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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <fuzzer/FuzzedDataProvider.h>
#include <stdint.h>
#include <string>
#include <tuple>
#include "base/base64url.h"
#include "base/check.h"
#include "base/check_op.h"
namespace base {
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
FuzzedDataProvider provider(data, size);
// Test encoding of a random plaintext.
std::string plaintext = provider.ConsumeRandomLengthString();
Base64UrlEncodePolicy encode_policy =
provider.ConsumeBool() ? Base64UrlEncodePolicy::INCLUDE_PADDING
: Base64UrlEncodePolicy::OMIT_PADDING;
std::string encoded;
Base64UrlEncode(plaintext, encode_policy, &encoded);
// Check decoding of the above gives the original text.
std::string decoded;
CHECK(Base64UrlDecode(encoded,
encode_policy == Base64UrlEncodePolicy::INCLUDE_PADDING
? Base64UrlDecodePolicy::REQUIRE_PADDING
: Base64UrlDecodePolicy::DISALLOW_PADDING,
&decoded));
CHECK_EQ(decoded, plaintext);
// Same result should be when ignoring padding.
decoded.clear();
CHECK(Base64UrlDecode(encoded, Base64UrlDecodePolicy::IGNORE_PADDING,
&decoded));
CHECK_EQ(decoded, plaintext);
// Additionally test decoding of a random input.
std::string decoding_input = provider.ConsumeRandomLengthString();
Base64UrlDecodePolicy decode_policy;
switch (provider.ConsumeIntegralInRange<int>(0, 2)) {
case 0:
decode_policy = Base64UrlDecodePolicy::REQUIRE_PADDING;
break;
case 1:
decode_policy = Base64UrlDecodePolicy::IGNORE_PADDING;
break;
case 2:
decode_policy = Base64UrlDecodePolicy::DISALLOW_PADDING;
break;
}
std::ignore = Base64UrlDecode(decoding_input, decode_policy, &decoded);
return 0;
}
} // namespace base
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