##### Figure 1 - Secure Channel construction

```
plaintext   := chunk_0          ||       chunk_1          ||       chunk_2          ||       ...

		key, err := GlobalKMS.GenerateKey(ctx, "", kms.Context{bucket: path.Join(bucket, object)})
		if err != nil {
			return crypto.ObjectKey{}, err
		}

		objectKey := crypto.GenerateKey(key.Plaintext, rand.Reader)
		sealedKey = objectKey.Seal(key.Plaintext, crypto.GenerateIV(rand.Reader), crypto.S3.String(), bucket, object)
		crypto.S3.CreateMetadata(metadata, key.KeyID, key.Ciphertext, sealedKey)
		return objectKey, nil
	case crypto.S3KMS:

			return
		}
		writeSuccessResponseJSON(w, resp)
		return
	}

	// 3. Compare generated key with decrypted key
	if subtle.ConstantTimeCompare(key.Plaintext, decryptedKey) != 1 {
		response.DecryptionErr = "The generated and the decrypted data key do not match"
		resp, err := json.Marshal(response)
		if err != nil {

	c.lock.RLock()
	defer c.lock.RUnlock()

	plaintexts := make([][]byte, 0, len(ciphertexts))
	for i := range ciphertexts {
		ctxBytes, err := contexts[i].MarshalText()
		if err != nil {
			return nil, err
		}
		plaintext, err := c.client.Decrypt(ctx, keyID, ciphertexts[i], ctxBytes)
		if err != nil {
			return nil, err
		}
		plaintexts = append(plaintexts, plaintext)
	}
	return plaintexts, nil
}

	// are slightly larger due to encryption overhead.
	// Further, we have to adjust the ETags of parts when using SSE-S3.
	// Due to AWS S3, SSE-S3 encrypted parts return the plaintext ETag
	// being the content MD5 of that particular part. This is not the
	// case for SSE-C and SSE-KMS objects.
	if kind, ok := crypto.IsEncrypted(listPartsInfo.UserDefined); ok {
		var objectEncryptionKey []byte

var decryptTests = []struct {
	Key       []byte
	ETag      ETag
	Plaintext ETag
}{
	{ // 0
		Key:       make([]byte, 32),
		ETag:      must("3b83ef96387f14655fc854ddc3c6bd57"),
		Plaintext: must("3b83ef96387f14655fc854ddc3c6bd57"),
	},
	{ // 1
		Key:       make([]byte, 32),
		ETag:      must("7b976cc68452e003eec7cb0eb631a19a-1"),
		Plaintext: must("7b976cc68452e003eec7cb0eb631a19a-1"),
	},
	{ // 2

	if !etag.IsEncrypted() {
		return etag, nil
	}
	mac := hmac.New(sha256.New, key)
	mac.Write([]byte(HMACContext))
	decryptionKey := mac.Sum(nil)

	plaintext := make([]byte, 0, 16)
	etag, err := sio.DecryptBuffer(plaintext, etag, sio.Config{
		Key:          decryptionKey,
		CipherSuites: fips.DARECiphers(),
	})
	if err != nil {
		return nil, err
	}
	return etag, nil
}

	key, err := GlobalKMS.GenerateKey(ctx, "", kmsContext)
	if err != nil {
		return
	}

	outbuf := bytes.NewBuffer(nil)
	objectKey := crypto.GenerateKey(key.Plaintext, rand.Reader)
	sealedKey := objectKey.Seal(key.Plaintext, crypto.GenerateIV(rand.Reader), crypto.S3.String(), bucket, "")
	crypto.S3.CreateMetadata(metadata, key.KeyID, key.Ciphertext, sealedKey)