ripemd160.cpp raw
1 // Copyright (c) 2014-present The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5 #include <crypto/ripemd160.h>
6
7 #include <crypto/common.h>
8
9 #include <cstring>
10
11 // Internal implementation code.
12 namespace
13 {
14 /// Internal RIPEMD-160 implementation.
15 namespace ripemd160
16 {
17 uint32_t inline f1(uint32_t x, uint32_t y, uint32_t z) { return x ^ y ^ z; }
18 uint32_t inline f2(uint32_t x, uint32_t y, uint32_t z) { return (x & y) | (~x & z); }
19 uint32_t inline f3(uint32_t x, uint32_t y, uint32_t z) { return (x | ~y) ^ z; }
20 uint32_t inline f4(uint32_t x, uint32_t y, uint32_t z) { return (x & z) | (y & ~z); }
21 uint32_t inline f5(uint32_t x, uint32_t y, uint32_t z) { return x ^ (y | ~z); }
22
23 /** Initialize RIPEMD-160 state. */
24 void inline Initialize(uint32_t* s)
25 {
26 s[0] = 0x67452301ul;
27 s[1] = 0xEFCDAB89ul;
28 s[2] = 0x98BADCFEul;
29 s[3] = 0x10325476ul;
30 s[4] = 0xC3D2E1F0ul;
31 }
32
33 uint32_t inline rol(uint32_t x, int i) { return (x << i) | (x >> (32 - i)); }
34
35 void inline Round(uint32_t& a, uint32_t b, uint32_t& c, uint32_t d, uint32_t e, uint32_t f, uint32_t x, uint32_t k, int r)
36 {
37 a = rol(a + f + x + k, r) + e;
38 c = rol(c, 10);
39 }
40
41 void inline R11(uint32_t& a, uint32_t b, uint32_t& c, uint32_t d, uint32_t e, uint32_t x, int r) { Round(a, b, c, d, e, f1(b, c, d), x, 0, r); }
42 void inline R21(uint32_t& a, uint32_t b, uint32_t& c, uint32_t d, uint32_t e, uint32_t x, int r) { Round(a, b, c, d, e, f2(b, c, d), x, 0x5A827999ul, r); }
43 void inline R31(uint32_t& a, uint32_t b, uint32_t& c, uint32_t d, uint32_t e, uint32_t x, int r) { Round(a, b, c, d, e, f3(b, c, d), x, 0x6ED9EBA1ul, r); }
44 void inline R41(uint32_t& a, uint32_t b, uint32_t& c, uint32_t d, uint32_t e, uint32_t x, int r) { Round(a, b, c, d, e, f4(b, c, d), x, 0x8F1BBCDCul, r); }
45 void inline R51(uint32_t& a, uint32_t b, uint32_t& c, uint32_t d, uint32_t e, uint32_t x, int r) { Round(a, b, c, d, e, f5(b, c, d), x, 0xA953FD4Eul, r); }
46
47 void inline R12(uint32_t& a, uint32_t b, uint32_t& c, uint32_t d, uint32_t e, uint32_t x, int r) { Round(a, b, c, d, e, f5(b, c, d), x, 0x50A28BE6ul, r); }
48 void inline R22(uint32_t& a, uint32_t b, uint32_t& c, uint32_t d, uint32_t e, uint32_t x, int r) { Round(a, b, c, d, e, f4(b, c, d), x, 0x5C4DD124ul, r); }
49 void inline R32(uint32_t& a, uint32_t b, uint32_t& c, uint32_t d, uint32_t e, uint32_t x, int r) { Round(a, b, c, d, e, f3(b, c, d), x, 0x6D703EF3ul, r); }
50 void inline R42(uint32_t& a, uint32_t b, uint32_t& c, uint32_t d, uint32_t e, uint32_t x, int r) { Round(a, b, c, d, e, f2(b, c, d), x, 0x7A6D76E9ul, r); }
51 void inline R52(uint32_t& a, uint32_t b, uint32_t& c, uint32_t d, uint32_t e, uint32_t x, int r) { Round(a, b, c, d, e, f1(b, c, d), x, 0, r); }
52
53 /** Perform a RIPEMD-160 transformation, processing a 64-byte chunk. */
54 void Transform(uint32_t* s, const unsigned char* chunk)
55 {
56 uint32_t a1 = s[0], b1 = s[1], c1 = s[2], d1 = s[3], e1 = s[4];
57 uint32_t a2 = a1, b2 = b1, c2 = c1, d2 = d1, e2 = e1;
58 uint32_t w0 = ReadLE32(chunk + 0), w1 = ReadLE32(chunk + 4), w2 = ReadLE32(chunk + 8), w3 = ReadLE32(chunk + 12);
59 uint32_t w4 = ReadLE32(chunk + 16), w5 = ReadLE32(chunk + 20), w6 = ReadLE32(chunk + 24), w7 = ReadLE32(chunk + 28);
60 uint32_t w8 = ReadLE32(chunk + 32), w9 = ReadLE32(chunk + 36), w10 = ReadLE32(chunk + 40), w11 = ReadLE32(chunk + 44);
61 uint32_t w12 = ReadLE32(chunk + 48), w13 = ReadLE32(chunk + 52), w14 = ReadLE32(chunk + 56), w15 = ReadLE32(chunk + 60);
62
63 R11(a1, b1, c1, d1, e1, w0, 11);
64 R12(a2, b2, c2, d2, e2, w5, 8);
65 R11(e1, a1, b1, c1, d1, w1, 14);
66 R12(e2, a2, b2, c2, d2, w14, 9);
67 R11(d1, e1, a1, b1, c1, w2, 15);
68 R12(d2, e2, a2, b2, c2, w7, 9);
69 R11(c1, d1, e1, a1, b1, w3, 12);
70 R12(c2, d2, e2, a2, b2, w0, 11);
71 R11(b1, c1, d1, e1, a1, w4, 5);
72 R12(b2, c2, d2, e2, a2, w9, 13);
73 R11(a1, b1, c1, d1, e1, w5, 8);
74 R12(a2, b2, c2, d2, e2, w2, 15);
75 R11(e1, a1, b1, c1, d1, w6, 7);
76 R12(e2, a2, b2, c2, d2, w11, 15);
77 R11(d1, e1, a1, b1, c1, w7, 9);
78 R12(d2, e2, a2, b2, c2, w4, 5);
79 R11(c1, d1, e1, a1, b1, w8, 11);
80 R12(c2, d2, e2, a2, b2, w13, 7);
81 R11(b1, c1, d1, e1, a1, w9, 13);
82 R12(b2, c2, d2, e2, a2, w6, 7);
83 R11(a1, b1, c1, d1, e1, w10, 14);
84 R12(a2, b2, c2, d2, e2, w15, 8);
85 R11(e1, a1, b1, c1, d1, w11, 15);
86 R12(e2, a2, b2, c2, d2, w8, 11);
87 R11(d1, e1, a1, b1, c1, w12, 6);
88 R12(d2, e2, a2, b2, c2, w1, 14);
89 R11(c1, d1, e1, a1, b1, w13, 7);
90 R12(c2, d2, e2, a2, b2, w10, 14);
91 R11(b1, c1, d1, e1, a1, w14, 9);
92 R12(b2, c2, d2, e2, a2, w3, 12);
93 R11(a1, b1, c1, d1, e1, w15, 8);
94 R12(a2, b2, c2, d2, e2, w12, 6);
95
96 R21(e1, a1, b1, c1, d1, w7, 7);
97 R22(e2, a2, b2, c2, d2, w6, 9);
98 R21(d1, e1, a1, b1, c1, w4, 6);
99 R22(d2, e2, a2, b2, c2, w11, 13);
100 R21(c1, d1, e1, a1, b1, w13, 8);
101 R22(c2, d2, e2, a2, b2, w3, 15);
102 R21(b1, c1, d1, e1, a1, w1, 13);
103 R22(b2, c2, d2, e2, a2, w7, 7);
104 R21(a1, b1, c1, d1, e1, w10, 11);
105 R22(a2, b2, c2, d2, e2, w0, 12);
106 R21(e1, a1, b1, c1, d1, w6, 9);
107 R22(e2, a2, b2, c2, d2, w13, 8);
108 R21(d1, e1, a1, b1, c1, w15, 7);
109 R22(d2, e2, a2, b2, c2, w5, 9);
110 R21(c1, d1, e1, a1, b1, w3, 15);
111 R22(c2, d2, e2, a2, b2, w10, 11);
112 R21(b1, c1, d1, e1, a1, w12, 7);
113 R22(b2, c2, d2, e2, a2, w14, 7);
114 R21(a1, b1, c1, d1, e1, w0, 12);
115 R22(a2, b2, c2, d2, e2, w15, 7);
116 R21(e1, a1, b1, c1, d1, w9, 15);
117 R22(e2, a2, b2, c2, d2, w8, 12);
118 R21(d1, e1, a1, b1, c1, w5, 9);
119 R22(d2, e2, a2, b2, c2, w12, 7);
120 R21(c1, d1, e1, a1, b1, w2, 11);
121 R22(c2, d2, e2, a2, b2, w4, 6);
122 R21(b1, c1, d1, e1, a1, w14, 7);
123 R22(b2, c2, d2, e2, a2, w9, 15);
124 R21(a1, b1, c1, d1, e1, w11, 13);
125 R22(a2, b2, c2, d2, e2, w1, 13);
126 R21(e1, a1, b1, c1, d1, w8, 12);
127 R22(e2, a2, b2, c2, d2, w2, 11);
128
129 R31(d1, e1, a1, b1, c1, w3, 11);
130 R32(d2, e2, a2, b2, c2, w15, 9);
131 R31(c1, d1, e1, a1, b1, w10, 13);
132 R32(c2, d2, e2, a2, b2, w5, 7);
133 R31(b1, c1, d1, e1, a1, w14, 6);
134 R32(b2, c2, d2, e2, a2, w1, 15);
135 R31(a1, b1, c1, d1, e1, w4, 7);
136 R32(a2, b2, c2, d2, e2, w3, 11);
137 R31(e1, a1, b1, c1, d1, w9, 14);
138 R32(e2, a2, b2, c2, d2, w7, 8);
139 R31(d1, e1, a1, b1, c1, w15, 9);
140 R32(d2, e2, a2, b2, c2, w14, 6);
141 R31(c1, d1, e1, a1, b1, w8, 13);
142 R32(c2, d2, e2, a2, b2, w6, 6);
143 R31(b1, c1, d1, e1, a1, w1, 15);
144 R32(b2, c2, d2, e2, a2, w9, 14);
145 R31(a1, b1, c1, d1, e1, w2, 14);
146 R32(a2, b2, c2, d2, e2, w11, 12);
147 R31(e1, a1, b1, c1, d1, w7, 8);
148 R32(e2, a2, b2, c2, d2, w8, 13);
149 R31(d1, e1, a1, b1, c1, w0, 13);
150 R32(d2, e2, a2, b2, c2, w12, 5);
151 R31(c1, d1, e1, a1, b1, w6, 6);
152 R32(c2, d2, e2, a2, b2, w2, 14);
153 R31(b1, c1, d1, e1, a1, w13, 5);
154 R32(b2, c2, d2, e2, a2, w10, 13);
155 R31(a1, b1, c1, d1, e1, w11, 12);
156 R32(a2, b2, c2, d2, e2, w0, 13);
157 R31(e1, a1, b1, c1, d1, w5, 7);
158 R32(e2, a2, b2, c2, d2, w4, 7);
159 R31(d1, e1, a1, b1, c1, w12, 5);
160 R32(d2, e2, a2, b2, c2, w13, 5);
161
162 R41(c1, d1, e1, a1, b1, w1, 11);
163 R42(c2, d2, e2, a2, b2, w8, 15);
164 R41(b1, c1, d1, e1, a1, w9, 12);
165 R42(b2, c2, d2, e2, a2, w6, 5);
166 R41(a1, b1, c1, d1, e1, w11, 14);
167 R42(a2, b2, c2, d2, e2, w4, 8);
168 R41(e1, a1, b1, c1, d1, w10, 15);
169 R42(e2, a2, b2, c2, d2, w1, 11);
170 R41(d1, e1, a1, b1, c1, w0, 14);
171 R42(d2, e2, a2, b2, c2, w3, 14);
172 R41(c1, d1, e1, a1, b1, w8, 15);
173 R42(c2, d2, e2, a2, b2, w11, 14);
174 R41(b1, c1, d1, e1, a1, w12, 9);
175 R42(b2, c2, d2, e2, a2, w15, 6);
176 R41(a1, b1, c1, d1, e1, w4, 8);
177 R42(a2, b2, c2, d2, e2, w0, 14);
178 R41(e1, a1, b1, c1, d1, w13, 9);
179 R42(e2, a2, b2, c2, d2, w5, 6);
180 R41(d1, e1, a1, b1, c1, w3, 14);
181 R42(d2, e2, a2, b2, c2, w12, 9);
182 R41(c1, d1, e1, a1, b1, w7, 5);
183 R42(c2, d2, e2, a2, b2, w2, 12);
184 R41(b1, c1, d1, e1, a1, w15, 6);
185 R42(b2, c2, d2, e2, a2, w13, 9);
186 R41(a1, b1, c1, d1, e1, w14, 8);
187 R42(a2, b2, c2, d2, e2, w9, 12);
188 R41(e1, a1, b1, c1, d1, w5, 6);
189 R42(e2, a2, b2, c2, d2, w7, 5);
190 R41(d1, e1, a1, b1, c1, w6, 5);
191 R42(d2, e2, a2, b2, c2, w10, 15);
192 R41(c1, d1, e1, a1, b1, w2, 12);
193 R42(c2, d2, e2, a2, b2, w14, 8);
194
195 R51(b1, c1, d1, e1, a1, w4, 9);
196 R52(b2, c2, d2, e2, a2, w12, 8);
197 R51(a1, b1, c1, d1, e1, w0, 15);
198 R52(a2, b2, c2, d2, e2, w15, 5);
199 R51(e1, a1, b1, c1, d1, w5, 5);
200 R52(e2, a2, b2, c2, d2, w10, 12);
201 R51(d1, e1, a1, b1, c1, w9, 11);
202 R52(d2, e2, a2, b2, c2, w4, 9);
203 R51(c1, d1, e1, a1, b1, w7, 6);
204 R52(c2, d2, e2, a2, b2, w1, 12);
205 R51(b1, c1, d1, e1, a1, w12, 8);
206 R52(b2, c2, d2, e2, a2, w5, 5);
207 R51(a1, b1, c1, d1, e1, w2, 13);
208 R52(a2, b2, c2, d2, e2, w8, 14);
209 R51(e1, a1, b1, c1, d1, w10, 12);
210 R52(e2, a2, b2, c2, d2, w7, 6);
211 R51(d1, e1, a1, b1, c1, w14, 5);
212 R52(d2, e2, a2, b2, c2, w6, 8);
213 R51(c1, d1, e1, a1, b1, w1, 12);
214 R52(c2, d2, e2, a2, b2, w2, 13);
215 R51(b1, c1, d1, e1, a1, w3, 13);
216 R52(b2, c2, d2, e2, a2, w13, 6);
217 R51(a1, b1, c1, d1, e1, w8, 14);
218 R52(a2, b2, c2, d2, e2, w14, 5);
219 R51(e1, a1, b1, c1, d1, w11, 11);
220 R52(e2, a2, b2, c2, d2, w0, 15);
221 R51(d1, e1, a1, b1, c1, w6, 8);
222 R52(d2, e2, a2, b2, c2, w3, 13);
223 R51(c1, d1, e1, a1, b1, w15, 5);
224 R52(c2, d2, e2, a2, b2, w9, 11);
225 R51(b1, c1, d1, e1, a1, w13, 6);
226 R52(b2, c2, d2, e2, a2, w11, 11);
227
228 uint32_t t = s[0];
229 s[0] = s[1] + c1 + d2;
230 s[1] = s[2] + d1 + e2;
231 s[2] = s[3] + e1 + a2;
232 s[3] = s[4] + a1 + b2;
233 s[4] = t + b1 + c2;
234 }
235
236 } // namespace ripemd160
237
238 } // namespace
239
240 ////// RIPEMD160
241
242 CRIPEMD160::CRIPEMD160()
243 {
244 ripemd160::Initialize(s);
245 }
246
247 CRIPEMD160& CRIPEMD160::Write(const unsigned char* data, size_t len)
248 {
249 const unsigned char* end = data + len;
250 size_t bufsize = bytes % 64;
251 if (bufsize && bufsize + len >= 64) {
252 // Fill the buffer, and process it.
253 memcpy(buf + bufsize, data, 64 - bufsize);
254 bytes += 64 - bufsize;
255 data += 64 - bufsize;
256 ripemd160::Transform(s, buf);
257 bufsize = 0;
258 }
259 while (end - data >= 64) {
260 // Process full chunks directly from the source.
261 ripemd160::Transform(s, data);
262 bytes += 64;
263 data += 64;
264 }
265 if (end > data) {
266 // Fill the buffer with what remains.
267 memcpy(buf + bufsize, data, end - data);
268 bytes += end - data;
269 }
270 return *this;
271 }
272
273 void CRIPEMD160::Finalize(unsigned char hash[OUTPUT_SIZE])
274 {
275 static const unsigned char pad[64] = {0x80};
276 unsigned char sizedesc[8];
277 WriteLE64(sizedesc, bytes << 3);
278 Write(pad, 1 + ((119 - (bytes % 64)) % 64));
279 Write(sizedesc, 8);
280 WriteLE32(hash, s[0]);
281 WriteLE32(hash + 4, s[1]);
282 WriteLE32(hash + 8, s[2]);
283 WriteLE32(hash + 12, s[3]);
284 WriteLE32(hash + 16, s[4]);
285 }
286
287 CRIPEMD160& CRIPEMD160::Reset()
288 {
289 bytes = 0;
290 ripemd160::Initialize(s);
291 return *this;
292 }
293