ta/sha_perf/ta_sha_perf.c

/*
 * Copyright (c) 2015, Linaro Limited
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <tee_internal_api.h>
#include <tee_ta_api.h>
#include <string.h>
#include <trace.h>

#include "ta_sha_perf.h"
#include "ta_sha_perf_priv.h"

#define CHECK(res, name, action) do {			\
		if ((res) != TEE_SUCCESS) {		\
			DMSG(name ": 0x%08x", (res));	\
			action				\
		}					\
	} while(0)

static TEE_OperationHandle digest_op = NULL;

TEE_Result cmd_process(uint32_t param_types, TEE_Param params[4])
{
	TEE_Result res = TEE_ERROR_GENERIC;
	int n = 0;
	void *in = NULL;
	void *out = NULL;
	uint32_t insz = 0;
	uint32_t outsz = 0;
	uint32_t offset = 0;
	uint32_t exp_param_types = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INPUT,
						   TEE_PARAM_TYPE_MEMREF_OUTPUT,
						   TEE_PARAM_TYPE_VALUE_INPUT,
						   TEE_PARAM_TYPE_NONE);

	if (param_types != exp_param_types)
		return TEE_ERROR_BAD_PARAMETERS;

	offset = params[2].value.b;
	in = (uint8_t *)params[0].memref.buffer + offset;
	insz = params[0].memref.size - offset;
	out = params[1].memref.buffer;
	outsz = params[1].memref.size;
	n = params[2].value.a;

	while (n--) {
		res = TEE_DigestDoFinal(digest_op, in, insz, out, &outsz);
		CHECK(res, "TEE_DigestDoFinal", return res;);
	}
	return TEE_SUCCESS;
}

TEE_Result cmd_prepare_op(uint32_t param_types, TEE_Param params[4])
{
	TEE_Result res = TEE_ERROR_GENERIC;
	uint32_t algo = 0;
	uint32_t exp_param_types = TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_INPUT,
						   TEE_PARAM_TYPE_NONE,
						   TEE_PARAM_TYPE_NONE,
						   TEE_PARAM_TYPE_NONE);

	if (param_types != exp_param_types)
		return TEE_ERROR_BAD_PARAMETERS;

	switch (params[0].value.a) {
	case TA_SHA_SHA1:
		algo = TEE_ALG_SHA1;
		break;
	case TA_SHA_SHA224:
		algo = TEE_ALG_SHA224;
		break;
	case TA_SHA_SHA256:
		algo = TEE_ALG_SHA256;
		break;
	case TA_SHA_SHA384:
		algo = TEE_ALG_SHA384;
		break;
	case TA_SHA_SHA512:
		algo = TEE_ALG_SHA512;
		break;
	default:
		return TEE_ERROR_BAD_PARAMETERS;
	}

	if (digest_op)
		TEE_FreeOperation(digest_op);

	res = TEE_AllocateOperation(&digest_op, algo, TEE_MODE_DIGEST, 0);
	CHECK(res, "TEE_AllocateOperation", return res;);

	return TEE_SUCCESS;
}


void cmd_clean_res(void)
{
	if (digest_op)
		TEE_FreeOperation(digest_op);	
}