[attestation] Verify client VM's DICE chain up to pvmfw payload
This cl validates Client VM's DICE chain up to the pvmfw payload
and parse the DICE chain payload to extract necessary fields
required for attestation.
Test: atest rialto_test
Bug: 278717513
Change-Id: Ia60ed9a65fc5ef4ed5fdb6804403035fa9d7c00e
diff --git a/service_vm/comm/src/csr.rs b/service_vm/comm/src/csr.rs
index 757d080..2a27f90 100644
--- a/service_vm/comm/src/csr.rs
+++ b/service_vm/comm/src/csr.rs
@@ -100,7 +100,8 @@
}
}
-fn try_as_bytes(v: Value, context: &str) -> coset::Result<Vec<u8>> {
+/// Reads the provided value `v` as bytes array.
+pub fn try_as_bytes(v: Value, context: &str) -> coset::Result<Vec<u8>> {
if let Value::Bytes(data) = v {
Ok(data)
} else {
@@ -110,7 +111,8 @@
}
}
-fn cbor_value_type(v: &Value) -> &'static str {
+/// Reads the type of the provided value `v`.
+pub fn cbor_value_type(v: &Value) -> &'static str {
match v {
Value::Integer(_) => "int",
Value::Bytes(_) => "bstr",