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ReidentifyFreeTextFpe.cs
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ReidentifyFreeTextFpe.cs
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// Copyright 2023 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
// [START dlp_reidentify_text_fpe]
using System;
using Google.Api.Gax.ResourceNames;
using Google.Cloud.Dlp.V2;
using Google.Protobuf;
using static Google.Cloud.Dlp.V2.CryptoReplaceFfxFpeConfig.Types;
public class ReidentifyFreeTextFpe
{
public static ReidentifyContentResponse ReidentifyContent(
string projectId,
string text,
string keyName,
string wrappedKey,
FfxCommonNativeAlphabet alphabet = FfxCommonNativeAlphabet.Numeric,
InfoType surrogateType = null)
{
// Instantiate the client.
var dlp = DlpServiceClient.Create();
// Construct the infoType which will be used as both surrogate type and infoType.
var infotype = surrogateType ?? new InfoType { Name = "PHONE_TOKEN" };
// Specify how to un-encrypt the previously de-identified information.
var cryptoReplaceFfxFpeConfig = new CryptoReplaceFfxFpeConfig
{
CryptoKey = new CryptoKey
{
KmsWrapped = new KmsWrappedCryptoKey
{
CryptoKeyName = keyName,
WrappedKey = ByteString.FromBase64(wrappedKey)
}
},
CommonAlphabet = alphabet,
SurrogateInfoType = infotype
};
// Construct re-identify config using the CryptoReplaceFfxFpeConfig transformation method.
var reidentifyConfig = new DeidentifyConfig
{
InfoTypeTransformations = new InfoTypeTransformations
{
Transformations =
{
new InfoTypeTransformations.Types.InfoTypeTransformation
{
PrimitiveTransformation = new PrimitiveTransformation
{
CryptoReplaceFfxFpeConfig = cryptoReplaceFfxFpeConfig,
},
InfoTypes = { infotype }
}
}
}
};
// Construct the inspect config using custom infoTypes.
var inspectConfig = new InspectConfig
{
CustomInfoTypes =
{
new CustomInfoType
{
InfoType = infotype,
SurrogateType = new CustomInfoType.Types.SurrogateType()
}
}
};
// Construct the request.
var request = new ReidentifyContentRequest
{
ParentAsLocationName = new LocationName(projectId, "global"),
InspectConfig = inspectConfig,
ReidentifyConfig = reidentifyConfig,
Item = new ContentItem { Value = text },
};
// Call the API.
ReidentifyContentResponse response = dlp.ReidentifyContent(request);
// Inspect the response.
Console.WriteLine($"Reidentified content: {response.Item.Value}");
return response;
}
}
// [END dlp_reidentify_text_fpe]