/* * 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 ppc_sha1_core(uint32_t *hash, const unsigned char *p, unsigned int nblocks); int ppc_SHA1_Init(ppc_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 ppc_SHA1_Update(ppc_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) { ppc_sha1_core(c->hash, c->buf.b, 1); c->cnt = 0; } } else { nb = n >> 6; ppc_sha1_core(c->hash, p, nb); nb <<= 6; } n -= nb; p += nb; } return 0; } int ppc_SHA1_Final(unsigned char *hash, ppc_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); ppc_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; ppc_sha1_core(c->hash, c->buf.b, 1); memcpy(hash, c->hash, 20); return 0; }