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path: root/coreutils/md5_sha1_sum.c (plain)
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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 GPLv2 or later, see file LICENSE in this source tree.
7 */
8//config:config MD5SUM
9//config: bool "md5sum"
10//config: default y
11//config: help
12//config: md5sum is used to print or check MD5 checksums.
13//config:
14//config:config SHA1SUM
15//config: bool "sha1sum"
16//config: default y
17//config: help
18//config: Compute and check SHA1 message digest
19//config:
20//config:config SHA256SUM
21//config: bool "sha256sum"
22//config: default y
23//config: help
24//config: Compute and check SHA256 message digest
25//config:
26//config:config SHA512SUM
27//config: bool "sha512sum"
28//config: default y
29//config: help
30//config: Compute and check SHA512 message digest
31//config:
32//config:config SHA3SUM
33//config: bool "sha3sum"
34//config: default y
35//config: help
36//config: Compute and check SHA3 message digest
37//config:
38//config:comment "Common options for md5sum, sha1sum, sha256sum, sha512sum, sha3sum"
39//config: depends on MD5SUM || SHA1SUM || SHA256SUM || SHA512SUM || SHA3SUM
40//config:
41//config:config FEATURE_MD5_SHA1_SUM_CHECK
42//config: bool "Enable -c, -s and -w options"
43//config: default y
44//config: depends on MD5SUM || SHA1SUM || SHA256SUM || SHA512SUM || SHA3SUM
45//config: help
46//config: Enabling the -c options allows files to be checked
47//config: against pre-calculated hash values.
48//config:
49//config: -s and -w are useful options when verifying checksums.
50
51//applet:IF_MD5SUM(APPLET_NOEXEC(md5sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, md5sum))
52//applet:IF_SHA1SUM(APPLET_NOEXEC(sha1sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, sha1sum))
53//applet:IF_SHA3SUM(APPLET_NOEXEC(sha3sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, sha3sum))
54//applet:IF_SHA256SUM(APPLET_NOEXEC(sha256sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, sha256sum))
55//applet:IF_SHA512SUM(APPLET_NOEXEC(sha512sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, sha512sum))
56
57//kbuild:lib-$(CONFIG_MD5SUM) += md5_sha1_sum.o
58//kbuild:lib-$(CONFIG_SHA1SUM) += md5_sha1_sum.o
59//kbuild:lib-$(CONFIG_SHA256SUM) += md5_sha1_sum.o
60//kbuild:lib-$(CONFIG_SHA512SUM) += md5_sha1_sum.o
61//kbuild:lib-$(CONFIG_SHA3SUM) += md5_sha1_sum.o
62
63//usage:#define md5sum_trivial_usage
64//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
65//usage:#define md5sum_full_usage "\n\n"
66//usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " MD5 checksums"
67//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
68//usage: "\n -c Check sums against list in FILEs"
69//usage: "\n -s Don't output anything, status code shows success"
70//usage: "\n -w Warn about improperly formatted checksum lines"
71//usage: )
72//usage:
73//usage:#define md5sum_example_usage
74//usage: "$ md5sum < busybox\n"
75//usage: "6fd11e98b98a58f64ff3398d7b324003\n"
76//usage: "$ md5sum busybox\n"
77//usage: "6fd11e98b98a58f64ff3398d7b324003 busybox\n"
78//usage: "$ md5sum -c -\n"
79//usage: "6fd11e98b98a58f64ff3398d7b324003 busybox\n"
80//usage: "busybox: OK\n"
81//usage: "^D\n"
82//usage:
83//usage:#define sha1sum_trivial_usage
84//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
85//usage:#define sha1sum_full_usage "\n\n"
86//usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA1 checksums"
87//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
88//usage: "\n -c Check sums against list in FILEs"
89//usage: "\n -s Don't output anything, status code shows success"
90//usage: "\n -w Warn about improperly formatted checksum lines"
91//usage: )
92//usage:
93//usage:#define sha256sum_trivial_usage
94//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
95//usage:#define sha256sum_full_usage "\n\n"
96//usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA256 checksums"
97//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
98//usage: "\n -c Check sums against list in FILEs"
99//usage: "\n -s Don't output anything, status code shows success"
100//usage: "\n -w Warn about improperly formatted checksum lines"
101//usage: )
102//usage:
103//usage:#define sha512sum_trivial_usage
104//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
105//usage:#define sha512sum_full_usage "\n\n"
106//usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA512 checksums"
107//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
108//usage: "\n -c Check sums against list in FILEs"
109//usage: "\n -s Don't output anything, status code shows success"
110//usage: "\n -w Warn about improperly formatted checksum lines"
111//usage: )
112//usage:
113//usage:#define sha3sum_trivial_usage
114//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[-a BITS] [FILE]..."
115//usage:#define sha3sum_full_usage "\n\n"
116//usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA3 checksums"
117//usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
118//usage: "\n -c Check sums against list in FILEs"
119//usage: "\n -s Don't output anything, status code shows success"
120//usage: "\n -w Warn about improperly formatted checksum lines"
121//usage: "\n -a BITS 224 (default), 256, 384, 512"
122//usage: )
123
124//FIXME: GNU coreutils 8.25 has no -s option, it has only these two long opts:
125// --quiet don't print OK for each successfully verified file
126// --status don't output anything, status code shows success
127
128#include "libbb.h"
129
130/* This is a NOEXEC applet. Be very careful! */
131
132enum {
133 /* 4th letter of applet_name is... */
134 HASH_MD5 = 's', /* "md5>s<um" */
135 HASH_SHA1 = '1',
136 HASH_SHA256 = '2',
137 HASH_SHA3 = '3',
138 HASH_SHA512 = '5',
139};
140
141#define FLAG_SILENT 1
142#define FLAG_CHECK 2
143#define FLAG_WARN 4
144
145/* This might be useful elsewhere */
146static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
147 unsigned hash_length)
148{
149 /* xzalloc zero-terminates */
150 char *hex_value = xzalloc((hash_length * 2) + 1);
151 bin2hex(hex_value, (char*)hash_value, hash_length);
152 return (unsigned char *)hex_value;
153}
154
155#if !ENABLE_SHA3SUM
156# define hash_file(f,w) hash_file(f)
157#endif
158static uint8_t *hash_file(const char *filename, unsigned sha3_width)
159{
160 int src_fd, hash_len, count;
161 union _ctx_ {
162 sha3_ctx_t sha3;
163 sha512_ctx_t sha512;
164 sha256_ctx_t sha256;
165 sha1_ctx_t sha1;
166 md5_ctx_t md5;
167 } context;
168 uint8_t *hash_value;
169 void FAST_FUNC (*update)(void*, const void*, size_t);
170 void FAST_FUNC (*final)(void*, void*);
171 char hash_algo;
172
173 src_fd = open_or_warn_stdin(filename);
174 if (src_fd < 0) {
175 return NULL;
176 }
177
178 hash_algo = applet_name[3];
179
180 /* figure specific hash algorithms */
181 if (ENABLE_MD5SUM && hash_algo == HASH_MD5) {
182 md5_begin(&context.md5);
183 update = (void*)md5_hash;
184 final = (void*)md5_end;
185 hash_len = 16;
186 }
187 else if (ENABLE_SHA1SUM && hash_algo == HASH_SHA1) {
188 sha1_begin(&context.sha1);
189 update = (void*)sha1_hash;
190 final = (void*)sha1_end;
191 hash_len = 20;
192 }
193 else if (ENABLE_SHA256SUM && hash_algo == HASH_SHA256) {
194 sha256_begin(&context.sha256);
195 update = (void*)sha256_hash;
196 final = (void*)sha256_end;
197 hash_len = 32;
198 }
199 else if (ENABLE_SHA512SUM && hash_algo == HASH_SHA512) {
200 sha512_begin(&context.sha512);
201 update = (void*)sha512_hash;
202 final = (void*)sha512_end;
203 hash_len = 64;
204 }
205#if ENABLE_SHA3SUM
206 else if (ENABLE_SHA3SUM && hash_algo == HASH_SHA3) {
207 sha3_begin(&context.sha3);
208 update = (void*)sha3_hash;
209 final = (void*)sha3_end;
210 /*
211 * Should support 224, 256, 384, 512.
212 * We allow any value which does not blow the algorithm up.
213 */
214 if (sha3_width >= 1600/2 /* input block can't be <= 0 */
215 || sha3_width == 0 /* hash len can't be 0 */
216 || (sha3_width & 0x1f) /* should be multiple of 32 */
217 /* (because input uses up to 8 byte wide word XORs. 32/4=8) */
218 ) {
219 bb_error_msg_and_die("bad -a%u", sha3_width);
220 }
221 sha3_width /= 4;
222 context.sha3.input_block_bytes = 1600/8 - sha3_width;
223 hash_len = sha3_width/2;
224 }
225#endif
226 else {
227 xfunc_die(); /* can't reach this */
228 }
229
230 {
231 RESERVE_CONFIG_UBUFFER(in_buf, 4096);
232 while ((count = safe_read(src_fd, in_buf, 4096)) > 0) {
233 update(&context, in_buf, count);
234 }
235 hash_value = NULL;
236 if (count < 0)
237 bb_perror_msg("can't read '%s'", filename);
238 else /* count == 0 */ {
239 final(&context, in_buf);
240 hash_value = hash_bin_to_hex(in_buf, hash_len);
241 }
242 RELEASE_CONFIG_BUFFER(in_buf);
243 }
244
245 if (src_fd != STDIN_FILENO) {
246 close(src_fd);
247 }
248
249 return hash_value;
250}
251
252int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
253int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
254{
255 int return_value = EXIT_SUCCESS;
256 unsigned flags;
257#if ENABLE_SHA3SUM
258 unsigned sha3_width = 224;
259#endif
260
261 if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK) {
262 /* -s and -w require -c */
263 opt_complementary = "s?c:w?c";
264 /* -b "binary", -t "text" are ignored (shaNNNsum compat) */
265#if ENABLE_SHA3SUM
266 if (applet_name[3] == HASH_SHA3)
267 flags = getopt32(argv, "scwbta:+", &sha3_width);
268 else
269#endif
270 flags = getopt32(argv, "scwbt");
271 } else {
272#if ENABLE_SHA3SUM
273 if (applet_name[3] == HASH_SHA3)
274 getopt32(argv, "a:+", &sha3_width);
275 else
276#endif
277 getopt32(argv, "");
278 }
279 argv += optind;
280 //argc -= optind;
281 if (!*argv)
282 *--argv = (char*)"-";
283
284 do {
285 if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
286 FILE *pre_computed_stream;
287 char *line;
288 int count_total = 0;
289 int count_failed = 0;
290
291 pre_computed_stream = xfopen_stdin(*argv);
292
293 while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) {
294 uint8_t *hash_value;
295 char *filename_ptr;
296
297 count_total++;
298 filename_ptr = strstr(line, " ");
299 /* handle format for binary checksums */
300 if (filename_ptr == NULL) {
301 filename_ptr = strstr(line, " *");
302 }
303 if (filename_ptr == NULL) {
304 if (flags & FLAG_WARN) {
305 bb_error_msg("invalid format");
306 }
307 count_failed++;
308 return_value = EXIT_FAILURE;
309 free(line);
310 continue;
311 }
312 *filename_ptr = '\0';
313 filename_ptr += 2;
314
315 hash_value = hash_file(filename_ptr, sha3_width);
316
317 if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
318 if (!(flags & FLAG_SILENT))
319 printf("%s: OK\n", filename_ptr);
320 } else {
321 if (!(flags & FLAG_SILENT))
322 printf("%s: FAILED\n", filename_ptr);
323 count_failed++;
324 return_value = EXIT_FAILURE;
325 }
326 /* possible free(NULL) */
327 free(hash_value);
328 free(line);
329 }
330 if (count_failed && !(flags & FLAG_SILENT)) {
331 bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
332 count_failed, count_total);
333 }
334 if (count_total == 0) {
335 return_value = EXIT_FAILURE;
336 /*
337 * md5sum from GNU coreutils 8.25 says:
338 * md5sum: <FILE>: no properly formatted MD5 checksum lines found
339 */
340 bb_error_msg("%s: no checksum lines found", *argv);
341 }
342 fclose_if_not_stdin(pre_computed_stream);
343 } else {
344 uint8_t *hash_value = hash_file(*argv, sha3_width);
345 if (hash_value == NULL) {
346 return_value = EXIT_FAILURE;
347 } else {
348 printf("%s %s\n", hash_value, *argv);
349 free(hash_value);
350 }
351 }
352 } while (*++argv);
353
354 return return_value;
355}
356
generated by cgit at 2024-05-15 14:43:07 (GMT)