return
	}
	b.AddUint8(uint8(tag))
	b.addLengthPrefixed(1, true, f)
}

// String

// ReadASN1Boolean decodes an ASN.1 BOOLEAN and converts it to a boolean
// representation into out and advances. It reports whether the read
// was successful.
func (s *String) ReadASN1Boolean(out *bool) bool {
	var bytes String
	if !s.ReadASN1(&bytes, asn1.BOOLEAN) || len(bytes) != 1 {
		return false
	}

	var ext pkix.Extension
	if !der.ReadASN1ObjectIdentifier(&ext.Id) {
		return ext, errors.New("x509: malformed extension OID field")
	}
	if der.PeekASN1Tag(cryptobyte_asn1.BOOLEAN) {
		if !der.ReadASN1Boolean(&ext.Critical) {
			return ext, errors.New("x509: malformed extension critical field")
		}
	}
	var val cryptobyte.String
	if !der.ReadASN1(&val, cryptobyte_asn1.OCTET_STRING) {