Reset crypt handler
This commit is contained in:
WolverinDEV
parent
ee8e5b9dd5
commit
d48c0f99f5
@ -5,11 +5,9 @@
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#include <ed25519/ed25519.h>
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#include <ed25519/ge.h>
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#include <log/LogUtils.h>
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#include "../misc/base64.h"
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#include "misc/memtracker.h"
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#include "misc/digest.h"
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#include "CryptionHandler.h"
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#include "../misc/sassert.h"
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using namespace std;
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using namespace ts;
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@ -29,7 +27,7 @@ void CryptionHandler::reset() {
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this->useDefaultChipherKeyNonce = true;
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this->iv_struct_length = 0;
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memset(this->iv_struct, 0, sizeof(this->iv_struct));
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memcpy(this->current_mac, CryptionHandler::default_mac, sizeof(CryptionHandler::default_mac));
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memcpy(this->current_mac, this->default_mac, sizeof(this->default_mac));
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for(auto& cache : this->cache_key_client)
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cache.generation = 0xFFEF;
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@ -37,82 +35,80 @@ void CryptionHandler::reset() {
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cache.generation = 0xFFEF;
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}
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#define SHARED_KEY_BUFFER_LENGTH (256)
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bool CryptionHandler::setupSharedSecret(const std::string& alpha, const std::string& beta, ecc_key *publicKey, ecc_key *ownKey, std::string &error) {
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size_t buffer_length = SHARED_KEY_BUFFER_LENGTH;
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uint8_t buffer[SHARED_KEY_BUFFER_LENGTH];
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size_t bufferLength = 128;
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uint8_t* buffer = new uint8_t[bufferLength];
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int err;
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if((err = ecc_shared_secret(ownKey, publicKey, buffer, (unsigned long*) &buffer_length)) != CRYPT_OK){
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if((err = ecc_shared_secret(ownKey, publicKey, buffer, (unsigned long*) &bufferLength)) != CRYPT_OK){
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delete[] buffer;
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error = "Could not calculate shared secret. Message: " + string(error_to_string(err));
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return false;
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}
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auto result = this->setupSharedSecret(alpha, beta, string((const char*) buffer, buffer_length), error);
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return result;
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auto result = this->setupSharedSecret(alpha, beta, string((const char*) buffer, bufferLength), error);
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delete[] buffer;
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return result;
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}
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bool CryptionHandler::setupSharedSecret(const std::string& alpha, const std::string& beta, const std::string& sharedKey, std::string &error) {
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bool CryptionHandler::setupSharedSecret(const std::string& alpha, const std::string& beta, const std::string &sharedKey, std::string &error) {
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auto secret_hash = digest::sha1(sharedKey);
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assert(secret_hash.length() == SHA_DIGEST_LENGTH);
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uint8_t iv_buffer[SHA_DIGEST_LENGTH];
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memcpy(iv_buffer, alpha.data(), 10);
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memcpy(&iv_buffer[10], beta.data(), 10);
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char ivStruct[SHA_DIGEST_LENGTH];
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memcpy(ivStruct, alpha.data(), 10);
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memcpy(&ivStruct[10], beta.data(), 10);
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for (int index = 0; index < SHA_DIGEST_LENGTH; index++) {
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iv_buffer[index] ^= (uint8_t) secret_hash[index];
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}
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for (int index = 0; index < SHA_DIGEST_LENGTH; index++) {
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ivStruct[index] ^= (uint8_t) secret_hash[index];
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}
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{
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lock_guard lock(this->cache_key_lock);
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memcpy(this->iv_struct, iv_buffer, SHA_DIGEST_LENGTH);
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memcpy(this->iv_struct, ivStruct, SHA_DIGEST_LENGTH);
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this->iv_struct_length = SHA_DIGEST_LENGTH;
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uint8_t mac_buffer[SHA_DIGEST_LENGTH];
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digest::sha1((const char*) iv_buffer, SHA_DIGEST_LENGTH, mac_buffer);
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memcpy(this->current_mac, mac_buffer, 8);
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auto iv_hash = digest::sha1(ivStruct, SHA_DIGEST_LENGTH);
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memcpy(this->current_mac, iv_hash.data(), 8);
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this->useDefaultChipherKeyNonce = false;
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}
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return true;
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return true;
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}
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void _fe_neg(fe h, const fe f) {
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int32_t f0 = f[0];
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int32_t f1 = f[1];
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int32_t f2 = f[2];
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int32_t f3 = f[3];
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int32_t f4 = f[4];
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int32_t f5 = f[5];
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int32_t f6 = f[6];
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int32_t f7 = f[7];
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int32_t f8 = f[8];
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int32_t f9 = f[9];
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int32_t h0 = -f0;
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int32_t h1 = -f1;
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int32_t h2 = -f2;
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int32_t h3 = -f3;
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int32_t h4 = -f4;
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int32_t h5 = -f5;
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int32_t h6 = -f6;
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int32_t h7 = -f7;
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int32_t h8 = -f8;
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int32_t h9 = -f9;
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int32_t f0 = f[0];
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int32_t f1 = f[1];
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int32_t f2 = f[2];
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int32_t f3 = f[3];
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int32_t f4 = f[4];
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int32_t f5 = f[5];
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int32_t f6 = f[6];
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int32_t f7 = f[7];
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int32_t f8 = f[8];
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int32_t f9 = f[9];
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int32_t h0 = -f0;
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int32_t h1 = -f1;
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int32_t h2 = -f2;
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int32_t h3 = -f3;
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int32_t h4 = -f4;
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int32_t h5 = -f5;
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int32_t h6 = -f6;
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int32_t h7 = -f7;
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int32_t h8 = -f8;
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int32_t h9 = -f9;
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h[0] = h0;
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h[1] = h1;
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h[2] = h2;
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h[3] = h3;
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h[4] = h4;
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h[5] = h5;
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h[6] = h6;
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h[7] = h7;
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h[8] = h8;
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h[9] = h9;
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h[0] = h0;
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h[1] = h1;
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h[2] = h2;
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h[3] = h3;
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h[4] = h4;
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h[5] = h5;
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h[6] = h6;
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h[7] = h7;
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h[8] = h8;
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h[9] = h9;
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}
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inline void keyMul(uint8_t(& target_buffer)[32], const uint8_t* publicKey /* compressed */, const uint8_t* privateKey /* uncompressed */, bool negate){
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inline std::string keyMul(const uint8_t* publicKey /* compressed */, const uint8_t* privateKey /* uncompressed */, bool negate){
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ge_p3 keyA{};
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ge_p2 result{};
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@ -123,32 +119,34 @@ inline void keyMul(uint8_t(& target_buffer)[32], const uint8_t* publicKey /* com
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}
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ge_scalarmult_vartime(&result, privateKey, &keyA);
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ge_tobytes(target_buffer, &result);
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char buffer[32];
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ge_tobytes((uint8_t*) buffer, &result);
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return string(buffer, 32);
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}
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bool CryptionHandler::setupSharedSecretNew(const std::string &alpha, const std::string &beta, const char* privateKey /* uncompressed */, const char* publicKey /* compressed */) {
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if(alpha.length() != 10 || beta.length() != 54)
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return false;
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assert(alpha.length() == 10);
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assert(beta.length() == 54);
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uint8_t shared[32];
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uint8_t shared_iv[64];
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ed25519_key_exchange(shared, (uint8_t*) publicKey, (uint8_t*) privateKey);
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keyMul(shared, reinterpret_cast<const uint8_t *>(publicKey), reinterpret_cast<const uint8_t *>(privateKey), true); //Remote key get negated
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digest::sha512((char*) shared, 32, shared_iv);
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string shared;
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string sharedIv;
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shared.resize(32, '\0');
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sharedIv.resize(64, '\0');
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ed25519_key_exchange((uint8_t*) shared.data(), (uint8_t*) publicKey, (uint8_t*) privateKey);
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shared = keyMul(reinterpret_cast<const uint8_t *>(publicKey), reinterpret_cast<const uint8_t *>(privateKey), true); //Remote key get negated
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sharedIv = digest::sha512(shared);
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auto xor_key = alpha + beta;
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for(int i = 0; i < 64; i++)
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shared_iv[i] ^= (uint8_t) xor_key[i];
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sharedIv[i] ^= xor_key[i];
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{
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lock_guard lock(this->cache_key_lock);
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memcpy(this->iv_struct, shared_iv, 64);
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memcpy(this->iv_struct, sharedIv.data(), 64);
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this->iv_struct_length = 64;
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uint8_t mac_buffer[SHA_DIGEST_LENGTH];
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digest::sha1((char*) this->iv_struct, 64, mac_buffer);
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memcpy(this->current_mac, mac_buffer, 8);
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auto digest_buffer = digest::sha1((char*) this->iv_struct, 64);
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memcpy(this->current_mac, digest_buffer.data(), 8);
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this->useDefaultChipherKeyNonce = false;
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}
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@ -167,7 +165,6 @@ bool CryptionHandler::generate_key_nonce(protocol::BasicPacket* packet, bool use
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);
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}
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#define GENERATE_BUFFER_LENGTH (128)
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bool CryptionHandler::generate_key_nonce(
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bool to_server, /* its from the client to the server */
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protocol::PacketType type,
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@ -178,8 +175,8 @@ bool CryptionHandler::generate_key_nonce(
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uint8_t (& nonce)[16]
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) {
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if (this->useDefaultChipherKeyNonce || use_default) {
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memcpy(key, CryptionHandler::default_key, 16);
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memcpy(nonce, CryptionHandler::default_nonce, 16);
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memcpy(key, this->default_key, 16);
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memcpy(nonce, this->default_nonce, 16);
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return true;
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}
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@ -191,11 +188,9 @@ bool CryptionHandler::generate_key_nonce(
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auto& key_cache = key_cache_array[type];
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if(key_cache.generation != generation) {
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const size_t buffer_length = 6 + this->iv_struct_length;
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sassert(buffer_length < GENERATE_BUFFER_LENGTH);
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char buffer[GENERATE_BUFFER_LENGTH];
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memset(buffer, 0, buffer_length);
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const size_t buffer_length = 6 + this->iv_struct_length;
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char* buffer = new char[buffer_length];
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memset(buffer, 0, 6 + this->iv_struct_length);
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if (to_server) {
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buffer[0] = 0x31;
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@ -206,13 +201,13 @@ bool CryptionHandler::generate_key_nonce(
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le2be32(generation, buffer, 2);
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memcpy(&buffer[6], this->iv_struct, this->iv_struct_length);
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digest::sha256(buffer, buffer_length, key_cache.key_nonce);
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auto key_nonce = digest::sha256(buffer, 6 + this->iv_struct_length);
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/*
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memcpy(key_cache.key, key_nonce.data(), 16);
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memcpy(key_cache.nonce, key_nonce.data() + 16, 16);
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*/
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key_cache.generation = generation;
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key_cache.generation = generation;
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delete[] buffer;
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}
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memcpy(key, key_cache.key, 16);
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@ -239,10 +234,9 @@ bool CryptionHandler::verify_encryption(const pipes::buffer_view &packet, uint16
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auto length = data.length();
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/* static shareable void buffer */
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const static unsigned long void_target_length = 2048;
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static uint8_t void_target_buffer[2048];
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if(void_target_length < length)
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const unsigned long target_length = 2048;
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uint8_t target_buffer[2048];
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if(target_length < length)
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return false;
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err = eax_decrypt_verify_memory(find_cipher("rijndael"),
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@ -253,10 +247,10 @@ bool CryptionHandler::verify_encryption(const pipes::buffer_view &packet, uint16
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(uint8_t *) header.data_ptr(), /* example header */
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(unsigned long) header.length(), /* header length */
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(const unsigned char *) data.data_ptr(),
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(unsigned long) data.length(),
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(unsigned char *) void_target_buffer,
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(unsigned long) data.length(),
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(unsigned char *) target_buffer,
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(unsigned char *) mac.data_ptr(),
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(unsigned long) mac.length(),
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(unsigned long) mac.length(),
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&success
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);
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@ -264,7 +258,7 @@ bool CryptionHandler::verify_encryption(const pipes::buffer_view &packet, uint16
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}
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bool CryptionHandler::decryptPacket(protocol::BasicPacket *packet, std::string &error, bool use_default) {
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int err;
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int err;
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int success = false;
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auto header = packet->header();
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@ -276,6 +270,14 @@ bool CryptionHandler::decryptPacket(protocol::BasicPacket *packet, std::string &
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return false;
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}
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size_t target_length = 2048;
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uint8_t target_buffer[2048];
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auto length = data.length();
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if(target_length < length) {
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error = "buffer too large";
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return false;
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}
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err = eax_decrypt_verify_memory(find_cipher("rijndael"),
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(uint8_t *) key, /* the key */
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(unsigned long) 16, /* key is 16 bytes */
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@ -284,10 +286,10 @@ bool CryptionHandler::decryptPacket(protocol::BasicPacket *packet, std::string &
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(uint8_t *) header.data_ptr(), /* example header */
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(unsigned long) header.length(), /* header length */
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(const unsigned char *) data.data_ptr(),
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(unsigned long) data.length(),
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(unsigned char *) data.data_ptr(),
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(unsigned long) data.length(),
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(unsigned char *) target_buffer,
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(unsigned char *) packet->mac().data_ptr(),
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(unsigned long) packet->mac().length(),
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(unsigned long) packet->mac().length(),
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&success
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);
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@ -300,8 +302,9 @@ bool CryptionHandler::decryptPacket(protocol::BasicPacket *packet, std::string &
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return false;
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}
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packet->data(pipes::buffer_view{target_buffer, length});
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packet->setEncrypted(false);
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return true;
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return true;
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}
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bool CryptionHandler::encryptPacket(protocol::BasicPacket *packet, std::string &error, bool use_default) {
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@ -313,8 +316,8 @@ bool CryptionHandler::encryptPacket(protocol::BasicPacket *packet, std::string &
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size_t length = packet->data().length();
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size_t tag_length = 8;
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char tag_buffer[8];
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size_t tag_length = 8;
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char tag_buffer[8];
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size_t target_length = 2048;
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uint8_t target_buffer[2048];
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@ -324,53 +327,52 @@ bool CryptionHandler::encryptPacket(protocol::BasicPacket *packet, std::string &
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}
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int err;
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if((err = eax_encrypt_authenticate_memory(find_cipher("rijndael"),
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(uint8_t *) key, /* the key */
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(unsigned long) 16, /* key is 16 bytes */
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(uint8_t *) nonce, /* the nonce */
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(unsigned long) 16, /* nonce is 16 bytes */
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(uint8_t *) packet->header().data_ptr(), /* example header */
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(unsigned long) packet->header().length(), /* header length */
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(uint8_t *) packet->data().data_ptr(), /* The plain text */
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(unsigned long) packet->data().length(), /* Plain text length */
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// (uint8_t *) packet->data().data_ptr(), /* The result buffer */
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(uint8_t *) target_buffer, /* The result buffer */
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(uint8_t *) tag_buffer,
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(unsigned long *) &tag_length
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)) != CRYPT_OK){
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error = "eax_encrypt_authenticate_memory(...) returned " + to_string(err) + "/" + error_to_string(err);
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return false;
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}
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assert(tag_length == 8);
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if((err = eax_encrypt_authenticate_memory(find_cipher("rijndael"),
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(uint8_t *) key, /* the key */
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(unsigned long) 16, /* key is 16 bytes */
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(uint8_t *) nonce, /* the nonce */
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(unsigned long) 16, /* nonce is 16 bytes */
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(uint8_t *) packet->header().data_ptr(), /* example header */
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(unsigned long) packet->header().length(), /* header length */
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(uint8_t *) packet->data().data_ptr(), /* The plain text */
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(unsigned long) packet->data().length(), /* Plain text length */
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(uint8_t *) target_buffer, /* The result buffer */
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(uint8_t *) tag_buffer,
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(unsigned long *) &tag_length
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)) != CRYPT_OK){
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error = "eax_encrypt_authenticate_memory(...) returned " + to_string(err) + "/" + error_to_string(err);
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return false;
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}
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assert(tag_length == 8);
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packet->data(pipes::buffer_view{target_buffer, length});
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packet->mac().write(tag_buffer, tag_length);
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packet->mac().write(tag_buffer, tag_length);
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packet->setEncrypted(true);
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return true;
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return true;
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}
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bool CryptionHandler::progressPacketIn(protocol::BasicPacket* packet, std::string& error, bool use_default) {
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while(blocked)
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this_thread::yield();
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while(blocked)
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this_thread::sleep_for(chrono::microseconds(100));
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if(packet->isEncrypted()){
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bool success = decryptPacket(packet, error, use_default);
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if(success) packet->setEncrypted(false);
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return success;
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}
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return true;
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if(packet->isEncrypted()){
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bool success = decryptPacket(packet, error, use_default);
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if(success) packet->setEncrypted(false);
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return success;
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}
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return true;
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}
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bool CryptionHandler::progressPacketOut(protocol::BasicPacket* packet, std::string& error, bool use_default) {
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while(blocked)
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this_thread::yield();
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while(blocked)
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this_thread::sleep_for(chrono::microseconds(100));
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if(packet->has_flag(PacketFlag::Unencrypted)) {
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packet->mac().write(this->current_mac, 8);
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} else {
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bool success = encryptPacket(packet, error, use_default);
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if(success) packet->setEncrypted(true);
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return success;
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}
|
||||
return true;
|
||||
if(packet->has_flag(PacketFlag::Unencrypted)) {
|
||||
packet->mac().write(this->current_mac, 8);
|
||||
} else {
|
||||
bool success = encryptPacket(packet, error, use_default);
|
||||
if(success) packet->setEncrypted(true);
|
||||
return success;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user