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94 bytes added ,  04:47, 7 June 2019
→‎Data Structure: add note about twlnand cmd files
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For SD contents, each AES-CMAC is generated by combining the NCCH header without the signature (0x100-0x1FF), the Content Index and Content ID at the end, both as u32. Then calculate the SHA256 of the data and generate the AES-CMAC using the [[AES Registers#Keyslots|SD/NAND AES-CMAC key]].
 
For SD contents, each AES-CMAC is generated by combining the NCCH header without the signature (0x100-0x1FF), the Content Index and Content ID at the end, both as u32. Then calculate the SHA256 of the data and generate the AES-CMAC using the [[AES Registers#Keyslots|SD/NAND AES-CMAC key]].
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For TWLNAND contents, the process is currently unknown.
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For TWLNAND contents, the process is currently unknown, but it appears to use a different keyslot(cmd file was identical even after a system format).
     
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