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-rw-r--r--lib/vtls/schannel.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/vtls/schannel.h b/lib/vtls/schannel.h
index 0b4c4d934..05323c7a7 100644
--- a/lib/vtls/schannel.h
+++ b/lib/vtls/schannel.h
@@ -28,6 +28,18 @@
#ifdef USE_SCHANNEL
+/* Wincrypt must be included before anything that could include OpenSSL. */
+#if defined(USE_WIN32_CRYPTO)
+#include <wincrypt.h>
+/* Undefine wincrypt conflicting symbols for BoringSSL. */
+#undef X509_NAME
+#undef X509_EXTENSIONS
+#undef PKCS7_ISSUER_AND_SERIAL
+#undef PKCS7_SIGNER_INFO
+#undef OCSP_REQUEST
+#undef OCSP_RESPONSE
+#endif
+
#include <schnlsp.h>
#include <schannel.h>
#include "curl_sspi.h"