--- a/simtool/grcard1.c	Sat Feb 06 23:52:53 2021 +0000
+++ b/simtool/grcard1.c	Sun Feb 07 00:01:55 2021 +0000
@@ -50,3 +50,43 @@
 	}
 	return(0);
 }
+
+cmd_grcard1_set_adm(argc, argv)
+	char **argv;
+{
+	u_char cmd[23];
+	int rc;
+
+	/* Grcard1 proprietary command APDU */
+	cmd[0] = 0x80;
+	cmd[1] = 0xD4;
+	cmd[2] = 0x01;
+	switch (argv[0][15]) {
+	case '1':
+		cmd[3] = 0x04;
+		break;
+	case '2':
+		cmd[3] = 0x05;
+		break;
+	default:
+		fprintf(stderr, "BUG in grcard1-set-admN command\n");
+		return(-1);
+	}
+	cmd[4] = 18;
+	cmd[5] = 0x03;
+	cmd[6] = 0x00;
+	rc = encode_pin_entry(argv[1], cmd + 7);
+	if (rc < 0)
+		return(rc);
+	rc = encode_pin_entry(argv[2], cmd + 15);
+	if (rc < 0)
+		return(rc);
+	rc = apdu_exchange(cmd, 23);
+	if (rc < 0)
+		return(rc);
+	if (sim_resp_sw != 0x9000) {
+		fprintf(stderr, "bad SW response: %04X\n", sim_resp_sw);
+		return(-1);
+	}
+	return(0);
+}