--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/simtool/chvfunc.c	Wed Mar 17 00:42:47 2021 +0000
@@ -0,0 +1,35 @@
+/*
+ * This module implements a functional interface to CHV commands,
+ * intended for high-level wrappers like sws-*.
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include "simresp.h"
+
+verify_chv_func(p2, pin)
+	unsigned p2;
+	char *pin;
+{
+	u_char cmd[13];
+	int rc;
+
+	/* VERIFY CHV command APDU */
+	cmd[0] = 0xA0;
+	cmd[1] = 0x20;
+	cmd[2] = 0x00;
+	cmd[3] = p2;
+	cmd[4] = 8;
+	rc = encode_pin_entry(pin, cmd + 5);
+	if (rc < 0)
+		return(rc);
+	rc = apdu_exchange(cmd, 13);
+	if (rc < 0)
+		return(rc);
+	if (sim_resp_sw != 0x9000) {
+		fprintf(stderr, "bad SW response to VERIFY CHV: %04X\n",
+			sim_resp_sw);
+		return(-1);
+	}
+	return(0);
+}