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// SPDX-License-Identifier: GPL-2.0+
/*
* Cryptographic API.
*
* s390 implementation of the SHA512 and SHA384 Secure Hash Algorithm.
*
* Copyright IBM Corp. 2019
* Author(s): Joerg Schmidbauer (jschmidb@de.ibm.com)
*/
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/cpufeature.h>
#include <crypto/sha3.h>
#include <asm/cpacf.h>
#include "sha.h"
static int sha3_512_init(struct shash_desc *desc)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
if (!test_facility(86)) /* msa 12 */
memset(sctx->state, 0, sizeof(sctx->state));
sctx->count = 0;
sctx->func = CPACF_KIMD_SHA3_512;
sctx->first_message_part = 1;
return 0;
}
static int sha3_512_export(struct shash_desc *desc, void *out)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
struct sha3_state *octx = out;
octx->rsiz = sctx->count;
octx->rsizw = sctx->count >> 32;
memcpy(octx->st, sctx->state, sizeof(octx->st));
memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
octx->partial = sctx->first_message_part;
return 0;
}
static int sha3_512_import(struct shash_desc *desc, const void *in)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
const struct sha3_state *ictx = in;
if (unlikely(ictx->rsizw))
return -ERANGE;
sctx->count = ictx->rsiz;
memcpy(sctx->state, ictx->st, sizeof(ictx->st));
memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
sctx->first_message_part = ictx->partial;
sctx->func = CPACF_KIMD_SHA3_512;
return 0;
}
static int sha3_384_import(struct shash_desc *desc, const void *in)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
const struct sha3_state *ictx = in;
if (unlikely(ictx->rsizw))
return -ERANGE;
sctx->count = ictx->rsiz;
memcpy(sctx->state, ictx->st, sizeof(ictx->st));
memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
sctx->first_message_part = ictx->partial;
sctx->func = CPACF_KIMD_SHA3_384;
return 0;
}
static struct shash_alg sha3_512_alg = {
.digestsize = SHA3_512_DIGEST_SIZE,
.init = sha3_512_init,
.update = s390_sha_update,
.final = s390_sha_final,
.export = sha3_512_export,
.import = sha3_512_import,
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha3_state),
.base = {
.cra_name = "sha3-512",
.cra_driver_name = "sha3-512-s390",
.cra_priority = 300,
.cra_blocksize = SHA3_512_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
MODULE_ALIAS_CRYPTO("sha3-512");
static int sha3_384_init(struct shash_desc *desc)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
if (!test_facility(86)) /* msa 12 */
memset(sctx->state, 0, sizeof(sctx->state));
sctx->count = 0;
sctx->func = CPACF_KIMD_SHA3_384;
sctx->first_message_part = 1;
return 0;
}
static struct shash_alg sha3_384_alg = {
.digestsize = SHA3_384_DIGEST_SIZE,
.init = sha3_384_init,
.update = s390_sha_update,
.final = s390_sha_final,
.export = sha3_512_export, /* same as for 512 */
.import = sha3_384_import, /* function code different! */
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha3_state),
.base = {
.cra_name = "sha3-384",
.cra_driver_name = "sha3-384-s390",
.cra_priority = 300,
.cra_blocksize = SHA3_384_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_sha_ctx),
.cra_module = THIS_MODULE,
}
};
MODULE_ALIAS_CRYPTO("sha3-384");
static int __init init(void)
{
int ret;
if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA3_512))
return -ENODEV;
ret = crypto_register_shash(&sha3_512_alg);
if (ret < 0)
goto out;
ret = crypto_register_shash(&sha3_384_alg);
if (ret < 0)
crypto_unregister_shash(&sha3_512_alg);
out:
return ret;
}
static void __exit fini(void)
{
crypto_unregister_shash(&sha3_512_alg);
crypto_unregister_shash(&sha3_384_alg);
}
module_cpu_feature_match(S390_CPU_FEATURE_MSA, init);
module_exit(fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA3-512 and SHA3-384 Secure Hash Algorithm");
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