new auth

src/cmd/auth/factotum/key.c

@@ -0,0 +1,217 @@
+#include "std.h"
+#include "dat.h"
+
+Ring ring;
+
+Key*
+keyiterate(int skip, char *fmt, ...)
+{
+	int i;
+	Attr *a;
+	Key *k;
+	va_list arg;
+
+	va_start(arg, fmt);
+	a = parseattrfmtv(fmt, arg);
+	va_end(arg);
+
+	for(i=0; i<ring.nkey; i++){
+		k = ring.key[i];
+		if(matchattr(a, k->attr, k->privattr)){
+			if(skip-- > 0)
+				continue;
+			k->ref++;
+			freeattr(a);
+			return k;
+		}
+	}
+	freeattr(a);
+	werrstr("no key found");
+	return nil;
+}
+
+Key*
+keylookup(char *fmt, ...)
+{
+	int i;
+	Attr *a;
+	Key *k;
+	va_list arg;
+
+	va_start(arg, fmt);
+	a = parseattrfmtv(fmt, arg);
+	va_end(arg);
+
+	for(i=0; i<ring.nkey; i++){
+		k = ring.key[i];
+		if(matchattr(a, k->attr, k->privattr)){
+			k->ref++;
+			freeattr(a);
+			return k;
+		}
+	}
+	freeattr(a);
+	werrstr("no key found");
+	return nil;
+}
+
+Key*
+keyfetch(Conv *c, char *fmt, ...)
+{
+	int i, tag;
+	Attr *a;
+	Key *k;
+	va_list arg;
+
+	va_start(arg, fmt);
+	a = parseattrfmtv(fmt, arg);
+	va_end(arg);
+
+	tag = 0;
+
+	for(i=0; i<ring.nkey; i++){
+		k = ring.key[i];
+		if(tag < k->tag)
+			tag = k->tag;
+		if(matchattr(a, k->attr, k->privattr)){
+			k->ref++;
+			if(strfindattr(k->attr, "confirm") && confirmkey(c, k) != 1){
+				k->ref--;
+				continue;
+			}
+			freeattr(a);
+			return k;
+		}
+	}
+
+	if(needkey(c, a) < 0)
+		convneedkey(c, a);
+
+	for(i=0; i<ring.nkey; i++){
+		k = ring.key[i];
+		if(k->tag <= tag)
+			continue;
+		if(matchattr(a, k->attr, k->privattr)){
+			k->ref++;
+			if(strfindattr(k->attr, "confirm") && confirmkey(c, k) != 1){
+				k->ref--;
+				continue;
+			}
+			freeattr(a);
+			return k;
+		}
+	}
+	freeattr(a);
+	werrstr("no key found");
+	return nil;
+}
+
+static int taggen;
+
+void
+keyadd(Key *k)
+{
+	int i;
+
+	k->ref++;
+	k->tag = ++taggen;
+	for(i=0; i<ring.nkey; i++){
+		if(matchattr(k->attr, ring.key[i]->attr, nil)
+		&& matchattr(ring.key[i]->attr, k->attr, nil)){
+			keyclose(ring.key[i]);
+			ring.key[i] = k;
+			return;
+		}
+	}
+
+	ring.key = erealloc(ring.key, (ring.nkey+1)*sizeof(ring.key[0]));
+	ring.key[ring.nkey++] = k;
+}
+
+void
+keyclose(Key *k)
+{
+	if(k == nil)
+		return;
+
+	if(--k->ref > 0)
+		return;
+
+	if(k->proto->closekey)
+		(*k->proto->closekey)(k);
+
+	freeattr(k->attr);
+	freeattr(k->privattr);
+	free(k);
+}
+
+Key*
+keyreplace(Conv *c, Key *k, char *fmt, ...)
+{
+	Key *kk;
+	char *msg;
+	Attr *a, *b, *bp;
+	va_list arg;
+
+	va_start(arg, fmt);
+	msg = vsmprint(fmt, arg);
+	if(msg == nil)
+		sysfatal("out of memory");
+	va_end(arg);
+
+	/* replace prompted values with prompts */	
+	a = copyattr(k->attr);
+	bp = parseattr(k->proto->keyprompt);
+	for(b=bp; b; b=b->next){
+		a = delattr(a, b->name);
+		a = addattr(a, "%q?", b->name);
+	}
+	freeattr(bp);
+
+	if(badkey(c, k, msg, a) < 0)
+		convbadkey(c, k, msg, a);
+	kk = keylookup("%A", a);
+	freeattr(a);
+	keyclose(k);
+	if(kk == k){
+		keyclose(kk);
+		werrstr("%s", msg);
+		return nil;
+	}
+
+	if(strfindattr(kk->attr, "confirm")){
+		if(confirmkey(c, kk) != 1){
+			werrstr("key use not confirmed");
+			keyclose(kk);
+			return nil;
+		}
+	}
+	return kk;
+}
+
+void
+keyevict(Conv *c, Key *k, char *fmt, ...)
+{
+	char *msg;
+	Attr *a, *b, *bp;
+	va_list arg;
+
+	va_start(arg, fmt);
+	msg = vsmprint(fmt, arg);
+	if(msg == nil)
+		sysfatal("out of memory");
+	va_end(arg);
+
+	/* replace prompted values with prompts */	
+	a = copyattr(k->attr);
+	bp = parseattr(k->proto->keyprompt);
+	for(b=bp; b; b=b->next){
+		a = delattr(a, b->name);
+		a = addattr(a, "%q?", b->name);
+	}
+	freeattr(bp);
+
+	if(badkey(c, k, msg, nil) < 0)
+		convbadkey(c, k, msg, nil);
+	keyclose(k);
+}