Contents of /trunk/mkinitrd-magellan/busybox/coreutils/md5_sha1_sum.c
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Sun May 30 11:32:42 2010 UTC (14 years, 4 months ago) by niro
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File size: 4855 byte(s)
Sun May 30 11:32:42 2010 UTC (14 years, 4 months ago) by niro
File MIME type: text/plain
File size: 4855 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
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 { |
12 | /* 4th letter of applet_name is... */ |
13 | HASH_MD5 = 's', /* "md5>s<um" */ |
14 | HASH_SHA1 = '1', |
15 | HASH_SHA256 = '2', |
16 | HASH_SHA512 = '5', |
17 | } hash_algo_t; |
18 | |
19 | #define FLAG_SILENT 1 |
20 | #define FLAG_CHECK 2 |
21 | #define FLAG_WARN 4 |
22 | |
23 | /* This might be useful elsewhere */ |
24 | static unsigned char *hash_bin_to_hex(unsigned char *hash_value, |
25 | unsigned hash_length) |
26 | { |
27 | /* xzalloc zero-terminates */ |
28 | char *hex_value = xzalloc((hash_length * 2) + 1); |
29 | bin2hex(hex_value, (char*)hash_value, hash_length); |
30 | return (unsigned char *)hex_value; |
31 | } |
32 | |
33 | static uint8_t *hash_file(const char *filename /*, hash_algo_t hash_algo*/) |
34 | { |
35 | int src_fd, hash_len, count; |
36 | union _ctx_ { |
37 | sha512_ctx_t sha512; |
38 | sha256_ctx_t sha256; |
39 | sha1_ctx_t sha1; |
40 | md5_ctx_t md5; |
41 | } context; |
42 | uint8_t *hash_value = NULL; |
43 | RESERVE_CONFIG_UBUFFER(in_buf, 4096); |
44 | void FAST_FUNC (*update)(const void*, size_t, void*); |
45 | void FAST_FUNC (*final)(void*, void*); |
46 | hash_algo_t hash_algo = applet_name[3]; |
47 | |
48 | src_fd = open_or_warn_stdin(filename); |
49 | if (src_fd < 0) { |
50 | return NULL; |
51 | } |
52 | |
53 | /* figure specific hash algorithims */ |
54 | if (ENABLE_MD5SUM && hash_algo == HASH_MD5) { |
55 | md5_begin(&context.md5); |
56 | update = (void*)md5_hash; |
57 | final = (void*)md5_end; |
58 | hash_len = 16; |
59 | } else if (ENABLE_SHA1SUM && hash_algo == HASH_SHA1) { |
60 | sha1_begin(&context.sha1); |
61 | update = (void*)sha1_hash; |
62 | final = (void*)sha1_end; |
63 | hash_len = 20; |
64 | } else if (ENABLE_SHA256SUM && hash_algo == HASH_SHA256) { |
65 | sha256_begin(&context.sha256); |
66 | update = (void*)sha256_hash; |
67 | final = (void*)sha256_end; |
68 | hash_len = 32; |
69 | } else if (ENABLE_SHA512SUM && hash_algo == HASH_SHA512) { |
70 | sha512_begin(&context.sha512); |
71 | update = (void*)sha512_hash; |
72 | final = (void*)sha512_end; |
73 | hash_len = 64; |
74 | } else { |
75 | bb_error_msg_and_die("algorithm not supported"); |
76 | } |
77 | |
78 | while (0 < (count = safe_read(src_fd, in_buf, 4096))) { |
79 | update(in_buf, count, &context); |
80 | } |
81 | |
82 | if (count == 0) { |
83 | final(in_buf, &context); |
84 | hash_value = hash_bin_to_hex(in_buf, hash_len); |
85 | } |
86 | |
87 | RELEASE_CONFIG_BUFFER(in_buf); |
88 | |
89 | if (src_fd != STDIN_FILENO) { |
90 | close(src_fd); |
91 | } |
92 | |
93 | return hash_value; |
94 | } |
95 | |
96 | int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
97 | int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv) |
98 | { |
99 | int return_value = EXIT_SUCCESS; |
100 | uint8_t *hash_value; |
101 | unsigned flags; |
102 | /*hash_algo_t hash_algo = applet_name[3];*/ |
103 | |
104 | if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK) { |
105 | /* -b "binary", -t "text" are ignored (shaNNNsum compat) */ |
106 | flags = getopt32(argv, "scwbt"); |
107 | } |
108 | else optind = 1; |
109 | argv += optind; |
110 | //argc -= optind; |
111 | if (!*argv) |
112 | *--argv = (char*)"-"; |
113 | |
114 | if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && !(flags & FLAG_CHECK)) { |
115 | if (flags & FLAG_SILENT) { |
116 | bb_error_msg_and_die |
117 | ("-%c is meaningful only when verifying checksums", 's'); |
118 | } else if (flags & FLAG_WARN) { |
119 | bb_error_msg_and_die |
120 | ("-%c is meaningful only when verifying checksums", 'w'); |
121 | } |
122 | } |
123 | |
124 | if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) { |
125 | FILE *pre_computed_stream; |
126 | int count_total = 0; |
127 | int count_failed = 0; |
128 | char *line; |
129 | |
130 | if (argv[1]) { |
131 | bb_error_msg_and_die |
132 | ("only one argument may be specified when using -c"); |
133 | } |
134 | |
135 | pre_computed_stream = xfopen_stdin(argv[0]); |
136 | |
137 | while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) { |
138 | char *filename_ptr; |
139 | |
140 | count_total++; |
141 | filename_ptr = strstr(line, " "); |
142 | /* handle format for binary checksums */ |
143 | if (filename_ptr == NULL) { |
144 | filename_ptr = strstr(line, " *"); |
145 | } |
146 | if (filename_ptr == NULL) { |
147 | if (flags & FLAG_WARN) { |
148 | bb_error_msg("invalid format"); |
149 | } |
150 | count_failed++; |
151 | return_value = EXIT_FAILURE; |
152 | free(line); |
153 | continue; |
154 | } |
155 | *filename_ptr = '\0'; |
156 | filename_ptr += 2; |
157 | |
158 | hash_value = hash_file(filename_ptr /*, hash_algo*/); |
159 | |
160 | if (hash_value && (strcmp((char*)hash_value, line) == 0)) { |
161 | if (!(flags & FLAG_SILENT)) |
162 | printf("%s: OK\n", filename_ptr); |
163 | } else { |
164 | if (!(flags & FLAG_SILENT)) |
165 | printf("%s: FAILED\n", filename_ptr); |
166 | count_failed++; |
167 | return_value = EXIT_FAILURE; |
168 | } |
169 | /* possible free(NULL) */ |
170 | free(hash_value); |
171 | free(line); |
172 | } |
173 | if (count_failed && !(flags & FLAG_SILENT)) { |
174 | bb_error_msg("WARNING: %d of %d computed checksums did NOT match", |
175 | count_failed, count_total); |
176 | } |
177 | /* |
178 | if (fclose_if_not_stdin(pre_computed_stream) == EOF) { |
179 | bb_perror_msg_and_die("can't close file %s", file_ptr); |
180 | } |
181 | */ |
182 | } else { |
183 | do { |
184 | hash_value = hash_file(*argv/*, hash_algo*/); |
185 | if (hash_value == NULL) { |
186 | return_value = EXIT_FAILURE; |
187 | } else { |
188 | printf("%s %s\n", hash_value, *argv); |
189 | free(hash_value); |
190 | } |
191 | } while (*++argv); |
192 | } |
193 | return return_value; |
194 | } |