Wim van der Vegt / MD5

port of a small MD5 library (see http://www.zedwood.com/article/121/cpp-md5-function ). I have removed the stream functionality (saves about 10k flash and 8k RAM) Compatible with the latest mBed libs (only renamed a file).

Fork of MD5 by Hendrik Lipka

md5.h@1:02f58b9bbd44, 2016-11-14 (annotated)

Committer:
wvd_vegt
Date:
Mon Nov 14 11:27:24 2016 +0000
Revision:
1:02f58b9bbd44
Parent:
0:8561cc01127c 
Changed the .c extension to .cpp to prevent cryptic compilation errors when using the latest mBed libs (129).

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hlipka 0:8561cc01127c 1 /* MD5
hlipka 0:8561cc01127c 2 converted to C++ class by Frank Thilo (thilo@unix-ag.org)
hlipka 0:8561cc01127c 3 for bzflag (http://www.bzflag.org)
hlipka 0:8561cc01127c 4
hlipka 0:8561cc01127c 5 based on:
hlipka 0:8561cc01127c 6
hlipka 0:8561cc01127c 7 md5.h and md5.c
hlipka 0:8561cc01127c 8 reference implementation of RFC 1321
hlipka 0:8561cc01127c 9
hlipka 0:8561cc01127c 10 Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
hlipka 0:8561cc01127c 11 rights reserved.
hlipka 0:8561cc01127c 12
hlipka 0:8561cc01127c 13 License to copy and use this software is granted provided that it
hlipka 0:8561cc01127c 14 is identified as the "RSA Data Security, Inc. MD5 Message-Digest
hlipka 0:8561cc01127c 15 Algorithm" in all material mentioning or referencing this software
hlipka 0:8561cc01127c 16 or this function.
hlipka 0:8561cc01127c 17
hlipka 0:8561cc01127c 18 License is also granted to make and use derivative works provided
hlipka 0:8561cc01127c 19 that such works are identified as "derived from the RSA Data
hlipka 0:8561cc01127c 20 Security, Inc. MD5 Message-Digest Algorithm" in all material
hlipka 0:8561cc01127c 21 mentioning or referencing the derived work.
hlipka 0:8561cc01127c 22
hlipka 0:8561cc01127c 23 RSA Data Security, Inc. makes no representations concerning either
hlipka 0:8561cc01127c 24 the merchantability of this software or the suitability of this
hlipka 0:8561cc01127c 25 software for any particular purpose. It is provided "as is"
hlipka 0:8561cc01127c 26 without express or implied warranty of any kind.
hlipka 0:8561cc01127c 27
hlipka 0:8561cc01127c 28 These notices must be retained in any copies of any part of this
hlipka 0:8561cc01127c 29 documentation and/or software.
hlipka 0:8561cc01127c 30
hlipka 0:8561cc01127c 31 */
hlipka 0:8561cc01127c 32
hlipka 0:8561cc01127c 33 #ifndef BZF_MD5_H
hlipka 0:8561cc01127c 34 #define BZF_MD5_H
hlipka 0:8561cc01127c 35
hlipka 0:8561cc01127c 36 #include <string>
hlipka 0:8561cc01127c 37
hlipka 0:8561cc01127c 38
hlipka 0:8561cc01127c 39 /** a small class for calculating MD5 hashes of strings or byte arrays
hlipka 0:8561cc01127c 40 it is not meant to be fast or secure
hlipka 0:8561cc01127c 41
hlipka 0:8561cc01127c 42 usage: 1) feed it blocks of uchars with update()
hlipka 0:8561cc01127c 43 2) finalize()
hlipka 0:8561cc01127c 44 3) get hexdigest() string
hlipka 0:8561cc01127c 45 or
hlipka 0:8561cc01127c 46 MD5(std::string).hexdigest()
hlipka 0:8561cc01127c 47
hlipka 0:8561cc01127c 48 assumes that char is 8 bit and int is 32 bit
hlipka 0:8561cc01127c 49 */
hlipka 0:8561cc01127c 50 class MD5
hlipka 0:8561cc01127c 51 {
hlipka 0:8561cc01127c 52 public:
hlipka 0:8561cc01127c 53 typedef unsigned int size_type; // must be 32bit
hlipka 0:8561cc01127c 54
hlipka 0:8561cc01127c 55 MD5();
hlipka 0:8561cc01127c 56 /**
hlipka 0:8561cc01127c 57 take string, hash it and finalize
hlipka 0:8561cc01127c 58 @param text the string to hash
hlipka 0:8561cc01127c 59 */
hlipka 0:8561cc01127c 60 MD5(const std::string& text);
hlipka 0:8561cc01127c 61 /**
hlipka 0:8561cc01127c 62 add text to hash
hlipka 0:8561cc01127c 63 @param buf the text to add to the hash
hlipka 0:8561cc01127c 64 @param text length
hlipka 0:8561cc01127c 65 */
hlipka 0:8561cc01127c 66 void update(const unsigned char *buf, size_type length);
hlipka 0:8561cc01127c 67 /**
hlipka 0:8561cc01127c 68 add text to hash
hlipka 0:8561cc01127c 69 @param buf the text to add to the hash
hlipka 0:8561cc01127c 70 @param text length
hlipka 0:8561cc01127c 71 */
hlipka 0:8561cc01127c 72 void update(const char *buf, size_type length);
hlipka 0:8561cc01127c 73 /**
hlipka 0:8561cc01127c 74 calculate the final hash value
hlipka 0:8561cc01127c 75 */
hlipka 0:8561cc01127c 76 MD5& finalize();
hlipka 0:8561cc01127c 77 /**
hlipka 0:8561cc01127c 78 @return the hash as hex string
hlipka 0:8561cc01127c 79 */
hlipka 0:8561cc01127c 80 std::string hexdigest() const;
hlipka 0:8561cc01127c 81
hlipka 0:8561cc01127c 82 private:
hlipka 0:8561cc01127c 83 void init();
hlipka 0:8561cc01127c 84 typedef unsigned char uint1; // 8bit
hlipka 0:8561cc01127c 85 typedef unsigned int uint4; // 32bit
hlipka 0:8561cc01127c 86 enum {blocksize = 64}; // VC6 won't eat a const static int here
hlipka 0:8561cc01127c 87
hlipka 0:8561cc01127c 88 void transform(const uint1 block[blocksize]);
hlipka 0:8561cc01127c 89 static void decode(uint4 output[], const uint1 input[], size_type len);
hlipka 0:8561cc01127c 90 static void encode(uint1 output[], const uint4 input[], size_type len);
hlipka 0:8561cc01127c 91
hlipka 0:8561cc01127c 92 bool finalized;
hlipka 0:8561cc01127c 93 uint1 buffer[blocksize]; // bytes that didn't fit in last 64 byte chunk
hlipka 0:8561cc01127c 94 uint4 count[2]; // 64bit counter for number of bits (lo, hi)
hlipka 0:8561cc01127c 95 uint4 state[4]; // digest so far
hlipka 0:8561cc01127c 96 uint1 digest[16]; // the result
hlipka 0:8561cc01127c 97
hlipka 0:8561cc01127c 98 // low level logic operations
hlipka 0:8561cc01127c 99 static inline uint4 F(uint4 x, uint4 y, uint4 z);
hlipka 0:8561cc01127c 100 static inline uint4 G(uint4 x, uint4 y, uint4 z);
hlipka 0:8561cc01127c 101 static inline uint4 H(uint4 x, uint4 y, uint4 z);
hlipka 0:8561cc01127c 102 static inline uint4 I(uint4 x, uint4 y, uint4 z);
hlipka 0:8561cc01127c 103 static inline uint4 rotate_left(uint4 x, int n);
hlipka 0:8561cc01127c 104 static inline void FF(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac);
hlipka 0:8561cc01127c 105 static inline void GG(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac);
hlipka 0:8561cc01127c 106 static inline void HH(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac);
hlipka 0:8561cc01127c 107 static inline void II(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac);
hlipka 0:8561cc01127c 108 };
hlipka 0:8561cc01127c 109
hlipka 0:8561cc01127c 110 std::string md5(const std::string str);
hlipka 0:8561cc01127c 111
hlipka 0:8561cc01127c 112 #endif