diff --git a/crypto/openssh/servconf.c b/crypto/openssh/servconf.c index da558de2c19..6fb8be5bfd5 100644 --- a/crypto/openssh/servconf.c +++ b/crypto/openssh/servconf.c @@ -22,6 +22,7 @@ __RCSID("$FreeBSD$"); #include #include +#include #include #include #include @@ -206,24 +207,28 @@ fill_default_server_options(ServerOptions *options) /* Standard Options */ if (options->protocol == SSH_PROTO_UNKNOWN) options->protocol = SSH_PROTO_2; +#define add_host_key_file(path) \ + do { \ + if (access((path), O_RDONLY) == 0) \ + options->host_key_files \ + [options->num_host_key_files++] = (path); \ + } while (0) if (options->num_host_key_files == 0) { /* fill default hostkeys for protocols */ if (options->protocol & SSH_PROTO_1) - options->host_key_files[options->num_host_key_files++] = - _PATH_HOST_KEY_FILE; + add_host_key_file(_PATH_HOST_KEY_FILE); if (options->protocol & SSH_PROTO_2) { - options->host_key_files[options->num_host_key_files++] = - _PATH_HOST_RSA_KEY_FILE; - options->host_key_files[options->num_host_key_files++] = - _PATH_HOST_DSA_KEY_FILE; + add_host_key_file(_PATH_HOST_RSA_KEY_FILE); + add_host_key_file(_PATH_HOST_DSA_KEY_FILE); #ifdef OPENSSL_HAS_ECC - options->host_key_files[options->num_host_key_files++] = - _PATH_HOST_ECDSA_KEY_FILE; + add_host_key_file(_PATH_HOST_ECDSA_KEY_FILE); #endif - options->host_key_files[options->num_host_key_files++] = - _PATH_HOST_ED25519_KEY_FILE; + add_host_key_file(_PATH_HOST_ED25519_KEY_FILE); } } +#undef add_host_key_file + if (options->num_host_key_files == 0) + fatal("No host key files found"); /* No certificates by default */ if (options->num_ports == 0) options->ports[options->num_ports++] = SSH_DEFAULT_PORT;