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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2008-11-08 08:56:57 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2008-12-25 11:02:06 +1100 |
| commit | 3751f402e099893c34089ed303dca6f5f92dbfd1 (patch) | |
| tree | b052aa508f5c82478fb90a1525bfd854644406df | |
| parent | b812eb0076235743872b5c9d18714d2324cc668d (diff) | |
crypto: hash - Make setkey optional
Since most cryptographic hash algorithms have no keys, this patch
makes the setkey function optional for ahash and shash.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/ahash.c | 8 | ||||
| -rw-r--r-- | crypto/shash.c | 3 |
2 files changed, 10 insertions, 1 deletions
diff --git a/crypto/ahash.c b/crypto/ahash.c index 9f98956b17f..ba5292d69eb 100644 --- a/crypto/ahash.c +++ b/crypto/ahash.c @@ -162,6 +162,12 @@ static int ahash_setkey(struct crypto_ahash *tfm, const u8 *key, return ahash->setkey(tfm, key, keylen); } +static int ahash_nosetkey(struct crypto_ahash *tfm, const u8 *key, + unsigned int keylen) +{ + return -ENOSYS; +} + int crypto_ahash_import(struct ahash_request *req, const u8 *in) { struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); @@ -194,7 +200,7 @@ static int crypto_init_ahash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) crt->update = alg->update; crt->final = alg->final; crt->digest = alg->digest; - crt->setkey = ahash_setkey; + crt->setkey = alg->setkey ? ahash_setkey : ahash_nosetkey; crt->digestsize = alg->digestsize; return 0; diff --git a/crypto/shash.c b/crypto/shash.c index 50d69a4e4b6..c9df367332f 100644 --- a/crypto/shash.c +++ b/crypto/shash.c @@ -55,6 +55,9 @@ int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, struct shash_alg *shash = crypto_shash_alg(tfm); unsigned long alignmask = crypto_shash_alignmask(tfm); + if (!shash->setkey) + return -ENOSYS; + if ((unsigned long)key & alignmask) return shash_setkey_unaligned(tfm, key, keylen); |