commit 282a1d0a91375cdda585d7c5bf24f61e08623c04
from: Omar Polo <op@omarpolo.com>
date: Tue Mar 16 10:14:24 2021 UTC

don't crash on handshake failures

ty gemini://discovery.geminiprotocol.com =)

commit - a636f50e13c29857f48d1f52db8137dbf7d69660
commit + 282a1d0a91375cdda585d7c5bf24f61e08623c04
blob - cd30080724e0fd247b0e1054a84c0870ca3af214
blob + 6ced0cd6450326897cc443a343a8bb845c833ad1
--- gemini.c
+++ gemini.c
@@ -234,6 +234,7 @@ do_handshake(int fd, short ev, void *d)
 {
 	struct req	*req = d;
 	const char	*hash;
+	char		*e;
 
 	if (ev == EV_TIMEOUT) {
 		close_with_err(req, "Timeout loading page");
@@ -250,6 +251,13 @@ do_handshake(int fd, short ev, void *d)
 	}
 
 	hash = tls_peer_cert_hash(req->ctx);
+	if (hash == NULL) {
+		if (asprintf(&e, "handshake failed: %s", tls_error(req->ctx)) == -1)
+			abort();
+		close_with_err(req, e);
+		free(e);
+		return;
+	}
 	imsg_compose(ibuf, IMSG_CHECK_CERT, req->id, 0, -1, hash, strlen(hash)+1);
 	imsg_flush(ibuf);
 }