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blind public key for encrypted LeaseSet2

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orignal 2019-03-05 15:51:24 -05:00
parent ea3070d02b
commit 32e55ebd0c
4 changed files with 30 additions and 2 deletions
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11
libi2pd/LeaseSet.cpp
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@ -3,6 +3,7 @@
#include <openssl/hmac.h>
#include "I2PEndian.h"
#include "Crypto.h"
#include "Ed25519.h"
#include "Log.h"
#include "Timestamp.h"
#include "NetDb.hpp"
@ -532,6 +533,16 @@ namespace data
HMAC(EVP_sha256(), prk, 32, out, 41, out + 32, &len);
}
void LeaseSet2::BlindPublicKey (std::shared_ptr<const IdentityEx> identity, const char * date, SigningKeyType blindedKeyType, uint8_t * blindedKey)
{
uint16_t stA = htobe16 (identity->GetSigningKeyType ()), stA1 = htobe16 (blindedKeyType);
uint8_t salt[32], seed[64];
//seed = HKDF(H("I2PGenerateAlpha", keydata), datestring || secret, "i2pblinding1", 64)
H ("I2PGenerateAlpha", { {identity->GetSigningPublicKeyBuffer (), identity->GetSigningPublicKeyLen ()}, {(const uint8_t *)&stA, 2}, {(const uint8_t *)&stA1, 2} }, salt);
HKDF (salt, { (const uint8_t *)date, 8 }, "i2pblinding1", seed);
i2p::crypto::GetEd25519 ()->BlindPublicKey (identity->GetSigningPublicKeyBuffer (), seed, blindedKey);
}
void LeaseSet2::Encrypt (const uint8_t * data, uint8_t * encrypted, BN_CTX * ctx) const
{
auto encryptor = m_Encryptor; // TODO: atomic