From 5d5bc03570f8b93f43e68377c646d4e534d5164a Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Thu, 12 Mar 1992 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1992-03-12

---
 port/devcons.c  | 13 +++----------
 port/devlance.c |  2 +-
 port/devmnt.c   | 32 +++++++++++++++++++++++++++-----
 port/portfns.h  |  1 -
 port/sysfile.c  |  4 ++--
 5 files changed, 33 insertions(+), 19 deletions(-)

diff --git a/port/devcons.c b/port/devcons.c
index aa9e43e67340c3387a607d0657579407851a1c4b..341b5155204071e7e1aba06f543bfe5f764400b8 100644
--- a/port/devcons.c
+++ b/port/devcons.c
@@ -889,19 +889,12 @@ conswstat(Chan *c, char *dp)
  *  Rand is huge and not worth it here.  Be small.
  *  Borrowed from the white book.
  */
-ulong	randn;
-void
-srand(char *s)
-{
-	randn = MACHP(0)->ticks * boottime;
-	while(s && *s)
-		randn = (randn << 1) ^ *s++;
-}
-
 int
 nrand(int n)
 {
-	randn = randn*1103515245 + 12345;
+	static ulong randn;
+
+	randn = randn*1103515245 + 12345 + MACHP(0)->ticks;
 	return (randn>>16) % n;
 }
 
diff --git a/port/devlance.c b/port/devlance.c
index 74eaaa25165d8ceebf8989a5af03598b767e3b74..414e9776096cfa8cbf27408f64db340617465713 100644
--- a/port/devlance.c
+++ b/port/devlance.c
@@ -282,7 +282,7 @@ lanceoput(Queue *q, Block *bp )
 			qlock(&l);
 			l.prom++;
 			if(l.prom == 1)
-/*				lancestart(PROM, 1);/**/
+				lancestart(PROM, 1);/**/
 			qunlock(&l);
 		}
 		freeb(bp);
diff --git a/port/devmnt.c b/port/devmnt.c
index 86ba9d04aff794ec2aabde8d66fe6b81ae9fa678..823825784bfeb0459688c4c3fc5ba1b16c279f55 100644
--- a/port/devmnt.c
+++ b/port/devmnt.c
@@ -130,7 +130,7 @@ mntattach(char *muxattach)
 	struct bogus{
 		Chan	*chan;
 		char	*spec;
-		char	*auth;
+		char	*serv;
 	}bogus;
 
 	bogus = *((struct bogus *)muxattach);
@@ -141,7 +141,7 @@ mntattach(char *muxattach)
 			if(m->ref > 0 && m->id && m->c == bogus.chan) {
 				m->ref++;
 				unlock(m);
-				return mattach(m, bogus.spec, bogus.auth);
+				return mattach(m, bogus.spec, bogus.serv);
 			}
 			unlock(m);	
 		}
@@ -174,14 +174,16 @@ mntattach(char *muxattach)
 	incref(m->c);
 	unlock(m);
 
-	return mattach(m, bogus.spec, bogus.auth);
+	return mattach(m, bogus.spec, bogus.serv);
 }
 
 Chan *
-mattach(Mnt *m, char *spec, char *auth)
+mattach(Mnt *m, char *spec, char *serv)
 {
 	Chan *c;
 	Mntrpc *r;
+	char chal[8];
+	int i;
 
 	r = mntralloc();
 
@@ -191,6 +193,26 @@ mattach(Mnt *m, char *spec, char *auth)
 	unlock(&mntalloc);
 	c->mntindex = m-mntalloc.mntarena;
 
+	if(*serv && !waserror()){
+		r->request.type = Tauth;
+		r->request.fid = c->fid;
+		memmove(r->request.uname, u->p->user, NAMELEN);
+		chal[0] = 1;
+		for(i = 1; i < sizeof chal; i++)
+			chal[i++] = nrand(256);
+		memmove(r->request.chal, chal, 8);
+		strncpy(r->request.chal+8, serv, NAMELEN);
+		encrypt(u->p->pgrp->crypt->key, r->request.chal, 8+NAMELEN);
+		mountrpc(m, r);
+		decrypt(u->p->pgrp->crypt->key, r->reply.chal, 2*8+2*DESKEYLEN);
+		chal[0] = 4;
+		if(memcmp(chal, r->reply.chal, 8) != 0)
+			error(Eperm);
+		memmove(r->request.auth, r->reply.chal+8+DESKEYLEN, 8+DESKEYLEN);
+		poperror();
+	}else
+		memset(r->request.auth, 0, sizeof r->request.auth);
+
 	if(waserror()){
 		mntfree(r);
 		close(c);
@@ -200,7 +222,6 @@ mattach(Mnt *m, char *spec, char *auth)
 	r->request.fid = c->fid;
 	memmove(r->request.uname, u->p->user, NAMELEN);
 	strncpy(r->request.aname, spec, NAMELEN);
-	strncpy(r->request.auth, auth, NAMELEN);
 	mountrpc(m, r);
 
 	c->qid = r->reply.qid;
@@ -249,6 +270,7 @@ mntclone(Chan *c, Chan *nc)
 	nc->mqid = c->qid;
 	incref(m);
 
+	USED(alloc);
 	poperror();
 	mntfree(r);
 	return nc;
diff --git a/port/portfns.h b/port/portfns.h
index 9920f254fa2c114cc6ee6185b088baa6ffa3b2fb..6f9faab488cf5d7ba9af8c551b2deffb86f141b7 100644
--- a/port/portfns.h
+++ b/port/portfns.h
@@ -212,7 +212,6 @@ void	sleep(Rendez*, int(*)(void*), void*);
 int	splhi(void);
 int	spllo(void);
 void	splx(int);
-void	srand(char*);
 int	streamclose(Chan*);
 int	streamclose1(Stream*);
 int	streamenter(Stream*);
diff --git a/port/sysfile.c b/port/sysfile.c
index 371fc3bd1576ba0d738fabba65a58c438bc5c285..d3c45c846d588e2a5f92ecf03a9d528883044143 100644
--- a/port/sysfile.c
+++ b/port/sysfile.c
@@ -393,7 +393,7 @@ bindmount(ulong *arg, int ismount)
 	struct{
 		Chan	*chan;
 		char	*spec;
-		char	*auth;
+		char	*serv;
 	}bogus;
 
 	flag = arg[2];
@@ -408,7 +408,7 @@ bindmount(ulong *arg, int ismount)
 		validaddr(arg[4], 1, 0);
 		if(vmemchr((char*)arg[4], '\0', NAMELEN) == 0)
 			error(Ebadarg);
-		bogus.auth = (char*)arg[4];
+		bogus.serv = (char*)arg[4];
 		ret = devno('M', 0);
 		c0 = (*devtab[ret].attach)((char*)&bogus);
 	}else{