Rewrite key management & signing
Extend compos_helper to support signing, use it from CompOS.
Expose the public key from the VM. Rename compos_verify_key to
compos_verify and get it to verify the signature against the current
instance's public key.
Also move DICE access to compos_key_main. There's no use having it in
the library - neither the tests nor compos_verify can use it - and it
complicates the build rules.
There's a lot more that can be deleted, but I'll do that in a
follow-up; this is big enough already.
Bug: 218494522
Test: atest CompOsSigningHostTest CompOsDenialHostTest
Change-Id: I2d71f68a595d5ddadb2e7b16937fa6855f5db0ab
diff --git a/compos/verify/native/verify_native.cpp b/compos/verify/native/verify_native.cpp
new file mode 100644
index 0000000..2c43d95
--- /dev/null
+++ b/compos/verify/native/verify_native.cpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "verify_native.h"
+
+#include <compos_key.h>
+
+using rust::Slice;
+
+bool verify(Slice<const uint8_t> public_key, Slice<const uint8_t> signature,
+ Slice<const uint8_t> data) {
+ compos_key::PublicKey public_key_array;
+ compos_key::Signature signature_array;
+
+ if (public_key.size() != public_key_array.size() ||
+ signature.size() != signature_array.size()) {
+ return false;
+ }
+
+ std::copy(public_key.begin(), public_key.end(), public_key_array.begin());
+ std::copy(signature.begin(), signature.end(), signature_array.begin());
+
+ return compos_key::verify(public_key_array, signature_array, data.data(), data.size());
+}