150 lines
3.6 KiB
C
150 lines
3.6 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 SHA38 Secure Hash Algorithm.
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*
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* Copyright IBM Corp. 2007
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* Author(s): Jan Glauber (jang@de.ibm.com)
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*/
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#include <crypto/internal/hash.h>
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#include <crypto/sha2.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/cpufeature.h>
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#include <asm/cpacf.h>
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#include "sha.h"
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static int sha512_init(struct shash_desc *desc)
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{
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struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
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*(__u64 *)&ctx->state[0] = SHA512_H0;
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*(__u64 *)&ctx->state[2] = SHA512_H1;
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*(__u64 *)&ctx->state[4] = SHA512_H2;
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*(__u64 *)&ctx->state[6] = SHA512_H3;
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*(__u64 *)&ctx->state[8] = SHA512_H4;
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*(__u64 *)&ctx->state[10] = SHA512_H5;
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*(__u64 *)&ctx->state[12] = SHA512_H6;
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*(__u64 *)&ctx->state[14] = SHA512_H7;
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ctx->count = 0;
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ctx->func = CPACF_KIMD_SHA_512;
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return 0;
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}
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static int sha512_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 sha512_state *octx = out;
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octx->count[0] = sctx->count;
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octx->count[1] = 0;
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memcpy(octx->state, sctx->state, sizeof(octx->state));
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memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
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return 0;
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}
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static int sha512_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 sha512_state *ictx = in;
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if (unlikely(ictx->count[1]))
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return -ERANGE;
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sctx->count = ictx->count[0];
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memcpy(sctx->state, ictx->state, sizeof(ictx->state));
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memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
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sctx->func = CPACF_KIMD_SHA_512;
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return 0;
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}
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static struct shash_alg sha512_alg = {
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.digestsize = SHA512_DIGEST_SIZE,
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.init = sha512_init,
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.update = s390_sha_update,
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.final = s390_sha_final,
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.export = sha512_export,
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.import = sha512_import,
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.descsize = sizeof(struct s390_sha_ctx),
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.statesize = sizeof(struct sha512_state),
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.base = {
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.cra_name = "sha512",
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.cra_driver_name= "sha512-s390",
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.cra_priority = 300,
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.cra_blocksize = SHA512_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("sha512");
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static int sha384_init(struct shash_desc *desc)
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{
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struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
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*(__u64 *)&ctx->state[0] = SHA384_H0;
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*(__u64 *)&ctx->state[2] = SHA384_H1;
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*(__u64 *)&ctx->state[4] = SHA384_H2;
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*(__u64 *)&ctx->state[6] = SHA384_H3;
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*(__u64 *)&ctx->state[8] = SHA384_H4;
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*(__u64 *)&ctx->state[10] = SHA384_H5;
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*(__u64 *)&ctx->state[12] = SHA384_H6;
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*(__u64 *)&ctx->state[14] = SHA384_H7;
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ctx->count = 0;
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ctx->func = CPACF_KIMD_SHA_512;
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return 0;
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}
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static struct shash_alg sha384_alg = {
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.digestsize = SHA384_DIGEST_SIZE,
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.init = sha384_init,
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.update = s390_sha_update,
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.final = s390_sha_final,
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.export = sha512_export,
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.import = sha512_import,
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.descsize = sizeof(struct s390_sha_ctx),
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.statesize = sizeof(struct sha512_state),
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.base = {
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.cra_name = "sha384",
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.cra_driver_name= "sha384-s390",
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.cra_priority = 300,
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.cra_blocksize = SHA384_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("sha384");
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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_SHA_512))
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return -ENODEV;
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if ((ret = crypto_register_shash(&sha512_alg)) < 0)
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goto out;
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if ((ret = crypto_register_shash(&sha384_alg)) < 0)
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crypto_unregister_shash(&sha512_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(&sha512_alg);
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crypto_unregister_shash(&sha384_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("SHA512 and SHA-384 Secure Hash Algorithm");
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