2 ********************************************************************
3 * SHS 180-1 Reference Implementation (with unrolled loops) *
4 * Copyright 1995-6 by Paul C. Kocher. *
6 * This file is provided as-is, without warranty of any kind; *
7 * use at your own risk. This file may be copied and used, *
8 * even for commercial purposes, for free. For information, *
9 * updates, updates, or consulting help, send e-mail to the *
10 * author at pck@cryptography.com. *
12 * EXPORT STATUS: In informal discussions, the U.S. National *
13 * Security Agency has indicated to me that source code for *
14 * can be exported from the U.S. freely, but programs using *
15 * or incorporating this code may be restricted. Please make *
16 * sure you understand the applicable export regulations *
17 * before doing any work with cryptography. *
19 * For links to other cryptography source code, papers, etc. see *
20 * http://www.cryptography.com. *
21 ********************************************************************
26 static void shsCompress(SHS_CTX *ctx);
28 #define SHS_ROTL(X,n) (((X) << (n)) | ((X) >> (32-(n))))
29 #define SHS_F1(X,Y,Z) ((((Y)^(Z))&(X))^(Z))
30 #define SHS_F2(X,Y,Z) ((X)^(Y)^(Z))
31 #define SHS_F3(X,Y,Z) (((X)&(Y))|((Z)&((X)|(Y))))
32 #define SHS_F4(X,Y,Z) ((X)^(Y)^(Z))
36 * SHS: Initialize context
38 void shsInit(SHS_CTX *ctx) {
40 ctx->sizeHi = ctx->sizeLo = 0;
43 * Initialize H with constants from FIPS180-1.
45 ctx->H[0] = 0x67452301L;
46 ctx->H[1] = 0xefcdab89L;
47 ctx->H[2] = 0x98badcfeL;
48 ctx->H[3] = 0x10325476L;
49 ctx->H[4] = 0xc3d2e1f0L;
54 * SHS: Add data to context.
56 void shsUpdate(SHS_CTX *ctx, const unsigned char * dataIn, int len) {
58 * Read the data into W and process blocks as they get full
60 * NOTE: The shifts can be eliminated on big-endian machines, since
61 * the byte-to-word transformation can be done with a copy. In
62 * assembly language on 80486+ computers, the BSWAP instruction
66 ctx->sizeHi += (ctx->sizeLo < 8*len) + (len >> 29);
68 ctx->W[ctx->lenW / 4] <<= 8;
69 ctx->W[ctx->lenW / 4] |= *(dataIn++);
70 if (((++ctx->lenW) & 63) == 0) {
79 * SHS: Generate hash value from context
81 void shsFinal(SHS_CTX * ctx, unsigned char hashOut[20]) {
82 static unsigned char bulk_pad[64] = { 0x80,0,0,0,0,0,0,0,0,0,
83 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
84 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
85 unsigned char length_pad[8];
89 * Pad with a binary 1 (e.g. 0x80), then zeroes, then length
91 length_pad[0] = (unsigned char)((ctx->sizeHi >> 24) & 255);
92 length_pad[1] = (unsigned char)((ctx->sizeHi >> 16) & 255);
93 length_pad[2] = (unsigned char)((ctx->sizeHi >> 8) & 255);
94 length_pad[3] = (unsigned char)((ctx->sizeHi >> 0) & 255);
95 length_pad[4] = (unsigned char)((ctx->sizeLo >> 24) & 255);
96 length_pad[5] = (unsigned char)((ctx->sizeLo >> 16) & 255);
97 length_pad[6] = (unsigned char)((ctx->sizeLo >> 8) & 255);
98 length_pad[7] = (unsigned char)((ctx->sizeLo >> 0) & 255);
99 shsUpdate(ctx, bulk_pad, ((56+64) - ctx->lenW) & 63);
100 shsUpdate(ctx, length_pad, 8);
105 for (i = 0; i < 5; i++) {
106 *(hashOut++) = ((unsigned char)(ctx->H[i] >> 24)) & 255;
107 *(hashOut++) = ((unsigned char)(ctx->H[i] >> 16)) & 255;
108 *(hashOut++) = ((unsigned char)(ctx->H[i] >> 8)) & 255;
109 *(hashOut++) = ((unsigned char)(ctx->H[i] )) & 255;
113 * Re-initialize the context (also zeroizes contents)
120 * SHS: Hash a block in memory
122 void shsBlock(const unsigned char *dataIn, int len, unsigned char hashOut[20]) {
126 shsUpdate(&ctx, dataIn, len);
127 shsFinal(&ctx, hashOut);
132 * SHS: Compression function, unrolled.
134 static void shsCompress(SHS_CTX *ctx) {
136 register unsigned long A,B,C,D,E;
139 * This can be moved into the main code block below, but doing
140 * so can cause some compilers to run out of registers and resort
141 * to storing intermediates in RAM.
143 for (t = 16; t <= 79; t++)
145 SHS_ROTL(ctx->W[t-3] ^ ctx->W[t-8] ^ ctx->W[t-14] ^ ctx->W[t-16], 1);
153 E = SHS_ROTL(A,5)+SHS_F1(B,C,D)+E+ctx->W[ 0]+0x5a827999L; B=SHS_ROTL(B,30);
154 D = SHS_ROTL(E,5)+SHS_F1(A,B,C)+D+ctx->W[ 1]+0x5a827999L; A=SHS_ROTL(A,30);
155 C = SHS_ROTL(D,5)+SHS_F1(E,A,B)+C+ctx->W[ 2]+0x5a827999L; E=SHS_ROTL(E,30);
156 B = SHS_ROTL(C,5)+SHS_F1(D,E,A)+B+ctx->W[ 3]+0x5a827999L; D=SHS_ROTL(D,30);
157 A = SHS_ROTL(B,5)+SHS_F1(C,D,E)+A+ctx->W[ 4]+0x5a827999L; C=SHS_ROTL(C,30);
158 E = SHS_ROTL(A,5)+SHS_F1(B,C,D)+E+ctx->W[ 5]+0x5a827999L; B=SHS_ROTL(B,30);
159 D = SHS_ROTL(E,5)+SHS_F1(A,B,C)+D+ctx->W[ 6]+0x5a827999L; A=SHS_ROTL(A,30);
160 C = SHS_ROTL(D,5)+SHS_F1(E,A,B)+C+ctx->W[ 7]+0x5a827999L; E=SHS_ROTL(E,30);
161 B = SHS_ROTL(C,5)+SHS_F1(D,E,A)+B+ctx->W[ 8]+0x5a827999L; D=SHS_ROTL(D,30);
162 A = SHS_ROTL(B,5)+SHS_F1(C,D,E)+A+ctx->W[ 9]+0x5a827999L; C=SHS_ROTL(C,30);
163 E = SHS_ROTL(A,5)+SHS_F1(B,C,D)+E+ctx->W[10]+0x5a827999L; B=SHS_ROTL(B,30);
164 D = SHS_ROTL(E,5)+SHS_F1(A,B,C)+D+ctx->W[11]+0x5a827999L; A=SHS_ROTL(A,30);
165 C = SHS_ROTL(D,5)+SHS_F1(E,A,B)+C+ctx->W[12]+0x5a827999L; E=SHS_ROTL(E,30);
166 B = SHS_ROTL(C,5)+SHS_F1(D,E,A)+B+ctx->W[13]+0x5a827999L; D=SHS_ROTL(D,30);
167 A = SHS_ROTL(B,5)+SHS_F1(C,D,E)+A+ctx->W[14]+0x5a827999L; C=SHS_ROTL(C,30);
168 E = SHS_ROTL(A,5)+SHS_F1(B,C,D)+E+ctx->W[15]+0x5a827999L; B=SHS_ROTL(B,30);
169 D = SHS_ROTL(E,5)+SHS_F1(A,B,C)+D+ctx->W[16]+0x5a827999L; A=SHS_ROTL(A,30);
170 C = SHS_ROTL(D,5)+SHS_F1(E,A,B)+C+ctx->W[17]+0x5a827999L; E=SHS_ROTL(E,30);
171 B = SHS_ROTL(C,5)+SHS_F1(D,E,A)+B+ctx->W[18]+0x5a827999L; D=SHS_ROTL(D,30);
172 A = SHS_ROTL(B,5)+SHS_F1(C,D,E)+A+ctx->W[19]+0x5a827999L; C=SHS_ROTL(C,30);
174 E = SHS_ROTL(A,5)+SHS_F2(B,C,D)+E+ctx->W[20]+0x6ed9eba1L; B=SHS_ROTL(B,30);
175 D = SHS_ROTL(E,5)+SHS_F2(A,B,C)+D+ctx->W[21]+0x6ed9eba1L; A=SHS_ROTL(A,30);
176 C = SHS_ROTL(D,5)+SHS_F2(E,A,B)+C+ctx->W[22]+0x6ed9eba1L; E=SHS_ROTL(E,30);
177 B = SHS_ROTL(C,5)+SHS_F2(D,E,A)+B+ctx->W[23]+0x6ed9eba1L; D=SHS_ROTL(D,30);
178 A = SHS_ROTL(B,5)+SHS_F2(C,D,E)+A+ctx->W[24]+0x6ed9eba1L; C=SHS_ROTL(C,30);
179 E = SHS_ROTL(A,5)+SHS_F2(B,C,D)+E+ctx->W[25]+0x6ed9eba1L; B=SHS_ROTL(B,30);
180 D = SHS_ROTL(E,5)+SHS_F2(A,B,C)+D+ctx->W[26]+0x6ed9eba1L; A=SHS_ROTL(A,30);
181 C = SHS_ROTL(D,5)+SHS_F2(E,A,B)+C+ctx->W[27]+0x6ed9eba1L; E=SHS_ROTL(E,30);
182 B = SHS_ROTL(C,5)+SHS_F2(D,E,A)+B+ctx->W[28]+0x6ed9eba1L; D=SHS_ROTL(D,30);
183 A = SHS_ROTL(B,5)+SHS_F2(C,D,E)+A+ctx->W[29]+0x6ed9eba1L; C=SHS_ROTL(C,30);
184 E = SHS_ROTL(A,5)+SHS_F2(B,C,D)+E+ctx->W[30]+0x6ed9eba1L; B=SHS_ROTL(B,30);
185 D = SHS_ROTL(E,5)+SHS_F2(A,B,C)+D+ctx->W[31]+0x6ed9eba1L; A=SHS_ROTL(A,30);
186 C = SHS_ROTL(D,5)+SHS_F2(E,A,B)+C+ctx->W[32]+0x6ed9eba1L; E=SHS_ROTL(E,30);
187 B = SHS_ROTL(C,5)+SHS_F2(D,E,A)+B+ctx->W[33]+0x6ed9eba1L; D=SHS_ROTL(D,30);
188 A = SHS_ROTL(B,5)+SHS_F2(C,D,E)+A+ctx->W[34]+0x6ed9eba1L; C=SHS_ROTL(C,30);
189 E = SHS_ROTL(A,5)+SHS_F2(B,C,D)+E+ctx->W[35]+0x6ed9eba1L; B=SHS_ROTL(B,30);
190 D = SHS_ROTL(E,5)+SHS_F2(A,B,C)+D+ctx->W[36]+0x6ed9eba1L; A=SHS_ROTL(A,30);
191 C = SHS_ROTL(D,5)+SHS_F2(E,A,B)+C+ctx->W[37]+0x6ed9eba1L; E=SHS_ROTL(E,30);
192 B = SHS_ROTL(C,5)+SHS_F2(D,E,A)+B+ctx->W[38]+0x6ed9eba1L; D=SHS_ROTL(D,30);
193 A = SHS_ROTL(B,5)+SHS_F2(C,D,E)+A+ctx->W[39]+0x6ed9eba1L; C=SHS_ROTL(C,30);
195 E = SHS_ROTL(A,5)+SHS_F3(B,C,D)+E+ctx->W[40]+0x8f1bbcdcL; B=SHS_ROTL(B,30);
196 D = SHS_ROTL(E,5)+SHS_F3(A,B,C)+D+ctx->W[41]+0x8f1bbcdcL; A=SHS_ROTL(A,30);
197 C = SHS_ROTL(D,5)+SHS_F3(E,A,B)+C+ctx->W[42]+0x8f1bbcdcL; E=SHS_ROTL(E,30);
198 B = SHS_ROTL(C,5)+SHS_F3(D,E,A)+B+ctx->W[43]+0x8f1bbcdcL; D=SHS_ROTL(D,30);
199 A = SHS_ROTL(B,5)+SHS_F3(C,D,E)+A+ctx->W[44]+0x8f1bbcdcL; C=SHS_ROTL(C,30);
200 E = SHS_ROTL(A,5)+SHS_F3(B,C,D)+E+ctx->W[45]+0x8f1bbcdcL; B=SHS_ROTL(B,30);
201 D = SHS_ROTL(E,5)+SHS_F3(A,B,C)+D+ctx->W[46]+0x8f1bbcdcL; A=SHS_ROTL(A,30);
202 C = SHS_ROTL(D,5)+SHS_F3(E,A,B)+C+ctx->W[47]+0x8f1bbcdcL; E=SHS_ROTL(E,30);
203 B = SHS_ROTL(C,5)+SHS_F3(D,E,A)+B+ctx->W[48]+0x8f1bbcdcL; D=SHS_ROTL(D,30);
204 A = SHS_ROTL(B,5)+SHS_F3(C,D,E)+A+ctx->W[49]+0x8f1bbcdcL; C=SHS_ROTL(C,30);
205 E = SHS_ROTL(A,5)+SHS_F3(B,C,D)+E+ctx->W[50]+0x8f1bbcdcL; B=SHS_ROTL(B,30);
206 D = SHS_ROTL(E,5)+SHS_F3(A,B,C)+D+ctx->W[51]+0x8f1bbcdcL; A=SHS_ROTL(A,30);
207 C = SHS_ROTL(D,5)+SHS_F3(E,A,B)+C+ctx->W[52]+0x8f1bbcdcL; E=SHS_ROTL(E,30);
208 B = SHS_ROTL(C,5)+SHS_F3(D,E,A)+B+ctx->W[53]+0x8f1bbcdcL; D=SHS_ROTL(D,30);
209 A = SHS_ROTL(B,5)+SHS_F3(C,D,E)+A+ctx->W[54]+0x8f1bbcdcL; C=SHS_ROTL(C,30);
210 E = SHS_ROTL(A,5)+SHS_F3(B,C,D)+E+ctx->W[55]+0x8f1bbcdcL; B=SHS_ROTL(B,30);
211 D = SHS_ROTL(E,5)+SHS_F3(A,B,C)+D+ctx->W[56]+0x8f1bbcdcL; A=SHS_ROTL(A,30);
212 C = SHS_ROTL(D,5)+SHS_F3(E,A,B)+C+ctx->W[57]+0x8f1bbcdcL; E=SHS_ROTL(E,30);
213 B = SHS_ROTL(C,5)+SHS_F3(D,E,A)+B+ctx->W[58]+0x8f1bbcdcL; D=SHS_ROTL(D,30);
214 A = SHS_ROTL(B,5)+SHS_F3(C,D,E)+A+ctx->W[59]+0x8f1bbcdcL; C=SHS_ROTL(C,30);
216 E = SHS_ROTL(A,5)+SHS_F4(B,C,D)+E+ctx->W[60]+0xca62c1d6L; B=SHS_ROTL(B,30);
217 D = SHS_ROTL(E,5)+SHS_F4(A,B,C)+D+ctx->W[61]+0xca62c1d6L; A=SHS_ROTL(A,30);
218 C = SHS_ROTL(D,5)+SHS_F4(E,A,B)+C+ctx->W[62]+0xca62c1d6L; E=SHS_ROTL(E,30);
219 B = SHS_ROTL(C,5)+SHS_F4(D,E,A)+B+ctx->W[63]+0xca62c1d6L; D=SHS_ROTL(D,30);
220 A = SHS_ROTL(B,5)+SHS_F4(C,D,E)+A+ctx->W[64]+0xca62c1d6L; C=SHS_ROTL(C,30);
221 E = SHS_ROTL(A,5)+SHS_F4(B,C,D)+E+ctx->W[65]+0xca62c1d6L; B=SHS_ROTL(B,30);
222 D = SHS_ROTL(E,5)+SHS_F4(A,B,C)+D+ctx->W[66]+0xca62c1d6L; A=SHS_ROTL(A,30);
223 C = SHS_ROTL(D,5)+SHS_F4(E,A,B)+C+ctx->W[67]+0xca62c1d6L; E=SHS_ROTL(E,30);
224 B = SHS_ROTL(C,5)+SHS_F4(D,E,A)+B+ctx->W[68]+0xca62c1d6L; D=SHS_ROTL(D,30);
225 A = SHS_ROTL(B,5)+SHS_F4(C,D,E)+A+ctx->W[69]+0xca62c1d6L; C=SHS_ROTL(C,30);
226 E = SHS_ROTL(A,5)+SHS_F4(B,C,D)+E+ctx->W[70]+0xca62c1d6L; B=SHS_ROTL(B,30);
227 D = SHS_ROTL(E,5)+SHS_F4(A,B,C)+D+ctx->W[71]+0xca62c1d6L; A=SHS_ROTL(A,30);
228 C = SHS_ROTL(D,5)+SHS_F4(E,A,B)+C+ctx->W[72]+0xca62c1d6L; E=SHS_ROTL(E,30);
229 B = SHS_ROTL(C,5)+SHS_F4(D,E,A)+B+ctx->W[73]+0xca62c1d6L; D=SHS_ROTL(D,30);
230 A = SHS_ROTL(B,5)+SHS_F4(C,D,E)+A+ctx->W[74]+0xca62c1d6L; C=SHS_ROTL(C,30);
231 E = SHS_ROTL(A,5)+SHS_F4(B,C,D)+E+ctx->W[75]+0xca62c1d6L; B=SHS_ROTL(B,30);
232 D = SHS_ROTL(E,5)+SHS_F4(A,B,C)+D+ctx->W[76]+0xca62c1d6L; A=SHS_ROTL(A,30);
233 C = SHS_ROTL(D,5)+SHS_F4(E,A,B)+C+ctx->W[77]+0xca62c1d6L; E=SHS_ROTL(E,30);
234 B = SHS_ROTL(C,5)+SHS_F4(D,E,A)+B+ctx->W[78]+0xca62c1d6L; D=SHS_ROTL(D,30);
235 A = SHS_ROTL(B,5)+SHS_F4(C,D,E)+A+ctx->W[79]+0xca62c1d6L; C=SHS_ROTL(C,30);