http://firestuff.org/wordpress/wp-content/uploads/2006/03/base64.sql
FUNCTION BASE64_DECODE (input BLOB) RETURNS BLOB
FUNCTION BASE64_ENCODE (input BLOB) RETURNS BLOB
-- base64.sql - MySQL base64 encoding/decoding functions
-- Copyright (C) 2006 Ian Gulliver
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of version 2 of the GNU General Public License as
-- published by the Free Software Foundation.
--
-- 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
delimiter
DROP TABLE IF EXISTS base64_data
CREATE TABLE base64_data (c CHAR(1) BINARY, val TINYINT)
INSERT INTO base64_data VALUES
('A',0), ('B',1), ('C',2), ('D',3), ('E',4), ('F',5), ('G',6), ('H',7), ('I',8), ('J',9),
('K',10), ('L',11), ('M',12), ('N',13), ('O',14), ('P',15), ('Q',16), ('R',17), ('S',18), ('T',19),
('U',20), ('V',21), ('W',22), ('X',23), ('Y',24), ('Z',25), ('a',26), ('b',27), ('c',28), ('d',29),
('e',30), ('f',31), ('g',32), ('h',33), ('i',34), ('j',35), ('k',36), ('l',37), ('m',38), ('n',39),
('o',40), ('p',41), ('q',42), ('r',43), ('s',44), ('t',45), ('u',46), ('v',47), ('w',48), ('x',49),
('y',50), ('z',51), ('0',52), ('1',53), ('2',54), ('3',55), ('4',56), ('5',57), ('6',58), ('7',59),
('8',60), ('9',61), ('+',62), ('/',63), ('=',0)
DROP FUNCTION IF EXISTS BASE64_DECODE
CREATE FUNCTION BASE64_DECODE (input BLOB)
RETURNS BLOB
CONTAINS SQL
DETERMINISTIC
SQL SECURITY INVOKER
BEGIN
DECLARE ret BLOB DEFAULT '';
DECLARE done TINYINT DEFAULT 0;
IF input IS NULL THEN
RETURN NULL;
END IF;
each_block:
WHILE NOT done DO BEGIN
DECLARE accum_value BIGINT UNSIGNED DEFAULT 0;
DECLARE in_count TINYINT DEFAULT 0;
DECLARE out_count TINYINT DEFAULT 3;
each_input_char:
WHILE in_count < first_char =" SUBSTRING(input,1,1);" input =" SUBSTRING(input,2);" c =" first_char;" error =" 1;" accum_value =" (accum_value" in_count =" in_count" first_char =" '=" done =" 1;" out_count =" out_count"> 0 DO BEGIN
SET ret = CONCAT(ret,CHAR((accum_value & 0xff0000) >> 16));
SET out_count = out_count - 1;
SET accum_value = (accum_value <<>CREATE FUNCTION BASE64_ENCODE (input BLOB)
RETURNS BLOB
CONTAINS SQL
DETERMINISTIC
SQL SECURITY INVOKER
BEGIN
DECLARE ret BLOB DEFAULT '';
DECLARE done TINYINT DEFAULT 0;
IF input IS NULL THEN
RETURN NULL;
END IF;
each_block:
WHILE NOT done DO BEGIN
DECLARE accum_value BIGINT UNSIGNED DEFAULT 0;
DECLARE in_count TINYINT DEFAULT 0;
DECLARE out_count TINYINT;
each_input_char:
WHILE in_count < done =" 1;" accum_value =" accum_value" first_char =" SUBSTRING(input,1,1);" input =" SUBSTRING(input,2);" accum_value =" (accum_value" in_count =" in_count" in_count =" 3" out_count =" 4;" in_count =" 2" out_count =" 3;" in_count =" 1" out_count =" 2;"> 0 DO BEGIN
BEGIN
DECLARE out_char CHAR(1);
DECLARE base64_getval CURSOR FOR SELECT c FROM base64_data WHERE val = (accum_value >> 18);
OPEN base64_getval;
FETCH base64_getval INTO out_char;
CLOSE base64_getval;
SET ret = CONCAT(ret,out_char);
SET out_count = out_count - 1;
SET accum_value = accum_value << in_count =" 2" ret =" CONCAT(ret,'=" in_count =" 1" ret =" CONCAT(ret,'=">
