[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Copyright (C) 2003 Glenn L. McGrath
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| 4 | * Copyright (C) 2003-2004 Erik Andersen
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| 5 | *
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| 6 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 7 | */
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| 8 |
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| 9 | #include "libbb.h"
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| 10 |
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| 11 | /* This is a NOEXEC applet. Be very careful! */
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| 12 |
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| 13 | enum {
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| 14 | /* 4th letter of applet_name is... */
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| 15 | HASH_MD5 = 's', /* "md5>s<um" */
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| 16 | HASH_SHA1 = '1',
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| 17 | HASH_SHA256 = '2',
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| 18 | HASH_SHA512 = '5',
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| 19 | };
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| 20 |
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| 21 | #define FLAG_SILENT 1
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| 22 | #define FLAG_CHECK 2
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| 23 | #define FLAG_WARN 4
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| 24 |
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| 25 | /* This might be useful elsewhere */
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| 26 | static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
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| 27 | unsigned hash_length)
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| 28 | {
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| 29 | /* xzalloc zero-terminates */
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| 30 | char *hex_value = xzalloc((hash_length * 2) + 1);
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| 31 | bin2hex(hex_value, (char*)hash_value, hash_length);
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| 32 | return (unsigned char *)hex_value;
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| 33 | }
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| 34 |
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| 35 | static uint8_t *hash_file(const char *filename)
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| 36 | {
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| 37 | int src_fd, hash_len, count;
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| 38 | union _ctx_ {
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| 39 | sha512_ctx_t sha512;
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| 40 | sha256_ctx_t sha256;
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| 41 | sha1_ctx_t sha1;
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| 42 | md5_ctx_t md5;
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| 43 | } context;
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| 44 | uint8_t *hash_value = NULL;
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| 45 | RESERVE_CONFIG_UBUFFER(in_buf, 4096);
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| 46 | void FAST_FUNC (*update)(void*, const void*, size_t);
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| 47 | void FAST_FUNC (*final)(void*, void*);
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| 48 | char hash_algo;
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| 49 |
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| 50 | src_fd = open_or_warn_stdin(filename);
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| 51 | if (src_fd < 0) {
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| 52 | return NULL;
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| 53 | }
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| 54 |
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| 55 | hash_algo = applet_name[3];
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| 56 |
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| 57 | /* figure specific hash algorithims */
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| 58 | if (ENABLE_MD5SUM && hash_algo == HASH_MD5) {
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| 59 | md5_begin(&context.md5);
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| 60 | update = (void*)md5_hash;
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| 61 | final = (void*)md5_end;
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| 62 | hash_len = 16;
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| 63 | } else if (ENABLE_SHA1SUM && hash_algo == HASH_SHA1) {
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| 64 | sha1_begin(&context.sha1);
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| 65 | update = (void*)sha1_hash;
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| 66 | final = (void*)sha1_end;
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| 67 | hash_len = 20;
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| 68 | } else if (ENABLE_SHA256SUM && hash_algo == HASH_SHA256) {
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| 69 | sha256_begin(&context.sha256);
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| 70 | update = (void*)sha256_hash;
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| 71 | final = (void*)sha256_end;
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| 72 | hash_len = 32;
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| 73 | } else if (ENABLE_SHA512SUM && hash_algo == HASH_SHA512) {
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| 74 | sha512_begin(&context.sha512);
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| 75 | update = (void*)sha512_hash;
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| 76 | final = (void*)sha512_end;
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| 77 | hash_len = 64;
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| 78 | } else {
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| 79 | xfunc_die(); /* can't reach this */
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| 80 | }
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| 81 |
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| 82 | while ((count = safe_read(src_fd, in_buf, 4096)) > 0) {
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| 83 | update(&context, in_buf, count);
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| 84 | }
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| 85 |
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| 86 | if (count == 0) {
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| 87 | final(&context, in_buf);
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| 88 | hash_value = hash_bin_to_hex(in_buf, hash_len);
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| 89 | }
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| 90 |
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| 91 | RELEASE_CONFIG_BUFFER(in_buf);
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| 92 |
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| 93 | if (src_fd != STDIN_FILENO) {
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| 94 | close(src_fd);
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| 95 | }
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| 96 |
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| 97 | return hash_value;
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| 98 | }
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| 99 |
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| 100 | int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 101 | int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
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| 102 | {
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| 103 | int return_value = EXIT_SUCCESS;
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| 104 | unsigned flags;
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| 105 |
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| 106 | if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK) {
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| 107 | /* -b "binary", -t "text" are ignored (shaNNNsum compat) */
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| 108 | flags = getopt32(argv, "scwbt");
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| 109 | argv += optind;
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| 110 | //argc -= optind;
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| 111 | } else {
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| 112 | argv += 1;
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| 113 | //argc -= 1;
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| 114 | }
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| 115 | if (!*argv)
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| 116 | *--argv = (char*)"-";
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| 117 |
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| 118 | if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && !(flags & FLAG_CHECK)) {
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| 119 | if (flags & FLAG_SILENT) {
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| 120 | bb_error_msg_and_die("-%c is meaningful only with -c", 's');
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| 121 | }
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| 122 | if (flags & FLAG_WARN) {
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| 123 | bb_error_msg_and_die("-%c is meaningful only with -c", 'w');
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| 124 | }
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| 125 | }
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| 126 |
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| 127 | if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
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| 128 | FILE *pre_computed_stream;
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| 129 | int count_total = 0;
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| 130 | int count_failed = 0;
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| 131 | char *line;
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| 132 |
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| 133 | if (argv[1]) {
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| 134 | bb_error_msg_and_die("only one argument may be specified with -c");
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| 135 | }
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| 136 |
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| 137 | pre_computed_stream = xfopen_stdin(argv[0]);
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| 138 |
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| 139 | while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) {
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| 140 | uint8_t *hash_value;
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| 141 | char *filename_ptr;
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| 142 |
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| 143 | count_total++;
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| 144 | filename_ptr = strstr(line, " ");
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| 145 | /* handle format for binary checksums */
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| 146 | if (filename_ptr == NULL) {
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| 147 | filename_ptr = strstr(line, " *");
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| 148 | }
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| 149 | if (filename_ptr == NULL) {
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| 150 | if (flags & FLAG_WARN) {
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| 151 | bb_error_msg("invalid format");
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| 152 | }
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| 153 | count_failed++;
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| 154 | return_value = EXIT_FAILURE;
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| 155 | free(line);
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| 156 | continue;
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| 157 | }
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| 158 | *filename_ptr = '\0';
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| 159 | filename_ptr += 2;
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| 160 |
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| 161 | hash_value = hash_file(filename_ptr);
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| 162 |
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| 163 | if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
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| 164 | if (!(flags & FLAG_SILENT))
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| 165 | printf("%s: OK\n", filename_ptr);
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| 166 | } else {
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| 167 | if (!(flags & FLAG_SILENT))
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| 168 | printf("%s: FAILED\n", filename_ptr);
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| 169 | count_failed++;
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| 170 | return_value = EXIT_FAILURE;
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| 171 | }
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| 172 | /* possible free(NULL) */
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| 173 | free(hash_value);
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| 174 | free(line);
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| 175 | }
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| 176 | if (count_failed && !(flags & FLAG_SILENT)) {
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| 177 | bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
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| 178 | count_failed, count_total);
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| 179 | }
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| 180 | /*
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| 181 | if (fclose_if_not_stdin(pre_computed_stream) == EOF) {
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| 182 | bb_perror_msg_and_die("can't close file %s", file_ptr);
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| 183 | }
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| 184 | */
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| 185 | } else {
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| 186 | do {
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| 187 | uint8_t *hash_value = hash_file(*argv);
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| 188 | if (hash_value == NULL) {
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| 189 | return_value = EXIT_FAILURE;
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| 190 | } else {
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| 191 | printf("%s %s\n", hash_value, *argv);
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| 192 | free(hash_value);
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| 193 | }
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| 194 | } while (*++argv);
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| 195 | }
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| 196 | return return_value;
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| 197 | }
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