ErrKeyNotFound = Error{
		Code:    http.StatusNotFound,
		APICode: "kms:KeyNotFound",
		Err:     "key with given key ID does not exist",
	}

	// ErrDecrypt is an error returned by the KMS when the decryption
	// of a ciphertext failed.
	ErrDecrypt = Error{
		Code:    http.StatusBadRequest,
		APICode: "kms:InvalidCiphertextException",
		Err:     "failed to decrypt ciphertext",
	}

		UserDefined:                srcInfo.UserDefined,
		Versioned:                  dstOpts.Versioned,
		VersionID:                  dstOpts.VersionID,
		MTime:                      dstOpts.MTime,
		EncryptFn:                  dstOpts.EncryptFn,
		WantChecksum:               dstOpts.WantChecksum,
		WantServerSideChecksumType: dstOpts.WantServerSideChecksumType,
	}

		Plaintext:  plaintext,
		Ciphertext: ciphertext,
	}, nil
}

// Decrypt decrypts req.Ciphertext. The key name req.Name must match the key
// name of the secretKey.
//
// Decrypt supports decryption of binary-encoded ciphertexts, as produced by KES
// and MinKMS, and legacy JSON formatted ciphertexts.
func (s secretKey) Decrypt(_ context.Context, req *DecryptRequest) ([]byte, error) {
	if req.Name != s.keyID {

			if opts.EncryptFn != nil {
				fi.Checksum = opts.EncryptFn("object-checksum", fi.Checksum)
			}
		}
	} else if fi.Checksum == nil && opts.WantChecksum != nil {
		// Trailing headers checksums should now be filled.
		fi.Checksum = opts.WantChecksum.AppendTo(nil, nil)
		if opts.EncryptFn != nil {
			fi.Checksum = opts.EncryptFn("object-checksum", fi.Checksum)
		}
	}

		Versioned:                  dstOpts.Versioned,
		VersionID:                  dstOpts.VersionID,
		MTime:                      dstOpts.MTime,
		NoLock:                     true,
		EncryptFn:                  dstOpts.EncryptFn,
		WantChecksum:               dstOpts.WantChecksum,
		WantServerSideChecksumType: dstOpts.WantServerSideChecksumType,
	}

				rinfo.ReplicationAction = rAction
				rinfo.ReplicationStatus = replication.Completed
			}
			return rinfo
		}
	} else {
		// SSEC objects will refuse HeadObject without the decryption key.
		// Ignore the error, since we know the object exists and versioning prevents overwriting existing versions.
		if isSSEC && strings.Contains(cerr.Error(), errorCodes[ErrSSEEncryptedObject].Description) {