fastcrypto

Common cryptographic library used in software at Mysten Labs.

This crate contains:

• Useful traits that should be implemented by concrete types that represent digital cryptographic material (keys). For signatures, we rely on signature::Signature, which may be more widely implemented.
• Concrete implementations of the following signature schemes that implement the recommended traits required for cryptographic agility. The following schemes are implemented (wrappers over existing popular crates):
  • ed25519 (EdDSA), backed by the ed25519-consensus crate.
  • Secp256k1, backed by the secp256k1 crate.
  • BLS12-381, backed by the blst crate.
• An asynchronous [SignatureService] (which lives in lib.rs) that is instantiated by a Signer object.

Traits

• [ToFromBytes]: this trait aims to minimize the number of steps involved in obtaining a serializable key.
• [EncodeDecodeBase64]: an extension trait of ToFromBytes for immediate conversion to/from base64 strings.
• [VerifyingKey]: which denotes associated types for private key and signature material, while it includes a default naive implementation of batch verification (which can be overridden).
• [SigningKey]: associated types for public key and signature material.
• [Authenticator]: associated types for private key and public key material.
• [KeyPair]: which includes the common get priv/pub key functions and a key-pair generation function.

Tests and Benchmarks

There exist tests for all the three schemes, which can be run by:

$ cargo test

One can compare all currently implemented schemes for sign, verify, verify_batch and key-generation by running:

$ cargo bench