crypto: sha256-s390 - Add export/import support

This patch adds export/import support to sha256-s390. The exported type is defined by struct sha256_state, which is basically the entire descriptor state of sha256_generic. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sha256-s390 - Add export/import support
This patch adds export/import support to sha256-s390. The exported type is defined by struct sha256_state, which is basically the entire descriptor state of sha256_generic. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu
1 parent 406f104b41
Showing 1 changed file with 26 additions and 0 deletions Side-by-side Diff
arch/s390/crypto/sha256_s390.c
@@ -42,12 +42,38 @@
 	return 0;
 }
  
+static int sha256_export(struct shash_desc *desc, void *out)
+{
+	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
+	struct sha256_state *octx = out;
+
+	octx->count = sctx->count;
+	memcpy(octx->state, sctx->state, sizeof(octx->state));
+	memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
+	return 0;
+}
+
+static int sha256_import(struct shash_desc *desc, const u8 *in)
+{
+	struct sha256_state *sctx = shash_desc_ctx(desc);
+	struct sha256_state *ictx = in;
+
+	sctx->count = ictx->count;
+	memcpy(sctx->state, ictx->state, sizeof(ictx->state));
+	memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
+	sctx->func = KIMD_SHA_256;
+	return 0;
+}
+
 static struct shash_alg alg = {
 	.digestsize	=	SHA256_DIGEST_SIZE,
 	.init		=	sha256_init,
 	.update		=	s390_sha_update,
 	.final		=	s390_sha_final,
+	.export		=	sha256_export,
+	.import		=	sha256_import,
 	.descsize	=	sizeof(struct s390_sha_ctx),
+	.statesize	=	sizeof(struct sha256_state),
 	.base		=	{
 		.cra_name	=	"sha256",
 		.cra_driver_name=	"sha256-s390",
...	...	@@ -42,12 +42,38 @@
42	42	return 0;
43	43	}
44	44
	45	+static int sha256_export(struct shash_desc desc, void out)
	46	+{
	47	+ struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
	48	+ struct sha256_state *octx = out;
	49	+
	50	+ octx->count = sctx->count;
	51	+ memcpy(octx->state, sctx->state, sizeof(octx->state));
	52	+ memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
	53	+ return 0;
	54	+}
	55	+
	56	+static int sha256_import(struct shash_desc desc, const u8 in)
	57	+{
	58	+ struct sha256_state *sctx = shash_desc_ctx(desc);
	59	+ struct sha256_state *ictx = in;
	60	+
	61	+ sctx->count = ictx->count;
	62	+ memcpy(sctx->state, ictx->state, sizeof(ictx->state));
	63	+ memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
	64	+ sctx->func = KIMD_SHA_256;
	65	+ return 0;
	66	+}
	67	+
45	68	static struct shash_alg alg = {
46	69	.digestsize = SHA256_DIGEST_SIZE,
47	70	.init = sha256_init,
48	71	.update = s390_sha_update,
49	72	.final = s390_sha_final,
	73	+ .export = sha256_export,
	74	+ .import = sha256_import,
50	75	.descsize = sizeof(struct s390_sha_ctx),
	76	+ .statesize = sizeof(struct sha256_state),
51	77	.base = {
52	78	.cra_name = "sha256",
53	79	.cra_driver_name= "sha256-s390",