/build/ldns-qX87Yo/ldns-1.8.4/sha1.c
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/*
* modified for ldns by Jelte Jansen, original taken from OpenBSD:
*
* SHA-1 in C
* By Steve Reid <steve@edmweb.com>
* 100% Public Domain
*
* Test Vectors (from FIPS PUB 180-1)
* "abc"
* A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
* "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
* 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
* A million repetitions of "a"
* 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
*/
/* #define LITTLE_ENDIAN * This should be #define'd already, if true. */
#include <ldns/config.h>
#include <ldns/ldns.h>
#include <strings.h>
#define SHA1HANDSOFF 1 /* Copies data before messing with it. */
#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
/* blk0() and blk() perform the initial expand. */
/* I got the idea of expanding during the round function from SSLeay */
#if BYTE_ORDER == LITTLE_ENDIAN
#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \
|(rol(block->l[i],8)&0x00FF00FF))
#else
#define blk0(i) block->l[i]
#endif
#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
^block->l[(i+2)&15]^block->l[i&15],1))
/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
/* Hash a single 512-bit block. This is the core of the algorithm. */
void
ldns_sha1_transform(uint32_t state[5], const unsigned char buffer[LDNS_SHA1_BLOCK_LENGTH])
{
uint32_t a, b, c, d, e;
typedef union {
unsigned char c[64];
unsigned int l[16];
} CHAR64LONG16;
CHAR64LONG16* block;
#ifdef SHA1HANDSOFF
unsigned char workspace[LDNS_SHA1_BLOCK_LENGTH];
block = (CHAR64LONG16 *)workspace;
memmove(block, buffer, LDNS_SHA1_BLOCK_LENGTH);
#else
block = (CHAR64LONG16 *)buffer;
#endif
/* Copy context->state[] to working vars */
a = state[0];
b = state[1];
c = state[2];
d = state[3];
e = state[4];
/* 4 rounds of 20 operations each. Loop unrolled. */
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
/* Add the working vars back into context.state[] */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
/* Wipe variables */
a = b = c = d = e = 0;
(void)a;
}
/* SHA1Init - Initialize new context */
void
ldns_sha1_init(ldns_sha1_ctx *context)
{
/* SHA1 initialization constants */
context->count = 0;
context->state[0] = 0x67452301;
context->state[1] = 0xEFCDAB89;
context->state[2] = 0x98BADCFE;
context->state[3] = 0x10325476;
context->state[4] = 0xC3D2E1F0;
}
/* Run your data through this. */
void
ldns_sha1_update(ldns_sha1_ctx *context, const unsigned char *data, unsigned int len)
{
unsigned int i;
unsigned int j;
j = (unsigned)(uint32_t)((context->count >> 3) & 63);
context->count += (len << 3);
if ((j + len) > 63) {
memmove(&context->buffer[j], data, (i = 64 - j));
ldns_sha1_transform(context->state, context->buffer);
for ( ; i + 63 < len; i += 64) {
ldns_sha1_transform(context->state, &data[i]);
}
j = 0;
}
else i = 0;
memmove(&context->buffer[j], &data[i], len - i);
}
/* Add padding and return the message digest. */
void
ldns_sha1_final(unsigned char digest[LDNS_SHA1_DIGEST_LENGTH], ldns_sha1_ctx *context)
{
unsigned int i;
unsigned char finalcount[8];
for (i = 0; i < 8; i++) {
finalcount[i] = (unsigned char)((context->count >>
((7 - (i & 7)) * 8)) & 255); /* Endian independent */
}
ldns_sha1_update(context, (unsigned char *)"\200", 1);
while ((context->count & 504) != 448) {
ldns_sha1_update(context, (unsigned char *)"\0", 1);
}
ldns_sha1_update(context, finalcount, 8); /* Should cause a SHA1Transform() */
if (digest != NULL)
for (i = 0; i < LDNS_SHA1_DIGEST_LENGTH; i++) {
digest[i] = (unsigned char)((context->state[i >> 2] >>
((3 - (i & 3)) * 8)) & 255);
}
#ifdef SHA1HANDSOFF /* make SHA1Transform overwrite its own static vars */
ldns_sha1_transform(context->state, context->buffer);
#endif
}
unsigned char *
ldns_sha1(const unsigned char *data, unsigned int data_len, unsigned char *digest)
{
ldns_sha1_ctx ctx;
ldns_sha1_init(&ctx);
ldns_sha1_update(&ctx, data, data_len);
ldns_sha1_final(digest, &ctx);
return digest;
}
config.h
ldns.h
Including this file will include all ldns files, and define some lookup tables.
R1
#define R1(v, w, x, y, z, i)
Definition sha1.c:39
ldns_sha1
unsigned char * ldns_sha1(const unsigned char *data, unsigned int data_len, unsigned char *digest)
Convenience function to digest a fixed block of data at once.
Definition sha1.c:171
ldns_sha1_update
void ldns_sha1_update(ldns_sha1_ctx *context, const unsigned char *data, unsigned int len)
Definition sha1.c:122
R2
#define R2(v, w, x, y, z, i)
Definition sha1.c:40
R0
#define R0(v, w, x, y, z, i)
Definition sha1.c:38
ldns_sha1_transform
void ldns_sha1_transform(uint32_t state[5], const unsigned char buffer[LDNS_SHA1_BLOCK_LENGTH])
Definition sha1.c:47
R3
#define R3(v, w, x, y, z, i)
Definition sha1.c:41
ldns_sha1_final
void ldns_sha1_final(unsigned char digest[LDNS_SHA1_DIGEST_LENGTH], ldns_sha1_ctx *context)
Definition sha1.c:145
R4
#define R4(v, w, x, y, z, i)
Definition sha1.c:42
ldns_sha1_init
void ldns_sha1_init(ldns_sha1_ctx *context)
Definition sha1.c:107
LDNS_SHA1_DIGEST_LENGTH
#define LDNS_SHA1_DIGEST_LENGTH
Definition sha1.h:16
LDNS_SHA1_BLOCK_LENGTH
#define LDNS_SHA1_BLOCK_LENGTH
Definition sha1.h:15
ldns_sha1_ctx
Definition sha1.h:18
ldns_sha1_ctx::state
uint32_t state[5]
Definition sha1.h:19
ldns_sha1_ctx::buffer
unsigned char buffer[64]
Definition sha1.h:21
ldns_sha1_ctx::count
uint64_t count
Definition sha1.h:20