cocos2d/cocos2d-x — pull request #2463 by tiantian20007 (2013-04-26 07:46:24+00:00)
Title: Add decryption for pvr.ccz file encrypted by textPacker

Referring to http://www.codeandweb.com/texturepacker/contentprotection
Just call ZipUtils::caw_setkey_part to set your encryption code;