coreutils/md5_sha1_sum.c

   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
   9 //usage:#define md5sum_trivial_usage
  10 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
  11 //usage:#define md5sum_full_usage "\n\n"
  12 //usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " MD5 checksums"
  13 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
  14 //usage:     "\n        -c      Check sums against list in FILEs"
  15 //usage:     "\n        -s      Don't output anything, status code shows success"
  16 //usage:     "\n        -w      Warn about improperly formatted checksum lines"
  17 //usage:        )
  18 //usage:
  19 //usage:#define md5sum_example_usage
  20 //usage:       "$ md5sum < busybox\n"
  21 //usage:       "6fd11e98b98a58f64ff3398d7b324003\n"
  22 //usage:       "$ md5sum busybox\n"
  23 //usage:       "6fd11e98b98a58f64ff3398d7b324003  busybox\n"
  24 //usage:       "$ md5sum -c -\n"
  25 //usage:       "6fd11e98b98a58f64ff3398d7b324003  busybox\n"
  26 //usage:       "busybox: OK\n"
  27 //usage:       "^D\n"
  28 //usage:
  29 //usage:#define sha1sum_trivial_usage
  30 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
  31 //usage:#define sha1sum_full_usage "\n\n"
  32 //usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA1 checksums"
  33 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
  34 //usage:     "\n        -c      Check sums against list in FILEs"
  35 //usage:     "\n        -s      Don't output anything, status code shows success"
  36 //usage:     "\n        -w      Warn about improperly formatted checksum lines"
  37 //usage:        )
  38 //usage:
  39 //usage:#define sha256sum_trivial_usage
  40 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
  41 //usage:#define sha256sum_full_usage "\n\n"
  42 //usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA256 checksums"
  43 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
  44 //usage:     "\n        -c      Check sums against list in FILEs"
  45 //usage:     "\n        -s      Don't output anything, status code shows success"
  46 //usage:     "\n        -w      Warn about improperly formatted checksum lines"
  47 //usage:        )
  48 //usage:
  49 //usage:#define sha512sum_trivial_usage
  50 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
  51 //usage:#define sha512sum_full_usage "\n\n"
  52 //usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA512 checksums"
  53 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
  54 //usage:     "\n        -c      Check sums against list in FILEs"
  55 //usage:     "\n        -s      Don't output anything, status code shows success"
  56 //usage:     "\n        -w      Warn about improperly formatted checksum lines"
  57 //usage:        )
  58
  59 #include "libbb.h"
  60
  61 /* This is a NOEXEC applet. Be very careful! */
  62
  63 enum {
  64         /* 4th letter of applet_name is... */
  65         HASH_MD5 = 's', /* "md5>s<um" */
  66         HASH_SHA1 = '1',
  67         HASH_SHA256 = '2',
  68         HASH_SHA512 = '5',
  69 };
  70
  71 #define FLAG_SILENT  1
  72 #define FLAG_CHECK   2
  73 #define FLAG_WARN    4
  74
  75 /* This might be useful elsewhere */
  76 static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
  77                                 unsigned hash_length)
  78 {
  79         /* xzalloc zero-terminates */
  80         char *hex_value = xzalloc((hash_length * 2) + 1);
  81         bin2hex(hex_value, (char*)hash_value, hash_length);
  82         return (unsigned char *)hex_value;
  83 }
  84
  85 static uint8_t *hash_file(const char *filename)
  86 {
  87         int src_fd, hash_len, count;
  88         union _ctx_ {
  89                 sha512_ctx_t sha512;
  90                 sha256_ctx_t sha256;
  91                 sha1_ctx_t sha1;
  92                 md5_ctx_t md5;
  93         } context;
  94         uint8_t *hash_value;
  95         void FAST_FUNC (*update)(void*, const void*, size_t);
  96         void FAST_FUNC (*final)(void*, void*);
  97         char hash_algo;
  98
  99         src_fd = open_or_warn_stdin(filename);
 100         if (src_fd < 0) {
 101                 return NULL;
 102         }
 103
 104         hash_algo = applet_name[3];
 105
 106         /* figure specific hash algorithms */
 107         if (ENABLE_MD5SUM && hash_algo == HASH_MD5) {
 108                 md5_begin(&context.md5);
 109                 update = (void*)md5_hash;
 110                 final = (void*)md5_end;
 111                 hash_len = 16;
 112         } else if (ENABLE_SHA1SUM && hash_algo == HASH_SHA1) {
 113                 sha1_begin(&context.sha1);
 114                 update = (void*)sha1_hash;
 115                 final = (void*)sha1_end;
 116                 hash_len = 20;
 117         } else if (ENABLE_SHA256SUM && hash_algo == HASH_SHA256) {
 118                 sha256_begin(&context.sha256);
 119                 update = (void*)sha256_hash;
 120                 final = (void*)sha256_end;
 121                 hash_len = 32;
 122         } else if (ENABLE_SHA512SUM && hash_algo == HASH_SHA512) {
 123                 sha512_begin(&context.sha512);
 124                 update = (void*)sha512_hash;
 125                 final = (void*)sha512_end;
 126                 hash_len = 64;
 127         } else {
 128                 xfunc_die(); /* can't reach this */
 129         }
 130
 131         {
 132                 RESERVE_CONFIG_UBUFFER(in_buf, 4096);
 133                 while ((count = safe_read(src_fd, in_buf, 4096)) > 0) {
 134                         update(&context, in_buf, count);
 135                 }
 136                 hash_value = NULL;
 137                 if (count == 0) {
 138                         final(&context, in_buf);
 139                         hash_value = hash_bin_to_hex(in_buf, hash_len);
 140                 }
 141                 RELEASE_CONFIG_BUFFER(in_buf);
 142         }
 143
 144         if (src_fd != STDIN_FILENO) {
 145                 close(src_fd);
 146         }
 147
 148         return hash_value;
 149 }
 150
 151 int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 152 int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
 153 {
 154         int return_value = EXIT_SUCCESS;
 155         unsigned flags;
 156
 157         if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK) {
 158                 /* -b "binary", -t "text" are ignored (shaNNNsum compat) */
 159                 flags = getopt32(argv, "scwbt");
 160                 argv += optind;
 161                 //argc -= optind;
 162         } else {
 163                 argv += 1;
 164                 //argc -= 1;
 165         }
 166         if (!*argv)
 167                 *--argv = (char*)"-";
 168
 169         if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && !(flags & FLAG_CHECK)) {
 170                 if (flags & FLAG_SILENT) {
 171                         bb_error_msg_and_die("-%c is meaningful only with -c", 's');
 172                 }
 173                 if (flags & FLAG_WARN) {
 174                         bb_error_msg_and_die("-%c is meaningful only with -c", 'w');
 175                 }
 176         }
 177
 178         do {
 179                 if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
 180                         FILE *pre_computed_stream;
 181                         char *line;
 182                         int count_total = 0;
 183                         int count_failed = 0;
 184
 185                         pre_computed_stream = xfopen_stdin(*argv);
 186
 187                         while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) {
 188                                 uint8_t *hash_value;
 189                                 char *filename_ptr;
 190
 191                                 count_total++;
 192                                 filename_ptr = strstr(line, "  ");
 193                                 /* handle format for binary checksums */
 194                                 if (filename_ptr == NULL) {
 195                                         filename_ptr = strstr(line, " *");
 196                                 }
 197                                 if (filename_ptr == NULL) {
 198                                         if (flags & FLAG_WARN) {
 199                                                 bb_error_msg("invalid format");
 200                                         }
 201                                         count_failed++;
 202                                         return_value = EXIT_FAILURE;
 203                                         free(line);
 204                                         continue;
 205                                 }
 206                                 *filename_ptr = '\0';
 207                                 filename_ptr += 2;
 208
 209                                 hash_value = hash_file(filename_ptr);
 210
 211                                 if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
 212                                         if (!(flags & FLAG_SILENT))
 213                                                 printf("%s: OK\n", filename_ptr);
 214                                 } else {
 215                                         if (!(flags & FLAG_SILENT))
 216                                                 printf("%s: FAILED\n", filename_ptr);
 217                                         count_failed++;
 218                                         return_value = EXIT_FAILURE;
 219                                 }
 220                                 /* possible free(NULL) */
 221                                 free(hash_value);
 222                                 free(line);
 223                         }
 224                         if (count_failed && !(flags & FLAG_SILENT)) {
 225                                 bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
 226                                                          count_failed, count_total);
 227                         }
 228                         fclose_if_not_stdin(pre_computed_stream);
 229                 } else {
 230                         uint8_t *hash_value = hash_file(*argv);
 231                         if (hash_value == NULL) {
 232                                 return_value = EXIT_FAILURE;
 233                         } else {
 234                                 printf("%s  %s\n", hash_value, *argv);
 235                                 free(hash_value);
 236                         }
 237                 }
 238         } while (*++argv);
 239
 240         return return_value;
 241 }