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