feat: initial commit

Signed-off-by: Harald Hoyer <harald@matterlabs.dev>

src/quote/mod.rs

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright (c) 2023-2024 Matter Labs
+
+//! Get a quote from a TEE
+
+use crate::sgx::sgx_gramine_get_quote;
+use std::io;
+
+#[derive(Debug, thiserror::Error)]
+#[allow(missing_docs)]
+#[error("{msg}")]
+pub struct GetQuoteError {
+    pub(crate) msg: Box<str>,
+    #[source] // optional if field name is `source`
+    pub(crate) source: io::Error,
+}
+
+/// Get the attestation quote from a TEE
+pub fn get_quote(report_data: &[u8]) -> Result<Box<[u8]>, GetQuoteError> {
+    // check, if we are running in a TEE
+    if std::fs::metadata("/dev/attestation").is_ok() {
+        if report_data.len() > 64 {
+            return Err(GetQuoteError {
+                msg: "Report data too long".into(),
+                source: io::Error::new(io::ErrorKind::Other, "Report data too long"),
+            });
+        }
+
+        let mut report_data_fixed = [0u8; 64];
+        report_data_fixed[..report_data.len()].copy_from_slice(report_data);
+
+        sgx_gramine_get_quote(&report_data_fixed)
+    } else {
+        // if not, return an error
+        Err(GetQuoteError {
+            msg: "Not running in a TEE".into(),
+            source: io::Error::new(io::ErrorKind::Other, "Not running in a TEE"),
+        })
+    }
+}