Crypto module from nodejs is essential to make cryptocurrency wallet. I wanted to use this library which enables you to use node crypto module in RN.
https://github.com/mvayngrib/react-native-crypto
However, the library uses native component for random bytes generation so that I can't use it without detaching the project. It would be helpful to have api for random bytes generation as well as other reimplementations of node crypto module.
Ready to go! https://docs.expo.io/versions/v33.0.0/sdk/crypto/
@Evan Bacon: thank you so much for this! However, I'd have liked to have some others methods like RSA/AES keygen, Crypt, Decrypt, Sign and Verify, in a module called "Crypto" 😅 Or maybe I didn't understood the purpose of this new module 😇 great job anyway!
@Evan Bacon: Thank you for the new feature!!! We really appreciate it! I think like @Peter Cauty. It's posible to add RSA/AES keygen, Crypt, Decrypt, Sign and Verify methods to the expo-crypto module???
@Peter Cauty: what about https://tweetnacl.js.org? This is becoming a de facto standard, so if expo is going to align with something, then TweetNaCl is a good option - especially that it works well with expo already. Having randomBytes from expo-random and using nacl.setPRNG for generating signing key pair we have the whole spectrum of cryptographic primitives covered. For encryption keys and symmetric keys do not even need to use nacl.setPRNG. The only thing that makes using randomBytes from expo-random with nacl.js a bit less convenient is that randomBytes from expo is async. I did not yet have time to check if there is a way to make it sync.
James Ide and I have landed two new unimodules to cover basic Crypto functionality.
1. expo-random (node.js random-bytes) https://github.com/expo/expo/tree/master/packages/expo-random
2. expo-crypto (for creating digests) https://github.com/expo/expo/tree/master/packages/expo-crypto
You can use either of these modules outside of Expo if you want. AFAIK Expo v33 will included both libraries (at which time we will mark this request as complete).
In addition to native support; both modules also have support for react-native-web!! 💙🔥⭐️😁
Will keep you updated on when these are fully complete 😁🥓
@Evan Bacon: 🎉👏
@Evan Bacon: Amazing to hear, thanks so much for your efforts :)
@Evan Bacon: hey there! thanks for this :) Can we start using expo-crypto now that SDK 33 is out?
@Deb Lellouche: 👍 - 33 isn't fully released yet though.
Without a cryptographic random number generator, it is not possible to generate secure random bytes with a suitable level of entropy for use with oauth PKCE signing. As a result, it seems questionable that any Expo application utilizing oauth can claim to be properly secure.
@Ben Burton: I have the exact need.
I really need some support for crypto api in my app. I am considering to temporarily use use a 'hidden' WebView in my app to do some cryptographic tasks. Any feedback on this?
Some way of generating random bytes would be amazing to have in Expo - I currently need to generate a keypair to sign requests. My workaround for my prototype is to fetch some random bytes from random.org to use as a seed for the key generation - this is obviously also a terrible idea, but seems less bad than using Math.random()...
With multiple react-native bip44, bip39 libraries available and all of them using crypto adding this should be a priority. Most of us do not want to detach our entire project because of some entropy input.
Good idea. It's not only necessary for Cryptocurrency. Some Copyright protected files should also be sent by using crypto tools.
I'm currently 100% blocked by this, but... well... we can wait 🤷🏼♂️
Thank you guys!
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Why was it moved from "In progress" to "planned"?
Hey guys, checkout this package I made for using TweetNaCl in Expo https://www.npmjs.com/package/tweet-nacl-react-native-expo
Let me know what you think!