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-rw-r--r--include/crypto/sm4.h25
1 files changed, 19 insertions, 6 deletions
diff --git a/include/crypto/sm4.h b/include/crypto/sm4.h
index 7afd730d16ff..709f286e7b25 100644
--- a/include/crypto/sm4.h
+++ b/include/crypto/sm4.h
@@ -3,6 +3,7 @@
/*
* Common values for the SM4 algorithm
* Copyright (C) 2018 ARM Limited or its affiliates.
+ * Copyright (c) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
*/
#ifndef _CRYPTO_SM4_H
@@ -15,17 +16,29 @@
#define SM4_BLOCK_SIZE 16
#define SM4_RKEY_WORDS 32
-struct crypto_sm4_ctx {
+struct sm4_ctx {
u32 rkey_enc[SM4_RKEY_WORDS];
u32 rkey_dec[SM4_RKEY_WORDS];
};
-int crypto_sm4_set_key(struct crypto_tfm *tfm, const u8 *in_key,
- unsigned int key_len);
-int crypto_sm4_expand_key(struct crypto_sm4_ctx *ctx, const u8 *in_key,
+/**
+ * sm4_expandkey - Expands the SM4 key as described in GB/T 32907-2016
+ * @ctx: The location where the computed key will be stored.
+ * @in_key: The supplied key.
+ * @key_len: The length of the supplied key.
+ *
+ * Returns 0 on success. The function fails only if an invalid key size (or
+ * pointer) is supplied.
+ */
+int sm4_expandkey(struct sm4_ctx *ctx, const u8 *in_key,
unsigned int key_len);
-void crypto_sm4_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in);
-void crypto_sm4_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in);
+/**
+ * sm4_crypt_block - Encrypt or decrypt a single SM4 block
+ * @rk: The rkey_enc for encrypt or rkey_dec for decrypt
+ * @out: Buffer to store output data
+ * @in: Buffer containing the input data
+ */
+void sm4_crypt_block(const u32 *rk, u8 *out, const u8 *in);
#endif