import (
"context"
"encoding/base64"
"fmt"
"io"
dlp "cloud.google.com/go/dlp/apiv2"
"cloud.google.com/go/dlp/apiv2/dlppb"
)
// deidentifyFreeTextWithFPEUsingSurrogate de-identifies free text with FPE by using a surrogate
func deidentifyFreeTextWithFPEUsingSurrogate(w io.Writer, projectID, inputStr, infoType, surrogateType, unwrappedKey string) error {
// projectId := "your-project-id"
// inputStr := "My phone number is 9824376677"
// infoType := "PHONE_NUMBER"
// surrogateType := "PHONE_TOKEN"
// unwrappedKey := "The base64-encoded AES-256 key to use"
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()
// decoding the unwrapped key
keyDecode, err := base64.StdEncoding.DecodeString(unwrappedKey)
if err != nil {
return err
}
inspectConfig := &dlppb.InspectConfig{
InfoTypes: []*dlppb.InfoType{
{Name: infoType},
},
MinLikelihood: dlppb.Likelihood_UNLIKELY,
}
// specify the content to be de-identified
contentItem := &dlppb.ContentItem{
DataItem: &dlppb.ContentItem_Value{
Value: inputStr,
},
}
// Specify how the content should be encrypted.
cryptoReplaceConfig := &dlppb.CryptoReplaceFfxFpeConfig{
CryptoKey: &dlppb.CryptoKey{
Source: &dlppb.CryptoKey_Unwrapped{
Unwrapped: &dlppb.UnwrappedCryptoKey{
Key: keyDecode,
},
},
},
Alphabet: &dlppb.CryptoReplaceFfxFpeConfig_CommonAlphabet{
CommonAlphabet: dlppb.CryptoReplaceFfxFpeConfig_NUMERIC,
},
SurrogateInfoType: &dlppb.InfoType{
Name: surrogateType,
},
}
// Apply crypto replace config to primitive transformation.
primitiveTransformation := &dlppb.PrimitiveTransformation{
Transformation: &dlppb.PrimitiveTransformation_CryptoReplaceFfxFpeConfig{
CryptoReplaceFfxFpeConfig: cryptoReplaceConfig,
},
}
infoTypeTransformation := &dlppb.DeidentifyConfig_InfoTypeTransformations{
InfoTypeTransformations: &dlppb.InfoTypeTransformations{
Transformations: []*dlppb.InfoTypeTransformations_InfoTypeTransformation{
{
InfoTypes: []*dlppb.InfoType{
{Name: infoType},
},
PrimitiveTransformation: primitiveTransformation,
},
},
},
}
// Construct the de-identification request to be sent by the client.
req := &dlppb.DeidentifyContentRequest{
Parent: fmt.Sprintf("projects/%s/locations/global", projectID),
DeidentifyConfig: &dlppb.DeidentifyConfig{
Transformation: infoTypeTransformation,
},
InspectConfig: inspectConfig,
Item: contentItem,
}
// Send the request.
resp, err := client.DeidentifyContent(ctx, req)
if err != nil {
return err
}
// Print the results.
fmt.Fprintf(w, "output: %v", resp.GetItem().GetValue())
return nil
}
