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-rw-r--r--crypto/sm3_generic.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/crypto/sm3_generic.c b/crypto/sm3_generic.c
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+++ b/crypto/sm3_generic.c
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+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and
+ * described at https://tools.ietf.org/html/draft-shen-sm3-hash-01
+ *
+ * Copyright (C) 2017 ARM Limited or its affiliates.
+ * Written by Gilad Ben-Yossef <gilad@benyossef.com>
+ * Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
+ */
+
+#include <crypto/internal/hash.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/types.h>
+#include <crypto/sm3.h>
+#include <crypto/sm3_base.h>
+#include <linux/bitops.h>
+#include <asm/byteorder.h>
+#include <asm/unaligned.h>
+
+const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {
+ 0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F,
+ 0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F,
+ 0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74,
+ 0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B
+};
+EXPORT_SYMBOL_GPL(sm3_zero_message_hash);
+
+static int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ sm3_update(shash_desc_ctx(desc), data, len);
+ return 0;
+}
+
+static int crypto_sm3_final(struct shash_desc *desc, u8 *out)
+{
+ sm3_final(shash_desc_ctx(desc), out);
+ return 0;
+}
+
+static int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
+ unsigned int len, u8 *hash)
+{
+ struct sm3_state *sctx = shash_desc_ctx(desc);
+
+ if (len)
+ sm3_update(sctx, data, len);
+ sm3_final(sctx, hash);
+ return 0;
+}
+
+static struct shash_alg sm3_alg = {
+ .digestsize = SM3_DIGEST_SIZE,
+ .init = sm3_base_init,
+ .update = crypto_sm3_update,
+ .final = crypto_sm3_final,
+ .finup = crypto_sm3_finup,
+ .descsize = sizeof(struct sm3_state),
+ .base = {
+ .cra_name = "sm3",
+ .cra_driver_name = "sm3-generic",
+ .cra_priority = 100,
+ .cra_blocksize = SM3_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+static int __init sm3_generic_mod_init(void)
+{
+ return crypto_register_shash(&sm3_alg);
+}
+
+static void __exit sm3_generic_mod_fini(void)
+{
+ crypto_unregister_shash(&sm3_alg);
+}
+
+subsys_initcall(sm3_generic_mod_init);
+module_exit(sm3_generic_mod_fini);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");
+
+MODULE_ALIAS_CRYPTO("sm3");
+MODULE_ALIAS_CRYPTO("sm3-generic");