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Commit f63559be authored by Herbert Xu's avatar Herbert Xu
Browse files

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: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 406f104b

arch/s390/crypto/sha256_s390.c

+26 −0
Original line number Diff line number Diff line
@@ -42,12 +42,38 @@ static int sha256_init(struct shash_desc *desc) 
	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",