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/*
* Copyright (c) 2016, 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 <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <tee_client_api.h>
#include <tee_supplicant.h>
#include "prof.h"
#ifndef __aligned
#define __aligned(x) __attribute__((__aligned__(x)))
#endif
#include <linux/tee.h>
TEEC_Result prof_process(size_t num_params, struct tee_ioctl_param *params,
const char *prefix)
{
char vers[5] = "";
char path[255] = { 0 };
size_t bufsize = 0;
TEEC_UUID *u = NULL;
int fd = -1;
void *buf = NULL;
int flags = 0;
int id = 0;
int st = 0;
int n = 0;
if (num_params != 3 ||
(params[0].attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) !=
TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT ||
(params[1].attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) !=
TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT ||
(params[2].attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) !=
TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT)
return TEEC_ERROR_BAD_PARAMETERS;
id = params[0].a;
if (MEMREF_SIZE(params + 1) != sizeof(TEEC_UUID))
return TEEC_ERROR_BAD_PARAMETERS;
u = tee_supp_param_to_va(params + 1);
if (!u)
return TEEC_ERROR_BAD_PARAMETERS;
buf = tee_supp_param_to_va(params + 2);
if (!buf)
return TEEC_ERROR_BAD_PARAMETERS;
bufsize = MEMREF_SIZE(params + 2);
if (id < 0 || id > 100)
return TEEC_ERROR_BAD_PARAMETERS;
flags = O_APPEND | O_WRONLY;
if (!id) {
/* id == 0 means create file */
flags |= O_CREAT | O_EXCL;
id = 1;
}
for (;;) {
if (id > 1) {
/*
* id == 1 is file 0 (no suffix), id == 2 is file .1
* etc.
*/
if (id > 100)
id = 100; /* Avoid GCC truncation warning */
snprintf(vers, sizeof(vers), ".%d", id - 1);
}
n = snprintf(path, sizeof(path),
"/tmp/%s"
"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x"
"%s.out",
prefix,
u->timeLow, u->timeMid, u->timeHiAndVersion,
u->clockSeqAndNode[0], u->clockSeqAndNode[1],
u->clockSeqAndNode[2], u->clockSeqAndNode[3],
u->clockSeqAndNode[4], u->clockSeqAndNode[5],
u->clockSeqAndNode[6], u->clockSeqAndNode[7],
vers);
if ((n < 0) || (n >= (int)sizeof(path)))
break;
fd = open(path, flags, 0644);
if (fd >= 0) {
do {
st = write(fd, buf, bufsize);
} while (st < 0 && errno == EINTR);
close(fd);
if (st < 0 || st != (int)bufsize)
break;
params[0].a = id;
goto success;
}
if (errno != EEXIST)
break;
if (id++ == 100)
break;
}
/* An error occurred */
return TEEC_ERROR_GENERIC;
success:
return TEEC_SUCCESS;
}
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