/* Copyright 2015 The BoringSSL Authors
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */

#ifndef OPENSSL_HEADER_CRYPTO_TEST_TEST_UTIL_H
#define OPENSSL_HEADER_CRYPTO_TEST_TEST_UTIL_H

#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

#include <iosfwd>
#include <string_view>
#include <vector>

#include <gtest/gtest.h>

#include <openssl/span.h>

#include "../internal.h"


// hexdump writes |msg| to |fp| followed by the hex encoding of |len| bytes
// from |in|.
void hexdump(FILE *fp, const char *msg, const void *in, size_t len);

// Bytes is a wrapper over a byte slice which may be compared for equality. This
// allows it to be used in EXPECT_EQ macros.
struct Bytes {
  Bytes(const uint8_t *data_arg, size_t len_arg)
      : span_(data_arg, len_arg) {}
  Bytes(const char *data_arg, size_t len_arg)
      : span_(reinterpret_cast<const uint8_t *>(data_arg), len_arg) {}

  explicit Bytes(std::string_view str) : span_(bssl::StringAsBytes(str)) {}
  explicit Bytes(bssl::Span<const uint8_t> span) : span_(span) {}

  bssl::Span<const uint8_t> span_;
};

inline bool operator==(const Bytes &a, const Bytes &b) {
  return a.span_ == b.span_;
}

inline bool operator!=(const Bytes &a, const Bytes &b) { return !(a == b); }

// Declassified returns a declassified copy of some input.
inline std::vector<uint8_t> Declassified(bssl::Span<const uint8_t> in) {
  std::vector<uint8_t> copy(in.begin(), in.end());
  CONSTTIME_DECLASSIFY(copy.data(), copy.size());
  return copy;
}

std::ostream &operator<<(std::ostream &os, const Bytes &in);

// DecodeHex decodes |in| from hexadecimal and writes the output to |out|. It
// returns true on success and false if |in| is not a valid hexadecimal byte
// string.
bool DecodeHex(std::vector<uint8_t> *out, const std::string &in);

// EncodeHex returns |in| encoded in hexadecimal.
std::string EncodeHex(bssl::Span<const uint8_t> in);

// ErrorEquals asserts that |err| is an error with library |lib| and reason
// |reason|.
testing::AssertionResult ErrorEquals(uint32_t err, int lib, int reason);


#endif  // OPENSSL_HEADER_CRYPTO_TEST_TEST_UTIL_H