Process PrintableString and UTF8String ASN.1 types

decode.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"reflect"
 	"sort"
+	"time"
 )
 
 // Expected values
@@ -327,6 +328,10 @@ func (ctx *Context) getUniversalTagByKind(objType reflect.Type, opts *fieldOptio
 			elem.decoder = ctx.decodeSlice
 		}
 	}
+	if objType == reflect.TypeOf(time.Time{}) {
+		elem.tag = tagUtcTime
+		elem.decoder = ctx.decodeUtcTime
+	}
 	return
 }
 
@@ -405,6 +410,9 @@ func (ctx *Context) matchExpectedValues(eValues []expectedFieldElement, rValues
 		missing := true
 		if rIndex < len(rValues) {
 			raw := rValues[rIndex]
+			if raw.Tag == tagPrintableString || raw.Tag == tagUTF8String || raw.Tag == tagBitString {
+				raw.Tag = tagOctetString
+			}
 			if e.class == raw.Class && e.tag == raw.Tag {
 				err := e.decoder(raw.Content, e.value)
 				if err != nil {

raw.go

@@ -24,6 +24,7 @@ const (
 	tagOctetString     = 0x04
 	tagNull            = 0x05
 	tagOid             = 0x06
+	tagUTF8String      = 0x0c
 	tagSequence        = 0x10
 	tagSet             = 0x11
 	tagPrintableString = 0x13

types.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"math/big"
 	"reflect"
+	"time"
 )
 
 // Pre-calculated types for convenience
@@ -343,6 +344,16 @@ func (ctx *Context) decodeNull(data []byte, value reflect.Value) error {
 	return nil
 }
 
+func (ctx *Context) decodeUtcTime(data []byte, value reflect.Value) error {
+	// Check type
+	type1 := value.Type()
+	if !(type1 == reflect.TypeOf(time.Time{})) {
+		// Invalid type or element type
+		return wrongType("time.Time", value)
+	}
+	return nil
+}
+
 /*
  * Helper functions
  */