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 //FIXME: GNU coreutils 8.25 has no -s option, it has only these two long opts:
  70 // --quiet   don't print OK for each successfully verified file
  71 // --status  don't output anything, status code shows success
  72
  73 #include "libbb.h"
  74
  75 /* This is a NOEXEC applet. Be very careful! */
  76
  77 enum {
  78         /* 4th letter of applet_name is... */
  79         HASH_MD5 = 's', /* "md5>s<um" */
  80         HASH_SHA1 = '1',
  81         HASH_SHA256 = '2',
  82         HASH_SHA3 = '3',
  83         HASH_SHA512 = '5',
  84 };
  85
  86 #define FLAG_SILENT  1
  87 #define FLAG_CHECK   2
  88 #define FLAG_WARN    4
  89
  90 /* This might be useful elsewhere */
  91 static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
  92                                 unsigned hash_length)
  93 {
  94         /* xzalloc zero-terminates */
  95         char *hex_value = xzalloc((hash_length * 2) + 1);
  96         bin2hex(hex_value, (char*)hash_value, hash_length);
  97         return (unsigned char *)hex_value;
  98 }
  99
 100 static uint8_t *hash_file(const char *filename)
 101 {
 102         int src_fd, hash_len, count;
 103         union _ctx_ {
 104                 sha3_ctx_t sha3;
 105                 sha512_ctx_t sha512;
 106                 sha256_ctx_t sha256;
 107                 sha1_ctx_t sha1;
 108                 md5_ctx_t md5;
 109         } context;
 110         uint8_t *hash_value;
 111         void FAST_FUNC (*update)(void*, const void*, size_t);
 112         void FAST_FUNC (*final)(void*, void*);
 113         char hash_algo;
 114
 115         src_fd = open_or_warn_stdin(filename);
 116         if (src_fd < 0) {
 117                 return NULL;
 118         }
 119
 120         hash_algo = applet_name[3];
 121
 122         /* figure specific hash algorithms */
 123         if (ENABLE_MD5SUM && hash_algo == HASH_MD5) {
 124                 md5_begin(&context.md5);
 125                 update = (void*)md5_hash;
 126                 final = (void*)md5_end;
 127                 hash_len = 16;
 128         } else if (ENABLE_SHA1SUM && hash_algo == HASH_SHA1) {
 129                 sha1_begin(&context.sha1);
 130                 update = (void*)sha1_hash;
 131                 final = (void*)sha1_end;
 132                 hash_len = 20;
 133         } else if (ENABLE_SHA256SUM && hash_algo == HASH_SHA256) {
 134                 sha256_begin(&context.sha256);
 135                 update = (void*)sha256_hash;
 136                 final = (void*)sha256_end;
 137                 hash_len = 32;
 138         } else if (ENABLE_SHA512SUM && hash_algo == HASH_SHA512) {
 139                 sha512_begin(&context.sha512);
 140                 update = (void*)sha512_hash;
 141                 final = (void*)sha512_end;
 142                 hash_len = 64;
 143         } else if (ENABLE_SHA3SUM && hash_algo == HASH_SHA3) {
 144                 sha3_begin(&context.sha3);
 145                 update = (void*)sha3_hash;
 146                 final = (void*)sha3_end;
 147                 hash_len = 64;
 148         } else {
 149                 xfunc_die(); /* can't reach this */
 150         }
 151
 152         {
 153                 RESERVE_CONFIG_UBUFFER(in_buf, 4096);
 154                 while ((count = safe_read(src_fd, in_buf, 4096)) > 0) {
 155                         update(&context, in_buf, count);
 156                 }
 157                 hash_value = NULL;
 158                 if (count < 0)
 159                         bb_perror_msg("can't read '%s'", filename);
 160                 else /* count == 0 */ {
 161                         final(&context, in_buf);
 162                         hash_value = hash_bin_to_hex(in_buf, hash_len);
 163                 }
 164                 RELEASE_CONFIG_BUFFER(in_buf);
 165         }
 166
 167         if (src_fd != STDIN_FILENO) {
 168                 close(src_fd);
 169         }
 170
 171         return hash_value;
 172 }
 173
 174 int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 175 int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
 176 {
 177         int return_value = EXIT_SUCCESS;
 178         unsigned flags;
 179
 180         if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK) {
 181                 /* -s and -w require -c */
 182                 opt_complementary = "s?c:w?c";
 183                 /* -b "binary", -t "text" are ignored (shaNNNsum compat) */
 184                 flags = getopt32(argv, "scwbt");
 185                 argv += optind;
 186                 //argc -= optind;
 187         } else {
 188                 argv += 1;
 189                 //argc -= 1;
 190         }
 191         if (!*argv)
 192                 *--argv = (char*)"-";
 193
 194         do {
 195                 if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
 196                         FILE *pre_computed_stream;
 197                         char *line;
 198                         int count_total = 0;
 199                         int count_failed = 0;
 200
 201                         pre_computed_stream = xfopen_stdin(*argv);
 202
 203                         while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) {
 204                                 uint8_t *hash_value;
 205                                 char *filename_ptr;
 206
 207                                 count_total++;
 208                                 filename_ptr = strstr(line, "  ");
 209                                 /* handle format for binary checksums */
 210                                 if (filename_ptr == NULL) {
 211                                         filename_ptr = strstr(line, " *");
 212                                 }
 213                                 if (filename_ptr == NULL) {
 214                                         if (flags & FLAG_WARN) {
 215                                                 bb_error_msg("invalid format");
 216                                         }
 217                                         count_failed++;
 218                                         return_value = EXIT_FAILURE;
 219                                         free(line);
 220                                         continue;
 221                                 }
 222                                 *filename_ptr = '\0';
 223                                 filename_ptr += 2;
 224
 225                                 hash_value = hash_file(filename_ptr);
 226
 227                                 if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
 228                                         if (!(flags & FLAG_SILENT))
 229                                                 printf("%s: OK\n", filename_ptr);
 230                                 } else {
 231                                         if (!(flags & FLAG_SILENT))
 232                                                 printf("%s: FAILED\n", filename_ptr);
 233                                         count_failed++;
 234                                         return_value = EXIT_FAILURE;
 235                                 }
 236                                 /* possible free(NULL) */
 237                                 free(hash_value);
 238                                 free(line);
 239                         }
 240                         if (count_failed && !(flags & FLAG_SILENT)) {
 241                                 bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
 242                                                 count_failed, count_total);
 243                         }
 244                         if (count_total == 0) {
 245                                 return_value = EXIT_FAILURE;
 246                                 /*
 247                                  * md5sum from GNU coreutils 8.25 says:
 248                                  * md5sum: <FILE>: no properly formatted MD5 checksum lines found
 249                                  */
 250                                 bb_error_msg("%s: no checksum lines found", *argv);
 251                         }
 252                         fclose_if_not_stdin(pre_computed_stream);
 253                 } else {
 254                         uint8_t *hash_value = hash_file(*argv);
 255                         if (hash_value == NULL) {
 256                                 return_value = EXIT_FAILURE;
 257                         } else {
 258                                 printf("%s  %s\n", hash_value, *argv);
 259                                 free(hash_value);
 260                         }
 261                 }
 262         } while (*++argv);
 263
 264         return return_value;
 265 }