54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
|
// Copyright 2022 Google LLC. All rights reserved.
|
||
|
|
//
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file or at
|
||
|
|
// https://developers.google.com/open-source/licenses/bsd
|
||
|
|
|
||
|
|
#include <packager/utils/hex_parser.h>
|
||
|
|
|
||
|
|
#include <absl/strings/escaping.h>
|
||
|
|
#include <absl/types/span.h>
|
||
|
|
|
||
|
|
namespace shaka {
|
||
|
|
|
||
|
|
void HexStringToBytes(const std::string& hex, std::vector<uint8_t>* bytes) {
|
||
|
|
std::string raw = absl::HexStringToBytes(hex);
|
||
|
|
|
||
|
|
absl::string_view str_view(raw);
|
||
|
|
absl::Span<const uint8_t> span(
|
||
|
|
reinterpret_cast<const uint8_t*>(str_view.data()), str_view.size());
|
||
|
|
*bytes = std::vector<uint8_t>(span.begin(), span.end());
|
||
|
|
}
|
||
|
|
|
||
|
|
bool ValidHexStringToBytes(const std::string& hex,
|
||
|
|
std::vector<uint8_t>* bytes) {
|
||
|
|
std::string raw;
|
||
|
|
if (!ValidHexStringToBytes(hex, &raw))
|
||
|
|
return false;
|
||
|
|
|
||
|
|
absl::string_view str_view(raw);
|
||
|
|
absl::Span<const uint8_t> span(
|
||
|
|
reinterpret_cast<const uint8_t*>(str_view.data()), str_view.size());
|
||
|
|
*bytes = std::vector<uint8_t>(span.begin(), span.end());
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool ValidHexStringToBytes(const std::string& hex, std::string* bytes) {
|
||
|
|
// absl::HexStringToBytes will not validate the string! Any invalid byte
|
||
|
|
// sequence will be converted into NUL characters silently. So we do our own
|
||
|
|
// validation here.
|
||
|
|
for (char c : hex) {
|
||
|
|
c = static_cast<char>(std::tolower(c));
|
||
|
|
if ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f')) {
|
||
|
|
// valid
|
||
|
|
} else {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
*bytes = absl::HexStringToBytes(hex);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace shaka
|