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> This patch fixes a memory leak in hash_file by using the BUFFER macros > instead of xmalloc. Please apply.
192 lines
4.7 KiB
C
192 lines
4.7 KiB
C
/*
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* Copyright (C) 2003 Glenn L. McGrath
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* Copyright (C) 2003-2004 Erik Andersen
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*
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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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*
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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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*
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <fcntl.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "busybox.h"
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#define FLAG_SILENT 1
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#define FLAG_CHECK 2
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#define FLAG_WARN 4
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/* This might be useful elsewhere */
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static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
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unsigned char hash_length)
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{
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int x, len, max;
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unsigned char *hex_value;
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max = (hash_length * 2) + 2;
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hex_value = xmalloc(max);
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for (x = len = 0; x < hash_length; x++) {
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len += snprintf(hex_value + len, max - len, "%02x", hash_value[x]);
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}
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return (hex_value);
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}
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static uint8_t *hash_file(const char *filename, uint8_t hash_algo)
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{
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int src_fd = strcmp(filename, "-") == 0 ? STDIN_FILENO :
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open(filename, O_RDONLY);
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if (src_fd == -1) {
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bb_perror_msg("%s", filename);
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return NULL;
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} else {
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uint8_t *hash_value;
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RESERVE_CONFIG_UBUFFER(hash_value_bin, 20);
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hash_value = hash_fd(src_fd, -1, hash_algo, hash_value_bin) != -2 ?
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hash_bin_to_hex(hash_value_bin, hash_algo == HASH_MD5 ? 16 : 20) :
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NULL;
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RELEASE_CONFIG_BUFFER(hash_value_bin);
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close(src_fd);
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return hash_value;
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}
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}
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/* This could become a common function for md5 as well, by using md5_stream */
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static int hash_files(int argc, char **argv, const uint8_t hash_algo)
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{
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int return_value = EXIT_SUCCESS;
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uint8_t *hash_value;
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#ifdef CONFIG_FEATURE_MD5_SHA1_SUM_CHECK
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unsigned int flags;
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flags = bb_getopt_ulflags(argc, argv, "scw");
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#endif
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#ifdef CONFIG_FEATURE_MD5_SHA1_SUM_CHECK
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if (!(flags & FLAG_CHECK)) {
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if (flags & FLAG_SILENT) {
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bb_error_msg_and_die
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("the -s option is meaningful only when verifying checksums");
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} else if (flags & FLAG_WARN) {
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bb_error_msg_and_die
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("the -w option is meaningful only when verifying checksums");
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}
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}
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#endif
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if (argc == optind) {
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argv[argc++] = "-";
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}
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#ifdef CONFIG_FEATURE_MD5_SHA1_SUM_CHECK
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if (flags & FLAG_CHECK) {
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FILE *pre_computed_stream;
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int count_total = 0;
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int count_failed = 0;
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unsigned char *file_ptr = argv[optind];
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char *line;
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if (optind + 1 != argc) {
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bb_error_msg_and_die
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("only one argument may be specified when using -c");
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}
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if (strcmp(file_ptr, "-") == 0) {
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pre_computed_stream = stdin;
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} else {
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pre_computed_stream = bb_xfopen(file_ptr, "r");
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}
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while ((line = bb_get_chomped_line_from_file(pre_computed_stream)) != NULL) {
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char *filename_ptr;
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count_total++;
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filename_ptr = strstr(line, " ");
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if (filename_ptr == NULL) {
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if (flags & FLAG_WARN) {
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bb_error_msg("Invalid format");
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}
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free(line);
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continue;
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}
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*filename_ptr = '\0';
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filename_ptr += 2;
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hash_value = hash_file(filename_ptr, hash_algo);
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if (hash_value && (strcmp(hash_value, line) == 0)) {
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if (!(flags & FLAG_SILENT))
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printf("%s: OK\n", filename_ptr);
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} else {
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if (!(flags & FLAG_SILENT))
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printf("%s: FAILED\n", filename_ptr);
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count_failed++;
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return_value = EXIT_FAILURE;
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}
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/* possible free(NULL) */
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free(hash_value);
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free(line);
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}
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if (count_failed && !(flags & FLAG_SILENT)) {
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bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
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count_failed, count_total);
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}
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if (bb_fclose_nonstdin(pre_computed_stream) == EOF) {
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bb_perror_msg_and_die("Couldnt close file %s", file_ptr);
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}
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} else
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#endif
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{
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uint8_t hash_length;
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if (hash_algo == HASH_MD5) {
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hash_length = 16;
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} else {
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hash_length = 20;
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}
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hash_value = xmalloc(hash_length);
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while (optind < argc) {
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unsigned char *file_ptr = argv[optind++];
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hash_value = hash_file(file_ptr, hash_algo);
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if (hash_value == NULL) {
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return_value = EXIT_FAILURE;
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} else {
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printf("%s %s\n", hash_value, file_ptr);
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free(hash_value);
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}
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}
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}
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return (return_value);
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}
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#ifdef CONFIG_MD5SUM
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extern int md5sum_main(int argc, char **argv)
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{
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return(hash_files(argc, argv, HASH_MD5));
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}
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#endif
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#ifdef CONFIG_SHA1SUM
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extern int sha1sum_main(int argc, char **argv)
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{
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return(hash_files(argc, argv, HASH_SHA1));
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}
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#endif
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