| 1 | /* derived from the RSA Data Security, Inc. MD5 Message-Digest Algorithm */
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| 2 | #include <qstring.h>
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| 3 | #include "qtmd5.h"
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| 4 |
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| 5 | typedef unsigned char *POINTER;
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| 6 | typedef unsigned short int UINT2;
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| 7 | typedef unsigned long int UINT4;
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| 8 |
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| 9 | typedef struct {
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| 10 | UINT4 state[4]; // state(ABCD)
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| 11 | UINT4 count[2]; // number of bits, modulo 2^64(lsb first)
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| 12 | unsigned char buffer[64]; // input buffer
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| 13 | } MD5_CTX;
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| 14 |
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| 15 | static void MD5Init(MD5_CTX *);
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| 16 | static void MD5Update(MD5_CTX *, unsigned char *, unsigned int);
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| 17 | static void MD5Final(unsigned char [16], MD5_CTX *);
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| 18 | static void MD5Transform(UINT4[4], unsigned char[64]);
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| 19 | static void Encode(unsigned char *, UINT4 *, unsigned int);
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| 20 | static void Decode(UINT4 *, unsigned char *, unsigned int);
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| 21 | static void MD5_memset(POINTER, int, unsigned int);
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| 22 | static void MD5_memcpy(POINTER output,POINTER input,unsigned int len);
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| 23 |
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| 24 | // Constants for MD5Transform routine.
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| 25 | enum {
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| 26 | S11 = 7, S12 = 12, S13 = 17, S14 = 22, S21 = 5, S22 = 9, S23 = 14, S24 = 20,
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| 27 | S31 = 4, S32 = 11, S33 = 16, S34 = 23, S41 = 6, S42 = 10, S43 = 15, S44 = 21
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| 28 | };
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| 29 |
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| 30 | static unsigned char PADDING[64] = {
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| 31 | 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 32 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 33 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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| 34 | };
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| 35 |
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| 36 | // F, G, H and I are basic MD5 functions.
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| 37 | static inline UINT4 F(UINT4 x, UINT4 y, UINT4 z)
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| 38 | {
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| 39 | return(x & y) |((~x) & z);
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| 40 | }
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| 41 |
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| 42 | static inline UINT4 G(UINT4 x, UINT4 y, UINT4 z)
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| 43 | {
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| 44 | return(x & z) |(y &(~z));
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| 45 | }
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| 46 |
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| 47 | static inline UINT4 H(UINT4 x, UINT4 y, UINT4 z)
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| 48 | {
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| 49 | return x ^ y ^ z;
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| 50 | }
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| 51 |
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| 52 | static inline UINT4 I(UINT4 x, UINT4 y, UINT4 z)
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| 53 | {
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| 54 | return y ^(x |(~z));
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| 55 | }
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| 56 |
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| 57 | static inline UINT4 rotateLeft(UINT4 x, UINT4 n)
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| 58 | {
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| 59 | return(x << n) |(x >>(32-(n)));
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| 60 | }
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| 61 |
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| 62 | // FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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| 63 | // Rotation is separate from addition to prevent recomputation.
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| 64 | static inline void FF(UINT4 &a, UINT4 b, UINT4 c, UINT4 d, UINT4 x, UINT4 s, UINT4 ac)
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| 65 | {
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| 66 | a += F(b, c, d) + x + ac;
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| 67 | a = rotateLeft(a, s);
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| 68 | a += b;
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| 69 | }
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| 70 |
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| 71 | static inline void GG(UINT4 &a, UINT4 b, UINT4 c, UINT4 d, UINT4 x, UINT4 s, UINT4 ac)
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| 72 | {
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| 73 | a += G(b, c, d) + x +(UINT4)(ac);
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| 74 | a = rotateLeft(a, s);
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| 75 | a += b;
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| 76 | }
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| 77 |
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| 78 | static inline void HH(UINT4 &a, UINT4 b, UINT4 c, UINT4 d, UINT4 x, UINT4 s, UINT4 ac)
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| 79 | {
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| 80 | a += H(b, c, d) + x +(UINT4)(ac);
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| 81 | a = rotateLeft(a, s);
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| 82 | a += b;
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| 83 | }
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| 84 |
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| 85 | static inline void II(UINT4 &a, UINT4 b, UINT4 c, UINT4 d, UINT4 x, UINT4 s, UINT4 ac)
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| 86 | {
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| 87 | a += I(b, c, d) + x +(UINT4)(ac);
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| 88 | a = rotateLeft(a, s);
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| 89 | a += b;
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| 90 | }
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| 91 |
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| 92 | // MD5 initialization. Begins an MD5 operation, writing a new context.
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| 93 | static void MD5Init(MD5_CTX *context)
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| 94 | {
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| 95 | context->count[0] = context->count[1] = 0;
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| 96 |
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| 97 | // Load magic initialization constants.
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| 98 | context->state[0] = 0x67452301;
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| 99 | context->state[1] = 0xefcdab89;
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| 100 | context->state[2] = 0x98badcfe;
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| 101 | context->state[3] = 0x10325476;
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| 102 | }
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| 103 |
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| 104 | // MD5 block update operation. Continues an MD5 message-digest
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| 105 | // operation, processing another message block, and updating the
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| 106 | // context.
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| 107 | static void MD5Update(MD5_CTX *context, unsigned char *input, unsigned int inputLen)
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| 108 | {
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| 109 | unsigned int i, index, partLen;
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| 110 | // Compute number of bytes mod 64
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| 111 | index =(unsigned int)((context->count[0] >> 3) & 0x3F);
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| 112 |
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| 113 | // Update number of bits
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| 114 | if ((context->count[0] +=((UINT4)inputLen << 3)) <((UINT4)inputLen << 3))
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| 115 | context->count[1]++;
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| 116 |
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| 117 | context->count[1] +=((UINT4)inputLen >> 29);
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| 118 | partLen = 64 - index;
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| 119 |
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| 120 | // Transform as many times as possible.
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| 121 | if (inputLen >= partLen) {
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| 122 | MD5_memcpy((POINTER)&context->buffer[index],(POINTER)input, partLen);
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| 123 | MD5Transform(context->state, context->buffer);
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| 124 | for (i = partLen; i + 63 < inputLen; i += 64)
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| 125 | MD5Transform(context->state, &input[i]);
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| 126 | index = 0;
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| 127 | } else {
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| 128 | i = 0;
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| 129 | }
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| 130 |
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| 131 | // Buffer remaining input
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| 132 | MD5_memcpy((POINTER)&context->buffer[index],(POINTER)&input[i],
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| 133 | inputLen-i);
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| 134 | }
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| 135 |
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| 136 | // MD5 finalization. Ends an MD5 message-digest operation, writing the
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| 137 | // the message digest and zeroizing the context.
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| 138 | static void MD5Final(unsigned char digest[16], MD5_CTX *context)
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| 139 | {
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| 140 | unsigned char bits[8];
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| 141 | unsigned int index, padLen;
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| 142 |
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| 143 | // Save number of bits
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| 144 | Encode(bits, context->count, 8);
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| 145 |
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| 146 | // Pad out to 56 mod 64.
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| 147 | index =(unsigned int)((context->count[0] >> 3) & 0x3f);
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| 148 | padLen =(index < 56) ?(56 - index) :(120 - index);
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| 149 | MD5Update(context, PADDING, padLen);
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| 150 |
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| 151 | // Append length(before padding)
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| 152 | MD5Update(context, bits, 8);
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| 153 |
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| 154 | // Store state in digest
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| 155 | Encode(digest, context->state, 16);
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| 156 |
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| 157 | // Zeroize sensitive information.
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| 158 | MD5_memset((POINTER)context, 0, sizeof(*context));
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| 159 | }
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| 160 |
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| 161 | // MD5 basic transformation. Transforms state based on block.
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| 162 | static void MD5Transform(UINT4 state[4], unsigned char block[64])
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| 163 | {
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| 164 | UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
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| 165 | Decode(x, block, 64);
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| 166 |
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| 167 | // Round 1
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| 168 | FF(a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
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| 169 | FF(d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
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| 170 | FF(c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
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| 171 | FF(b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
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| 172 | FF(a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
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| 173 | FF(d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
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| 174 | FF(c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
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| 175 | FF(b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
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| 176 | FF(a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
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| 177 | FF(d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
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| 178 | FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
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| 179 | FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
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| 180 | FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
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| 181 | FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
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| 182 | FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
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| 183 | FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
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| 184 |
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| 185 | // Round 2
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| 186 | GG(a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
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| 187 | GG(d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
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| 188 | GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
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| 189 | GG(b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
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| 190 | GG(a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
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| 191 | GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
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| 192 | GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
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| 193 | GG(b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
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| 194 | GG(a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
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| 195 | GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
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| 196 | GG(c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
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| 197 | GG(b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
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| 198 | GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
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| 199 | GG(d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
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| 200 | GG(c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
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| 201 | GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
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| 202 |
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| 203 | // Round 3
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| 204 | HH(a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
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| 205 | HH(d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
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| 206 | HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
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| 207 | HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
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| 208 | HH(a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
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| 209 | HH(d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
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| 210 | HH(c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
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| 211 | HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
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| 212 | HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
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| 213 | HH(d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
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| 214 | HH(c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
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| 215 | HH(b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */
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| 216 | HH(a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
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| 217 | HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
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| 218 | HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
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| 219 | HH(b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
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| 220 |
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| 221 | // Round 4
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| 222 | II(a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
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| 223 | II(d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
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| 224 | II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
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| 225 | II(b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
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| 226 | II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
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| 227 | II(d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
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| 228 | II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
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| 229 | II(b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
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| 230 | II(a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
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| 231 | II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
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| 232 | II(c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
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| 233 | II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
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| 234 | II(a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
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| 235 | II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
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| 236 | II(c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
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| 237 | II(b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
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| 238 | state[0] += a;
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| 239 | state[1] += b;
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| 240 | state[2] += c;
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| 241 | state[3] += d;
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| 242 |
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| 243 | // Zeroize sensitive information.
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| 244 | MD5_memset((POINTER)x, 0, sizeof(x));
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| 245 | }
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| 246 |
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| 247 | // Encodes input(UINT4) into output(unsigned char). Assumes len is a
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| 248 | // multiple of 4.
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| 249 | static void Encode(unsigned char *output, UINT4 *input, unsigned int len)
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| 250 | {
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| 251 | unsigned int i, j;
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| 252 | for (i = 0, j = 0; j < len; i++, j += 4) {
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| 253 | output[j] = (unsigned char) (input[i] & 0xff);
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| 254 | output[j+1] = (unsigned char) ((input[i] >> 8) & 0xff);
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| 255 | output[j+2] = (unsigned char) ((input[i] >> 16) & 0xff);
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| 256 | output[j+3] = (unsigned char) ((input[i] >> 24) & 0xff);
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| 257 | }
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| 258 | }
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| 259 |
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| 260 | // Decodes input(unsigned char) into output(UINT4). Assumes len is a
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| 261 | // multiple of 4.
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| 262 | static void Decode(UINT4 *output, unsigned char *input, unsigned int len)
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| 263 | {
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| 264 | unsigned int i, j;
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| 265 | for (i = 0, j = 0; j < len; i++, j += 4)
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| 266 | output[i] =((UINT4)input[j]) |(((UINT4)input[j+1]) << 8) |
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| 267 | (((UINT4)input[j+2]) << 16) |(((UINT4)input[j+3]) << 24);
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| 268 | }
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| 269 |
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| 270 | // Note: Replace "for loop" with standard memset if possible.
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| 271 | static void MD5_memset(POINTER output, int value, unsigned int len)
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| 272 | {
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| 273 | unsigned int i;
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| 274 | for (i = 0; i < len; i++)
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| 275 | ((char *)output)[i] =(char)value;
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| 276 | }
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| 277 |
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| 278 | // Note: Replace "for loop" with standard memcpy if possible.
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| 279 | static void MD5_memcpy(POINTER output,POINTER input,unsigned int len)
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| 280 | {
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| 281 | unsigned int i;
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| 282 | for (i = 0; i < len; i++)
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| 283 | output[i] = input[i];
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| 284 | }
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| 285 |
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| 286 | void qtMD5(const QByteArray &src, unsigned char *digest)
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| 287 | {
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| 288 | MD5_CTX context;
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| 289 |
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| 290 | MD5Init(&context);
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| 291 | MD5Update(&context, (unsigned char *) src.data(), src.size());
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| 292 | MD5Final(digest, &context);
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| 293 | }
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| 294 |
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| 295 | QString qtMD5(const QByteArray &src)
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| 296 | {
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| 297 | unsigned char digest[16];
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| 298 | qtMD5(src, digest);
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| 299 |
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| 300 | QString output, tmp;
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| 301 | for (int i = 0; i < 16; ++i)
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| 302 | output += tmp.sprintf("%02x", digest[i]);
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| 303 | return output;
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| 304 | }
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