Add real factotum.

libauth/auth_getuserpasswd.c

@@ -0,0 +1,75 @@
+#include <u.h>
+#include <libc.h>
+#include <auth.h>
+#include "authlocal.h"
+
+enum {
+	ARgiveup = 100,
+};
+
+static int
+dorpc(AuthRpc *rpc, char *verb, char *val, int len, AuthGetkey *getkey)
+{
+	int ret;
+
+	for(;;){
+		if((ret = auth_rpc(rpc, verb, val, len)) != ARneedkey && ret != ARbadkey)
+			return ret;
+		if(getkey == nil)
+			return ARgiveup;	/* don't know how */
+		if((*getkey)(rpc->arg) < 0)
+			return ARgiveup;	/* user punted */
+	}
+}
+
+UserPasswd*
+auth_getuserpasswd(AuthGetkey *getkey, char *fmt, ...)
+{
+	AuthRpc *rpc;
+	char *f[3], *p, *params;
+	int fd;
+	va_list arg;
+	UserPasswd *up;
+
+	up = nil;
+	rpc = nil;
+	params = nil;
+
+	fd = open("/mnt/factotum/rpc", ORDWR);
+	if(fd < 0)
+		goto out;
+	rpc = auth_allocrpc(fd);
+	if(rpc == nil)
+		goto out;
+	quotefmtinstall();	/* just in case */
+	va_start(arg, fmt);
+	params = vsmprint(fmt, arg);
+	va_end(arg);
+	if(params == nil)
+		goto out;
+
+	if(dorpc(rpc, "start", params, strlen(params), getkey) != ARok
+	|| dorpc(rpc, "read", nil, 0, getkey) != ARok)
+		goto out;
+
+	rpc->arg[rpc->narg] = '\0';
+	if(tokenize(rpc->arg, f, 2) != 2){
+		werrstr("bad answer from factotum");
+		goto out;
+	}
+	up = malloc(sizeof(*up)+rpc->narg+1);
+	if(up == nil)
+		goto out;
+	p = (char*)&up[1];
+	strcpy(p, f[0]);
+	up->user = p;
+	p += strlen(p)+1;
+	strcpy(p, f[1]);
+	up->passwd = p;
+
+out:
+	free(params);
+	auth_freerpc(rpc);
+	close(fd);
+	return up;
+}