Tink: Streaming encryption using Vault KMS

问题内容

我正在尝试使用 Tink 和 HashiCorp Vault 进行加密和解密。当我尝试使用相同的 AEAD 对象在同一会话中加密和解密时，它工作正常。但是，如果我将先前加密运行的结果存储在文件中，然后尝试仅在此文件上运行解密函数，则会遇到错误，提示“在流中找不到密文的匹配密钥。” p>

我附上了代码供参考：

keyUri := "hcvault://my-vault-url.com/transit/keys/my-key2"
vaultClient, err := hcvault.NewClient(keyUri, tlsConfig(), vaultToken())
if err != nil {
    log.Fatal(err)
}

kekAEAD, err := vaultClient.GetAEAD(keyUri)

if err != nil {
    log.Fatal(err)
}

// Generate a new keyset handle for the primitive we want to use.
newHandle, err := keyset.NewHandle(streamingaead.AES256GCMHKDF1MBKeyTemplate())
if err != nil {
    log.Fatal(err)
}

// Choose some associated data. This is the context in which the keyset will be used.
keysetAssociatedData := []byte("keyset encryption example")

// Encrypt the keyset with the KEK AEAD and the associated data.
buf := new(bytes.Buffer)
writer := keyset.NewBinaryWriter(buf)
err = newHandle.WriteWithAssociatedData(writer, kekAEAD, keysetAssociatedData)
if err != nil {
    log.Fatal(err)
}
encryptedKeyset := buf.Bytes()

reader := keyset.NewBinaryReader(bytes.NewReader(encryptedKeyset))
handle, err := keyset.ReadWithAssociatedData(reader, kekAEAD, keysetAssociatedData)
if err != nil {
    log.Fatal(err)
}

streamingAEAD, err := streamingaead.New(handle)
if err != nil {
    log.Fatal(err)
}
outputFilePath := "C:\\temp\\encryptionOutput6.txt"
inputFilePath := "C:\\temp\\input.mkv"

EncryptFile(streamingAEAD, inputFilePath, outputFilePath, keysetAssociatedData)
DecryptFile(streamingAEAD, outputFilePath, "c:\\temp\\f_result.mkv", keysetAssociatedData)

正确答案

经过调查并获得 Tink 开发人员的帮助后，我发现 Tink 目前仅支持 Aead KEK URI。因此，如果您打算使用流机制，则需要将密钥集存储在某处。有关全面的讨论，请参考以下链接：https://github。 com/tink-crypto/tink-go/issues/8

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