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SD title export (view source)

6 bytes added , 16:58, 22 December 2009

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An ES block, for lack of a better name, is a commonly used data encryption method on DSi by Nintendo.

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It uses AES CCM to encrypt a maximum of 0x20000 bytes of data per time, and extends it with a 32 byte ~~encrypted~~ trail block at the end.

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It uses AES CCM to encrypt a maximum of 0x20000 bytes of data per time, and extends it with a 32 byte trail block at the end.

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~~This~~ trail block itself is encrypted with AES CTR, and contains the nonce for decryption and size of the ES block:

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The last 16 bytes of trail block itself is encrypted with AES CTR, and contains the nonce for decryption and size of the ES block:

0000000: qq qq qq qq qq qq qq qq qq qq qq qq qq qq qq qq

0000010: xx nn nn nn nn nn nn nn nn nn nn nn nn yy yy yy

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