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AESdecrypt4x4

void AESdecrypt4x4( char far * expandedkey, char far * crypt, char far * plain );

Description

Decrypts a block of data using an implementation of the Rijndael AES cipher with a 128-bit key and block size.

The encrypted block of data may be overwritten by the decrypted block of data.

Parameters

expandedkey

A set of round keys (generated by AESexpandKey4()) from a 16-byte (128 bit) key.

Total of 176 bytes (44 longwords)

Note: when using an AESstreamState structure (e.g. "state") then call this function using:

AESdecrypt4x4(state->expanded_key, plain, crypt);

crypt

A block of 16 bytes of ciphertext to be decrypted; "crypt" and "plain" may point to the same place.

plain

A block of 16 bytes of resulting plaintext data; "crypt" and "plain" may point to the same place.

Library

AES_CORE.LIB