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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2017-2020, Linaro Limited
*/
#include <pkcs11_ta.h>
#include <stdbool.h>
#include <stdint.h>
#include <tee_internal_api.h>
#include <trace.h>
#include "pkcs11_token.h"
#include "serializer.h"
/*
* Util routines for serializes unformatted arguments in a client memref
*/
void serialargs_init(struct serialargs *args, void *in, size_t size)
{
args->start = in;
args->next = in;
args->size = size;
}
uint32_t serialargs_get(struct serialargs *args, void *out, size_t size)
{
if (args->next + size > args->start + args->size) {
EMSG("arg too short: full %zd, remain %zd, expect %zd",
args->size, args->size - (args->next - args->start), size);
return PKCS11_CKR_ARGUMENTS_BAD;
}
TEE_MemMove(out, args->next, size);
args->next += size;
return PKCS11_CKR_OK;
}
uint32_t serialargs_alloc_and_get(struct serialargs *args,
void **out, size_t size)
{
void *ptr = NULL;
if (!size) {
*out = NULL;
return PKCS11_CKR_OK;
}
if (args->next + size > args->start + args->size) {
EMSG("arg too short: full %zd, remain %zd, expect %zd",
args->size, args->size - (args->next - args->start), size);
return PKCS11_CKR_ARGUMENTS_BAD;
}
ptr = TEE_Malloc(size, TEE_MALLOC_FILL_ZERO);
if (!ptr)
return PKCS11_CKR_DEVICE_MEMORY;
TEE_MemMove(ptr, args->next, size);
args->next += size;
*out = ptr;
return PKCS11_CKR_OK;
}
uint32_t serialargs_get_ptr(struct serialargs *args, void **out, size_t size)
{
void *ptr = args->next;
if (!size) {
*out = NULL;
return PKCS11_CKR_OK;
}
if (args->next + size > args->start + args->size) {
EMSG("arg too short: full %zd, remain %zd, expect %zd",
args->size, args->size - (args->next - args->start), size);
return PKCS11_CKR_ARGUMENTS_BAD;
}
args->next += size;
*out = ptr;
return PKCS11_CKR_OK;
}
bool serialargs_remaining_bytes(struct serialargs *args)
{
return args->next < args->start + args->size;
}
enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
struct pkcs11_client *client,
struct pkcs11_session **sess)
{
uint32_t rv = PKCS11_CKR_GENERAL_ERROR;
uint32_t session_handle = 0;
struct pkcs11_session *session = NULL;
rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
if (rv)
return rv;
session = pkcs11_handle2session(session_handle, client);
if (!session)
return PKCS11_CKR_SESSION_HANDLE_INVALID;
*sess = session;
return PKCS11_CKR_OK;
}
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