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102 lines
3.4 KiB
102 lines
3.4 KiB
// Copyright (C) MongoDB, Inc. 2017-present.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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package options
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// DataKeyOptions represents all possible options used to create a new data key.
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type DataKeyOptions struct {
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MasterKey interface{}
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KeyAltNames []string
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// KeyMaterial is used to encrypt data. If omitted, keyMaterial is generated form a cryptographically secure random
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// source. "Key Material" is used interchangeably with "dataKey" and "Data Encryption Key" (DEK).
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KeyMaterial []byte
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}
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// DataKey creates a new DataKeyOptions instance.
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func DataKey() *DataKeyOptions {
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return &DataKeyOptions{}
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}
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// SetMasterKey specifies a KMS-specific key used to encrypt the new data key.
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//
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// If being used with a local KMS provider, this option is not applicable and should not be specified.
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//
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// For the AWS, Azure, and GCP KMS providers, this option is required and must be a document. For each, the value of the
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// "endpoint" or "keyVaultEndpoint" must be a host name with an optional port number (e.g. "foo.com" or "foo.com:443").
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//
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// When using AWS, the document must have the format:
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//
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// {
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// region: <string>,
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// key: <string>, // The Amazon Resource Name (ARN) to the AWS customer master key (CMK).
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// endpoint: Optional<string> // An alternate host identifier to send KMS requests to.
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// }
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//
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// If unset, the "endpoint" defaults to "kms.<region>.amazonaws.com".
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//
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// When using Azure, the document must have the format:
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//
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// {
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// keyVaultEndpoint: <string>, // A host identifier to send KMS requests to.
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// keyName: <string>,
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// keyVersion: Optional<string> // A specific version of the named key.
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// }
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//
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// If unset, "keyVersion" defaults to the key's primary version.
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//
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// When using GCP, the document must have the format:
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//
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// {
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// projectId: <string>,
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// location: <string>,
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// keyRing: <string>,
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// keyName: <string>,
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// keyVersion: Optional<string>, // A specific version of the named key.
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// endpoint: Optional<string> // An alternate host identifier to send KMS requests to.
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// }
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//
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// If unset, "keyVersion" defaults to the key's primary version and "endpoint" defaults to "cloudkms.googleapis.com".
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func (dk *DataKeyOptions) SetMasterKey(masterKey interface{}) *DataKeyOptions {
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dk.MasterKey = masterKey
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return dk
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}
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// SetKeyAltNames specifies an optional list of string alternate names used to reference a key. If a key is created'
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// with alternate names, encryption may refer to the key by a unique alternate name instead of by _id.
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func (dk *DataKeyOptions) SetKeyAltNames(keyAltNames []string) *DataKeyOptions {
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dk.KeyAltNames = keyAltNames
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return dk
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}
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// SetKeyMaterial will set a custom keyMaterial to DataKeyOptions which can be used to encrypt data.
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func (dk *DataKeyOptions) SetKeyMaterial(keyMaterial []byte) *DataKeyOptions {
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dk.KeyMaterial = keyMaterial
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return dk
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}
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// MergeDataKeyOptions combines the argued DataKeyOptions in a last-one wins fashion.
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func MergeDataKeyOptions(opts ...*DataKeyOptions) *DataKeyOptions {
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dko := DataKey()
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for _, opt := range opts {
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if opt == nil {
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continue
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}
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if opt.MasterKey != nil {
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dko.MasterKey = opt.MasterKey
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}
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if opt.KeyAltNames != nil {
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dko.KeyAltNames = opt.KeyAltNames
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}
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if opt.KeyMaterial != nil {
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dko.KeyMaterial = opt.KeyMaterial
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}
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}
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return dko
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}
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