73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
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#ifndef FA909143_0CE7_4397_A42B_5CDA56AB4716
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#define FA909143_0CE7_4397_A42B_5CDA56AB4716
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#include <vanetza/security/ecc_point.hpp>
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#include <vanetza/security/signature.hpp>
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#include <cassert>
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namespace vanetza
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{
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namespace security
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{
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EcdsaSignatureFuture::EcdsaSignatureFuture(std::shared_future<EcdsaSignature> future,
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EcdsaSignature placeholder) :
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m_future(future), m_placeholder(std::move(placeholder))
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{
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if (!m_future.valid()) {
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throw std::invalid_argument("EcdsaSignature future has to be valid");
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}
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}
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const EcdsaSignature& EcdsaSignatureFuture::get() const
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{
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assert(m_future.valid());
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const EcdsaSignature& signature = m_future.get();
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assert(signature.s.size() == m_placeholder.s.size());
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assert(signature.R.which() == m_placeholder.R.which());
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assert(get_length(signature.R) == get_length(m_placeholder.R));
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return signature;
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}
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std::size_t EcdsaSignatureFuture::size() const
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{
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return get_length(m_placeholder.R) + m_placeholder.s.size();
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}
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ByteBuffer extract_signature_buffer(const SomeEcdsaSignature& sig)
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{
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struct extraction_visitor : public boost::static_visitor<>
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{
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void operator()(const EcdsaSignature& sig)
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{
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m_buffer = convert_for_signing(sig.R);
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m_buffer.insert(m_buffer.end(), sig.s.begin(), sig.s.end());
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}
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void operator()(const EcdsaSignatureFuture& sig_future)
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{
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const EcdsaSignature& sig = sig_future.get();
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(*this)(sig);
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}
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ByteBuffer m_buffer;
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};
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extraction_visitor visitor;
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boost::apply_visitor(visitor, sig);
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return visitor.m_buffer;
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}
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ByteBuffer extract_signature_buffer(const Signature& sig)
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{
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ByteBuffer buffer = sig.r;
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buffer.insert(buffer.end(), sig.s.begin(), sig.s.end());
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return buffer;
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}
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} // namespace security
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} // namespace vanetza
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#endif /* FA909143_0CE7_4397_A42B_5CDA56AB4716 */
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