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select preferred crypto from LeaseSet2

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orignal 2020-02-12 11:09:20 -05:00
parent 53a6162b0c
commit 09ed57ad42
5 changed files with 24 additions and 15 deletions
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21
libi2pd/LeaseSet.cpp
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@ -251,18 +251,19 @@ namespace data
memcpy (m_Buffer, buf, len);
}
LeaseSet2::LeaseSet2 (uint8_t storeType, const uint8_t * buf, size_t len, bool storeLeases):
LeaseSet (storeLeases), m_StoreType (storeType)
LeaseSet2::LeaseSet2 (uint8_t storeType, const uint8_t * buf, size_t len, bool storeLeases, CryptoKeyType preferredCrypto):
LeaseSet (storeLeases), m_StoreType (storeType), m_EncryptionType (preferredCrypto)
{
SetBuffer (buf, len);
SetBuffer (buf, len);
if (storeType == NETDB_STORE_TYPE_ENCRYPTED_LEASESET2)
ReadFromBufferEncrypted (buf, len, nullptr, nullptr);
else
ReadFromBuffer (buf, len);
}
LeaseSet2::LeaseSet2 (const uint8_t * buf, size_t len, std::shared_ptr<const BlindedPublicKey> key, const uint8_t * secret):
LeaseSet (true), m_StoreType (NETDB_STORE_TYPE_ENCRYPTED_LEASESET2)
LeaseSet2::LeaseSet2 (const uint8_t * buf, size_t len, std::shared_ptr<const BlindedPublicKey> key,
const uint8_t * secret, CryptoKeyType preferredCrypto):
LeaseSet (true), m_StoreType (NETDB_STORE_TYPE_ENCRYPTED_LEASESET2), m_EncryptionType (preferredCrypto)
{
ReadFromBufferEncrypted (buf, len, key, secret);
}
@ -355,6 +356,8 @@ namespace data
offset += propertiesLen; // skip for now. TODO: implement properties
if (offset + 1 >= len) return 0;
// key sections
CryptoKeyType preferredKeyType = m_EncryptionType;
bool preferredKeyFound = false;
int numKeySections = buf[offset]; offset++;
for (int i = 0; i < numKeySections; i++)
{
@ -362,15 +365,15 @@ namespace data
if (offset + 2 >= len) return 0;
uint16_t encryptionKeyLen = bufbe16toh (buf + offset); offset += 2;
if (offset + encryptionKeyLen >= len) return 0;
if (IsStoreLeases ()) // create encryptor with leases only
if (IsStoreLeases () && !preferredKeyFound) // create encryptor with leases only
{
// we pick first valid key, higher key type has higher priority 4-1-0
// if two keys with of the same type, pick first
// we pick first valid key if preferred not found
auto encryptor = i2p::data::IdentityEx::CreateEncryptor (keyType, buf + offset);
if (encryptor && (!m_Encryptor || keyType > m_EncryptionType))
if (encryptor && (!m_Encryptor || keyType == preferredKeyType))
{
m_Encryptor = encryptor; // TODO: atomic
m_EncryptionType = keyType;
if (keyType == preferredKeyType) preferredKeyFound = true;
}
}
offset += encryptionKeyLen;