Add options for Courier authlib authentication to user_sql.php

Availible options:
courier_md5 – base64-encoded md5
courier_md5raw – hexadecimal md5
courier_sha1 – base64-encoded sha1
courier_sha256 – base64-encoded sha256

Author: Nullcaller

lib/user_sql.php

@@ -353,6 +353,22 @@ public function setPassword($uid, $password)
         elseif($this -> settings['set_crypt_type'] === 'password_hash')
         {
                     $enc_password = $this->pw_hash($password);
+        }
+        elseif($this -> settings['set_crypt_type'] === 'courier_md5')
+        {
+            $enc_password = '{MD5}'.OC_USER_SQL::hex_to_base64(md5($password));
+        }
+        elseif($this -> settings['set_crypt_type'] === 'courier_md5raw')
+        {
+            $enc_password = '{MD5RAW}'.md5($password);
+        }
+        elseif($this -> settings['set_crypt_type'] === 'courier_sha1')
+        {
+            $enc_password = '{SHA}'.OC_USER_SQL::hex_to_base64(sha1($password));
+        }
+        elseif($this -> settings['set_crypt_type'] === 'courier_sha256')
+        {
+            $enc_password = '{SHA256}'.OC_USER_SQL::hex_to_base64(hash('sha256', $password, false));
         }
          else
         {
@@ -422,10 +438,26 @@ public function checkPassword($uid, $password)
                 return false;
             $ret = sha1($salt['salt'].sha1($password)) === $db_pass;
         }
-        
+
         elseif($this -> settings['set_crypt_type'] == 'sha1')
         {
             $ret = $this->hash_equals(sha1($password) , $db_pass);
+        }
+        elseif($this -> settings['set_crypt_type'] === 'courier_md5')
+        {
+            $ret = '{MD5}'.OC_USER_SQL::hex_to_base64(md5($password)) === $db_pass;
+        }
+        elseif($this -> settings['set_crypt_type'] === 'courier_md5raw')
+        {
+            $ret = '{MD5RAW}'.md5($password) === $db_pass;
+        }
+        elseif($this -> settings['set_crypt_type'] === 'courier_sha1')
+        {
+            $ret = '{SHA}'.OC_USER_SQL::hex_to_base64(sha1($password)) === $db_pass;
+        }
+        elseif($this -> settings['set_crypt_type'] === 'courier_sha256')
+        {
+            $ret = '{SHA256}'.OC_USER_SQL::hex_to_base64(hash('sha256', $password, false)) === $db_pass;
         } else
 
         {
@@ -974,7 +1006,16 @@ function hash_equals( $a, $b ) {
         }
 
         return $result === 0;
-}
+    }
 
-}
+    private static function hex_to_base64($hex)
+    {
+        $hex_chr = '';
+        foreach(str_split($hex, 2) as $hexpair)
+        {
+            $hex_chr .= chr(hexdec($hexpair));
+        }
+        return base64_encode($hex_chr);
+    }
 
+}