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Index Word Description
0 Header code [0x080C0042]
1 Buffer size
2 10 | (Size<<4)
3 Signature buffer


Index Word Description
0 Header code
1 Result code


When u8 LocalFriendCodeSeed_state+0x21 == 0, this returns error 0xD8A103F8. This overwrites the LocalFriendCodeSeed RSA-signature data stored in memory(not the one stored in NAND) with the input data. This then writes u8 value zero to LocalFriendCodeSeed_state+0x20.

Setting +0x20 to zero results in most SecureInfo commands being unusable. For those to be usable again, CfgI:VerifySigSecureInfo must be used. The +0x20 u8 will only be restored to value 1 if CfgI:VerifySigSecureInfo is successful.