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[CRYPTO] ctr: Refactor into ctr and rfc3686

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As discussed previously, this patch moves the basic CTR functionality
into a chainable algorithm called ctr.  The IPsec-specific variant of
it is now placed on top with the name rfc3686.

So ctr(aes) gives a chainable cipher with IV size 16 while the IPsec
variant will be called rfc3686(ctr(aes)).  This patch also adjusts
gcm accordingly.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2007-12-17 21:34:32 +08:00
parent 653ebd9c85
commit 5311f248b7
4 changed files with 233 additions and 136 deletions
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20
include/crypto/ctr.h Normal file
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@ -0,0 +1,20 @@
/*
* CTR: Counter mode
*
* Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#ifndef _CRYPTO_CTR_H
#define _CRYPTO_CTR_H
#define CTR_RFC3686_NONCE_SIZE 4
#define CTR_RFC3686_IV_SIZE 8
#define CTR_RFC3686_BLOCK_SIZE 16
#endif /* _CRYPTO_CTR_H */