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compressable crypto key and padding for routers and destination

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orignal 2022-10-24 15:12:07 -04:00
parent 01ea1854bc
commit 3d4d3ce80d
5 changed files with 29 additions and 16 deletions
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29
libi2pd/Identity.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2020, The PurpleI2P Project
* Copyright (c) 2013-2022, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
@ -49,13 +49,22 @@ namespace data
IdentityEx::IdentityEx(const uint8_t * publicKey, const uint8_t * signingKey, SigningKeyType type, CryptoKeyType cryptoType)
{
uint8_t randomPaddingBlock[32];
RAND_bytes (randomPaddingBlock, 32);
if (cryptoType == CRYPTO_KEY_TYPE_ECIES_X25519_AEAD)
{
memcpy (m_StandardIdentity.publicKey, publicKey, 32);
RAND_bytes (m_StandardIdentity.publicKey + 32, 224);
memcpy (m_StandardIdentity.publicKey, publicKey ? publicKey : randomPaddingBlock, 32);
for (int i = 0; i < 7; i++) // 224 bytes
memcpy (m_StandardIdentity.publicKey + 32*i, randomPaddingBlock, 32);
}
else
memcpy (m_StandardIdentity.publicKey, publicKey, 256);
{
if (publicKey)
memcpy (m_StandardIdentity.publicKey, publicKey, 256);
else
for (int i = 0; i < 8; i++) // 256 bytes
memcpy (m_StandardIdentity.publicKey + 32*i, randomPaddingBlock, 32);
}
if (type != SIGNING_KEY_TYPE_DSA_SHA1)
{
size_t excessLen = 0;
@ -93,7 +102,8 @@ namespace data
case SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519:
{
size_t padding = 128 - i2p::crypto::EDDSA25519_PUBLIC_KEY_LENGTH; // 96 = 128 - 32
RAND_bytes (m_StandardIdentity.signingKey, padding);
for (int i = 0; i < 3; i++) // 96 bytes
memcpy (m_StandardIdentity.signingKey + 32*i, randomPaddingBlock, 32);
memcpy (m_StandardIdentity.signingKey + padding, signingKey, i2p::crypto::EDDSA25519_PUBLIC_KEY_LENGTH);
break;
}
@ -695,7 +705,7 @@ namespace data
return nullptr;
}
PrivateKeys PrivateKeys::CreateRandomKeys (SigningKeyType type, CryptoKeyType cryptoType)
PrivateKeys PrivateKeys::CreateRandomKeys (SigningKeyType type, CryptoKeyType cryptoType, bool isDestination)
{
if (type != SIGNING_KEY_TYPE_DSA_SHA1)
{
@ -705,9 +715,12 @@ namespace data
GenerateSigningKeyPair (type, keys.m_SigningPrivateKey, signingPublicKey);
// encryption
uint8_t publicKey[256];
GenerateCryptoKeyPair (cryptoType, keys.m_PrivateKey, publicKey);
if (isDestination)
RAND_bytes (keys.m_PrivateKey, 256);
else
GenerateCryptoKeyPair (cryptoType, keys.m_PrivateKey, publicKey);
// identity
keys.m_Public = std::make_shared<IdentityEx> (publicKey, signingPublicKey, type, cryptoType);
keys.m_Public = std::make_shared<IdentityEx> (isDestination ? nullptr : publicKey, signingPublicKey, type, cryptoType);
keys.CreateSigner ();
return keys;

4
libi2pd/Identity.h
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2021, The PurpleI2P Project
* Copyright (c) 2013-2022, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
@ -171,7 +171,7 @@ namespace data
std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> CreateDecryptor (const uint8_t * key) const;
static std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> CreateDecryptor (CryptoKeyType cryptoType, const uint8_t * key);
static PrivateKeys CreateRandomKeys (SigningKeyType type = SIGNING_KEY_TYPE_DSA_SHA1, CryptoKeyType cryptoType = CRYPTO_KEY_TYPE_ELGAMAL);
static PrivateKeys CreateRandomKeys (SigningKeyType type = SIGNING_KEY_TYPE_DSA_SHA1, CryptoKeyType cryptoType = CRYPTO_KEY_TYPE_ELGAMAL, bool isDestination = false);
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
static i2p::crypto::Signer * CreateSigner (SigningKeyType keyType, const uint8_t * priv);