58 lines
1.6 KiB
Rust
58 lines
1.6 KiB
Rust
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use fastcrypto::traits::VerifyingKey;
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pub use fastcrypto::{
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ed25519::{
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Ed25519KeyPair, Ed25519PublicKey, Ed25519Signature, ED25519_PUBLIC_KEY_LENGTH,
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ED25519_SIGNATURE_LENGTH,
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},
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traits::{KeyPair, Signer},
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// Verifier,
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};
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use sha2::{Digest, Sha256};
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/// Represents the ID of a unique node. An Ed25519 public key
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pub type AuthorId = [u8; ED25519_PUBLIC_KEY_LENGTH];
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/// A signed message
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pub type SignedDigest = [u8; ED25519_SIGNATURE_LENGTH];
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/// Create a fake public key from a u8
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pub fn make_author(n: u8) -> AuthorId {
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let mut id = [0u8; ED25519_PUBLIC_KEY_LENGTH];
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id[0] = n;
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id
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}
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/// Get the least significant 32 bits of a public key
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pub fn lsb_32(pubkey: AuthorId) -> u32 {
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((pubkey[0] as u32) << 24)
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+ ((pubkey[1] as u32) << 16)
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+ ((pubkey[2] as u32) << 8)
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+ (pubkey[3] as u32)
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}
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/// SHA256 hash of a string
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pub fn sha256(input: String) -> [u8; 32] {
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let mut hasher = Sha256::new();
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hasher.update(input.as_bytes());
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let result = hasher.finalize();
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let mut bytes = [0u8; 32];
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bytes.copy_from_slice(&result[..]);
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bytes
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}
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/// Generate a random Ed25519 keypair from OS rng
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pub fn make_keypair() -> Ed25519KeyPair {
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let mut csprng = rand::thread_rng();
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Ed25519KeyPair::generate(&mut csprng)
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}
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/// Sign a byte array
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pub fn sign(keypair: &Ed25519KeyPair, message: &[u8]) -> Ed25519Signature {
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keypair.sign(message)
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}
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/// Verify a byte array was signed by the given pubkey
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pub fn verify(pubkey: Ed25519PublicKey, message: &[u8], signature: Ed25519Signature) -> bool {
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pubkey.verify(message, &signature).is_ok()
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}
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