t7x/deps/libtomcrypt/demos/hashsum.c

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2023-12-06 17:43:39 -05:00
/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
/*
* Written by Daniel Richards <kyhwana@world-net.co.nz> 6/7/2002
* hash.c: This app uses libtomcrypt to hash either stdin or a file
* This file is Public Domain. No rights are reserved.
* Compile with 'gcc hashsum.c -o hashsum -ltomcrypt'
* This example isn't really big enough to warrent splitting into
* more functions ;)
*/
#include <tomcrypt.h>
#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L
#include <libgen.h>
#else
#define basename(x) x
#endif
#if !defined(PATH_MAX) && defined(_MSC_VER)
#include <windows.h>
#define PATH_MAX MAX_PATH
#endif
/* thanks http://stackoverflow.com/a/8198009 */
#define s_base(x) ((x >= '0' && x <= '9') ? '0' : \
(x >= 'a' && x <= 'f') ? 'a' - 10 : \
(x >= 'A' && x <= 'F') ? 'A' - 10 : \
'\255')
#define HEXOF(x) (x - s_base(x))
static char* hashsum;
static void cleanup(void)
{
free(hashsum);
}
static void die(int status)
{
unsigned long w, x;
FILE* o = status == EXIT_SUCCESS ? stdout : stderr;
fprintf(o, "usage: %s -a algorithm [-c] [file...]\n\n", hashsum);
fprintf(o, "\t-c\tCheck the hash(es) of the file(s) written in [file].\n");
fprintf(o, "\t\t(-a not required)\n");
fprintf(o, "\nAlgorithms:\n\t");
w = 0;
for (x = 0; hash_descriptor[x].name != NULL; x++) {
w += fprintf(o, "%-14s", hash_descriptor[x].name);
if (w >= 70) {
fprintf(o, "\n\t");
w = 0;
}
}
if (w != 0) fprintf(o, "\n");
exit(status);
}
static void printf_hex(unsigned char* hash_buffer, unsigned long w)
{
unsigned long x;
for (x = 0; x < w; x++) {
printf("%02x",hash_buffer[x]);
}
}
static void check_file(int argn, int argc, char **argv)
{
int err, failed, invalid;
unsigned char is_buffer[MAXBLOCKSIZE], should_buffer[MAXBLOCKSIZE];
char buf[PATH_MAX + (MAXBLOCKSIZE * 3)];
/* iterate through all files */
while(argn < argc) {
char* s;
FILE* f = fopen(argv[argn], "rb");
if(f == NULL) {
int n = snprintf(buf, sizeof(buf), "%s: %s", hashsum, argv[argn]);
if (n > 0 && n < (int)sizeof(buf))
perror(buf);
else
perror(argv[argn]);
exit(EXIT_FAILURE);
}
failed = 0;
invalid = 0;
/* read the file line by line */
while((s = fgets(buf, sizeof(buf), f)) != NULL)
{
int tries, n;
unsigned long hash_len, w, x;
char* space = strstr(s, " ");
/* skip lines with comments */
if (buf[0] == '#') continue;
if (space == NULL) {
fprintf(stderr, "%s: no properly formatted checksum lines found\n", hashsum);
goto ERR;
}
hash_len = space - s;
hash_len /= 2;
if (hash_len > sizeof(should_buffer)) {
fprintf(stderr, "%s: hash too long\n", hashsum);
goto ERR;
}
/* convert the hex-string back to binary */
for (x = 0; x < hash_len; ++x) {
should_buffer[x] = HEXOF(s[x*2]) << 4 | HEXOF(s[x*2 + 1]);
}
space++;
if (*space != '*') {
fprintf(stderr, "%s: unsupported input mode '%c'\n", hashsum, *space);
goto ERR;
}
space++;
for (n = 0; n < (buf + sizeof(buf)) - space; ++n) {
if(iscntrl((int)space[n])) {
space[n] = '\0';
break;
}
}
/* try all hash algorithms that have the appropriate hash size */
tries = 0;
for (x = 0; hash_descriptor[x].name != NULL; ++x) {
if (hash_descriptor[x].hashsize == hash_len) {
tries++;
w = sizeof(is_buffer);
if ((err = hash_file(x, space, is_buffer, &w)) != CRYPT_OK) {
fprintf(stderr, "%s: File hash error: %s: %s\n", hashsum, space, error_to_string(err));
ERR:
fclose(f);
exit(EXIT_FAILURE);
}
if(XMEMCMP(should_buffer, is_buffer, w) == 0) {
printf("%s: OK\n", space);
break;
}
}
} /* for */
if (hash_descriptor[x].name == NULL) {
if(tries > 0) {
printf("%s: FAILED\n", space);
failed++;
}
else {
invalid++;
}
}
} /* while */
fclose(f);
if(invalid) {
fprintf(stderr, "%s: WARNING: %d %s is improperly formatted\n", hashsum, invalid, invalid > 1?"lines":"line");
}
if(failed) {
fprintf(stderr, "%s: WARNING: %d computed %s did NOT match\n", hashsum, failed, failed > 1?"checksums":"checksum");
}
argn++;
}
exit(EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
int idxs[TAB_SIZE], idx, check, y, z, err, argn;
unsigned long w, x;
unsigned char hash_buffer[MAXBLOCKSIZE];
hashsum = strdup(basename(argv[0]));
atexit(cleanup);
/* You need to register algorithms before using them */
register_all_ciphers();
register_all_hashes();
if (argc > 1 && (strcmp("-h", argv[1]) == 0 || strcmp("--help", argv[1]) == 0)) {
die(EXIT_SUCCESS);
}
if (argc < 3) {
die(EXIT_FAILURE);
}
for (x = 0; x < sizeof(idxs)/sizeof(idxs[0]); ++x) {
idxs[x] = -2;
}
argn = 1;
check = 0;
idx = 0;
while(argn < argc){
if(strcmp("-a", argv[argn]) == 0) {
argn++;
if(argn < argc) {
idxs[idx] = find_hash(argv[argn]);
if (idxs[idx] == -1) {
struct {
const char* is;
const char* should;
} shasum_compat[] =
{
#ifdef LTC_SHA1
{ "1", sha1_desc.name },
#endif
#ifdef LTC_SHA224
{ "224", sha224_desc.name },
#endif
#ifdef LTC_SHA256
{ "256", sha256_desc.name },
#endif
#ifdef LTC_SHA384
{ "384", sha384_desc.name },
#endif
#ifdef LTC_SHA512
{ "512", sha512_desc.name },
#endif
#ifdef LTC_SHA512_224
{ "512224", sha512_224_desc.name },
#endif
#ifdef LTC_SHA512_256
{ "512256", sha512_256_desc.name },
#endif
{ NULL, NULL }
};
for (x = 0; shasum_compat[x].is != NULL; ++x) {
if(XSTRCMP(shasum_compat[x].is, argv[argn]) == 0) {
idxs[idx] = find_hash(shasum_compat[x].should);
break;
}
}
}
if (idxs[idx] == -1) {
fprintf(stderr, "%s: Unrecognized algorithm\n", hashsum);
die(EXIT_FAILURE);
}
idx++;
if ((size_t)idx >= sizeof(idxs)/sizeof(idxs[0])) {
fprintf(stderr, "%s: Too many '-a' options chosen\n", hashsum);
die(EXIT_FAILURE);
}
argn++;
continue;
}
else {
die(EXIT_FAILURE);
}
}
if(strcmp("-c", argv[argn]) == 0) {
check = 1;
argn++;
continue;
}
break;
}
if (check == 1) {
check_file(argn, argc, argv);
}
if (argc == argn) {
w = sizeof(hash_buffer);
if ((err = hash_filehandle(idxs[0], stdin, hash_buffer, &w)) != CRYPT_OK) {
fprintf(stderr, "%s: File hash error: %s\n", hashsum, error_to_string(err));
return EXIT_FAILURE;
} else {
for (x = 0; x < w; x++) {
printf("%02x",hash_buffer[x]);
}
printf(" *-\n");
}
} else {
for (z = argn; z < argc; z++) {
for (y = 0; y < idx; ++y) {
w = sizeof(hash_buffer);
if ((err = hash_file(idxs[y],argv[z],hash_buffer,&w)) != CRYPT_OK) {
fprintf(stderr, "%s: File hash error: %s\n", hashsum, error_to_string(err));
return EXIT_FAILURE;
} else {
printf_hex(hash_buffer, w);
printf(" *%s\n", argv[z]);
}
}
}
}
return EXIT_SUCCESS;
}