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/* eslint-disable @typescript-eslint/explicit-function-return-type */
import * as pvtsutils from "pvtsutils";
import { IBerConvertible } from "./types";
import { EMPTY_BUFFER, EMPTY_VIEW } from "./internals/constants";
import { LocalBaseBlockConstructor } from "./internals/LocalBaseBlock";
import { checkBufferParams } from "./internals/utils";
export interface IHexBlock {
isHexOnly: boolean;
valueHex: pvtsutils.BufferSource;
}
export interface HexBlockJson extends Omit<IHexBlock, "valueHex"> {
valueHex: string;
}
export type HexBlockParams = Partial<IHexBlock>;
/**
* Class used as a base block for all remaining ASN.1 classes
*/
export function HexBlock<T extends LocalBaseBlockConstructor>(BaseClass: T) {
return class Some extends BaseClass implements IHexBlock, IBerConvertible {
public static override NAME = "hexBlock";
public isHexOnly: boolean;
/**
* Binary data in ArrayBuffer representation
*
* @deprecated since version 3.0.0
*/
public get valueHex(): ArrayBuffer {
return this.valueHexView.slice().buffer;
}
/**
* Binary data in ArrayBuffer representation
*
* @deprecated since version 3.0.0
*/
public set valueHex(value: ArrayBuffer) {
this.valueHexView = new Uint8Array(value);
}
/**
* Binary data in Uint8Array representation
*
* @since 3.0.0
*/
public valueHexView: Uint8Array;
constructor(...args: any[]) {
super(...args);
const params: HexBlockParams = args[0] || {};
this.isHexOnly = params.isHexOnly ?? false;
this.valueHexView = params.valueHex ? pvtsutils.BufferSourceConverter.toUint8Array(params.valueHex) : EMPTY_VIEW;
}
public fromBER(inputBuffer: ArrayBuffer | Uint8Array, inputOffset: number, inputLength: number): number {
// Basic check for parameters
const view = inputBuffer instanceof ArrayBuffer ? new Uint8Array(inputBuffer) : inputBuffer;
if (!checkBufferParams(this, view, inputOffset, inputLength)) {
return -1;
}
const endLength = inputOffset + inputLength;
// Initial checks
this.valueHexView = view.subarray(inputOffset, endLength);
if (!this.valueHexView.length) {
this.warnings.push("Zero buffer length");
return inputOffset;
}
this.blockLength = inputLength;
return endLength;
}
public toBER(sizeOnly = false): ArrayBuffer {
if (!this.isHexOnly) {
this.error = "Flag 'isHexOnly' is not set, abort";
return EMPTY_BUFFER;
}
if (sizeOnly) {
return new ArrayBuffer(this.valueHexView.byteLength);
}
// Don't copy data if View is not offset
return (this.valueHexView.byteLength === this.valueHexView.buffer.byteLength)
? this.valueHexView.buffer
: this.valueHexView.slice().buffer;
}
/**
* Returns a JSON representation of an object
* @returns JSON object
*/
public override toJSON() {
return {
...super.toJSON(),
isHexOnly: this.isHexOnly,
valueHex: pvtsutils.Convert.ToHex(this.valueHexView),
};
}
};
}
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