/
reid_free_text_with_fpe_using_surrogate.go
128 lines (113 loc) · 3.75 KB
/
reid_free_text_with_fpe_using_surrogate.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_free_text_with_fpe_using_surrogate]
import (
"context"
"encoding/base64"
"fmt"
"io"
dlp "cloud.google.com/go/dlp/apiv2"
"cloud.google.com/go/dlp/apiv2/dlppb"
)
// reidentifyFreeTextWithFPEUsingSurrogate re-identifies free text with FPE using surrogate
func reidentifyFreeTextWithFPEUsingSurrogate(w io.Writer, projectID, inputStr, surrogateType, unWrappedKey string) error {
// projectId := "your-project-id"
// inputStr := "My phone number is PHONE_TOKEN(10):4068372189"
// surrogateType := "PHONE_TOKEN"
// unWrappedKey := "hXribiHR6kvVKmj5ptTZLRTj8+u0eBQzwcrEPwyGhe8="
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()
// The wrapped key is base64-encoded, but the library expects a binary
// string, so decode it here.
keyBytes, err := base64.StdEncoding.DecodeString(unWrappedKey)
if err != nil {
return err
}
// using the unwrapped key and surrogate info type construct cryptoReplaceConfig
cryptoReplaceConfig := &dlppb.CryptoReplaceFfxFpeConfig{
CryptoKey: &dlppb.CryptoKey{
Source: &dlppb.CryptoKey_Unwrapped{
Unwrapped: &dlppb.UnwrappedCryptoKey{
Key: keyBytes,
},
},
},
Alphabet: &dlppb.CryptoReplaceFfxFpeConfig_CommonAlphabet{
CommonAlphabet: dlppb.CryptoReplaceFfxFpeConfig_NUMERIC,
},
SurrogateInfoType: &dlppb.InfoType{
Name: surrogateType,
},
}
// construct infoType transformations
infoTypeTransformations := &dlppb.InfoTypeTransformations{
Transformations: []*dlppb.InfoTypeTransformations_InfoTypeTransformation{
{
PrimitiveTransformation: &dlppb.PrimitiveTransformation{
Transformation: &dlppb.PrimitiveTransformation_CryptoReplaceFfxFpeConfig{
CryptoReplaceFfxFpeConfig: cryptoReplaceConfig,
},
},
},
},
}
// construct re-identify config
reIdentifyConfig := &dlppb.DeidentifyConfig{
Transformation: &dlppb.DeidentifyConfig_InfoTypeTransformations{
InfoTypeTransformations: infoTypeTransformations,
},
}
// construct inspect config to pass in req
inspectConfig := &dlppb.InspectConfig{
CustomInfoTypes: []*dlppb.CustomInfoType{
{
InfoType: &dlppb.InfoType{
Name: surrogateType,
},
Type: &dlppb.CustomInfoType_SurrogateType_{
SurrogateType: &dlppb.CustomInfoType_SurrogateType{},
},
},
},
}
// Construct the de-identification request to be sent by the client.
req := &dlppb.ReidentifyContentRequest{
Parent: fmt.Sprintf("projects/%s/locations/global", projectID),
ReidentifyConfig: reIdentifyConfig,
InspectConfig: inspectConfig,
Item: &dlppb.ContentItem{
DataItem: &dlppb.ContentItem_Value{
Value: inputStr,
},
},
}
// Send the request.
r, err := client.ReidentifyContent(ctx, req)
if err != nil {
return err
}
// Print the result.
fmt.Fprintf(w, "output: %v", r.GetItem().GetValue())
return nil
}
// [END dlp_reidentify_free_text_with_fpe_using_surrogate]