text: // Copyright (c) 2014-2016 The Bitcoin Core developers
  // Copyright (c) 2017 The Astral Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "crypto/aes.h"
  #include "crypto/chacha20.h"
  #include "crypto/ripemd160.h"
  #include "crypto/sha1.h"
  #include "crypto/sha256.h"
  #include "crypto/sha512.h"
  #include "crypto/hmac_sha256.h"
  #include "crypto/hmac_sha512.h"
  #include "random.h"
  #include "utilstrencodings.h"
  #include "test/test_astral.h"
  
  #include <vector>
  
  #include <boost/test/unit_test.hpp>
  #include <openssl/aes.h>
  #include <openssl/evp.h>
  #include <string>
  #include <iostream>
  
  BOOST_FIXTURE_TEST_SUITE(crypto_tests, BasicTestingSetup)
  
  //std::string hex_representation(const std::vector<unsigned char>& v) {
  //  std::stringstream stream;
  //  for (const auto num : v) {
  //	stream <<  std::hex << std::setw(2) << std::setfill('0') << (unsigned)num;
  //  }
  //  return stream.str();
  //}
  //
  //std::string string_representation(const std::__1::vector<unsigned char, std::__1::allocator<unsigned char>>& v) {
  //  std::stringstream stream;
  //  for (const auto num : v) {
  //	stream << (char)num;
  //  }
  //  return stream.str();
  //}
  
  
  template<typename Hasher, typename In, typename Out>
  void TestVector(const Hasher &h, const In &in, const Out &out) {
      Out hash;
      BOOST_CHECK(out.size() == h.OUTPUT_SIZE);
      hash.resize(out.size());
      {
          // Test that writing the whole input string at once works.
          Hasher(h).Write((unsigned char*)&in[0], in.size()).Finalize(&hash[0]);
          BOOST_CHECK(hash == out);
      }
      for (int i=0; i<32; i++) {
          // Test that writing the string broken up in random pieces works.
          Hasher hasher(h);
          size_t pos = 0;
          while (pos < in.size()) {
              size_t len = InsecureRandRange((in.size() - pos + 1) / 2 + 1);
              hasher.Write((unsigned char*)&in[pos], len);
              pos += len;
              if (pos > 0 && pos + 2 * out.size() > in.size() && pos < in.size()) {
                  // Test that writing the rest at once to a copy of a hasher works.
                  Hasher(hasher).Write((unsigned char*)&in[pos], in.size() - pos).Finalize(&hash[0]);
                  BOOST_CHECK(hash == out);
              }
          }
          hasher.Finalize(&hash[0]);
  //        std::stringstream hashStream;
  //        std::copy(hash.begin(), hash.end(), std::ostream_iterator<int>(hashStream, " "));
  //        std::stringstream hashStream;
  //        for (const auto num : hash) {
  //        	hashStream << "0x" << std::hex << std::setw(2) << std::setfill('0') << num
  //      		   << ' ';
  //        }
  //
  //        auto hashString = hex_representation(hash);
  //
  //        std::stringstream outStream;
  //        for (const auto num : out) {
  //        	outStream << "0x" << std::hex << std::setw(2) << std::setfill('0') << num
  //      		   << ' ';
  //        }
  
          //        std::copy(out.begin(), out.end(), std::ostream_iterator<int>(outStream, " "));
  //        auto outString = hex_representation(out);
  //        auto inString = string_representation(in);
  //        std::cout << "In: " << inString << std::endl;
  //        std::cout << "Failed: Hash is " << hashString << " but should be " << outString << std::endl;
          BOOST_CHECK(hash == out);
      }
  }
  
  
  void TestSHA1(const std::string &in, const std::string &hexout) { TestVector(CSHA1(), in, ParseHex(hexout));}
  void TestSHA256(const std::string &in, const std::string &hexout) { TestVector(CSHA256(), in, ParseHex(hexout));}
  void TestSHA512(const std::string &in, const std::string &hexout) { TestVector(CSHA512(), in, ParseHex(hexout));}
  void TestRIPEMD160(const std::string &in, const std::string &hexout) { TestVector(CRIPEMD160(), in, ParseHex(hexout));}
  
  void TestHMACSHA256(const std::string &hexkey, const std::string &hexin, const std::string &hexout) {
      std::vector<unsigned char> key = ParseHex(hexkey);
      TestVector(CHMAC_SHA256(key.data(), key.size()), ParseHex(hexin), ParseHex(hexout));
  }
  
  void TestHMACSHA512(const std::string &hexkey, const std::string &hexin, const std::string &hexout) {
      std::vector<unsigned char> key = ParseHex(hexkey);
      TestVector(CHMAC_SHA512(key.data(), key.size()), ParseHex(hexin), ParseHex(hexout));
  }
  
  void TestAES128(const std::string &hexkey, const std::string &hexin, const std::string &hexout)
  {
      std::vector<unsigned char> key = ParseHex(hexkey);
      std::vector<unsigned char> in = ParseHex(hexin);
      std::vector<unsigned char> correctout = ParseHex(hexout);
      std::vector<unsigned char> buf, buf2;
  
      assert(key.size() == 16);
      assert(in.size() == 16);
      assert(correctout.size() == 16);
      AES128Encrypt enc(key.data());
      buf.resize(correctout.size());
      buf2.resize(correctout.size());
      enc.Encrypt(buf.data(), in.data());
      BOOST_CHECK_EQUAL(HexStr(buf), HexStr(correctout));
      AES128Decrypt dec(key.data());
      dec.Decrypt(buf2.data(), buf.data());
      BOOST_CHECK_EQUAL(HexStr(buf2), HexStr(in));
  }
  
  void TestAES256(const std::string &hexkey, const std::string &hexin, const std::string &hexout)
  {
      std::vector<unsigned char> key = ParseHex(hexkey);
      std::vector<unsigned char> in = ParseHex(hexin);
      std::vector<unsigned char> correctout = ParseHex(hexout);
      std::vector<unsigned char> buf;
  
      assert(key.size() == 32);
      assert(in.size() == 16);
      assert(correctout.size() == 16);
      AES256Encrypt enc(key.data());
      buf.resize(correctout.size());
      enc.Encrypt(buf.data(), in.data());
      BOOST_CHECK(buf == correctout);
      AES256Decrypt dec(key.data());
      dec.Decrypt(buf.data(), buf.data());
      BOOST_CHECK(buf == in);
  }
  
  void TestAES128CBC(const std::string &hexkey, const std::string &hexiv, bool pad, const std::string &hexin, const std::string &hexout)
  {
      std::vector<unsigned char> key = ParseHex(hexkey);
      std::vector<unsigned char> iv = ParseHex(hexiv);
      std::vector<unsigned char> in = ParseHex(hexin);
      std::vector<unsigned char> correctout = ParseHex(hexout);
      std::vector<unsigned char> realout(in.size() + AES_BLOCKSIZE);
  
      // Encrypt the plaintext and verify that it equals the cipher
      AES128CBCEncrypt enc(key.data(), iv.data(), pad);
      int size = enc.Encrypt(in.data(), in.size(), realout.data());
      realout.resize(size);
      BOOST_CHECK(realout.size() == correctout.size());
      BOOST_CHECK_MESSAGE(realout == correctout, HexStr(realout) + std::string(" != ") + hexout);
  
      // Decrypt the cipher and verify that it equals the plaintext
      std::vector<unsigned char> decrypted(correctout.size());
      AES128CBCDecrypt dec(key.data(), iv.data(), pad);
      size = dec.Decrypt(correctout.data(), correctout.size(), decrypted.data());
      decrypted.resize(size);
      BOOST_CHECK(decrypted.size() == in.size());
      BOOST_CHECK_MESSAGE(decrypted == in, HexStr(decrypted) + std::string(" != ") + hexin);
  
      // Encrypt and re-decrypt substrings of the plaintext and verify that they equal each-other
      for(std::vector<unsigned char>::iterator i(in.begin()); i != in.end(); ++i)
      {
          std::vector<unsigned char> sub(i, in.end());
          std::vector<unsigned char> subout(sub.size() + AES_BLOCKSIZE);
          int _size = enc.Encrypt(sub.data(), sub.size(), subout.data());
          if (_size != 0)
          {
              subout.resize(_size);
              std::vector<unsigned char> subdecrypted(subout.size());
              _size = dec.Decrypt(subout.data(), subout.size(), subdecrypted.data());
              subdecrypted.resize(_size);
              BOOST_CHECK(decrypted.size() == in.size());
              BOOST_CHECK_MESSAGE(subdecrypted == sub, HexStr(subdecrypted) + std::string(" != ") + HexStr(sub));
          }
      }
  }
  
  void TestAES256CBC(const std::string &hexkey, const std::string &hexiv, bool pad, const std::string &hexin, const std::string &hexout)
  {
      std::vector<unsigned char> key = ParseHex(hexkey);
      std::vector<unsigned char> iv = ParseHex(hexiv);
      std::vector<unsigned char> in = ParseHex(hexin);
      std::vector<unsigned char> correctout = ParseHex(hexout);
      std::vector<unsigned char> realout(in.size() + AES_BLOCKSIZE);
  
      // Encrypt the plaintext and verify that it equals the cipher
      AES256CBCEncrypt enc(key.data(), iv.data(), pad);
      int size = enc.Encrypt(in.data(), in.size(), realout.data());
      realout.resize(size);
      BOOST_CHECK(realout.size() == correctout.size());
      BOOST_CHECK_MESSAGE(realout == correctout, HexStr(realout) + std::string(" != ") + hexout);
  
      // Decrypt the cipher and verify that it equals the plaintext
      std::vector<unsigned char> decrypted(correctout.size());
      AES256CBCDecrypt dec(key.data(), iv.data(), pad);
      size = dec.Decrypt(correctout.data(), correctout.size(), decrypted.data());
      decrypted.resize(size);
      BOOST_CHECK(decrypted.size() == in.size());
      BOOST_CHECK_MESSAGE(decrypted == in, HexStr(decrypted) + std::string(" != ") + hexin);
  
      // Encrypt and re-decrypt substrings of the plaintext and verify that they equal each-other
      for(std::vector<unsigned char>::iterator i(in.begin()); i != in.end(); ++i)
      {
          std::vector<unsigned char> sub(i, in.end());
          std::vector<unsigned char> subout(sub.size() + AES_BLOCKSIZE);
          int _size = enc.Encrypt(sub.data(), sub.size(), subout.data());
          if (_size != 0)
          {
              subout.resize(_size);
              std::vector<unsigned char> subdecrypted(subout.size());
              _size = dec.Decrypt(subout.data(), subout.size(), subdecrypted.data());
              subdecrypted.resize(_size);
              BOOST_CHECK(decrypted.size() == in.size());
              BOOST_CHECK_MESSAGE(subdecrypted == sub, HexStr(subdecrypted) + std::string(" != ") + HexStr(sub));
          }
      }
  }
  
  void TestChaCha20(const std::string &hexkey, uint64_t nonce, uint64_t seek, const std::string& hexout)
  {
      std::vector<unsigned char> key = ParseHex(hexkey);
      ChaCha20 rng(key.data(), key.size());
      rng.SetIV(nonce);
      rng.Seek(seek);
      std::vector<unsigned char> out = ParseHex(hexout);
      std::vector<unsigned char> outres;
      outres.resize(out.size());
      rng.Output(outres.data(), outres.size());
      BOOST_CHECK(out == outres);
  }
  
  std::string LongTestString(void) {
      std::string ret;
      for (int i=0; i<200000; i++) {
          ret += (unsigned char)(i);
          ret += (unsigned char)(i >> 4);
          ret += (unsigned char)(i >> 8);
          ret += (unsigned char)(i >> 12);
          ret += (unsigned char)(i >> 16);
      }
      return ret;
  }
  
  const std::string test1 = LongTestString();
  
  BOOST_AUTO_TEST_CASE(ripemd160_testvectors) {
      TestRIPEMD160("", "9c1185a5c5e9fc54612808977ee8f548b2258d31");
      TestRIPEMD160("abc", "8eb208f7e05d987a9b044a8e98c6b087f15a0bfc");
      TestRIPEMD160("message digest", "5d0689ef49d2fae572b881b123a85ffa21595f36");
      TestRIPEMD160("secure hash algorithm", "20397528223b6a5f4cbc2808aba0464e645544f9");
      TestRIPEMD160("RIPEMD160 is considered to be safe", "a7d78608c7af8a8e728778e81576870734122b66");
      TestRIPEMD160("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
                    "12a053384a9c0c88e405a06c27dcf49ada62eb2b");
      TestRIPEMD160("For this sample, this 63-byte string will be used as input data",
                    "de90dbfee14b63fb5abf27c2ad4a82aaa5f27a11");
      TestRIPEMD160("This is exactly 64 bytes long, not counting the terminating byte",
                    "eda31d51d3a623b81e19eb02e24ff65d27d67b37");
      TestRIPEMD160(std::string(1000000, 'a'), "52783243c1697bdbe16d37f97f68f08325dc1528");
      TestRIPEMD160(test1, "464243587bd146ea835cdf57bdae582f25ec45f1");
  }
  
  BOOST_AUTO_TEST_CASE(sha1_testvectors) {
      TestSHA1("", "da39a3ee5e6b4b0d3255bfef95601890afd80709");
      TestSHA1("abc", "a9993e364706816aba3e25717850c26c9cd0d89d");
      TestSHA1("message digest", "c12252ceda8be8994d5fa0290a47231c1d16aae3");
      TestSHA1("secure hash algorithm", "d4d6d2f0ebe317513bbd8d967d89bac5819c2f60");
      TestSHA1("SHA1 is considered to be safe", "f2b6650569ad3a8720348dd6ea6c497dee3a842a");
      TestSHA1("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
               "84983e441c3bd26ebaae4aa1f95129e5e54670f1");
      TestSHA1("For this sample, this 63-byte string will be used as input data",
               "4f0ea5cd0585a23d028abdc1a6684e5a8094dc49");
      TestSHA1("This is exactly 64 bytes long, not counting the terminating byte",
               "fb679f23e7d1ce053313e66e127ab1b444397057");
      TestSHA1(std::string(1000000, 'a'), "34aa973cd4c4daa4f61eeb2bdbad27316534016f");
      TestSHA1(test1, "b7755760681cbfd971451668f32af5774f4656b5");
  }
  
  BOOST_AUTO_TEST_CASE(sha256_testvectors) {
      TestSHA256("", "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855");
      TestSHA256("abc", "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad");
      TestSHA256("message digest",
                 "f7846f55cf23e14eebeab5b4e1550cad5b509e3348fbc4efa3a1413d393cb650");
      TestSHA256("secure hash algorithm",
                 "f30ceb2bb2829e79e4ca9753d35a8ecc00262d164cc077080295381cbd643f0d");
      TestSHA256("SHA256 is considered to be safe",
                 "6819d915c73f4d1e77e4e1b52d1fa0f9cf9beaead3939f15874bd988e2a23630");
      TestSHA256("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
                 "248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1");
      TestSHA256("For this sample, this 63-byte string will be used as input data",
                 "f08a78cbbaee082b052ae0708f32fa1e50c5c421aa772ba5dbb406a2ea6be342");
      TestSHA256("This is exactly 64 bytes long, not counting the terminating byte",
                 "ab64eff7e88e2e46165e29f2bce41826bd4c7b3552f6b382a9e7d3af47c245f8");
      TestSHA256("As Astral relies on 80 byte header hashes, we want to have an example for that.",
                 "4890d7540fe4604653a5108c012bb0d4ec15580dcfda37d85755830ec1037f26");
      TestSHA256(std::string(1000000, 'a'),
                 "cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0");
      TestSHA256(test1, "a316d55510b49662420f49d145d42fb83f31ef8dc016aa4e32df049991a91e26");
  }
  
  BOOST_AUTO_TEST_CASE(sha512_testvectors) {
      TestSHA512("",
                 "cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce"
                 "47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e");
      TestSHA512("abc",
                 "ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a"
                 "2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f");
      TestSHA512("message digest",
                 "107dbf389d9e9f71a3a95f6c055b9251bc5268c2be16d6c13492ea45b0199f33"
                 "09e16455ab1e96118e8a905d5597b72038ddb372a89826046de66687bb420e7c");
      TestSHA512("secure hash algorithm",
                 "7746d91f3de30c68cec0dd693120a7e8b04d8073cb699bdce1a3f64127bca7a3"
                 "d5db502e814bb63c063a7a5043b2df87c61133395f4ad1edca7fcf4b30c3236e");
      TestSHA512("SHA512 is considered to be safe",
                 "099e6468d889e1c79092a89ae925a9499b5408e01b66cb5b0a3bd0dfa51a9964"
                 "6b4a3901caab1318189f74cd8cf2e941829012f2449df52067d3dd5b978456c2");
      TestSHA512("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
                 "204a8fc6dda82f0a0ced7beb8e08a41657c16ef468b228a8279be331a703c335"
                 "96fd15c13b1b07f9aa1d3bea57789ca031ad85c7a71dd70354ec631238ca3445");
      TestSHA512("For this sample, this 63-byte string will be used as input data",
                 "b3de4afbc516d2478fe9b518d063bda6c8dd65fc38402dd81d1eb7364e72fb6e"
                 "6663cf6d2771c8f5a6da09601712fb3d2a36c6ffea3e28b0818b05b0a8660766");
      TestSHA512("This is exactly 64 bytes long, not counting the terminating byte",
                 "70aefeaa0e7ac4f8fe17532d7185a289bee3b428d950c14fa8b713ca09814a38"
                 "7d245870e007a80ad97c369d193e41701aa07f3221d15f0e65a1ff970cedf030");
      TestSHA512("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmno"
                 "ijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
                 "8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018"
                 "501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909");
      TestSHA512(std::string(1000000, 'a'),
                 "e718483d0ce769644e2e42c7bc15b4638e1f98b13b2044285632a803afa973eb"
                 "de0ff244877ea60a4cb0432ce577c31beb009c5c2c49aa2e4eadb217ad8cc09b");
      TestSHA512(test1,
                 "40cac46c147e6131c5193dd5f34e9d8bb4951395f27b08c558c65ff4ba2de594"
                 "37de8c3ef5459d76a52cedc02dc499a3c9ed9dedbfb3281afd9653b8a112fafc");
  }
  
  BOOST_AUTO_TEST_CASE(hmac_sha256_testvectors) {
      // test cases 1, 2, 3, 4, 6 and 7 of RFC 4231
      TestHMACSHA256("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b",
                     "4869205468657265",
                     "b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c2e32cff7");
      TestHMACSHA256("4a656665",
                     "7768617420646f2079612077616e7420666f72206e6f7468696e673f",
                     "5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b964ec3843");
      TestHMACSHA256("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
                     "dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd"
                     "dddddddddddddddddddddddddddddddddddd",
                     "773ea91e36800e46854db8ebd09181a72959098b3ef8c122d9635514ced565fe");
      TestHMACSHA256("0102030405060708090a0b0c0d0e0f10111213141516171819",
                     "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd"
                     "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd",
                     "82558a389a443c0ea4cc819899f2083a85f0faa3e578f8077a2e3ff46729665b");
      TestHMACSHA256("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaa",
                     "54657374205573696e67204c6172676572205468616e20426c6f636b2d53697a"
                     "65204b6579202d2048617368204b6579204669727374",
                     "60e431591ee0b67f0d8a26aacbf5b77f8e0bc6213728c5140546040f0ee37f54");
      TestHMACSHA256("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaa",
                     "5468697320697320612074657374207573696e672061206c6172676572207468"
                     "616e20626c6f636b2d73697a65206b657920616e642061206c61726765722074"
                     "68616e20626c6f636b2d73697a6520646174612e20546865206b6579206e6565"
                     "647320746f20626520686173686564206265666f7265206265696e6720757365"
                     "642062792074686520484d414320616c676f726974686d2e",
                     "9b09ffa71b942fcb27635fbcd5b0e944bfdc63644f0713938a7f51535c3a35e2");
  }
  
  BOOST_AUTO_TEST_CASE(hmac_sha512_testvectors) {
      // test cases 1, 2, 3, 4, 6 and 7 of RFC 4231
      TestHMACSHA512("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b",
                     "4869205468657265",
                     "87aa7cdea5ef619d4ff0b4241a1d6cb02379f4e2ce4ec2787ad0b30545e17cde"
                     "daa833b7d6b8a702038b274eaea3f4e4be9d914eeb61f1702e696c203a126854");
      TestHMACSHA512("4a656665",
                     "7768617420646f2079612077616e7420666f72206e6f7468696e673f",
                     "164b7a7bfcf819e2e395fbe73b56e0a387bd64222e831fd610270cd7ea250554"
                     "9758bf75c05a994a6d034f65f8f0e6fdcaeab1a34d4a6b4b636e070a38bce737");
      TestHMACSHA512("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
                     "dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd"
                     "dddddddddddddddddddddddddddddddddddd",
                     "fa73b0089d56a284efb0f0756c890be9b1b5dbdd8ee81a3655f83e33b2279d39"
                     "bf3e848279a722c806b485a47e67c807b946a337bee8942674278859e13292fb");
      TestHMACSHA512("0102030405060708090a0b0c0d0e0f10111213141516171819",
                     "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd"
                     "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd",
                     "b0ba465637458c6990e5a8c5f61d4af7e576d97ff94b872de76f8050361ee3db"
                     "a91ca5c11aa25eb4d679275cc5788063a5f19741120c4f2de2adebeb10a298dd");
      TestHMACSHA512("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaa",
                     "54657374205573696e67204c6172676572205468616e20426c6f636b2d53697a"
                     "65204b6579202d2048617368204b6579204669727374",
                     "80b24263c7c1a3ebb71493c1dd7be8b49b46d1f41b4aeec1121b013783f8f352"
                     "6b56d037e05f2598bd0fd2215d6a1e5295e64f73f63f0aec8b915a985d786598");
      TestHMACSHA512("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                     "aaaaaa",
                     "5468697320697320612074657374207573696e672061206c6172676572207468"
                     "616e20626c6f636b2d73697a65206b657920616e642061206c61726765722074"
                     "68616e20626c6f636b2d73697a6520646174612e20546865206b6579206e6565"
                     "647320746f20626520686173686564206265666f7265206265696e6720757365"
                     "642062792074686520484d414320616c676f726974686d2e",
                     "e37b6a775dc87dbaa4dfa9f96e5e3ffddebd71f8867289865df5a32d20cdc944"
                     "b6022cac3c4982b10d5eeb55c3e4de15134676fb6de0446065c97440fa8c6a58");
  }
  
  BOOST_AUTO_TEST_CASE(aes_testvectors) {
      // AES test vectors from FIPS 197.
      TestAES128("000102030405060708090a0b0c0d0e0f", "00112233445566778899aabbccddeeff", "69c4e0d86a7b0430d8cdb78070b4c55a");
      TestAES256("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f", "00112233445566778899aabbccddeeff", "8ea2b7ca516745bfeafc49904b496089");
  
      // AES-ECB test vectors from NIST sp800-38a.
      TestAES128("2b7e151628aed2a6abf7158809cf4f3c", "6bc1bee22e409f96e93d7e117393172a", "3ad77bb40d7a3660a89ecaf32466ef97");
      TestAES128("2b7e151628aed2a6abf7158809cf4f3c", "ae2d8a571e03ac9c9eb76fac45af8e51", "f5d3d58503b9699de785895a96fdbaaf");
      TestAES128("2b7e151628aed2a6abf7158809cf4f3c", "30c81c46a35ce411e5fbc1191a0a52ef", "43b1cd7f598ece23881b00e3ed030688");
      TestAES128("2b7e151628aed2a6abf7158809cf4f3c", "f69f2445df4f9b17ad2b417be66c3710", "7b0c785e27e8ad3f8223207104725dd4");
      TestAES256("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4", "6bc1bee22e409f96e93d7e117393172a", "f3eed1bdb5d2a03c064b5a7e3db181f8");
      TestAES256("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4", "ae2d8a571e03ac9c9eb76fac45af8e51", "591ccb10d410ed26dc5ba74a31362870");
      TestAES256("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4", "30c81c46a35ce411e5fbc1191a0a52ef", "b6ed21b99ca6f4f9f153e7b1beafed1d");
      TestAES256("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4", "f69f2445df4f9b17ad2b417be66c3710", "23304b7a39f9f3ff067d8d8f9e24ecc7");
  }
  
  BOOST_AUTO_TEST_CASE(aes_cbc_testvectors) {
  
      // NIST AES CBC 128-bit encryption test-vectors
      TestAES128CBC("2b7e151628aed2a6abf7158809cf4f3c", "000102030405060708090A0B0C0D0E0F", false, \
                    "6bc1bee22e409f96e93d7e117393172a", "7649abac8119b246cee98e9b12e9197d");
      TestAES128CBC("2b7e151628aed2a6abf7158809cf4f3c", "7649ABAC8119B246CEE98E9B12E9197D", false, \
                    "ae2d8a571e03ac9c9eb76fac45af8e51", "5086cb9b507219ee95db113a917678b2");
      TestAES128CBC("2b7e151628aed2a6abf7158809cf4f3c", "5086cb9b507219ee95db113a917678b2", false, \
                    "30c81c46a35ce411e5fbc1191a0a52ef", "73bed6b8e3c1743b7116e69e22229516");
      TestAES128CBC("2b7e151628aed2a6abf7158809cf4f3c", "73bed6b8e3c1743b7116e69e22229516", false, \
                    "f69f2445df4f9b17ad2b417be66c3710", "3ff1caa1681fac09120eca307586e1a7");
  
      // The same vectors with padding enabled
      TestAES128CBC("2b7e151628aed2a6abf7158809cf4f3c", "000102030405060708090A0B0C0D0E0F", true, \
                    "6bc1bee22e409f96e93d7e117393172a", "7649abac8119b246cee98e9b12e9197d8964e0b149c10b7b682e6e39aaeb731c");
      TestAES128CBC("2b7e151628aed2a6abf7158809cf4f3c", "7649ABAC8119B246CEE98E9B12E9197D", true, \
                    "ae2d8a571e03ac9c9eb76fac45af8e51", "5086cb9b507219ee95db113a917678b255e21d7100b988ffec32feeafaf23538");
      TestAES128CBC("2b7e151628aed2a6abf7158809cf4f3c", "5086cb9b507219ee95db113a917678b2", true, \
                    "30c81c46a35ce411e5fbc1191a0a52ef", "73bed6b8e3c1743b7116e69e22229516f6eccda327bf8e5ec43718b0039adceb");
      TestAES128CBC("2b7e151628aed2a6abf7158809cf4f3c", "73bed6b8e3c1743b7116e69e22229516", true, \
                    "f69f2445df4f9b17ad2b417be66c3710", "3ff1caa1681fac09120eca307586e1a78cb82807230e1321d3fae00d18cc2012");
  
      // NIST AES CBC 256-bit encryption test-vectors
      TestAES256CBC("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4", \
                    "000102030405060708090A0B0C0D0E0F", false, "6bc1bee22e409f96e93d7e117393172a", \
                    "f58c4c04d6e5f1ba779eabfb5f7bfbd6");
      TestAES256CBC("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4", \
                    "F58C4C04D6E5F1BA779EABFB5F7BFBD6", false, "ae2d8a571e03ac9c9eb76fac45af8e51", \
                    "9cfc4e967edb808d679f777bc6702c7d");
      TestAES256CBC("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4", \
                    "9CFC4E967EDB808D679F777BC6702C7D", false, "30c81c46a35ce411e5fbc1191a0a52ef",
                    "39f23369a9d9bacfa530e26304231461");
      TestAES256CBC("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4", \
                    "39F23369A9D9BACFA530E26304231461", false, "f69f2445df4f9b17ad2b417be66c3710", \
                    "b2eb05e2c39be9fcda6c19078c6a9d1b");
  
      // The same vectors with padding enabled
      TestAES256CBC("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4", \
                    "000102030405060708090A0B0C0D0E0F", true, "6bc1bee22e409f96e93d7e117393172a", \
                    "f58c4c04d6e5f1ba779eabfb5f7bfbd6485a5c81519cf378fa36d42b8547edc0");
      TestAES256CBC("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4", \
                    "F58C4C04D6E5F1BA779EABFB5F7BFBD6", true, "ae2d8a571e03ac9c9eb76fac45af8e51", \
                    "9cfc4e967edb808d679f777bc6702c7d3a3aa5e0213db1a9901f9036cf5102d2");
      TestAES256CBC("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4", \
                    "9CFC4E967EDB808D679F777BC6702C7D", true, "30c81c46a35ce411e5fbc1191a0a52ef",
                    "39f23369a9d9bacfa530e263042314612f8da707643c90a6f732b3de1d3f5cee");
      TestAES256CBC("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4", \
                    "39F23369A9D9BACFA530E26304231461", true, "f69f2445df4f9b17ad2b417be66c3710", \
                    "b2eb05e2c39be9fcda6c19078c6a9d1b3f461796d6b0d6b2e0c2a72b4d80e644");
  }
  
  
  BOOST_AUTO_TEST_CASE(chacha20_testvector)
  {
      // Test vector from RFC 7539
      TestChaCha20("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f", 0x4a000000UL, 1,
                   "224f51f3401bd9e12fde276fb8631ded8c131f823d2c06e27e4fcaec9ef3cf788a3b0aa372600a92b57974cded2b9334794cb"
                   "a40c63e34cdea212c4cf07d41b769a6749f3f630f4122cafe28ec4dc47e26d4346d70b98c73f3e9c53ac40c5945398b6eda1a"
                   "832c89c167eacd901d7e2bf363");
  
      // Test vectors from https://tools.ietf.org/html/draft-agl-tls-chacha20poly1305-04#section-7
      TestChaCha20("0000000000000000000000000000000000000000000000000000000000000000", 0, 0,
                   "76b8e0ada0f13d90405d6ae55386bd28bdd219b8a08ded1aa836efcc8b770dc7da41597c5157488d7724e03fb8d84a376a43b"
                   "8f41518a11cc387b669b2ee6586");
      TestChaCha20("0000000000000000000000000000000000000000000000000000000000000001", 0, 0,
                   "4540f05a9f1fb296d7736e7b208e3c96eb4fe1834688d2604f450952ed432d41bbe2a0b6ea7566d2a5d1e7e20d42af2c53d79"
                   "2b1c43fea817e9ad275ae546963");
      TestChaCha20("0000000000000000000000000000000000000000000000000000000000000000", 0x0100000000000000ULL, 0,
                   "de9cba7bf3d69ef5e786dc63973f653a0b49e015adbff7134fcb7df137821031e85a050278a7084527214f73efc7fa5b52770"
                   "62eb7a0433e445f41e3");
      TestChaCha20("0000000000000000000000000000000000000000000000000000000000000000", 1, 0,
                   "ef3fdfd6c61578fbf5cf35bd3dd33b8009631634d21e42ac33960bd138e50d32111e4caf237ee53ca8ad6426194a88545ddc4"
                   "97a0b466e7d6bbdb0041b2f586b");
      TestChaCha20("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f", 0x0706050403020100ULL, 0,
                   "f798a189f195e66982105ffb640bb7757f579da31602fc93ec01ac56f85ac3c134a4547b733b46413042c9440049176905d3b"
                   "e59ea1c53f15916155c2be8241a38008b9a26bc35941e2444177c8ade6689de95264986d95889fb60e84629c9bd9a5acb1cc1"
                   "18be563eb9b3a4a472f82e09a7e778492b562ef7130e88dfe031c79db9d4f7c7a899151b9a475032b63fc385245fe054e3dd5"
                   "a97a5f576fe064025d3ce042c566ab2c507b138db853e3d6959660996546cc9c4a6eafdc777c040d70eaf46f76dad3979e5c5"
                   "360c3317166a1c894c94a371876a94df7628fe4eaaf2ccb27d5aaae0ad7ad0f9d4b6ad3b54098746d4524d38407a6deb3ab78"
                   "fab78c9");
  }
  
  BOOST_AUTO_TEST_CASE(countbits_tests)
  {
      FastRandomContext ctx;
      for (int i = 0; i <= 64; ++i) {
          if (i == 0) {
              // Check handling of zero.
              BOOST_CHECK_EQUAL(CountBits(0), 0);
          } else if (i < 10) {
              for (uint64_t j = 1 << (i - 1); (j >> i) == 0; ++j) {
                  // Exhaustively test up to 10 bits
                  BOOST_CHECK_EQUAL(CountBits(j), i);
              }
          } else {
              for (int k = 0; k < 1000; k++) {
                  // Randomly test 1000 samples of each length above 10 bits.
                  uint64_t j = ((uint64_t)1) << (i - 1) | ctx.randbits(i - 1);
                  BOOST_CHECK_EQUAL(CountBits(j), i);
              }
          }
      }
  }
  
  BOOST_AUTO_TEST_SUITE_END()
  