mirror of
https://github.com/reactos/ccache.git
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108 lines
2.2 KiB
C
108 lines
2.2 KiB
C
/*
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Copyright (C) Andrew Tridgell 2002
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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simple front-end functions to mdfour code
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*/
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#include "ccache.h"
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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void hash_buffer(struct mdfour *md, const char *s, int len)
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{
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mdfour_update(md, (unsigned char *)s, len);
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}
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void hash_start(struct mdfour *md)
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{
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mdfour_begin(md);
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}
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void hash_string(struct mdfour *md, const char *s)
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{
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hash_buffer(md, s, strlen(s));
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}
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void hash_int(struct mdfour *md, int x)
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{
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hash_buffer(md, (char *)&x, sizeof(x));
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}
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/*
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* Add contents of an open file to the hash. Returns 1 on success, otherwise 0.
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*/
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int hash_fd(struct mdfour *md, int fd)
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{
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char buf[1024];
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int n;
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while ((n = read(fd, buf, sizeof(buf))) > 0) {
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hash_buffer(md, buf, n);
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}
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if (n == 0) {
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return 1;
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} else {
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return 0;
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}
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}
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/*
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* Add contents of a file to the hash. Returns 1 on success, otherwise 0.
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*/
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int hash_file(struct mdfour *md, const char *fname)
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{
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int fd;
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int ret;
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fd = open(fname, O_RDONLY|O_BINARY);
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if (fd == -1) {
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return 0;
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}
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ret = hash_fd(md, fd);
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close(fd);
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return ret;
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}
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/* Return the hash result as a hex string. Caller frees. */
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char *hash_result(struct mdfour *md)
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{
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unsigned char sum[16];
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char *ret;
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int i;
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ret = x_malloc(53);
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hash_result_as_bytes(md, sum);
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for (i=0;i<16;i++) {
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sprintf(&ret[i*2], "%02x", (unsigned)sum[i]);
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}
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sprintf(&ret[i*2], "-%u", (unsigned)md->totalN);
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return ret;
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}
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/* return the hash result as 16 binary bytes */
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void hash_result_as_bytes(struct mdfour *md, unsigned char *out)
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{
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hash_buffer(md, NULL, 0);
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mdfour_result(md, out);
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}
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