pooja-docucomb-tink-crypto/aead/aes_ctr_hmac_aead_key_templates_test.ts

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

/**
 * @license
 * Copyright 2020 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import {PbAesCtrHmacAeadKeyFormat, PbHashType, PbOutputPrefixType} from '../internal/proto';
import {bytesAsU8} from '../internal/proto_shims';

import {AesCtrHmacAeadKeyManager} from './aes_ctr_hmac_aead_key_manager';
import {AesCtrHmacAeadKeyTemplates} from './aes_ctr_hmac_aead_key_templates';

describe('aes ctr hmac aead key templates test', function() {
  it('aes128 ctr hmac sha256', function() {
    // Expects function to create key with following parameters.
    const expectedAesKeySize = 16;
    const expectedIvSize = 16;
    const expectedHmacKeySize = 32;
    const expectedTagSize = 16;
    const expectedHashFunction = PbHashType.SHA256;
    const expectedOutputPrefix = PbOutputPrefixType.TINK;

    // Expected type URL is the one supported by AesCtrHmacAeadKeyManager.
    const manager = new AesCtrHmacAeadKeyManager();
    const expectedTypeUrl = manager.getKeyType();

    const keyTemplate = AesCtrHmacAeadKeyTemplates.aes128CtrHmacSha256();

    expect(keyTemplate.getTypeUrl()).toBe(expectedTypeUrl);
    expect(keyTemplate.getOutputPrefixType()).toBe(expectedOutputPrefix);

    // Test values in key format.
    const keyFormat =
        PbAesCtrHmacAeadKeyFormat.deserializeBinary(keyTemplate.getValue());

    // Test AesCtrKeyFormat.
    const aesCtrKeyFormat = keyFormat.getAesCtrKeyFormat();
    expect(aesCtrKeyFormat!.getKeySize()).toBe(expectedAesKeySize);
    expect(aesCtrKeyFormat!.getParams()!.getIvSize()).toBe(expectedIvSize);

    // Test HmacKeyFormat.
    const hmacKeyFormat = keyFormat.getHmacKeyFormat();
    expect(hmacKeyFormat!.getKeySize()).toBe(expectedHmacKeySize);
    expect(hmacKeyFormat!.getParams()!.getTagSize()).toBe(expectedTagSize);
    expect(hmacKeyFormat!.getParams()!.getHash()).toBe(expectedHashFunction);

    // Test that the template works with AesCtrHmacAeadKeyManager.
    manager.getKeyFactory().newKey(bytesAsU8(keyTemplate.getValue()));
  });

  it('aes256 ctr hmac sha256', function() {
    // Expects function to create key with following parameters.
    const expectedAesKeySize = 32;
    const expectedIvSize = 16;
    const expectedHmacKeySize = 32;
    const expectedTagSize = 32;
    const expectedHashFunction = PbHashType.SHA256;
    const expectedOutputPrefix = PbOutputPrefixType.TINK;

    // Expected type URL is the one supported by AesCtrHmacAeadKeyManager.
    const manager = new AesCtrHmacAeadKeyManager();
    const expectedTypeUrl = manager.getKeyType();

    const keyTemplate = AesCtrHmacAeadKeyTemplates.aes256CtrHmacSha256();

    expect(keyTemplate.getTypeUrl()).toBe(expectedTypeUrl);
    expect(keyTemplate.getOutputPrefixType()).toBe(expectedOutputPrefix);

    // Test values in key format.
    const keyFormat =
        PbAesCtrHmacAeadKeyFormat.deserializeBinary(keyTemplate.getValue());

    // Test AesCtrKeyFormat.
    const aesCtrKeyFormat = keyFormat.getAesCtrKeyFormat();
    expect(aesCtrKeyFormat!.getKeySize()).toBe(expectedAesKeySize);
    expect(aesCtrKeyFormat!.getParams()!.getIvSize()).toBe(expectedIvSize);

    // Test HmacKeyFormat.
    const hmacKeyFormat = keyFormat.getHmacKeyFormat();
    expect(hmacKeyFormat!.getKeySize()).toBe(expectedHmacKeySize);
    expect(hmacKeyFormat!.getParams()!.getTagSize()).toBe(expectedTagSize);
    expect(hmacKeyFormat!.getParams()!.getHash()).toBe(expectedHashFunction);

    // Test that the template works with AesCtrHmacAeadKeyManager.
    manager.getKeyFactory().newKey(bytesAsU8(keyTemplate.getValue()));
  });
});