+/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2003 Glenn L. McGrath
* Copyright (C) 2003-2004 Erik Andersen
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
-#include <fcntl.h>
-#include <limits.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
#include "busybox.h"
+typedef enum { HASH_SHA1, HASH_MD5 } hash_algo_t;
#define FLAG_SILENT 1
#define FLAG_CHECK 2
/* This might be useful elsewhere */
static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
- unsigned char hash_length)
+ unsigned 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((char*)(hex_value + len), max - len, "%02x", hash_value[x]);
- }
- return (hex_value);
+ /* xzalloc zero-terminates */
+ char *hex_value = xzalloc((hash_length * 2) + 1);
+ bin2hex(hex_value, (char*)hash_value, hash_length);
+ return hex_value;
}
-static uint8_t *hash_file(const char *filename, uint8_t hash_algo)
+static uint8_t *hash_file(const char *filename, hash_algo_t hash_algo)
{
- int src_fd = strcmp(filename, "-") == 0 ? STDIN_FILENO :
- open(filename, O_RDONLY);
- if (src_fd == -1) {
- bb_perror_msg("%s", filename);
- return NULL;
+ int src_fd, hash_len, count;
+ union _ctx_ {
+ sha1_ctx_t sha1;
+ md5_ctx_t md5;
+ } context;
+ uint8_t *hash_value = NULL;
+ RESERVE_CONFIG_UBUFFER(in_buf, 4096);
+ void (*update)(const void*, size_t, void*);
+ void (*final)(void*, void*);
+
+ src_fd = STDIN_FILENO;
+ if (NOT_LONE_DASH(filename)) {
+ src_fd = open(filename, O_RDONLY);
+ if (src_fd < 0) {
+ bb_perror_msg("%s", filename);
+ return NULL;
+ }
+ }
+
+ /* figure specific hash algorithims */
+ if (ENABLE_MD5SUM && hash_algo==HASH_MD5) {
+ md5_begin(&context.md5);
+ update = (void (*)(const void*, size_t, void*))md5_hash;
+ final = (void (*)(void*, void*))md5_end;
+ hash_len = 16;
+ } else if (ENABLE_SHA1SUM && hash_algo==HASH_SHA1) {
+ sha1_begin(&context.sha1);
+ update = (void (*)(const void*, size_t, void*))sha1_hash;
+ final = (void (*)(void*, void*))sha1_end;
+ hash_len = 20;
} else {
- uint8_t *hash_value;
- RESERVE_CONFIG_UBUFFER(hash_value_bin, 20);
- hash_value = hash_fd(src_fd, -1, hash_algo, hash_value_bin) != -2 ?
- hash_bin_to_hex(hash_value_bin, hash_algo == HASH_MD5 ? 16 : 20) :
- NULL;
- RELEASE_CONFIG_BUFFER(hash_value_bin);
+ bb_error_msg_and_die("algorithm not supported");
+ }
+
+ while (0 < (count = safe_read(src_fd, in_buf, 4096))) {
+ update(in_buf, count, &context);
+ }
+
+ if (count == 0) {
+ final(in_buf, &context);
+ hash_value = hash_bin_to_hex(in_buf, hash_len);
+ }
+
+ RELEASE_CONFIG_BUFFER(in_buf);
+
+ if (src_fd != STDIN_FILENO) {
close(src_fd);
- return hash_value;
}
+
+ return hash_value;
}
-/* This could become a common function for md5 as well, by using md5_stream */
-static int hash_files(int argc, char **argv, const uint8_t hash_algo)
+int md5_sha1_sum_main(int argc, char **argv);
+int md5_sha1_sum_main(int argc, char **argv)
{
int return_value = EXIT_SUCCESS;
uint8_t *hash_value;
+ unsigned flags;
+ hash_algo_t hash_algo = ENABLE_MD5SUM
+ ? (ENABLE_SHA1SUM ? (**argv=='m' ? HASH_MD5 : HASH_SHA1) : HASH_MD5)
+ : HASH_SHA1;
-#ifdef CONFIG_FEATURE_MD5_SHA1_SUM_CHECK
- unsigned int flags;
+ if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK)
+ flags = getopt32(argc, argv, "scw");
+ else optind = 1;
- flags = bb_getopt_ulflags(argc, argv, "scw");
-#endif
-
-#ifdef CONFIG_FEATURE_MD5_SHA1_SUM_CHECK
- if (!(flags & FLAG_CHECK)) {
+ if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && !(flags & FLAG_CHECK)) {
if (flags & FLAG_SILENT) {
bb_error_msg_and_die
- ("the -s option is meaningful only when verifying checksums");
+ ("-%c is meaningful only when verifying checksums", 's');
} else if (flags & FLAG_WARN) {
bb_error_msg_and_die
- ("the -w option is meaningful only when verifying checksums");
+ ("-%c is meaningful only when verifying checksums", 'w');
}
}
-#endif
if (argc == optind) {
- argv[argc++] = "-";
+ argv[argc++] = (char*)"-";
}
-#ifdef CONFIG_FEATURE_MD5_SHA1_SUM_CHECK
- if (flags & FLAG_CHECK) {
+
+ if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
FILE *pre_computed_stream;
int count_total = 0;
int count_failed = 0;
("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");
+ pre_computed_stream = stdin;
+ if (NOT_LONE_DASH(file_ptr)) {
+ pre_computed_stream = xfopen(file_ptr, "r");
}
- while ((line = bb_get_chomped_line_from_file(pre_computed_stream)) != NULL) {
+ while ((line = xmalloc_getline(pre_computed_stream)) != NULL) {
char *filename_ptr;
count_total++;
filename_ptr = strstr(line, " ");
+ /* handle format for binary checksums */
+ if (filename_ptr == NULL) {
+ filename_ptr = strstr(line, " *");
+ }
if (filename_ptr == NULL) {
if (flags & FLAG_WARN) {
- bb_error_msg("Invalid format");
+ bb_error_msg("invalid format");
}
count_failed++;
return_value = EXIT_FAILURE;
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);
+ /*
+ if (fclose_if_not_stdin(pre_computed_stream) == EOF) {
+ bb_perror_msg_and_die("cannot close file %s", file_ptr);
}
- } else
-#endif
- {
- uint8_t hash_length;
-
- if (hash_algo == HASH_MD5) {
- hash_length = 16;
- } else {
- hash_length = 20;
- }
- hash_value = xmalloc(hash_length);
-
+ */
+ } else {
while (optind < argc) {
char *file_ptr = argv[optind++];
}
}
}
- return (return_value);
-}
-
-#ifdef CONFIG_MD5SUM
-int md5sum_main(int argc, char **argv)
-{
- return(hash_files(argc, argv, HASH_MD5));
-}
-#endif
-
-#ifdef CONFIG_SHA1SUM
-int sha1sum_main(int argc, char **argv)
-{
- return(hash_files(argc, argv, HASH_SHA1));
+ return return_value;
}
-#endif
projects / oweals / busybox.git / blobdiff