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#include <u.h>
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#include <libc.h>
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#include <authsrv.h>
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#include <ctype.h>
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#include <bio.h>
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#include "authcmdlib.h"
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void	install(char*, char*, char*, long, int);
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int	exists (char*, char*);
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void
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usage(void)
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{
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	fprint(2, "usage: changeuser [-pn] user\n");
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	exits("usage");
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}
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void
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main(int argc, char *argv[])
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{
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	char *u, key[DESKEYLEN], answer[32], p9pass[32];
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	int which, i, newkey, newbio, dosecret;
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	long t;
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	Acctbio a;
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	Fs *f;
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	srand(getpid()*time(0));
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	fmtinstall('K', keyfmt);
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	which = 0;
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	ARGBEGIN{
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	case 'p':
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		which |= Plan9;
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		break;
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	case 'n':
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		which |= Securenet;
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		break;
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	default:
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		usage();
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	}ARGEND
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	argv0 = "changeuser";
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	if(argc != 1)
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		usage();
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	u = *argv;
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	if(memchr(u, '\0', ANAMELEN) == 0)
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		error("bad user name");
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	if(!which)
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		which = Plan9;
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	newbio = 0;
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	t = 0;
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	a.user = 0;
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	if(which & Plan9){
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		f = &fs[Plan9];
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		newkey = 1;
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		if(exists(f->keys, u)){
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			readln("assign new password? [y/n]: ", answer, sizeof answer, 0);
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			if(answer[0] != 'y' && answer[0] != 'Y')
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				newkey = 0;
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		}
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		if(newkey)
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			getpass(key, p9pass, 1, 1);
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		dosecret = getsecret(newkey, p9pass);
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		t = getexpiration(f->keys, u);
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		install(f->keys, u, key, t, newkey);
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		if(dosecret && setsecret(KEYDB, u, p9pass) == 0)
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			error("error writing Inferno/pop secret");
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		newbio = querybio(f->who, u, &a);
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		if(newbio)
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			wrbio(f->who, &a);
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		print("user %s installed for Plan 9\n", u);
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		syslog(0, AUTHLOG, "user %s installed for plan 9", u);
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	}
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	if(which & Securenet){
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		f = &fs[Securenet];
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		newkey = 1;
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		if(exists(f->keys, u)){
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			readln("assign new key? [y/n]: ", answer, sizeof answer, 0);
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			if(answer[0] != 'y' && answer[0] != 'Y')
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				newkey = 0;
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		}
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		if(newkey)
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			for(i=0; i<DESKEYLEN; i++)
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				key[i] = nrand(256);
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		if(a.user == 0){
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			t = getexpiration(f->keys, u);
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			newbio = querybio(f->who, u, &a);
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		}
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		install(f->keys, u, key, t, newkey);
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		if(newbio)
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			wrbio(f->who, &a);
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		findkey(f->keys, u, key);
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		print("user %s: SecureNet key: %K\n", u, key);
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		checksum(key, answer);
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		print("verify with checksum %s\n", answer);
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		print("user %s installed for SecureNet\n", u);
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		syslog(0, AUTHLOG, "user %s installed for securenet", u);
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	}
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	exits(0);
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}
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void
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install(char *db, char *u, char *key, long t, int newkey)
106 
{
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	char buf[KEYDBBUF+ANAMELEN+20];
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	int fd;
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110 
	if(!exists(db, u)){
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		snprint(buf, sizeof buf, "%s/%s", db, u);
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		fd = create(buf, OREAD, 0777|DMDIR);
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		if(fd < 0)
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			error("can't create user %s: %r", u);
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		close(fd);
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	}
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	if(newkey){
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		snprint(buf, sizeof buf, "%s/%s/key", db, u);
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		fd = open(buf, OWRITE);
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		if(fd < 0 || write(fd, key, DESKEYLEN) != DESKEYLEN)
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			error("can't set key: %r");
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		close(fd);
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	}
125 
 
126 
	if(t == -1)
127 
		return;
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	snprint(buf, sizeof buf, "%s/%s/expire", db, u);
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	fd = open(buf, OWRITE);
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	if(fd < 0 || fprint(fd, "%ld", t) < 0)
131 
		error("can't write expiration time");
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	close(fd);
133 
}
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135 
int
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exists(char *db, char *u)
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{
138 
	char buf[KEYDBBUF+ANAMELEN+6];
139 
 
140 
	snprint(buf, sizeof buf, "%s/%s/expire", db, u);
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	if(access(buf, 0) < 0)
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		return 0;
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	return 1;
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}