feat(server): support EC and EdDSA keys in OIDC JWKS validation

Signed-off-by: Yuedong Wu <dwcn22@outlook.com>

Author: lunarwhite

architecture/gateway.md

@@ -182,7 +182,7 @@ Supported auth modes:
 | Plaintext | Local development or a trusted reverse proxy boundary. |
 | Unauthenticated local users | Trusted Kubernetes dev or fully trusted proxy deployments only. |
 | Cloudflare JWT | Edge-authenticated deployments where Cloudflare Access supplies identity. |
-| OIDC | Bearer-token auth for users, with browser or device-code PKCE and client credentials login. |
+| OIDC | Bearer-token auth for users, with browser or device-code PKCE and client credentials login. JWKS validation accepts RS256, RS384, RS512, PS256, PS384, PS512, ES256, ES384, and EdDSA (Ed25519) signing keys. |
 
 The CLI persists the scopes requested during OIDC login in gateway metadata and
 reuses them when refreshing an access token. This preserves the intended API

crates/openshell-server/Cargo.toml

@@ -137,10 +137,10 @@ bundled-z3 = ["openshell-prover/bundled-z3"]
 test-support = []
 
 [dev-dependencies]
+base64 = { workspace = true }
 hyper-rustls = { version = "0.27", default-features = false, features = ["native-tokio", "http1", "tls12", "logging", "ring"] }
 rcgen = { version = "0.13", features = ["crypto", "pem"] }
 rsa = { version = "0.9", features = ["pem"] }
-base64 = { workspace = true }
 tokio-tungstenite = { workspace = true }
 futures-util = "0.3"
 wiremock = "0.6"