1//
2// MD5 message-digest algorithm
3// Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All rights reserved.
4//
5// C++/object oriented translation and modification:
6// Copyright (C) 1995 Mordechai T. Abzug
7//
8// Further adaptations for SuperTux:
9// Copyright (C) 2008 Christoph Sommer <christoph.sommer@2008.expires.deltadevelopment.de>
10//
11// This translation/modification is provided "as is," without express or
12// implied warranty of any kind.
13//
14// The translators/modifiers do not claim:
15// (1) that MD5 will do what you think it does;
16// (2) that this translation/ modification is accurate; or
17// (3) that this software is "merchantible."
18//
19// based on:
20//
21// MD5.H - header file for MD5C.C
22// MDDRIVER.C - test driver for MD2, MD4 and MD5
23// Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All rights reserved.
24//
25// License to copy and use this software is granted provided that it
26// is identified as the "RSA Data Security, Inc. MD5 Message-Digest
27// Algorithm" in all material mentioning or referencing this software
28// or this function.
29//
30// License is also granted to make and use derivative works provided
31// that such works are identified as "derived from the RSA Data
32// Security, Inc. MD5 Message-Digest Algorithm" in all material
33// mentioning or referencing the derived work.
34//
35// RSA Data Security, Inc. makes no representations concerning either
36// the merchantability of this software or the suitability of this
37// software for any particular purpose. It is provided "as is"
38// without express or implied warranty of any kind.
39//
40// These notices must be retained in any copies of any part of this
41// documentation and/or software.
42//
43
44#ifndef HEADER_SUPERTUX_ADDON_MD5_HPP
45#define HEADER_SUPERTUX_ADDON_MD5_HPP
46
47#include <fstream>
48#include <stdint.h>
49
50class MD5
51{
52public:
53 MD5();
54 MD5(uint8_t* string); /**< digest string, finalize */
55 MD5(std::istream& stream); /**< digest stream, finalize */
56 MD5(FILE *file); /**< digest file, close, finalize */
57 MD5(std::ifstream& stream); /**< digest stream, close, finalize */
58
59 void update(uint8_t* input, unsigned int input_length); /**< MD5 block update operation. Continues an MD5 message-digest operation, processing another message block, and updating the context. */
60 void update(std::istream& stream);
61 void update(FILE *file);
62 void update(std::ifstream& stream);
63
64 uint8_t* raw_digest(); /**< digest as a 16-byte binary array */
65 std::string hex_digest(); /**< digest as a 33-byte ascii-hex string */
66 friend std::ostream& operator<<(std::ostream&, MD5 context);
67
68private:
69 uint32_t state[4];
70 uint32_t count[2]; /**< number of _bits_, mod 2^64 */
71 uint8_t buffer[64]; /**< input buffer */
72 uint8_t digest[16];
73 bool finalized;
74
75 void init(); /**< called by all constructors */
76 void finalize(); /**< MD5 finalization. Ends an MD5 message-digest operation, writing the the message digest and zeroizing the context. */
77 void transform(uint8_t* buffer); /**< MD5 basic transformation. Transforms state based on block. Does the real update work. Note that length is implied to be 64. */
78
79 static void encode(uint8_t* dest, uint32_t* src, uint32_t length); /**< Encodes input (uint32_t) into output (uint8_t). Assumes len is a multiple of 4. */
80 static void decode(uint32_t* dest, uint8_t* src, uint32_t length); /**< Decodes input (uint8_t) into output (uint32_t). Assumes len is a multiple of 4. */
81 static void memcpy(uint8_t* dest, uint8_t* src, uint32_t length);
82 static void memset(uint8_t* start, uint8_t val, uint32_t length);
83
84 static inline uint32_t rotate_left(uint32_t x, uint32_t n);
85 static inline uint32_t F(uint32_t x, uint32_t y, uint32_t z); //*< F, G, H and I are basic MD5 functions. */
86 static inline uint32_t G(uint32_t x, uint32_t y, uint32_t z);
87 static inline uint32_t H(uint32_t x, uint32_t y, uint32_t z);
88 static inline uint32_t I(uint32_t x, uint32_t y, uint32_t z);
89 static inline void FF(uint32_t& a, uint32_t b, uint32_t c, uint32_t d, uint32_t x, uint32_t s, uint32_t ac); /**< FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4. Rotation is separate from addition to prevent recomputation. */
90 static inline void GG(uint32_t& a, uint32_t b, uint32_t c, uint32_t d, uint32_t x, uint32_t s, uint32_t ac);
91 static inline void HH(uint32_t& a, uint32_t b, uint32_t c, uint32_t d, uint32_t x, uint32_t s, uint32_t ac);
92 static inline void II(uint32_t& a, uint32_t b, uint32_t c, uint32_t d, uint32_t x, uint32_t s, uint32_t ac);
93
94};
95
96#endif
97
98/* EOF */
99