tink-crypto/esm2015/hybrid/internal/hpke/hpke_kem_key_factory.js

A multi-language, cross-platform library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

/**
 * @license
 * Copyright 2023 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { InvalidArgumentsException } from '../../../exception/invalid_arguments_exception';
import { PbHpkeKem } from '../../../internal/proto';
import { bytesAsU8 } from '../../../internal/proto_shims';
import * as hpkeUtil from './hpke_util';
import * as nistCurvesHpkeKemPrivateKey from './nist_curves_hpke_kem_private_key';
/** Helper class for creating HPKE KEM asymmetric keys. */
export class HpkeKemKeyFactory {
    constructor() { }
    static createPrivate(privateKey) {
        const publicKey = privateKey.getPublicKey();
        if (!publicKey) {
            throw new InvalidArgumentsException('Public key not set');
        }
        const params = publicKey.getParams();
        if (!params) {
            throw new InvalidArgumentsException('Params not set');
        }
        switch (params.getKem()) {
            case PbHpkeKem.DHKEM_P256_HKDF_SHA256:
            case PbHpkeKem.DHKEM_P521_HKDF_SHA512:
                return nistCurvesHpkeKemPrivateKey.fromBytes({
                    privateKey: bytesAsU8(privateKey.getPrivateKey()),
                    publicKey: bytesAsU8(publicKey.getPublicKey()),
                    curveType: hpkeUtil.nistHpkeKemToCurve(params.getKem())
                });
            default:
                throw new InvalidArgumentsException('Unrecognized HPKE KEM identifier');
        }
    }
}
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