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[CRYPTO] authenc: Move enckeylen into key itself

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Having enckeylen as a template parameter makes it a pain for hardware
devices that implement ciphers with many key sizes since each one would
have to be registered separately.

Since the authenc algorithm is mainly used for legacy purposes where its
key is going to be constructed out of two separate keys, we can in fact
embed this value into the key itself.

This patch does this by prepending an rtnetlink header to the key that
contains the encryption key length.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2007-11-22 23:11:53 +08:00
commit e236d4a89a
2 changed files with 56 additions and 20 deletions
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27
include/crypto/authenc.h Normal file
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/*
* Authenc: Simple AEAD wrapper for IPsec
*
* 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_AUTHENC_H
#define _CRYPTO_AUTHENC_H
#include <linux/types.h>
enum {
CRYPTO_AUTHENC_KEYA_UNSPEC,
CRYPTO_AUTHENC_KEYA_PARAM,
};
struct crypto_authenc_key_param {
__be32 enckeylen;
};
#endif /* _CRYPTO_AUTHENC_H */