tink-crypto/esm2015/hybrid/internal/hpke/hpke_primitive_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 { PbHpkeAead, PbHpkeKdf, PbHpkeKem } from '../../../internal/proto';
import * as ellipticCurves from '../../../subtle/elliptic_curves';
import { AesGcmHpkeAead } from './aes_gcm_hpke_aead';
import { HkdfHpkeKdf } from './hkdf_hpke_kdf';
import * as hpkeUtil from './hpke_util';
import { NistCurvesHpkeKem } from './nist_curves_hpke_kem';
/**
 * Helper class for creating HPKE primitives from either algorithm identifiers
 * or HpkeParams.
 */
export class HpkePrimitiveFactory {
    constructor() { }
    /** Returns an HpkeKem primitive corresponding to the kemId. */
    static createKemFromId(kemId) {
        switch (kemId) {
            case hpkeUtil.P256_HKDF_SHA256_KEM_ID:
                return NistCurvesHpkeKem.fromCurve(ellipticCurves.CurveType.P256);
            case hpkeUtil.P521_HKDF_SHA512_KEM_ID:
                return NistCurvesHpkeKem.fromCurve(ellipticCurves.CurveType.P521);
            default:
                throw new InvalidArgumentsException('Unrecognized HPKE KEM identifier');
        }
    }
    /** Returns an HpkeKem primitive corresponding to the given parameters. */
    static createKemFromParams(params) {
        switch (params.getKem()) {
            case PbHpkeKem.DHKEM_P256_HKDF_SHA256:
                return NistCurvesHpkeKem.fromCurve(ellipticCurves.CurveType.P256);
            case PbHpkeKem.DHKEM_P521_HKDF_SHA512:
                return NistCurvesHpkeKem.fromCurve(ellipticCurves.CurveType.P521);
            default:
                throw new InvalidArgumentsException('Unrecognized HPKE KEM identifier');
        }
    }
    /** Returns an HpkeKdf primitive corresponding to the kdfId. */
    static createKdfFromId(kdfId) {
        switch (kdfId) {
            case hpkeUtil.HKDF_SHA256_KDF_ID:
                return new HkdfHpkeKdf('SHA-256');
            case hpkeUtil.HKDF_SHA512_KDF_ID:
                return new HkdfHpkeKdf('SHA-512');
            default:
                throw new InvalidArgumentsException('Unrecognized HPKE KDF identifier');
        }
    }
    /** Returns an HpkeKdf primitive corresponding to the given parameters. */
    static createKdfFromParams(params) {
        switch (params.getKdf()) {
            case PbHpkeKdf.HKDF_SHA256:
                return new HkdfHpkeKdf('SHA-256');
            case PbHpkeKdf.HKDF_SHA512:
                return new HkdfHpkeKdf('SHA-512');
            default:
                throw new InvalidArgumentsException('Unrecognized HPKE KDF identifier');
        }
    }
    /** Returns an HpkeAead primitive corresponding to the aeadId. */
    static createAeadFromId(aeadId) {
        switch (aeadId) {
            case hpkeUtil.AES_128_GCM_AEAD_ID:
                return new AesGcmHpkeAead(16);
            case hpkeUtil.AES_256_GCM_AEAD_ID:
                return new AesGcmHpkeAead(32);
            default:
                throw new InvalidArgumentsException('Unrecognized HPKE AEAD identifier');
        }
    }
    /** Returns an HpkeAead primitive corresponding to the given parameters. */
    static createAeadFromParams(params) {
        switch (params.getAead()) {
            case PbHpkeAead.AES_128_GCM:
                return new AesGcmHpkeAead(16);
            case PbHpkeAead.AES_256_GCM:
                return new AesGcmHpkeAead(32);
            default:
                throw new InvalidArgumentsException('Unrecognized HPKE AEAD identifier');
        }
    }
}
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