Import sources from 2011-03-30 iso image

1 files changed, 162 insertions, 0 deletions

diff --git a/sys/src/cmd/auth/convkeys.c b/sys/src/cmd/auth/convkeys.c
new file mode 100755
index 000000000..200c5ef21
--- /dev/null
+++ b/sys/src/cmd/auth/convkeys.c
@@ -0,0 +1,162 @@
+#include <u.h>
+#include <libc.h>
+#include <ctype.h>
+#include <authsrv.h>
+#include <mp.h>
+#include <libsec.h>
+#include <bio.h>
+#include "authcmdlib.h"
+
+char	authkey[DESKEYLEN];
+int	verb;
+int	usepass;
+
+int	convert(char*, char*, int);
+int	dofcrypt(int, char*, char*, int);
+void	usage(void);
+
+void
+main(int argc, char *argv[])
+{
+	Dir *d;
+	char *p, *file, key[DESKEYLEN];
+	int fd, len;
+
+	ARGBEGIN{
+	case 'p':
+		usepass = 1;
+		break;
+	case 'v':
+		verb = 1;
+		break;
+	default:
+		usage();
+	}ARGEND
+
+	if(argc != 1)
+		usage();
+	file = argv[0];
+
+	/* get original key */
+	if(usepass){
+		print("enter password file is encoded with\n");
+		getpass(authkey, nil, 0, 1);
+	} else
+		getauthkey(authkey);
+	if(!verb){
+		print("enter password to reencode with\n");
+		getpass(key, nil, 0, 1);
+	}
+
+	fd = open(file, ORDWR);
+	if(fd < 0)
+		error("can't open %s: %r\n", file);
+	d = dirfstat(fd);
+	if(d == nil)
+		error("can't stat %s: %r\n", file);
+	len = d->length;
+	p = malloc(len);
+	if(!p)
+		error("out of memory");
+	if(read(fd, p, len) != len)
+		error("can't read key file: %r\n");
+	len = convert(p, key, len);
+	if(verb)
+		exits(0);
+	if(pwrite(fd, p, len, 0) != len)
+		error("can't write key file: %r\n");
+	close(fd);
+	exits(0);
+}
+
+void
+randombytes(uchar *p, int len)
+{
+	int i, fd;
+
+	fd = open("/dev/random", OREAD);
+	if(fd < 0){
+		fprint(2, "convkeys: can't open /dev/random, using rand()\n");
+		srand(time(0));
+		for(i = 0; i < len; i++)
+			p[i] = rand();
+		return;
+	}
+	read(fd, p, len);
+	close(fd);
+}
+
+void
+oldCBCencrypt(char *key7, char *p, int len)
+{
+	uchar ivec[8];
+	uchar key[8];
+	DESstate s;
+
+	memset(ivec, 0, 8);
+	des56to64((uchar*)key7, key);
+	setupDESstate(&s, key, ivec);
+	desCBCencrypt((uchar*)p, len, &s);
+}
+
+void
+oldCBCdecrypt(char *key7, char *p, int len)
+{
+	uchar ivec[8];
+	uchar key[8];
+	DESstate s;
+
+	memset(ivec, 0, 8);
+	des56to64((uchar*)key7, key);
+	setupDESstate(&s, key, ivec);
+	desCBCdecrypt((uchar*)p, len, &s);
+
+}
+
+static int
+badname(char *s)
+{
+	int n;
+	Rune r;
+
+	for (; *s != '\0'; s += n) {
+		n = chartorune(&r, s);
+		if (n == 1 && r == Runeerror)
+			return 1;
+	}
+	return 0;
+}
+
+int
+convert(char *p, char *key, int len)
+{
+	int i;
+
+	len -= KEYDBOFF;
+	if(len % KEYDBLEN){
+		fprint(2, "convkeys: file odd length; not converting %d bytes\n",
+			len % KEYDBLEN);
+		len -= len % KEYDBLEN;
+	}
+	len += KEYDBOFF;
+	oldCBCdecrypt(authkey, p, len);
+	for(i = KEYDBOFF; i < len; i += KEYDBLEN)
+		if (badname(&p[i])) {
+			print("bad name %.30s... - aborting\n", &p[i]);
+			return 0;
+		}
+	if(verb)
+		for(i = KEYDBOFF; i < len; i += KEYDBLEN)
+			print("%s\n", &p[i]);
+
+	randombytes((uchar*)p, 8);
+	oldCBCencrypt(key, p, len);
+	return len;
+}
+
+void
+usage(void)
+{
+	fprint(2, "usage: convkeys keyfile\n");
+	exits("usage");
+}