test.c

/*
Copyright (C) 2014 insane coder (http://insanecoding.blogspot.com/, http://chacha20.insanecoding.org/)

Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#define __USE_MINGW_ANSI_STDIO 1
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#ifdef __WIN32__
#include <malloc.h>
#elif defined(__linux__) || defined(__sun__)
#include <alloca.h>
#endif

#include <chacha20_simple.h> //Replace with header to another library if you want to test something else

#ifndef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif

void hex2byte(const char *hex, uint8_t *byte)
{
  while (*hex) { sscanf(hex, "%2hhx", byte++); hex += 2; }
}

void test_keystream(const char *text_key, const char *text_nonce, const char *text_value, unsigned int number)
{
  chacha20_ctx ctx;
  uint32_t output[16];
  unsigned int i = 0;
  uint8_t key[32];
  uint8_t nonce[8];
  size_t value_len = strlen(text_value) / 2;
  uint8_t *value = alloca(value_len);

  printf("Test Vector: Keystream #%u: ", number);

  hex2byte(text_key, key);
  hex2byte(text_nonce, nonce);
  hex2byte(text_value, value);
  chacha20_setup(&ctx, key, sizeof(key), nonce);

  while (i < value_len)
  {
    chacha20_block(&ctx, output);
    if (memcmp(output, value+i, MIN(sizeof(output), value_len-i)))
    {
      puts("Failed");
      return;
    }
    i += sizeof(output);
  }
  puts("Success");
}

void test_encipherment(const char *text_key, const char *text_nonce, const char *text_plain, const char *text_cipher, uint64_t counter, unsigned int number)
{
  chacha20_ctx ctx;
  size_t i = 0;
  uint8_t key[32];
  uint8_t nonce[8];
  size_t len = strlen(text_plain) / 2;
  uint8_t *plain = alloca(len);
  uint8_t *cipher = alloca(len);
  uint8_t *output = alloca(len);

  printf("Test Vector: Encipherment #%u: ", number);

  hex2byte(text_key, key);
  hex2byte(text_nonce, nonce);
  hex2byte(text_plain, plain);
  hex2byte(text_cipher, cipher);
  chacha20_setup(&ctx, key, sizeof(key), nonce);

  //Exact length test
  memset(output, 0, len);
  chacha20_counter_set(&ctx, counter);
  chacha20_encrypt(&ctx, plain, output, len);
  if (memcmp(output, cipher, len))
  {
    puts("Failed exact length");
    return;
  }
  //Fixed length tests
  while (i < len)
  {
    size_t j;
    ++i;
    memset(output, 0, len);
    chacha20_counter_set(&ctx, counter);
    for (j = 0; j < len; j += i)
    {
      chacha20_encrypt(&ctx, plain+j, output+j, MIN(i, len-j));
    }
    if (memcmp(output, cipher, len))
    {
      printf("Failed at round: %zu\n", i);
      return;
    }
  }
  //Random length tests
  for (i = 0; i < 1000; ++i)
  {
    size_t amount, j;
    memset(output, 0, len);
    chacha20_counter_set(&ctx, counter);
    for (j = 0; j < len; j += amount)
    {
      amount = rand() & 15;
      chacha20_encrypt(&ctx, plain+j, output+j, MIN(amount, len-j));
    }
    if (memcmp(output, cipher, len))
    {
      puts("Failed random tests 1");
      return;
    }
  }
  //Random length tests 2
  for (i = 0; i < 1000; ++i)
  {
    size_t amount, j;
    memset(output, 0, len);
    chacha20_counter_set(&ctx, counter);
    for (j = 0; j < len; j += amount)
    {
      amount = 65 + (rand() & 63);
      chacha20_encrypt(&ctx, plain+j, output+j, MIN(amount, len-j));
    }
    if (memcmp(output, cipher, len))
    {
      puts("Failed random tests 2");
      return;
    }
  }
  puts("Success");
}

int main()
{
  srand(0); //Test results will be consistent
  //http://tools.ietf.org/html/draft-agl-tls-chacha20poly1305-04#section-7
  test_keystream("0000000000000000000000000000000000000000000000000000000000000000", "0000000000000000", "76b8e0ada0f13d90405d6ae55386bd28bdd219b8a08ded1aa836efcc8b770dc7da41597c5157488d7724e03fb8d84a376a43b8f41518a11cc387b669b2ee6586", 1);
  test_keystream("0000000000000000000000000000000000000000000000000000000000000001", "0000000000000000", "4540f05a9f1fb296d7736e7b208e3c96eb4fe1834688d2604f450952ed432d41bbe2a0b6ea7566d2a5d1e7e20d42af2c53d792b1c43fea817e9ad275ae546963", 2);
  test_keystream("0000000000000000000000000000000000000000000000000000000000000000", "0000000000000001", "de9cba7bf3d69ef5e786dc63973f653a0b49e015adbff7134fcb7df137821031e85a050278a7084527214f73efc7fa5b5277062eb7a0433e445f41e3", 3);
  test_keystream("0000000000000000000000000000000000000000000000000000000000000000", "0100000000000000", "ef3fdfd6c61578fbf5cf35bd3dd33b8009631634d21e42ac33960bd138e50d32111e4caf237ee53ca8ad6426194a88545ddc497a0b466e7d6bbdb0041b2f586b", 4);
  test_keystream("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f", "0001020304050607", "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", 5);
  //http://tools.ietf.org/html/draft-nir-cfrg-chacha20-poly1305-04#appendix-A.2
  test_encipherment("0000000000000000000000000000000000000000000000000000000000000000", "0000000000000000", "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", "76b8e0ada0f13d90405d6ae55386bd28bdd219b8a08ded1aa836efcc8b770dc7da41597c5157488d7724e03fb8d84a376a43b8f41518a11cc387b669b2ee6586", 0, 1);
  test_encipherment("0000000000000000000000000000000000000000000000000000000000000001", "0000000000000002", "416e79207375626d697373696f6e20746f20746865204945544620696e74656e6465642062792074686520436f6e7472696275746f7220666f72207075626c69636174696f6e20617320616c6c206f722070617274206f6620616e204945544620496e7465726e65742d4472616674206f722052464320616e6420616e792073746174656d656e74206d6164652077697468696e2074686520636f6e74657874206f6620616e204945544620616374697669747920697320636f6e7369646572656420616e20224945544620436f6e747269627574696f6e222e20537563682073746174656d656e747320696e636c756465206f72616c2073746174656d656e747320696e20494554462073657373696f6e732c2061732077656c6c206173207772697474656e20616e6420656c656374726f6e696320636f6d6d756e69636174696f6e73206d61646520617420616e792074696d65206f7220706c6163652c207768696368206172652061646472657373656420746f", "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", 1, 2);
  test_encipherment("1c9240a5eb55d38af333888604f6b5f0473917c1402b80099dca5cbc207075c0", "0000000000000002", "2754776173206272696c6c69672c20616e642074686520736c6974687920746f7665730a446964206779726520616e642067696d626c6520696e2074686520776162653a0a416c6c206d696d737920776572652074686520626f726f676f7665732c0a416e6420746865206d6f6d65207261746873206f757467726162652e", "62e6347f95ed87a45ffae7426f27a1df5fb69110044c0d73118effa95b01e5cf166d3df2d721caf9b21e5fb14c616871fd84c54f9d65b283196c7fe4f60553ebf39c6402c42234e32a356b3e764312a61a5532055716ead6962568f87d3f3f7704c6a8d1bcd1bf4d50d6154b6da731b187b58dfd728afa36757a797ac188d1", 42, 3);
  return(0);
}