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:       "[FILE]..."
  11 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: md5sum -c [-sw] [FILE]")
  12 //usage:#define md5sum_full_usage "\n\n"
  13 //usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " MD5 checksums"
  14 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
  15 //usage:     "\nOptions:"
  16 //usage:     "\n        -c      Check sums against given list"
  17 //usage:     "\n        -s      Don't output anything, status code shows success"
  18 //usage:     "\n        -w      Warn about improperly formatted checksum lines"
  19 //usage:        )
  20 //usage:
  21 //usage:#define md5sum_example_usage
  22 //usage:       "$ md5sum < busybox\n"
  23 //usage:       "6fd11e98b98a58f64ff3398d7b324003\n"
  24 //usage:       "$ md5sum busybox\n"
  25 //usage:       "6fd11e98b98a58f64ff3398d7b324003  busybox\n"
  26 //usage:       "$ md5sum -c -\n"
  27 //usage:       "6fd11e98b98a58f64ff3398d7b324003  busybox\n"
  28 //usage:       "busybox: OK\n"
  29 //usage:       "^D\n"
  30 //usage:
  31 //usage:#define sha1sum_trivial_usage
  32 //usage:       "[FILE]..."
  33 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: sha1sum -c [-sw] [FILE]")
  34 //usage:#define sha1sum_full_usage "\n\n"
  35 //usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA1 checksums"
  36 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
  37 //usage:     "\nOptions:"
  38 //usage:     "\n        -c      Check sums against given list"
  39 //usage:     "\n        -s      Don't output anything, status code shows success"
  40 //usage:     "\n        -w      Warn about improperly formatted checksum lines"
  41 //usage:        )
  42 //usage:
  43 //usage:#define sha256sum_trivial_usage
  44 //usage:       "[FILE]..."
  45 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: sha256sum -c [-sw] [FILE]")
  46 //usage:#define sha256sum_full_usage "\n\n"
  47 //usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA256 checksums"
  48 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
  49 //usage:     "\nOptions:"
  50 //usage:     "\n        -c      Check sums against given list"
  51 //usage:     "\n        -s      Don't output anything, status code shows success"
  52 //usage:     "\n        -w      Warn about improperly formatted checksum lines"
  53 //usage:        )
  54 //usage:
  55 //usage:#define sha512sum_trivial_usage
  56 //usage:       "[FILE]..."
  57 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: sha512sum -c [-sw] [FILE]")
  58 //usage:#define sha512sum_full_usage "\n\n"
  59 //usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA512 checksums"
  60 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
  61 //usage:     "\nOptions:"
  62 //usage:     "\n        -c      Check sums against given list"
  63 //usage:     "\n        -s      Don't output anything, status code shows success"
  64 //usage:     "\n        -w      Warn about improperly formatted checksum lines"
  65 //usage:        )
  66
  67 #include "libbb.h"
  68
  69 /* This is a NOEXEC applet. Be very careful! */
  70
  71 enum {
  72         /* 4th letter of applet_name is... */
  73         HASH_MD5 = 's', /* "md5>s<um" */
  74         HASH_SHA1 = '1',
  75         HASH_SHA256 = '2',
  76         HASH_SHA512 = '5',
  77 };
  78
  79 #define FLAG_SILENT  1
  80 #define FLAG_CHECK   2
  81 #define FLAG_WARN    4
  82
  83 /* This might be useful elsewhere */
  84 static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
  85                                 unsigned hash_length)
  86 {
  87         /* xzalloc zero-terminates */
  88         char *hex_value = xzalloc((hash_length * 2) + 1);
  89         bin2hex(hex_value, (char*)hash_value, hash_length);
  90         return (unsigned char *)hex_value;
  91 }
  92
  93 static uint8_t *hash_file(const char *filename)
  94 {
  95         int src_fd, hash_len, count;
  96         union _ctx_ {
  97                 sha512_ctx_t sha512;
  98                 sha256_ctx_t sha256;
  99                 sha1_ctx_t sha1;
 100                 md5_ctx_t md5;
 101         } context;
 102         uint8_t *hash_value = NULL;
 103         void FAST_FUNC (*update)(void*, const void*, size_t);
 104         void FAST_FUNC (*final)(void*, void*);
 105         char hash_algo;
 106
 107         src_fd = open_or_warn_stdin(filename);
 108         if (src_fd < 0) {
 109                 return NULL;
 110         }
 111
 112         hash_algo = applet_name[3];
 113
 114         /* figure specific hash algorithms */
 115         if (ENABLE_MD5SUM && hash_algo == HASH_MD5) {
 116                 md5_begin(&context.md5);
 117                 update = (void*)md5_hash;
 118                 final = (void*)md5_end;
 119                 hash_len = 16;
 120         } else if (ENABLE_SHA1SUM && hash_algo == HASH_SHA1) {
 121                 sha1_begin(&context.sha1);
 122                 update = (void*)sha1_hash;
 123                 final = (void*)sha1_end;
 124                 hash_len = 20;
 125         } else if (ENABLE_SHA256SUM && hash_algo == HASH_SHA256) {
 126                 sha256_begin(&context.sha256);
 127                 update = (void*)sha256_hash;
 128                 final = (void*)sha256_end;
 129                 hash_len = 32;
 130         } else if (ENABLE_SHA512SUM && hash_algo == HASH_SHA512) {
 131                 sha512_begin(&context.sha512);
 132                 update = (void*)sha512_hash;
 133                 final = (void*)sha512_end;
 134                 hash_len = 64;
 135         } else {
 136                 xfunc_die(); /* can't reach this */
 137         }
 138
 139         {
 140                 RESERVE_CONFIG_UBUFFER(in_buf, 4096);
 141                 while ((count = safe_read(src_fd, in_buf, 4096)) > 0) {
 142                         update(&context, in_buf, count);
 143                 }
 144                 if (count == 0) {
 145                         final(&context, in_buf);
 146                         hash_value = hash_bin_to_hex(in_buf, hash_len);
 147                 }
 148                 RELEASE_CONFIG_BUFFER(in_buf);
 149         }
 150
 151         if (src_fd != STDIN_FILENO) {
 152                 close(src_fd);
 153         }
 154
 155         return hash_value;
 156 }
 157
 158 int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 159 int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
 160 {
 161         int return_value = EXIT_SUCCESS;
 162         unsigned flags;
 163
 164         if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK) {
 165                 /* -b "binary", -t "text" are ignored (shaNNNsum compat) */
 166                 flags = getopt32(argv, "scwbt");
 167                 argv += optind;
 168                 //argc -= optind;
 169         } else {
 170                 argv += 1;
 171                 //argc -= 1;
 172         }
 173         if (!*argv)
 174                 *--argv = (char*)"-";
 175
 176         if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && !(flags & FLAG_CHECK)) {
 177                 if (flags & FLAG_SILENT) {
 178                         bb_error_msg_and_die("-%c is meaningful only with -c", 's');
 179                 }
 180                 if (flags & FLAG_WARN) {
 181                         bb_error_msg_and_die("-%c is meaningful only with -c", 'w');
 182                 }
 183         }
 184
 185         if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
 186                 FILE *pre_computed_stream;
 187                 int count_total = 0;
 188                 int count_failed = 0;
 189                 char *line;
 190
 191                 if (argv[1]) {
 192                         bb_error_msg_and_die("only one argument may be specified with -c");
 193                 }
 194
 195                 pre_computed_stream = xfopen_stdin(argv[0]);
 196
 197                 while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) {
 198                         uint8_t *hash_value;
 199                         char *filename_ptr;
 200
 201                         count_total++;
 202                         filename_ptr = strstr(line, "  ");
 203                         /* handle format for binary checksums */
 204                         if (filename_ptr == NULL) {
 205                                 filename_ptr = strstr(line, " *");
 206                         }
 207                         if (filename_ptr == NULL) {
 208                                 if (flags & FLAG_WARN) {
 209                                         bb_error_msg("invalid format");
 210                                 }
 211                                 count_failed++;
 212                                 return_value = EXIT_FAILURE;
 213                                 free(line);
 214                                 continue;
 215                         }
 216                         *filename_ptr = '\0';
 217                         filename_ptr += 2;
 218
 219                         hash_value = hash_file(filename_ptr);
 220
 221                         if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
 222                                 if (!(flags & FLAG_SILENT))
 223                                         printf("%s: OK\n", filename_ptr);
 224                         } else {
 225                                 if (!(flags & FLAG_SILENT))
 226                                         printf("%s: FAILED\n", filename_ptr);
 227                                 count_failed++;
 228                                 return_value = EXIT_FAILURE;
 229                         }
 230                         /* possible free(NULL) */
 231                         free(hash_value);
 232                         free(line);
 233                 }
 234                 if (count_failed && !(flags & FLAG_SILENT)) {
 235                         bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
 236                                                  count_failed, count_total);
 237                 }
 238                 /*
 239                 if (fclose_if_not_stdin(pre_computed_stream) == EOF) {
 240                         bb_perror_msg_and_die("can't close file %s", file_ptr);
 241                 }
 242                 */
 243         } else {
 244                 do {
 245                         uint8_t *hash_value = hash_file(*argv);
 246                         if (hash_value == NULL) {
 247                                 return_value = EXIT_FAILURE;
 248                         } else {
 249                                 printf("%s  %s\n", hash_value, *argv);
 250                                 free(hash_value);
 251                         }
 252                 } while (*++argv);
 253         }
 254         return return_value;
 255 }