upstream: print the full pubkey being attempted at loglevel >=

debug2; bz2939

OpenBSD-Commit-ID: ac0fe5ca1429ebf4d460bad602adc96de0d7e290

1 files changed, 17 insertions, 1 deletions

diff --git a/auth2-pubkey.c b/auth2-pubkey.c
index 2fb5950ea..0b3975a74 100644
--- a/auth2-pubkey.c
+++ b/auth2-pubkey.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: auth2-pubkey.c,v 1.86 2018/09/20 03:28:06 djm Exp $ */
+/* $OpenBSD: auth2-pubkey.c,v 1.87 2019/01/22 11:26:16 djm Exp $ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  *
@@ -102,6 +102,22 @@ userauth_pubkey(struct ssh *ssh)
             (r = sshpkt_get_cstring(ssh, &pkalg, NULL)) != 0 ||
             (r = sshpkt_get_string(ssh, &pkblob, &blen)) != 0)
                 fatal("%s: parse request failed: %s", __func__, ssh_err(r));
+
+        if (log_level_get() >= SYSLOG_LEVEL_DEBUG2) {
+                char *keystring;
+                struct sshbuf *pkbuf;
+
+                if ((pkbuf = sshbuf_from(pkblob, blen)) == NULL)
+                        fatal("%s: sshbuf_from failed", __func__);
+                if ((keystring = sshbuf_dtob64(pkbuf)) == NULL)
+                        fatal("%s: sshbuf_dtob64 failed", __func__);
+                debug2("%s: %s user %s %s public key %s %s", __func__,
+                    authctxt->valid ? "valid" : "invalid", authctxt->user,
+                    have_sig ? "attempting" : "querying", pkalg, keystring);
+                sshbuf_free(pkbuf);
+                free(keystring);
+        }
+
         pktype = sshkey_type_from_name(pkalg);
         if (pktype == KEY_UNSPEC) {
                 /* this is perfectly legal */