plecto-host 0.3.7

Plecto's wasmtime embedding host: loads, sandboxes, and runs plecto:filter WASM components (the extension plane).
Documentation 
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//! Test / dev signing support — **NOT production provenance**. Generates a fresh ephemeral
//! ECDSA P-256 key (cosign's default scheme), signs blobs with it, and exposes the matching
//! public-key PEM so a test can build a `TrustPolicy` and drive the real verify path
//! end-to-end without the `cosign` CLI. The key is thrown away each time; this grants nothing
//! a caller could not already do with sigstore directly. `#[doc(hidden)]` — integration tests
//! need it `pub`, but it is not part of the supported surface.
use crate::TrustPolicy;
use anyhow::{Result, anyhow};
use sigstore::crypto::SigningScheme;
use sigstore::crypto::signing_key::SigStoreSigner;

/// A throwaway signer holding one ephemeral keypair, so the same key can sign both the
/// component and the SBOM (and a matching `TrustPolicy` trusts exactly that key).
pub struct TestSigner {
    signer: SigStoreSigner,
    public_key_pem: String,
}

impl TestSigner {
    pub fn new() -> Result<Self> {
        let signer = SigningScheme::ECDSA_P256_SHA256_ASN1
            .create_signer()
            .map_err(|e| anyhow!("create_signer: {e}"))?;
        let public_key_pem = signer
            .to_sigstore_keypair()
            .map_err(|e| anyhow!("to_sigstore_keypair: {e}"))?
            .public_key_to_pem()
            .map_err(|e| anyhow!("public_key_to_pem: {e}"))?;
        Ok(Self {
            signer,
            public_key_pem,
        })
    }

    /// Raw DER ECDSA signature over `msg` (the shape `SignedArtifact` expects).
    pub fn sign(&self, msg: &[u8]) -> Result<Vec<u8>> {
        self.signer.sign(msg).map_err(|e| anyhow!("sign: {e}"))
    }

    pub fn public_key_pem(&self) -> &str {
        &self.public_key_pem
    }

    /// A `TrustPolicy` that trusts exactly this signer's key.
    pub fn trust_policy(&self) -> Result<TrustPolicy> {
        TrustPolicy::from_pem_keys([self.public_key_pem.as_bytes()])
    }
}

/// The compiled `filter-hello` component bytes — the shared conformance fixture, built by
/// this crate's `build.rs`. Exposed so dependent crates (e.g. `plecto-control`) can load a
/// real `plecto:filter` component in their own tests.
pub fn filter_hello_component() -> Vec<u8> {
    std::fs::read(env!("FILTER_HELLO_COMPONENT")).expect("read filter-hello component")
}

/// The compiled `filter-apikey` component bytes — the real-world example filter (an API-key
/// auth gate), built by this crate's `build.rs`. Exposed so the server's `wasm-auth` example
/// can sign and load it through the production path.
pub fn filter_apikey_component() -> Vec<u8> {
    std::fs::read(env!("FILTER_APIKEY_COMPONENT")).expect("read filter-apikey component")
}

/// The compiled `filter-quickstart` component bytes — the minimal starter filter (stamps one
/// response header) behind the `quickstart` example, built by this crate's `build.rs`.
pub fn filter_quickstart_component() -> Vec<u8> {
    std::fs::read(env!("FILTER_QUICKSTART_COMPONENT")).expect("read filter-quickstart component")
}

/// The compiled `filter-noop` component bytes — the "pure WASM no-op" rung of the benchmark
/// cost ladder (no host-API calls), built by this crate's `build.rs`.
pub fn filter_noop_component() -> Vec<u8> {
    std::fs::read(env!("FILTER_NOOP_COMPONENT")).expect("read filter-noop component")
}

/// The compiled `filter-resp` component bytes — ADR 000073 response-context / `replace` ladder
/// rungs (no host-API calls), built by this crate's `build.rs`.
pub fn filter_resp_component() -> Vec<u8> {
    std::fs::read(env!("FILTER_RESP_COMPONENT")).expect("read filter-resp component")
}

/// The compiled `filter-cors` component bytes — the CORS reference filter (ADR 000073 / the F2
/// shelf, ADR 000068), built by this crate's `build.rs`.
pub fn filter_cors_component() -> Vec<u8> {
    std::fs::read(env!("FILTER_CORS_COMPONENT")).expect("read filter-cors component")
}

/// The compiled `filter-compat-v02` component bytes — the fixture pinned to the FROZEN
/// `plecto:filter@0.2.0` contract, keeping the V02 adapter rail covered now that the in-tree
/// default is 0.3.0 (ADR 000073). Built by this crate's `build.rs`.
pub fn filter_compat_v02_component() -> Vec<u8> {
    std::fs::read(env!("FILTER_COMPAT_V02_COMPONENT")).expect("read filter-compat-v02 component")
}

/// The compiled `filter-extauthz` component bytes — the outbound-HTTP example (an ext_authz-style
/// gate), built by this crate's `build.rs` when the `outbound-http` feature is on (ADR 000036).
#[cfg(feature = "outbound-http")]
pub fn filter_extauthz_component() -> Vec<u8> {
    std::fs::read(env!("FILTER_EXTAUTHZ_COMPONENT")).expect("read filter-extauthz component")
}

/// The compiled `filter-jwt` component bytes — JWT Resource-Server reference (ADR 000070), built
/// by this crate's `build.rs` when the `outbound-http` feature is on (JWKS path needs it).
#[cfg(feature = "outbound-http")]
pub fn filter_jwt_component() -> Vec<u8> {
    std::fs::read(env!("FILTER_JWT_COMPONENT")).expect("read filter-jwt component")
}

/// The compiled `filter-tcp-gate` component bytes — the outbound-TCP example (a raw-TCP consult
/// gate), built by this crate's `build.rs` when the `outbound-tcp` feature is on (ADR 000060).
#[cfg(feature = "outbound-tcp")]
pub fn filter_tcp_gate_component() -> Vec<u8> {
    std::fs::read(env!("FILTER_TCP_GATE_COMPONENT")).expect("read filter-tcp-gate component")
}

/// The compiled `filter-ratelimit-redis` component bytes — the global-layer reference filter of
/// the local-floor × global two-tier rate-limit model (ADR 000061), built by this crate's
/// `build.rs` when the `outbound-tcp` feature is on (it consults its backend over outbound TCP).
#[cfg(feature = "outbound-tcp")]
pub fn filter_ratelimit_redis_component() -> Vec<u8> {
    std::fs::read(env!("FILTER_RATELIMIT_REDIS_COMPONENT"))
        .expect("read filter-ratelimit-redis component")
}

/// The SBOM-binding helper moved to `dev_signer` (ADR 000065): it is now production code,
/// shared by `plecto conformance`'s self-signed load check and the dev-key flow, not just
/// tests. Re-exported here so the existing test suites keep importing it from
/// `test_support::bound_sbom` unchanged.
pub use crate::dev_signer::bound_sbom;