crypto: hash - introduce crypto_hash_alg_has_setkey()

[pandora-kernel.git] / crypto / shash.c

diff --git a/crypto/shash.c b/crypto/shash.c
index 9100912..0d66c2e 100644 (file)
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -24,11 +24,12 @@
 
 static const struct crypto_type crypto_shash_type;
 
-static int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
-                          unsigned int keylen)
+int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
+                   unsigned int keylen)
 {
        return -ENOSYS;
 }
+EXPORT_SYMBOL_GPL(shash_no_setkey);
 
 static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key,
                                  unsigned int keylen)
@@ -273,12 +274,14 @@ static int shash_async_finup(struct ahash_request *req)
 
 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc)
 {
-       struct scatterlist *sg = req->src;
-       unsigned int offset = sg->offset;
        unsigned int nbytes = req->nbytes;
+       struct scatterlist *sg;
+       unsigned int offset;
        int err;
 
-       if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) {
+       if (nbytes &&
+           (sg = req->src, offset = sg->offset,
+            nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset))) {
                void *data;
 
                data = crypto_kmap(sg_page(sg), 0);
@@ -353,9 +356,10 @@ int crypto_init_shash_ops_async(struct crypto_tfm *tfm)
        crt->final = shash_async_final;
        crt->finup = shash_async_finup;
        crt->digest = shash_async_digest;
+       crt->setkey = shash_async_setkey;
+
+       crt->has_setkey = alg->setkey != shash_no_setkey;
 
-       if (alg->setkey)
-               crt->setkey = shash_async_setkey;
        if (alg->export)
                crt->export = shash_async_export;
        if (alg->import)
@@ -530,7 +534,8 @@ static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg)
        struct crypto_report_hash rhash;
        struct shash_alg *salg = __crypto_shash_alg(alg);
 
-       snprintf(rhash.type, CRYPTO_MAX_ALG_NAME, "%s", "shash");
+       strncpy(rhash.type, "shash", sizeof(rhash.type));
+
        rhash.blocksize = alg->cra_blocksize;
        rhash.digestsize = salg->digestsize;