add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/crypto/sm4_generic.c
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@@ -143,29 +143,23 @@
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 EXPORT_SYMBOL_GPL(crypto_sm4_expand_key);
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 /**
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- * crypto_sm4_set_key - Set the AES key.
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+ * crypto_sm4_set_key - Set the SM4 key.
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  * @tfm:	The %crypto_tfm that is used in the context.
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  * @in_key:	The input key.
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  * @key_len:	The size of the key.
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  *
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- * Returns 0 on success, on failure the %CRYPTO_TFM_RES_BAD_KEY_LEN flag in tfm
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- * is set. The function uses crypto_sm4_expand_key() to expand the key.
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+ * This function uses crypto_sm4_expand_key() to expand the key.
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  * &crypto_sm4_ctx _must_ be the private data embedded in @tfm which is
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  * retrieved with crypto_tfm_ctx().
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+ *
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+ * Return: 0 on success; -EINVAL on failure (only happens for bad key lengths)
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  */
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 int crypto_sm4_set_key(struct crypto_tfm *tfm, const u8 *in_key,
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 		       unsigned int key_len)
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 {
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 	struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm);
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-	u32 *flags = &tfm->crt_flags;
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-	int ret;
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-	ret = crypto_sm4_expand_key(ctx, in_key, key_len);
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-	if (!ret)
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-		return 0;
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-
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-	*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
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-	return -EINVAL;
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+	return crypto_sm4_expand_key(ctx, in_key, key_len);
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 }
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 EXPORT_SYMBOL_GPL(crypto_sm4_set_key);
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@@ -237,7 +231,7 @@
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 	crypto_unregister_alg(&sm4_alg);
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 }
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-module_init(sm4_init);
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+subsys_initcall(sm4_init);
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 module_exit(sm4_fini);
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 MODULE_DESCRIPTION("SM4 Cipher Algorithm");