X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=crypto%2Fhash.c;h=7dcff671c19b6d91a6127467b57c4db91a23fff4;hb=56e252c7484c3ebc058f3c22d4a75386b079c49c;hp=4ccd22deef399aa477ba9e5c958d1516ff5dc50f;hpb=15700770ef7c5d12e2f1659d2ddbeb3f658d9f37;p=linux-2.6-omap-h63xx.git

diff --git a/crypto/hash.c b/crypto/hash.c
index 4ccd22deef3..7dcff671c19 100644
--- a/crypto/hash.c
+++ b/crypto/hash.c
@@ -12,6 +12,7 @@
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/seq_file.h>
 
 #include "internal.h"
@@ -22,6 +23,42 @@ static unsigned int crypto_hash_ctxsize(struct crypto_alg *alg, u32 type,
 	return alg->cra_ctxsize;
 }
 
+static int hash_setkey_unaligned(struct crypto_hash *crt, const u8 *key,
+		                 unsigned int keylen)
+{
+	struct crypto_tfm *tfm = crypto_hash_tfm(crt);
+	struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
+	unsigned long alignmask = crypto_hash_alignmask(crt);
+	int ret;
+	u8 *buffer, *alignbuffer;
+	unsigned long absize;
+
+	absize = keylen + alignmask;
+	buffer = kmalloc(absize, GFP_ATOMIC);
+	if (!buffer)
+		return -ENOMEM;
+
+	alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
+	memcpy(alignbuffer, key, keylen);
+	ret = alg->setkey(crt, alignbuffer, keylen);
+	memset(alignbuffer, 0, keylen);
+	kfree(buffer);
+	return ret;
+}
+
+static int hash_setkey(struct crypto_hash *crt, const u8 *key,
+		       unsigned int keylen)
+{
+	struct crypto_tfm *tfm = crypto_hash_tfm(crt);
+	struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
+	unsigned long alignmask = crypto_hash_alignmask(crt);
+
+	if ((unsigned long)key & alignmask)
+		return hash_setkey_unaligned(crt, key, keylen);
+
+	return alg->setkey(crt, key, keylen);
+}
+
 static int crypto_init_hash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
 {
 	struct hash_tfm *crt = &tfm->crt_hash;
@@ -34,7 +71,7 @@ static int crypto_init_hash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
 	crt->update = alg->update;
 	crt->final = alg->final;
 	crt->digest = alg->digest;
-	crt->setkey = alg->setkey;
+	crt->setkey = hash_setkey;
 	crt->digestsize = alg->digestsize;
 
 	return 0;