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146 lines
3.5 KiB
146 lines
3.5 KiB
// 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 SHA256 and SHA224 Secure Hash Algorithm. |
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* |
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* s390 Version: |
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* Copyright IBM Corp. 2019 |
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* Author(s): Joerg Schmidbauer ([email protected]) |
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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_256_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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memset(sctx->state, 0, sizeof(sctx->state)); |
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sctx->count = 0; |
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sctx->func = CPACF_KIMD_SHA3_256; |
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return 0; |
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} |
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static int sha3_256_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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memcpy(octx->st, sctx->state, sizeof(octx->st)); |
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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 sha3_256_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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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->func = CPACF_KIMD_SHA3_256; |
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return 0; |
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} |
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static int sha3_224_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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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->func = CPACF_KIMD_SHA3_224; |
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return 0; |
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} |
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static struct shash_alg sha3_256_alg = { |
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.digestsize = SHA3_256_DIGEST_SIZE, /* = 32 */ |
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.init = sha3_256_init, |
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.update = s390_sha_update, |
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.final = s390_sha_final, |
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.export = sha3_256_export, |
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.import = sha3_256_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 = "sha3-256", |
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.cra_driver_name = "sha3-256-s390", |
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.cra_priority = 300, |
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.cra_blocksize = SHA3_256_BLOCK_SIZE, |
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.cra_module = THIS_MODULE, |
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} |
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}; |
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static int sha3_224_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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memset(sctx->state, 0, sizeof(sctx->state)); |
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sctx->count = 0; |
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sctx->func = CPACF_KIMD_SHA3_224; |
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return 0; |
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} |
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static struct shash_alg sha3_224_alg = { |
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.digestsize = SHA3_224_DIGEST_SIZE, |
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.init = sha3_224_init, |
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.update = s390_sha_update, |
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.final = s390_sha_final, |
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.export = sha3_256_export, /* same as for 256 */ |
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.import = sha3_224_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 = "sha3-224", |
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.cra_driver_name = "sha3-224-s390", |
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.cra_priority = 300, |
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.cra_blocksize = SHA3_224_BLOCK_SIZE, |
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.cra_module = THIS_MODULE, |
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} |
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}; |
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static int __init sha3_256_s390_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_256)) |
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return -ENODEV; |
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ret = crypto_register_shash(&sha3_256_alg); |
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if (ret < 0) |
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goto out; |
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ret = crypto_register_shash(&sha3_224_alg); |
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if (ret < 0) |
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crypto_unregister_shash(&sha3_256_alg); |
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out: |
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return ret; |
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} |
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static void __exit sha3_256_s390_fini(void) |
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{ |
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crypto_unregister_shash(&sha3_224_alg); |
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crypto_unregister_shash(&sha3_256_alg); |
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} |
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module_cpu_feature_match(MSA, sha3_256_s390_init); |
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module_exit(sha3_256_s390_fini); |
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MODULE_ALIAS_CRYPTO("sha3-256"); |
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MODULE_ALIAS_CRYPTO("sha3-224"); |
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MODULE_LICENSE("GPL"); |
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MODULE_DESCRIPTION("SHA3-256 and SHA3-224 Secure Hash Algorithm");
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