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reid_table_fpe.go
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/
reid_table_fpe.go
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// Copyright 2023 Google LLC
//
// 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
//
// https://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.
package deid
// [START dlp_reidentify_table_fpe]
import (
"context"
"encoding/base64"
"fmt"
"io"
dlp "cloud.google.com/go/dlp/apiv2"
"cloud.google.com/go/dlp/apiv2/dlppb"
)
// reidTableDataWithFPE re-identifies table data with FPE
func reidTableDataWithFPE(w io.Writer, projectID, kmsKeyName, wrappedAesKey string) error {
// projectId := "my-project-id"
/* kmsKeyName := "projects/YOUR_PROJECT/"
+ "locations/YOUR_KEYRING_REGION/"
+ "keyRings/YOUR_KEYRING_NAME/"
+ "cryptoKeys/YOUR_KEY_NAME"
*/
// wrappedAesKey := "YOUR_ENCRYPTED_AES_256_KEY"
ctx := context.Background()
// Initialize a client once and reuse it to send multiple requests. Clients
// are safe to use across goroutines. When the client is no longer needed,
// call the Close method to cleanup its resources.
client, err := dlp.NewClient(ctx)
if err != nil {
return err
}
// Closing the client safely cleans up background resources.
defer client.Close()
// Specify the table data that needs to be re-identified.
tableToReIdentify := &dlppb.Table{
Headers: []*dlppb.FieldId{
{Name: "Employee ID"},
},
Rows: []*dlppb.Table_Row{
{
Values: []*dlppb.Value{
{
Type: &dlppb.Value_StringValue{
StringValue: "90511",
},
},
},
},
},
}
// Specify the content you want to re-identify.
contentItem := &dlppb.ContentItem{
DataItem: &dlppb.ContentItem_Table{
Table: tableToReIdentify,
},
}
// Specify an encrypted AES-256 key and the name of the Cloud KMS key that encrypted it.
kmsWrappedCryptoKey, err := base64.StdEncoding.DecodeString(wrappedAesKey)
if err != nil {
return err
}
cryptoKey := &dlppb.CryptoKey{
Source: &dlppb.CryptoKey_KmsWrapped{
KmsWrapped: &dlppb.KmsWrappedCryptoKey{
WrappedKey: kmsWrappedCryptoKey,
CryptoKeyName: kmsKeyName,
},
},
}
// Specify how to un-encrypt the previously de-identified information.
cryptoReplaceFfxFpeConfig := &dlppb.CryptoReplaceFfxFpeConfig{
CryptoKey: cryptoKey,
Alphabet: &dlppb.CryptoReplaceFfxFpeConfig_CommonAlphabet{
CommonAlphabet: dlppb.CryptoReplaceFfxFpeConfig_NUMERIC,
},
}
primitiveTransformation := &dlppb.PrimitiveTransformation{
Transformation: &dlppb.PrimitiveTransformation_CryptoReplaceFfxFpeConfig{
CryptoReplaceFfxFpeConfig: cryptoReplaceFfxFpeConfig,
},
}
// Specify field to be decrypted.
fieldId := &dlppb.FieldId{
Name: "Employee ID",
}
// Associate the decryption with the specified field.
fieldTransformation := &dlppb.FieldTransformation{
Transformation: &dlppb.FieldTransformation_PrimitiveTransformation{
PrimitiveTransformation: primitiveTransformation,
},
Fields: []*dlppb.FieldId{
fieldId,
},
}
recordTransformations := &dlppb.RecordTransformations{
FieldTransformations: []*dlppb.FieldTransformation{
fieldTransformation,
},
}
deidentifyConfig := &dlppb.DeidentifyConfig{
Transformation: &dlppb.DeidentifyConfig_RecordTransformations{
RecordTransformations: recordTransformations,
},
}
// Combine configurations into a request for the service.
req := &dlppb.ReidentifyContentRequest{
Parent: fmt.Sprintf("projects/%s/locations/global", projectID),
ReidentifyConfig: deidentifyConfig,
Item: contentItem,
}
// Send the request and receive response from the service.
resp, err := client.ReidentifyContent(ctx, req)
if err != nil {
return err
}
// Print the result.
fmt.Fprintf(w, "Table after re-identification : %v", resp.GetItem().GetTable())
return nil
}
// [END dlp_reidentify_table_fpe]