Adding upstream version 2.33.1.upstream/2.33.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 196 insertions, 0 deletions

diff --git a/misc-utils/mcookie.c b/misc-utils/mcookie.c
new file mode 100644
index 0000000..8598ac3
--- /dev/null
+++ b/misc-utils/mcookie.c
@@ -0,0 +1,196 @@
+/* mcookie.c -- Generates random numbers for xauth
+ * Created: Fri Feb  3 10:42:48 1995 by faith@cs.unc.edu
+ * Revised: Fri Mar 19 07:48:01 1999 by faith@acm.org
+ * Public Domain 1995, 1999 Rickard E. Faith (faith@acm.org)
+ * This program comes with ABSOLUTELY NO WARRANTY.
+ * 
+ * This program gathers some random bits of data and used the MD5
+ * message-digest algorithm to generate a 128-bit hexadecimal number for
+ * use with xauth(1).
+ *
+ * NOTE: Unless /dev/random is available, this program does not actually
+ * gather 128 bits of random information, so the magic cookie generated
+ * will be considerably easier to guess than one might expect.
+ *
+ * 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
+ * - added Native Language Support
+ * 1999-03-21 aeb: Added some fragments of code from Colin Plumb.
+ *
+ */
+
+#include "c.h"
+#include "md5.h"
+#include "nls.h"
+#include "closestream.h"
+#include "randutils.h"
+#include "strutils.h"
+#include "xalloc.h"
+#include "all-io.h"
+
+#include <fcntl.h>
+#include <getopt.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+enum {
+	BUFFERSIZE = 4096,
+	RAND_BYTES = 128
+};
+
+struct mcookie_control {
+	struct	UL_MD5Context ctx;
+	char	**files;
+	size_t	nfiles;
+	uint64_t maxsz;
+
+	unsigned int verbose:1;
+};
+
+/* The basic function to hash a file */
+static uint64_t hash_file(struct mcookie_control *ctl, int fd)
+{
+	unsigned char buf[BUFFERSIZE];
+	uint64_t wanted, count;
+
+	wanted = ctl->maxsz ? ctl->maxsz : sizeof(buf);
+
+	for (count = 0; count < wanted; ) {
+		size_t rdsz = sizeof(buf);
+		ssize_t r;
+
+		if (wanted - count < rdsz)
+			rdsz = wanted - count;
+
+		r = read_all(fd, (char *) buf, rdsz);
+		if (r < 0)
+			break;
+		ul_MD5Update(&ctl->ctx, buf, r);
+		count += r;
+	}
+	/* Separate files with a null byte */
+	buf[0] = '\0';
+	ul_MD5Update(&ctl->ctx, buf, 1);
+	return count;
+}
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+	FILE *out = stdout;
+	fputs(USAGE_HEADER, out);
+	fprintf(out, _(" %s [options]\n"), program_invocation_short_name);
+
+	fputs(USAGE_SEPARATOR, out);
+	fputs(_("Generate magic cookies for xauth.\n"), out);
+
+	fputs(USAGE_OPTIONS, out);
+	fputs(_(" -f, --file <file>     use file as a cookie seed\n"), out);
+	fputs(_(" -m, --max-size <num>  limit how much is read from seed files\n"), out);
+	fputs(_(" -v, --verbose         explain what is being done\n"), out);
+
+	fputs(USAGE_SEPARATOR, out);
+	printf(USAGE_HELP_OPTIONS(23));
+	printf(USAGE_MAN_TAIL("mcookie(1)"));
+
+	exit(EXIT_SUCCESS);
+}
+
+static void randomness_from_files(struct mcookie_control *ctl)
+{
+	size_t i;
+
+	for (i = 0; i < ctl->nfiles; i++) {
+		const char *fname = ctl->files[i];
+		size_t count;
+		int fd;
+
+		if (*fname == '-' && !*(fname + 1))
+			fd = STDIN_FILENO;
+		else
+			fd = open(fname, O_RDONLY);
+
+		if (fd < 0) {
+			warn(_("cannot open %s"), fname);
+		} else {
+			count = hash_file(ctl, fd);
+			if (ctl->verbose)
+				fprintf(stderr,
+					P_("Got %zu byte from %s\n",
+					   "Got %zu bytes from %s\n", count),
+					count, fname);
+
+			if (fd != STDIN_FILENO && close(fd))
+				err(EXIT_FAILURE, _("closing %s failed"), fname);
+		}
+	}
+}
+
+int main(int argc, char **argv)
+{
+	struct mcookie_control ctl = { .verbose = 0 };
+	size_t i;
+	unsigned char digest[UL_MD5LENGTH];
+	unsigned char buf[RAND_BYTES];
+	int c;
+
+	static const struct option longopts[] = {
+		{"file", required_argument, NULL, 'f'},
+		{"max-size", required_argument, NULL, 'm'},
+		{"verbose", no_argument, NULL, 'v'},
+		{"version", no_argument, NULL, 'V'},
+		{"help", no_argument, NULL, 'h'},
+		{NULL, 0, NULL, 0}
+	};
+
+	setlocale(LC_ALL, "");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+	atexit(close_stdout);
+
+	while ((c = getopt_long(argc, argv, "f:m:vVh", longopts, NULL)) != -1) {
+		switch (c) {
+		case 'v':
+			ctl.verbose = 1;
+			break;
+		case 'f':
+			if (!ctl.files)
+				ctl.files = xmalloc(sizeof(char *) * argc);
+			ctl.files[ctl.nfiles++] = optarg;
+			break;
+		case 'm':
+			ctl.maxsz = strtosize_or_err(optarg,
+						     _("failed to parse length"));
+			break;
+		case 'V':
+			printf(UTIL_LINUX_VERSION);
+			return EXIT_SUCCESS;
+		case 'h':
+			usage();
+		default:
+			errtryhelp(EXIT_FAILURE);
+		}
+	}
+
+	if (ctl.maxsz && ctl.nfiles == 0)
+		warnx(_("--max-size ignored when used without --file"));
+
+	ul_MD5Init(&ctl.ctx);
+	randomness_from_files(&ctl);
+	free(ctl.files);
+
+	random_get_bytes(&buf, RAND_BYTES);
+	ul_MD5Update(&ctl.ctx, buf, RAND_BYTES);
+	if (ctl.verbose)
+		fprintf(stderr, P_("Got %d byte from %s\n",
+				   "Got %d bytes from %s\n", RAND_BYTES),
+				RAND_BYTES, random_tell_source());
+
+	ul_MD5Final(digest, &ctl.ctx);
+	for (i = 0; i < UL_MD5LENGTH; i++)
+		printf("%02x", digest[i]);
+	putchar('\n');
+
+	return EXIT_SUCCESS;
+}