Some useful tools for I2P
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#include <openssl/evp.h>
#include <openssl/bn.h>
#include <iostream>
#include <string>
#include <iomanip>
#include "Base.h"
#define KEYSIZE 32
size_t len = KEYSIZE;
struct BoxKeys
{
uint8_t PublicKey[KEYSIZE];
uint8_t PrivateKey[KEYSIZE];
};
BoxKeys getKeyPair()
{
BoxKeys keys;
EVP_PKEY_CTX * Ctx;
EVP_PKEY * Pkey = nullptr;
Ctx = EVP_PKEY_CTX_new_id (NID_X25519, NULL);
EVP_PKEY_keygen_init (Ctx);
EVP_PKEY_keygen (Ctx, &Pkey);
EVP_PKEY_get_raw_public_key (Pkey, keys.PublicKey, &len);
EVP_PKEY_get_raw_private_key (Pkey, keys.PrivateKey, &len);
EVP_PKEY_CTX_free(Ctx);
EVP_PKEY_free(Pkey);
return keys;
}
int main(int argc, char * argv[])
{
if (argc > 1)
{
std::string arg = static_cast<std::string>(argv[1]);
if (arg == "--usage" || arg == "--help" || arg == "-h")
{
std::cout << "The x25519 keys are used for authentication with an encrypted LeaseSet.\n"
<< "Server side:\n"
<< " signaturetype = 11\n"
<< " i2cp.leaseSetType = 5\n"
<< " i2cp.leaseSetAuthType = 1\n"
<< " i2cp.leaseSetClient.dh.210 = clientName:PublicKey\n"
<< "Client side:\n"
<< " i2cp.leaseSetPrivKey = PrivateKey\n\n"
<< "https://i2pd.readthedocs.io/en/latest/user-guide/tunnels/" << std::endl;
return 0;
}
}
BoxKeys newKeys = getKeyPair();
size_t len_out = 50;
char b64Public[len_out] = {0};
char b64Private[len_out] = {0};
i2p::data::ByteStreamToBase64 (newKeys.PublicKey, len, b64Public, len_out);
std::cout << "PublicKey: ";
for (int i = 0; b64Public[i] != 0; ++i)
std::cout << b64Public[i];
i2p::data::ByteStreamToBase64 (newKeys.PrivateKey, len, b64Private, len_out);
std::cout << "\nPrivateKey: ";
for (int i = 0; b64Private[i] != 0; ++i)
std::cout << b64Private[i];
std::cout << std::endl;
return 0;
}