Edit Infobox 3DS Homebrews: Cro tool 3DS

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This tool is used to allow the modification of [http://3dbrew.org/wiki/CRO0 CRO libraries] on 3DSes under FIRMs with PS:VerifyRsaSha256 patched in some form. On pirate CFWs, this is patched already. ARM11-based hacks which allow for romfs-file replacement won't work with this. This is done by rebuilding hashes for each CRO file, then rehashing and resigning the CRR file based on those. A static RSA key is used for signing, since a hash of the latter half of the CRR must be signed even with VerifyRsaSha256 patched. ==User guide== To use, put cro_tool in a folder with all CRO files from the target application. Afterward, just use cro_tool [-v] static.crr or drag-n-drop static.crr onto cro_tool. An invalid Nintendo signature is the intended behavior after resigning a crr with this tool. ==Changelog== '''1.1''' * Do hash verification how RO does it (just ensure the hash exists in the CRR hashtable, position-independent). * Scan for cro files instead of user-specifying them. ==Credits== Thanks to 3DSguy and neimod for ctrtool, which this tool was hastily built off of. ==External links== * GBAtemp - https://gbatemp.net/threads/release-cro_tool-cro-resigner-for-rom-hacks-etc.395148

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