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/***
* Copyright (C) Microsoft. All rights reserved.
* Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
*
* =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
*
* base64.cpp
*
* Tests for base64-related utility functions and classes.
*
* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
****/
#include "stdafx.h"
using namespace utility;
namespace tests
{
namespace functional
{
namespace utils_tests
{
SUITE(base64)
{
// Note: base64 works by encoding any 3 bytes as a four-byte string. Each triple is encoded independently of
// previous and subsequent triples. If, for a given set of input bytes, the number is not an even multiple of 3,
// the remaining 1 or two bytes are encoded and padded using '=' characters at the end. The encoding format is
// defined by IETF RFC 4648. Such padding is only allowed at the end of a encoded string, which makes it impossible
// to generally concatenate encoded strings and wind up with a string that is a valid base64 encoding.
//
// Since each triple of bytes is independent of others, we don't have to test particularly large sets if input data,
// validating that the algorithm can process at least two triples should be sufficient.
//
TEST(rfc_4648_tests_encode)
{
// These tests are what base64 RFC 4648 proposes.
{
std::vector<unsigned char> str1;
VERIFY_ARE_EQUAL(string_t(_XPLATSTR("")), utility::conversions::to_base64(str1));
}
{
std::vector<unsigned char> str1;
str1.push_back('f');
VERIFY_ARE_EQUAL(string_t(_XPLATSTR("Zg==")), utility::conversions::to_base64(str1));
}
{
std::vector<unsigned char> str1;
str1.push_back('f');
str1.push_back('o');
VERIFY_ARE_EQUAL(string_t(_XPLATSTR("Zm8=")), utility::conversions::to_base64(str1));
}
{
std::vector<unsigned char> str1;
str1.push_back('f');
str1.push_back('o');
str1.push_back('o');
VERIFY_ARE_EQUAL(string_t(_XPLATSTR("Zm9v")), utility::conversions::to_base64(str1));
}
{
std::vector<unsigned char> str1;
str1.push_back('f');
str1.push_back('o');
str1.push_back('o');
str1.push_back('b');
VERIFY_ARE_EQUAL(string_t(_XPLATSTR("Zm9vYg==")), utility::conversions::to_base64(str1));
}
{
std::vector<unsigned char> str1;
str1.push_back('f');
str1.push_back('o');
str1.push_back('o');
str1.push_back('b');
str1.push_back('a');
VERIFY_ARE_EQUAL(string_t(_XPLATSTR("Zm9vYmE=")), utility::conversions::to_base64(str1));
}
{
std::vector<unsigned char> str1;
str1.push_back('f');
str1.push_back('o');
str1.push_back('o');
str1.push_back('b');
str1.push_back('a');
str1.push_back('r');
VERIFY_ARE_EQUAL(string_t(_XPLATSTR("Zm9vYmFy")), utility::conversions::to_base64(str1));
}
}
TEST(rfc_4648_tests_decode)
{
// These tests are what base64 RFC 4648 proposes.
{
std::vector<unsigned char> str1 = utility::conversions::from_base64(_XPLATSTR(""));
VERIFY_ARE_EQUAL(0u, str1.size());
}
{
std::vector<unsigned char> str1 = utility::conversions::from_base64(_XPLATSTR("Zg=="));
VERIFY_ARE_EQUAL(1u, str1.size());
VERIFY_ARE_EQUAL('f', str1[0]);
}
{
std::vector<unsigned char> str1 = utility::conversions::from_base64(_XPLATSTR("Zm8="));
VERIFY_ARE_EQUAL(2u, str1.size());
VERIFY_ARE_EQUAL('f', str1[0]);
VERIFY_ARE_EQUAL('o', str1[1]);
}
{
std::vector<unsigned char> str1 = utility::conversions::from_base64(_XPLATSTR("Zm9v"));
VERIFY_ARE_EQUAL(3u, str1.size());
VERIFY_ARE_EQUAL('f', str1[0]);
VERIFY_ARE_EQUAL('o', str1[1]);
VERIFY_ARE_EQUAL('o', str1[2]);
}
{
std::vector<unsigned char> str1 = utility::conversions::from_base64(_XPLATSTR("Zm9vYg=="));
VERIFY_ARE_EQUAL(4u, str1.size());
VERIFY_ARE_EQUAL('f', str1[0]);
VERIFY_ARE_EQUAL('o', str1[1]);
VERIFY_ARE_EQUAL('o', str1[2]);
VERIFY_ARE_EQUAL('b', str1[3]);
}
{
std::vector<unsigned char> str1 = utility::conversions::from_base64(_XPLATSTR("Zm9vYmE="));
VERIFY_ARE_EQUAL(5u, str1.size());
VERIFY_ARE_EQUAL('f', str1[0]);
VERIFY_ARE_EQUAL('o', str1[1]);
VERIFY_ARE_EQUAL('o', str1[2]);
VERIFY_ARE_EQUAL('b', str1[3]);
VERIFY_ARE_EQUAL('a', str1[4]);
}
{
std::vector<unsigned char> str1 = utility::conversions::from_base64(_XPLATSTR("Zm9vYmFy"));
VERIFY_ARE_EQUAL(6u, str1.size());
VERIFY_ARE_EQUAL('f', str1[0]);
VERIFY_ARE_EQUAL('o', str1[1]);
VERIFY_ARE_EQUAL('o', str1[2]);
VERIFY_ARE_EQUAL('b', str1[3]);
VERIFY_ARE_EQUAL('a', str1[4]);
VERIFY_ARE_EQUAL('r', str1[5]);
}
}
TEST(additional_encode)
{
{
// Check '/' encoding
std::vector<unsigned char> str1;
str1.push_back(254);
VERIFY_ARE_EQUAL(string_t(_XPLATSTR("/g==")), utility::conversions::to_base64(str1));
}
{
// Check '+' encoding
std::vector<unsigned char> str1;
str1.push_back(250);
VERIFY_ARE_EQUAL(string_t(_XPLATSTR("+g==")), utility::conversions::to_base64(str1));
}
{
std::vector<unsigned char> str1;
str1.push_back('f');
str1.push_back('o');
str1.push_back(239);
str1.push_back('b');
VERIFY_ARE_EQUAL(string_t(_XPLATSTR("Zm/vYg==")), utility::conversions::to_base64(str1));
}
{
std::vector<unsigned char> str1;
str1.push_back('g');
str1.push_back(239);
str1.push_back('o');
str1.push_back('b');
VERIFY_ARE_EQUAL(string_t(_XPLATSTR("Z+9vYg==")), utility::conversions::to_base64(str1));
}
}
TEST(additional_decode)
{
// Tests beyond what the RFC recommends.
{
// Check '/' decoding
std::vector<unsigned char> str1 = utility::conversions::from_base64(_XPLATSTR("/g=="));
VERIFY_ARE_EQUAL(1u, str1.size());
VERIFY_ARE_EQUAL(254u, str1[0]);
}
{
// Check '+' decoding
std::vector<unsigned char> str1 = utility::conversions::from_base64(_XPLATSTR("+g=="));
VERIFY_ARE_EQUAL(1u, str1.size());
VERIFY_ARE_EQUAL(250u, str1[0]);
}
{
// Check '/' decoding
std::vector<unsigned char> str1 = utility::conversions::from_base64(_XPLATSTR("Zm/vYg=="));
VERIFY_ARE_EQUAL(4u, str1.size());
VERIFY_ARE_EQUAL('f', str1[0]);
VERIFY_ARE_EQUAL('o', str1[1]);
VERIFY_ARE_EQUAL(239, str1[2]);
VERIFY_ARE_EQUAL('b', str1[3]);
}
{
// Check '+' decoding
std::vector<unsigned char> str1 = utility::conversions::from_base64(_XPLATSTR("Z+9vYg=="));
VERIFY_ARE_EQUAL(4u, str1.size());
VERIFY_ARE_EQUAL('g', str1[0]);
VERIFY_ARE_EQUAL(239, str1[1]);
VERIFY_ARE_EQUAL('o', str1[2]);
VERIFY_ARE_EQUAL('b', str1[3]);
}
{
// Check the whole base64 alphabet
std::vector<unsigned char> str1 = utility::conversions::from_base64(
_XPLATSTR("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"));
VERIFY_ARE_EQUAL(48u, str1.size());
}
}
TEST(bad_decode)
{
// These tests are for input that should be disallowed by a very strict decoder, but
// the available APIs on Windows accept them, as does glib, which is used on Linux.
// Invalid character before padding, unused ones.
VERIFY_THROWS(utility::conversions::from_base64(_XPLATSTR("/q==")), std::runtime_error);
VERIFY_THROWS(utility::conversions::from_base64(_XPLATSTR("Zm9vYmD=")), std::runtime_error);
// CRLF in the middle.
VERIFY_THROWS(utility::conversions::from_base64(
_XPLATSTR("ABCDEFGHIJKLMNOPQRSTUVWXYZ\r\nabcdefghijklmnopqrstuvwxyz\r\n0123456789+/")),
std::runtime_error);
// Not the right length.
VERIFY_THROWS(utility::conversions::from_base64(_XPLATSTR("/q")), std::runtime_error);
// Characters not in the alphabet
VERIFY_THROWS(utility::conversions::from_base64(_XPLATSTR("$%#@")), std::runtime_error);
// Too much padding at the end.
VERIFY_THROWS(utility::conversions::from_base64(_XPLATSTR("/q=========")), std::runtime_error);
// Valid strings, concatenated
VERIFY_THROWS(utility::conversions::from_base64(_XPLATSTR("Z+9vYg==Z+9vYg==")), std::runtime_error);
}
TEST(large_string)
{
const size_t size = 64 * 1024;
std::vector<unsigned char> data(size);
for (auto i = 0u; i < size; ++i)
{
data[i] = (unsigned char)(rand() & 0xFF);
}
auto string = utility::conversions::to_base64(data);
auto data2 = utility::conversions::from_base64(string);
VERIFY_ARE_EQUAL(data, data2);
}
} // SUITE(base64)
} // namespace utils_tests
} // namespace functional
} // namespace tests
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