chacha20poly1305testvectorARDUINO

#include <ChaChaPoly.h>

void setup() {
  Serial.begin(9600);
  // put your setup code here, to run once:
  uint8_t key[32] = {
    0x1C, 0x92, 0x40, 0xA5, 0xEB, 0x55, 0xD3, 0x8A, 
    0xF3, 0x33, 0x88, 0x86, 0x04, 0xF6, 0xB5, 0xF0, 
    0x47, 0x39, 0x17, 0xC1, 0x40, 0x2B, 0x80, 0x09, 
    0x9D, 0xCA, 0x5C, 0xBC, 0x20, 0x70, 0x75, 0xC0
  };

  uint8_t plaintext[265] = {
    0x49, 0x6E, 0x74, 0x65, 0x72, 0x6E, 0x65, 0x74, 
    0x2D, 0x44, 0x72, 0x61, 0x66, 0x74, 0x73, 0x20, 
    0x61, 0x72, 0x65, 0x20, 0x64, 0x72, 0x61, 0x66, 
    0x74, 0x20, 0x64, 0x6F, 0x63, 0x75, 0x6D, 0x65, 
    0x6E, 0x74, 0x73, 0x20, 0x76, 0x61, 0x6C, 0x69, 
    0x64, 0x20, 0x66, 0x6F, 0x72, 0x20, 0x61, 0x20, 
    0x6D, 0x61, 0x78, 0x69, 0x6D, 0x75, 0x6D, 0x20, 
    0x6F, 0x66, 0x20, 0x73, 0x69, 0x78, 0x20, 0x6D, 
    0x6F, 0x6E, 0x74, 0x68, 0x73, 0x20, 0x61, 0x6E, 
    0x64, 0x20, 0x6D, 0x61, 0x79, 0x20, 0x62, 0x65, 
    0x20, 0x75, 0x70, 0x64, 0x61, 0x74, 0x65, 0x64, 
    0x2C, 0x20, 0x72, 0x65, 0x70, 0x6C, 0x61, 0x63, 
    0x65, 0x64, 0x2C, 0x20, 0x6F, 0x72, 0x20, 0x6F, 
    0x62, 0x73, 0x6F, 0x6C, 0x65, 0x74, 0x65, 0x64, 
    0x20, 0x62, 0x79, 0x20, 0x6F, 0x74, 0x68, 0x65, 
    0x72, 0x20, 0x64, 0x6F, 0x63, 0x75, 0x6D, 0x65, 
    0x6E, 0x74, 0x73, 0x20, 0x61, 0x74, 0x20, 0x61, 
    0x6E, 0x79, 0x20, 0x74, 0x69, 0x6D, 0x65, 0x2E, 
    0x20, 0x49, 0x74, 0x20, 0x69, 0x73, 0x20, 0x69, 
    0x6E, 0x61, 0x70, 0x70, 0x72, 0x6F, 0x70, 0x72, 
    0x69, 0x61, 0x74, 0x65, 0x20, 0x74, 0x6F, 0x20, 
    0x75, 0x73, 0x65, 0x20, 0x49, 0x6E, 0x74, 0x65, 
    0x72, 0x6E, 0x65, 0x74, 0x2D, 0x44, 0x72, 0x61, 
    0x66, 0x74, 0x73, 0x20, 0x61, 0x73, 0x20, 0x72, 
    0x65, 0x66, 0x65, 0x72, 0x65, 0x6E, 0x63, 0x65, 
    0x20, 0x6D, 0x61, 0x74, 0x65, 0x72, 0x69, 0x61, 
    0x6C, 0x20, 0x6F, 0x72, 0x20, 0x74, 0x6F, 0x20, 
    0x63, 0x69, 0x74, 0x65, 0x20, 0x74, 0x68, 0x65, 
    0x6D, 0x20, 0x6F, 0x74, 0x68, 0x65, 0x72, 0x20, 
    0x74, 0x68, 0x61, 0x6E, 0x20, 0x61, 0x73, 0x20, 
    0x2F, 0xE2, 0x80, 0x9C, 0x77, 0x6F, 0x72, 0x6B, 
    0x20, 0x69, 0x6E, 0x20, 0x70, 0x72, 0x6F, 0x67, 
    0x72, 0x65, 0x73, 0x73, 0x2E, 0x2F, 0xE2, 0x80, 
    0x9D    
  };

  uint8_t ad[12] = {
    0xF3, 0x33, 0x88, 0x86, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x4E, 0x91
  };

  uint8_t nonce[8] = {
    0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08
  };

  uint8_t ciphertext[265], tag[16];

  ChaChaPoly cipher;
  cipher.setKey(key, 32);
  cipher.setIV(nonce, 8);
  cipher.addAuthData(ad, 12);
  cipher.encrypt(ciphertext, plaintext, 265);
  cipher.computeTag(tag, 16);

  printHex(ciphertext, 265);
  printHex(tag, 16);
}

void loop() {
  // put your main code here, to run repeatedly:

}

/* Print contents of input in hexadecimal format */
void printHex(uint8_t *input, uint16_t len) {
 for (uint16_t i=0; i < len; i++) {
    if (i % 8 == 0) {
      Serial.println();
    }
    Serial.print("0x");
    if (input[i] < 16) {
      Serial.print('0'); 
    }
    Serial.print(input[i], HEX);
    if (i+1 != len) {
      Serial.print(", ");
    } else {
      Serial.println();
      Serial.println();
    }
 }
}