Botan  1.10.9
sha2_32.cpp
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1 /*
2 * SHA-{224,256}
3 * (C) 1999-2010 Jack Lloyd
4 * 2007 FlexSecure GmbH
5 *
6 * Distributed under the terms of the Botan license
7 */
8 
9 #include <botan/sha2_32.h>
10 #include <botan/loadstor.h>
11 #include <botan/rotate.h>
12 
13 namespace Botan {
14 
15 namespace {
16 
17 namespace SHA2_32 {
18 
19 /*
20 * SHA-256 Rho Function
21 */
22 inline u32bit rho(u32bit X, u32bit rot1, u32bit rot2, u32bit rot3)
23  {
24  return (rotate_right(X, rot1) ^ rotate_right(X, rot2) ^
25  rotate_right(X, rot3));
26  }
27 
28 /*
29 * SHA-256 Sigma Function
30 */
31 inline u32bit sigma(u32bit X, u32bit rot1, u32bit rot2, u32bit shift)
32  {
33  return (rotate_right(X, rot1) ^ rotate_right(X, rot2) ^ (X >> shift));
34  }
35 
36 /*
37 * SHA-256 F1 Function
38 *
39 * Use a macro as many compilers won't inline a function this big,
40 * even though it is much faster if inlined.
41 */
42 #define SHA2_32_F(A, B, C, D, E, F, G, H, M1, M2, M3, M4, magic) \
43  do { \
44  H += magic + rho(E, 6, 11, 25) + ((E & F) ^ (~E & G)) + M1; \
45  D += H; \
46  H += rho(A, 2, 13, 22) + ((A & B) | ((A | B) & C)); \
47  M1 += sigma(M2, 17, 19, 10) + M3 + sigma(M4, 7, 18, 3); \
48  } while(0);
49 
50 /*
51 * SHA-224 / SHA-256 compression function
52 */
53 void compress(MemoryRegion<u32bit>& digest,
54  const byte input[], size_t blocks)
55  {
56  u32bit A = digest[0], B = digest[1], C = digest[2],
57  D = digest[3], E = digest[4], F = digest[5],
58  G = digest[6], H = digest[7];
59 
60  for(size_t i = 0; i != blocks; ++i)
61  {
62  u32bit W00 = load_be<u32bit>(input, 0);
63  u32bit W01 = load_be<u32bit>(input, 1);
64  u32bit W02 = load_be<u32bit>(input, 2);
65  u32bit W03 = load_be<u32bit>(input, 3);
66  u32bit W04 = load_be<u32bit>(input, 4);
67  u32bit W05 = load_be<u32bit>(input, 5);
68  u32bit W06 = load_be<u32bit>(input, 6);
69  u32bit W07 = load_be<u32bit>(input, 7);
70  u32bit W08 = load_be<u32bit>(input, 8);
71  u32bit W09 = load_be<u32bit>(input, 9);
72  u32bit W10 = load_be<u32bit>(input, 10);
73  u32bit W11 = load_be<u32bit>(input, 11);
74  u32bit W12 = load_be<u32bit>(input, 12);
75  u32bit W13 = load_be<u32bit>(input, 13);
76  u32bit W14 = load_be<u32bit>(input, 14);
77  u32bit W15 = load_be<u32bit>(input, 15);
78 
79  SHA2_32_F(A, B, C, D, E, F, G, H, W00, W14, W09, W01, 0x428A2F98);
80  SHA2_32_F(H, A, B, C, D, E, F, G, W01, W15, W10, W02, 0x71374491);
81  SHA2_32_F(G, H, A, B, C, D, E, F, W02, W00, W11, W03, 0xB5C0FBCF);
82  SHA2_32_F(F, G, H, A, B, C, D, E, W03, W01, W12, W04, 0xE9B5DBA5);
83  SHA2_32_F(E, F, G, H, A, B, C, D, W04, W02, W13, W05, 0x3956C25B);
84  SHA2_32_F(D, E, F, G, H, A, B, C, W05, W03, W14, W06, 0x59F111F1);
85  SHA2_32_F(C, D, E, F, G, H, A, B, W06, W04, W15, W07, 0x923F82A4);
86  SHA2_32_F(B, C, D, E, F, G, H, A, W07, W05, W00, W08, 0xAB1C5ED5);
87  SHA2_32_F(A, B, C, D, E, F, G, H, W08, W06, W01, W09, 0xD807AA98);
88  SHA2_32_F(H, A, B, C, D, E, F, G, W09, W07, W02, W10, 0x12835B01);
89  SHA2_32_F(G, H, A, B, C, D, E, F, W10, W08, W03, W11, 0x243185BE);
90  SHA2_32_F(F, G, H, A, B, C, D, E, W11, W09, W04, W12, 0x550C7DC3);
91  SHA2_32_F(E, F, G, H, A, B, C, D, W12, W10, W05, W13, 0x72BE5D74);
92  SHA2_32_F(D, E, F, G, H, A, B, C, W13, W11, W06, W14, 0x80DEB1FE);
93  SHA2_32_F(C, D, E, F, G, H, A, B, W14, W12, W07, W15, 0x9BDC06A7);
94  SHA2_32_F(B, C, D, E, F, G, H, A, W15, W13, W08, W00, 0xC19BF174);
95  SHA2_32_F(A, B, C, D, E, F, G, H, W00, W14, W09, W01, 0xE49B69C1);
96  SHA2_32_F(H, A, B, C, D, E, F, G, W01, W15, W10, W02, 0xEFBE4786);
97  SHA2_32_F(G, H, A, B, C, D, E, F, W02, W00, W11, W03, 0x0FC19DC6);
98  SHA2_32_F(F, G, H, A, B, C, D, E, W03, W01, W12, W04, 0x240CA1CC);
99  SHA2_32_F(E, F, G, H, A, B, C, D, W04, W02, W13, W05, 0x2DE92C6F);
100  SHA2_32_F(D, E, F, G, H, A, B, C, W05, W03, W14, W06, 0x4A7484AA);
101  SHA2_32_F(C, D, E, F, G, H, A, B, W06, W04, W15, W07, 0x5CB0A9DC);
102  SHA2_32_F(B, C, D, E, F, G, H, A, W07, W05, W00, W08, 0x76F988DA);
103  SHA2_32_F(A, B, C, D, E, F, G, H, W08, W06, W01, W09, 0x983E5152);
104  SHA2_32_F(H, A, B, C, D, E, F, G, W09, W07, W02, W10, 0xA831C66D);
105  SHA2_32_F(G, H, A, B, C, D, E, F, W10, W08, W03, W11, 0xB00327C8);
106  SHA2_32_F(F, G, H, A, B, C, D, E, W11, W09, W04, W12, 0xBF597FC7);
107  SHA2_32_F(E, F, G, H, A, B, C, D, W12, W10, W05, W13, 0xC6E00BF3);
108  SHA2_32_F(D, E, F, G, H, A, B, C, W13, W11, W06, W14, 0xD5A79147);
109  SHA2_32_F(C, D, E, F, G, H, A, B, W14, W12, W07, W15, 0x06CA6351);
110  SHA2_32_F(B, C, D, E, F, G, H, A, W15, W13, W08, W00, 0x14292967);
111  SHA2_32_F(A, B, C, D, E, F, G, H, W00, W14, W09, W01, 0x27B70A85);
112  SHA2_32_F(H, A, B, C, D, E, F, G, W01, W15, W10, W02, 0x2E1B2138);
113  SHA2_32_F(G, H, A, B, C, D, E, F, W02, W00, W11, W03, 0x4D2C6DFC);
114  SHA2_32_F(F, G, H, A, B, C, D, E, W03, W01, W12, W04, 0x53380D13);
115  SHA2_32_F(E, F, G, H, A, B, C, D, W04, W02, W13, W05, 0x650A7354);
116  SHA2_32_F(D, E, F, G, H, A, B, C, W05, W03, W14, W06, 0x766A0ABB);
117  SHA2_32_F(C, D, E, F, G, H, A, B, W06, W04, W15, W07, 0x81C2C92E);
118  SHA2_32_F(B, C, D, E, F, G, H, A, W07, W05, W00, W08, 0x92722C85);
119  SHA2_32_F(A, B, C, D, E, F, G, H, W08, W06, W01, W09, 0xA2BFE8A1);
120  SHA2_32_F(H, A, B, C, D, E, F, G, W09, W07, W02, W10, 0xA81A664B);
121  SHA2_32_F(G, H, A, B, C, D, E, F, W10, W08, W03, W11, 0xC24B8B70);
122  SHA2_32_F(F, G, H, A, B, C, D, E, W11, W09, W04, W12, 0xC76C51A3);
123  SHA2_32_F(E, F, G, H, A, B, C, D, W12, W10, W05, W13, 0xD192E819);
124  SHA2_32_F(D, E, F, G, H, A, B, C, W13, W11, W06, W14, 0xD6990624);
125  SHA2_32_F(C, D, E, F, G, H, A, B, W14, W12, W07, W15, 0xF40E3585);
126  SHA2_32_F(B, C, D, E, F, G, H, A, W15, W13, W08, W00, 0x106AA070);
127  SHA2_32_F(A, B, C, D, E, F, G, H, W00, W14, W09, W01, 0x19A4C116);
128  SHA2_32_F(H, A, B, C, D, E, F, G, W01, W15, W10, W02, 0x1E376C08);
129  SHA2_32_F(G, H, A, B, C, D, E, F, W02, W00, W11, W03, 0x2748774C);
130  SHA2_32_F(F, G, H, A, B, C, D, E, W03, W01, W12, W04, 0x34B0BCB5);
131  SHA2_32_F(E, F, G, H, A, B, C, D, W04, W02, W13, W05, 0x391C0CB3);
132  SHA2_32_F(D, E, F, G, H, A, B, C, W05, W03, W14, W06, 0x4ED8AA4A);
133  SHA2_32_F(C, D, E, F, G, H, A, B, W06, W04, W15, W07, 0x5B9CCA4F);
134  SHA2_32_F(B, C, D, E, F, G, H, A, W07, W05, W00, W08, 0x682E6FF3);
135  SHA2_32_F(A, B, C, D, E, F, G, H, W08, W06, W01, W09, 0x748F82EE);
136  SHA2_32_F(H, A, B, C, D, E, F, G, W09, W07, W02, W10, 0x78A5636F);
137  SHA2_32_F(G, H, A, B, C, D, E, F, W10, W08, W03, W11, 0x84C87814);
138  SHA2_32_F(F, G, H, A, B, C, D, E, W11, W09, W04, W12, 0x8CC70208);
139  SHA2_32_F(E, F, G, H, A, B, C, D, W12, W10, W05, W13, 0x90BEFFFA);
140  SHA2_32_F(D, E, F, G, H, A, B, C, W13, W11, W06, W14, 0xA4506CEB);
141  SHA2_32_F(C, D, E, F, G, H, A, B, W14, W12, W07, W15, 0xBEF9A3F7);
142  SHA2_32_F(B, C, D, E, F, G, H, A, W15, W13, W08, W00, 0xC67178F2);
143 
144  A = (digest[0] += A);
145  B = (digest[1] += B);
146  C = (digest[2] += C);
147  D = (digest[3] += D);
148  E = (digest[4] += E);
149  F = (digest[5] += F);
150  G = (digest[6] += G);
151  H = (digest[7] += H);
152 
153  input += 64;
154  }
155  }
156 
157 }
158 
159 }
160 
161 /*
162 * SHA-224 compression function
163 */
164 void SHA_224::compress_n(const byte input[], size_t blocks)
165  {
166  SHA2_32::compress(digest, input, blocks);
167  }
168 
169 /*
170 * Copy out the digest
171 */
172 void SHA_224::copy_out(byte output[])
173  {
174  for(size_t i = 0; i != output_length(); i += 4)
175  store_be(digest[i/4], output + i);
176  }
177 
178 /*
179 * Clear memory of sensitive data
180 */
182  {
184  digest[0] = 0xC1059ED8;
185  digest[1] = 0x367CD507;
186  digest[2] = 0x3070DD17;
187  digest[3] = 0xF70E5939;
188  digest[4] = 0xFFC00B31;
189  digest[5] = 0x68581511;
190  digest[6] = 0x64F98FA7;
191  digest[7] = 0xBEFA4FA4;
192  }
193 
194 /*
195 * SHA-256 compression function
196 */
197 void SHA_256::compress_n(const byte input[], size_t blocks)
198  {
199  SHA2_32::compress(digest, input, blocks);
200  }
201 
202 /*
203 * Copy out the digest
204 */
205 void SHA_256::copy_out(byte output[])
206  {
207  for(size_t i = 0; i != output_length(); i += 4)
208  store_be(digest[i/4], output + i);
209  }
210 
211 /*
212 * Clear memory of sensitive data
213 */
215  {
217  digest[0] = 0x6A09E667;
218  digest[1] = 0xBB67AE85;
219  digest[2] = 0x3C6EF372;
220  digest[3] = 0xA54FF53A;
221  digest[4] = 0x510E527F;
222  digest[5] = 0x9B05688C;
223  digest[6] = 0x1F83D9AB;
224  digest[7] = 0x5BE0CD19;
225  }
226 
227 }
void clear()
Definition: sha2_32.cpp:181
unsigned char byte
Definition: types.h:22
size_t output_length() const
Definition: sha2_32.h:23
size_t output_length() const
Definition: sha2_32.h:44
T rotate_right(T input, size_t rot)
Definition: rotate.h:34
u32bit load_be< u32bit >(const byte in[], size_t off)
Definition: loadstor.h:166
void store_be(u16bit in, byte out[2])
Definition: loadstor.h:412
void clear()
Definition: sha2_32.cpp:214
unsigned int u32bit
Definition: types.h:32
#define SHA2_32_F(A, B, C, D, E, F, G, H, M1, M2, M3, M4, magic)
Definition: sha2_32.cpp:42