--- a/src/lib/BasicASN1Reader.h	Sun Jun 27 19:22:23 2021 +0200
+++ b/src/lib/BasicASN1Reader.h	Mon Jun 28 22:48:04 2021 +0200
@@ -20,6 +20,7 @@
 #include <vector>
 #include <array>
 #include <sstream>
+#include <regex>
 
 #include "ASN1Reader.h"
 
@@ -174,6 +175,36 @@
 			s.resize(typeHeader.length);
 			read((uint8_t*) s.data(), typeHeader.length);
 			handlers.writeString(ASN1ContentHandler::StringType::PrintableString, s);
+		} else if (typeHeader.tag == 0x17 && typeHeader.tagClass == TagClass::Universal && typeHeader.definiteLength) {
+			// TODO: check available bytes before allocating buffer
+			std::string s;
+			s.resize(typeHeader.length);
+			read((uint8_t*) s.data(), typeHeader.length);
+
+			ASN1ContentHandler::DateTime dateTime;
+
+			std::smatch match;
+			if (std::regex_match(s, match, std::regex("([0-9]{2})([0-9]{2})([0-9]{2})([0-9]{2})([0-9]{2})([0-9]{2})Z"))) {
+				int i = 1;
+				uint32_t year = std::stoi(match[i++]);
+				dateTime.year = year < 50 ? 2000 + year : 1900 + year;
+				dateTime.month = std::stoi(match[i++]);
+				dateTime.day = std::stoi(match[i++]);
+				dateTime.hour = std::stoi(match[i++]);
+				dateTime.minute = std::stoi(match[i++]);
+				dateTime.precision = ASN1ContentHandler::DateTime::Precision::Second;
+				handlers.writeDateTime(ASN1ContentHandler::DateTimeType::UTCTime, dateTime);
+			} else {
+				// FIXME: decode more UTCTime formats:
+				// YYMMDDhhmmZ
+				// YYMMDDhhmm+hh'mm'
+				// YYMMDDhhmm-hh'mm'
+				// YYMMDDhhmmssZ
+				// YYMMDDhhmmss+hh'mm'
+				// YYMMDDhhmmss-hh'mm'
+				handlers.writeString(ASN1ContentHandler::StringType::UTF8String, "FIXME: UTCTime format not yet supported: " + s);
+			}
+
 		} else {
 			// TODO: do not skip, parse
 			std::vector<uint8_t> temp(typeHeader.length, 0);