41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
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#include "psid_ssp.hpp"
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#include <boost/algorithm/hex.hpp>
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#include <charconv>
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namespace vanetza
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{
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namespace pki
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{
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bool lexical_cast(const std::string& input, PsidSsp& permission)
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{
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// split into the decimal PSID and the optional ':'-separated hex SSP.
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const std::size_t colon = input.find(':');
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const char* first = input.data();
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const char* last = input.data() + (colon == std::string::npos ? input.size() : colon);
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decltype(permission.psid) psid = 0;
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auto [ptr, ec] = std::from_chars(first, last, psid);
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if (ec != std::errc {} || ptr != last) {
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// empty, contains a non-digit, or out of range
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return false;
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}
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// found SSP part
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if (colon != std::string::npos) {
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try {
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ByteBuffer ssp;
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boost::algorithm::unhex(input.begin() + colon + 1, input.end(), std::back_inserter(ssp));
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permission.ssp = std::move(ssp);
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} catch (boost::algorithm::hex_decode_error&) {
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return false;
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}
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}
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permission.psid = psid;
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return true;
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}
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} // namespace pki
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} // namespace vanetza
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