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https://github.com/espressif/ESP8266_RTOS_SDK.git
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72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <stdint.h>
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief ARC4 context structure
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*/
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typedef struct
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{
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int x; /*!< permutation index */
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int y; /*!< permutation index */
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unsigned char m[256]; /*!< permutation table */
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}esp_arc4_context;
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/**
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* @brief ARC4 key schedule
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*
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* @param ctx ARC4 context to be setup
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* @param key the secret key
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* @param keylen length of the key, in bytes
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*/
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void esp_arc4_setup(esp_arc4_context *ctx, const uint8_t *key, uint32_t keylen);
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/**
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* @brief ARC4 cipher function
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*
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* @param ctx ARC4 context
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* @param length length of the input data
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* @param input buffer holding the input data
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* @param output buffer for the output data
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*
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* @return 0 if successful
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*/
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int esp_arc4_encrypt(esp_arc4_context *ctx, size_t length, const uint8_t *input, uint8_t *output);
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/**
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* @brief ARC4 cipher function
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*
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* @param ctx ARC4 context
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* @param length length of the input data
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* @param input buffer holding the input data
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* @param output buffer for the output data
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*
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* @return 0 if successful
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* @Note When you encrypt or decrypt, must call esp_arc4_setup function to set key.
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* Encrypt and decrypt will change the ctx value
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*/
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int esp_arc4_decrypt(esp_arc4_context *ctx, size_t length, const uint8_t *input, uint8_t *output );
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#ifdef __cplusplus
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}
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#endif
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