busybox/coreutils/md5_sha1_sum.c

/* 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 "libbb.h"

typedef enum { HASH_SHA1, HASH_MD5 } hash_algo_t;

#define FLAG_SILENT	1
#define FLAG_CHECK	2
#define FLAG_WARN	4

/* This might be useful elsewhere */
static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
				unsigned hash_length)
{
	/* xzalloc zero-terminates */
	char *hex_value = xzalloc((hash_length * 2) + 1);
	bin2hex(hex_value, (char*)hash_value, hash_length);
	return (unsigned char *)hex_value;
}

static uint8_t *hash_file(const char *filename, hash_algo_t hash_algo)
{
	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 FAST_FUNC (*update)(const void*, size_t, void*);
	void FAST_FUNC (*final)(void*, void*);

	src_fd = open_or_warn_stdin(filename);
	if (src_fd < 0) {
		return NULL;
	}

	/* figure specific hash algorithims */
	if (ENABLE_MD5SUM && hash_algo==HASH_MD5) {
		md5_begin(&context.md5);
		update = (void*)md5_hash;
		final = (void*)md5_end;
		hash_len = 16;
	} else if (ENABLE_SHA1SUM && hash_algo==HASH_SHA1) {
		sha1_begin(&context.sha1);
		update = (void*)sha1_hash;
		final = (void*)sha1_end;
		hash_len = 20;
	} else {
		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;
}

int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
{
	int return_value = EXIT_SUCCESS;
	uint8_t *hash_value;
	unsigned flags;
	hash_algo_t hash_algo = ENABLE_MD5SUM
		? (ENABLE_SHA1SUM ? (applet_name[0] == 'm' ? HASH_MD5 : HASH_SHA1) : HASH_MD5)
		: HASH_SHA1;

	if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK)
		flags = getopt32(argv, "scw");
	else optind = 1;
	argv += optind;
	//argc -= optind;
	if (!*argv)
		*--argv = (char*)"-";

	if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && !(flags & FLAG_CHECK)) {
		if (flags & FLAG_SILENT) {
			bb_error_msg_and_die
				("-%c is meaningful only when verifying checksums", 's');
		} else if (flags & FLAG_WARN) {
			bb_error_msg_and_die
				("-%c is meaningful only when verifying checksums", 'w');
		}
	}

	if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
		FILE *pre_computed_stream;
		int count_total = 0;
		int count_failed = 0;
		char *line;

		if (argv[1]) {
			bb_error_msg_and_die
				("only one argument may be specified when using -c");
		}

		pre_computed_stream = xfopen_stdin(argv[0]);

		while ((line = xmalloc_fgetline(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");
				}
				count_failed++;
				return_value = EXIT_FAILURE;
				free(line);
				continue;
			}
			*filename_ptr = '\0';
			filename_ptr += 2;

			hash_value = hash_file(filename_ptr, hash_algo);

			if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
				if (!(flags & FLAG_SILENT))
					printf("%s: OK\n", filename_ptr);
			} else {
				if (!(flags & FLAG_SILENT))
					printf("%s: FAILED\n", filename_ptr);
				count_failed++;
				return_value = EXIT_FAILURE;
			}
			/* possible free(NULL) */
			free(hash_value);
			free(line);
		}
		if (count_failed && !(flags & FLAG_SILENT)) {
			bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
						 count_failed, count_total);
		}
		/*
		if (fclose_if_not_stdin(pre_computed_stream) == EOF) {
			bb_perror_msg_and_die("cannot close file %s", file_ptr);
		}
		*/
	} else {
		do {
			hash_value = hash_file(*argv, hash_algo);
			if (hash_value == NULL) {
				return_value = EXIT_FAILURE;
			} else {
				printf("%s  %s\n", hash_value, *argv);
				free(hash_value);
			}
		} while (*++argv);
	}
	return return_value;
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* Copyright (C) 2003 Glenn L. McGrath
4	* Copyright (C) 2003-2004 Erik Andersen
5	*
6	* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
7	*/
8
9	#include "libbb.h"
10
11	typedef enum { HASH_SHA1, HASH_MD5 } hash_algo_t;
12
13	#define FLAG_SILENT 1
14	#define FLAG_CHECK 2
15	#define FLAG_WARN 4
16
17	/* This might be useful elsewhere */
18	static unsigned char hash_bin_to_hex(unsigned char hash_value,
19	unsigned hash_length)
20	{
21	/* xzalloc zero-terminates */
22	char hex_value = xzalloc((hash_length 2) + 1);
23	bin2hex(hex_value, (char*)hash_value, hash_length);
24	return (unsigned char *)hex_value;
25	}
26
27	static uint8_t hash_file(const char filename, hash_algo_t hash_algo)
28	{
29	int src_fd, hash_len, count;
30	union _ctx_ {
31	sha1_ctx_t sha1;
32	md5_ctx_t md5;
33	} context;
34	uint8_t *hash_value = NULL;
35	RESERVE_CONFIG_UBUFFER(in_buf, 4096);
36	void FAST_FUNC (update)(const void, size_t, void*);
37	void FAST_FUNC (final)(void, void*);
38
39	src_fd = open_or_warn_stdin(filename);
40	if (src_fd < 0) {
41	return NULL;
42	}
43
44	/* figure specific hash algorithims */
45	if (ENABLE_MD5SUM && hash_algo==HASH_MD5) {
46	md5_begin(&context.md5);
47	update = (void*)md5_hash;
48	final = (void*)md5_end;
49	hash_len = 16;
50	} else if (ENABLE_SHA1SUM && hash_algo==HASH_SHA1) {
51	sha1_begin(&context.sha1);
52	update = (void*)sha1_hash;
53	final = (void*)sha1_end;
54	hash_len = 20;
55	} else {
56	bb_error_msg_and_die("algorithm not supported");
57	}
58
59	while (0 < (count = safe_read(src_fd, in_buf, 4096))) {
60	update(in_buf, count, &context);
61	}
62
63	if (count == 0) {
64	final(in_buf, &context);
65	hash_value = hash_bin_to_hex(in_buf, hash_len);
66	}
67
68	RELEASE_CONFIG_BUFFER(in_buf);
69
70	if (src_fd != STDIN_FILENO) {
71	close(src_fd);
72	}
73
74	return hash_value;
75	}
76
77	int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
78	int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
79	{
80	int return_value = EXIT_SUCCESS;
81	uint8_t *hash_value;
82	unsigned flags;
83	hash_algo_t hash_algo = ENABLE_MD5SUM
84	? (ENABLE_SHA1SUM ? (applet_name[0] == 'm' ? HASH_MD5 : HASH_SHA1) : HASH_MD5)
85	: HASH_SHA1;
86
87	if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK)
88	flags = getopt32(argv, "scw");
89	else optind = 1;
90	argv += optind;
91	//argc -= optind;
92	if (!*argv)
93	--argv = (char)"-";
94
95	if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && !(flags & FLAG_CHECK)) {
96	if (flags & FLAG_SILENT) {
97	bb_error_msg_and_die
98	("-%c is meaningful only when verifying checksums", 's');
99	} else if (flags & FLAG_WARN) {
100	bb_error_msg_and_die
101	("-%c is meaningful only when verifying checksums", 'w');
102	}
103	}
104
105	if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
106	FILE *pre_computed_stream;
107	int count_total = 0;
108	int count_failed = 0;
109	char *line;
110
111	if (argv[1]) {
112	bb_error_msg_and_die
113	("only one argument may be specified when using -c");
114	}
115
116	pre_computed_stream = xfopen_stdin(argv[0]);
117
118	while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) {
119	char *filename_ptr;
120
121	count_total++;
122	filename_ptr = strstr(line, " ");
123	/* handle format for binary checksums */
124	if (filename_ptr == NULL) {
125	filename_ptr = strstr(line, " *");
126	}
127	if (filename_ptr == NULL) {
128	if (flags & FLAG_WARN) {
129	bb_error_msg("invalid format");
130	}
131	count_failed++;
132	return_value = EXIT_FAILURE;
133	free(line);
134	continue;
135	}
136	*filename_ptr = '\0';
137	filename_ptr += 2;
138
139	hash_value = hash_file(filename_ptr, hash_algo);
140
141	if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
142	if (!(flags & FLAG_SILENT))
143	printf("%s: OK\n", filename_ptr);
144	} else {
145	if (!(flags & FLAG_SILENT))
146	printf("%s: FAILED\n", filename_ptr);
147	count_failed++;
148	return_value = EXIT_FAILURE;
149	}
150	/* possible free(NULL) */
151	free(hash_value);
152	free(line);
153	}
154	if (count_failed && !(flags & FLAG_SILENT)) {
155	bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
156	count_failed, count_total);
157	}
158	/*
159	if (fclose_if_not_stdin(pre_computed_stream) == EOF) {
160	bb_perror_msg_and_die("cannot close file %s", file_ptr);
161	}
162	*/
163	} else {
164	do {
165	hash_value = hash_file(*argv, hash_algo);
166	if (hash_value == NULL) {
167	return_value = EXIT_FAILURE;
168	} else {
169	printf("%s %s\n", hash_value, *argv);
170	free(hash_value);
171	}
172	} while (*++argv);
173	}
174	return return_value;
175	}