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 (6.5 kb)"
10 //config: default y
11 //config: help
12 //config: Compute and check MD5 message digest
13 //config:
14 //config:config SHA1SUM
15 //config: bool "sha1sum (5.9 kb)"
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 (7 kb)"
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 (7.4 kb)"
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 (6.1 kb)"
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: -s and -w are useful options when verifying checksums.
49
50 //applet:IF_MD5SUM(APPLET_NOEXEC(md5sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, md5sum))
51 //applet:IF_SHA1SUM(APPLET_NOEXEC(sha1sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, sha1sum))
52 //applet:IF_SHA3SUM(APPLET_NOEXEC(sha3sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, sha3sum))
53 //applet:IF_SHA256SUM(APPLET_NOEXEC(sha256sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, sha256sum))
54 //applet:IF_SHA512SUM(APPLET_NOEXEC(sha512sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, sha512sum))
55
56 //kbuild:lib-$(CONFIG_MD5SUM) += md5_sha1_sum.o
57 //kbuild:lib-$(CONFIG_SHA1SUM) += md5_sha1_sum.o
58 //kbuild:lib-$(CONFIG_SHA256SUM) += md5_sha1_sum.o
59 //kbuild:lib-$(CONFIG_SHA512SUM) += md5_sha1_sum.o
60 //kbuild:lib-$(CONFIG_SHA3SUM) += md5_sha1_sum.o
61
62 //usage:#define md5sum_trivial_usage
63 //usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
64 //usage:#define md5sum_full_usage "\n\n"
65 //usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " MD5 checksums"
66 //usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
67 //usage: "\n -c Check sums against list in FILEs"
68 //usage: "\n -s Don't output anything, status code shows success"
69 //usage: "\n -w Warn about improperly formatted checksum lines"
70 //usage: )
71 //usage:
72 //usage:#define md5sum_example_usage
73 //usage: "$ md5sum < busybox\n"
74 //usage: "6fd11e98b98a58f64ff3398d7b324003\n"
75 //usage: "$ md5sum busybox\n"
76 //usage: "6fd11e98b98a58f64ff3398d7b324003 busybox\n"
77 //usage: "$ md5sum -c -\n"
78 //usage: "6fd11e98b98a58f64ff3398d7b324003 busybox\n"
79 //usage: "busybox: OK\n"
80 //usage: "^D\n"
81 //usage:
82 //usage:#define sha1sum_trivial_usage
83 //usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
84 //usage:#define sha1sum_full_usage "\n\n"
85 //usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA1 checksums"
86 //usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
87 //usage: "\n -c Check sums against list in FILEs"
88 //usage: "\n -s Don't output anything, status code shows success"
89 //usage: "\n -w Warn about improperly formatted checksum lines"
90 //usage: )
91 //usage:
92 //usage:#define sha256sum_trivial_usage
93 //usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
94 //usage:#define sha256sum_full_usage "\n\n"
95 //usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA256 checksums"
96 //usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
97 //usage: "\n -c Check sums against list in FILEs"
98 //usage: "\n -s Don't output anything, status code shows success"
99 //usage: "\n -w Warn about improperly formatted checksum lines"
100 //usage: )
101 //usage:
102 //usage:#define sha512sum_trivial_usage
103 //usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
104 //usage:#define sha512sum_full_usage "\n\n"
105 //usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA512 checksums"
106 //usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
107 //usage: "\n -c Check sums against list in FILEs"
108 //usage: "\n -s Don't output anything, status code shows success"
109 //usage: "\n -w Warn about improperly formatted checksum lines"
110 //usage: )
111 //usage:
112 //usage:#define sha3sum_trivial_usage
113 //usage: IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[-a BITS] [FILE]..."
114 //usage:#define sha3sum_full_usage "\n\n"
115 //usage: "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA3 checksums"
116 //usage: IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
117 //usage: "\n -c Check sums against list in FILEs"
118 //usage: "\n -s Don't output anything, status code shows success"
119 //usage: "\n -w Warn about improperly formatted checksum lines"
120 //usage: )
121 //usage: "\n -a BITS 224 (default), 256, 384, 512"
122
123 //FIXME: GNU coreutils 8.25 has no -s option, it has only these two long opts:
124 // --quiet don't print OK for each successfully verified file
125 // --status don't output anything, status code shows success
126
127 #include "libbb.h"
128
129 /* This is a NOEXEC applet. Be very careful! */
130
131 enum {
132 /* 4th letter of applet_name is... */
133 HASH_MD5 = 's', /* "md5>s<um" */
134 HASH_SHA1 = '1',
135 HASH_SHA256 = '2',
136 HASH_SHA3 = '3',
137 HASH_SHA512 = '5',
138 };
139
140 #define FLAG_SILENT 1
141 #define FLAG_CHECK 2
142 #define FLAG_WARN 4
143
144 /* This might be useful elsewhere */
hash_bin_to_hex(unsigned char * hash_value,unsigned hash_length)145 static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
146 unsigned hash_length)
147 {
148 /* xzalloc zero-terminates */
149 char *hex_value = xzalloc((hash_length * 2) + 1);
150 bin2hex(hex_value, (char*)hash_value, hash_length);
151 return (unsigned char *)hex_value;
152 }
153
154 #if !ENABLE_SHA3SUM
155 # define hash_file(f,w) hash_file(f)
156 #endif
hash_file(const char * filename,unsigned sha3_width)157 static uint8_t *hash_file(const char *filename, unsigned sha3_width)
158 {
159 int src_fd, hash_len, count;
160 union _ctx_ {
161 sha3_ctx_t sha3;
162 sha512_ctx_t sha512;
163 sha256_ctx_t sha256;
164 sha1_ctx_t sha1;
165 md5_ctx_t md5;
166 } context;
167 uint8_t *hash_value;
168 void FAST_FUNC (*update)(void*, const void*, size_t);
169 unsigned FAST_FUNC (*final)(void*, void*);
170 char hash_algo;
171
172 src_fd = open_or_warn_stdin(filename);
173 if (src_fd < 0) {
174 return NULL;
175 }
176
177 hash_algo = applet_name[3];
178
179 /* figure specific hash algorithms */
180 if (ENABLE_MD5SUM && hash_algo == HASH_MD5) {
181 md5_begin(&context.md5);
182 update = (void*)md5_hash;
183 final = (void*)md5_end;
184 hash_len = 16;
185 }
186 else if (ENABLE_SHA1SUM && hash_algo == HASH_SHA1) {
187 sha1_begin(&context.sha1);
188 update = (void*)sha1_hash;
189 final = (void*)sha1_end;
190 hash_len = 20;
191 }
192 else if (ENABLE_SHA256SUM && hash_algo == HASH_SHA256) {
193 sha256_begin(&context.sha256);
194 update = (void*)sha256_hash;
195 final = (void*)sha256_end;
196 hash_len = 32;
197 }
198 else if (ENABLE_SHA512SUM && hash_algo == HASH_SHA512) {
199 sha512_begin(&context.sha512);
200 update = (void*)sha512_hash;
201 final = (void*)sha512_end;
202 hash_len = 64;
203 }
204 #if ENABLE_SHA3SUM
205 else if (ENABLE_SHA3SUM && hash_algo == HASH_SHA3) {
206 sha3_begin(&context.sha3);
207 update = (void*)sha3_hash;
208 final = (void*)sha3_end;
209 /*
210 * Should support 224, 256, 384, 512.
211 * We allow any value which does not blow the algorithm up.
212 */
213 if (sha3_width >= 1600/2 /* input block can't be <= 0 */
214 || sha3_width == 0 /* hash len can't be 0 */
215 || (sha3_width & 0x1f) /* should be multiple of 32 */
216 /* (because input uses up to 8 byte wide word XORs. 32/4=8) */
217 ) {
218 bb_error_msg_and_die("bad -a%u", sha3_width);
219 }
220 sha3_width /= 4;
221 context.sha3.input_block_bytes = 1600/8 - sha3_width;
222 hash_len = sha3_width/2;
223 }
224 #endif
225 else {
226 xfunc_die(); /* can't reach this */
227 }
228
229 {
230 RESERVE_CONFIG_UBUFFER(in_buf, 4096);
231 while ((count = safe_read(src_fd, in_buf, 4096)) > 0) {
232 update(&context, in_buf, count);
233 }
234 hash_value = NULL;
235 if (count < 0)
236 bb_perror_msg("can't read '%s'", filename);
237 else /* count == 0 */ {
238 final(&context, in_buf);
239 hash_value = hash_bin_to_hex(in_buf, hash_len);
240 }
241 RELEASE_CONFIG_BUFFER(in_buf);
242 }
243
244 if (src_fd != STDIN_FILENO) {
245 close(src_fd);
246 }
247
248 return hash_value;
249 }
250
251 int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
md5_sha1_sum_main(int argc UNUSED_PARAM,char ** argv)252 int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
253 {
254 int return_value = EXIT_SUCCESS;
255 unsigned flags;
256 #if ENABLE_SHA3SUM
257 unsigned sha3_width = 224;
258 #endif
259
260 if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK) {
261 /* -b "binary", -t "text" are ignored (shaNNNsum compat) */
262 /* -s and -w require -c */
263 #if ENABLE_SHA3SUM
264 if (applet_name[3] == HASH_SHA3)
265 flags = getopt32(argv, "^" "scwbta:+" "\0" "s?c:w?c", &sha3_width);
266 else
267 #endif
268 flags = getopt32(argv, "^" "scwbt" "\0" "s?c:w?c");
269 } else {
270 #if ENABLE_SHA3SUM
271 if (applet_name[3] == HASH_SHA3)
272 getopt32(argv, "a:+", &sha3_width);
273 else
274 #endif
275 getopt32(argv, "");
276 }
277 argv += optind;
278 //argc -= optind;
279 if (!*argv)
280 *--argv = (char*)"-";
281
282 do {
283 if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
284 FILE *pre_computed_stream;
285 char *line;
286 int count_total = 0;
287 int count_failed = 0;
288
289 pre_computed_stream = xfopen_stdin(*argv);
290
291 while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) {
292 uint8_t *hash_value;
293 char *filename_ptr;
294
295 count_total++;
296 filename_ptr = strstr(line, " ");
297 /* handle format for binary checksums */
298 if (filename_ptr == NULL) {
299 filename_ptr = strstr(line, " *");
300 }
301 if (filename_ptr == NULL) {
302 if (flags & FLAG_WARN) {
303 bb_simple_error_msg("invalid format");
304 }
305 count_failed++;
306 return_value = EXIT_FAILURE;
307 free(line);
308 continue;
309 }
310 *filename_ptr = '\0';
311 filename_ptr += 2;
312
313 hash_value = hash_file(filename_ptr, sha3_width);
314
315 if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
316 if (!(flags & FLAG_SILENT))
317 printf("%s: OK\n", filename_ptr);
318 } else {
319 if (!(flags & FLAG_SILENT))
320 printf("%s: FAILED\n", filename_ptr);
321 count_failed++;
322 return_value = EXIT_FAILURE;
323 }
324 /* possible free(NULL) */
325 free(hash_value);
326 free(line);
327 }
328 if (count_failed && !(flags & FLAG_SILENT)) {
329 bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
330 count_failed, count_total);
331 }
332 if (count_total == 0) {
333 return_value = EXIT_FAILURE;
334 /*
335 * md5sum from GNU coreutils 8.25 says:
336 * md5sum: <FILE>: no properly formatted MD5 checksum lines found
337 */
338 bb_error_msg("%s: no checksum lines found", *argv);
339 }
340 fclose_if_not_stdin(pre_computed_stream);
341 } else {
342 uint8_t *hash_value = hash_file(*argv, sha3_width);
343 if (hash_value == NULL) {
344 return_value = EXIT_FAILURE;
345 } else {
346 printf("%s %s\n", hash_value, *argv);
347 free(hash_value);
348 }
349 }
350 } while (*++argv);
351
352 return return_value;
353 }
354