This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.

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Code Reference Classes phpBB phpBB::_hash_crypt_private()

phpBB::_hash_crypt_private( $password,  $setting,  $itoa64 )

The crypt function/replacement

Description

Source

File: bp-forums/admin/converters/phpBB.php

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private function _hash_crypt_private( $password, $setting, &$itoa64 ) {
    $output = '*';
 
    // Check for correct hash
    if ( substr( $setting, 0, 3 ) != '$H$' ) {
        return $output;
    }
 
    $count_log2 = strpos( $itoa64, $setting[3] );
 
    if ( $count_log2 < 7 || $count_log2 > 30 ) {
        return $output;
    }
 
    $count = 1 << $count_log2;
    $salt  = substr( $setting, 4, 8 );
 
    if ( strlen( $salt ) != 8 ) {
        return $output;
    }
 
    /**
     * We're kind of forced to use MD5 here since it's the only
     * cryptographic primitive available in all versions of PHP
     * currently in use.  To implement our own low-level crypto
     * in PHP would result in much worse performance and
     * consequently in lower iteration counts and hashes that are
     * quicker to crack (by non-PHP code).
     */
    if ( floatval( phpversion() ) >= 5 ) {
        $hash = md5( $salt . $password, true );
        do
        {
            $hash = md5( $hash . $password, true );
        }
        while ( --$count );
    } else {
        $hash = pack( 'H*', md5( $salt . $password ) );
        do {
            $hash = pack( 'H*', md5( $hash . $password ) );
        }
        while ( --$count );
    }
 
    $output = substr($setting, 0, 12);
    $output .= $this->_hash_encode64($hash, 16, $itoa64);
 
    return $output;
}

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