if err != nil {
			return
		}
		if sse, err = encrypt.NewSSEC(clientKey[:]); err != nil {
			return
		}
		opts.ServerSideEncryption = sse
		return
	}
	if crypto.S3.IsRequested(header) || (metadata != nil && crypto.S3.IsEncrypted(metadata)) {
		opts.ServerSideEncryption = encrypt.NewSSE()
	}

	return
}

// get ObjectOptions for GET calls from encryption headers

			writeErrorResponse(ctx, w, toAPIError(ctx, crypto.ErrIncompatibleEncryptionMethod), r.URL)
			return
		}

		_, sourceReplReq := r.Header[xhttp.MinIOSourceReplicationRequest]
		ssecRepHeaders := []string{
			"X-Minio-Replication-Server-Side-Encryption-Seal-Algorithm",
			"X-Minio-Replication-Server-Side-Encryption-Sealed-Key",

import static org.apache.maven.cling.invoker.mvnenc.DefaultEncryptInvoker.OK;

/**
 * The "encrypt" goal.
 */
@Singleton
@Named("encrypt")
public class Encrypt extends ConfiguredGoalSupport {
    @Inject
    public Encrypt(MessageBuilderFactory messageBuilderFactory, SecDispatcher secDispatcher) {
        super(messageBuilderFactory, secDispatcher);
    }

    @Override

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package crypto

import (
	"github.com/minio/minio/internal/config"
	"github.com/minio/pkg/v3/env"
)

const (
	// EnvKMSAutoEncryption is the environment variable used to en/disable
	// SSE-S3 auto-encryption. SSE-S3 auto-encryption, if enabled,
	// requires a valid KMS configuration and turns any non-SSE-C
	// request into an SSE-S3 request.

import java.security.Provider;

import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;

import org.bouncycastle.jce.provider.BouncyCastleProvider;

import jcifs.CIFSUnsupportedCryptoException;


/**
 * @author mbechler
 *
 */
public final class Crypto {

    private static Provider provider = null;


    /**
     * 

package crypto

import (
	"context"
	"errors"
	"fmt"
	"io"
	"net/http"

	"github.com/minio/minio/internal/fips"
	"github.com/minio/minio/internal/ioutil"
	"github.com/minio/minio/internal/logger"
	"github.com/minio/sio"
)

const (
	// SealAlgorithm is the encryption/sealing algorithm used to derive & seal
	// the key-encryption-key and to en/decrypt the object data.

}

// IsEncrypted reports whether the ETag is encrypted.
func (e ETag) IsEncrypted() bool {
	// An encrypted ETag must be at least 32 bytes long.
	// It contains the encrypted ETag value + an authentication
	// code generated by the AEAD cipher.
	//
	// Here is an incorrect implementation of IsEncrypted:
	//
	//   return len(e) > 16 && !bytes.ContainsRune(e, '-')
	//
	// An encrypted ETag may contain some random bytes - e.g.

* Nginx
* HAProxy

## Let's Encrypt

Before Let's Encrypt, these **HTTPS certificates** were sold by trusted third parties.

The process to acquire one of these certificates used to be cumbersome, require quite some paperwork and the certificates were quite expensive.

But then **<a href="https://letsencrypt.org/" class="external-link" target="_blank">Let's Encrypt</a>** was created.

## Acronyms

- **AEAD**: Authenticated Encryption with Associated Data
- **CSPRNG**: Cryptographically Secure Pseudo Random Number Generator
- **EK**: External Key
- **IV**: Initialization Vector
- **KEK**: Key Encryption Key
- **OEK**: Object Encryption Key
- **PRF**: Pseudo Random Function
- **SSE**: Server-Side Encryption
- **SSE-C**: Server-Side Encryption with client-provided Keys

## FAQ

> Why is this change needed?

Before, there were two separate mechanisms - S3 objects got encrypted using a KMS,
if present, and the IAM / configuration data got encrypted with the root credentials.
Now, MinIO encrypts IAM / configuration and S3 objects with a KMS, if present. This