assertNotNull(derivedKey);
        assertEquals(16, derivedKey.length);

        // Test with a different key size
        KerberosKey key256 = new KerberosKey(TEST_PRINCIPAL, new byte[32], PacSignature.ETYPE_AES256_CTS_HMAC_SHA1_96, 0);
        byte[] derivedKey256 = PacMac.deriveKeyAES(key256, constant);
        assertNotNull(derivedKey256);
        assertEquals(32, derivedKey256.length);
    }

    /**

                                  ExtraArgs={'ServerSideEncryption': 'AES256'})

# Upload with server side encryption, using temporary credentials
s3.meta.client.upload_file('/etc/hosts',
                           'testbucket',
                           'hosts',
                           ExtraArgs={'ServerSideEncryption': 'AES256'})

# Download encrypted object using temporary credentials

```
read EC key
writing EC key
```

Alternatively, use the following command to generate a private ECDSA key protected by a password:

```sh
openssl ecparam -genkey -name prime256v1 | openssl ec -aes256 -out private.key -passout pass:PASSWORD
```

#### 3.2.2 Generate a private key with RSA

Use the following command to generate a private key with RSA:

```sh
openssl genrsa -out private.key 2048
```

	{URL: &url.URL{}, Header: http.Header{xhttp.AmzServerSideEncryptionCustomerAlgorithm: []string{"AES256"}}, IsTLS: false, ShouldFail: true}, // 1
	{URL: &url.URL{}, Header: http.Header{xhttp.AmzServerSideEncryptionCustomerAlgorithm: []string{"AES256"}}, IsTLS: true, ShouldFail: false}, // 2

```

`--sftp=cipher-algos=...` specifies the allowed cipher algorithms. 
If unspecified then a sensible default is used.

Valid values: 
```
aes128-ctr
aes192-ctr
aes256-ctr
******@****.***
aes256******@****.***
******@****.***
arcfour256
arcfour128
arcfour
aes128-cbc
3des-cbc
```

		shouldPass  bool
	}{
		// MinIO supported XML
		{
			inputXML: `<ServerSideEncryptionConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
			<Rule>
			<ApplyServerSideEncryptionByDefault>
			<SSEAlgorithm>AES256</SSEAlgorithm>
			</ApplyServerSideEncryptionByDefault>
			</Rule>
			</ServerSideEncryptionConfiguration>`,
			expectedErr: nil,
			shouldPass:  true,
		},
		// Unsupported XML
		{

```

```
mc stat myminio/bucket/test.file
Name      : test.file
...
Encrypted :
  X-Amz-Server-Side-Encryption: AES256
```

## Encrypted Private Key

MinIO supports encrypted KES client private keys. Therefore, you can use
an password-protected private keys for `MINIO_KMS_KES_KEY_FILE`.