emo/busybox
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

sha1sum option to compare checksums

Browse Source
This commit is contained in:
Glenn L McGrath 2003-06-08 13:32:12 +00:00
parent a721204ec5
commit 6c43f743a3
2 changed files with 128 additions and 51 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
coreutils/Config.in
View File

@ -342,6 +342,13 @@ config CONFIG_SHA1SUM
help
Compute and check SHA1 message digest
config CONFIG_FEATURE_SHA1SUM_CHECK
bool " Enale -c and -w options"
default n
help
Enabling the -c and -w options allow files to be checked
against pre-calculated hash values.
config CONFIG_SLEEP
bool "sleep (single integer arg with no suffix)"
default n

172
coreutils/sha1sum.c
View File

@ -148,82 +148,152 @@ static char sha1sum_stream(FILE *fd, unsigned int *hashval)
return(EXIT_SUCCESS);
}
static void print_hash(unsigned int *hash_value, unsigned char hash_length, unsigned char *filename)
{
unsigned char x;
for (x = 0; x < hash_length; x++) {
printf("%08x", hash_value[x]);
}
putchar(' ');
putchar(' ');
puts(filename);
}
#define FLAG_SILENT 1
#define FLAG_CHECK 2
#define FLAG_WARN 3
#define FLAG_WARN 4
/* This should become a common function used by sha1sum and md5sum,
* it needs extra functionality first
*/
static unsigned char *hash_bin_to_hex(unsigned int *hash_value, unsigned char hash_length)
{
unsigned char x;
unsigned char *hex_value;
hex_value = xmalloc(hash_length * 8);
for (x = 0; x < hash_length; x++) {
sprintf(&hex_value[x * 8], "%08x", hash_value[x]);
}
return(hex_value);
}
FILE *wfopen_file_or_stdin(const char *file_ptr)
{
FILE *stream;
if ((file_ptr[0] == '-') && (file_ptr[1] == '\0')) {
stream = stdin;
} else {
stream = bb_wfopen(file_ptr, "r");
}
return(stream);
}
/* This could become a common function for md5 as well, by using md5_stream */
extern int authenticate(int argc, char **argv, char (*hash_ptr)(FILE *stream, unsigned int *hashval), const unsigned char hash_length)
{
unsigned int hash_value[hash_length];
unsigned char flags = 0;
int opt;
int return_value;
unsigned int flags;
int return_value = EXIT_SUCCESS;
while ((opt = getopt(argc, argv, "sc:w")) != -1) {
switch (opt) {
case 's': /* Dont output anything, status code shows success */
flags |= FLAG_SILENT;
break;
#if 0
case 'c': /* Check a list of checksums against stored values */
break;
case 'w': /* Warn of bad formatting when checking files */
break;
#ifdef CONFIG_FEATURE_SHA1SUM_CHECK
flags = bb_getopt_ulflags(argc, argv, "scw");
#else
flags = bb_getopt_ulflags(argc, argv, "s");
#endif
default:
bb_show_usage();
#ifdef CONFIG_FEATURE_SHA1SUM_CHECK
if (!(flags & FLAG_CHECK)) {
if (flags & FLAG_SILENT) {
bb_error_msg_and_die("the -s option is meaningful only when verifying checksums");
}
else if (flags & FLAG_WARN) {
bb_error_msg_and_die("the -w option is meaningful only when verifying checksums");
}
}
#endif
if (argc == optind) {
argv[argc++] = "-";
}
return_value = EXIT_SUCCESS;
while (optind < argc) {
FILE *stream;
#ifdef CONFIG_FEATURE_SHA1SUM_CHECK
if (flags & FLAG_CHECK) {
FILE *pre_computed_stream;
int count_total = 0;
int count_failed = 0;
unsigned char *file_ptr = argv[optind];
optind++;
if (optind + 1 != argc) {
bb_error_msg_and_die("only one argument may be specified when using -c");
}
pre_computed_stream = wfopen_file_or_stdin(file_ptr);
while (!feof(pre_computed_stream) && !ferror(pre_computed_stream)) {
FILE *stream;
char *line;
char *line_ptr;
char *hex_value;
if ((file_ptr[0] == '-') && (file_ptr[1] == '\0')) {
stream = stdin;
} else {
stream = bb_wfopen(file_ptr, "r");
line = bb_get_chomped_line_from_file(pre_computed_stream);
if (line == NULL) {
break;
}
count_total++;
line_ptr = strchr(line, ' ');
if (line_ptr == NULL) {
if (flags & FLAG_WARN) {
bb_error_msg("Invalid format");
}
free(line);
continue;
}
*line_ptr = '\0';
line_ptr++;
if ((flags & FLAG_WARN) && (*line_ptr != ' ')) {
bb_error_msg("Invalid format");
free(line);
continue;
}
line_ptr++;
stream = bb_wfopen(line_ptr, "r");
if (hash_ptr(stream, hash_value) == EXIT_FAILURE) {
return_value = EXIT_FAILURE;
}
if (fclose(stream) == EOF) {
bb_perror_msg("Couldnt close file %s", file_ptr);
}
hex_value = hash_bin_to_hex(hash_value, hash_length);
printf("%s: ", line_ptr);
if (strcmp(hex_value, line) != 0) {
puts("FAILED");
count_failed++;
} else {
puts("ok");
}
free(line);
}
if (count_failed) {
bb_error_msg("WARNING: %d of %d computed checksum did NOT match", count_failed, count_total);
}
if (bb_fclose_nonstdin(pre_computed_stream) == EOF) {
bb_perror_msg_and_die("Couldnt close file %s", file_ptr);
}
} else
#endif
while (optind < argc) {
FILE *stream;
unsigned char *file_ptr = argv[optind];
optind++;
stream = wfopen_file_or_stdin(file_ptr);
if (stream == NULL) {
return_value = EXIT_FAILURE;
continue;
}
}
if (hash_ptr(stream, hash_value) == EXIT_FAILURE) {
return_value = EXIT_FAILURE;
}
else if (!flags & FLAG_SILENT) {
print_hash(hash_value, hash_length, file_ptr);
}
if (hash_ptr(stream, hash_value) == EXIT_FAILURE) {
return_value = EXIT_FAILURE;
}
else if (!flags & FLAG_SILENT) {
char *hex_value = hash_bin_to_hex(hash_value, hash_length);
printf("%s %s\n", hex_value, file_ptr);
free(hex_value);
}
if (fclose(stream) == EOF) {
bb_perror_msg("Couldnt close file %s", file_ptr);
return_value = EXIT_FAILURE;
if (bb_fclose_nonstdin(stream) == EOF) {
bb_perror_msg("Couldnt close file %s", file_ptr);
return_value = EXIT_FAILURE;
}
}
}
return(return_value);
}