31 lines
834 B
C++
31 lines
834 B
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"
|
||
|
|
|
||
|
|
namespace shaka {
|
||
|
|
|
||
|
|
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
|