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[CRYPTO] aead: Make authsize a run-time parameter

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As it is authsize is an algorithm paramter which cannot be changed at
run-time.  This is inconvenient because hardware that implements such
algorithms would have to register each authsize that they support
separately.

Since authsize is a property common to all AEAD algorithms, we can add
a function setauthsize that sets it at run-time, just like setkey.

This patch does exactly that and also changes authenc so that authsize
is no longer a parameter of its template.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2007-12-02 18:49:21 +11:00
parent e29bc6ad0e
commit 7ba683a6de
4 changed files with 38 additions and 32 deletions
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5
include/linux/crypto.h
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@ -187,11 +187,12 @@ struct ablkcipher_alg {
struct aead_alg {
int (*setkey)(struct crypto_aead *tfm, const u8 *key,
unsigned int keylen);
int (*setauthsize)(struct crypto_aead *tfm, unsigned int authsize);
int (*encrypt)(struct aead_request *req);
int (*decrypt)(struct aead_request *req);
unsigned int ivsize;
unsigned int authsize;
unsigned int maxauthsize;
};
struct blkcipher_alg {
@ -754,6 +755,8 @@ static inline int crypto_aead_setkey(struct crypto_aead *tfm, const u8 *key,
return crypto_aead_crt(tfm)->setkey(tfm, key, keylen);
}
int crypto_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize);
static inline struct crypto_aead *crypto_aead_reqtfm(struct aead_request *req)
{
return __crypto_aead_cast(req->base.tfm);