Brendan Shanks : winhttp: Treat a partial certificate chain as having an unknown/invalid CA.

[Alexandre Julliard]

Module: wine
Branch: stable
Commit: f01f67c9bd2b7a04c63120ee35599ee1f29094d3
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=f01f67c9bd2b7a04c63120ee3...

Author: Brendan Shanks <bshanks(a)codeweavers.com>
Date:   Tue Jun 16 13:48:22 2020 -0700

winhttp: Treat a partial certificate chain as having an unknown/invalid CA.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=46726
Signed-off-by: Brendan Shanks <bshanks(a)codeweavers.com>
Signed-off-by: Hans Leidekker <hans(a)codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>
(cherry picked from commit aa80ef20504660fa55914d40fb4bb296eef94c59)
Signed-off-by: Michael Stefaniuc <mstefani(a)winehq.org>

---

 dlls/winhttp/net.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/dlls/winhttp/net.c b/dlls/winhttp/net.c
index c9da098f52d..f10aa255e2f 100644
--- a/dlls/winhttp/net.c
+++ b/dlls/winhttp/net.c
@@ -84,8 +84,10 @@ static DWORD netconn_verify_cert( PCCERT_CONTEXT cert, WCHAR *server, DWORD secu
                 if (!(security_flags & SECURITY_FLAG_IGNORE_CERT_DATE_INVALID))
                     err = ERROR_WINHTTP_SECURE_CERT_DATE_INVALID;
             }
-            else if (chain->TrustStatus.dwErrorStatus &
-                     CERT_TRUST_IS_UNTRUSTED_ROOT)
+            else if ((chain->TrustStatus.dwErrorStatus &
+                      CERT_TRUST_IS_UNTRUSTED_ROOT) ||
+                     (chain->TrustStatus.dwErrorStatus &
+                      CERT_TRUST_IS_PARTIAL_CHAIN))
             {
                 if (!(security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA))
                     err = ERROR_WINHTTP_SECURE_INVALID_CA;