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.NK-980IOT测试之CRYPTO

发布于 2022-03-16 22:10:17 浏览：1033 订阅该版

hwcrypto 是一个硬件加解密设备驱动框架。主要由硬件加解密驱动抽象层以及各种加解密 API 接口两部分构成。对于上层应用，可对接安全套件或直接使用，使用方式十分灵活。对于驱动，需要对接的接口少，功能单一，驱动开发简单快捷。下图是 Crypto 框架层次图:
![crypto照片.png](https://oss-club.rt-thread.org/uploads/20220313/1658a1dfe0014fbfc547727a045feeb8.png.webp)

#功能模块的硬件介绍

NK-980Iot支持PRNG，AES，SHA，HMAC，RSA和ECC算法。
##官方手册介绍
>Overview
>The Crypto (Cryptographic Accelerator) includes a secure pseudo random number generator (PRNG)
core and supports AES, SHA, HMAC, RSA and ECC algorithms.
The PRNG core supports 64 bits, 128 bits, 192 bits, and 256 bits random number generation.
The AES accelerator is an implementation fully compliant with the AES (Advance Encryption
Standard) encryption and decryption algorithm. The AES accelerator supports ECB, CBC, CFB, OFB,
CTR, CBC-CS1, CBC-CS2, and CBC-CS3 mode.
The SHA accelerator is an implementation fully compliant with the SHA-160, SHA-224, SHA-256,
SHA-384, and SHA-512 and corresponding HMAC algorithms.
The ECC accelerator is an implementation fully compliant with elliptic curve cryptography by using
polynomial basis in binary field and prime filed.
The RSA accelerator is an implementation fully compliant with 1024 and 2048 bit RSA cryptography.
>Features
PRNG
– Supports 64 bits, 128 bits, 192 bits, and 256 bits random number generation
AES
– Supports FIPS NIST 197
– Supports SP800-38A and addendum
– Supports 128, 192, and 256 bits key
– Supports both encryption and decryption
– Supports ECB, CBC, CFB, OFB, CTR, CBC-CS1, CBC-CS2, and CBC-CS3 mode
– Supports key expander
 SHA
– Supports FIPS NIST 180, 180-2
– Supports SHA-160, SHA-224, SHA-256, SHA-384, and SHA-512
HMAC
– Supports FIPS NIST 180, 180-2
– Supports HMAC-SHA-160, HMAC-SHA-224, HMAC-SHA-256, HMAC-SHA-384, and
HMAC-SHA-512
ECC
– Supports both prime field GF(p) and binary filed GF(2m)
– Supports NIST P-192, P-224, P-256, P-384, and P-521
– Supports NIST B-163, B-233, B-283, B-409, and B-571
– Supports NIST K-163, K-233, K-283, K-409, and K-571
– Supports point multiplication, addition and doubling operations in GF(p) and GF(2m)
– Supports modulus division, multiplication, addition and subtraction operations in GF(p)
RSA
– Supports both encryption and decryption
– Supports up to 2048 bits

##功能模块的使用说明
###硬件环境：

![nu980.png](https://oss-club.rt-thread.org/uploads/20220313/27d5be2773fb9101eae6c0e30e2d741a.png.webp)
NU980Iot开发板
两根usb数据线
###软件环境：
RT-Thread Studio
NuWriter
Putty
#外设性能指标测试
##目标
使用AES对明文进行加密
##创建工程
File->New->RT-Thread Project
选择Base On Board

![工程选择nu980.png](https://oss-club.rt-thread.org/uploads/20220313/43b4532316ce2d407eae130a7de09249.png.webp)

##编写代码
创建crypto.c 文档 编写代码
```
#include "rtthread.h"
#include "rtdevice.h"
#include "rtdbg.h"
#include "string.h"
#include "stdlib.h"

static const rt_uint8_t key[16] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xA, 0xB, 0xC, 0xD, 0xE, 0xF};

static void aes_sample(int argc, void **argv)
{
    rt_uint8_t buf_in[32];
    rt_uint8_t buf_out[32];
    int i;

struct rt_hwcrypto_ctx *ctx;
    hwcrypto_type type;

if(0==rt_strcmp(argv[1],"ecb"))
    {
        type=HWCRYPTO_TYPE_AES_ECB;
    }
    else if(0==rt_strcmp(argv[1],"cbc"))
    {
        type=HWCRYPTO_TYPE_AES_CBC;
    }
    else if(0==rt_strcmp(argv[1],"cfb"))
    {
        type=HWCRYPTO_TYPE_AES_CFB;
    }
    else if(0==rt_strcmp(argv[1],"ctr"))
    {
        type=HWCRYPTO_TYPE_AES_CTR;
    }
    else if(0==rt_strcmp(argv[1],"ofb"))
    {
        type=HWCRYPTO_TYPE_AES_OFB;
    }

for (i = 0; i < sizeof(buf_in); i++)
    {
        buf_in[i] = (rt_uint8_t)rand();
    }

ctx = rt_hwcrypto_symmetric_create(rt_hwcrypto_dev_default(), type);
    if (ctx == RT_NULL)
    {
        rt_kprintf("create AES-CBC context err!\r\n");
        return;
    }
    rt_hwcrypto_symmetric_setkey(ctx, key, 128);

rt_kprintf("plaintext:\r\n");

for (i = 0; i < 32; i++)
    {
            rt_kprintf("0x%02x ", buf_in[i]);
    }

rt_hwcrypto_symmetric_crypt(ctx, HWCRYPTO_MODE_ENCRYPT, 32, buf_in, buf_out);

rt_kprintf("ciphertext:\r\n");

for (i = 0; i < 32; i++)
    {
            rt_kprintf("0x%02x ", buf_out[i]);
    }

rt_hwcrypto_symmetric_destroy(ctx);
}
MSH_CMD_EXPORT(aes_sample, aes sample);
```

##编译烧写
编译代码
![faf5048ea523e893ee0f67b588c3756d.png](https://oss-club.rt-thread.org/uploads/20220313/faf5048ea523e893ee0f67b588c3756d.png)

打开终端Putty  
设置com，115200
复位nu980

![打开putty.png](https://oss-club.rt-thread.org/uploads/20220313/dcb2b15f13f1ad8b6b2210a8ece8134a.png)

烧写代码到内存

![下载.png](https://oss-club.rt-thread.org/uploads/20220313/fb6d4326f9d8c45dea6d6a465fa0508a.png.webp)

![crypto演示.png](https://oss-club.rt-thread.org/uploads/20220313/d621c4bd35c4c2f03abd2b2a7eff6cd4.png)

#可编译下载的代码gitee地址
[gitee地址](https://gitee.com/want_to_be_a_vassal/nu980-iot_crypto_qspi_ili9341lcd_test)
#心得体会
根据rtthread网站说明文档编写或者修改代码还是比较容易的。

#遇到的问题
使用下载程序到内存中发生错误，这问题还比较棘手，后续看是能找到问题所在。
![crypto测试错误.png](https://oss-club.rt-thread.org/uploads/20220316/27aafe49e8f37cf329625aee5ae93aa0.png)

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