AES.cpp

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#include <sourcepp/crypto/AES.h>
 
#include <tomcrypt.h>
 
#include <sourcepp/crypto/Globals.h>
 
using namespace sourcepp;
 
namespace sourcepp::crypto {
 
const std::array<std::byte, 16> NULL_IV{};
 
} // namespace sourcepp::crypto
 
bool crypto::decryptAES_CFB(std::span<std::byte> buffer, std::span<const std::byte> key, std::span<const std::byte> iv) {
    if (!LTM_MATH || AES_INDEX < 0 || buffer.empty()) {
        return {};
    }
 
    const std::unique_ptr<symmetric_CFB, void(*)(symmetric_CFB*)> cfb{new symmetric_CFB, [](symmetric_CFB* c) { cfb_done(c); delete c; }};
    if (cfb_start(AES_INDEX, reinterpret_cast<const unsigned char*>(iv.data()), reinterpret_cast<const unsigned char*>(key.data()), static_cast<int>(key.size()), 0, cfb.get()) != CRYPT_OK) {
        return {};
    }
    const unsigned long bufferLen = buffer.size();
    return cfb_decrypt(reinterpret_cast<const unsigned char*>(buffer.data()), reinterpret_cast<unsigned char*>(buffer.data()), bufferLen, cfb.get()) == CRYPT_OK;
}
 
bool crypto::encryptAES_CFB(std::span<std::byte> buffer, std::span<const std::byte> key, std::span<const std::byte> iv) {
    if (!LTM_MATH || AES_INDEX < 0 || buffer.empty()) {
        return {};
    }
 
    const std::unique_ptr<symmetric_CFB, void(*)(symmetric_CFB*)> cfb{new symmetric_CFB, [](symmetric_CFB* c) { cfb_done(c); delete c; }};
    if (cfb_start(AES_INDEX, reinterpret_cast<const unsigned char*>(iv.data()), reinterpret_cast<const unsigned char*>(key.data()), static_cast<int>(key.size()), 0, cfb.get()) != CRYPT_OK) {
        return {};
    }
    const unsigned long bufferLen = buffer.size();
    return cfb_encrypt(reinterpret_cast<const unsigned char*>(buffer.data()), reinterpret_cast<unsigned char*>(buffer.data()), bufferLen, cfb.get()) == CRYPT_OK;
}