXPIRED = 3;
const REASON_LOGOUT = 4;
const REASON_MESSAGE = 5;
const REASON_SESSION = 6;
const REASON_LOCKED = 7;
/**
* 64 characters that are valid for APRMD5 passwords.
*/
const APRMD5_VALID = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
/**
* Characters used when generating a password.
*/
const VOWELS = 'aeiouy';
const CONSONANTS = 'bcdfghjklmnpqrstvwxz';
const NUMBERS = '0123456789';
/**
* Attempts to return a concrete Horde_Auth_Base instance based on
* $driver.
*
* @deprecated
*
* @param string $driver Either a driver name, or the full class name to
* use (class must extend Horde_Auth_Base).
* @param array $params A hash containing any additional configuration
* or parameters a subclass might need.
*
* @return Horde_Auth_Base The newly created concrete instance.
* @throws Horde_Auth_Exception
*/
public static function factory($driver, $params = null)
{
/* Base drivers (in Auth/ directory). */
$class = __CLASS__ . '_' . Horde_String::ucfirst($driver);
if (@class_exists($class)) {
return new $class($params);
}
/* Explicit class name, */
$class = $driver;
if (@class_exists($class)) {
return new $class($params);
}
throw new Horde_Auth_Exception(__CLASS__ . ': Class definition of ' . $driver . ' not found.');
}
/**
* Formats a password using the current encryption.
*
* @param string $plaintext The plaintext password to encrypt.
* @param string $salt The salt to use to encrypt the password.
* If not present, a new salt will be
* generated.
* @param string $encryption The kind of pasword encryption to use.
* Defaults to md5-hex.
* @param boolean $show_encrypt Some password systems prepend the kind of
* encryption to the crypted password ({SHA},
* etc). Defaults to false.
*
* @return string The encrypted password.
*/
public static function getCryptedPassword($plaintext, $salt = '',
$encryption = 'md5-hex',
$show_encrypt = false)
{
/* Get the salt to use. */
$salt = self::getSalt($encryption, $salt, $plaintext);
/* Encrypt the password. */
switch ($encryption) {
case 'aprmd5':
$length = strlen($plaintext);
$context = $plaintext . '$apr1$' . $salt;
$binary = pack('H*', hash('md5', $plaintext . $salt . $plaintext));
for ($i = $length; $i > 0; $i -= 16) {
$context .= substr($binary, 0, ($i > 16 ? 16 : $i));
}
for ($i = $length; $i > 0; $i >>= 1) {
$context .= ($i & 1) ? chr(0) : $plaintext[0];
}
$binary = pack('H*', hash('md5', $context));
for ($i = 0; $i < 1000; ++$i) {
$new = ($i & 1) ? $plaintext : substr($binary, 0, 16);
if ($i % 3) {
$new .= $salt;
}
if ($i % 7) {
$new .= $plaintext;
}
$new .= ($i & 1) ? substr($binary, 0, 16) : $plaintext;
$binary = pack('H*', hash('md5', $new));
}
$p = array();
for ($i = 0; $i < 5; $i++) {
$k = $i + 6;
$j = $i + 12;
if ($j == 16) {
$j = 5;
}
$p[] = self::_toAPRMD5((ord($binary[$i]) << 16) |
(ord($binary[$k]) << 8) |
(ord($binary[$j])),
5);
}
return '$apr1$' . $salt . '$' . implode('', $p) . self::_toAPRMD5(ord($binary[11]), 3);
case 'crypt':
case 'crypt-des':
case 'crypt-md5':
case 'crypt-sha256':
case 'crypt-sha512':
case 'crypt-blowfish':
return ($show_encrypt ? '{crypt}' : '') . crypt($plaintext, $salt);
case 'joomla-md5':
return md5($plaintext . $salt) . ':' . $salt;
case 'md5-base64':
$encrypted = base64_encode(pack('H*', hash('md5', $plaintext)));
return $show_encrypt ? '{MD5}' . $encrypted : $encrypted;
case 'msad':
return Horde_String::convertCharset('"' . $plaintext . '"', 'ISO-8859-1', 'UTF-16LE');
case 'mysql':
$encrypted = '*' . Horde_String::upper(sha1(sha1($plaintext, true), false));
return $show_encrypt ? '{MYSQL}' . $encrypted : $encrypted;
case 'plain':
return $plaintext;
case 'sha':
case 'sha1':
$encrypted = base64_encode(pack('H*', hash('sha1', $plaintext)));
return $show_encrypt ? '{SHA}' . $encrypted : $encrypted;
case 'sha256':
case 'ssha256':
$encrypted = base64_encode(pack('H*', hash('sha256', $plaintext . $salt)) . $salt);
return $show_encrypt ? '{SSHA256}' . $encrypted : $encrypted;
case 'smd5':
$encrypted = base64_encode(pack('H*', hash('md5', $plaintext . $salt)) . $salt);
return $show_encrypt ? '{SMD5}' . $encrypted : $encrypted;
case 'ssha':
$encrypted = base64_encode(pack('H*', hash('sha1', $plaintext . $salt)) . $salt);
return $show_encrypt ? '{SSHA}' . $encrypted : $encrypted;
case 'md5-hex':
default:
return ($show_encrypt) ? '{MD5}' . hash('md5', $plaintext) : hash('md5', $plaintext);
}
}
/**
* Returns a salt for the appropriate kind of password encryption.
* Optionally takes a seed and a plaintext password, to extract the seed
* of an existing password, or for encryption types that use the plaintext
* in the generation of the salt.
*
* @param string $encryption The kind of pasword encryption to use.
* Defaults to md5-hex.
* @param string $seed The seed to get the salt from (probably a
* previously generated password). Defaults to
* generating a new seed.
* @param string $plaintext The plaintext password that we're generating
* a salt for. Defaults to none.
*
* @return string The generated or extracted salt.
*/
public static function getSalt($encryption = 'md5-hex', $seed = '',
$plaintext = '')
{
switch ($encryption) {
case 'aprmd5':
if ($seed) {
return substr(preg_replace('/^\$apr1\$(.{8}).*/', '\\1', $seed), 0, 8);
} else {
$salt = '';
$valid = self::APRMD5_VALID;
for ($i = 0; $i < 8; ++$i) {
$salt .= $valid[mt_rand(0, 63)];
}
return $salt;
}
case 'crypt':
case 'crypt-des':
return $seed
? substr(preg_replace('|^{crypt}|i', '', $seed), 0, 2)
: substr(base64_encode(hash('md5', mt_rand(), true)), 0, 2);
case 'crypt-blowfish':
return $seed
? preg_replace('|^(?:{crypt})?(\$2.?\$(?:\d\d\$)?[0-9A-Za-z./]{22}).*|i', '$1', $seed)
: '$2$' . substr(base64_encode(hash('md5', sprintf('%08X%08X%08X', mt_rand(), mt_rand(), mt_rand()), true)), 0, 21) . '$';
case 'crypt-md5':
return $seed
? substr(preg_replace('|^{crypt}|i', '', $seed), 0, 12)
: '$1$' . base64_encode(hash('md5', sprintf('%08X%08X', mt_rand(), mt_rand()), true)) . '$';
case 'crypt-sha256':
return $seed
? substr(preg_replace('|^{crypt}|i', '', $seed), 0, strrpos($seed, '$'))
: '$5$' . base64_encode(hash('md5', sprintf('%08X%08X%08X', mt_rand(), mt_rand(), mt_rand()), true)) . '$';
case 'crypt-sha512':
return $seed
? substr(preg_replace('|^{crypt}|i', '', $seed), 0, strrpos($seed, '$'))
: '$6$' . base64_encode(hash('md5', sprintf('%08X%08X%08X', mt_rand(), mt_rand(), mt_rand()), true)) . '$';
case 'joomla-md5':
$split = preg_split('/:/', $seed );
return $split ? $split[1] : '';
case 'sha256':
case 'ssha256':
return $seed
? substr(base64_decode(preg_replace('|^{SSHA256}|i', '', $seed)), 32)
: substr(pack('H*', hash('sha256', substr(pack('h*', hash('md5', mt_rand())), 0, 8) . $plaintext)), 0, 4);
case 'smd5':
return $seed
? substr(base64_decode(preg_replace('|^{SMD5}|i', '', $seed)), 16)
: substr(pack('H*', hash('md5', substr(pack('h*', hash('md5', mt_rand())), 0, 8) . $plaintext)), 0, 4);
case 'ssha':
return $seed
? substr(base64_decode(preg_replace('|^{SSHA}|i', '', $seed)), 20)
: substr(pack('H*', hash('sha1', substr(pack('h*', hash('md5', mt_rand())), 0, 8) . $plaintext)), 0, 4);
default:
return '';
}
}
/**
* Converts to allowed 64 characters for APRMD5 passwords.
*
* @param string $value The value to convert
* @param integer $count The number of iterations
*
* @return string $value converted to the 64 MD5 characters.
*/
protected static function _toAPRMD5($value, $count)
{
$aprmd5 = '';
$count = abs($count);
$valid = self::APRMD5_VALID;
while (--$count) {
$aprmd5 .= $valid[$value & 0x3f];
$value >>= 6;
}
return $aprmd5;
}
/**
* Generates a random, hopefully pronounceable, password. This can be used
* when resetting automatically a user's password.
*
* @return string A random password
*/
public static function genRandomPassword()
{
/* Alternate consonant and vowel random chars with two random numbers
* at the end. This should produce a fairly pronounceable password. */
return substr(self::CONSONANTS, mt_rand(0, strlen(self::CONSONANTS) - 1), 1) .
substr(self::VOWELS, mt_rand(0, strlen(self::VOWELS) - 1), 1) .
substr(self::CONSONANTS, mt_rand(0, strlen(self::CONSONANTS) - 1), 1) .
substr(self::VOWELS, mt_rand(0, strlen(self::VOWELS) - 1), 1) .
substr(self::CONSONANTS, mt_rand(0, strlen(self::CONSONANTS) - 1), 1) .
substr(self::NUMBERS, mt_rand(0, strlen(self::NUMBERS) - 1), 1) .
substr(self::NUMBERS, mt_rand(0, strlen(self::NUMBERS) - 1), 1);
}
/**
* Checks whether a password matches some expected policy.
*
* @param string $password A password.
* @param array $policy A configuration with policy rules. Supported
* rules:
*
* - minLength: Minimum length of the password
* - maxLength: Maximum length of the password
* - maxSpace: Maximum number of white space characters
*
* The following are the types of characters required in a
* password. Either specific characters, character classes,
* or both can be required. Specific types are:
*
* - minUpper: Minimum number of uppercase characters
* - minLower: Minimum number of lowercase characters
* - minNumeric: Minimum number of numeric characters (0-9)
* - minAlphaNum: Minimum number of alphanumeric characters
* - minAlpha: Minimum number of alphabetic characters
* - minSymbol: Minimum number of punctuation / symbol characters
* - minNonAlpha: Minimum number of non-alphabetic characters
*
* Alternatively (or in addition to), the minimum number of
* character classes can be configured by setting the
* following. The valid range is 0 through 4 character
* classes may be required for a password. The classes are:
* 'upper', 'lower', 'number', and 'symbol'. For example: A
* password of 'p@ssw0rd' satisfies three classes ('number',
* 'lower', and 'symbol'), while 'passw0rd' only satisfies two
* classes ('lower' and 'number').
*
* - minClasses: Minimum number (0 through 4) of character
* classes.
*
* @throws Horde_Auth_Exception if the password does not match the policy.
*/
public static function checkPasswordPolicy($password, array $policy)
{
// Check max/min lengths if specified in the policy.
if (isset($policy['minLength']) &&
strlen($password) < $policy['minLength']) {
throw new Horde_Auth_Exception(sprintf(Horde_Auth_Translation::t("The password must be at least %d characters long!"), $policy['minLength']));
}
if (isset($policy['maxLength']) &&
strlen($password) > $policy['maxLength']) {
throw new Horde_Auth_Exception(sprintf(Horde_Auth_Translation::t("The password is too long; passwords may not be more than %d characters long!"), $policy['maxLength']));
}
// Dissect the password in a localized way.
$classes = array();
$alpha = $nonalpha = $alnum = $num = $upper = $lower = $space = $symbol = 0;
for ($i = 0; $i < strlen($password); $i++) {
$char = substr($password, $i, 1);
if (ctype_lower($char)) {
$lower++; $alpha++; $alnum++; $classes['lower'] = 1;
} elseif (ctype_upper($char)) {
$upper++; $alpha++; $alnum++; $classes['upper'] = 1;
} elseif (ctype_digit($char)) {
$num++; $nonalpha++; $alnum++; $classes['number'] = 1;
} elseif (ctype_punct($char)) {
$symbol++; $nonalpha++; $classes['symbol'] = 1;
} elseif (ctype_space($char)) {
$space++; $classes['symbol'] = 1;
}
}
// Check reamaining password policy options.
if (isset($policy['minUpper']) && $policy['minUpper'] > $upper) {
throw new Horde_Auth_Exception(sprintf(Horde_Auth_Translation::ngettext("The password must contain at least %d uppercase character.", "The password must contain at least %d uppercase characters.", $policy['minUpper']), $policy['minUpper']));
}
if (isset($policy['minLower']) && $policy['minLower'] > $lower) {
throw new Horde_Auth_Exception(sprintf(Horde_Auth_Translation::ngettext("The password must contain at least %d lowercase character.", "The password must contain at least %d lowercase characters.", $policy['minLower']), $policy['minLower']));
}
if (isset($policy['minNumeric']) && $policy['minNumeric'] > $num) {
throw new Horde_Auth_Exception(sprintf(Horde_Auth_Translation::ngettext("The password must contain at least %d numeric character.", "The password must contain at least %d numeric characters.", $policy['minNumeric']), $policy['minNumeric']));
}
if (isset($policy['minAlpha']) && $policy['minAlpha'] > $alpha) {
throw new Horde_Auth_Exception(sprintf(Horde_Auth_Translation::ngettext("The password must contain at least %d alphabetic character.", "The password must contain at least %d alphabetic characters.", $policy['minAlpha']), $policy['minAlpha']));
}
if (isset($policy['minAlphaNum']) && $policy['minAlphaNum'] > $alnum) {
throw new Horde_Auth_Exception(sprintf(Horde_Auth_Translation::ngettext("The password must contain at least %d alphanumeric character.", "The password must contain at least %d alphanumeric characters.", $policy['minAlphaNum']), $policy['minAlphaNum']));
}
if (isset($policy['minNonAlpha']) && $policy['minNonAlpha'] > $nonalpha) {
throw new Horde_Auth_Exception(sprintf(Horde_Auth_Translation::ngettext("The password must contain at least %d numeric or special character.", "The password must contain at least %d numeric or special characters.", $policy['minNonAlpha']), $policy['minNonAlpha']));
}
if (isset($policy['minClasses']) && $policy['minClasses'] > array_sum($classes)) {
throw new Horde_Auth_Exception(sprintf(Horde_Auth_Translation::t("The password must contain at least %d different types of characters. The types are: lower, upper, numeric, and symbols."), $policy['minClasses']));
}
if (isset($policy['maxSpace']) && $policy['maxSpace'] < $space) {
if ($policy['maxSpace'] > 0) {
throw new Horde_Auth_Exception(sprintf(Horde_Auth_Translation::t("The password must contain less than %d whitespace characters."), $policy['maxSpace'] + 1));
}
throw new Horde_Auth_Exception(Horde_Auth_Translation::t("The password must not contain whitespace characters."));
}
if (isset($policy['minSymbol']) && $policy['minSymbol'] > $symbol) {
throw new Horde_Auth_Exception(sprintf(Horde_Auth_Translation::ngettext("The password must contain at least %d symbol character.", "The password must contain at least %d symbol characters.", $policy['minSymbol']), $policy['minSymbol']));
}
}
/**
* Checks whether a password is too similar to a dictionary of strings.
*
* @param string $password A password.
* @param array $dict A dictionary to check for similarity, for
* example the user name or an old password.
* @param float $max The maximum allowed similarity in percent.
*
* @throws Horde_Auth_Exception if the password is too similar.
*/
public static function checkPasswordSimilarity($password, array $dict,
$max = 80)
{
// Check for pass == dict, simple reverse strings, etc.
foreach ($dict as $test) {
if ((strcasecmp($password, $test) == 0) ||
(strcasecmp($password, strrev($test)) == 0)) {
throw new Horde_Auth_Exception(Horde_Auth_Translation::t("The password is too simple to guess."));
}
}
// Check for percentages similarity also. This will catch very simple
// Things like "password" -> "password2" or "xpasssword"...
// Also, don't allow simple changing of capitalization to pass
foreach ($dict as $test) {
similar_text(Horde_String::lower($password), Horde_String::lower($test), $percent);
if ($percent > $max) {
throw new Horde_Auth_Exception(Horde_Auth_Translation::t("The password is too simple to guess."));
}
}
}
}
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