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jfr.im git - solanum.git/blob - wsockd/sha1.c
2 * Based on the SHA-1 C implementation by Steve Reid <steve@edmweb.com>
5 * Test Vectors (from FIPS PUB 180-1)
7 * A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
8 * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
9 * 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
10 * A million repetitions of "a"
11 * 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
15 #include <netinet/in.h> // for htonl()
18 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
20 // blk0() and blk() perform the initial expand. blk0() deals with host endianess
21 #define blk0(i) (block[i] = htonl(block[i]))
22 #define blk(i) (block[i&15] = rol(block[(i+13)&15]^block[(i+8)&15]^block[(i+2)&15]^block[i&15],1))
24 // (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1
25 #define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
26 #define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
27 #define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
28 #define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
29 #define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
31 // hash a single 512-bit block. this is the core of the algorithm
32 static uint32_t sha1_transform(SHA1
*sha1
, const uint8_t buffer
[SHA1_BLOCK_LENGTH
]) {
33 uint32_t a
, b
, c
, d
, e
;
34 uint32_t block
[SHA1_BLOCK_LENGTH
/ 4];
36 memcpy(&block
, buffer
, SHA1_BLOCK_LENGTH
);
38 // copy sha1->state[] to working variables
45 // 4 rounds of 20 operations each (loop unrolled)
46 R0(a
,b
,c
,d
,e
, 0); R0(e
,a
,b
,c
,d
, 1); R0(d
,e
,a
,b
,c
, 2); R0(c
,d
,e
,a
,b
, 3);
47 R0(b
,c
,d
,e
,a
, 4); R0(a
,b
,c
,d
,e
, 5); R0(e
,a
,b
,c
,d
, 6); R0(d
,e
,a
,b
,c
, 7);
48 R0(c
,d
,e
,a
,b
, 8); R0(b
,c
,d
,e
,a
, 9); R0(a
,b
,c
,d
,e
,10); R0(e
,a
,b
,c
,d
,11);
49 R0(d
,e
,a
,b
,c
,12); R0(c
,d
,e
,a
,b
,13); R0(b
,c
,d
,e
,a
,14); R0(a
,b
,c
,d
,e
,15);
50 R1(e
,a
,b
,c
,d
,16); R1(d
,e
,a
,b
,c
,17); R1(c
,d
,e
,a
,b
,18); R1(b
,c
,d
,e
,a
,19);
52 R2(a
,b
,c
,d
,e
,20); R2(e
,a
,b
,c
,d
,21); R2(d
,e
,a
,b
,c
,22); R2(c
,d
,e
,a
,b
,23);
53 R2(b
,c
,d
,e
,a
,24); R2(a
,b
,c
,d
,e
,25); R2(e
,a
,b
,c
,d
,26); R2(d
,e
,a
,b
,c
,27);
54 R2(c
,d
,e
,a
,b
,28); R2(b
,c
,d
,e
,a
,29); R2(a
,b
,c
,d
,e
,30); R2(e
,a
,b
,c
,d
,31);
55 R2(d
,e
,a
,b
,c
,32); R2(c
,d
,e
,a
,b
,33); R2(b
,c
,d
,e
,a
,34); R2(a
,b
,c
,d
,e
,35);
56 R2(e
,a
,b
,c
,d
,36); R2(d
,e
,a
,b
,c
,37); R2(c
,d
,e
,a
,b
,38); R2(b
,c
,d
,e
,a
,39);
58 R3(a
,b
,c
,d
,e
,40); R3(e
,a
,b
,c
,d
,41); R3(d
,e
,a
,b
,c
,42); R3(c
,d
,e
,a
,b
,43);
59 R3(b
,c
,d
,e
,a
,44); R3(a
,b
,c
,d
,e
,45); R3(e
,a
,b
,c
,d
,46); R3(d
,e
,a
,b
,c
,47);
60 R3(c
,d
,e
,a
,b
,48); R3(b
,c
,d
,e
,a
,49); R3(a
,b
,c
,d
,e
,50); R3(e
,a
,b
,c
,d
,51);
61 R3(d
,e
,a
,b
,c
,52); R3(c
,d
,e
,a
,b
,53); R3(b
,c
,d
,e
,a
,54); R3(a
,b
,c
,d
,e
,55);
62 R3(e
,a
,b
,c
,d
,56); R3(d
,e
,a
,b
,c
,57); R3(c
,d
,e
,a
,b
,58); R3(b
,c
,d
,e
,a
,59);
64 R4(a
,b
,c
,d
,e
,60); R4(e
,a
,b
,c
,d
,61); R4(d
,e
,a
,b
,c
,62); R4(c
,d
,e
,a
,b
,63);
65 R4(b
,c
,d
,e
,a
,64); R4(a
,b
,c
,d
,e
,65); R4(e
,a
,b
,c
,d
,66); R4(d
,e
,a
,b
,c
,67);
66 R4(c
,d
,e
,a
,b
,68); R4(b
,c
,d
,e
,a
,69); R4(a
,b
,c
,d
,e
,70); R4(e
,a
,b
,c
,d
,71);
67 R4(d
,e
,a
,b
,c
,72); R4(c
,d
,e
,a
,b
,73); R4(b
,c
,d
,e
,a
,74); R4(a
,b
,c
,d
,e
,75);
68 R4(e
,a
,b
,c
,d
,76); R4(d
,e
,a
,b
,c
,77); R4(c
,d
,e
,a
,b
,78); R4(b
,c
,d
,e
,a
,79);
70 // add the working variables back into sha1->state[]
78 a
= b
= c
= d
= e
= 0;
80 return a
; // return a to avoid dead-store warning from clang static analyzer
83 void sha1_init(SHA1
*sha1
) {
84 sha1
->state
[0] = 0x67452301;
85 sha1
->state
[1] = 0xEFCDAB89;
86 sha1
->state
[2] = 0x98BADCFE;
87 sha1
->state
[3] = 0x10325476;
88 sha1
->state
[4] = 0xC3D2E1F0;
92 void sha1_update(SHA1
*sha1
, const uint8_t *data
, size_t length
) {
95 j
= (size_t)((sha1
->count
>> 3) & 63);
96 sha1
->count
+= (length
<< 3);
98 if ((j
+ length
) > 63) {
101 memcpy(&sha1
->buffer
[j
], data
, i
);
102 sha1_transform(sha1
, sha1
->buffer
);
104 for (; i
+ 63 < length
; i
+= 64) {
105 sha1_transform(sha1
, &data
[i
]);
113 memcpy(&sha1
->buffer
[j
], &data
[i
], length
- i
);
116 void sha1_final(SHA1
*sha1
, uint8_t digest
[SHA1_DIGEST_LENGTH
]) {
120 for (i
= 0; i
< 8; i
++) {
121 // this is endian independent
122 count
[i
] = (uint8_t)((sha1
->count
>> ((7 - (i
& 7)) * 8)) & 255);
125 sha1_update(sha1
, (uint8_t *)"\200", 1);
127 while ((sha1
->count
& 504) != 448) {
128 sha1_update(sha1
, (uint8_t *)"\0", 1);
131 sha1_update(sha1
, count
, 8);
133 for (i
= 0; i
< SHA1_DIGEST_LENGTH
; i
++) {
134 digest
[i
] = (uint8_t)((sha1
->state
[i
>> 2] >> ((3 - (i
& 3)) * 8)) & 255);
137 memset(sha1
, 0, sizeof(*sha1
));