lib/services/add-list-element.js
'use strict';
const baAsn1 = require('../asn1');
const baEnum = require('../enum');
module.exports.encode = (buffer, objectId, propertyId, arrayIndex, values) => {
baAsn1.encodeContextObjectId(buffer, 0, objectId.type, objectId.instance);
baAsn1.encodeContextEnumerated(buffer, 1, propertyId);
if (arrayIndex !== baEnum.ASN1_ARRAY_ALL) {
baAsn1.encodeContextUnsigned(buffer, 2, arrayIndex);
}
baAsn1.encodeOpeningTag(buffer, 3);
values.forEach((value) => {
baAsn1.bacappEncodeApplicationData(buffer, value);
});
baAsn1.encodeClosingTag(buffer, 3);
};
module.exports.decode = (buffer, offset, apduLen) => {
let len = 0;
let result;
let decodedValue;
const value = {};
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
decodedValue = baAsn1.decodeObjectId(buffer, offset + len);
len += decodedValue.len;
value.objectId = {type: decodedValue.objectType, instance: decodedValue.instance};
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
decodedValue = baAsn1.decodeEnumerated(buffer, offset + len, result.value);
len += decodedValue.len;
value.property = {id: decodedValue.value};
if (len < apduLen && baAsn1.decodeIsContextTag(buffer, offset + len, 2)) {
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
decodedValue = baAsn1.decodeUnsigned(buffer, offset + len, result.value);
len += decodedValue.len;
value.property.index = decodedValue.value;
} else {
value.property.index = baEnum.ASN1_ARRAY_ALL;
}
const values = [];
if (!baAsn1.decodeIsOpeningTagNumber(buffer, offset + len, 3)) return;
len++;
while ((apduLen - len) > 1) {
result = baAsn1.bacappDecodeApplicationData(buffer, offset + len, apduLen + offset, value.objectId.type, value.property.id);
if (!result) return;
len += result.len;
delete result.len;
values.push(result);
}
value.values = values;
if (!baAsn1.decodeIsClosingTagNumber(buffer, offset + len, 3)) return;
len++;
value.len = len;
return value;
};