89 lines
3.9 KiB
C
89 lines
3.9 KiB
C
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/**
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********************************************************************
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* @file util_md5.h
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* @brief This is the header file for "util_md5.c", defining the structure and
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* (exported) function prototypes.
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*
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* @copyright (c) 2021 DJI. All rights reserved.
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*
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* All information contained herein is, and remains, the property of DJI.
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* The intellectual and technical concepts contained herein are proprietary
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* to DJI and may be covered by U.S. and foreign patents, patents in process,
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* and protected by trade secret or copyright law. Dissemination of this
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* information, including but not limited to data and other proprietary
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* material(s) incorporated within the information, in any form, is strictly
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* prohibited without the express written consent of DJI.
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*
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* If you receive this source code without DJI’s authorization, you may not
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* further disseminate the information, and you must immediately remove the
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* source code and notify DJI of its removal. DJI reserves the right to pursue
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* legal actions against you for any loss(es) or damage(s) caused by your
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* failure to do so.
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*
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* crypto-algorithms
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* =================
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*
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* About
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* ---
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* These are basic implementations of standard cryptography algorithms, written by Brad Conte (brad@bradconte.com) from
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* scratch and without any cross-licensing. They exist to provide publically accessible, restriction-free implementations
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* of popular cryptographic algorithms, like AES and SHA-1. These are primarily intended for educational and pragmatic
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* purposes (such as comparing a specification to actual implementation code, or for building an internal application
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* that computes test vectors for a product). The algorithms have been tested against standard test vectors.
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* This code is released into the public domain free of any restrictions. The author requests acknowledgement if the code
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* is used, but does not require it. This code is provided free of any liability and without any quality claims by the
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* author.
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* Note that these are *not* cryptographically secure implementations. They have no resistence to side-channel attacks
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* and should not be used in contexts that need cryptographically secure implementations.
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* These algorithms are not optimized for speed or space. They are primarily designed to be easy to read, although some
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* basic optimization techniques have been employed.
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* Building
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* ---
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* The source code for each algorithm will come in a pair of a source code file and a header file. There should be no
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* inter-header file dependencies, no additional libraries, no platform-specific header files, or any other complicating
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* matters. Compiling them should be as easy as adding the relevent source code to the project.
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*
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* @statement DJI has modified some symbols' name.
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*
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*********************************************************************
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*/
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/* Define to prevent recursive inclusion -------------------------------------*/
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#ifndef UTIL_MD5_H
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#define UTIL_MD5_H
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/* Includes ------------------------------------------------------------------*/
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Exported constants --------------------------------------------------------*/
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#define MD5_BLOCK_SIZE 16 // MD5 outputs a 16 byte digest
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/* Exported types ------------------------------------------------------------*/
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typedef unsigned char BYTE; // 8-bit byte
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typedef unsigned int WORD; // 32-bit word, change to "long" for 16-bit machines
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typedef struct {
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BYTE data[64];
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WORD datalen;
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unsigned long long bitlen;
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WORD state[4];
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} MD5_CTX;
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/* Exported functions --------------------------------------------------------*/
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void UtilMd5_Init(MD5_CTX *ctx);
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void UtilMd5_Update(MD5_CTX *ctx, const BYTE *data, size_t len);
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void UtilMd5_Final(MD5_CTX *ctx, BYTE *hash);
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#ifdef __cplusplus
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}
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#endif
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#endif // UTIL_MD5_H
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/************************ (C) COPYRIGHT DJI Innovations *******END OF FILE******/
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