Check validity of Ed25519 key during an upgrade.

[tinc] / src / protocol_auth.c

diff --git a/src/protocol_auth.c b/src/protocol_auth.c
index ac486ea..be90d92 100644 (file)
--- a/src/protocol_auth.c
+++ b/src/protocol_auth.c
@@ -379,8 +379,8 @@ bool id_h(connection_t *c, const char *request) {
                }
 
                if(experimental)
-                       if(!read_ecdsa_public_key(c))
-                               return false;
+                       read_ecdsa_public_key(c);
+                       /* Ignore failures if no key known yet */
        } else {
                if(c->protocol_minor && !ecdsa_active(c->ecdsa))
                        c->protocol_minor = 1;
@@ -730,6 +730,12 @@ static bool upgrade_h(connection_t *c, const char *request) {
                return false;
        }
 
+       c->ecdsa = ecdsa_set_base64_public_key(pubkey);
+       if(!c->ecdsa) {
+               logger(DEBUG_ALWAYS, LOG_INFO, "Got bad Ed25519 public key from %s (%s), not upgrading.", c->name, c->hostname);
+               return false;
+       }
+
        logger(DEBUG_ALWAYS, LOG_INFO, "Got Ed25519 public key from %s (%s), upgrading!", c->name, c->hostname);
        append_config_file(c->name, "Ed25519PublicKey", pubkey);
        c->allow_request = TERMREQ;