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/* $OpenBSD: md5.c,v 1.98 2023/10/31 19:37:17 millert Exp $ */
/*
* Copyright (c) 2001,2003,2005-2007,2010,2013,2014
* Todd C. Miller <millert@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/queue.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <resolv.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <time.h>
#include <unistd.h>
#include <errno.h>
#include <md5.h>
#include <rmd160.h>
#include <sha1.h>
#include <sha2.h>
#include <crc.h>
#define STYLE_MD5 0
#define STYLE_CKSUM 1
#define STYLE_TERSE 2
#define MAX_DIGEST_LEN 128
#define MINIMUM(a, b) (((a) < (b)) ? (a) : (b))
#define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b))
union ANY_CTX {
#if !defined(SHA2_ONLY)
CKSUM_CTX cksum;
MD5_CTX md5;
RMD160_CTX rmd160;
SHA1_CTX sha1;
#endif /* !defined(SHA2_ONLY) */
SHA2_CTX sha2;
};
struct hash_function {
const char *name;
size_t digestlen;
int style;
int base64;
void *ctx; /* XXX - only used by digest_file() */
void (*init)(void *);
void (*update)(void *, const unsigned char *, size_t);
void (*final)(unsigned char *, void *);
char * (*end)(void *, char *);
TAILQ_ENTRY(hash_function) tailq;
} functions[] = {
#if !defined(SHA2_ONLY)
{
"CKSUM",
CKSUM_DIGEST_LENGTH,
STYLE_CKSUM,
-1,
NULL,
(void (*)(void *))CKSUM_Init,
(void (*)(void *, const unsigned char *, size_t))CKSUM_Update,
(void (*)(unsigned char *, void *))CKSUM_Final,
(char *(*)(void *, char *))CKSUM_End
},
{
"MD5",
MD5_DIGEST_LENGTH,
STYLE_MD5,
0,
NULL,
(void (*)(void *))MD5Init,
(void (*)(void *, const unsigned char *, size_t))MD5Update,
(void (*)(unsigned char *, void *))MD5Final,
(char *(*)(void *, char *))MD5End
},
{
"RMD160",
RMD160_DIGEST_LENGTH,
STYLE_MD5,
0,
NULL,
(void (*)(void *))RMD160Init,
(void (*)(void *, const unsigned char *, size_t))RMD160Update,
(void (*)(unsigned char *, void *))RMD160Final,
(char *(*)(void *, char *))RMD160End
},
{
"SHA1",
SHA1_DIGEST_LENGTH,
STYLE_MD5,
0,
NULL,
(void (*)(void *))SHA1Init,
(void (*)(void *, const unsigned char *, size_t))SHA1Update,
(void (*)(unsigned char *, void *))SHA1Final,
(char *(*)(void *, char *))SHA1End
},
{
"SHA224",
SHA224_DIGEST_LENGTH,
STYLE_MD5,
0,
NULL,
(void (*)(void *))SHA224Init,
(void (*)(void *, const unsigned char *, size_t))SHA224Update,
(void (*)(unsigned char *, void *))SHA224Final,
(char *(*)(void *, char *))SHA224End
},
#endif /* !defined(SHA2_ONLY) */
{
"SHA256",
SHA256_DIGEST_LENGTH,
STYLE_MD5,
0,
NULL,
(void (*)(void *))SHA256Init,
(void (*)(void *, const unsigned char *, size_t))SHA256Update,
(void (*)(unsigned char *, void *))SHA256Final,
(char *(*)(void *, char *))SHA256End
},
#if !defined(SHA2_ONLY)
{
"SHA384",
SHA384_DIGEST_LENGTH,
STYLE_MD5,
0,
NULL,
(void (*)(void *))SHA384Init,
(void (*)(void *, const unsigned char *, size_t))SHA384Update,
(void (*)(unsigned char *, void *))SHA384Final,
(char *(*)(void *, char *))SHA384End
},
{
"SHA512/256",
SHA512_256_DIGEST_LENGTH,
STYLE_MD5,
0,
NULL,
(void (*)(void *))SHA512_256Init,
(void (*)(void *, const unsigned char *, size_t))SHA512_256Update,
(void (*)(unsigned char *, void *))SHA512_256Final,
(char *(*)(void *, char *))SHA512_256End
},
#endif /* !defined(SHA2_ONLY) */
{
"SHA512",
SHA512_DIGEST_LENGTH,
STYLE_MD5,
0,
NULL,
(void (*)(void *))SHA512Init,
(void (*)(void *, const unsigned char *, size_t))SHA512Update,
(void (*)(unsigned char *, void *))SHA512Final,
(char *(*)(void *, char *))SHA512End
},
{
NULL,
}
};
TAILQ_HEAD(hash_list, hash_function);
void digest_end(const struct hash_function *, void *, char *, size_t, int);
int digest_file(const char *, struct hash_list *, int);
void digest_print(const struct hash_function *, const char *, const char *);
#if !defined(SHA2_ONLY)
int digest_filelist(const char *, struct hash_function *, int, char **);
void digest_printstr(const struct hash_function *, const char *, const char *);
void digest_string(char *, struct hash_list *);
void digest_test(struct hash_list *);
void digest_time(struct hash_list *, int);
#endif /* !defined(SHA2_ONLY) */
void hash_insert(struct hash_list *, struct hash_function *, int);
void usage(void) __attribute__((__noreturn__));
extern char *__progname;
int qflag = 0;
FILE *ofile = NULL;
int
main(int argc, char **argv)
{
struct hash_function *hf, *hftmp;
struct hash_list hl;
size_t len;
char *cp, *input_string, *selective_checklist;
const char *optstr;
int fl, error, base64;
int bflag, cflag, pflag, rflag, tflag, xflag;
if (pledge("stdio rpath wpath cpath", NULL) == -1)
err(1, "pledge");
TAILQ_INIT(&hl);
input_string = NULL;
selective_checklist = NULL;
error = bflag = cflag = pflag = qflag = rflag = tflag = xflag = 0;
#if !defined(SHA2_ONLY)
if (strcmp(__progname, "cksum") == 0)
optstr = "a:bC:ch:pqrs:tx";
else
#endif /* !defined(SHA2_ONLY) */
optstr = "bC:ch:pqrs:tx";
/* Check for -b option early since it changes behavior. */
while ((fl = getopt(argc, argv, optstr)) != -1) {
switch (fl) {
case 'b':
bflag = 1;
break;
case '?':
usage();
}
}
optind = 1;
optreset = 1;
while ((fl = getopt(argc, argv, optstr)) != -1) {
switch (fl) {
case 'a':
while ((cp = strsep(&optarg, " \t,")) != NULL) {
if (*cp == '\0')
continue;
base64 = -1;
for (hf = functions; hf->name != NULL; hf++) {
len = strlen(hf->name);
if (strncasecmp(cp, hf->name, len) != 0)
continue;
if (cp[len] == '\0') {
if (hf->base64 != -1)
base64 = bflag;
break; /* exact match */
}
if (cp[len + 1] == '\0' &&
(cp[len] == 'b' || cp[len] == 'x')) {
base64 =
cp[len] == 'b' ? 1 : 0;
break; /* match w/ suffix */
}
}
if (hf->name == NULL) {
warnx("unknown algorithm \"%s\"", cp);
usage();
}
if (hf->base64 == -1 && base64 != -1) {
warnx("%s doesn't support %s",
hf->name,
base64 ? "base64" : "hex");
usage();
}
/* Check for dupes. */
TAILQ_FOREACH(hftmp, &hl, tailq) {
if (hftmp->base64 == base64 &&
strcmp(hf->name, hftmp->name) == 0)
break;
}
if (hftmp == NULL)
hash_insert(&hl, hf, base64);
}
break;
case 'b':
/* has already been parsed */
break;
case 'h':
ofile = fopen(optarg, "w");
if (ofile == NULL)
err(1, "%s", optarg);
break;
#if !defined(SHA2_ONLY)
case 'C':
selective_checklist = optarg;
break;
case 'c':
cflag = 1;
break;
#endif /* !defined(SHA2_ONLY) */
case 'p':
pflag = 1;
break;
case 'q':
qflag = 1;
break;
case 'r':
rflag = 1;
break;
case 's':
input_string = optarg;
break;
case 't':
tflag++;
break;
case 'x':
xflag = 1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (ofile == NULL)
ofile = stdout;
if (pledge("stdio rpath", NULL) == -1)
err(1, "pledge");
/* Most arguments are mutually exclusive */
fl = pflag + (tflag ? 1 : 0) + xflag + cflag + (input_string != NULL);
if (fl > 1 || (fl && argc && cflag == 0) || (rflag && qflag) ||
(selective_checklist != NULL && argc == 0))
usage();
if (selective_checklist || cflag) {
if (TAILQ_FIRST(&hl) != TAILQ_LAST(&hl, hash_list))
errx(1, "only a single algorithm may be specified "
"in -C or -c mode");
}
/* No algorithm specified, check the name we were called as. */
if (TAILQ_EMPTY(&hl)) {
for (hf = functions; hf->name != NULL; hf++) {
if (strcasecmp(hf->name, __progname) == 0)
break;
}
if (hf->name == NULL)
hf = &functions[0]; /* default to cksum */
hash_insert(&hl, hf, (hf->base64 == -1 ? 0 : bflag));
}
if ((rflag || qflag) && !cflag) {
const int new_style = rflag ? STYLE_CKSUM : STYLE_TERSE;
TAILQ_FOREACH(hf, &hl, tailq) {
hf->style = new_style;
}
}
#if !defined(SHA2_ONLY)
if (tflag)
digest_time(&hl, tflag);
else if (xflag)
digest_test(&hl);
else if (input_string)
digest_string(input_string, &hl);
else if (selective_checklist) {
int i;
error = digest_filelist(selective_checklist, TAILQ_FIRST(&hl),
argc, argv);
for (i = 0; i < argc; i++) {
if (argv[i] != NULL) {
warnx("%s does not exist in %s", argv[i],
selective_checklist);
error++;
}
}
} else if (cflag) {
if (argc == 0)
error = digest_filelist("-", TAILQ_FIRST(&hl), 0, NULL);
else
while (argc--)
error += digest_filelist(*argv++,
TAILQ_FIRST(&hl), 0, NULL);
} else
#endif /* !defined(SHA2_ONLY) */
if (pflag || argc == 0)
error = digest_file("-", &hl, pflag);
else
while (argc--)
error += digest_file(*argv++, &hl, 0);
return(error ? EXIT_FAILURE : EXIT_SUCCESS);
}
void
hash_insert(struct hash_list *hl, struct hash_function *hf, int base64)
{
struct hash_function *hftmp;
hftmp = malloc(sizeof(*hftmp));
if (hftmp == NULL)
err(1, NULL);
*hftmp = *hf;
hftmp->base64 = base64;
TAILQ_INSERT_TAIL(hl, hftmp, tailq);
}
void
digest_end(const struct hash_function *hf, void *ctx, char *buf, size_t bsize,
int base64)
{
u_char *digest;
if (base64 == 1) {
if ((digest = malloc(hf->digestlen)) == NULL)
err(1, NULL);
hf->final(digest, ctx);
if (b64_ntop(digest, hf->digestlen, buf, bsize) == -1)
errx(1, "error encoding base64");
free(digest);
} else {
hf->end(ctx, buf);
}
}
#if !defined(SHA2_ONLY)
void
digest_string(char *string, struct hash_list *hl)
{
struct hash_function *hf;
char digest[MAX_DIGEST_LEN + 1];
union ANY_CTX context;
TAILQ_FOREACH(hf, hl, tailq) {
hf->init(&context);
hf->update(&context, string, strlen(string));
digest_end(hf, &context, digest, sizeof(digest),
hf->base64);
digest_printstr(hf, string, digest);
}
}
#endif /* !defined(SHA2_ONLY) */
void
digest_print(const struct hash_function *hf, const char *what,
const char *digest)
{
switch (hf->style) {
case STYLE_MD5:
(void)fprintf(ofile, "%s (%s) = %s\n", hf->name, what, digest);
break;
case STYLE_CKSUM:
(void)fprintf(ofile, "%s %s\n", digest, what);
break;
case STYLE_TERSE:
(void)fprintf(ofile, "%s\n", digest);
break;
}
}
#if !defined(SHA2_ONLY)
void
digest_printstr(const struct hash_function *hf, const char *what,
const char *digest)
{
switch (hf->style) {
case STYLE_MD5:
(void)fprintf(ofile, "%s (\"%s\") = %s\n", hf->name, what, digest);
break;
case STYLE_CKSUM:
(void)fprintf(ofile, "%s %s\n", digest, what);
break;
case STYLE_TERSE:
(void)fprintf(ofile, "%s\n", digest);
break;
}
}
#endif /* !defined(SHA2_ONLY) */
int
digest_file(const char *file, struct hash_list *hl, int echo)
{
struct hash_function *hf;
FILE *fp;
size_t nread;
u_char data[32 * 1024];
char digest[MAX_DIGEST_LEN + 1];
if (strcmp(file, "-") == 0)
fp = stdin;
else if ((fp = fopen(file, "r")) == NULL) {
warn("cannot open %s", file);
return(1);
}
TAILQ_FOREACH(hf, hl, tailq) {
if ((hf->ctx = malloc(sizeof(union ANY_CTX))) == NULL)
err(1, NULL);
hf->init(hf->ctx);
}
while ((nread = fread(data, 1UL, sizeof(data), fp)) != 0) {
if (echo) {
(void)fwrite(data, nread, 1UL, stdout);
(void)fflush(stdout);
if (ferror(stdout))
err(1, "stdout: write error");
}
TAILQ_FOREACH(hf, hl, tailq)
hf->update(hf->ctx, data, nread);
}
if (ferror(fp)) {
warn("%s: read error", file);
if (fp != stdin)
fclose(fp);
TAILQ_FOREACH(hf, hl, tailq) {
free(hf->ctx);
hf->ctx = NULL;
}
return(1);
}
if (fp != stdin)
fclose(fp);
TAILQ_FOREACH(hf, hl, tailq) {
digest_end(hf, hf->ctx, digest, sizeof(digest), hf->base64);
free(hf->ctx);
hf->ctx = NULL;
if (fp == stdin)
fprintf(ofile, "%s\n", digest);
else
digest_print(hf, file, digest);
}
return(0);
}
#if !defined(SHA2_ONLY)
/*
* Parse through the input file looking for valid lines.
* If one is found, use this checksum and file as a reference and
* generate a new checksum against the file on the filesystem.
* Print out the result of each comparison.
*/
int
digest_filelist(const char *file, struct hash_function *defhash, int selcount,
char **sel)
{
int found, base64, error, cmp, i;
size_t algorithm_max, algorithm_min;
const char *algorithm;
char *filename, *checksum, *line, *p, *tmpline;
char digest[MAX_DIGEST_LEN + 1];
ssize_t linelen;
FILE *listfp, *fp;
size_t len, linesize, nread;
int *sel_found = NULL;
u_char data[32 * 1024];
union ANY_CTX context;
struct hash_function *hf;
if (strcmp(file, "-") == 0) {
listfp = stdin;
} else if ((listfp = fopen(file, "r")) == NULL) {
warn("cannot open %s", file);
return(1);
}
if (sel != NULL) {
sel_found = calloc((size_t)selcount, sizeof(*sel_found));
if (sel_found == NULL)
err(1, NULL);
}
algorithm_max = algorithm_min = strlen(functions[0].name);
for (hf = &functions[1]; hf->name != NULL; hf++) {
len = strlen(hf->name);
algorithm_max = MAXIMUM(algorithm_max, len);
algorithm_min = MINIMUM(algorithm_min, len);
}
error = found = 0;
line = NULL;
linesize = 0;
while ((linelen = getline(&line, &linesize, listfp)) != -1) {
tmpline = line;
base64 = 0;
if (line[linelen - 1] == '\n')
line[linelen - 1] = '\0';
while (isspace((unsigned char)*tmpline))
tmpline++;
/*
* Crack the line into an algorithm, filename, and checksum.
* Lines are of the form:
* ALGORITHM (FILENAME) = CHECKSUM
*
* Fallback on GNU form:
* CHECKSUM FILENAME
*/
p = strchr(tmpline, ' ');
if (p != NULL && *(p + 1) == '(') {
/* BSD form */
*p = '\0';
algorithm = tmpline;
len = strlen(algorithm);
if (len > algorithm_max || len < algorithm_min)
continue;
filename = p + 2;
p = strrchr(filename, ')');
if (p == NULL || strncmp(p + 1, " = ", (size_t)3) != 0)
continue;
*p = '\0';
checksum = p + 4;
p = strpbrk(checksum, " \t\r");
if (p != NULL)
*p = '\0';
/*
* Check that the algorithm is one we recognize.
*/
for (hf = functions; hf->name != NULL; hf++) {
if (strcasecmp(algorithm, hf->name) == 0)
break;
}
if (hf->name == NULL || *checksum == '\0')
continue;
} else {
/* could be GNU form */
if ((hf = defhash) == NULL)
continue;
algorithm = hf->name;
checksum = tmpline;
if ((p = strchr(checksum, ' ')) == NULL)
continue;
if (hf->style == STYLE_CKSUM) {
if ((p = strchr(p + 1, ' ')) == NULL)
continue;
}
*p++ = '\0';
while (isspace((unsigned char)*p))
p++;
if (*p == '\0')
continue;
filename = p;
p = strpbrk(filename, "\t\r");
if (p != NULL)
*p = '\0';
}
if (hf->style == STYLE_MD5) {
/*
* Check the length to see if this could be
* a valid digest. If hex, it will be 2x the
* size of the binary data. For base64, we have
* to check both with and without the '=' padding.
*/
len = strlen(checksum);
if (len != hf->digestlen * 2) {
size_t len2;
if (checksum[len - 1] == '=') {
/* use padding */
len2 = 4 * ((hf->digestlen + 2) / 3);
} else {
/* no padding */
len2 = (4 * hf->digestlen + 2) / 3;
}
if (len != len2)
continue;
base64 = 1;
}
}
found = 1;
/*
* If only a selection of files is wanted, proceed only
* if the filename matches one of those in the selection.
*/
if (sel != NULL) {
for (i = 0; i < selcount; i++) {
if (strcmp(sel[i], filename) == 0) {
sel_found[i] = 1;
break;
}
}
if (i == selcount)
continue;
}
if ((fp = fopen(filename, "r")) == NULL) {
warn("cannot open %s", filename);
(void)printf("(%s) %s: %s\n", algorithm, filename,
(errno == ENOENT ? "MISSING" : "FAILED"));
error = 1;
continue;
}
hf->init(&context);
while ((nread = fread(data, 1UL, sizeof(data), fp)) > 0)
hf->update(&context, data, nread);
if (ferror(fp)) {
warn("%s: read error", file);
error = 1;
fclose(fp);
continue;
}
fclose(fp);
digest_end(hf, &context, digest, sizeof(digest), base64);
if (base64)
cmp = strncmp(checksum, digest, len);
else
cmp = strcasecmp(checksum, digest);
if (cmp == 0) {
if (qflag == 0)
(void)printf("(%s) %s: OK\n", algorithm,
filename);
} else {
(void)printf("(%s) %s: FAILED\n", algorithm, filename);
error = 1;
}
}
free(line);
if (ferror(listfp)) {
warn("%s: getline", file);
error = 1;
}
if (listfp != stdin)
fclose(listfp);
if (!found)
warnx("%s: no properly formatted checksum lines found", file);
if (sel_found != NULL) {
/*
* Mark found files by setting them to NULL so that we can
* detect files that are missing from the checklist later.
*/
for (i = 0; i < selcount; i++) {
if (sel_found[i])
sel[i] = NULL;
}
free(sel_found);
}
return(error || !found);
}
#define TEST_BLOCK_LEN 10000
#define TEST_BLOCK_COUNT 10000
void
digest_time(struct hash_list *hl, int times)
{
struct hash_function *hf;
struct rusage start, stop;
struct timeval res;
union ANY_CTX context;
u_int i;
u_char data[TEST_BLOCK_LEN];
char digest[MAX_DIGEST_LEN + 1];
double elapsed;
int count = TEST_BLOCK_COUNT;
while (--times > 0 && count < INT_MAX / 10)
count *= 10;
TAILQ_FOREACH(hf, hl, tailq) {
(void)printf("%s time trial. Processing %d %d-byte blocks...",
hf->name, count, TEST_BLOCK_LEN);
fflush(stdout);
/* Initialize data based on block number. */
for (i = 0; i < TEST_BLOCK_LEN; i++)
data[i] = (u_char)(i & 0xff);
getrusage(RUSAGE_SELF, &start);
hf->init(&context);
for (i = 0; i < count; i++)
hf->update(&context, data, (size_t)TEST_BLOCK_LEN);
digest_end(hf, &context, digest, sizeof(digest), hf->base64);
getrusage(RUSAGE_SELF, &stop);
timersub(&stop.ru_utime, &start.ru_utime, &res);
elapsed = (double)res.tv_sec + (double)res.tv_usec / 1000000.0;
(void)printf("\nDigest = %s\n", digest);
(void)printf("Time = %f seconds\n", elapsed);
(void)printf("Speed = %f bytes/second\n",
(double)TEST_BLOCK_LEN * count / elapsed);
}
}
void
digest_test(struct hash_list *hl)
{
struct hash_function *hf;
union ANY_CTX context;
int i;
char digest[MAX_DIGEST_LEN + 1];
unsigned char buf[1000];
unsigned const char *test_strings[] = {
"",
"a",
"abc",
"message digest",
"abcdefghijklmnopqrstuvwxyz",
"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
"0123456789",
"12345678901234567890123456789012345678901234567890123456789"
"012345678901234567890",
};
TAILQ_FOREACH(hf, hl, tailq) {
(void)printf("%s test suite:\n", hf->name);
for (i = 0; i < 8; i++) {
hf->init(&context);
hf->update(&context, test_strings[i],
strlen(test_strings[i]));
digest_end(hf, &context, digest, sizeof(digest),
hf->base64);
digest_printstr(hf, test_strings[i], digest);
}
/* Now simulate a string of a million 'a' characters. */
memset(buf, 'a', sizeof(buf));
hf->init(&context);
for (i = 0; i < 1000; i++)
hf->update(&context, buf, sizeof(buf));
digest_end(hf, &context, digest, sizeof(digest), hf->base64);
digest_print(hf, "one million 'a' characters",
digest);
}
}
#endif /* !defined(SHA2_ONLY) */
void
usage(void)
{
#if !defined(SHA2_ONLY)
if (strcmp(__progname, "cksum") == 0)
fprintf(stderr, "usage: %s [-bcpqrtx] [-a algorithms] [-C checklist] "
"[-h hashfile]\n"
" [-s string] [file ...]\n",
__progname);
else
#endif /* !defined(SHA2_ONLY) */
fprintf(stderr, "usage:"
"\t%s [-bcpqrtx] [-C checklist] [-h hashfile] [-s string] "
"[file ...]\n",
__progname);
exit(EXIT_FAILURE);
}
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