PurpleI2P
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i2pd
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support two encryption keys

pull/1515/head
orignal 5 years ago
parent
2fc16ee13d
commit
d923f0e01b
2 changed files with 69 additions and 36 deletions
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  1. 73
      libi2pd/Destination.cpp
  2. 32
      libi2pd/Destination.h

73
libi2pd/Destination.cpp
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@ -839,23 +839,26 @@ namespace client @@ -839,23 +839,26 @@ namespace client
if (keys.IsOfflineSignature () && GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_LEASESET)
SetLeaseSetType (i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2); // offline keys can be published with LS2 only
m_EncryptionKeyType = GetIdentity ()->GetCryptoKeyType ();
auto encryptionKeyType = GetIdentity ()->GetCryptoKeyType ();
// extract encryption type params for LS2
if (GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2 && params)
{
auto it = params->find (I2CP_PARAM_LEASESET_ENCRYPTION_TYPE);
if (it != params->end ())
m_EncryptionKeyType = std::stoi(it->second);
encryptionKeyType = std::stoi(it->second);
}
memset (m_EncryptionPrivateKey, 0, 256);
memset (m_EncryptionPublicKey, 0, 256);
auto encryptionKey = new EncryptionKey (encryptionKeyType);
if (isPublic)
PersistTemporaryKeys ();
PersistTemporaryKeys (encryptionKey);
else
i2p::data::PrivateKeys::GenerateCryptoKeyPair (m_EncryptionKeyType, m_EncryptionPrivateKey, m_EncryptionPublicKey);
encryptionKey->GenerateKeys ();
encryptionKey->CreateDecryptor ();
if (encryptionKeyType == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET)
m_ECIESx25519EncryptionKey.reset (encryptionKey);
else
m_StandardEncryptionKey.reset (encryptionKey);
m_Decryptor = i2p::data::PrivateKeys::CreateDecryptor (m_EncryptionKeyType, m_EncryptionPrivateKey);
if (isPublic)
LogPrint (eLogInfo, "Destination: Local address ", GetIdentHash().ToBase32 (), " created");
@ -1092,27 +1095,27 @@ namespace client @@ -1092,27 +1095,27 @@ namespace client
return ret;
}
void ClientDestination::PersistTemporaryKeys ()
void ClientDestination::PersistTemporaryKeys (EncryptionKey * keys)
{
std::string ident = GetIdentHash().ToBase32();
std::string path = i2p::fs::DataDirPath("destinations", (ident + ".dat"));
std::ifstream f(path, std::ifstream::binary);
if (f) {
f.read ((char *)m_EncryptionPublicKey, 256);
f.read ((char *)m_EncryptionPrivateKey, 256);
f.read ((char *)keys->pub, 256);
f.read ((char *)keys->priv, 256);
return;
}
LogPrint (eLogInfo, "Destination: Creating new temporary keys of type for address ", ident, ".b32.i2p");
memset (m_EncryptionPrivateKey, 0, 256);
memset (m_EncryptionPublicKey, 0, 256);
i2p::data::PrivateKeys::GenerateCryptoKeyPair (m_EncryptionKeyType, m_EncryptionPrivateKey, m_EncryptionPublicKey);
memset (keys->priv, 0, 256);
memset (keys->pub, 0, 256);
keys->GenerateKeys ();
// TODO:: persist crypto key type
std::ofstream f1 (path, std::ofstream::binary | std::ofstream::out);
if (f1) {
f1.write ((char *)m_EncryptionPublicKey, 256);
f1.write ((char *)m_EncryptionPrivateKey, 256);
f1.write ((char *)keys->pub, 256);
f1.write ((char *)keys->priv, 256);
return;
}
LogPrint(eLogError, "Destinations: Can't save keys to ", path);
@ -1123,18 +1126,27 @@ namespace client @@ -1123,18 +1126,27 @@ namespace client
std::shared_ptr<i2p::data::LocalLeaseSet> leaseSet;
if (GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_LEASESET)
{
leaseSet = std::make_shared<i2p::data::LocalLeaseSet> (GetIdentity (), m_EncryptionPublicKey, tunnels);
// sign
Sign (leaseSet->GetBuffer (), leaseSet->GetBufferLen () - leaseSet->GetSignatureLen (), leaseSet->GetSignature ());
if (m_StandardEncryptionKey)
{
leaseSet = std::make_shared<i2p::data::LocalLeaseSet> (GetIdentity (), m_StandardEncryptionKey->pub, tunnels);
// sign
Sign (leaseSet->GetBuffer (), leaseSet->GetBufferLen () - leaseSet->GetSignatureLen (), leaseSet->GetSignature ());
}
else
LogPrint (eLogError, "Destinations: Wrong encryption key type for LeaseSet type 1");
}
else
{
// standard LS2 (type 3) first
uint16_t keyLen = m_Decryptor ? m_Decryptor->GetPublicKeyLen () : 256;
i2p::data::LocalLeaseSet2::KeySections keySections;
if (m_ECIESx25519EncryptionKey)
keySections.push_back ({m_ECIESx25519EncryptionKey->keyType, 32, m_ECIESx25519EncryptionKey->pub} );
if (m_StandardEncryptionKey)
keySections.push_back ({m_StandardEncryptionKey->keyType, (uint16_t)m_StandardEncryptionKey->decryptor->GetPublicKeyLen (), m_StandardEncryptionKey->pub} );
bool isPublishedEncrypted = GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_ENCRYPTED_LEASESET2;
auto ls2 = std::make_shared<i2p::data::LocalLeaseSet2> (i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2,
m_Keys, i2p::data::LocalLeaseSet2::KeySections { {m_EncryptionKeyType, keyLen, m_EncryptionPublicKey} },
tunnels, IsPublic (), isPublishedEncrypted);
m_Keys, keySections, tunnels, IsPublic (), isPublishedEncrypted);
if (isPublishedEncrypted) // encrypt if type 5
ls2 = std::make_shared<i2p::data::LocalEncryptedLeaseSet2> (ls2, m_Keys, GetAuthType (), m_AuthKeys);
leaseSet = ls2;
@ -1149,13 +1161,28 @@ namespace client @@ -1149,13 +1161,28 @@ namespace client
bool ClientDestination::Decrypt (const uint8_t * encrypted, uint8_t * data, BN_CTX * ctx, i2p::data::CryptoKeyType preferredCrypto) const
{
if (m_Decryptor)
return m_Decryptor->Decrypt (encrypted, data, ctx, true);
if (preferredCrypto == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET)
if (m_ECIESx25519EncryptionKey && m_ECIESx25519EncryptionKey->decryptor)
return m_ECIESx25519EncryptionKey->decryptor->Decrypt (encrypted, data, ctx, true);
if (m_StandardEncryptionKey && m_StandardEncryptionKey->decryptor)
return m_StandardEncryptionKey->decryptor->Decrypt (encrypted, data, ctx, true);
else
LogPrint (eLogError, "Destinations: decryptor is not set");
return false;
}
bool ClientDestination::SupportsEncryptionType (i2p::data::CryptoKeyType keyType) const
{
return keyType == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET ? (bool)m_ECIESx25519EncryptionKey : (bool)m_StandardEncryptionKey;
}
const uint8_t * ClientDestination::GetEncryptionPublicKey (i2p::data::CryptoKeyType keyType) const
{
if (keyType == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET)
return m_ECIESx25519EncryptionKey ? m_ECIESx25519EncryptionKey->pub : nullptr;
return m_StandardEncryptionKey ? m_StandardEncryptionKey->pub : nullptr;
}
void ClientDestination::ReadAuthKey (const std::string& group, const std::map<std::string, std::string> * params)
{
for (auto it: *params)

32
libi2pd/Destination.h
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@ -1,6 +1,7 @@ @@ -1,6 +1,7 @@
#ifndef DESTINATION_H__
#define DESTINATION_H__
#include <string.h>
#include <thread>
#include <mutex>
#include <memory>
@ -192,6 +193,17 @@ namespace client @@ -192,6 +193,17 @@ namespace client
class ClientDestination: public LeaseSetDestination
{
struct EncryptionKey
{
uint8_t pub[256], priv[256];
i2p::data::CryptoKeyType keyType;
std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> decryptor;
EncryptionKey (i2p::data::CryptoKeyType t):keyType(t) { memset (pub, 0, 256); memset (priv, 0, 256); };
void GenerateKeys () { i2p::data::PrivateKeys::GenerateCryptoKeyPair (keyType, priv, pub); };
void CreateDecryptor () { decryptor = i2p::data::PrivateKeys::CreateDecryptor (keyType, priv); };
};
public:
ClientDestination (boost::asio::io_service& service, const i2p::data::PrivateKeys& keys,
@ -229,13 +241,8 @@ namespace client @@ -229,13 +241,8 @@ namespace client
// implements LocalDestination
bool Decrypt (const uint8_t * encrypted, uint8_t * data, BN_CTX * ctx, i2p::data::CryptoKeyType preferredCrypto) const;
std::shared_ptr<const i2p::data::IdentityEx> GetIdentity () const { return m_Keys.GetPublic (); };
bool SupportsEncryptionType (i2p::data::CryptoKeyType keyType) const
{
return keyType == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET ?
m_EncryptionKeyType == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET :
m_EncryptionKeyType < i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET;
}
const uint8_t * GetEncryptionPublicKey (i2p::data::CryptoKeyType keyType) const { return m_EncryptionPublicKey; };
bool SupportsEncryptionType (i2p::data::CryptoKeyType keyType) const;
const uint8_t * GetEncryptionPublicKey (i2p::data::CryptoKeyType keyType) const;
protected:
@ -249,15 +256,14 @@ namespace client @@ -249,15 +256,14 @@ namespace client
std::shared_ptr<ClientDestination> GetSharedFromThis () {
return std::static_pointer_cast<ClientDestination>(shared_from_this ());
}
void PersistTemporaryKeys ();
void PersistTemporaryKeys (EncryptionKey * keys);
void ReadAuthKey (const std::string& group, const std::map<std::string, std::string> * params);
private:
private:
i2p::data::PrivateKeys m_Keys;
uint8_t m_EncryptionPublicKey[256], m_EncryptionPrivateKey[256];
i2p::data::CryptoKeyType m_EncryptionKeyType;
std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> m_Decryptor;
std::unique_ptr<EncryptionKey> m_StandardEncryptionKey;
std::unique_ptr<EncryptionKey> m_ECIESx25519EncryptionKey;
int m_StreamingAckDelay;
std::shared_ptr<i2p::stream::StreamingDestination> m_StreamingDestination; // default

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