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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/base32/base32.h"
#include <stddef.h>
#include <stdint.h>
#include <algorithm>
#include <limits>
#include <string>
#include <vector>
#include "base/check.h"
#include "base/containers/span.h"
base32::Base32EncodePolicy GetBase32EncodePolicyFromUint8(uint8_t value) {
// Dummy switch to detect changes to the enum definition.
switch (base32::Base32EncodePolicy()) {
case base32::Base32EncodePolicy::INCLUDE_PADDING:
case base32::Base32EncodePolicy::OMIT_PADDING:
break;
}
return (value % 2) == 0 ? base32::Base32EncodePolicy::INCLUDE_PADDING
: base32::Base32EncodePolicy::OMIT_PADDING;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
if (size < 2 || size > std::numeric_limits<size_t>::max() / 5)
return 0;
const base32::Base32EncodePolicy encode_policy =
GetBase32EncodePolicyFromUint8(data[0]);
// SAFETY: libfuzzer guarantees that there are size bytes available at data.
UNSAFE_BUFFERS(
const base::span<const uint8_t> input_bytes(data + 1, size - 1));
std::string encoded_string = base32::Base32Encode(input_bytes, encode_policy);
std::vector<uint8_t> decoded_bytes = base32::Base32Decode(encoded_string);
CHECK(std::ranges::equal(input_bytes, decoded_bytes));
return 0;
}
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