busybox/coreutils/md5_sha1_sum.c
Denis Vlasenko 62a90cdd74 *: shrink by using [f]open_or_warn_stdin where appropriate
function                                             old     new   delta
lsattr_main                                           62     143     +81
open_or_warn_stdin                                     -      36     +36
fclose_if_not_stdin                                   20      47     +27
xfopen_stdin                                           -      20     +20
tac_main                                             336     356     +20
cksum_main                                           249     259     +10
bb_argv_dash                                           -       8      +8
su_main                                              448     455      +7
cmp_main                                             630     633      +3
passwd_main                                         1072    1074      +2
uudecode_main                                        317     315      -2
text_yank                                            110     108      -2
handle_incoming_and_exit                            2653    2651      -2
flags                                                  5       1      -4
write_leases                                         235     230      -5
fopen_or_warn_stdin                                   48      42      -6
fold_main                                            648     642      -6
static.argv_dash                                       8       -      -8
sum_main                                             142     128     -14
tail_main                                           1237    1221     -16
sed_main                                             711     695     -16
cmp_xfopen_input                                      17       -     -17
bb_cat                                               113      96     -17
catv_main                                            328     306     -22
strings_main                                         457     434     -23
hash_file                                            298     274     -24
sum_file                                             353     325     -28
sort_main                                            904     859     -45
expand_main                                          736     686     -50
cut_main                                            1116    1065     -51
md5_sha1_sum_main                                    549     493     -56
lsattr_args                                           90       -     -90
read_stduu                                           408     255    -153
------------------------------------------------------------------------------
(add/remove: 3/3 grow/shrink: 7/20 up/down: 214/-657)        Total: -443 bytes
   text    data     bss     dec     hex filename
 797417     658    7428  805503   c4a7f busybox_old
 796973     658    7428  805059   c48c3 busybox_unstripped
2008-03-17 09:07:36 +00:00

176 lines
4.3 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2003 Glenn L. McGrath
* Copyright (C) 2003-2004 Erik Andersen
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
#include "libbb.h"
typedef enum { HASH_SHA1, HASH_MD5 } hash_algo_t;
#define FLAG_SILENT 1
#define FLAG_CHECK 2
#define FLAG_WARN 4
/* This might be useful elsewhere */
static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
unsigned hash_length)
{
/* xzalloc zero-terminates */
char *hex_value = xzalloc((hash_length * 2) + 1);
bin2hex(hex_value, (char*)hash_value, hash_length);
return hex_value;
}
static uint8_t *hash_file(const char *filename, hash_algo_t hash_algo)
{
int src_fd, hash_len, count;
union _ctx_ {
sha1_ctx_t sha1;
md5_ctx_t md5;
} context;
uint8_t *hash_value = NULL;
RESERVE_CONFIG_UBUFFER(in_buf, 4096);
void (*update)(const void*, size_t, void*);
void (*final)(void*, void*);
src_fd = open_or_warn_stdin(filename);
if (src_fd < 0) {
return NULL;
}
/* figure specific hash algorithims */
if (ENABLE_MD5SUM && hash_algo==HASH_MD5) {
md5_begin(&context.md5);
update = (void (*)(const void*, size_t, void*))md5_hash;
final = (void (*)(void*, void*))md5_end;
hash_len = 16;
} else if (ENABLE_SHA1SUM && hash_algo==HASH_SHA1) {
sha1_begin(&context.sha1);
update = (void (*)(const void*, size_t, void*))sha1_hash;
final = (void (*)(void*, void*))sha1_end;
hash_len = 20;
} else {
bb_error_msg_and_die("algorithm not supported");
}
while (0 < (count = safe_read(src_fd, in_buf, 4096))) {
update(in_buf, count, &context);
}
if (count == 0) {
final(in_buf, &context);
hash_value = hash_bin_to_hex(in_buf, hash_len);
}
RELEASE_CONFIG_BUFFER(in_buf);
if (src_fd != STDIN_FILENO) {
close(src_fd);
}
return hash_value;
}
int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int md5_sha1_sum_main(int argc ATTRIBUTE_UNUSED, char **argv)
{
int return_value = EXIT_SUCCESS;
uint8_t *hash_value;
unsigned flags;
hash_algo_t hash_algo = ENABLE_MD5SUM
? (ENABLE_SHA1SUM ? (applet_name[0] == 'm' ? HASH_MD5 : HASH_SHA1) : HASH_MD5)
: HASH_SHA1;
if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK)
flags = getopt32(argv, "scw");
else optind = 1;
argv += optind;
//argc -= optind;
if (!*argv)
*--argv = (char*)"-";
if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && !(flags & FLAG_CHECK)) {
if (flags & FLAG_SILENT) {
bb_error_msg_and_die
("-%c is meaningful only when verifying checksums", 's');
} else if (flags & FLAG_WARN) {
bb_error_msg_and_die
("-%c is meaningful only when verifying checksums", 'w');
}
}
if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && (flags & FLAG_CHECK)) {
FILE *pre_computed_stream;
int count_total = 0;
int count_failed = 0;
char *line;
if (argv[1]) {
bb_error_msg_and_die
("only one argument may be specified when using -c");
}
pre_computed_stream = xfopen_stdin(argv[0]);
while ((line = xmalloc_getline(pre_computed_stream)) != NULL) {
char *filename_ptr;
count_total++;
filename_ptr = strstr(line, " ");
/* handle format for binary checksums */
if (filename_ptr == NULL) {
filename_ptr = strstr(line, " *");
}
if (filename_ptr == NULL) {
if (flags & FLAG_WARN) {
bb_error_msg("invalid format");
}
count_failed++;
return_value = EXIT_FAILURE;
free(line);
continue;
}
*filename_ptr = '\0';
filename_ptr += 2;
hash_value = hash_file(filename_ptr, hash_algo);
if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
if (!(flags & FLAG_SILENT))
printf("%s: OK\n", filename_ptr);
} else {
if (!(flags & FLAG_SILENT))
printf("%s: FAILED\n", filename_ptr);
count_failed++;
return_value = EXIT_FAILURE;
}
/* possible free(NULL) */
free(hash_value);
free(line);
}
if (count_failed && !(flags & FLAG_SILENT)) {
bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
count_failed, count_total);
}
/*
if (fclose_if_not_stdin(pre_computed_stream) == EOF) {
bb_perror_msg_and_die("cannot close file %s", file_ptr);
}
*/
} else {
do {
hash_value = hash_file(*argv, hash_algo);
if (hash_value == NULL) {
return_value = EXIT_FAILURE;
} else {
printf("%s %s\n", hash_value, *argv);
free(hash_value);
}
} while (*++argv);
}
return return_value;
}