2 * Based on the Mozilla SHA1 (see mozilla-sha1/sha1.c),
3 * optimized to do word accesses rather than byte accesses,
4 * and to avoid unnecessary copies into the context array.
12 /* Hash one 64-byte block of data */
13 static void blk_SHA1Block(blk_SHA_CTX
*ctx
, const unsigned int *data
);
15 void blk_SHA1_Init(blk_SHA_CTX
*ctx
)
19 /* Initialize H with the magic constants (see FIPS180 for constants)
21 ctx
->H
[0] = 0x67452301;
22 ctx
->H
[1] = 0xefcdab89;
23 ctx
->H
[2] = 0x98badcfe;
24 ctx
->H
[3] = 0x10325476;
25 ctx
->H
[4] = 0xc3d2e1f0;
29 void blk_SHA1_Update(blk_SHA_CTX
*ctx
, const void *data
, unsigned long len
)
31 int lenW
= ctx
->size
& 63;
35 /* Read the data into W and process blocks as they get full
41 memcpy(lenW
+ (char *)ctx
->W
, data
, left
);
42 lenW
= (lenW
+ left
) & 63;
47 blk_SHA1Block(ctx
, ctx
->W
);
50 blk_SHA1Block(ctx
, data
);
55 memcpy(ctx
->W
, data
, len
);
59 void blk_SHA1_Final(unsigned char hashout
[20], blk_SHA_CTX
*ctx
)
61 static const unsigned char pad
[64] = { 0x80 };
62 unsigned int padlen
[2];
65 /* Pad with a binary 1 (ie 0x80), then zeroes, then length
67 padlen
[0] = htonl(ctx
->size
>> 29);
68 padlen
[1] = htonl(ctx
->size
<< 3);
71 blk_SHA1_Update(ctx
, pad
, 1+ (63 & (55 - i
)));
72 blk_SHA1_Update(ctx
, padlen
, 8);
76 for (i
= 0; i
< 5; i
++)
77 ((unsigned int *)hashout
)[i
] = htonl(ctx
->H
[i
]);
80 #if defined(__i386__) || defined(__x86_64__)
82 #define SHA_ASM(op, x, n) ({ unsigned int __res; __asm__(op " %1,%0":"=r" (__res):"i" (n), "0" (x)); __res; })
83 #define SHA_ROL(x,n) SHA_ASM("rol", x, n)
84 #define SHA_ROR(x,n) SHA_ASM("ror", x, n)
88 #define SHA_ROT(X,l,r) (((X) << (l)) | ((X) >> (r)))
89 #define SHA_ROL(X,n) SHA_ROT(X,n,32-(n))
90 #define SHA_ROR(X,n) SHA_ROT(X,32-(n),n)
94 /* This "rolls" over the 512-bit array */
95 #define W(x) (array[(x)&15])
98 * Where do we get the source from? The first 16 iterations get it from
99 * the input data, the next mix it from the 512-bit array.
101 #define SHA_SRC(t) htonl(data[t])
102 #define SHA_MIX(t) SHA_ROL(W(t+13) ^ W(t+8) ^ W(t+2) ^ W(t), 1)
104 #define SHA_ROUND(t, input, fn, constant, A, B, C, D, E) do { \
105 unsigned int TEMP = input(t); W(t) = TEMP; \
106 TEMP += E + SHA_ROL(A,5) + (fn) + (constant); \
107 B = SHA_ROR(B, 2); E = TEMP; } while (0)
109 #define T_0_15(t, A, B, C, D, E) SHA_ROUND(t, SHA_SRC, (((C^D)&B)^D) , 0x5a827999, A, B, C, D, E )
110 #define T_16_19(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, (((C^D)&B)^D) , 0x5a827999, A, B, C, D, E )
111 #define T_20_39(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, (B^C^D) , 0x6ed9eba1, A, B, C, D, E )
112 #define T_40_59(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, ((B&C)+(D&(B^C))) , 0x8f1bbcdc, A, B, C, D, E )
113 #define T_60_79(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, (B^C^D) , 0xca62c1d6, A, B, C, D, E )
115 static void blk_SHA1Block(blk_SHA_CTX
*ctx
, const unsigned int *data
)
117 unsigned int A
,B
,C
,D
,E
;
118 unsigned int array
[16];
126 /* Round 1 - iterations 0-16 take their input from 'data' */
127 T_0_15( 0, A
, B
, C
, D
, E
);
128 T_0_15( 1, E
, A
, B
, C
, D
);
129 T_0_15( 2, D
, E
, A
, B
, C
);
130 T_0_15( 3, C
, D
, E
, A
, B
);
131 T_0_15( 4, B
, C
, D
, E
, A
);
132 T_0_15( 5, A
, B
, C
, D
, E
);
133 T_0_15( 6, E
, A
, B
, C
, D
);
134 T_0_15( 7, D
, E
, A
, B
, C
);
135 T_0_15( 8, C
, D
, E
, A
, B
);
136 T_0_15( 9, B
, C
, D
, E
, A
);
137 T_0_15(10, A
, B
, C
, D
, E
);
138 T_0_15(11, E
, A
, B
, C
, D
);
139 T_0_15(12, D
, E
, A
, B
, C
);
140 T_0_15(13, C
, D
, E
, A
, B
);
141 T_0_15(14, B
, C
, D
, E
, A
);
142 T_0_15(15, A
, B
, C
, D
, E
);
144 /* Round 1 - tail. Input from 512-bit mixing array */
145 T_16_19(16, E
, A
, B
, C
, D
);
146 T_16_19(17, D
, E
, A
, B
, C
);
147 T_16_19(18, C
, D
, E
, A
, B
);
148 T_16_19(19, B
, C
, D
, E
, A
);
151 T_20_39(20, A
, B
, C
, D
, E
);
152 T_20_39(21, E
, A
, B
, C
, D
);
153 T_20_39(22, D
, E
, A
, B
, C
);
154 T_20_39(23, C
, D
, E
, A
, B
);
155 T_20_39(24, B
, C
, D
, E
, A
);
156 T_20_39(25, A
, B
, C
, D
, E
);
157 T_20_39(26, E
, A
, B
, C
, D
);
158 T_20_39(27, D
, E
, A
, B
, C
);
159 T_20_39(28, C
, D
, E
, A
, B
);
160 T_20_39(29, B
, C
, D
, E
, A
);
161 T_20_39(30, A
, B
, C
, D
, E
);
162 T_20_39(31, E
, A
, B
, C
, D
);
163 T_20_39(32, D
, E
, A
, B
, C
);
164 T_20_39(33, C
, D
, E
, A
, B
);
165 T_20_39(34, B
, C
, D
, E
, A
);
166 T_20_39(35, A
, B
, C
, D
, E
);
167 T_20_39(36, E
, A
, B
, C
, D
);
168 T_20_39(37, D
, E
, A
, B
, C
);
169 T_20_39(38, C
, D
, E
, A
, B
);
170 T_20_39(39, B
, C
, D
, E
, A
);
173 T_40_59(40, A
, B
, C
, D
, E
);
174 T_40_59(41, E
, A
, B
, C
, D
);
175 T_40_59(42, D
, E
, A
, B
, C
);
176 T_40_59(43, C
, D
, E
, A
, B
);
177 T_40_59(44, B
, C
, D
, E
, A
);
178 T_40_59(45, A
, B
, C
, D
, E
);
179 T_40_59(46, E
, A
, B
, C
, D
);
180 T_40_59(47, D
, E
, A
, B
, C
);
181 T_40_59(48, C
, D
, E
, A
, B
);
182 T_40_59(49, B
, C
, D
, E
, A
);
183 T_40_59(50, A
, B
, C
, D
, E
);
184 T_40_59(51, E
, A
, B
, C
, D
);
185 T_40_59(52, D
, E
, A
, B
, C
);
186 T_40_59(53, C
, D
, E
, A
, B
);
187 T_40_59(54, B
, C
, D
, E
, A
);
188 T_40_59(55, A
, B
, C
, D
, E
);
189 T_40_59(56, E
, A
, B
, C
, D
);
190 T_40_59(57, D
, E
, A
, B
, C
);
191 T_40_59(58, C
, D
, E
, A
, B
);
192 T_40_59(59, B
, C
, D
, E
, A
);
195 T_60_79(60, A
, B
, C
, D
, E
);
196 T_60_79(61, E
, A
, B
, C
, D
);
197 T_60_79(62, D
, E
, A
, B
, C
);
198 T_60_79(63, C
, D
, E
, A
, B
);
199 T_60_79(64, B
, C
, D
, E
, A
);
200 T_60_79(65, A
, B
, C
, D
, E
);
201 T_60_79(66, E
, A
, B
, C
, D
);
202 T_60_79(67, D
, E
, A
, B
, C
);
203 T_60_79(68, C
, D
, E
, A
, B
);
204 T_60_79(69, B
, C
, D
, E
, A
);
205 T_60_79(70, A
, B
, C
, D
, E
);
206 T_60_79(71, E
, A
, B
, C
, D
);
207 T_60_79(72, D
, E
, A
, B
, C
);
208 T_60_79(73, C
, D
, E
, A
, B
);
209 T_60_79(74, B
, C
, D
, E
, A
);
210 T_60_79(75, A
, B
, C
, D
, E
);
211 T_60_79(76, E
, A
, B
, C
, D
);
212 T_60_79(77, D
, E
, A
, B
, C
);
213 T_60_79(78, C
, D
, E
, A
, B
);
214 T_60_79(79, B
, C
, D
, E
, A
);