问题描述
我正在尝试使用串行读取进行 3DES 加密, 在 Github 中找到了这个 3DES 示例代码,
#include <DES.h>
DES des;
void setup() {
Serial.begin(9600);
Serial.println("Hello!");
}
void loop() {
destest();
tdestest();
delay(2000);
}
void destest()
{
byte out[8];
byte in[] = { 1,2,3,4,5,6,7,8 };
byte key[] = { 0x3b,0x38,0x98,0x37,0x15,0x20,0xf7,0x5e };
Serial.println();
Serial.println("========= DES test ==========");
//encrypt
Serial.print("Encrypt...");
unsigned long time = micros();
des.encrypt(out,in,key);
time = micros() - time;
Serial.print("done. (");
Serial.print(time);
Serial.println(" micros)");
printArray(out);
//decrypt
for (int i = 0; i < 8; i++)
{
in[i] = out[i];
}
Serial.print("Decrypt...");
time = micros();
des.decrypt(out,key);
time = micros() - time;
Serial.print("done. (");
Serial.print(time);
Serial.println(" micros)");
printArray(out);
}
void tdestest()
{
byte out[8];
byte in[] = { 1,8 };
byte key[] = {
0x3b,0x5e,// key A
0x92,0x2f,0xb5,0x10,0xc7,0x1f,0x43,0x6e,// key B
0x3b,// key C (in this case A)
};
Serial.println();
Serial.println("====== Triple-DES test ======");
//encrypt
Serial.print("Encrypt...");
unsigned long time = micros();
des.tripleEncrypt(out,key);
time = micros() - time;
Serial.print("done. (");
Serial.print(time);
Serial.println(" micros)");
printArray(out);
//decrypt
for (int i = 0; i < 8; i++)
{
in[i] = out[i];
}
Serial.print("Decrypt...");
time = micros();
des.tripleDecrypt(out,key);
time = micros() - time;
Serial.print("done. (");
Serial.print(time);
Serial.println(" micros)");
printArray(out);
}
void printArray(byte output[])
{
for (int i = 0; i < 8; i++)
{
if (output[i] < 0x10)
{
Serial.print("0");
}
Serial.print(output[i],HEX);
Serial.print(" ");
}
Serial.println();
}
我想从串行监视器获取用户串行输入以馈送 byte in[]
。它将加密用户输入,我会将用户输入填充为 8 个字节或将输入限制为 8 个。
图书馆:https://github.com/Octoate/ArduinoDES
解决方法
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