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authorGlenn L McGrath <bug1@ihug.co.nz>2003-11-10 04:33:55 +0000
committerGlenn L McGrath <bug1@ihug.co.nz>2003-11-10 04:33:55 +0000
commitd2a897aab084b433231aab5f6908a79cba67dc5d (patch)
tree8a0b113bd44bc2be639e070b50668e4ad69091f2 /coreutils/md5_sha1_sum.c
parent0bdf41ad7e81451bc829365e0d9a676dda8145f9 (diff)
downloadbusybox-d2a897aab084b433231aab5f6908a79cba67dc5d.tar.gz
Merge common parts of sha1sum and md5sum, which is everything except the
algorithms. Move algorithms to hash_fd and make them available via a common function.
Diffstat (limited to 'coreutils/md5_sha1_sum.c')
-rw-r--r--coreutils/md5_sha1_sum.c195
1 files changed, 195 insertions, 0 deletions
diff --git a/coreutils/md5_sha1_sum.c b/coreutils/md5_sha1_sum.c
new file mode 100644
index 000000000..f7c44c850
--- /dev/null
+++ b/coreutils/md5_sha1_sum.c
@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2003 Glenn L. McGrath
+ * Copyright (C) 2003 Erik Andersen
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "busybox.h"
+
+
+#define FLAG_SILENT 1
+#define FLAG_CHECK 2
+#define FLAG_WARN 4
+
+/* This might be usefull elsewhere */
+static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
+ unsigned char hash_length)
+{
+ int x, len, max;
+ unsigned char *hex_value;
+
+ max = (hash_length * 2) + 2;
+ hex_value = xmalloc(max);
+ for (x = len = 0; x < hash_length; x++) {
+ len += snprintf(hex_value + len, max - len, "%02x", hash_value[x]);
+ }
+ return (hex_value);
+}
+
+static uint8_t *hash_file(const char *filename, uint8_t hash_algo)
+{
+ uint8_t *hash_value_bin;
+ uint8_t *hash_value = NULL;
+ uint8_t hash_length;
+ int src_fd;
+
+ if (strcmp(filename, "-") == 0) {
+ src_fd = fileno(stdin);
+ } else {
+ src_fd = open(filename, O_RDONLY);
+ }
+
+ if (hash_algo == HASH_MD5) {
+ hash_length = 16;
+ } else {
+ hash_length = 20;
+ }
+
+ hash_value_bin = xmalloc(hash_length);
+
+ if ((src_fd != -1) && (hash_fd(src_fd, -1, hash_algo, hash_value_bin) != -2)) {
+ hash_value = hash_bin_to_hex(hash_value_bin, hash_length);
+ } else {
+ bb_perror_msg("%s", filename);
+ }
+
+ close(src_fd);
+
+ return(hash_value);
+}
+
+/* This could become a common function for md5 as well, by using md5_stream */
+extern int hash_files(int argc, char **argv, const uint8_t hash_algo)
+{
+ uint8_t *hash_value;
+ unsigned int flags;
+ int return_value = EXIT_SUCCESS;
+
+#ifdef CONFIG_FEATURE_MD5_SHA1_SUM_CHECK
+ flags = bb_getopt_ulflags(argc, argv, "scw");
+#else
+ flags = bb_getopt_ulflags(argc, argv, "s");
+#endif
+
+#ifdef CONFIG_FEATURE_MD5_SHA1_SUM_CHECK
+ if (!(flags & FLAG_CHECK)) {
+ if (flags & FLAG_SILENT) {
+ bb_error_msg_and_die
+ ("the -s option is meaningful only when verifying checksums");
+ } else if (flags & FLAG_WARN) {
+ bb_error_msg_and_die
+ ("the -w option is meaningful only when verifying checksums");
+ }
+ }
+#endif
+
+ if (argc == optind) {
+ argv[argc++] = "-";
+ }
+#ifdef CONFIG_FEATURE_MD5_SHA1_SUM_CHECK
+ if (flags & FLAG_CHECK) {
+ FILE *pre_computed_stream;
+ int count_total = 0;
+ int count_failed = 0;
+ unsigned char *file_ptr = argv[optind];
+ char *line;
+
+ if (optind + 1 != argc) {
+ bb_error_msg_and_die
+ ("only one argument may be specified when using -c");
+ }
+
+ if (strcmp(file_ptr, "-") == 0) {
+ pre_computed_stream = stdin;
+ } else {
+ pre_computed_stream = bb_xfopen(file_ptr, "r");
+ }
+
+ while ((line = bb_get_chomped_line_from_file(pre_computed_stream)) != NULL) {
+ char *filename_ptr;
+
+ count_total++;
+ filename_ptr = strstr(line, " ");
+ if (filename_ptr == NULL) {
+ if (flags & FLAG_WARN) {
+ bb_error_msg("Invalid format");
+ }
+ free(line);
+ continue;
+ }
+ *filename_ptr = '\0';
+ filename_ptr += 2;
+
+ hash_value = hash_file(filename_ptr, hash_algo);
+
+ if (hash_value && (strcmp(hash_value, line) == 0)) {
+ printf("%s: OK\n", filename_ptr);
+ } else {
+ printf("%s: FAILED\n", filename_ptr);
+ count_failed++;
+ }
+ /* possible free(NULL) */
+ free(hash_value);
+ free(line);
+ }
+ if (count_failed) {
+ bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
+ count_failed, count_total);
+ }
+ if (bb_fclose_nonstdin(pre_computed_stream) == EOF) {
+ bb_perror_msg_and_die("Couldnt close file %s", file_ptr);
+ }
+ } else
+#endif
+ while (optind < argc) {
+ unsigned char *file_ptr = argv[optind];
+
+ optind++;
+
+ hash_value = hash_file(file_ptr, hash_algo);
+ if (hash_value == NULL) {
+ return_value++;
+ }
+ else if (!flags & FLAG_SILENT) {
+ printf("%s %s\n", hash_value, file_ptr);
+ free(hash_value);
+ }
+ }
+
+ return (return_value);
+}
+
+#ifdef CONFIG_MD5SUM
+extern int md5sum_main(int argc, char **argv)
+{
+ return(hash_files(argc, argv, HASH_MD5));
+}
+#endif
+
+#ifdef CONFIG_SHA1SUM
+extern int sha1sum_main(int argc, char **argv)
+{
+ return(hash_files(argc, argv, HASH_SHA1));
+}
+#endif