rskit-auth — Authentication Helpers

JWT signing/verification, OIDC validation, password hashing, API-key helpers, and request-context auth extractors.

Features

• JwtCodec / JwtHeader — rskit-owned JWT encode/decode/header primitives without exposing the underlying JWT library
• JwtService — sign and verify tokens with explicit HS256 (internal-only), RS256, ES256, or EdDSA
• OidcClient — discovery, PKCE, JWKS-backed ID-token validation, and userinfo lookups
• PasswordHasher — Argon2id hashing and verification
• ResetTokenGenerator — short-lived random opaque tokens
• apikey — prefix lookup + peppered HMAC-SHA-256 digest storage with constant-time compare
• TokenValidator / TokenGenerator traits for pluggable backends
• BearerAuthLayer and apikey::ApiKeyLayer — Tower middleware with fail-closed defaults
• AuthOutcome<C> / AuthClaims<C> — typed request extensions for authenticated and explicitly missing credentials

Usage

[dependencies]
rskit-auth = "0.1.0-alpha.1"

use rskit_auth::{JwtCodec, JwtConfig, JwtService, PasswordHasher, TokenGenerator};

# #[derive(serde::Serialize)]
# struct Claims {
#   sub: String,
#   iss: String,
#   aud: Vec<String>,
#   exp: u64,
#   nbf: u64,
#   iat: u64,
# }
let hasher = PasswordHasher::default();
let hash = hasher.hash("s3cret!").unwrap();
assert!(hasher.verify("s3cret!", &hash).unwrap());

let jwt = JwtService::<Claims>::new(JwtConfig::hs256_internal(
    "internal-secret-key-material-0001",
    "https://issuer.example",
    vec!["service-a".into()],
))
.unwrap();
let codec = JwtCodec::new(JwtConfig::hs256_internal(
    "internal-secret-key-material-0001",
    "https://issuer.example",
    vec!["service-a".into()],
))
.unwrap();
# let _ = (jwt, codec);

JWT / OIDC policy

• Public-key algorithms are preferred: RS256, ES256, EdDSA
• HS256 remains available only through the explicit JwtConfig::hs256_internal(...) constructor
• Verifiers require sub, iss, aud, exp, nbf, and iat; issuer and audience configuration must not be blank
• OIDC enforces authorization-code flow, exact redirect URIs, state, nonce, and PKCE for public clients
• Request middleware extracts credentials from headers only, rejects missing credentials by default, and requires explicit accept_missing() for optional authentication
• BearerAuthLayer returns a neutral WWW-Authenticate: Bearer challenge on rejected requests; downstream applications can add app-specific realm/scope policy at their HTTP boundary if needed
• Credential-bearing Debug output masks bearer/API keys, key digests, PKCE verifiers, authorization codes, and callback secrets

See Also

Main repository README