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