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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "gtest/gtest.h"
#include <algorithm>
#include <stdint.h>
#include <vector>

#include "../ClearKeyBase64.cpp"

using namespace std;

struct B64Test {
  string b64;
  vector<uint8_t> raw;
  bool shouldPass;
};

const B64Test tests[] = {
  {
    "AAAAADk4AU4AAAAAAAAAAA",
    { 0x0, 0x0, 0x0, 0x0, 0x39, 0x38, 0x1, 0x4e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
    true
  },
  {
    "h2mqp1zAJjDIC34YXEXBxA==",
    { 0x87, 0x69, 0xaa, 0xa7, 0x5c, 0xc0, 0x26, 0x30, 0xc8, 0xb, 0x7e, 0x18, 0x5c, 0x45, 0xc1, 0xc4 },
    true
  },
  {
    "flcdA35XHQN-Vx0DflcdAw",
    { 0x7e, 0x57, 0x1d, 0x3, 0x7e, 0x57, 0x1d, 0x3, 0x7e, 0x57, 0x1d, 0x3, 0x7e, 0x57, 0x1d, 0x3 },
    true
  },
  {
    "flczM35XMzN-VzMzflczMw",
    { 0x7e, 0x57, 0x33, 0x33, 0x7e, 0x57, 0x33, 0x33, 0x7e, 0x57, 0x33, 0x33, 0x7e, 0x57, 0x33, 0x33 },
    true,
  },
  {
    "flcdBH5XHQR-Vx0EflcdBA",
    { 0x7e, 0x57, 0x1d, 0x4, 0x7e, 0x57, 0x1d, 0x4, 0x7e, 0x57, 0x1d, 0x4, 0x7e, 0x57, 0x1d, 0x4 },
    true
  },
  {
    "fldERH5XRER-V0REfldERA",
    { 0x7e, 0x57, 0x44, 0x44, 0x7e, 0x57, 0x44, 0x44, 0x7e, 0x57, 0x44, 0x44, 0x7e, 0x57, 0x44, 0x44 },
    true
  },
  {
    "fuzzbiz=",
    { 0x7e, 0xec, 0xf3, 0x6e, 0x2c },
    true
  },
  {
    "fuzzbizfuzzbizfuzzbizfuzzbizfuzzbizfuzzbizfuzzbizfuzzbiz",
    {
      0x7e, 0xec, 0xf3, 0x6e, 0x2c, 0xdf, 0xbb, 0x3c, 0xdb, 0x8b,
      0x37, 0xee, 0xcf, 0x36, 0xe2, 0xcd, 0xfb, 0xb3, 0xcd, 0xb8,
      0xb3, 0x7e, 0xec, 0xf3, 0x6e, 0x2c, 0xdf, 0xbb, 0x3c, 0xdb,
      0x8b, 0x37, 0xee, 0xcf, 0x36, 0xe2, 0xcd, 0xfb, 0xb3, 0xcd,
      0xb8, 0xb3
    },
    true
  },
  { "", { }, true },
  { "00", { 0xd3 }, true },
  { "000", { 0xd3, 0x4d }, true },

  { "invalid", { 0x8a, 0x7b, 0xda, 0x96, 0x27 }, true },
  { "invalic", { 0x8a, 0x7b, 0xda, 0x96, 0x27 }, true },

  // Failure tests
  { "A", { }, false }, // 1 character is too few.
  { "_", { }, false }, // 1 character is too few.
};

TEST(ClearKey, DecodeBase64) {
  for (const B64Test& test : tests) {
    vector<uint8_t> v;
    bool rv = DecodeBase64(string(test.b64), v);
    EXPECT_EQ(test.shouldPass, rv);
    if (test.shouldPass) {
      EXPECT_EQ(test.raw.size(), v.size());
      for (size_t k = 0; k < test.raw.size(); k++) {
        EXPECT_EQ(test.raw[k], v[k]);
      }
    }
  }
}