Bug #59632 Assertion failed: arg_length > length

The problem was overflow in max_length when we tried to des_decrypt()
something which is not the output of des_encrypt()


mysql-test/r/ssl_and_innodb.result:
  New test case.
mysql-test/t/ssl_and_innodb.test:
  New test case.
sql/item_strfunc.h:
  Do not subtract the encrypt overhead (9U) if args[0] has length < 9
  (In unsigned arithmetic, (1-9) becomes a very large number)

mysql-test/r/ssl_and_innodb.result

@@ -0,0 +1,8 @@
+CREATE TABLE t1(a int) engine=innodb;
+INSERT INTO t1 VALUES (1);
+SELECT DISTINCT
+convert((SELECT des_decrypt(2,1) AS a FROM t1 WHERE @a:=1), signed) as d
+FROM t1 ;
+d
+2
+DROP TABLE t1;