--- a/uicc/select.c	Thu Feb 04 01:45:16 2021 +0000
+++ b/uicc/select.c	Thu Feb 04 02:28:52 2021 +0000
@@ -151,3 +151,75 @@
 		return(rc);
 	return parse_and_display_select_response();
 }
+
+u_char *
+extract_select_resp_tag(sought_tag)
+	unsigned sought_tag;
+{
+	unsigned offset, totlen, reclen;
+	u_char *dp, *endp;
+	int rc;
+
+	rc = select_resp_header_check(&offset, &totlen);
+	if (rc < 0)
+		return(0);
+	dp = sim_resp_data + offset;
+	endp = sim_resp_data + offset + totlen;
+	while (dp < endp) {
+		if (endp - dp < 2) {
+trunc_error:		fprintf(stderr,
+			"error: truncated TLV record in SELECT response\n");
+			return(0);
+		}
+		if ((dp[0] & 0x1F) == 0x1F) {
+			fprintf(stderr,
+		"error: extended tag not supported in SELECT response\n");
+			return(0);
+		}
+		if (dp[1] & 0x80) {
+			fprintf(stderr,
+		"error: extended length not supported in SELECT response\n");
+			return(0);
+		}
+		reclen = dp[1] + 2;
+		if (endp - dp < reclen)
+			goto trunc_error;
+		if (dp[0] == sought_tag)
+			return(dp);
+		dp += reclen;
+	}
+	fprintf(stderr, "error: tag 0x%02X not found in SELECT response\n",
+		sought_tag);
+	return(0);
+}
+
+select_resp_get_transparent(lenp)
+	unsigned *lenp;
+{
+	u_char *tlv;
+
+	tlv = extract_select_resp_tag(0x82);
+	if (!tlv)
+		return(-1);
+	if (tlv[1] != 2) {
+bad_file_desc:	fprintf(stderr, "error: file type is not transparent EF\n");
+		return(-1);
+	}
+	if (tlv[2] & 0x80)
+		goto bad_file_desc;
+	if ((tlv[2] & 0x38) == 0x38)
+		goto bad_file_desc;
+	if ((tlv[2] & 0x07) != 0x01)
+		goto bad_file_desc;
+	tlv = extract_select_resp_tag(0x80);
+	if (!tlv)
+		return(-1);
+	if (tlv[1] != 2) {
+		fprintf(stderr,
+			"error: file size TLV element has wrong length\n");
+		return(-1);
+	}
+	if (lenp)
+		*lenp = (tlv[2] << 8) | tlv[3];
+	return(0);
+}