File qmc.cc
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#include <qqmusic/crypto/cipher_map.h>
#include <qqmusic/crypto/cipher_rc4.h>
#include <qqmusic/crypto/cipher_tea.h>
#include <qqmusic/crypto/key_derive.h>
#include <qqmusic/crypto/qmc.h>
#include <qqmusic/utils/buffer.h>
#include <utility>
namespace qqmusic::crypto {
Decoder::Decoder(std::string&& ekey)
: ekey((uint8_t*) ekey.data(), ekey.size()){};
bool read2buf(qqmusic::utils::buffer&& buf) {
qqmusic::utils::buffer buf_in(std::move(buf));
if (buf_in.size() < 0) {
return false;
} else {
return true;
}
}
bool Decoder::decrypt() {
// 解密密钥
auto key = qqmusic::crypto::KeyDerive::derive(std::move(ekey));
// 初始化解密算法
if (key.size() > 300) {
cipher = std::make_unique<RC4Cipher>(key);
cipher->decrypt(buf_in, 0);
buf_out.insert(buf_out.end(), buf_in.begin(), buf_in.end());
} else if (!key.empty()) {
cipher = std::make_unique<MapCipher>(key);
cipher->decrypt(buf_in, 0);
buf_out.insert(buf_out.end(), buf_in.begin(), buf_in.end());
} else {
std::cout << "Decoder decrypt failed! key size abnormal!" << std::endl;
return false;
}
return true;
}
} // namespace qqmusic::crypto