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AESexpandKey4

void AESexpandKey4( char far * expanded, char far * key );

Description

Prepares a key for use by expanding it into a set of round keys. A key is a "password" to decipher encoded data.

This function is specific to AES with 128-bit key. See AESexpandKey() for a more general function (available with Rabbit Embedded Security Pack).

Parameters

expanded

A buffer for storing the expanded key. The size of the expanded key, for a 128-bit key, is 176 bytes. Other key sizes are not supported by this function.

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

AESexpandKey4(state->expanded_key, key);

key

The cipher key, 16 bytes

Return value

None.

Library

AES_CORE.LIB