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publish offline signature

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orignal 2019-02-12 14:56:39 -05:00
parent a463dbc5fb
commit 72a239838e
5 changed files with 32 additions and 9 deletions
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7
libi2pd/Destination.cpp
View file

@ -777,6 +777,9 @@ namespace client
m_DatagramDestination (nullptr), m_RefCounter (0),
m_ReadyChecker(GetService())
{
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 ();
// extract encryption type params for LS2
if (GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2 && params)
@ -1048,9 +1051,7 @@ namespace client
// standard LS2 (type 3) assumed for now. TODO: implement others
auto keyLen = m_Decryptor ? m_Decryptor->GetPublicKeyLen () : 256;
leaseSet = new i2p::data::LocalLeaseSet2 (i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2,
GetIdentity (), m_EncryptionKeyType, keyLen, m_EncryptionPublicKey, tunnels);
// sign
Sign (leaseSet->GetBuffer () - 1, leaseSet->GetBufferLen () - leaseSet->GetSignatureLen () + 1, leaseSet->GetSignature ()); // + leading store type
m_Keys, m_EncryptionKeyType, keyLen, m_EncryptionPublicKey, tunnels);
}
SetLeaseSet (leaseSet);
}

1
libi2pd/Destination.h
View file

@ -126,6 +126,7 @@ namespace client
void SetLeaseSet (i2p::data::LocalLeaseSet * newLeaseSet);
int GetLeaseSetType () const { return m_LeaseSetType; };
void SetLeaseSetType (int leaseSetType) { m_LeaseSetType = leaseSetType; };
virtual void CleanupDestination () {}; // additional clean up in derived classes
// I2CP
virtual void HandleDataMessage (const uint8_t * buf, size_t len) = 0;

2
libi2pd/Identity.h
View file

@ -163,7 +163,9 @@ namespace data
static void GenerateSigningKeyPair (SigningKeyType type, uint8_t * priv, uint8_t * pub);
static void GenerateCryptoKeyPair (CryptoKeyType type, uint8_t * priv, uint8_t * pub); // priv and pub are 256 bytes long
// offline keys
PrivateKeys CreateOfflineKeys (SigningKeyType type, uint32_t expires) const;
const std::vector<uint8_t> GetOfflineSignature () const { return m_OfflineSignature; };
private:

26
libi2pd/LeaseSet.cpp
View file

@ -285,7 +285,7 @@ namespace data
uint16_t expires = bufbe16toh (buf + offset); offset += 2; // expires (seconds)
SetExpirationTime ((timestamp + expires)*1000LL); // in milliseconds
uint16_t flags = bufbe16toh (buf + offset); offset += 2; // flags
if (flags & 0x0001)
if (flags & LEASESET2_FLAG_OFFLINE_KEYS)
{
// transient key
m_TransientVerifier = ProcessOfflineSignature (identity, buf, len, offset);
@ -431,7 +431,7 @@ namespace data
uint16_t expires = bufbe16toh (buf + offset); offset += 2; // expires (seconds)
SetExpirationTime ((timestamp + expires)*1000LL); // in milliseconds
uint16_t flags = bufbe16toh (buf + offset); offset += 2; // flags
if (flags & 0x0001)
if (flags & LEASESET2_FLAG_OFFLINE_KEYS)
{
// transient key
m_TransientVerifier = ProcessOfflineSignature (blindedVerifier, buf, len, offset);
@ -579,16 +579,24 @@ namespace data
return ident.Verify(ptr, leases - ptr, leases);
}
LocalLeaseSet2::LocalLeaseSet2 (uint8_t storeType, std::shared_ptr<const IdentityEx> identity,
LocalLeaseSet2::LocalLeaseSet2 (uint8_t storeType, const i2p::data::PrivateKeys& keys,
uint16_t keyType, uint16_t keyLen, const uint8_t * encryptionPublicKey,
std::vector<std::shared_ptr<i2p::tunnel::InboundTunnel> > tunnels):
LocalLeaseSet (identity, nullptr, 0)
LocalLeaseSet (keys.GetPublic (), nullptr, 0)
{
auto identity = keys.GetPublic ();
// assume standard LS2
int num = tunnels.size ();
if (num > MAX_NUM_LEASES) num = MAX_NUM_LEASES;
m_BufferLen = identity->GetFullLen () + 4/*published*/ + 2/*expires*/ + 2/*flag*/ + 2/*properties len*/ +
1/*num keys*/ + 2/*key type*/ + 2/*key len*/ + keyLen/*key*/ + 1/*num leases*/ + num*LEASE2_SIZE + identity->GetSignatureLen ();
uint16_t flags = 0;
if (keys.IsOfflineSignature ())
{
flags |= LEASESET2_FLAG_OFFLINE_KEYS;
m_BufferLen += keys.GetOfflineSignature ().size ();
}
m_Buffer = new uint8_t[m_BufferLen + 1];
m_Buffer[0] = storeType;
// LS2 header
@ -597,6 +605,13 @@ namespace data
htobe32buf (m_Buffer + offset, timestamp); offset += 4; // published timestamp (seconds)
uint8_t * expiresBuf = m_Buffer + offset; offset += 2; // expires, fill later
htobe16buf (m_Buffer + offset, 0); offset += 2; // flags
if (keys.IsOfflineSignature ())
{
// offline signature
const auto& offlineSignature = keys.GetOfflineSignature ();
memcpy (m_Buffer + offset, offlineSignature.data (), offlineSignature.size ());
offset += offlineSignature.size ();
}
htobe16buf (m_Buffer + offset, 0); offset += 2; // properties len
// keys
m_Buffer[offset] = 1; offset++; // 1 key
@ -621,7 +636,8 @@ namespace data
SetExpirationTime (expirationTime*1000LL);
auto expires = expirationTime - timestamp;
htobe16buf (expiresBuf, expires > 0 ? expires : 0);
// we don't sign it yet. must be signed later on
// sign
keys.Sign (m_Buffer, offset, m_Buffer + offset); // LS + leading store type
}
LocalLeaseSet2::LocalLeaseSet2 (uint8_t storeType, std::shared_ptr<const IdentityEx> identity, const uint8_t * buf, size_t len):

5
libi2pd/LeaseSet.h
View file

@ -124,6 +124,9 @@ namespace data
const uint8_t NETDB_STORE_TYPE_STANDARD_LEASESET2 = 3;
const uint8_t NETDB_STORE_TYPE_ENCRYPTED_LEASESET2 = 5;
const uint8_t NETDB_STORE_TYPE_META_LEASESET2 = 7;
const uint16_t LEASESET2_FLAG_OFFLINE_KEYS = 0x0001;
class LeaseSet2: public LeaseSet
{
public:
@ -211,7 +214,7 @@ namespace data
{
public:
LocalLeaseSet2 (uint8_t storeType, std::shared_ptr<const IdentityEx> identity,
LocalLeaseSet2 (uint8_t storeType, const i2p::data::PrivateKeys& keys,
uint16_t keyType, uint16_t keyLen, const uint8_t * encryptionPublicKey,
std::vector<std::shared_ptr<i2p::tunnel::InboundTunnel> > tunnels);
LocalLeaseSet2 (uint8_t storeType, std::shared_ptr<const IdentityEx> identity, const uint8_t * buf, size_t len);