return keyID, kmsKey, sealedKey, Errorf("The internal sealed key for SSE-S3 is invalid")
	}
	if idPresent && kmsKeyPresent { // We are using a KMS -> parse the sealed KMS data key.
		kmsKey, err = base64.StdEncoding.DecodeString(b64KMSSealedKey)
		if err != nil {
			return keyID, kmsKey, sealedKey, Errorf("The internal sealed KMS data key for SSE-S3 is invalid")
		}
	}

	sealedKey.Algorithm = algorithm

	// MetaSealedKeySSEC is the sealed object encryption key in case of SSE-C.
	MetaSealedKeySSEC = "X-Minio-Internal-Server-Side-Encryption-Sealed-Key"
	// MetaSealedKeyS3 is the sealed object encryption key in case of SSE-S3
	MetaSealedKeyS3 = "X-Minio-Internal-Server-Side-Encryption-S3-Sealed-Key"
	// MetaSealedKeyKMS is the sealed object encryption key in case of SSE-KMS

	if md5Sum := md5.Sum(clientKey); err != nil || !bytes.Equal(md5Sum[:], keyMD5) {
		return key, ErrCustomerKeyMD5Mismatch
	}
	copy(key[:], clientKey)
	return key, nil
}

// UnsealObjectKey extracts and decrypts the sealed object key
// from the metadata using the SSE-C client key of the HTTP headers
// and returns the decrypted object key.

		return keyID, kmsKey, sealedKey, ctx, Errorf("The internal sealed key for SSE-KMS is invalid")
	}
	if idPresent && kmsKeyPresent { // We are using a KMS -> parse the sealed KMS data key.
		kmsKey, err = base64.StdEncoding.DecodeString(b64KMSSealedKey)
		if err != nil {
			return keyID, kmsKey, sealedKey, ctx, Errorf("The internal sealed KMS data key for SSE-KMS is invalid")
		}
	}
	b64Ctx, ok := metadata[MetaContext]

": "jIJPsrkkVYYMvc7edBrNl+7zcM7+ZwXqMb/YAjBO/ck=", "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Key-Id": "my-minio-key", "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Sealed-Key": "IAAfAP2p7ZLv3UpLwBnsKkF2mtWba0qoY42tymK0szRgGvAxBNcXyHXYooe9dQpeeEJWgKUa/8R61oCy1mFwIg==", "X-Minio-Internal-Server-Side-Encryption-S3-Sealed-Key": "IAAfAPFYRDkHVirJBJxBixNj3PLWt78dFuUTyTLIdLG820J7XqLPBO4gpEEEWw/DoTsJIb+apnaem+rKtQ1h3Q==", "X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm": "DAREv2-HMAC-SHA256",...

			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
		},
		Bucket: "bucket",
		Object: "object",
		Metadata: map[string]string{
			"X-Minio-Internal-Server-Side-Encryption-Sealed-Key":     "IAAfAMBdYor5tf/UlVaQvwYlw5yKbPBeQqfygqsfHqhu1wHD9KDAP4bw38AhL12prFTS23JbbR9Re5Qv26ZnlQ==",
			"X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm": "DAREv2-HMAC-SHA256",

// Requested returns whether any type of encryption is requested.
func Requested(h http.Header) bool {
	return S3.IsRequested(h) || S3KMS.IsRequested(h) || SSEC.IsRequested(h)
}

// UnsealObjectKey extracts and decrypts the sealed object key
// from the metadata using the SSE-Copy client key of the HTTP headers
// and returns the decrypted object key.

		logger.CriticalIf(context.Background(), errors.New("Unable to generate sealed key"))
	}
	sealedKey := SealedKey{
		IV:        iv,
		Algorithm: SealAlgorithm,
	}
	copy(sealedKey.Key[:], encryptedKey.Bytes())
	return sealedKey
}

// Unseal decrypts a sealed key using the 256 bit external key. Since the sealed key
// may be cryptographically bound to the object's path the same bucket/object as during sealing

        "Size": 314,
        "MTime": 1591820730,
        "MetaSys": {
          "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Key-Id": "bXktbWluaW8ta2V5",

// The ObjectKey itself is never stored in plaintext. Instead it is only stored
// in a sealed from. The sealed 'ObjectKey' is created by encrypting the 'ObjectKey'
// with an unique key-encryption-key. Given the correct key-encryption-key the
// sealed 'ObjectKey' can be unsealed and the object can be decrypted.
//
// ## SSE-C
//