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 //usage:
  59 //usage:#define sha3sum_trivial_usage
  60 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("[-c[sw]] ")"[FILE]..."
  61 //usage:#define sha3sum_full_usage "\n\n"
  62 //usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA3-512 checksums"
  63 //usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
  64 //usage:     "\n        -c      Check sums against list in FILEs"
  65 //usage:     "\n        -s      Don't output anything, status code shows success"
  66 //usage:     "\n        -w      Warn about improperly formatted checksum lines"
  67 //usage:        )
  68
  69 #include "libbb.h"
  70
  71 /* This is a NOEXEC applet. Be very careful! */
  72
  73 enum {
  74         /* 4th letter of applet_name is... */
  75         HASH_MD5 = 's', /* "md5>s<um" */
  76         HASH_SHA1 = '1',
  77         HASH_SHA256 = '2',
  78         HASH_SHA3 = '3',
  79         HASH_SHA512 = '5',
  80 };
  81
  82 #define FLAG_SILENT  1
  83 #define FLAG_CHECK   2
  84 #define FLAG_WARN    4
  85
  86 /* This might be useful elsewhere */
  87 static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
  88                                 unsigned hash_length)
  89 {
  90         /* xzalloc zero-terminates */
  91         char *hex_value = xzalloc((hash_length * 2) + 1);
  92         bin2hex(hex_value, (char*)hash_value, hash_length);
  93         return (unsigned char *)hex_value;
  94 }
  95
  96 static uint8_t *hash_file(const char *filename)
  97 {
  98         int src_fd, hash_len, count;
  99         union _ctx_ {
 100                 sha3_ctx_t sha3;
 101                 sha512_ctx_t sha512;
 102                 sha256_ctx_t sha256;
 103                 sha1_ctx_t sha1;
 104                 md5_ctx_t md5;
 105         } context;
 106         uint8_t *hash_value;
 107         void FAST_FUNC (*update)(void*, const void*, size_t);
 108         void FAST_FUNC (*final)(void*, void*);
 109         char hash_algo;
 110
 111         src_fd = open_or_warn_stdin(filename);
 112         if (src_fd < 0) {
 113                 return NULL;
 114         }
 115
 116         hash_algo = applet_name[3];
 117
 118         /* figure specific hash algorithms */
 119         if (ENABLE_MD5SUM && hash_algo == HASH_MD5) {
 120                 md5_begin(&context.md5);
 121                 update = (void*)md5_hash;
 122                 final = (void*)md5_end;
 123                 hash_len = 16;
 124         } else if (ENABLE_SHA1SUM && hash_algo == HASH_SHA1) {
 125                 sha1_begin(&context.sha1);
 126                 update = (void*)sha1_hash;
 127                 final = (void*)sha1_end;
 128                 hash_len = 20;
 129         } else if (ENABLE_SHA256SUM && hash_algo == HASH_SHA256) {
 130                 sha256_begin(&context.sha256);
 131                 update = (void*)sha256_hash;
 132                 final = (void*)sha256_end;
 133                 hash_len = 32;
 134         } else if (ENABLE_SHA512SUM && hash_algo == HASH_SHA512) {
 135                 sha512_begin(&context.sha512);
 136                 update = (void*)sha512_hash;
 137                 final = (void*)sha512_end;
 138                 hash_len = 64;
 139         } else if (ENABLE_SHA3SUM && hash_algo == HASH_SHA3) {
 140                 sha3_begin(&context.sha3);
 141                 update = (void*)sha3_hash;
 142                 final = (void*)sha3_end;
 143                 hash_len = 64;
 144         } else {
 145                 xfunc_die(); /* can't reach this */
 146         }
 147
 148         {
 149                 RESERVE_CONFIG_UBUFFER(in_buf, 4096);
 150                 while ((count = safe_read(src_fd, in_buf, 4096)) > 0) {
 151                         update(&context, in_buf, count);
 152                 }
 153                 hash_value = NULL;
 154                 if (count < 0)
 155                         bb_perror_msg("can't read '%s'", filename);
 156                 else /* count == 0 */ {
 157                         final(&context, in_buf);
 158                         hash_value = hash_bin_to_hex(in_buf, hash_len);
 159                 }
 160                 RELEASE_CONFIG_BUFFER(in_buf);
 161         }
 162
 163         if (src_fd != STDIN_FILENO) {
 164                 close(src_fd);
 165         }
 166
 167         return hash_value;
 168 }
 169
 170 int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 171 int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
 172 {
 173         int return_value = EXIT_SUCCESS;
 174         unsigned flags;
 175
 176         if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK) {
 177                 /* -b "binary", -t "text" are ignored (shaNNNsum compat) */
 178                 flags = getopt32(argv, "scwbt");
 179                 argv += optind;
 180                 //argc -= optind;
 181         } else {
 182                 argv += 1;
 183                 //argc -= 1;
 184         }
 185         if (!*argv)
 186                 *--argv = (char*)"-";
 187
 188         if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && !(flags & FLAG_CHECK)) {
 189                 if (flags & FLAG_SILENT) {
 190                         bb_error_msg_and_die("-%c is meaningful only with -c", 's');
 191                 }
 192                 if (flags & FLAG_WARN) {
 193                         bb_error_msg_and_die("-%c is meaningful only with -c", 'w');
 194                 }
 195         }
 196
 197         do {
 198                 if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
 199                         FILE *pre_computed_stream;
 200                         char *line;
 201                         int count_total = 0;
 202                         int count_failed = 0;
 203
 204                         pre_computed_stream = xfopen_stdin(*argv);
 205
 206                         while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) {
 207                                 uint8_t *hash_value;
 208                                 char *filename_ptr;
 209
 210                                 count_total++;
 211                                 filename_ptr = strstr(line, "  ");
 212                                 /* handle format for binary checksums */
 213                                 if (filename_ptr == NULL) {
 214                                         filename_ptr = strstr(line, " *");
 215                                 }
 216                                 if (filename_ptr == NULL) {
 217                                         if (flags & FLAG_WARN) {
 218                                                 bb_error_msg("invalid format");
 219                                         }
 220                                         count_failed++;
 221                                         return_value = EXIT_FAILURE;
 222                                         free(line);
 223                                         continue;
 224                                 }
 225                                 *filename_ptr = '\0';
 226                                 filename_ptr += 2;
 227
 228                                 hash_value = hash_file(filename_ptr);
 229
 230                                 if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
 231                                         if (!(flags & FLAG_SILENT))
 232                                                 printf("%s: OK\n", filename_ptr);
 233                                 } else {
 234                                         if (!(flags & FLAG_SILENT))
 235                                                 printf("%s: FAILED\n", filename_ptr);
 236                                         count_failed++;
 237                                         return_value = EXIT_FAILURE;
 238                                 }
 239                                 /* possible free(NULL) */
 240                                 free(hash_value);
 241                                 free(line);
 242                         }
 243                         if (count_failed && !(flags & FLAG_SILENT)) {
 244                                 bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
 245                                                 count_failed, count_total);
 246                         }
 247                         fclose_if_not_stdin(pre_computed_stream);
 248                 } else {
 249                         uint8_t *hash_value = hash_file(*argv);
 250                         if (hash_value == NULL) {
 251                                 return_value = EXIT_FAILURE;
 252                         } else {
 253                                 printf("%s  %s\n", hash_value, *argv);
 254                                 free(hash_value);
 255                         }
 256                 }
 257         } while (*++argv);
 258
 259         return return_value;
 260 }