]>
jfr.im git - irc/quakenet/newserv.git/blob - lib/sha1.c
1 /* $OpenBSD: sha1.c,v 1.12 2003/07/21 20:37:08 millert Exp $ */
5 * By Steve Reid <steve@edmweb.com>
8 * Test Vectors (from FIPS PUB 180-1)
10 * A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
11 * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
12 * 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
13 * A million repetitions of "a"
14 * 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
17 #if defined(LIBC_SCCS) && !defined(lint)
18 static char rcsid
[] = "$OpenBSD: sha1.c,v 1.12 2003/07/21 20:37:08 millert Exp $";
19 #endif /* LIBC_SCCS and not lint */
21 #define SHA1HANDSOFF /* Copies data before messing with it. */
23 #include <sys/param.h>
27 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
30 * blk0() and blk() perform the initial expand.
31 * I got the idea of expanding during the round function from SSLeay
33 #if BYTE_ORDER == LITTLE_ENDIAN
34 # define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \
35 |(rol(block->l[i],8)&0x00FF00FF))
37 # define blk0(i) block->l[i]
39 #define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
40 ^block->l[(i+2)&15]^block->l[i&15],1))
43 * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1
45 #define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
46 #define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
47 #define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
48 #define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
49 #define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
57 static void do_R01(u_int32_t
*a
, u_int32_t
*b
, u_int32_t
*c
, u_int32_t
*d
, u_int32_t
*e
, CHAR64LONG16
*);
58 static void do_R2(u_int32_t
*a
, u_int32_t
*b
, u_int32_t
*c
, u_int32_t
*d
, u_int32_t
*e
, CHAR64LONG16
*);
59 static void do_R3(u_int32_t
*a
, u_int32_t
*b
, u_int32_t
*c
, u_int32_t
*d
, u_int32_t
*e
, CHAR64LONG16
*);
60 static void do_R4(u_int32_t
*a
, u_int32_t
*b
, u_int32_t
*c
, u_int32_t
*d
, u_int32_t
*e
, CHAR64LONG16
*);
62 #define nR0(v,w,x,y,z,i) R0(*v,*w,*x,*y,*z,i)
63 #define nR1(v,w,x,y,z,i) R1(*v,*w,*x,*y,*z,i)
64 #define nR2(v,w,x,y,z,i) R2(*v,*w,*x,*y,*z,i)
65 #define nR3(v,w,x,y,z,i) R3(*v,*w,*x,*y,*z,i)
66 #define nR4(v,w,x,y,z,i) R4(*v,*w,*x,*y,*z,i)
69 do_R01(u_int32_t
*a
, u_int32_t
*b
, u_int32_t
*c
, u_int32_t
*d
, u_int32_t
*e
, CHAR64LONG16
*block
)
71 nR0(a
,b
,c
,d
,e
, 0); nR0(e
,a
,b
,c
,d
, 1); nR0(d
,e
,a
,b
,c
, 2); nR0(c
,d
,e
,a
,b
, 3);
72 nR0(b
,c
,d
,e
,a
, 4); nR0(a
,b
,c
,d
,e
, 5); nR0(e
,a
,b
,c
,d
, 6); nR0(d
,e
,a
,b
,c
, 7);
73 nR0(c
,d
,e
,a
,b
, 8); nR0(b
,c
,d
,e
,a
, 9); nR0(a
,b
,c
,d
,e
,10); nR0(e
,a
,b
,c
,d
,11);
74 nR0(d
,e
,a
,b
,c
,12); nR0(c
,d
,e
,a
,b
,13); nR0(b
,c
,d
,e
,a
,14); nR0(a
,b
,c
,d
,e
,15);
75 nR1(e
,a
,b
,c
,d
,16); nR1(d
,e
,a
,b
,c
,17); nR1(c
,d
,e
,a
,b
,18); nR1(b
,c
,d
,e
,a
,19);
79 do_R2(u_int32_t
*a
, u_int32_t
*b
, u_int32_t
*c
, u_int32_t
*d
, u_int32_t
*e
, CHAR64LONG16
*block
)
81 nR2(a
,b
,c
,d
,e
,20); nR2(e
,a
,b
,c
,d
,21); nR2(d
,e
,a
,b
,c
,22); nR2(c
,d
,e
,a
,b
,23);
82 nR2(b
,c
,d
,e
,a
,24); nR2(a
,b
,c
,d
,e
,25); nR2(e
,a
,b
,c
,d
,26); nR2(d
,e
,a
,b
,c
,27);
83 nR2(c
,d
,e
,a
,b
,28); nR2(b
,c
,d
,e
,a
,29); nR2(a
,b
,c
,d
,e
,30); nR2(e
,a
,b
,c
,d
,31);
84 nR2(d
,e
,a
,b
,c
,32); nR2(c
,d
,e
,a
,b
,33); nR2(b
,c
,d
,e
,a
,34); nR2(a
,b
,c
,d
,e
,35);
85 nR2(e
,a
,b
,c
,d
,36); nR2(d
,e
,a
,b
,c
,37); nR2(c
,d
,e
,a
,b
,38); nR2(b
,c
,d
,e
,a
,39);
89 do_R3(u_int32_t
*a
, u_int32_t
*b
, u_int32_t
*c
, u_int32_t
*d
, u_int32_t
*e
, CHAR64LONG16
*block
)
91 nR3(a
,b
,c
,d
,e
,40); nR3(e
,a
,b
,c
,d
,41); nR3(d
,e
,a
,b
,c
,42); nR3(c
,d
,e
,a
,b
,43);
92 nR3(b
,c
,d
,e
,a
,44); nR3(a
,b
,c
,d
,e
,45); nR3(e
,a
,b
,c
,d
,46); nR3(d
,e
,a
,b
,c
,47);
93 nR3(c
,d
,e
,a
,b
,48); nR3(b
,c
,d
,e
,a
,49); nR3(a
,b
,c
,d
,e
,50); nR3(e
,a
,b
,c
,d
,51);
94 nR3(d
,e
,a
,b
,c
,52); nR3(c
,d
,e
,a
,b
,53); nR3(b
,c
,d
,e
,a
,54); nR3(a
,b
,c
,d
,e
,55);
95 nR3(e
,a
,b
,c
,d
,56); nR3(d
,e
,a
,b
,c
,57); nR3(c
,d
,e
,a
,b
,58); nR3(b
,c
,d
,e
,a
,59);
99 do_R4(u_int32_t
*a
, u_int32_t
*b
, u_int32_t
*c
, u_int32_t
*d
, u_int32_t
*e
, CHAR64LONG16
*block
)
101 nR4(a
,b
,c
,d
,e
,60); nR4(e
,a
,b
,c
,d
,61); nR4(d
,e
,a
,b
,c
,62); nR4(c
,d
,e
,a
,b
,63);
102 nR4(b
,c
,d
,e
,a
,64); nR4(a
,b
,c
,d
,e
,65); nR4(e
,a
,b
,c
,d
,66); nR4(d
,e
,a
,b
,c
,67);
103 nR4(c
,d
,e
,a
,b
,68); nR4(b
,c
,d
,e
,a
,69); nR4(a
,b
,c
,d
,e
,70); nR4(e
,a
,b
,c
,d
,71);
104 nR4(d
,e
,a
,b
,c
,72); nR4(c
,d
,e
,a
,b
,73); nR4(b
,c
,d
,e
,a
,74); nR4(a
,b
,c
,d
,e
,75);
105 nR4(e
,a
,b
,c
,d
,76); nR4(d
,e
,a
,b
,c
,77); nR4(c
,d
,e
,a
,b
,78); nR4(b
,c
,d
,e
,a
,79);
110 * Hash a single 512-bit block. This is the core of the algorithm.
113 SHA1Transform(u_int32_t state
[5], const u_char buffer
[64])
115 u_int32_t a
, b
, c
, d
, e
;
119 CHAR64LONG16 workspace
;
121 (void)memcpy(block
, buffer
, 64);
123 block
= (CHAR64LONG16
*)buffer
;
126 /* Copy context->state[] to working vars */
134 do_R01(&a
, &b
, &c
, &d
, &e
, block
);
135 do_R2(&a
, &b
, &c
, &d
, &e
, block
);
136 do_R3(&a
, &b
, &c
, &d
, &e
, block
);
137 do_R4(&a
, &b
, &c
, &d
, &e
, block
);
139 /* 4 rounds of 20 operations each. Loop unrolled. */
140 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);
141 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);
142 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);
143 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);
144 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);
145 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);
146 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);
147 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);
148 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);
149 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);
150 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);
151 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);
152 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);
153 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);
154 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);
155 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);
156 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);
157 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);
158 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);
159 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);
162 /* Add the working vars back into context.state[] */
170 a
= b
= c
= d
= e
= 0;
175 * SHA1Init - Initialize new context
178 SHA1Init(SHA1_CTX
*context
)
181 /* SHA1 initialization constants */
182 context
->state
[0] = 0x67452301;
183 context
->state
[1] = 0xEFCDAB89;
184 context
->state
[2] = 0x98BADCFE;
185 context
->state
[3] = 0x10325476;
186 context
->state
[4] = 0xC3D2E1F0;
187 context
->count
[0] = context
->count
[1] = 0;
192 * Run your data through this.
195 SHA1Update(SHA1_CTX
*context
, const u_char
*data
, u_int len
)
199 j
= context
->count
[0];
200 if ((context
->count
[0] += len
<< 3) < j
)
201 context
->count
[1] += (len
>>29)+1;
203 if ((j
+ len
) > 63) {
204 (void)memcpy(&context
->buffer
[j
], data
, (i
= 64-j
));
205 SHA1Transform(context
->state
, context
->buffer
);
206 for ( ; i
+ 63 < len
; i
+= 64)
207 SHA1Transform(context
->state
, &data
[i
]);
212 (void)memcpy(&context
->buffer
[j
], &data
[i
], len
- i
);
217 * Add padding and return the message digest.
220 SHA1Final(u_char digest
[20], SHA1_CTX
*context
)
223 u_char finalcount
[8];
225 for (i
= 0; i
< 8; i
++) {
226 finalcount
[i
] = (u_char
)((context
->count
[(i
>= 4 ? 0 : 1)]
227 >> ((3-(i
& 3)) * 8) ) & 255); /* Endian independent */
229 SHA1Update(context
, (u_char
*)"\200", 1);
230 while ((context
->count
[0] & 504) != 448)
231 SHA1Update(context
, (u_char
*)"\0", 1);
232 SHA1Update(context
, finalcount
, 8); /* Should cause a SHA1Transform() */
235 for (i
= 0; i
< 20; i
++)
237 ((context
->state
[i
>>2] >> ((3-(i
& 3)) * 8) ) & 255);