1 files changed, 87 insertions, 0 deletions
diff --git a/crypto/sm3_generic.c b/crypto/sm3_generic.c
new file mode 100644
index 000000000..a215c1c37
--- /dev/null
+++ b/crypto/sm3_generic.c
@@ -0,0 +1,87 @@
+// 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");