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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-04-23 tyx the first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <hwcrypto.h>
/**
* @brief Setting context type (Direct calls are not recommended)
*
* @param ctx Crypto context
* @param type Types of settings
*
* @return RT_EOK on success.
*/
rt_err_t rt_hwcrypto_set_type(struct rt_hwcrypto_ctx *ctx, hwcrypto_type type)
{
if (ctx)
{
/* Is it the same category? */
if ((ctx->type & HWCRYPTO_MAIN_TYPE_MASK) == (type & HWCRYPTO_MAIN_TYPE_MASK))
{
ctx->type = type;
return RT_EOK;
}
/* Context is empty type */
else if (ctx->type == HWCRYPTO_TYPE_NULL)
{
ctx->type = type;
return RT_EOK;
}
else
{
return -RT_ERROR;
}
}
return -RT_EINVAL;
}
/**
* @brief Reset context type (Direct calls are not recommended)
*
* @param ctx Crypto context
*
*/
void rt_hwcrypto_ctx_reset(struct rt_hwcrypto_ctx *ctx)
{
if (ctx && ctx->device->ops->reset)
{
ctx->device->ops->reset(ctx);
}
}
/**
* @brief Init crypto context
*
* @param ctx The context to initialize
* @param device Hardware crypto device
* @param type Type of context
* @param obj_size Size of context object
*
* @return RT_EOK on success.
*/
rt_err_t rt_hwcrypto_ctx_init(struct rt_hwcrypto_ctx *ctx, struct rt_hwcrypto_device *device, hwcrypto_type type)
{
rt_err_t err;
/* Setting context type */
rt_hwcrypto_set_type(ctx, type);
ctx->device = device;
/* Create hardware context */
err = ctx->device->ops->create(ctx);
if (err != RT_EOK)
{
return err;
}
return RT_EOK;
}
/**
* @brief Create crypto context
*
* @param device Hardware crypto device
* @param type Type of context
* @param obj_size Size of context object
*
* @return Crypto context
*/
struct rt_hwcrypto_ctx *rt_hwcrypto_ctx_create(struct rt_hwcrypto_device *device, hwcrypto_type type, rt_uint32_t obj_size)
{
struct rt_hwcrypto_ctx *ctx;
rt_err_t err;
/* Parameter checking */
if (device == RT_NULL || obj_size < sizeof(struct rt_hwcrypto_ctx))
{
return RT_NULL;
}
ctx = rt_malloc(obj_size);
if (ctx == RT_NULL)
{
return ctx;
}
rt_memset(ctx, 0, obj_size);
/* Init context */
err = rt_hwcrypto_ctx_init(ctx, device, type);
if (err != RT_EOK)
{
rt_free(ctx);
ctx = RT_NULL;
}
return ctx;
}
/**
* @brief Destroy crypto context
*
* @param device Crypto context
*/
void rt_hwcrypto_ctx_destroy(struct rt_hwcrypto_ctx *ctx)
{
if (ctx == RT_NULL)
{
return;
}
/* Destroy hardware context */
if (ctx->device->ops->destroy)
{
ctx->device->ops->destroy(ctx);
}
/* Free the resources */
rt_free(ctx);
}
/**
* @brief Copy crypto context
*
* @param des The destination context
* @param src The context to be copy
*
* @return RT_EOK on success.
*/
rt_err_t rt_hwcrypto_ctx_cpy(struct rt_hwcrypto_ctx *des, const struct rt_hwcrypto_ctx *src)
{
if (des == RT_NULL || src == RT_NULL)
{
return -RT_EINVAL;
}
/* The equipment is different or of different types and cannot be copied */
if (des->device != src->device ||
(des->type & HWCRYPTO_MAIN_TYPE_MASK) != (src->type & HWCRYPTO_MAIN_TYPE_MASK))
{
return -RT_EINVAL;
}
des->type = src->type;
/* Calling Hardware Context Copy Function */
return src->device->ops->copy(des, src);
}
/**
* @brief Get the default hardware crypto device
*
* @return Hardware crypto device
*
*/
struct rt_hwcrypto_device *rt_hwcrypto_dev_default(void)
{
static struct rt_hwcrypto_device *hwcrypto_dev;
/* If there is a default device, return the device */
if (hwcrypto_dev)
{
return hwcrypto_dev;
}
/* Find by default device name */
hwcrypto_dev = (struct rt_hwcrypto_device *)rt_device_find(RT_HWCRYPTO_DEFAULT_NAME);
return hwcrypto_dev;
}
/**
* @brief Get the unique ID of the device
*
* @param device Device object
*
* @return Device unique ID
*/
rt_uint64_t rt_hwcrypto_id(struct rt_hwcrypto_device *device)
{
if (device)
{
return device->id;
}
return 0;
}
#ifdef RT_USING_DEVICE_OPS
const static struct rt_device_ops hwcrypto_ops =
{
RT_NULL,
RT_NULL,
RT_NULL,
RT_NULL,
RT_NULL,
RT_NULL
};
#endif
/**
* @brief Register hardware crypto device
*
* @param device Hardware crypto device
* @param name Name of device
*
* @return RT_EOK on success.
*/
rt_err_t rt_hwcrypto_register(struct rt_hwcrypto_device *device, const char *name)
{
rt_err_t err;
RT_ASSERT(device != RT_NULL);
RT_ASSERT(name != RT_NULL);
RT_ASSERT(device->ops != RT_NULL);
RT_ASSERT(device->ops->create != RT_NULL);
RT_ASSERT(device->ops->destroy != RT_NULL);
RT_ASSERT(device->ops->copy != RT_NULL);
RT_ASSERT(device->ops->reset != RT_NULL);
rt_memset(&device->parent, 0, sizeof(struct rt_device));
#ifdef RT_USING_DEVICE_OPS
device->parent.ops = &hwcrypto_ops;
#else
device->parent.init = RT_NULL;
device->parent.open = RT_NULL;
device->parent.close = RT_NULL;
device->parent.read = RT_NULL;
device->parent.write = RT_NULL;
device->parent.control = RT_NULL;
#endif
device->parent.user_data = RT_NULL;
device->parent.type = RT_Device_Class_Security;
/* Register device */
err = rt_device_register(&device->parent, name, RT_DEVICE_FLAG_RDWR);
return err;
}
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