Encrypting rmt

[dump.git] / rmt / rmt.c

diff --git a/rmt/rmt.c b/rmt/rmt.c
index 3bd6207406336874a960410a365583ecc597eed2..6f01bcce70c78793a6b2dbf87dbbc1458152c4ed 100644 (file)
--- a/rmt/rmt.c
+++ b/rmt/rmt.c
@@ -37,7 +37,7 @@
 
 #ifndef lint
 static const char rcsid[] =
-       "$Id: rmt.c,v 1.25 2003/03/31 10:09:41 stelian Exp $";
+       "$Id: rmt.c,v 1.26 2003/04/08 19:52:37 stelian Exp $";
 #endif /* not linux */
 
 /*
@@ -114,6 +114,10 @@ static int rmt_version = 0;
 char   *checkbuf __P((char *, int));
 void    error __P((int));
 void    getstring __P((char *));
+#ifdef ERMT
+char   *cipher __P((char *, int, int));
+void   decrypt __P((void));
+#endif
 
 int
 main(int argc, char *argv[])
@@ -122,7 +126,15 @@ main(int argc, char *argv[])
        char c;
        int n, i, cc, oflags;
        unsigned long block = 0;
+       char *cp;
 
+#ifdef ERMT
+       if (argc > 1 && strcmp(argv[1], "-d") == 0)
+               decrypt(); /* decrypt stdin to stdout, and exit() */
+#endif
+       /* Skip "-c /etc/rmt", which appears when rmt is used as a shell */
+       if (argc > 2 && strcmp(argv[1], "-c") == 0)
+               argc -= 2, argv += 2;
        argc--, argv++;
        if (argc > 0) {
                debug = fopen(*argv, "w");
@@ -198,7 +210,13 @@ top:
                                exit(2);
                        }
                }
-               rval = write(tape, record, n);
+#ifdef ERMT
+               if ((cp = cipher(record, n, 1)) == NULL)
+                       goto ioerror;
+#else
+               cp = record;
+#endif
+               rval = write(tape, cp, n);
                if (rval < 0)
                        goto ioerror;
                block += n >> 10;
@@ -212,9 +230,15 @@ top:
                rval = read(tape, record, n);
                if (rval < 0)
                        goto ioerror;
+#ifdef ERMT
+               if ((cp = cipher(record, rval, 0)) == NULL)
+                       goto ioerror;
+#else
+               cp = record;
+#endif
                (void)sprintf(resp, "A%lld\n", (long long)rval);
                (void)write(1, resp, strlen(resp));
-               (void)write(1, record, rval);
+               (void)write(1, cp, rval);
                block += n >> 10;
                goto top;