}
	}

	_, encrypted = crypto.IsEncrypted(info.UserDefined)
	if !encrypted && crypto.SSEC.IsRequested(headers) && r.Header.Get(xhttp.AmzCopySource) == "" {
		return false, errInvalidEncryptionParameters
	}

	if encrypted {
		if crypto.SSEC.IsEncrypted(info.UserDefined) {
			if !(crypto.SSEC.IsRequested(headers) || crypto.SSECopy.IsRequested(headers)) {

		} else if _, enc := crypto.IsEncrypted(test.info.UserDefined); encrypted && enc != encrypted {
			t.Errorf("Test %d: Decryption thinks object is encrypted but it is not", i)
		} else if !encrypted && enc != encrypted {
			t.Errorf("Test %d: Decryption thinks object is not encrypted but it is", i)
		}
	}
}

var decryptETagTests = []struct {
	ObjectKey  crypto.ObjectKey
	ObjectInfo ObjectInfo

		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",

}

// 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

# Stat the objects from source site
echo "Stat minio1/test-bucket/encrypted"
./mc stat --no-list minio1/test-bucket/encrypted --insecure --json
stat_out1=$(./mc stat --no-list minio1/test-bucket/encrypted --insecure --json)
src_obj1_algo=$(echo "${stat_out1}" | jq '.metadata."X-Amz-Server-Side-Encryption"')
src_obj1_keyid=$(echo "${stat_out1}" | jq '.metadata."X-Amz-Server-Side-Encryption-Aws-Kms-Key-Id"')
echo "Stat minio1/test-bucket/defpartsize"

                if ( log.isDebugEnabled() ) {
                    log.debug("Encrypted " + Hexdump.toHexString(trunc));
                }
            }
            catch ( GeneralSecurityException e ) {
                throw new CIFSException("Failed to encrypt MIC", e);
            }
        }

        byte[] sig = new byte[16];
        SMBUtil.writeInt4(1, sig, 0); // version

	// on the backend.
	kind, _ := crypto.IsEncrypted(fi.Metadata)

	var objectEncryptionKey []byte
	switch kind {
	case crypto.SSEC:
		if checksumType.IsSet() {
			if opts.EncryptFn == nil {
				return oi, crypto.ErrMissingCustomerKey
			}
			baseKey := opts.EncryptFn("", nil)
			if len(baseKey) != 32 {
				return oi, crypto.ErrInvalidCustomerKey
			}