mac := hmac.New(sha256.New, extKey)
	mac.Write([]byte(Context))
	mac.Write(nonce[:])
	mac.Sum(key[:0])
	return key
}

// GenerateIV generates a new random 256 bit IV from the provided source
// of randomness. If random is nil the default PRNG of the system
// (crypto/rand) is used.
func GenerateIV(random io.Reader) (iv [32]byte) {
	if random == nil {
		random = rand.Reader
	}
	if _, err := io.ReadFull(random, iv[:]); err != nil {

          schema:
            type: array
            items:
              type: string
            example: [label]
        - name: field
          in: query
          description: Field name to generate suggest words
          required: false
          style: form
          explode: true
          schema:
            type: array
            items:
              type: string
            example: [python]

        byte[] hash1 = md5_1.digest(data);
        byte[] hash2 = md5_2.digest(data);

        // Then
        assertArrayEquals(hash1, hash2);
    }

    @Test
    @DisplayName("Should generate secure random bytes")
    void testSecureRandomGeneration() throws java.security.NoSuchAlgorithmException {
        // Given
        int length = 16;

        // When
        byte[] random1 = new byte[length];

  // (1) 00 01 02 03 04 05 06 07 80
  // (2) 00 01 02 03 04 05 06 07 81
  // (3) 00 01 02 03 04 05 06 07 ff (or anything in between)
  // A fault implementation will generate collisions for these inputs.
  public void testCollisionsDueToIncorrectSignExtension() {
    byte[] col1 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0x80};

  // (1) 00 01 02 03 04 05 06 07 80
  // (2) 00 01 02 03 04 05 06 07 81
  // (3) 00 01 02 03 04 05 06 07 ff (or anything in between)
  // A fault implementation will generate collisions for these inputs.
  public void testCollisionsDueToIncorrectSignExtension() {
    byte[] col1 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0x80};

// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//

        final ExecutorService executorService = Executors.newFixedThreadPool(options.numOfThreads);
        try {
            while (count != 0) {
                count = ComponentUtil.getThumbnailManager().generate(executorService, options.cleanup);
                totalCount += count;
            }
            executorService.shutdown();
            executorService.awaitTermination(60, TimeUnit.SECONDS);

// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//

### 通常の **FastAPI** { #normal-fastapi }

まず、通常どおりに **FastAPI** アプリケーションを実装します:

{* ../../docs_src/extending_openapi/tutorial001_py310.py hl[1,4,7:9] *}

### OpenAPI スキーマの生成 { #generate-the-openapi-schema }

次に、`custom_openapi()` 関数内で同じユーティリティ関数を使って OpenAPI スキーマを生成します:

{* ../../docs_src/extending_openapi/tutorial001_py310.py hl[2,15:21] *}

### OpenAPI スキーマの変更 { #modify-the-openapi-schema }

     * Sets the public/private key pair used for this certificate. If unset a key pair will be
     * generated.
     */
    fun keyPair(keyPair: KeyPair) =
      apply {
        this.keyPair = keyPair
      }

    /**
     * Sets the public/private key pair used for this certificate. If unset a key pair will be
     * generated.
     */
    fun keyPair(
      publicKey: PublicKey,
      privateKey: PrivateKey,