Struct LabelSigner 

pub struct LabelSigner { /* private fields */ }

A signer that can produce signatures for labels.

In v0.2.0, this uses a placeholder HMAC-SHA256 implementation. A future version will support ed25519/secp256k1 per the AT Protocol spec.

Implementations

impl LabelSigner

pub fn new(key: Vec<u8>) -> Self

Create a signer from raw key bytes.

pub fn from_base64(encoded: &str) -> Result<Self>

Create a signer from a base64-encoded key string.

Note: This is a placeholder that treats the encoded string as raw bytes. A production implementation would perform proper base64 decoding.

pub fn sign(&self, label: &Label) -> Result<String>

Sign a label, returning the base64-encoded signature.

The signing process:

1. Serialize the label to canonical CBOR (excluding the sig field)
2. Sign the CBOR bytes with the private key
3. Return base64-encoded signature

Note: This is a placeholder implementation using a simple hash. Production use requires ed25519 or secp256k1 signing over CBOR.