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64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
#include "json_binary_proxy.hpp"
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#include <oxenc/hex.h>
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#include <oxenc/base64.h>
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namespace llarp::rpc
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{
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void
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load_binary_parameter_impl(
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std::string_view bytes, size_t raw_size, bool allow_raw, uint8_t* val_data)
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{
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if (allow_raw && bytes.size() == raw_size)
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{
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std::memcpy(val_data, bytes.data(), bytes.size());
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return;
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}
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else if (bytes.size() == raw_size * 2)
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{
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if (oxenc::is_hex(bytes))
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{
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oxenc::from_hex(bytes.begin(), bytes.end(), val_data);
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return;
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}
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}
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else
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{
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const size_t b64_padded = (raw_size + 2) / 3 * 4;
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const size_t b64_padding = raw_size % 3 == 1 ? 2 : raw_size % 3 == 2 ? 1 : 0;
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const size_t b64_unpadded = b64_padded - b64_padding;
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const std::string_view b64_padding_string = b64_padding == 2 ? "=="sv
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: b64_padding == 1 ? "="sv
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: ""sv;
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if (bytes.size() == b64_unpadded
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|| (b64_padding > 0 && bytes.size() == b64_padded
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&& bytes.substr(b64_unpadded) == b64_padding_string))
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{
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if (oxenc::is_base64(bytes))
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{
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oxenc::from_base64(bytes.begin(), bytes.end(), val_data);
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return;
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}
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}
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}
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throw std::runtime_error{"Invalid binary value: unexpected size and/or encoding"};
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}
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nlohmann::json&
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json_binary_proxy::operator=(std::string_view binary_data)
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{
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switch (format)
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{
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case fmt::bt:
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return e = binary_data;
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case fmt::hex:
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return e = oxenc::to_hex(binary_data);
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case fmt::base64:
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return e = oxenc::to_base64(binary_data);
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}
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throw std::runtime_error{"Internal error: invalid binary encoding"};
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}
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} // namespace llarp::rpc
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