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22 de fev. de 2024 · Tink is a multi-language, cross-platform, open source library that provides secure and easy-to-use cryptographic APIs, and was created and is being maintained by cryptographers and security...
- What is Tink
Tink is an open-source cryptography library written by...
- 2. Set up Tink
You can build Tink from source or use language-specific...
- Overview
Tink Java uses an underlying security provider, like...
- How to contribute to Tink
Head over to the Google Developers Contributor License...
- Primitives supported by language
Overview; Encrypt data; Encrypt large files or data streams;...
- Key types supported by language
Supported primitives by language; Suppported primitive key...
- What is Tink
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- Introduction
- Dependencies
- Initialization
- Tink Primitives
- Hybrid Encryption
- Message Authentication Code
- Digital Signature
- Conclusion
Nowadays, many developers use cryptographic techniques to protect user data. In cryptography, small implementation errors can have serious consequences, and understanding how to implement cryptography correctly is a complex and time-consuming task. In this tutorial, we’re going to describe Tink– a multi-language, cross-platform cryptographic librar...
We can use Maven or Gradle to import Tink. For our tutorial, we’ll just add Tink’s Maven dependency: Though we could have used Gradle instead:
Before using any of Tink APIs we need to initialize them. If we need to use all implementations of all primitives in Tink, we can use the TinkConfig.register()method: While, for example, if we only need AEAD primitive, we can use AeadConfig.register()method: A customizable initialization is provided for each implementation, too.
The main objects the library uses are called primitives which, depending on the type, contains different cryptographic functionality. A primitive can have multiple implementations: We can obtain a primitive by calling the methodgetPrimitive() of the corresponding factory class passing it a KeysetHandle:
In addition to symmetric encryption, Tink implements a couple of primitives for hybrid encryption. With Hybrid Encryption we can get the efficiency of symmetric keys and the convenience of asymmetric keys. Simply put, we’ll use a symmetric key to encrypt the plaintext and a public key to encrypt the symmetric key only. Notice that it provides secre...
Tink also supports Message Authentication Codes or MACs. A MAC is a block of a few bytes that we can use to authenticate a message. Let’s see how we can create a MAC and then verify its authenticity: In the event that the data isn’t authentic, the method verifyMac() throws a GeneralSecurityException.
As well as encryption APIs, Tink supports digital signatures. To implement digital signature, the library uses the PublicKeySign primitive for the signing of data, and PublickeyVerifyfor verification: Similar to the previous encryption method, when the signature is invalid, we’ll get a GeneralSecurityException.
In this article, we introduced the Google Tink library using its Java implementation. We’ve seen how to use to encrypt and decrypt data and how to protect its integrity and authenticity. Moreover, we’ve seen how to sign data using digital signature APIs. As always, the sample code is available over on GitHub.
- AEAD: AES-SIV
- HMAC-SHA2
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8 de set. de 2018 · Como uma forma de ajudar os desenvolvedores a criarem códigos seguros e confiáveis, a Google elaborou a Tink, uma espécie de biblioteca criptográfica multilinguagem.
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