X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=crypto%2Fhmac.c;h=7ff2d6a8c7d0b5c58b753140cd579e332e385819;hb=e34f87256794b87e7f4a8f1812538be7b7b5214c;hp=b60c3c7aa320ba08548c050f4fc05d231321de61;hpb=e231c2ee64eb1c5cd3c63c31da9dac7d888dcf7f;p=linux-2.6-omap-h63xx.git

diff --git a/crypto/hmac.c b/crypto/hmac.c
index b60c3c7aa32..7ff2d6a8c7d 100644
--- a/crypto/hmac.c
+++ b/crypto/hmac.c
@@ -57,14 +57,35 @@ static int hmac_setkey(struct crypto_hash *parent,
 	if (keylen > bs) {
 		struct hash_desc desc;
 		struct scatterlist tmp;
+		int tmplen;
 		int err;
 
 		desc.tfm = tfm;
 		desc.flags = crypto_hash_get_flags(parent);
 		desc.flags &= CRYPTO_TFM_REQ_MAY_SLEEP;
-		sg_init_one(&tmp, inkey, keylen);
 
-		err = crypto_hash_digest(&desc, &tmp, keylen, digest);
+		err = crypto_hash_init(&desc);
+		if (err)
+			return err;
+
+		tmplen = bs * 2 + ds;
+		sg_init_one(&tmp, ipad, tmplen);
+
+		for (; keylen > tmplen; inkey += tmplen, keylen -= tmplen) {
+			memcpy(ipad, inkey, tmplen);
+			err = crypto_hash_update(&desc, &tmp, tmplen);
+			if (err)
+				return err;
+		}
+
+		if (keylen) {
+			memcpy(ipad, inkey, keylen);
+			err = crypto_hash_update(&desc, &tmp, keylen);
+			if (err)
+				return err;
+		}
+
+		err = crypto_hash_final(&desc, digest);
 		if (err)
 			return err;
 
@@ -205,6 +226,7 @@ static struct crypto_instance *hmac_alloc(struct rtattr **tb)
 	struct crypto_instance *inst;
 	struct crypto_alg *alg;
 	int err;
+	int ds;
 
 	err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_HASH);
 	if (err)
@@ -215,6 +237,13 @@ static struct crypto_instance *hmac_alloc(struct rtattr **tb)
 	if (IS_ERR(alg))
 		return ERR_CAST(alg);
 
+	inst = ERR_PTR(-EINVAL);
+	ds = (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
+	     CRYPTO_ALG_TYPE_HASH ? alg->cra_hash.digestsize :
+				    alg->cra_digest.dia_digestsize;
+	if (ds > alg->cra_blocksize)
+		goto out_put_alg;
+
 	inst = crypto_alloc_instance("hmac", alg);
 	if (IS_ERR(inst))
 		goto out_put_alg;
@@ -225,14 +254,10 @@ static struct crypto_instance *hmac_alloc(struct rtattr **tb)
 	inst->alg.cra_alignmask = alg->cra_alignmask;
 	inst->alg.cra_type = &crypto_hash_type;
 
-	inst->alg.cra_hash.digestsize =
-		(alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
-		CRYPTO_ALG_TYPE_HASH ? alg->cra_hash.digestsize :
-				       alg->cra_digest.dia_digestsize;
+	inst->alg.cra_hash.digestsize = ds;
 
 	inst->alg.cra_ctxsize = sizeof(struct hmac_ctx) +
-				ALIGN(inst->alg.cra_blocksize * 2 +
-				      inst->alg.cra_hash.digestsize,
+				ALIGN(inst->alg.cra_blocksize * 2 + ds,
 				      sizeof(void *));
 
 	inst->alg.cra_init = hmac_init_tfm;