summaryrefslogtreecommitdiff
path: root/cleopatre/application/libspid/src/openssl_sha256.c
blob: 841d7026b173e05c2835734a5a1f03fcd726a2bb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
/* crypto/sha/sha256.c */
/* ====================================================================
 * Copyright (c) 2004 The OpenSSL Project.  All rights reserved
 * according to the OpenSSL license [found in ../../LICENSE].
 * ====================================================================
 */
#include <stdlib.h>
#include <string.h>
#include "openssl_sha256.h"

void SHA256_Init (SHA256_CTX *c)
{
    c->h[0]=0x6a09e667UL;	c->h[1]=0xbb67ae85UL;
    c->h[2]=0x3c6ef372UL;	c->h[3]=0xa54ff53aUL;
    c->h[4]=0x510e527fUL;	c->h[5]=0x9b05688cUL;
    c->h[6]=0x1f83d9abUL;	c->h[7]=0x5be0cd19UL;
    c->Nl=0;	c->Nh=0;
    c->num=0;	c->md_len=SHA256_DIGEST_LENGTH;
}

unsigned char *SHA256(const unsigned char *d, size_t n, unsigned char *md)
	{
	SHA256_CTX c;
	static unsigned char m[SHA256_DIGEST_LENGTH];

	if (md == NULL) md=m;
	SHA256_Init(&c);
	SHA256_Update(&c,d,n);
	SHA256_Final(md,&c);
	return(md);
	}

#define	DATA_ORDER_IS_BIG_ENDIAN

#define	HASH_LONG		SHA_LONG
#define	HASH_CTX		SHA256_CTX
#define	HASH_CBLOCK		SHA_CBLOCK
/*
 * Note that FIPS180-2 discusses "Truncation of the Hash Function Output."
 * default: case below covers for it. It's not clear however if it's
 * permitted to truncate to amount of bytes not divisible by 4. I bet not,
 * but if it is, then default: case shall be extended. For reference.
 * Idea behind separate cases for pre-defined lenghts is to let the
 * compiler decide if it's appropriate to unroll small loops.
 */
#define	HASH_MAKE_STRING(c,s)	do {	\
	unsigned long ll;		\
	unsigned int  xn;		\
	switch ((c)->md_len)		\
	{   case SHA256_DIGEST_LENGTH:	\
		for (xn=0;xn<SHA256_DIGEST_LENGTH/4;xn++)	\
		{   ll=(c)->h[xn]; HOST_l2c(ll,(s));   }	\
		break;			\
	    default:			\
		if ((c)->md_len > SHA256_DIGEST_LENGTH)	\
		    return 0;				\
		for (xn=0;xn<(c)->md_len/4;xn++)		\
		{   ll=(c)->h[xn]; HOST_l2c(ll,(s));   }	\
		break;			\
	}				\
	} while (0)

#define	HASH_UPDATE		SHA256_Update
#define	HASH_TRANSFORM		SHA256_Transform
#define	HASH_FINAL		SHA256_Final
#define	HASH_BLOCK_DATA_ORDER	sha256_block_data_order
#ifndef SHA256_ASM
static
#endif
void sha256_block_data_order (SHA256_CTX *ctx, const void *in, size_t num);

#include "openssl_md32_common.h"

#ifndef SHA256_ASM
static const SHA_LONG K256[64] = {
	0x428a2f98UL,0x71374491UL,0xb5c0fbcfUL,0xe9b5dba5UL,
	0x3956c25bUL,0x59f111f1UL,0x923f82a4UL,0xab1c5ed5UL,
	0xd807aa98UL,0x12835b01UL,0x243185beUL,0x550c7dc3UL,
	0x72be5d74UL,0x80deb1feUL,0x9bdc06a7UL,0xc19bf174UL,
	0xe49b69c1UL,0xefbe4786UL,0x0fc19dc6UL,0x240ca1ccUL,
	0x2de92c6fUL,0x4a7484aaUL,0x5cb0a9dcUL,0x76f988daUL,
	0x983e5152UL,0xa831c66dUL,0xb00327c8UL,0xbf597fc7UL,
	0xc6e00bf3UL,0xd5a79147UL,0x06ca6351UL,0x14292967UL,
	0x27b70a85UL,0x2e1b2138UL,0x4d2c6dfcUL,0x53380d13UL,
	0x650a7354UL,0x766a0abbUL,0x81c2c92eUL,0x92722c85UL,
	0xa2bfe8a1UL,0xa81a664bUL,0xc24b8b70UL,0xc76c51a3UL,
	0xd192e819UL,0xd6990624UL,0xf40e3585UL,0x106aa070UL,
	0x19a4c116UL,0x1e376c08UL,0x2748774cUL,0x34b0bcb5UL,
	0x391c0cb3UL,0x4ed8aa4aUL,0x5b9cca4fUL,0x682e6ff3UL,
	0x748f82eeUL,0x78a5636fUL,0x84c87814UL,0x8cc70208UL,
	0x90befffaUL,0xa4506cebUL,0xbef9a3f7UL,0xc67178f2UL };

/*
 * FIPS specification refers to right rotations, while our ROTATE macro
 * is left one. This is why you might notice that rotation coefficients
 * differ from those observed in FIPS document by 32-N...
 */
#define Sigma0(x)	(ROTATE((x),30) ^ ROTATE((x),19) ^ ROTATE((x),10))
#define Sigma1(x)	(ROTATE((x),26) ^ ROTATE((x),21) ^ ROTATE((x),7))
#define sigma0(x)	(ROTATE((x),25) ^ ROTATE((x),14) ^ ((x)>>3))
#define sigma1(x)	(ROTATE((x),15) ^ ROTATE((x),13) ^ ((x)>>10))

#define Ch(x,y,z)	(((x) & (y)) ^ ((~(x)) & (z)))
#define Maj(x,y,z)	(((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))

#define OPENSSL_SMALL_FOOTPRINT
#ifdef OPENSSL_SMALL_FOOTPRINT

static void sha256_block_data_order (SHA256_CTX *ctx, const void *in, size_t num)
	{
	unsigned MD32_REG_T a,b,c,d,e,f,g,h,s0,s1,T1,T2;
	SHA_LONG	X[16],l;
	int i;
	const unsigned char *data=in;

			while (num--) {

	a = ctx->h[0];	b = ctx->h[1];	c = ctx->h[2];	d = ctx->h[3];
	e = ctx->h[4];	f = ctx->h[5];	g = ctx->h[6];	h = ctx->h[7];

	for (i=0;i<16;i++)
		{
		HOST_c2l(data,l); T1 = X[i] = l;
		T1 += h + Sigma1(e) + Ch(e,f,g) + K256[i];
		T2 = Sigma0(a) + Maj(a,b,c);
		h = g;	g = f;	f = e;	e = d + T1;
		d = c;	c = b;	b = a;	a = T1 + T2;
		}

	for (;i<64;i++)
		{
		s0 = X[(i+1)&0x0f];	s0 = sigma0(s0);
		s1 = X[(i+14)&0x0f];	s1 = sigma1(s1);

		T1 = X[i&0xf] += s0 + s1 + X[(i+9)&0xf];
		T1 += h + Sigma1(e) + Ch(e,f,g) + K256[i];
		T2 = Sigma0(a) + Maj(a,b,c);
		h = g;	g = f;	f = e;	e = d + T1;
		d = c;	c = b;	b = a;	a = T1 + T2;
		}

	ctx->h[0] += a;	ctx->h[1] += b;	ctx->h[2] += c;	ctx->h[3] += d;
	ctx->h[4] += e;	ctx->h[5] += f;	ctx->h[6] += g;	ctx->h[7] += h;

			}
}

#else

#define	ROUND_00_15(i,a,b,c,d,e,f,g,h)		do {	\
	T1 += h + Sigma1(e) + Ch(e,f,g) + K256[i];	\
	h = Sigma0(a) + Maj(a,b,c);			\
	d += T1;	h += T1;		} while (0)

#define	ROUND_16_63(i,a,b,c,d,e,f,g,h,X)	do {	\
	s0 = X[(i+1)&0x0f];	s0 = sigma0(s0);	\
	s1 = X[(i+14)&0x0f];	s1 = sigma1(s1);	\
	T1 = X[(i)&0x0f] += s0 + s1 + X[(i+9)&0x0f];	\
	ROUND_00_15(i,a,b,c,d,e,f,g,h);		} while (0)

static void sha256_block_data_order (SHA256_CTX *ctx, const void *in, size_t num)
	{
	unsigned MD32_REG_T a,b,c,d,e,f,g,h,s0,s1,T1;
	SHA_LONG	X[16];
	int i;
	const unsigned char *data=in;
	const union { long one; char little; } is_endian = {1};

			while (num--) {

	a = ctx->h[0];	b = ctx->h[1];	c = ctx->h[2];	d = ctx->h[3];
	e = ctx->h[4];	f = ctx->h[5];	g = ctx->h[6];	h = ctx->h[7];

	if (!is_endian.little && sizeof(SHA_LONG)==4 && ((size_t)in%4)==0)
		{
		const SHA_LONG *W=(const SHA_LONG *)data;

		T1 = X[0] = W[0];	ROUND_00_15(0,a,b,c,d,e,f,g,h);
		T1 = X[1] = W[1];	ROUND_00_15(1,h,a,b,c,d,e,f,g);
		T1 = X[2] = W[2];	ROUND_00_15(2,g,h,a,b,c,d,e,f);
		T1 = X[3] = W[3];	ROUND_00_15(3,f,g,h,a,b,c,d,e);
		T1 = X[4] = W[4];	ROUND_00_15(4,e,f,g,h,a,b,c,d);
		T1 = X[5] = W[5];	ROUND_00_15(5,d,e,f,g,h,a,b,c);
		T1 = X[6] = W[6];	ROUND_00_15(6,c,d,e,f,g,h,a,b);
		T1 = X[7] = W[7];	ROUND_00_15(7,b,c,d,e,f,g,h,a);
		T1 = X[8] = W[8];	ROUND_00_15(8,a,b,c,d,e,f,g,h);
		T1 = X[9] = W[9];	ROUND_00_15(9,h,a,b,c,d,e,f,g);
		T1 = X[10] = W[10];	ROUND_00_15(10,g,h,a,b,c,d,e,f);
		T1 = X[11] = W[11];	ROUND_00_15(11,f,g,h,a,b,c,d,e);
		T1 = X[12] = W[12];	ROUND_00_15(12,e,f,g,h,a,b,c,d);
		T1 = X[13] = W[13];	ROUND_00_15(13,d,e,f,g,h,a,b,c);
		T1 = X[14] = W[14];	ROUND_00_15(14,c,d,e,f,g,h,a,b);
		T1 = X[15] = W[15];	ROUND_00_15(15,b,c,d,e,f,g,h,a);

		data += SHA256_CBLOCK;
		}
	else
		{
		SHA_LONG l;

		HOST_c2l(data,l); T1 = X[0] = l;  ROUND_00_15(0,a,b,c,d,e,f,g,h);
		HOST_c2l(data,l); T1 = X[1] = l;  ROUND_00_15(1,h,a,b,c,d,e,f,g);
		HOST_c2l(data,l); T1 = X[2] = l;  ROUND_00_15(2,g,h,a,b,c,d,e,f);
		HOST_c2l(data,l); T1 = X[3] = l;  ROUND_00_15(3,f,g,h,a,b,c,d,e);
		HOST_c2l(data,l); T1 = X[4] = l;  ROUND_00_15(4,e,f,g,h,a,b,c,d);
		HOST_c2l(data,l); T1 = X[5] = l;  ROUND_00_15(5,d,e,f,g,h,a,b,c);
		HOST_c2l(data,l); T1 = X[6] = l;  ROUND_00_15(6,c,d,e,f,g,h,a,b);
		HOST_c2l(data,l); T1 = X[7] = l;  ROUND_00_15(7,b,c,d,e,f,g,h,a);
		HOST_c2l(data,l); T1 = X[8] = l;  ROUND_00_15(8,a,b,c,d,e,f,g,h);
		HOST_c2l(data,l); T1 = X[9] = l;  ROUND_00_15(9,h,a,b,c,d,e,f,g);
		HOST_c2l(data,l); T1 = X[10] = l; ROUND_00_15(10,g,h,a,b,c,d,e,f);
		HOST_c2l(data,l); T1 = X[11] = l; ROUND_00_15(11,f,g,h,a,b,c,d,e);
		HOST_c2l(data,l); T1 = X[12] = l; ROUND_00_15(12,e,f,g,h,a,b,c,d);
		HOST_c2l(data,l); T1 = X[13] = l; ROUND_00_15(13,d,e,f,g,h,a,b,c);
		HOST_c2l(data,l); T1 = X[14] = l; ROUND_00_15(14,c,d,e,f,g,h,a,b);
		HOST_c2l(data,l); T1 = X[15] = l; ROUND_00_15(15,b,c,d,e,f,g,h,a);
		}

	for (i=16;i<64;i+=8)
		{
		ROUND_16_63(i+0,a,b,c,d,e,f,g,h,X);
		ROUND_16_63(i+1,h,a,b,c,d,e,f,g,X);
		ROUND_16_63(i+2,g,h,a,b,c,d,e,f,X);
		ROUND_16_63(i+3,f,g,h,a,b,c,d,e,X);
		ROUND_16_63(i+4,e,f,g,h,a,b,c,d,X);
		ROUND_16_63(i+5,d,e,f,g,h,a,b,c,X);
		ROUND_16_63(i+6,c,d,e,f,g,h,a,b,X);
		ROUND_16_63(i+7,b,c,d,e,f,g,h,a,X);
		}

	ctx->h[0] += a;	ctx->h[1] += b;	ctx->h[2] += c;	ctx->h[3] += d;
	ctx->h[4] += e;	ctx->h[5] += f;	ctx->h[6] += g;	ctx->h[7] += h;

			}
	}

#endif
#endif /* SHA256_ASM */