feat: add TPM2 provider and WIT runtime for hardware crypto #36
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TPM2 Provider (Linux/Windows): - Implement Tpm2Provider with ECDSA P-256 signing - Auto-detect TCTI (device, resource manager, TBS, swtpm) - Platform-gated compilation (excluded on macOS) - DER signature encoding for p256 crate compatibility - Comprehensive tests (require swtpm simulator) WIT Runtime (wasmtime integration): - Add wsc:crypto WIT interface for hardware signing - Implement CryptoHostState bridging WIT to SecureKeyProvider - WscRuntime for hosting WASM components with hardware crypto - Support for key generation, signing, verification via opaque handles CI: - Add GitHub Actions workflow for TPM2 tests with swtpm - Compile checks for macOS and Windows 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Replace WSError::HardwareNotAvailable with WSError::HardwareError - Use NetworkTPMConfig instead of SwtpmConfig for swtpm connection - Use PublicKey::try_from for ECC public key extraction instead of matching on PublicKeyUnion - Implement load_key method (returns KeyNotFound for now) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Replace as_bytes() with value() for EccParameter - Replace WSError::InvalidSignature with InvalidKeyHandle/VerificationError - Use ctx.hash() to get Digest and HashcheckTicket for signing - Remove unused sha2::Digest import - Import MaxBuffer for hash data buffer 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Wrap TPM operations with execute_with_nullauth_session to provide necessary authorization context for: - create_primary (key generation) - hash and sign operations This fixes the "Not enough sessions provided for the command" error (0x0007000b) when running with swtpm simulator. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The tss-esapi crate doesn't have pre-generated bindings for Windows x86_64, causing CI failure. Windows TPM support would require a different implementation using the TBS (TPM Base Services) API. Changes: - Update Cargo.toml target to cfg(target_os = "linux") only - Update platform/mod.rs cfg guards to Linux-only - Update platform/tpm2.rs documentation - Update CI workflow with explanatory comments 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
Tpm2Providerfor hardware-backed ECDSA P-256 signing via TPM 2.0wsc:crypto) for hosting WASM components with hardware cryptoTPM2 Provider
tss-esapicrate (v7) for TSS2 API/dev/tpmrm0,/dev/tpm0, Windows TBS, orTPM2_TCTIenv varWIT Runtime
wsc:crypto/hardware-signingWIT interface for opaque key handle operationsCryptoHostState<P>bridges WIT to anySecureKeyProviderimplementationWscRuntime<P>for loading and running WASM componentsTest plan
--features tpm2