export function makeDERLength(length) {
if (length < 0x80) {
return [length];
}
var r = [];
while (true) {
r.push(length & 0xff);
if (length < 0x100) {
break;
}
length >>= 8;
}
r.push(0x80 + r.length);
return r.reverse();
}
export function makeDERIA5String(text) {
// convert to char-code array and filter to [0-127]
var r = [].map
.call(text, function (c) { return c.charCodeAt(0); })
.filter(function (n) { return n < 128; });
return [0x16].concat(makeDERLength(r.length)).concat(r);
}
export function makeDERBMPString(text) {
// convert to char-code array
// NOTE: In ECMAScript `charCodeAt` returns surrogate pair for >=0x10000 codes,
// and surrogate pair is valid for BMPString data
var r = [].map.call(text, function (c) { return c.charCodeAt(0); });
var ua = new Uint8Array(r.length * 2);
var dv = new DataView(ua.buffer);
// store codes as big-endian
r.forEach(function (v, i) {
dv.setUint16(i * 2, v, false);
});
return [0x1e].concat(makeDERLength(ua.length)).concat(
// convert Uint8Array to number[] (not using spread operator)
[].slice.call(ua));
}
export function makeDEROctetString(bin) {
if (!(bin instanceof Array)) {
// convert Uint8Array to number[] (not using spread operator)
bin = [].slice.call(bin);
}
return [0x04].concat(makeDERLength(bin.length)).concat(bin);
}
export function makeDERTaggedData(tag, body) {
return [0xa0 + tag].concat(makeDERLength(body.length)).concat(body);
}
export function makeDERSequence(body) {
return [0x30].concat(makeDERLength(body.length)).concat(body);
}
export function arrayToDERSet(items) {
var r = items.reduce(function (prev, item) {
return prev.concat(item instanceof Array ? item : item.toDER());
}, []);
return [0x31].concat(makeDERLength(r.length)).concat(r);
}