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c842261b AP |
1 | /* crypto/sha/sha256.c */ |
2 | /* ==================================================================== | |
63077bd4 AP |
3 | * Copyright (c) 2004 The OpenSSL Project. All rights reserved |
4 | * according to the OpenSSL license [found in ../../LICENSE]. | |
c842261b AP |
5 | * ==================================================================== |
6 | */ | |
165fca51 | 7 | #include <openssl/opensslconf.h> |
fbf96849 AP |
8 | #if !defined(OPENSSL_NO_SHA) && !defined(OPENSSL_NO_SHA256) |
9 | ||
c842261b AP |
10 | #include <stdlib.h> |
11 | #include <string.h> | |
12 | ||
c842261b AP |
13 | #include <openssl/crypto.h> |
14 | #include <openssl/sha.h> | |
15 | #include <openssl/opensslv.h> | |
16 | ||
03e389cf | 17 | __fips_constseg |
560b79cb | 18 | const char SHA256_version[]="SHA-256" OPENSSL_VERSION_PTEXT; |
c842261b AP |
19 | |
20 | int SHA224_Init (SHA256_CTX *c) | |
21 | { | |
c69ed6ea | 22 | memset (c,0,sizeof(*c)); |
c842261b AP |
23 | c->h[0]=0xc1059ed8UL; c->h[1]=0x367cd507UL; |
24 | c->h[2]=0x3070dd17UL; c->h[3]=0xf70e5939UL; | |
25 | c->h[4]=0xffc00b31UL; c->h[5]=0x68581511UL; | |
26 | c->h[6]=0x64f98fa7UL; c->h[7]=0xbefa4fa4UL; | |
c69ed6ea | 27 | c->md_len=SHA224_DIGEST_LENGTH; |
7997b13a | 28 | return 1; |
c842261b AP |
29 | } |
30 | ||
31 | int SHA256_Init (SHA256_CTX *c) | |
32 | { | |
c69ed6ea | 33 | memset (c,0,sizeof(*c)); |
c842261b AP |
34 | c->h[0]=0x6a09e667UL; c->h[1]=0xbb67ae85UL; |
35 | c->h[2]=0x3c6ef372UL; c->h[3]=0xa54ff53aUL; | |
36 | c->h[4]=0x510e527fUL; c->h[5]=0x9b05688cUL; | |
37 | c->h[6]=0x1f83d9abUL; c->h[7]=0x5be0cd19UL; | |
c69ed6ea | 38 | c->md_len=SHA256_DIGEST_LENGTH; |
7997b13a | 39 | return 1; |
c842261b AP |
40 | } |
41 | ||
42 | unsigned char *SHA224(const unsigned char *d, size_t n, unsigned char *md) | |
43 | { | |
44 | SHA256_CTX c; | |
7997b13a | 45 | static unsigned char m[SHA224_DIGEST_LENGTH]; |
c842261b | 46 | |
7997b13a | 47 | if (md == NULL) md=m; |
c842261b AP |
48 | SHA224_Init(&c); |
49 | SHA256_Update(&c,d,n); | |
7997b13a | 50 | SHA256_Final(md,&c); |
c842261b AP |
51 | OPENSSL_cleanse(&c,sizeof(c)); |
52 | return(md); | |
53 | } | |
54 | ||
55 | unsigned char *SHA256(const unsigned char *d, size_t n, unsigned char *md) | |
56 | { | |
57 | SHA256_CTX c; | |
58 | static unsigned char m[SHA256_DIGEST_LENGTH]; | |
59 | ||
60 | if (md == NULL) md=m; | |
61 | SHA256_Init(&c); | |
62 | SHA256_Update(&c,d,n); | |
63 | SHA256_Final(md,&c); | |
64 | OPENSSL_cleanse(&c,sizeof(c)); | |
65 | return(md); | |
66 | } | |
67 | ||
7997b13a AP |
68 | int SHA224_Update(SHA256_CTX *c, const void *data, size_t len) |
69 | { return SHA256_Update (c,data,len); } | |
70 | int SHA224_Final (unsigned char *md, SHA256_CTX *c) | |
71 | { return SHA256_Final (md,c); } | |
72 | ||
c842261b AP |
73 | #define DATA_ORDER_IS_BIG_ENDIAN |
74 | ||
75 | #define HASH_LONG SHA_LONG | |
c842261b AP |
76 | #define HASH_CTX SHA256_CTX |
77 | #define HASH_CBLOCK SHA_CBLOCK | |
7997b13a AP |
78 | /* |
79 | * Note that FIPS180-2 discusses "Truncation of the Hash Function Output." | |
80 | * default: case below covers for it. It's not clear however if it's | |
31e9b9b2 | 81 | * permitted to truncate to amount of bytes not divisible by 4. I bet not, |
7997b13a AP |
82 | * but if it is, then default: case shall be extended. For reference. |
83 | * Idea behind separate cases for pre-defined lenghts is to let the | |
84 | * compiler decide if it's appropriate to unroll small loops. | |
85 | */ | |
c842261b AP |
86 | #define HASH_MAKE_STRING(c,s) do { \ |
87 | unsigned long ll; \ | |
ad0e4396 | 88 | unsigned int nn; \ |
7997b13a AP |
89 | switch ((c)->md_len) \ |
90 | { case SHA224_DIGEST_LENGTH: \ | |
ad0e4396 DSH |
91 | for (nn=0;nn<SHA224_DIGEST_LENGTH/4;nn++) \ |
92 | { ll=(c)->h[nn]; HOST_l2c(ll,(s)); } \ | |
7997b13a AP |
93 | break; \ |
94 | case SHA256_DIGEST_LENGTH: \ | |
ad0e4396 DSH |
95 | for (nn=0;nn<SHA256_DIGEST_LENGTH/4;nn++) \ |
96 | { ll=(c)->h[nn]; HOST_l2c(ll,(s)); } \ | |
7997b13a AP |
97 | break; \ |
98 | default: \ | |
99 | if ((c)->md_len > SHA256_DIGEST_LENGTH) \ | |
100 | return 0; \ | |
ad0e4396 DSH |
101 | for (nn=0;nn<(c)->md_len/4;nn++) \ |
102 | { ll=(c)->h[nn]; HOST_l2c(ll,(s)); } \ | |
7997b13a AP |
103 | break; \ |
104 | } \ | |
c842261b AP |
105 | } while (0) |
106 | ||
107 | #define HASH_UPDATE SHA256_Update | |
108 | #define HASH_TRANSFORM SHA256_Transform | |
109 | #define HASH_FINAL SHA256_Final | |
c842261b | 110 | #define HASH_BLOCK_DATA_ORDER sha256_block_data_order |
c5f17d45 AP |
111 | #ifndef SHA256_ASM |
112 | static | |
113 | #endif | |
c842261b AP |
114 | void sha256_block_data_order (SHA256_CTX *ctx, const void *in, size_t num); |
115 | ||
116 | #include "md32_common.h" | |
117 | ||
c5f17d45 | 118 | #ifndef SHA256_ASM |
03e389cf | 119 | __fips_constseg |
c842261b AP |
120 | static const SHA_LONG K256[64] = { |
121 | 0x428a2f98UL,0x71374491UL,0xb5c0fbcfUL,0xe9b5dba5UL, | |
122 | 0x3956c25bUL,0x59f111f1UL,0x923f82a4UL,0xab1c5ed5UL, | |
123 | 0xd807aa98UL,0x12835b01UL,0x243185beUL,0x550c7dc3UL, | |
124 | 0x72be5d74UL,0x80deb1feUL,0x9bdc06a7UL,0xc19bf174UL, | |
125 | 0xe49b69c1UL,0xefbe4786UL,0x0fc19dc6UL,0x240ca1ccUL, | |
126 | 0x2de92c6fUL,0x4a7484aaUL,0x5cb0a9dcUL,0x76f988daUL, | |
127 | 0x983e5152UL,0xa831c66dUL,0xb00327c8UL,0xbf597fc7UL, | |
128 | 0xc6e00bf3UL,0xd5a79147UL,0x06ca6351UL,0x14292967UL, | |
129 | 0x27b70a85UL,0x2e1b2138UL,0x4d2c6dfcUL,0x53380d13UL, | |
130 | 0x650a7354UL,0x766a0abbUL,0x81c2c92eUL,0x92722c85UL, | |
131 | 0xa2bfe8a1UL,0xa81a664bUL,0xc24b8b70UL,0xc76c51a3UL, | |
132 | 0xd192e819UL,0xd6990624UL,0xf40e3585UL,0x106aa070UL, | |
133 | 0x19a4c116UL,0x1e376c08UL,0x2748774cUL,0x34b0bcb5UL, | |
134 | 0x391c0cb3UL,0x4ed8aa4aUL,0x5b9cca4fUL,0x682e6ff3UL, | |
135 | 0x748f82eeUL,0x78a5636fUL,0x84c87814UL,0x8cc70208UL, | |
136 | 0x90befffaUL,0xa4506cebUL,0xbef9a3f7UL,0xc67178f2UL }; | |
137 | ||
138 | /* | |
139 | * FIPS specification refers to right rotations, while our ROTATE macro | |
140 | * is left one. This is why you might notice that rotation coefficients | |
141 | * differ from those observed in FIPS document by 32-N... | |
142 | */ | |
143 | #define Sigma0(x) (ROTATE((x),30) ^ ROTATE((x),19) ^ ROTATE((x),10)) | |
144 | #define Sigma1(x) (ROTATE((x),26) ^ ROTATE((x),21) ^ ROTATE((x),7)) | |
145 | #define sigma0(x) (ROTATE((x),25) ^ ROTATE((x),14) ^ ((x)>>3)) | |
146 | #define sigma1(x) (ROTATE((x),15) ^ ROTATE((x),13) ^ ((x)>>10)) | |
147 | ||
148 | #define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z))) | |
149 | #define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z))) | |
150 | ||
151 | #ifdef OPENSSL_SMALL_FOOTPRINT | |
152 | ||
c5f17d45 | 153 | static void sha256_block_data_order (SHA256_CTX *ctx, const void *in, size_t num) |
c842261b AP |
154 | { |
155 | unsigned MD32_REG_T a,b,c,d,e,f,g,h,s0,s1,T1,T2; | |
c69ed6ea | 156 | SHA_LONG X[16],l; |
c842261b | 157 | int i; |
63077bd4 | 158 | const unsigned char *data=in; |
c842261b AP |
159 | |
160 | while (num--) { | |
161 | ||
162 | a = ctx->h[0]; b = ctx->h[1]; c = ctx->h[2]; d = ctx->h[3]; | |
163 | e = ctx->h[4]; f = ctx->h[5]; g = ctx->h[6]; h = ctx->h[7]; | |
164 | ||
c69ed6ea | 165 | for (i=0;i<16;i++) |
c842261b | 166 | { |
c69ed6ea AP |
167 | HOST_c2l(data,l); T1 = X[i] = l; |
168 | T1 += h + Sigma1(e) + Ch(e,f,g) + K256[i]; | |
169 | T2 = Sigma0(a) + Maj(a,b,c); | |
170 | h = g; g = f; f = e; e = d + T1; | |
171 | d = c; c = b; b = a; a = T1 + T2; | |
c842261b AP |
172 | } |
173 | ||
174 | for (;i<64;i++) | |
175 | { | |
176 | s0 = X[(i+1)&0x0f]; s0 = sigma0(s0); | |
177 | s1 = X[(i+14)&0x0f]; s1 = sigma1(s1); | |
178 | ||
179 | T1 = X[i&0xf] += s0 + s1 + X[(i+9)&0xf]; | |
180 | T1 += h + Sigma1(e) + Ch(e,f,g) + K256[i]; | |
181 | T2 = Sigma0(a) + Maj(a,b,c); | |
182 | h = g; g = f; f = e; e = d + T1; | |
183 | d = c; c = b; b = a; a = T1 + T2; | |
184 | } | |
185 | ||
186 | ctx->h[0] += a; ctx->h[1] += b; ctx->h[2] += c; ctx->h[3] += d; | |
187 | ctx->h[4] += e; ctx->h[5] += f; ctx->h[6] += g; ctx->h[7] += h; | |
188 | ||
189 | } | |
190 | } | |
191 | ||
192 | #else | |
193 | ||
194 | #define ROUND_00_15(i,a,b,c,d,e,f,g,h) do { \ | |
195 | T1 += h + Sigma1(e) + Ch(e,f,g) + K256[i]; \ | |
196 | h = Sigma0(a) + Maj(a,b,c); \ | |
197 | d += T1; h += T1; } while (0) | |
198 | ||
199 | #define ROUND_16_63(i,a,b,c,d,e,f,g,h,X) do { \ | |
200 | s0 = X[(i+1)&0x0f]; s0 = sigma0(s0); \ | |
201 | s1 = X[(i+14)&0x0f]; s1 = sigma1(s1); \ | |
63077bd4 | 202 | T1 = X[(i)&0x0f] += s0 + s1 + X[(i+9)&0x0f]; \ |
c842261b AP |
203 | ROUND_00_15(i,a,b,c,d,e,f,g,h); } while (0) |
204 | ||
c5f17d45 | 205 | static void sha256_block_data_order (SHA256_CTX *ctx, const void *in, size_t num) |
c842261b AP |
206 | { |
207 | unsigned MD32_REG_T a,b,c,d,e,f,g,h,s0,s1,T1; | |
208 | SHA_LONG X[16]; | |
209 | int i; | |
63077bd4 | 210 | const unsigned char *data=in; |
c69ed6ea | 211 | const union { long one; char little; } is_endian = {1}; |
c842261b AP |
212 | |
213 | while (num--) { | |
214 | ||
215 | a = ctx->h[0]; b = ctx->h[1]; c = ctx->h[2]; d = ctx->h[3]; | |
216 | e = ctx->h[4]; f = ctx->h[5]; g = ctx->h[6]; h = ctx->h[7]; | |
217 | ||
c69ed6ea | 218 | if (!is_endian.little && sizeof(SHA_LONG)==4 && ((size_t)in%4)==0) |
c842261b | 219 | { |
63077bd4 | 220 | const SHA_LONG *W=(const SHA_LONG *)data; |
c842261b AP |
221 | |
222 | T1 = X[0] = W[0]; ROUND_00_15(0,a,b,c,d,e,f,g,h); | |
223 | T1 = X[1] = W[1]; ROUND_00_15(1,h,a,b,c,d,e,f,g); | |
224 | T1 = X[2] = W[2]; ROUND_00_15(2,g,h,a,b,c,d,e,f); | |
225 | T1 = X[3] = W[3]; ROUND_00_15(3,f,g,h,a,b,c,d,e); | |
226 | T1 = X[4] = W[4]; ROUND_00_15(4,e,f,g,h,a,b,c,d); | |
227 | T1 = X[5] = W[5]; ROUND_00_15(5,d,e,f,g,h,a,b,c); | |
228 | T1 = X[6] = W[6]; ROUND_00_15(6,c,d,e,f,g,h,a,b); | |
229 | T1 = X[7] = W[7]; ROUND_00_15(7,b,c,d,e,f,g,h,a); | |
230 | T1 = X[8] = W[8]; ROUND_00_15(8,a,b,c,d,e,f,g,h); | |
231 | T1 = X[9] = W[9]; ROUND_00_15(9,h,a,b,c,d,e,f,g); | |
232 | T1 = X[10] = W[10]; ROUND_00_15(10,g,h,a,b,c,d,e,f); | |
233 | T1 = X[11] = W[11]; ROUND_00_15(11,f,g,h,a,b,c,d,e); | |
234 | T1 = X[12] = W[12]; ROUND_00_15(12,e,f,g,h,a,b,c,d); | |
235 | T1 = X[13] = W[13]; ROUND_00_15(13,d,e,f,g,h,a,b,c); | |
236 | T1 = X[14] = W[14]; ROUND_00_15(14,c,d,e,f,g,h,a,b); | |
237 | T1 = X[15] = W[15]; ROUND_00_15(15,b,c,d,e,f,g,h,a); | |
968c31bd AP |
238 | |
239 | data += SHA256_CBLOCK; | |
c842261b AP |
240 | } |
241 | else | |
242 | { | |
c842261b AP |
243 | SHA_LONG l; |
244 | ||
245 | HOST_c2l(data,l); T1 = X[0] = l; ROUND_00_15(0,a,b,c,d,e,f,g,h); | |
246 | HOST_c2l(data,l); T1 = X[1] = l; ROUND_00_15(1,h,a,b,c,d,e,f,g); | |
247 | HOST_c2l(data,l); T1 = X[2] = l; ROUND_00_15(2,g,h,a,b,c,d,e,f); | |
248 | HOST_c2l(data,l); T1 = X[3] = l; ROUND_00_15(3,f,g,h,a,b,c,d,e); | |
249 | HOST_c2l(data,l); T1 = X[4] = l; ROUND_00_15(4,e,f,g,h,a,b,c,d); | |
250 | HOST_c2l(data,l); T1 = X[5] = l; ROUND_00_15(5,d,e,f,g,h,a,b,c); | |
251 | HOST_c2l(data,l); T1 = X[6] = l; ROUND_00_15(6,c,d,e,f,g,h,a,b); | |
252 | HOST_c2l(data,l); T1 = X[7] = l; ROUND_00_15(7,b,c,d,e,f,g,h,a); | |
253 | HOST_c2l(data,l); T1 = X[8] = l; ROUND_00_15(8,a,b,c,d,e,f,g,h); | |
254 | HOST_c2l(data,l); T1 = X[9] = l; ROUND_00_15(9,h,a,b,c,d,e,f,g); | |
255 | HOST_c2l(data,l); T1 = X[10] = l; ROUND_00_15(10,g,h,a,b,c,d,e,f); | |
256 | HOST_c2l(data,l); T1 = X[11] = l; ROUND_00_15(11,f,g,h,a,b,c,d,e); | |
257 | HOST_c2l(data,l); T1 = X[12] = l; ROUND_00_15(12,e,f,g,h,a,b,c,d); | |
258 | HOST_c2l(data,l); T1 = X[13] = l; ROUND_00_15(13,d,e,f,g,h,a,b,c); | |
259 | HOST_c2l(data,l); T1 = X[14] = l; ROUND_00_15(14,c,d,e,f,g,h,a,b); | |
260 | HOST_c2l(data,l); T1 = X[15] = l; ROUND_00_15(15,b,c,d,e,f,g,h,a); | |
261 | } | |
262 | ||
263 | for (i=16;i<64;i+=8) | |
264 | { | |
265 | ROUND_16_63(i+0,a,b,c,d,e,f,g,h,X); | |
266 | ROUND_16_63(i+1,h,a,b,c,d,e,f,g,X); | |
267 | ROUND_16_63(i+2,g,h,a,b,c,d,e,f,X); | |
268 | ROUND_16_63(i+3,f,g,h,a,b,c,d,e,X); | |
269 | ROUND_16_63(i+4,e,f,g,h,a,b,c,d,X); | |
270 | ROUND_16_63(i+5,d,e,f,g,h,a,b,c,X); | |
271 | ROUND_16_63(i+6,c,d,e,f,g,h,a,b,X); | |
272 | ROUND_16_63(i+7,b,c,d,e,f,g,h,a,X); | |
273 | } | |
274 | ||
275 | ctx->h[0] += a; ctx->h[1] += b; ctx->h[2] += c; ctx->h[3] += d; | |
276 | ctx->h[4] += e; ctx->h[5] += f; ctx->h[6] += g; ctx->h[7] += h; | |
277 | ||
278 | } | |
279 | } | |
280 | ||
281 | #endif | |
859ceeeb | 282 | #endif /* SHA256_ASM */ |
c842261b | 283 | |
fbf96849 | 284 | #endif /* OPENSSL_NO_SHA256 */ |