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52 lines (49 loc) · 2.01 KB
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'use strict';
const baAsn1 = require('../asn1');
module.exports.encode = (buffer, subscriberProcessId, monitoredObjectId, cancellationRequest, issueConfirmedNotifications, lifetime) => {
baAsn1.encodeContextUnsigned(buffer, 0, subscriberProcessId);
baAsn1.encodeContextObjectId(buffer, 1, monitoredObjectId.type, monitoredObjectId.instance);
if (!cancellationRequest) {
baAsn1.encodeContextBoolean(buffer, 2, issueConfirmedNotifications);
baAsn1.encodeContextUnsigned(buffer, 3, lifetime);
}
};
module.exports.decode = (buffer, offset, apduLen) => {
let len = 0;
let value = {};
let result;
let decodedValue;
if (!baAsn1.decodeIsContextTag(buffer, offset + len, 0)) return;
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
decodedValue = baAsn1.decodeUnsigned(buffer, offset + len, result.value);
len += decodedValue.len;
value.subscriberProcessId = decodedValue.value;
if (!baAsn1.decodeIsContextTag(buffer, offset + len, 1)) return;
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
decodedValue = baAsn1.decodeObjectId(buffer, offset + len);
len += decodedValue.len;
value.monitoredObjectId = {type: decodedValue.objectType, instance: decodedValue.instance};
value.cancellationRequest = true;
if (len < apduLen) {
value.issueConfirmedNotifications = false;
if (baAsn1.decodeIsContextTag(buffer, offset + len, 2)) {
value.cancellationRequest = false;
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
value.issueConfirmedNotifications = buffer[offset + len] > 0;
len++;
}
value.lifetime = 0;
if (baAsn1.decodeIsContextTag(buffer, offset + len, 3)) {
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
decodedValue = baAsn1.decodeUnsigned(buffer, offset + len, result.value);
len += decodedValue.len;
value.lifetime = decodedValue.value;
}
}
value.len = len;
return value;
};