Arduino上的AES128加密

Question

我正在尝试使用arduino将数据加密为AES128，然后将其解密。我也在尝试AES192和AES256，但首先我想使其与AES128一起使用。我正在使用Cyptography库，正在努力弄清这里发生了什么。在下面的代码中，您可能会发现testVector有一个可以识别它的名称，一个唯一密钥，纯文本和密文。当我尝试修改数组中的“ .plaintext”时，它将导致加密并因此导致解密失败。我的目标是先加密“我的消息”，然后再解密后遗症。

请在下面查看我的代码：

#include <Crypto.h>
#include <AES.h>
#include <string.h>

struct TestVector
{ 
    const char *name;
    byte key[32];
    byte plaintext[16];
    byte ciphertext[16];
};

// Define the ECB test vectors from the FIPS specification.
static TestVector const testVectorAES128 = {
    .name        = "AES-128-ECB",
    .key         = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
                    0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F},
    .plaintext   = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
                    0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF},
    .ciphertext  = {0x69, 0xC4, 0xE0, 0xD8, 0x6A, 0x7B, 0x04, 0x30,
                    0xD8, 0xCD, 0xB7, 0x80, 0x70, 0xB4, 0xC5, 0x5A}
};
static TestVector const testVectorAES192 = {
    .name        = "AES-192-ECB",
    .key         = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
                    0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
                    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17},
    .plaintext   = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
                    0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF},
    .ciphertext  = {0xDD, 0xA9, 0x7C, 0xA4, 0x86, 0x4C, 0xDF, 0xE0,
                    0x6E, 0xAF, 0x70, 0xA0, 0xEC, 0x0D, 0x71, 0x91}
};
static TestVector const testVectorAES256 = {
    .name        = "AES-256-ECB",
    .key         = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
                    0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
                    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
                    0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F},
    .plaintext   = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
                    0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF},
    .ciphertext  = {0x8E, 0xA2, 0xB7, 0xCA, 0x51, 0x67, 0x45, 0xBF,
                    0xEA, 0xFC, 0x49, 0x90, 0x4B, 0x49, 0x60, 0x89}
};

AES128 aes128;
AES192 aes192;
AES256 aes256;

byte buffer[16];

void testCipher(BlockCipher *cipher, const struct TestVector *test)
{
    crypto_feed_watchdog();
    Serial.print(test->name);
    Serial.print(" Encryption ... ");
    cipher->setKey(test->key, cipher->keySize());
    cipher->encryptBlock(buffer, test->plaintext);
    if (memcmp(buffer, test->ciphertext, 16) == 0){
        Serial.println("Passed");
        String myString = String((char*)buffer);
        Serial.println(myString);
    }
    else
        Serial.println("Failed");

    Serial.print(test->name);
    Serial.print(" Decryption ... ");
    cipher->decryptBlock(buffer, test->ciphertext);
    if (memcmp(buffer, test->plaintext, 16) == 0){
        Serial.println("Passed");
        String myString2 = String((char*)buffer);
        Serial.println(myString2);
    }
    else
        Serial.println("Failed");
}

void perfCipher(BlockCipher *cipher, const struct TestVector *test)
{
    unsigned long start;
    unsigned long elapsed;
    int count;

    crypto_feed_watchdog();

    Serial.print(test->name);
    Serial.print(" Set Key ... ");
    start = micros();
    for (count = 0; count < 10000; ++count) {
        cipher->setKey(test->key, cipher->keySize());
    }
    elapsed = micros() - start;
    Serial.print(elapsed / 10000.0);
    Serial.print("us per operation, ");
    Serial.print((10000.0 * 1000000.0) / elapsed);
    Serial.println(" per second");

    Serial.print(test->name);
    Serial.print(" Encrypt ... ");
    start = micros();
    for (count = 0; count < 5000; ++count) {
        cipher->encryptBlock(buffer, buffer);
    }
    elapsed = micros() - start;
    Serial.print(elapsed / (5000.0 * 16.0));
    Serial.print("us per byte, ");
    Serial.print((16.0 * 5000.0 * 1000000.0) / elapsed);
    Serial.println(" bytes per second");

    Serial.print(test->name);
    Serial.print(" Decrypt ... ");
    start = micros();
    for (count = 0; count < 5000; ++count) {
        cipher->decryptBlock(buffer, buffer);
    }
    elapsed = micros() - start;
    Serial.print(elapsed / (5000.0 * 16.0));
    Serial.print("us per byte, ");
    Serial.print((16.0 * 5000.0 * 1000000.0) / elapsed);
    Serial.println(" bytes per second");

    Serial.println();
}

void setup()
{
    Serial.begin(9600);

    Serial.println();

    Serial.println("State Sizes:");
    Serial.print("AES128 ... ");
    Serial.println(sizeof(AES128));
    Serial.print("AES192 ... ");
    Serial.println(sizeof(AES192));
    Serial.print("AES256 ... ");
    Serial.println(sizeof(AES256));
    Serial.println();

    Serial.println("Test Vectors:");
    testCipher(&aes128, &testVectorAES128);
    testCipher(&aes192, &testVectorAES192);
    testCipher(&aes256, &testVectorAES256);

    Serial.println();

    Serial.println("Performance Tests:");
    perfCipher(&aes128, &testVectorAES128);
    perfCipher(&aes192, &testVectorAES192);
    perfCipher(&aes256, &testVectorAES256);
}

void loop()
{
}

以下是图书馆的一些信息：

https://rweather.github.io/arduinolibs/classBlockCipher.html#ac3ba2450222aa1ea804ae4881ab6440c