57 lines
1.6 KiB
TypeScript
57 lines
1.6 KiB
TypeScript
import { Buffer } from "buffer";
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import { AsnParser, AsnSerializer } from "@peculiar/asn1-schema";
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import {
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IJsonConvertible,
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JsonParser,
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JsonSerializer,
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} from "@peculiar/json-schema";
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import * as core from "webcrypto-core";
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import { getOidByNamedCurve } from "./helper";
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import { AsymmetricKey } from "../../keys/asymmetric";
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export class EcPublicKey extends AsymmetricKey implements IJsonConvertible {
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public readonly type = "public" as const;
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public override algorithm!: EcKeyAlgorithm;
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public getKey() {
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const keyInfo = AsnParser.parse(this.data, core.asn1.PublicKeyInfo);
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return new core.asn1.EcPublicKey(keyInfo.publicKey);
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}
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public toJSON() {
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const key = this.getKey();
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const json: JsonWebKey = {
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kty: "EC",
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crv: this.algorithm.namedCurve,
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key_ops: this.usages,
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ext: this.extractable,
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};
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return Object.assign(json, JsonSerializer.toJSON(key));
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}
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public fromJSON(json: JsonWebKey) {
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if (!json.crv) {
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throw new core.OperationError(
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`Cannot get named curve from JWK. Property 'crv' is required`
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);
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}
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const key = JsonParser.fromJSON(json, {
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targetSchema: core.asn1.EcPublicKey,
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});
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const keyInfo = new core.asn1.PublicKeyInfo();
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keyInfo.publicKeyAlgorithm.algorithm = "1.2.840.10045.2.1";
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keyInfo.publicKeyAlgorithm.parameters = AsnSerializer.serialize(
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new core.asn1.ObjectIdentifier(getOidByNamedCurve(json.crv))
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);
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keyInfo.publicKey = (AsnSerializer.toASN(key) as any).valueHex;
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this.data = Buffer.from(AsnSerializer.serialize(keyInfo));
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return this;
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}
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}
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