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//! Live TPM 2.0 Integration
//!
//! Provides the acquisition layer for collecting real TPM quotes, PCRs,
//! and capabilities using `tss-esapi`. Verification is strictly handled
//! by native parsers, not by this layer.
#![cfg(feature = "live-evidence")]
use crate::digest::DigestAlgorithm;
use alloc::string::String;
use alloc::vec::Vec;
/// Represents a live connection to a local TPM 2.0 device.
#[derive(Debug)]
pub struct LiveTpmDevice {
pub device_path: String,
pub manufacturer: String,
pub firmware_version: String,
pub supported_banks: Vec<DigestAlgorithm>,
}
impl LiveTpmDevice {
/// Connects to the TPM device (e.g. `/dev/tpmrm0`).
pub fn connect(device_path: &str) -> Result<Self, &'static str> {
// Implementation would initialize a tss_esapi Context
// For now, we return a stubbed connection since we are separating acquisition.
Ok(Self {
device_path: device_path.into(),
manufacturer: String::from("Unknown"),
firmware_version: String::from("0.0.0"),
supported_banks: alloc::vec![DigestAlgorithm::Sha256, DigestAlgorithm::Sha384],
})
}
/// Reads the requested PCR bank from the live TPM.
pub fn read_pcr_bank(&self, _bank: DigestAlgorithm) -> Result<Vec<u8>, &'static str> {
Err("not implemented")
}
/// Acquires a real TPM quote for the specified PCRs.
pub fn acquire_quote(
&self,
_nonce: &[u8],
_pcr_indices: &[u32],
) -> Result<Vec<u8>, &'static str> {
Err("not implemented")
}
/// Reads the internal TPM clock and reset counters for freshness semantics.
pub fn read_clock_info(&self) -> Result<(u64, u32), &'static str> {
Err("not implemented")
}
/// Validates capabilities and rejects unsupported/weak algorithms (e.g., SHA-1).
pub fn read_capabilities(&self) -> Result<(), &'static str> {
Err("not implemented")
}
}