X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fs390%2Fcrypto%2Fsha256_s390.c;h=8e4e67503fe7f8df35fa8817109d945763001084;hb=c9802cd9574a80444e689c7525627b40d7dc3a06;hp=b75bdbd476c7384c2dbc891964ee8e9c52f2b117;hpb=57d1c91fa6d9146b309b7511f6432dea2a24858b;p=pandora-kernel.git

diff --git a/arch/s390/crypto/sha256_s390.c b/arch/s390/crypto/sha256_s390.c
index b75bdbd476c7..8e4e67503fe7 100644
--- a/arch/s390/crypto/sha256_s390.c
+++ b/arch/s390/crypto/sha256_s390.c
@@ -31,9 +31,9 @@ struct s390_sha256_ctx {
 	u8 buf[2 * SHA256_BLOCK_SIZE];
 };
 
-static void sha256_init(void *ctx)
+static void sha256_init(struct crypto_tfm *tfm)
 {
-	struct s390_sha256_ctx *sctx = ctx;
+	struct s390_sha256_ctx *sctx = crypto_tfm_ctx(tfm);
 
 	sctx->state[0] = 0x6a09e667;
 	sctx->state[1] = 0xbb67ae85;
@@ -44,13 +44,14 @@ static void sha256_init(void *ctx)
 	sctx->state[6] = 0x1f83d9ab;
 	sctx->state[7] = 0x5be0cd19;
 	sctx->count = 0;
-	memset(sctx->buf, 0, sizeof(sctx->buf));
 }
 
-static void sha256_update(void *ctx, const u8 *data, unsigned int len)
+static void sha256_update(struct crypto_tfm *tfm, const u8 *data,
+			  unsigned int len)
 {
-	struct s390_sha256_ctx *sctx = ctx;
+	struct s390_sha256_ctx *sctx = crypto_tfm_ctx(tfm);
 	unsigned int index;
+	int ret;
 
 	/* how much is already in the buffer? */
 	index = sctx->count / 8 & 0x3f;
@@ -58,15 +59,29 @@ static void sha256_update(void *ctx, const u8 *data, unsigned int len)
 	/* update message bit length */
 	sctx->count += len * 8;
 
-	/* process one block */
-	if ((index + len) >= SHA256_BLOCK_SIZE) {
+	if ((index + len) < SHA256_BLOCK_SIZE)
+		goto store;
+
+	/* process one stored block */
+	if (index) {
 		memcpy(sctx->buf + index, data, SHA256_BLOCK_SIZE - index);
-		crypt_s390_kimd(KIMD_SHA_256, sctx->state, sctx->buf,
-				SHA256_BLOCK_SIZE);
+		ret = crypt_s390_kimd(KIMD_SHA_256, sctx->state, sctx->buf,
+				      SHA256_BLOCK_SIZE);
+		BUG_ON(ret != SHA256_BLOCK_SIZE);
 		data += SHA256_BLOCK_SIZE - index;
 		len -= SHA256_BLOCK_SIZE - index;
 	}
 
+	/* process as many blocks as possible */
+	if (len >= SHA256_BLOCK_SIZE) {
+		ret = crypt_s390_kimd(KIMD_SHA_256, sctx->state, data,
+				      len & ~(SHA256_BLOCK_SIZE - 1));
+		BUG_ON(ret != (len & ~(SHA256_BLOCK_SIZE - 1)));
+		data += ret;
+		len -= ret;
+	}
+
+store:
 	/* anything left? */
 	if (len)
 		memcpy(sctx->buf + index , data, len);
@@ -93,9 +108,9 @@ static void pad_message(struct s390_sha256_ctx* sctx)
 }
 
 /* Add padding and return the message digest */
-static void sha256_final(void* ctx, u8 *out)
+static void sha256_final(struct crypto_tfm *tfm, u8 *out)
 {
-	struct s390_sha256_ctx *sctx = ctx;
+	struct s390_sha256_ctx *sctx = crypto_tfm_ctx(tfm);
 
 	/* must perform manual padding */
 	pad_message(sctx);
@@ -112,6 +127,8 @@ static void sha256_final(void* ctx, u8 *out)
 
 static struct crypto_alg alg = {
 	.cra_name	=	"sha256",
+	.cra_driver_name =	"sha256-s390",
+	.cra_priority	=	CRYPT_S390_PRIORITY,
 	.cra_flags	=	CRYPTO_ALG_TYPE_DIGEST,
 	.cra_blocksize	=	SHA256_BLOCK_SIZE,
 	.cra_ctxsize	=	sizeof(struct s390_sha256_ctx),
@@ -119,9 +136,9 @@ static struct crypto_alg alg = {
 	.cra_list	=	LIST_HEAD_INIT(alg.cra_list),
 	.cra_u		=	{ .digest = {
 	.dia_digestsize	=	SHA256_DIGEST_SIZE,
-	.dia_init   	= 	sha256_init,
-	.dia_update 	=	sha256_update,
-	.dia_final  	=	sha256_final } }
+	.dia_init	=	sha256_init,
+	.dia_update	=	sha256_update,
+	.dia_final	=	sha256_final } }
 };
 
 static int init(void)