Atlas - SDL_test_md5.h
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1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21
22/**
23 *  MD5 related functions of SDL test framework.
24 *
25 *  This code is a part of the SDL test library, not the main SDL library.
26 */
27
28/*
29 ***********************************************************************
30 ** Header file for implementation of MD5                             **
31 ** RSA Data Security, Inc. MD5 Message-Digest Algorithm              **
32 ** Created: 2/17/90 RLR                                              **
33 ** Revised: 12/27/90 SRD,AJ,BSK,JT Reference C version               **
34 ** Revised (for MD5): RLR 4/27/91                                    **
35 **   -- G modified to have y&~z instead of y&z                       **
36 **   -- FF, GG, HH modified to add in last register done             **
37 **   -- Access pattern: round 2 works mod 5, round 3 works mod 3     **
38 **   -- distinct additive constant for each step                     **
39 **   -- round 4 added, working mod 7                                 **
40 ***********************************************************************
41*/
42
43/*
44 ***********************************************************************
45 **  Message-digest routines:                                         **
46 **  To form the message digest for a message M                       **
47 **    (1) Initialize a context buffer mdContext using MD5Init        **
48 **    (2) Call MD5Update on mdContext and M                          **
49 **    (3) Call MD5Final on mdContext                                 **
50 **  The message digest is now in mdContext->digest[0...15]           **
51 ***********************************************************************
52*/
53
54#ifndef SDL_test_md5_h_
55#define SDL_test_md5_h_
56
57#include <SDL3/SDL_stdinc.h>
58
59#include <SDL3/SDL_begin_code.h>
60/* Set up for C function definitions, even when using C++ */
61#ifdef __cplusplus
62extern "C" {
63#endif
64
65/* ------------ Definitions --------- */
66
67/* typedef a 32-bit type */
68typedef Uint32 MD5UINT4;
69
70/* Data structure for MD5 (Message-Digest) computation */
71typedef struct SDLTest_Md5Context {
72    MD5UINT4 i[2];              /* number of _bits_ handled mod 2^64 */
73    MD5UINT4 buf[4];            /* scratch buffer */
74    unsigned char in[64];       /* input buffer */
75    unsigned char digest[16];   /* actual digest after Md5Final call */
76} SDLTest_Md5Context;
77
78/* ---------- Function Prototypes ------------- */
79
80/**
81 * initialize the context
82 *
83 * \param  mdContext        pointer to context variable
84 *
85 * Note: The function initializes the message-digest context
86 *       mdContext. Call before each new use of the context -
87 *       all fields are set to zero.
88 */
89void SDLCALL SDLTest_Md5Init(SDLTest_Md5Context *mdContext);
90
91/**
92 * update digest from variable length data
93 *
94 * \param  mdContext       pointer to context variable
95 * \param  inBuf           pointer to data array/string
96 * \param  inLen           length of data array/string
97 *
98 * Note: The function updates the message-digest context to account
99 *       for the presence of each of the characters inBuf[0..inLen-1]
100 *       in the message whose digest is being computed.
101 */
102void SDLCALL SDLTest_Md5Update(SDLTest_Md5Context *mdContext, unsigned char *inBuf,
103                 unsigned int inLen);
104
105/**
106 * complete digest computation
107 *
108 * \param mdContext     pointer to context variable
109 *
110 * Note: The function terminates the message-digest computation and
111 *       ends with the desired message digest in mdContext.digest[0..15].
112 *       Always call before using the digest[] variable.
113 */
114void SDLCALL SDLTest_Md5Final(SDLTest_Md5Context *mdContext);
115
116/* Ends C function definitions when using C++ */
117#ifdef __cplusplus
118}
119#endif
120#include <SDL3/SDL_close_code.h>
121
122#endif /* SDL_test_md5_h_ */
123
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