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authorHerbert Xu <herbert@gondor.apana.org.au>2008-11-08 08:56:57 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2008-12-25 11:02:06 +1100
commit3751f402e099893c34089ed303dca6f5f92dbfd1 (patch)
treeb052aa508f5c82478fb90a1525bfd854644406df /crypto
parentb812eb0076235743872b5c9d18714d2324cc668d (diff)
downloadconfigs-3751f402e099893c34089ed303dca6f5f92dbfd1.tar.gz
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>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/ahash.c8
-rw-r--r--crypto/shash.c3
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);