1 files changed, 7 insertions, 5 deletions

diff --git a/authfd.c b/authfd.c
index ecdd869ab..95348abfc 100644
--- a/authfd.c
+++ b/authfd.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: authfd.c,v 1.111 2018/07/09 21:59:10 markus Exp $ */
+/* $OpenBSD: authfd.c,v 1.113 2018/12/27 23:02:11 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -94,7 +94,7 @@ ssh_get_authentication_socket(int *fdp)
                 *fdp = -1;
 
         authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
-        if (!authsocket)
+        if (authsocket == NULL || *authsocket == '\0')
                 return SSH_ERR_AGENT_NOT_PRESENT;
 
         memset(&sunaddr, 0, sizeof(sunaddr));
@@ -327,10 +327,12 @@ ssh_free_identitylist(struct ssh_identitylist *idl)
 static u_int
 agent_encode_alg(const struct sshkey *key, const char *alg)
 {
-        if (alg != NULL && key->type == KEY_RSA) {
-                if (strcmp(alg, "rsa-sha2-256") == 0)
+        if (alg != NULL && sshkey_type_plain(key->type) == KEY_RSA) {
+                if (strcmp(alg, "rsa-sha2-256") == 0 ||
+                    strcmp(alg, "rsa-sha2-256-cert-v01@openssh.com") == 0)
                         return SSH_AGENT_RSA_SHA2_256;
-                else if (strcmp(alg, "rsa-sha2-512") == 0)
+                if (strcmp(alg, "rsa-sha2-512") == 0 ||
+                    strcmp(alg, "rsa-sha2-512-cert-v01@openssh.com") == 0)
                         return SSH_AGENT_RSA_SHA2_512;
         }
         return 0;