--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libcommon/cardconnect.c	Thu Feb 11 22:28:45 2021 +0000
@@ -0,0 +1,85 @@
+#include <string.h>
+#include <strings.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <pcsclite.h>
+#include <winscard.h>
+
+SCARDCONTEXT hContext;
+SCARDHANDLE hCard;
+char *reader_name_buf;
+
+setup_pcsc_context()
+{
+	LONG rv;
+
+	rv = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &hContext);
+	if (rv != SCARD_S_SUCCESS) {
+		fprintf(stderr, "SCardEstablishContext: %s\n",
+			pcsc_stringify_error(rv));
+		exit(1);
+	}
+	return(0);
+}
+
+get_reader_name()
+{
+	LONG rv;
+	DWORD dwReaders;
+
+	rv = SCardListReaders(hContext, NULL, NULL, &dwReaders);
+	if (rv != SCARD_S_SUCCESS) {
+		fprintf(stderr, "SCardListReaders 1st call: %s\n",
+			pcsc_stringify_error(rv));
+		SCardReleaseContext(hContext);
+		exit(1);
+	}
+	if (dwReaders < 1) {
+		fprintf(stderr,
+	"error: dwReaders returned by SCardListReaders() is less than 1\n");
+		SCardReleaseContext(hContext);
+		exit(1);
+	}
+	reader_name_buf = malloc(dwReaders);
+	if (!reader_name_buf) {
+		perror("malloc for readers list");
+		SCardReleaseContext(hContext);
+		exit(1);
+	}
+	reader_name_buf[0] = '\0';
+	rv = SCardListReaders(hContext, NULL, reader_name_buf, &dwReaders);
+	if (rv != SCARD_S_SUCCESS) {
+		fprintf(stderr, "SCardListReaders 2nd call: %s\n",
+			pcsc_stringify_error(rv));
+		SCardReleaseContext(hContext);
+		exit(1);
+	}
+	if (reader_name_buf[0] == '\0') {
+		fprintf(stderr,
+	"error: list returned by SCardListReaders() begins with a NUL byte\n");
+		SCardReleaseContext(hContext);
+		exit(1);
+	}
+	if (!memchr(reader_name_buf, 0, dwReaders)) {
+		fprintf(stderr,
+"error: list returned by SCardListReaders() does not contain a NUL byte\n");
+		SCardReleaseContext(hContext);
+		exit(1);
+	}
+	return(0);
+}
+
+connect_to_card()
+{
+	LONG rv;
+	DWORD dwActiveProtocol;
+
+	rv = SCardConnect(hContext, reader_name_buf, SCARD_SHARE_EXCLUSIVE,
+			  SCARD_PROTOCOL_T0, &hCard, &dwActiveProtocol);
+	if (rv != SCARD_S_SUCCESS) {
+		fprintf(stderr, "SCardConnect: %s\n", pcsc_stringify_error(rv));
+		SCardReleaseContext(hContext);
+		exit(1);
+	}
+	return(0);
+}