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	niro	532	/* 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	niro	816	#include "libbb.h"
10	niro	532
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	niro	816	return (unsigned char *)hex_value;
25	niro	532	}
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	niro	816	void FAST_FUNC (update)(const void, size_t, void*);
37			void FAST_FUNC (final)(void, void*);
38	niro	532
39	niro	816	src_fd = open_or_warn_stdin(filename);
40			if (src_fd < 0) {
41			return NULL;
42	niro	532	}
43
44			/* figure specific hash algorithims */
45			if (ENABLE_MD5SUM && hash_algo==HASH_MD5) {
46			md5_begin(&context.md5);
47	niro	816	update = (void*)md5_hash;
48			final = (void*)md5_end;
49	niro	532	hash_len = 16;
50			} else if (ENABLE_SHA1SUM && hash_algo==HASH_SHA1) {
51			sha1_begin(&context.sha1);
52	niro	816	update = (void*)sha1_hash;
53			final = (void*)sha1_end;
54	niro	532	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	niro	816	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	niro	532	{
80			int return_value = EXIT_SUCCESS;
81			uint8_t *hash_value;
82			unsigned flags;
83			hash_algo_t hash_algo = ENABLE_MD5SUM
84	niro	816	? (ENABLE_SHA1SUM ? (applet_name[0] == 'm' ? HASH_MD5 : HASH_SHA1) : HASH_MD5)
85	niro	532	: HASH_SHA1;
86
87			if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK)
88	niro	816	flags = getopt32(argv, "scw");
89	niro	532	else optind = 1;
90	niro	816	argv += optind;
91			//argc -= optind;
92			if (!*argv)
93			--argv = (char)"-";
94	niro	532
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	niro	816	if (argv[1]) {
112	niro	532	bb_error_msg_and_die
113			("only one argument may be specified when using -c");
114			}
115
116	niro	816	pre_computed_stream = xfopen_stdin(argv[0]);
117	niro	532
118	niro	816	while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) {
119	niro	532	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	niro	816	do {
165			hash_value = hash_file(*argv, hash_algo);
166	niro	532	if (hash_value == NULL) {
167			return_value = EXIT_FAILURE;
168			} else {
169	niro	816	printf("%s %s\n", hash_value, *argv);
170	niro	532	free(hash_value);
171			}
172	niro	816	} while (*++argv);
173	niro	532	}
174			return return_value;
175			}