--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/simtool/hlread.c	Thu Feb 11 23:04:28 2021 +0000
@@ -0,0 +1,125 @@
+/*
+ * This module implements some high-level or user-friendly read commands.
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "simresp.h"
+#include "curfile.h"
+#include "file_id.h"
+
+encode_hex_digit(d)
+	unsigned d;
+{
+	if (d <= 9)
+		return(d + '0');
+	else
+		return(d - 10 + 'A');
+}
+
+decode_reversed_nibbles(bytes, nbytes, dest)
+	u_char *bytes;
+	unsigned nbytes;
+	char *dest;
+{
+	u_char *sp;
+	char *dp;
+	unsigned n, c;
+
+	sp = bytes;
+	dp = dest;
+	for (n = 0; n < nbytes; n++) {
+		c = *sp & 0xF;
+		*dp++ = encode_hex_digit(c);
+		c = *sp >> 4;
+		*dp++ = encode_hex_digit(c);
+		sp++;
+	}
+}
+
+cmd_iccid()
+{
+	int rc;
+	char buf[21];
+
+	rc = select_op(FILEID_MF);
+	if (rc < 0)
+		return(rc);
+	rc = select_op(EF_ICCID);
+	if (rc < 0)
+		return(rc);
+	rc = parse_ef_select_response();
+	if (rc < 0)
+		return(rc);
+	if (curfile_structure != 0x00 || curfile_total_size != 10) {
+		fprintf(stderr, "error: expected transparent EF of 10 bytes\n");
+		return(-1);
+	}
+	rc = readbin_op(0, 10);
+	if (rc < 0)
+		return(rc);
+	decode_reversed_nibbles(sim_resp_data, 10, buf);
+	buf[20] = '\0';
+	printf("%s\n", buf);
+	return(0);
+}
+
+cmd_imsi()
+{
+	int rc;
+	char buf[17];
+
+	rc = select_op(DF_GSM);
+	if (rc < 0)
+		return(rc);
+	rc = select_op(EF_IMSI);
+	if (rc < 0)
+		return(rc);
+	rc = parse_ef_select_response();
+	if (rc < 0)
+		return(rc);
+	if (curfile_structure != 0x00 || curfile_total_size != 9) {
+		fprintf(stderr, "error: expected transparent EF of 9 bytes\n");
+		return(-1);
+	}
+	rc = readbin_op(0, 9);
+	if (rc < 0)
+		return(rc);
+	decode_reversed_nibbles(sim_resp_data + 1, 8, buf);
+	buf[16] = '\0';
+	printf("%s parity=%c len=%u\n", buf + 1, buf[0], sim_resp_data[0]);
+	return(0);
+}
+
+cmd_spn()
+{
+	int rc;
+	unsigned textlen;
+
+	rc = select_op(DF_GSM);
+	if (rc < 0)
+		return(rc);
+	rc = select_op(EF_SPN);
+	if (rc < 0)
+		return(rc);
+	rc = parse_ef_select_response();
+	if (rc < 0)
+		return(rc);
+	if (curfile_structure != 0x00 || curfile_total_size != 17) {
+		fprintf(stderr, "error: expected transparent EF of 17 bytes\n");
+		return(-1);
+	}
+	rc = readbin_op(0, 17);
+	if (rc < 0)
+		return(rc);
+	printf("Display condition: %02X\n", sim_resp_data[0]);
+	printf("SPN: ");
+	rc = validate_alpha_field(sim_resp_data + 1, 16, &textlen);
+	if (rc >= 0)
+		print_alpha_field(sim_resp_data, textlen, stdout);
+	else
+		printf("malformed alpha field");
+	putchar('\n');
+	return(0);
+}