| 1 | |
| 2 | |
| 3 | * SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and
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| 4 | * described at https://tools.ietf.org/html/draft-shen-sm3-hash-01
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| 5 | *
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| 6 | * Copyright (C) 2017 ARM Limited or its affiliates.
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| 7 | * Written by Gilad Ben-Yossef <[email protected]>
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| 8 | * Copyright (C) 2021 Tianjia Zhang <[email protected]>
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| 9 | * Copyright 2026 Google LLC
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| 10 |
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| 11 |
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| 12 | #include <crypto/internal/hash.h>
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| 13 | #include <crypto/sm3.h>
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| 14 | #include <linux/kernel.h>
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| 15 | #include <linux/module.h>
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| 16 |
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| 17 | #define SM3_CTX(desc) ((struct sm3_ctx *)shash_desc_ctx(desc))
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| 18 |
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| 19 | static int crypto_sm3_init(struct shash_desc *desc)
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| 20 | {
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| 21 | sm3_init(SM3_CTX(desc));
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| 22 | return 0;
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| 23 | }
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| 24 |
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| 25 | static int crypto_sm3_update(struct shash_desc *desc,
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| 26 | const u8 *data, unsigned int len)
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| 27 | {
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| 28 | sm3_update(SM3_CTX(desc), data, len);
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| 29 | return 0;
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| 30 | }
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| 31 |
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| 32 | static int crypto_sm3_final(struct shash_desc *desc, u8 *out)
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| 33 | {
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| 34 | sm3_final(SM3_CTX(desc), out);
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| 35 | return 0;
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| 36 | }
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| 37 |
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| 38 | static int crypto_sm3_digest(struct shash_desc *desc,
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| 39 | const u8 *data, unsigned int len, u8 *out)
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| 40 | {
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| 41 | sm3(data, len, out);
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| 42 | return 0;
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| 43 | }
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| 44 |
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| 45 | static int crypto_sm3_export_core(struct shash_desc *desc, void *out)
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| 46 | {
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| 47 | memcpy(out, SM3_CTX(desc), sizeof(struct sm3_ctx));
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| 48 | return 0;
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| 49 | }
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| 50 |
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| 51 | static int crypto_sm3_import_core(struct shash_desc *desc, const void *in)
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| 52 | {
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| 53 | memcpy(SM3_CTX(desc), in, sizeof(struct sm3_ctx));
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| 54 | return 0;
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| 55 | }
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| 56 |
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| 57 | static struct shash_alg sm3_alg = {
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| 58 | .base.cra_name = "sm3",
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| 59 | .base.cra_driver_name = "sm3-lib",
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| 60 | .base.cra_priority = 300,
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| 61 | .base.cra_blocksize = SM3_BLOCK_SIZE,
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| 62 | .base.cra_module = THIS_MODULE,
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| 63 | .digestsize = SM3_DIGEST_SIZE,
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| 64 | .init = crypto_sm3_init,
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| 65 | .update = crypto_sm3_update,
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| 66 | .final = crypto_sm3_final,
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| 67 | .digest = crypto_sm3_digest,
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| 68 | .export_core = crypto_sm3_export_core,
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| 69 | .import_core = crypto_sm3_import_core,
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| 70 | .descsize = sizeof(struct sm3_ctx),
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| 71 | };
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| 72 |
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| 73 | static int __init crypto_sm3_mod_init(void)
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| 74 | {
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| 75 | return crypto_register_shash(&sm3_alg);
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| 76 | }
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| 77 | module_init(crypto_sm3_mod_init);
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| 78 |
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| 79 | static void __exit crypto_sm3_mod_exit(void)
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| 80 | {
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| 81 | crypto_unregister_shash(&sm3_alg);
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| 82 | }
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| 83 | module_exit(crypto_sm3_mod_exit);
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| 84 |
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| 85 | MODULE_LICENSE("GPL v2");
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| 86 | MODULE_DESCRIPTION("Crypto API support for SM3");
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| 87 |
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| 88 | MODULE_ALIAS_CRYPTO("sm3");
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| 89 | MODULE_ALIAS_CRYPTO("sm3-lib");
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