upstream commit

Turn off DSA by default; add HostKeyAlgorithms to the
 server and PubkeyAcceptedKeyTypes to the client side, so it still can be
 tested or turned back on; feedback and ok djm@

Upstream-ID: 8450a9e6d83f80c9bfed864ff061dfc9323cec21

1 files changed, 20 insertions, 17 deletions

diff --git a/readconf.c b/readconf.c
index db7d0bbbf..f1c860b9c 100644
--- a/readconf.c
+++ b/readconf.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: readconf.c,v 1.237 2015/06/26 05:13:20 djm Exp $ */
+/* $OpenBSD: readconf.c,v 1.238 2015/07/10 06:21:53 markus Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -157,6 +157,7 @@ typedef enum {
         oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
         oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
         oFingerprintHash, oUpdateHostkeys, oHostbasedKeyTypes,
+        oPubkeyAcceptedKeyTypes,
         oIgnoredUnknownOption, oDeprecated, oUnsupported
 } OpCodes;
 
@@ -275,6 +276,7 @@ static struct {
         { "fingerprinthash", oFingerprintHash },
         { "updatehostkeys", oUpdateHostkeys },
         { "hostbasedkeytypes", oHostbasedKeyTypes },
+        { "pubkeyacceptedkeytypes", oPubkeyAcceptedKeyTypes },
         { "ignoreunknown", oIgnoreUnknown },
 
         { NULL, oBadOption }
@@ -1115,14 +1117,17 @@ parse_int:
                 break;
 
         case oHostKeyAlgorithms:
+                charptr = &options->hostkeyalgorithms;
+parse_keytypes:
                 arg = strdelim(&s);
                 if (!arg || *arg == '\0')
-                        fatal("%.200s line %d: Missing argument.", filename, linenum);
+                        fatal("%.200s line %d: Missing argument.",
+                            filename, linenum);
                 if (!sshkey_names_valid2(arg, 1))
-                        fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
-                            filename, linenum, arg ? arg : "<NONE>");
-                if (*activep && options->hostkeyalgorithms == NULL)
-                        options->hostkeyalgorithms = xstrdup(arg);
+                        fatal("%s line %d: Bad key types '%s'.",
+                                filename, linenum, arg ? arg : "<NONE>");
+                if (*activep && *charptr == NULL)
+                        *charptr = xstrdup(arg);
                 break;
 
         case oProtocol:
@@ -1485,16 +1490,11 @@ parse_int:
 
         case oHostbasedKeyTypes:
                 charptr = &options->hostbased_key_types;
-                arg = strdelim(&s);
-                if (!arg || *arg == '\0')
-                        fatal("%.200s line %d: Missing argument.",
-                            filename, linenum);
-                if (!sshkey_names_valid2(arg, 1))
-                        fatal("%s line %d: Bad key types '%s'.",
-                                filename, linenum, arg ? arg : "<NONE>");
-                if (*activep && *charptr == NULL)
-                        *charptr = xstrdup(arg);
-                break;
+                goto parse_keytypes;
+
+        case oPubkeyAcceptedKeyTypes:
+                charptr = &options->pubkey_key_types;
+                goto parse_keytypes;
 
         case oDeprecated:
                 debug("%s line %d: Deprecated option \"%s\"",
@@ -1676,6 +1676,7 @@ initialize_options(Options * options)
         options->fingerprint_hash = -1;
         options->update_hostkeys = -1;
         options->hostbased_key_types = NULL;
+        options->pubkey_key_types = NULL;
 }
 
 /*
@@ -1858,7 +1859,9 @@ fill_default_options(Options * options)
         if (options->update_hostkeys == -1)
                 options->update_hostkeys = 0;
         if (options->hostbased_key_types == NULL)
-                options->hostbased_key_types = xstrdup("*");
+                options->hostbased_key_types = xstrdup(KEX_DEFAULT_PK_ALG);
+        if (options->pubkey_key_types == NULL)
+                options->pubkey_key_types = xstrdup(KEX_DEFAULT_PK_ALG);
 
 #define CLEAR_ON_NONE(v) \
         do { \