File tigervnc-fix-saving-of-bad-server-certs.patch of Package tigervnc

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File tigervnc-fix-saving-of-bad-server-certs.patch of Package tigervnc (Revision 6583f6070b60fa018f282780c6538b68)

Currently displaying revision 6583f6070b60fa018f282780c6538b68 , Show latest

From dbad687182ae9093efaf096a069eeafc18b22973 Mon Sep 17 00:00:00 2001
From: Pierre Ossman <ossman@cendio.se>
Date: Mon, 30 Dec 2019 10:24:11 +0100
Subject: [PATCH 1/2] Fix saving of bad server certificates

This check is completely backwards and it is currently unknown how
this ever worked.
---
 common/rfb/CSecurityTLS.cxx | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/common/rfb/CSecurityTLS.cxx b/common/rfb/CSecurityTLS.cxx
index aa1910909..c1a00212a 100644
--- a/common/rfb/CSecurityTLS.cxx
+++ b/common/rfb/CSecurityTLS.cxx
@@ -416,8 +416,9 @@ void CSecurityTLS::checkSession()
   delete [] certinfo;
 
   if (gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, NULL, &out_size)
-      == GNUTLS_E_SHORT_MEMORY_BUFFER)
-    throw AuthFailureException("Out of memory");
+      != GNUTLS_E_SHORT_MEMORY_BUFFER)
+    throw AuthFailureException("certificate issuer unknown, and certificate "
+                               "export failed");
 
   // Save cert
   out_buf =  new char[out_size];

From 6208f47dcbf68ff1e751b0b526bb643f0da867a6 Mon Sep 17 00:00:00 2001
From: Pierre Ossman <ossman@cendio.se>
Date: Mon, 30 Dec 2019 10:26:12 +0100
Subject: [PATCH 2/2] Remove unneeded memory checks

new throws an exception on allocation errors rather than return NULL.
---
 common/rfb/CSecurityTLS.cxx | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/common/rfb/CSecurityTLS.cxx b/common/rfb/CSecurityTLS.cxx
index c1a00212a..5c303a37c 100644
--- a/common/rfb/CSecurityTLS.cxx
+++ b/common/rfb/CSecurityTLS.cxx
@@ -396,8 +396,6 @@ void CSecurityTLS::checkSession()
   vlog.debug("%s", info.data);
 
   certinfo = new char[len];
-  if (certinfo == NULL)
-    throw AuthFailureException("Out of memory");
 
   snprintf(certinfo, len, "This certificate has been signed by an unknown "
                           "authority:\n\n%s\n\nDo you want to save it and "
@@ -422,8 +420,6 @@ void CSecurityTLS::checkSession()
 
   // Save cert
   out_buf =  new char[out_size];
-  if (out_buf == NULL)
-    throw AuthFailureException("Out of memory");
 
   if (gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, out_buf, &out_size) < 0)
     throw AuthFailureException("certificate issuer unknown, and certificate "

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File tigervnc-fix-saving-of-bad-server-certs.patch of Package tigervnc (Revision 6583f6070b60fa018f282780c6538b68)

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