0001_enable-pcsc-via-env-var.patch

diff --git a/src/dev.c b/src/dev.c
index 2d662a6..eabdec4 100644
--- a/src/dev.c
+++ b/src/dev.c
@@ -268,6 +268,7 @@ fido_dev_info_manifest(fido_dev_info_t *devlist, size_t ilen, size_t *olen)
 	run_manifest(devlist, ilen, olen, "nfc", fido_nfc_manifest);
 #endif
 #ifdef USE_PCSC
+	if (getenv("FIDO2_USE_PCSC"))
 	run_manifest(devlist, ilen, olen, "pcsc", fido_pcsc_manifest);
 #endif
 #ifdef USE_WINHELLO
diff --git a/src/pcsc.c b/src/pcsc.c
index d7bd6c6..125c0d2 100644
--- a/src/pcsc.c
+++ b/src/pcsc.c
@@ -183,6 +183,8 @@ fido_pcsc_manifest(fido_dev_info_t *devlist, size_t ilen, size_t *olen)
 
 	*olen = 0;
 
+	if (!getenv("FIDO2_USE_PCSC")) return FIDO_OK;
+
 	if (ilen == 0)
 		return FIDO_OK;
 	if (devlist == NULL)
@@ -247,6 +249,8 @@ fido_pcsc_open(const char *path)
 	DWORD prot = 0;
 	LONG s;
 
+	if (!getenv("FIDO2_USE_PCSC")) goto fail;
+
 	memset(&req, 0, sizeof(req));
 
 	if ((s = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL,