a6080a0a44
This uses "git-apply --whitespace=strip" to fix whitespace errors that have crept in to our source files over time. There are a few files that need to have trailing whitespaces (most notably, test vectors). The results still passes the test, and build result in Documentation/ area is unchanged. Signed-off-by: Junio C Hamano <gitster@pobox.com>
73 lines
1.4 KiB
C
73 lines
1.4 KiB
C
/*
|
|
* SHA-1 implementation.
|
|
*
|
|
* Copyright (C) 2005 Paul Mackerras <paulus@samba.org>
|
|
*
|
|
* This version assumes we are running on a big-endian machine.
|
|
* It calls an external sha1_core() to process blocks of 64 bytes.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include "sha1.h"
|
|
|
|
extern void sha1_core(uint32_t *hash, const unsigned char *p,
|
|
unsigned int nblocks);
|
|
|
|
int SHA1_Init(SHA_CTX *c)
|
|
{
|
|
c->hash[0] = 0x67452301;
|
|
c->hash[1] = 0xEFCDAB89;
|
|
c->hash[2] = 0x98BADCFE;
|
|
c->hash[3] = 0x10325476;
|
|
c->hash[4] = 0xC3D2E1F0;
|
|
c->len = 0;
|
|
c->cnt = 0;
|
|
return 0;
|
|
}
|
|
|
|
int SHA1_Update(SHA_CTX *c, const void *ptr, unsigned long n)
|
|
{
|
|
unsigned long nb;
|
|
const unsigned char *p = ptr;
|
|
|
|
c->len += (uint64_t) n << 3;
|
|
while (n != 0) {
|
|
if (c->cnt || n < 64) {
|
|
nb = 64 - c->cnt;
|
|
if (nb > n)
|
|
nb = n;
|
|
memcpy(&c->buf.b[c->cnt], p, nb);
|
|
if ((c->cnt += nb) == 64) {
|
|
sha1_core(c->hash, c->buf.b, 1);
|
|
c->cnt = 0;
|
|
}
|
|
} else {
|
|
nb = n >> 6;
|
|
sha1_core(c->hash, p, nb);
|
|
nb <<= 6;
|
|
}
|
|
n -= nb;
|
|
p += nb;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int SHA1_Final(unsigned char *hash, SHA_CTX *c)
|
|
{
|
|
unsigned int cnt = c->cnt;
|
|
|
|
c->buf.b[cnt++] = 0x80;
|
|
if (cnt > 56) {
|
|
if (cnt < 64)
|
|
memset(&c->buf.b[cnt], 0, 64 - cnt);
|
|
sha1_core(c->hash, c->buf.b, 1);
|
|
cnt = 0;
|
|
}
|
|
if (cnt < 56)
|
|
memset(&c->buf.b[cnt], 0, 56 - cnt);
|
|
c->buf.l[7] = c->len;
|
|
sha1_core(c->hash, c->buf.b, 1);
|
|
memcpy(hash, c->hash, 20);
|
|
return 0;
|
|
}
|