1 // MD5.CPP - RSA Data Security, Inc., MD5 message-digest algorithm
4 Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
7 License to copy and use this software is granted provided that it
8 is identified as the "RSA Data Security, Inc. MD5 Message-Digest
9 Algorithm" in all material mentioning or referencing this software
12 License is also granted to make and use derivative works provided
13 that such works are identified as "derived from the RSA Data
14 Security, Inc. MD5 Message-Digest Algorithm" in all material
15 mentioning or referencing the derived work.
17 RSA Data Security, Inc. makes no representations concerning either
18 the merchantability of this software or the suitability of this
19 software for any particular purpose. It is provided "as is"
20 without express or implied warranty of any kind.
22 These notices must be retained in any copies of any part of this
23 documentation and/or software.
35 // Constants for MD5Transform routine.
53 static void MD5Transform ( UINT4
[4], const uchar
[64] );
54 static void Encode ( unsigned char *, UINT4
*, unsigned int );
55 static void Decode ( UINT4
*, const uchar
*, unsigned int );
57 static unsigned char PADDING
[64] =
59 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
60 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
61 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
62 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
65 // F, G, H and I are basic MD5 functions.
66 #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
67 #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
68 #define H(x, y, z) ((x) ^ (y) ^ (z))
69 #define I(x, y, z) ((y) ^ ((x) | (~z)))
71 // ROTATE_LEFT rotates x left n bits.
72 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
74 // FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
75 // Rotation is separate from addition to prevent recomputation.
76 #define FF(a, b, c, d, x, s, ac) { \
77 (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
78 (a) = ROTATE_LEFT ((a), (s)); \
81 #define GG(a, b, c, d, x, s, ac) { \
82 (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
83 (a) = ROTATE_LEFT ((a), (s)); \
86 #define HH(a, b, c, d, x, s, ac) { \
87 (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
88 (a) = ROTATE_LEFT ((a), (s)); \
91 #define II(a, b, c, d, x, s, ac) { \
92 (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
93 (a) = ROTATE_LEFT ((a), (s)); \
97 // MD5 initialization. Begins an MD5 operation, writing a new context.
99 MD5_CTX
*context
) // context
101 context
->count
[0] = context
->count
[1] = 0;
102 // Load magic initialization constants.
103 context
->state
[0] = 0x67452301;
104 context
->state
[1] = 0xefcdab89;
105 context
->state
[2] = 0x98badcfe;
106 context
->state
[3] = 0x10325476;
109 // MD5 block update operation. Continues an MD5 message-digest
110 // operation, processing another message block, and updating the
113 MD5_CTX
*context
, // context
114 const char *input_
, // input block
115 unsigned int inputLen
) // length of input block
117 unsigned int i
, index
, partLen
;
118 const uchar
* input
= (const uchar
*)input_
;
120 // Compute number of bytes mod 64
121 index
= (unsigned int)((context
->count
[0] >> 3) & 0x3F);
123 // Update number of bits
124 if ((context
->count
[0] += ((UINT4
)inputLen
<< 3))
125 < ((UINT4
)inputLen
<< 3))
127 context
->count
[1] += ((UINT4
)inputLen
>> 29);
129 partLen
= 64 - index
;
131 // Transform as many times as possible.
132 if (inputLen
>= partLen
)
135 ((POINTER
)&context
->buffer
[index
], (POINTER
)input
, partLen
);
136 MD5Transform (context
->state
, context
->buffer
);
138 for (i
= partLen
; i
+ 63 < inputLen
; i
+= 64)
139 MD5Transform (context
->state
, &input
[i
]);
146 // Buffer remaining input
148 ((POINTER
)&context
->buffer
[index
], (POINTER
)&input
[i
],
152 // MD5 finalization. Ends an MD5 message-digest operation, writing the
153 // the message digest and zeroizing the context.
155 unsigned char digest
[16], // message digest
156 MD5_CTX
*context
) // context
159 unsigned int index
, padLen
;
161 // Save number of bits
162 Encode (bits
, context
->count
, 8);
164 // Pad out to 56 mod 64.
165 index
= (unsigned int)((context
->count
[0] >> 3) & 0x3f);
166 padLen
= (index
< 56) ? (56 - index
) : (120 - index
);
167 MD5Update (context
, (const char*)PADDING
, padLen
);
169 // Append length (before padding)
170 MD5Update (context
, (const char*)bits
, 8);
172 // Store state in digest
173 Encode (digest
, context
->state
, 16);
175 // Zeroize sensitive information.
176 memset ((POINTER
)context
, 0, sizeof (*context
));
179 // MD5 basic transformation. Transforms state based on block.
180 static void MD5Transform (
182 const uchar block
[64] )
184 UINT4 a
= state
[0], b
= state
[1], c
= state
[2], d
= state
[3], x
[16];
186 Decode (x
, block
, 64);
189 FF (a
, b
, c
, d
, x
[ 0], S11
, 0xd76aa478); // 1
190 FF (d
, a
, b
, c
, x
[ 1], S12
, 0xe8c7b756); // 2
191 FF (c
, d
, a
, b
, x
[ 2], S13
, 0x242070db); // 3
192 FF (b
, c
, d
, a
, x
[ 3], S14
, 0xc1bdceee); // 4
193 FF (a
, b
, c
, d
, x
[ 4], S11
, 0xf57c0faf); // 5
194 FF (d
, a
, b
, c
, x
[ 5], S12
, 0x4787c62a); // 6
195 FF (c
, d
, a
, b
, x
[ 6], S13
, 0xa8304613); // 7
196 FF (b
, c
, d
, a
, x
[ 7], S14
, 0xfd469501); // 8
197 FF (a
, b
, c
, d
, x
[ 8], S11
, 0x698098d8); // 9
198 FF (d
, a
, b
, c
, x
[ 9], S12
, 0x8b44f7af); // 10
199 FF (c
, d
, a
, b
, x
[10], S13
, 0xffff5bb1); // 11
200 FF (b
, c
, d
, a
, x
[11], S14
, 0x895cd7be); // 12
201 FF (a
, b
, c
, d
, x
[12], S11
, 0x6b901122); // 13
202 FF (d
, a
, b
, c
, x
[13], S12
, 0xfd987193); // 14
203 FF (c
, d
, a
, b
, x
[14], S13
, 0xa679438e); // 15
204 FF (b
, c
, d
, a
, x
[15], S14
, 0x49b40821); // 16
207 GG (a
, b
, c
, d
, x
[ 1], S21
, 0xf61e2562); // 17
208 GG (d
, a
, b
, c
, x
[ 6], S22
, 0xc040b340); // 18
209 GG (c
, d
, a
, b
, x
[11], S23
, 0x265e5a51); // 19
210 GG (b
, c
, d
, a
, x
[ 0], S24
, 0xe9b6c7aa); // 20
211 GG (a
, b
, c
, d
, x
[ 5], S21
, 0xd62f105d); // 21
212 GG (d
, a
, b
, c
, x
[10], S22
, 0x2441453); // 22
213 GG (c
, d
, a
, b
, x
[15], S23
, 0xd8a1e681); // 23
214 GG (b
, c
, d
, a
, x
[ 4], S24
, 0xe7d3fbc8); // 24
215 GG (a
, b
, c
, d
, x
[ 9], S21
, 0x21e1cde6); // 25
216 GG (d
, a
, b
, c
, x
[14], S22
, 0xc33707d6); // 26
217 GG (c
, d
, a
, b
, x
[ 3], S23
, 0xf4d50d87); // 27
218 GG (b
, c
, d
, a
, x
[ 8], S24
, 0x455a14ed); // 28
219 GG (a
, b
, c
, d
, x
[13], S21
, 0xa9e3e905); // 29
220 GG (d
, a
, b
, c
, x
[ 2], S22
, 0xfcefa3f8); // 30
221 GG (c
, d
, a
, b
, x
[ 7], S23
, 0x676f02d9); // 31
222 GG (b
, c
, d
, a
, x
[12], S24
, 0x8d2a4c8a); // 32
225 HH (a
, b
, c
, d
, x
[ 5], S31
, 0xfffa3942); // 33
226 HH (d
, a
, b
, c
, x
[ 8], S32
, 0x8771f681); // 34
227 HH (c
, d
, a
, b
, x
[11], S33
, 0x6d9d6122); // 35
228 HH (b
, c
, d
, a
, x
[14], S34
, 0xfde5380c); // 36
229 HH (a
, b
, c
, d
, x
[ 1], S31
, 0xa4beea44); // 37
230 HH (d
, a
, b
, c
, x
[ 4], S32
, 0x4bdecfa9); // 38
231 HH (c
, d
, a
, b
, x
[ 7], S33
, 0xf6bb4b60); // 39
232 HH (b
, c
, d
, a
, x
[10], S34
, 0xbebfbc70); // 40
233 HH (a
, b
, c
, d
, x
[13], S31
, 0x289b7ec6); // 41
234 HH (d
, a
, b
, c
, x
[ 0], S32
, 0xeaa127fa); // 42
235 HH (c
, d
, a
, b
, x
[ 3], S33
, 0xd4ef3085); // 43
236 HH (b
, c
, d
, a
, x
[ 6], S34
, 0x4881d05); // 44
237 HH (a
, b
, c
, d
, x
[ 9], S31
, 0xd9d4d039); // 45
238 HH (d
, a
, b
, c
, x
[12], S32
, 0xe6db99e5); // 46
239 HH (c
, d
, a
, b
, x
[15], S33
, 0x1fa27cf8); // 47
240 HH (b
, c
, d
, a
, x
[ 2], S34
, 0xc4ac5665); // 48
243 II (a
, b
, c
, d
, x
[ 0], S41
, 0xf4292244); // 49
244 II (d
, a
, b
, c
, x
[ 7], S42
, 0x432aff97); // 50
245 II (c
, d
, a
, b
, x
[14], S43
, 0xab9423a7); // 51
246 II (b
, c
, d
, a
, x
[ 5], S44
, 0xfc93a039); // 52
247 II (a
, b
, c
, d
, x
[12], S41
, 0x655b59c3); // 53
248 II (d
, a
, b
, c
, x
[ 3], S42
, 0x8f0ccc92); // 54
249 II (c
, d
, a
, b
, x
[10], S43
, 0xffeff47d); // 55
250 II (b
, c
, d
, a
, x
[ 1], S44
, 0x85845dd1); // 56
251 II (a
, b
, c
, d
, x
[ 8], S41
, 0x6fa87e4f); // 57
252 II (d
, a
, b
, c
, x
[15], S42
, 0xfe2ce6e0); // 58
253 II (c
, d
, a
, b
, x
[ 6], S43
, 0xa3014314); // 59
254 II (b
, c
, d
, a
, x
[13], S44
, 0x4e0811a1); // 60
255 II (a
, b
, c
, d
, x
[ 4], S41
, 0xf7537e82); // 61
256 II (d
, a
, b
, c
, x
[11], S42
, 0xbd3af235); // 62
257 II (c
, d
, a
, b
, x
[ 2], S43
, 0x2ad7d2bb); // 63
258 II (b
, c
, d
, a
, x
[ 9], S44
, 0xeb86d391); // 64
265 // Zeroize sensitive information.
266 memset ((POINTER
)x
, 0, sizeof (x
));
269 // Encodes input (UINT4) into output (unsigned char). Assumes len is
272 unsigned char *output
,
278 for (i
= 0, j
= 0; j
< len
; i
++, j
+= 4) {
279 output
[j
] = (unsigned char)(input
[i
] & 0xff);
280 output
[j
+1] = (unsigned char)((input
[i
] >> 8) & 0xff);
281 output
[j
+2] = (unsigned char)((input
[i
] >> 16) & 0xff);
282 output
[j
+3] = (unsigned char)((input
[i
] >> 24) & 0xff);
286 // Decodes input (unsigned char) into output (UINT4). Assumes len is
295 for (i
= 0, j
= 0; j
< len
; i
++, j
+= 4)
296 output
[i
] = ((UINT4
)input
[j
]) | (((UINT4
)input
[j
+1]) << 8) |
297 (((UINT4
)input
[j
+2]) << 16) | (((UINT4
)input
[j
+3]) << 24);
300 void digest2ascii ( char *ascii
, const unsigned char *digest
)
303 static char* table
= "0123456789abcdef";
304 for ( i
= 0; i
< 16; i
++ )
306 *ascii
++ = table
[(*digest
)>>4];
307 *ascii
++ = table
[(*digest
++)%16];
312 void ascii2digest ( unsigned char *digest
, const char *ascii
)
315 #define CONV(c) (unsigned char)( (toupper(c)>='A') ? (toupper(c)+10-'A') : ((c)-'0') )
316 #define MAKECHAR(a,b) ((CONV(a)%16)<<4)|(CONV(b)%16)
317 for ( i
= 0; i
< 16; i
++ )
319 *digest
++ = MAKECHAR(ascii
[0],ascii
[1]);
335 void MD5::Update ( const string
& s
)
337 MD5Update ( &_ctx
, s
.c_str(), s
.size() );
340 string
MD5::Final ( char* digest
)
344 MD5Final ( &v
[0], &_ctx
);
346 memmove ( digest
, &v
[0], 16 );
348 static char* tohex
= "0123456789abcdef";
349 for ( int i
= 0; i
< 16; i
++ )
352 s
+= tohex
[ (c
>>4) & 0xF ];
353 s
+= tohex
[ c
& 0xF ];
358 string
MD5Hex ( const string
& s
)
365 string
MD5Bin ( const string
& s
)
370 md5
.Final ( digest
);
371 return string ( digest
, 16 );
374 string
HMAC_MD5 ( const string
& key
, const string
& text
, char* out_bin
)
377 char k_ipad
[65]; // inner padding - key XORd with ipad
378 char k_opad
[65]; // outer padding - key XORd with opad
382 // if key is longer than 64 bytes reset it to key=MD5(key)
383 if ( key
.length() > 64 )
387 md5
.Final ( digest
);
388 tmp
= string ( digest
, 16 );
393 // start out by storing key in pads
394 memset ( k_ipad
, 0, sizeof(k_ipad
) );
395 memset ( k_opad
, 0, sizeof(k_opad
) );
396 memcpy ( k_ipad
, tmp
.c_str(), tmp
.length() );
397 memcpy ( k_opad
, tmp
.c_str(), tmp
.length() );
399 // XOR key with ipad and opad values
400 for ( i
=0; i
<64; i
++ )
410 md5
.Final ( digest
);
415 md5
.Update(string(digest
,16));
416 return md5
.Final(out_bin
);