Description:
------------
A range of PHPTs fail on PHP 6 where they pass on PHP 5.2/5.3. In 
many cases it looks like the function returns different output from 
encryption/decryption calls. The following failing tests are all 
checked into PHP 6 and marked with an XFAIL section:

mcrypt_cbc_3des_encrypt.phpt
mcrypt_cbc_3des_decrypt.phpt
mcrypt_cbc_variation4.phpt
mcrypt_cbc_variation5.phpt
mcrypt_rijndael128_128BitKey.phpt
mcrypt_rijndael128_256BitKey.phpt
mcrypt_decrypt_3des_cbc.phpt
mcrypt_decrypt_variation5.phpt
mcrypt_encrypt_3des_cbc.phpt
mcrypt_encrypt_variation5.phpt
mcrypt_ecb_variation4.phpt

The problem may be common to all the failing tests and looks like 
something has changed with different length initialisation vectors.

Reproduce code:
---------------
(See the tests checked into CVS)

Expected result:
----------------
For example, the mcrypt_cbc_3des_decrypt.phpt test expects:

--- testing different iv lengths

iv length=4

Warning: mcrypt_cbc(): The IV parameter must be as long as the 
blocksize in %s on line %d
unicode(32) "736563726574206d6573736167650000"

iv length=8
unicode(32) "736563726574206d6573736167650000"

iv length=9

Warning: mcrypt_cbc(): The IV parameter must be as long as the 
blocksize in %s on line %d
unicode(32) "736563726574206d6573736167650000"




Actual result:
--------------
iv length=4

Warning: mcrypt_cbc(): The IV parameter must be as long as the 
blocksize in D:\Testing\php-6.0\mcrypt_cbc_3des_decrypt.php on line 
52
unicode(32) "425750466574206d6573736167650000"

iv length=8
unicode(32) "736563726574206d6573736167650000"

iv length=9

Warning: mcrypt_cbc(): The IV parameter must be as long as the 
blocksize in D:\Testing\php-6.0\mcrypt_cbc_3des_decrypt.php on line 
52
unicode(32) "42575046504217556573736167650000"