@unvision/jose
Version:
Implementation of the RFCs of the JOSE Working Group.
45 lines • 2.06 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.JsonWebSignatureAlgorithm = void 0;
const invalid_jsonwebkey_exception_1 = require("../../exceptions/invalid-jsonwebkey.exception");
const jsonwebkey_1 = require("../../jwk/jsonwebkey");
/**
* Abstract Base Class for the JSON Web Signature Algorithm.
*
* All JSON Web Signature Algorithms **MUST** extend this base class and implement its abstract methods.
*
* @see https://www.rfc-editor.org/rfc/rfc7518.html#section-3
*/
class JsonWebSignatureAlgorithm {
/**
* Instantiates a new JSON Web Signature Algorithm to Sign and Verify Messages.
*
* @param algorithm Name of the JSON Web Signature Algorithm.
* @param hash Hash Algorithm used to Sign and Verify Messages.
* @param keyType Type of JSON Web Key supported by this JSON Web Signature Algorithm.
*/
constructor(algorithm, hash, keyType) {
this.algorithm = algorithm;
this.hash = hash;
this.keyType = keyType;
}
/**
* Checks if the provided JSON Web Key can be used by the requesting JSON Web Signature Algorithm.
*
* @param key JSON Web Key to be checked.
* @throws {InvalidJsonWebKeyException} The provided JSON Web Key is invalid.
*/
validateJsonWebKey(key) {
if (!(key instanceof jsonwebkey_1.JsonWebKey)) {
throw new invalid_jsonwebkey_exception_1.InvalidJsonWebKeyException();
}
if (key.alg !== undefined && key.alg !== this.algorithm) {
throw new invalid_jsonwebkey_exception_1.InvalidJsonWebKeyException(`This JSON Web Key is intended to be used by the Algorithm "${key.alg}".`);
}
if (this.keyType !== undefined && key.kty !== this.keyType) {
throw new invalid_jsonwebkey_exception_1.InvalidJsonWebKeyException(`This JSON Web Signature Algorithm only accepts "${this.keyType}" JSON Web Keys.`);
}
}
}
exports.JsonWebSignatureAlgorithm = JsonWebSignatureAlgorithm;
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