Rename libpsa to libpsats

Instead of using a generic name for the library, give it a TS specific
name to avoid possible naming collisions with other psa libraries in
the future.

Change-Id: Icea9be4d836f7d22300b20c8d6a5f8bd8fae1133
Signed-off-by: Gabor Toth <gabor.toth2@arm.com>
diff --git a/components/common/libpsats/libpsats-crypto.c b/components/common/libpsats/libpsats-crypto.c
new file mode 100644
index 0000000..cb4b6f0
--- /dev/null
+++ b/components/common/libpsats/libpsats-crypto.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2023, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <protocols/rpc/common/packed-c/encoding.h>
+#include <service/crypto/client/psa/psa_crypto_client.h>
+#include <service_locator.h>
+#include <stdio.h>
+
+#include "libpsats.h"
+#include "trace.h"
+
+static struct rpc_caller_session *rpc_session;
+static struct service_context *crypto_service_context;
+
+LIBPSATS_EXPORTED psa_status_t libpsats_init_crypto_context(const char *service_name)
+{
+	psa_status_t result = PSA_ERROR_GENERIC_ERROR;
+
+	if (rpc_session || crypto_service_context) {
+		EMSG("The client is already initialized\n");
+		return result;
+	}
+
+	service_locator_init();
+
+	crypto_service_context = service_locator_query(service_name);
+
+	if (!crypto_service_context) {
+		EMSG("Failed to discover service\n");
+		return result;
+	}
+
+	rpc_session = service_context_open(crypto_service_context);
+
+	if (!rpc_session) {
+		EMSG("Failed to open rpc session\n");
+		libpsats_deinit_crypto_context();
+		return result;
+	}
+
+	result = psa_crypto_client_init(rpc_session);
+
+	if (result)
+		EMSG("psa_crypto_client_init failed\n");
+
+	return result;
+}
+
+LIBPSATS_EXPORTED void libpsats_deinit_crypto_context(void)
+{
+	psa_crypto_client_deinit();
+
+	if (crypto_service_context && rpc_session) {
+		service_context_close(crypto_service_context, rpc_session);
+		rpc_session = NULL;
+	}
+
+	if (crypto_service_context) {
+		service_context_relinquish(crypto_service_context);
+		crypto_service_context = NULL;
+	}
+}