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39
40/*
41 Based on the public domain implementation of the SHA-1 algorithm
42 Copyright (C) Dominik Reichl <dominik.reichl@t-online.de>
43*/
44#include <QtCore/qendian.h>
45
46#ifdef Q_CC_MSVC
47# include <stdlib.h>
48#endif
49
50QT_BEGIN_NAMESPACE
51
52// Test Vectors (from FIPS PUB 180-1)
53//
54// SHA1("abc") =
55// A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
56//
57// SHA1("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq") =
58// 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
59//
60// SHA1(A million repetitions of "a") =
61// 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
62//
63
64
65// #define or #undef this, if you want the to wipe all
66// temporary variables after processing
67#define SHA1_WIPE_VARIABLES
68
69
70struct Sha1State
71{
72 quint32 h0;
73 quint32 h1;
74 quint32 h2;
75 quint32 h3;
76 quint32 h4;
77
78 quint64 messageSize;
79 unsigned char buffer[64];
80};
81
82
83typedef union
84{
85 quint8 bytes[64];
86 quint32 words[16];
87} Sha1Chunk;
88
89static inline quint32 rol32(quint32 value, unsigned int shift)
90{
91#ifdef Q_CC_MSVC
92 return _rotl(value, shift);
93#else
94 return ((value << shift) | (value >> (32 - shift)));
95#endif
96}
97
98static inline quint32 sha1Word(Sha1Chunk *chunk, const uint position)
99{
100 return (chunk->words[position & 0xf] = rol32( value: chunk->words[(position+13) & 0xf]
101 ^ chunk->words[(position+ 8) & 0xf]
102 ^ chunk->words[(position+ 2) & 0xf]
103 ^ chunk->words[(position) & 0xf], shift: 1));
104}
105
106static inline void sha1Round0(Sha1Chunk *chunk, const uint position,
107 quint32 &v, quint32 &w, quint32 &x, quint32 &y, quint32 &z)
108{
109 z += ((( w & (x ^ y)) ^ y) + chunk->words[position] + 0x5A827999 + rol32(value: v, shift: 5));
110 w = rol32(value: w, shift: 30);
111}
112
113static inline void sha1Round1(Sha1Chunk *chunk, const uint position,
114 quint32 &v, quint32 &w, quint32 &x, quint32 &y, quint32 &z)
115{
116 z += ((( w & (x ^ y)) ^ y) + sha1Word(chunk,position) + 0x5A827999 + rol32(value: v, shift: 5));
117 w = rol32(value: w, shift: 30);
118}
119
120static inline void sha1Round2(Sha1Chunk *chunk, const uint position,
121 quint32 &v, quint32 &w, quint32 &x, quint32 &y, quint32 &z)
122{
123 z += (( w ^ x ^ y) + sha1Word(chunk, position) + 0x6ED9EBA1 + rol32(value: v, shift: 5));
124 w = rol32(value: w, shift: 30);
125}
126
127static inline void sha1Round3(Sha1Chunk *chunk, const uint position,
128 quint32 &v, quint32 &w, quint32 &x, quint32 &y, quint32 &z)
129{
130 z += (((( w | x) & y) | (w & x)) + sha1Word(chunk, position) + 0x8F1BBCDC + rol32(value: v, shift: 5));
131 w = rol32(value: w, shift: 30);
132}
133
134static inline void sha1Round4(Sha1Chunk *chunk, const uint position,
135 quint32 &v, quint32 &w, quint32 &x, quint32 &y, quint32 &z)
136{
137 z += ((w ^ x ^ y) + sha1Word(chunk, position) + 0xCA62C1D6 + rol32(value: v, shift: 5));
138 w = rol32(value: w, shift: 30);
139}
140
141static inline void sha1ProcessChunk(Sha1State *state, const unsigned char *buffer)
142{
143 // Copy state[] to working vars
144 quint32 a = state->h0;
145 quint32 b = state->h1;
146 quint32 c = state->h2;
147 quint32 d = state->h3;
148 quint32 e = state->h4;
149
150 quint8 chunkBuffer[64];
151 memcpy(dest: chunkBuffer, src: buffer, n: 64);
152
153 Sha1Chunk *chunk = reinterpret_cast<Sha1Chunk*>(&chunkBuffer);
154
155 for (int i = 0; i < 16; ++i)
156 chunk->words[i] = qFromBigEndian(source: chunk->words[i]);
157
158 sha1Round0(chunk, position: 0, v&: a,w&: b,x&: c,y&: d,z&: e); sha1Round0(chunk, position: 1, v&: e,w&: a,x&: b,y&: c,z&: d); sha1Round0(chunk, position: 2, v&: d,w&: e,x&: a,y&: b,z&: c); sha1Round0(chunk, position: 3, v&: c,w&: d,x&: e,y&: a,z&: b);
159 sha1Round0(chunk, position: 4, v&: b,w&: c,x&: d,y&: e,z&: a); sha1Round0(chunk, position: 5, v&: a,w&: b,x&: c,y&: d,z&: e); sha1Round0(chunk, position: 6, v&: e,w&: a,x&: b,y&: c,z&: d); sha1Round0(chunk, position: 7, v&: d,w&: e,x&: a,y&: b,z&: c);
160 sha1Round0(chunk, position: 8, v&: c,w&: d,x&: e,y&: a,z&: b); sha1Round0(chunk, position: 9, v&: b,w&: c,x&: d,y&: e,z&: a); sha1Round0(chunk, position: 10, v&: a,w&: b,x&: c,y&: d,z&: e); sha1Round0(chunk, position: 11, v&: e,w&: a,x&: b,y&: c,z&: d);
161 sha1Round0(chunk, position: 12, v&: d,w&: e,x&: a,y&: b,z&: c); sha1Round0(chunk, position: 13, v&: c,w&: d,x&: e,y&: a,z&: b); sha1Round0(chunk, position: 14, v&: b,w&: c,x&: d,y&: e,z&: a); sha1Round0(chunk, position: 15, v&: a,w&: b,x&: c,y&: d,z&: e);
162 sha1Round1(chunk, position: 16, v&: e,w&: a,x&: b,y&: c,z&: d); sha1Round1(chunk, position: 17, v&: d,w&: e,x&: a,y&: b,z&: c); sha1Round1(chunk, position: 18, v&: c,w&: d,x&: e,y&: a,z&: b); sha1Round1(chunk, position: 19, v&: b,w&: c,x&: d,y&: e,z&: a);
163 sha1Round2(chunk, position: 20, v&: a,w&: b,x&: c,y&: d,z&: e); sha1Round2(chunk, position: 21, v&: e,w&: a,x&: b,y&: c,z&: d); sha1Round2(chunk, position: 22, v&: d,w&: e,x&: a,y&: b,z&: c); sha1Round2(chunk, position: 23, v&: c,w&: d,x&: e,y&: a,z&: b);
164 sha1Round2(chunk, position: 24, v&: b,w&: c,x&: d,y&: e,z&: a); sha1Round2(chunk, position: 25, v&: a,w&: b,x&: c,y&: d,z&: e); sha1Round2(chunk, position: 26, v&: e,w&: a,x&: b,y&: c,z&: d); sha1Round2(chunk, position: 27, v&: d,w&: e,x&: a,y&: b,z&: c);
165 sha1Round2(chunk, position: 28, v&: c,w&: d,x&: e,y&: a,z&: b); sha1Round2(chunk, position: 29, v&: b,w&: c,x&: d,y&: e,z&: a); sha1Round2(chunk, position: 30, v&: a,w&: b,x&: c,y&: d,z&: e); sha1Round2(chunk, position: 31, v&: e,w&: a,x&: b,y&: c,z&: d);
166 sha1Round2(chunk, position: 32, v&: d,w&: e,x&: a,y&: b,z&: c); sha1Round2(chunk, position: 33, v&: c,w&: d,x&: e,y&: a,z&: b); sha1Round2(chunk, position: 34, v&: b,w&: c,x&: d,y&: e,z&: a); sha1Round2(chunk, position: 35, v&: a,w&: b,x&: c,y&: d,z&: e);
167 sha1Round2(chunk, position: 36, v&: e,w&: a,x&: b,y&: c,z&: d); sha1Round2(chunk, position: 37, v&: d,w&: e,x&: a,y&: b,z&: c); sha1Round2(chunk, position: 38, v&: c,w&: d,x&: e,y&: a,z&: b); sha1Round2(chunk, position: 39, v&: b,w&: c,x&: d,y&: e,z&: a);
168 sha1Round3(chunk, position: 40, v&: a,w&: b,x&: c,y&: d,z&: e); sha1Round3(chunk, position: 41, v&: e,w&: a,x&: b,y&: c,z&: d); sha1Round3(chunk, position: 42, v&: d,w&: e,x&: a,y&: b,z&: c); sha1Round3(chunk, position: 43, v&: c,w&: d,x&: e,y&: a,z&: b);
169 sha1Round3(chunk, position: 44, v&: b,w&: c,x&: d,y&: e,z&: a); sha1Round3(chunk, position: 45, v&: a,w&: b,x&: c,y&: d,z&: e); sha1Round3(chunk, position: 46, v&: e,w&: a,x&: b,y&: c,z&: d); sha1Round3(chunk, position: 47, v&: d,w&: e,x&: a,y&: b,z&: c);
170 sha1Round3(chunk, position: 48, v&: c,w&: d,x&: e,y&: a,z&: b); sha1Round3(chunk, position: 49, v&: b,w&: c,x&: d,y&: e,z&: a); sha1Round3(chunk, position: 50, v&: a,w&: b,x&: c,y&: d,z&: e); sha1Round3(chunk, position: 51, v&: e,w&: a,x&: b,y&: c,z&: d);
171 sha1Round3(chunk, position: 52, v&: d,w&: e,x&: a,y&: b,z&: c); sha1Round3(chunk, position: 53, v&: c,w&: d,x&: e,y&: a,z&: b); sha1Round3(chunk, position: 54, v&: b,w&: c,x&: d,y&: e,z&: a); sha1Round3(chunk, position: 55, v&: a,w&: b,x&: c,y&: d,z&: e);
172 sha1Round3(chunk, position: 56, v&: e,w&: a,x&: b,y&: c,z&: d); sha1Round3(chunk, position: 57, v&: d,w&: e,x&: a,y&: b,z&: c); sha1Round3(chunk, position: 58, v&: c,w&: d,x&: e,y&: a,z&: b); sha1Round3(chunk, position: 59, v&: b,w&: c,x&: d,y&: e,z&: a);
173 sha1Round4(chunk, position: 60, v&: a,w&: b,x&: c,y&: d,z&: e); sha1Round4(chunk, position: 61, v&: e,w&: a,x&: b,y&: c,z&: d); sha1Round4(chunk, position: 62, v&: d,w&: e,x&: a,y&: b,z&: c); sha1Round4(chunk, position: 63, v&: c,w&: d,x&: e,y&: a,z&: b);
174 sha1Round4(chunk, position: 64, v&: b,w&: c,x&: d,y&: e,z&: a); sha1Round4(chunk, position: 65, v&: a,w&: b,x&: c,y&: d,z&: e); sha1Round4(chunk, position: 66, v&: e,w&: a,x&: b,y&: c,z&: d); sha1Round4(chunk, position: 67, v&: d,w&: e,x&: a,y&: b,z&: c);
175 sha1Round4(chunk, position: 68, v&: c,w&: d,x&: e,y&: a,z&: b); sha1Round4(chunk, position: 69, v&: b,w&: c,x&: d,y&: e,z&: a); sha1Round4(chunk, position: 70, v&: a,w&: b,x&: c,y&: d,z&: e); sha1Round4(chunk, position: 71, v&: e,w&: a,x&: b,y&: c,z&: d);
176 sha1Round4(chunk, position: 72, v&: d,w&: e,x&: a,y&: b,z&: c); sha1Round4(chunk, position: 73, v&: c,w&: d,x&: e,y&: a,z&: b); sha1Round4(chunk, position: 74, v&: b,w&: c,x&: d,y&: e,z&: a); sha1Round4(chunk, position: 75, v&: a,w&: b,x&: c,y&: d,z&: e);
177 sha1Round4(chunk, position: 76, v&: e,w&: a,x&: b,y&: c,z&: d); sha1Round4(chunk, position: 77, v&: d,w&: e,x&: a,y&: b,z&: c); sha1Round4(chunk, position: 78, v&: c,w&: d,x&: e,y&: a,z&: b); sha1Round4(chunk, position: 79, v&: b,w&: c,x&: d,y&: e,z&: a);
178
179 // Add the working vars back into state
180 state->h0 += a;
181 state->h1 += b;
182 state->h2 += c;
183 state->h3 += d;
184 state->h4 += e;
185
186 // Wipe variables
187#ifdef SHA1_WIPE_VARIABLES
188 a = b = c = d = e = 0;
189 memset(s: chunkBuffer, c: 0, n: 64);
190#endif
191}
192
193static inline void sha1InitState(Sha1State *state)
194{
195 state->h0 = 0x67452301;
196 state->h1 = 0xEFCDAB89;
197 state->h2 = 0x98BADCFE;
198 state->h3 = 0x10325476;
199 state->h4 = 0xC3D2E1F0;
200
201 state->messageSize = 0;
202}
203
204static inline void sha1Update(Sha1State *state, const unsigned char *data, qint64 len)
205{
206 quint32 rest = static_cast<quint32>(state->messageSize & Q_UINT64_C(63));
207
208 quint64 availableData = static_cast<quint64>(len) + static_cast<quint64>(rest);
209 state->messageSize += len;
210
211 if (availableData < Q_UINT64_C(64)) {
212 memcpy(dest: &state->buffer[rest], src: &data[0], n: len);
213
214 } else {
215 qint64 i = static_cast<qint64>(64 - rest);
216 memcpy(dest: &state->buffer[rest], src: &data[0], n: static_cast<qint32>(i));
217 sha1ProcessChunk(state, buffer: state->buffer);
218
219 qint64 lastI = len - ((len + rest) & Q_INT64_C(63));
220 for( ; i < lastI; i += 64)
221 sha1ProcessChunk(state, buffer: &data[i]);
222
223 memcpy(dest: &state->buffer[0], src: &data[i], n: len - i);
224 }
225}
226
227static inline void sha1FinalizeState(Sha1State *state)
228{
229 quint64 messageSize = state->messageSize;
230 unsigned char sizeInBits[8];
231 qToBigEndian(src: messageSize << 3, dest: sizeInBits);
232
233 sha1Update(state, data: (const unsigned char *)"\200", len: 1);
234
235 unsigned char zero[64];
236 memset(s: zero, c: 0, n: 64);
237 if (static_cast<int>(messageSize & 63) > 56 - 1) {
238 sha1Update(state, data: zero, len: 64 - 1 - static_cast<int>(messageSize & 63));
239 sha1Update(state, data: zero, len: 64 - 8);
240 } else {
241 sha1Update(state, data: zero, len: 64 - 1 - 8 - static_cast<int>(messageSize & 63));
242 }
243
244 sha1Update(state, data: sizeInBits, len: 8);
245#ifdef SHA1_WIPE_VARIABLES
246 memset(s: state->buffer, c: 0, n: 64);
247 memset(s: zero, c: 0, n: 64);
248 state->messageSize = 0;
249#endif
250}
251
252static inline void sha1ToHash(Sha1State *state, unsigned char* buffer)
253{
254 qToBigEndian(src: state->h0, dest: buffer);
255 qToBigEndian(src: state->h1, dest: buffer + 4);
256 qToBigEndian(src: state->h2, dest: buffer + 8);
257 qToBigEndian(src: state->h3, dest: buffer + 12);
258 qToBigEndian(src: state->h4, dest: buffer + 16);
259}
260
261QT_END_NAMESPACE
262

source code of qtbase/src/3rdparty/sha1/sha1.cpp