GCP DLP（数据丢失预防）获取“解密失败：密文无效”。400错误

Question

我先创建了一个密钥环，然后创建了一个密钥。然后使用导入作业创建了一个打包的密钥。然后使用下面的代码对普通文本进行解密。但我得到了以下错误：

.InvalidArgument: 400 Received the following error message from Cloud KMS when unwrapping KmsWrappedCryptoKey "projects/XXXXXXXXXXXX/location s/global/keyRings/demo-keyring/cryptoKeys/demo_v1": Decryption failed: the ciphertext is invalid.

代码如下：

# Import the client library
import google.cloud.dlp

# Instantiate a client
dlp = google.cloud.dlp_v2.DlpServiceClient()
project = 'XXXXXX'
stringVal = 'My name is Sonal Singh and my email id is : sonalsingh@gmail.com'
alphabet='ALPHA_NUMERIC'
surrogate_type='EMAIL_ADDRESS'
wrapped_key=('XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'
'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'
'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX+'
'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'
'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'
'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX+gr'
'l+XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX+'
'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX+/+'
'//xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=')

#key_name = ('projects/XXXXXXXXXXXXX/locations/global/keyRings/demo-keyring/cryptoKeys/demo_key')


parent = dlp.project_path(project)
# The wrapped key is base64-encoded, but the library expects a binary
# string, so decode it here.
import base64

wrapped_key = base64.b64decode(wrapped_key)

# Construct FPE configuration dictionary
crypto_replace_ffx_fpe_config = {
        "crypto_key": {
            "kms_wrapped": {
                "wrapped_key": wrapped_key,
                "crypto_key_name": key_name,
            }
        },
        "common_alphabet": alphabet,
}

# Add surrogate type
if surrogate_type:
        crypto_replace_ffx_fpe_config["surrogate_info_type"] = {
            "name": surrogate_type
        }

# Construct inspect configuration dictionary
inspect_config = {
        "info_types": [{"name": info_type} for info_type in ["FIRST_NAME", "LAST_NAME", "EMAIL_ADDRESS"]]
        }

# Construct deidentify configuration dictionary
deidentify_config = {
        "info_type_transformations": {
            "transformations": [
                {
                    "primitive_transformation": {
                        "crypto_replace_ffx_fpe_config": crypto_replace_ffx_fpe_config
                    }
                }
            ]
        }
    }

# Convert string to item
item = {"value": stringVal}

# Call the API
response = dlp.deidentify_content(
        parent,
        inspect_config=inspect_config,
        deidentify_config=deidentify_config,
        item=item
    )

# Print results
print(response.item.value)

我可以看到另一个具有相同问题的堆栈溢出帖子： GCP DLP(Data Loss prevention) getting "Decryption failed: the ciphertext is invalid." 但不确定这一步意味着什么： 在您对Google Cloud DLP API的请求中使用此生成的值

如何在上述代码中使用此值

Answer 1

是的，我认为other StackOverflow question you found可以在这里帮助我们

我对python不是很精通，但我看到了一些我想指出的东西。我认为您正在执行步骤1&；3从另一个StackOverflow post1正确，但是您缺少使用Cloud KMS进行加密的步骤2（对您的案例进行解密）

您是否有机会浏览：

https://cloud.google.com/kms/docs/reference/libraries#client-libraries-usage-pythonhttps://cloud.google.com/kms/docs/encrypt-decrypt#kms-howto-encrypt-python

另外，请知道您已经在代码上发布了您的电子邮件，您可能希望对其进行编辑

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