psa: Add storage implementation for files
Add new functions, psa_load_persistent_key(),
psa_free_persistent_key_data(), and psa_save_persistent_key(), for
managing persistent keys. These functions load to or save from our
internal representation of key slots. Serialization is a concern of the
storage backend implementation and doesn't abstraction-leak into the
lifetime management code.
An initial implementation for files is provided. Additional storage
backends can implement this interface for other storage types.
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 89be6fe..7af7fcf 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -113,6 +113,7 @@
add_test_suite(psa_crypto)
add_test_suite(psa_crypto_hash)
add_test_suite(psa_crypto_metadata)
+add_test_suite(psa_crypto_storage_file)
add_test_suite(shax)
add_test_suite(ssl)
add_test_suite(timing)