Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 9fadfd1a authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: sha512-s390 - Add export/import support 


    
This patch adds export/import support to sha512-s390 (which includes
sha384-s390).  The exported type is defined by struct sha512_state,
which is basically the entire descriptor state of sha512_generic.

Since sha512-s390 only supports a 64-bit byte count the import
function will reject anything that exceeds that.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 13887ed6

arch/s390/crypto/sha512_s390.c

+36 −0
Original line number Diff line number Diff line
@@ -13,7 +13,10 @@ 
 *

 */

#include <crypto/internal/hash.h>

#include <crypto/sha.h>

#include <linux/errno.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/module.h>



#include "sha.h"
@@ -37,12 +40,42 @@ static int sha512_init(struct shash_desc *desc) 
	return 0;

}



static int sha512_export(struct shash_desc *desc, void *out)

{

	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);

	struct sha512_state *octx = out;



	octx->count[0] = sctx->count;

	octx->count[1] = 0;

	memcpy(octx->state, sctx->state, sizeof(octx->state));

	memcpy(octx->buf, sctx->buf, sizeof(octx->buf));

	return 0;

}



static int sha512_import(struct shash_desc *desc, const u8 *in)

{

	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);

	struct sha512_state *ictx = in;



	if (unlikely(ictx->count[1]))

		return -ERANGE;

	sctx->count = ictx->count[0];



	memcpy(sctx->state, ictx->state, sizeof(ictx->state));

	memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));

	sctx->func = KIMD_SHA_512;

	return 0;

}



static struct shash_alg sha512_alg = {

	.digestsize	=	SHA512_DIGEST_SIZE,

	.init		=	sha512_init,

	.update		=	s390_sha_update,

	.final		=	s390_sha_final,

	.export		=	sha512_export,

	.import		=	sha512_import,

	.descsize	=	sizeof(struct s390_sha_ctx),

	.statesize	=	sizeof(struct sha512_state),

	.base		=	{

		.cra_name	=	"sha512",

		.cra_driver_name=	"sha512-s390",
@@ -78,7 +111,10 @@ static struct shash_alg sha384_alg = { 
	.init		=	sha384_init,

	.update		=	s390_sha_update,

	.final		=	s390_sha_final,

	.export		=	sha512_export,

	.import		=	sha512_import,

	.descsize	=	sizeof(struct s390_sha_ctx),

	.statesize	=	sizeof(struct sha512_state),

	.base		=	{

		.cra_name	=	"sha384",

		.cra_driver_name=	"sha384-s390",