mirror of https://github.com/oxen-io/lokinet
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
352 lines
9.2 KiB
C++
352 lines
9.2 KiB
C++
#include <llarp/crypto_async.h>
|
|
#include <llarp/mem.h>
|
|
#include <string.h>
|
|
#include "buffer.hpp"
|
|
#include "mem.hpp"
|
|
|
|
struct llarp_async_iwp
|
|
{
|
|
struct llarp_alloc *mem;
|
|
struct llarp_crypto *crypto;
|
|
struct llarp_logic *logic;
|
|
struct llarp_threadpool *worker;
|
|
};
|
|
|
|
namespace iwp
|
|
{
|
|
void
|
|
inform_keygen(void *user)
|
|
{
|
|
iwp_async_keygen *keygen = static_cast< iwp_async_keygen * >(user);
|
|
keygen->hook(keygen);
|
|
}
|
|
|
|
void
|
|
keygen(void *user)
|
|
{
|
|
iwp_async_keygen *keygen = static_cast< iwp_async_keygen * >(user);
|
|
keygen->iwp->crypto->encryption_keygen(keygen->keybuf);
|
|
llarp_thread_job job = {.user = user, .work = &inform_keygen};
|
|
llarp_logic_queue_job(keygen->iwp->logic, job);
|
|
}
|
|
|
|
void
|
|
inform_gen_intro(void *user)
|
|
{
|
|
iwp_async_intro *intro = static_cast< iwp_async_intro * >(user);
|
|
intro->hook(intro);
|
|
}
|
|
|
|
void
|
|
gen_intro(void *user)
|
|
{
|
|
iwp_async_intro *intro = static_cast< iwp_async_intro * >(user);
|
|
llarp_sharedkey_t sharedkey;
|
|
llarp_shorthash_t e_k;
|
|
llarp_nonce_t n;
|
|
llarp_crypto *crypto = intro->iwp->crypto;
|
|
byte_t tmp[64];
|
|
// S = TKE(a.k, b.k, n)
|
|
crypto->transport_dh_client(sharedkey, intro->remote_pubkey,
|
|
intro->secretkey, intro->nonce);
|
|
auto buf = llarp::StackBuffer< decltype(tmp) >(tmp);
|
|
// copy nonce
|
|
memcpy(n, intro->nonce, 24);
|
|
// e_k = HS(b.k + n)
|
|
memcpy(tmp, intro->remote_pubkey, 32);
|
|
memcpy(tmp + 32, intro->nonce, 32);
|
|
crypto->shorthash(e_k, buf);
|
|
// e = SE(a.k, e_k, n[0:24])
|
|
memcpy(intro->buf + 64, llarp_seckey_topublic(intro->secretkey), 32);
|
|
buf.base = intro->buf + 64;
|
|
buf.cur = buf.base;
|
|
buf.sz = 32;
|
|
crypto->xchacha20(buf, e_k, n);
|
|
// h = MDS( n + e + w0, S)
|
|
buf.base = intro->buf + 32;
|
|
buf.cur = buf.base;
|
|
buf.sz = intro->sz - 32;
|
|
crypto->hmac(intro->buf, buf, sharedkey);
|
|
llarp::dumphex< llarp_hmac_t >(intro->buf);
|
|
// inform result
|
|
llarp_logic_queue_job(intro->iwp->logic, {intro, &inform_gen_intro});
|
|
}
|
|
|
|
void
|
|
inform_verify_intro(void *user)
|
|
{
|
|
iwp_async_intro *intro = static_cast< iwp_async_intro * >(user);
|
|
intro->hook(intro);
|
|
}
|
|
|
|
void
|
|
verify_intro(void *user)
|
|
{
|
|
iwp_async_intro *intro = static_cast< iwp_async_intro * >(user);
|
|
auto crypto = intro->iwp->crypto;
|
|
llarp_sharedkey_t sharedkey;
|
|
llarp_shorthash_t e_K;
|
|
llarp_hmac_t h;
|
|
llarp_nonce_t N;
|
|
byte_t tmp[64];
|
|
auto OurPK = llarp_seckey_topublic(intro->secretkey);
|
|
// e_k = HS(b.k + n)
|
|
memcpy(tmp, OurPK, 32);
|
|
memcpy(tmp + 32, intro->nonce, 32);
|
|
auto buf = llarp::StackBuffer< decltype(tmp) >(tmp);
|
|
crypto->shorthash(e_K, buf);
|
|
|
|
// a.k = SD(x, e_k, n[0:24])
|
|
memcpy(N, intro->nonce, 24);
|
|
buf.base = intro->remote_pubkey;
|
|
buf.cur = buf.base;
|
|
buf.sz = 32;
|
|
memcpy(intro->remote_pubkey, intro->buf + 64, 32);
|
|
crypto->xchacha20(buf, e_K, N);
|
|
|
|
// S = TKE(a.k, b.k, n)
|
|
crypto->transport_dh_server(sharedkey, intro->remote_pubkey,
|
|
intro->secretkey, intro->nonce);
|
|
// h = MDS( n + e + w2 )
|
|
buf.base = intro->buf + 32;
|
|
buf.cur = buf.base;
|
|
buf.sz = intro->sz - 32;
|
|
crypto->hmac(h, buf, sharedkey);
|
|
if(memcmp(h, intro->buf, 32))
|
|
{
|
|
// hmac fail
|
|
intro->buf = nullptr;
|
|
}
|
|
// inform result
|
|
llarp_logic_queue_job(intro->iwp->logic, {intro, &inform_verify_intro});
|
|
}
|
|
|
|
void
|
|
inform_verify_introack(void *user)
|
|
{
|
|
iwp_async_introack *introack = static_cast< iwp_async_introack * >(user);
|
|
introack->hook(introack);
|
|
}
|
|
|
|
void
|
|
verify_introack(void *user)
|
|
{
|
|
iwp_async_introack *introack = static_cast< iwp_async_introack * >(user);
|
|
auto crypto = introack->iwp->crypto;
|
|
auto logic = introack->iwp->logic;
|
|
|
|
llarp_hmac_t digest;
|
|
llarp_sharedkey_t sharedkey;
|
|
|
|
auto hmac = introack->buf;
|
|
auto body = introack->buf + 32;
|
|
auto pubkey = introack->remote_pubkey;
|
|
auto secretkey = introack->secretkey;
|
|
auto nonce = introack->buf + 32;
|
|
auto token = introack->buf + 64;
|
|
size_t bodysz = introack->sz - 32;
|
|
llarp_buffer_t buf;
|
|
buf.base = body;
|
|
buf.cur = body;
|
|
buf.sz = bodysz;
|
|
|
|
// S = TKE(a.k, b.k, n)
|
|
crypto->transport_dh_client(sharedkey, pubkey, secretkey, nonce);
|
|
|
|
// h = MDS(n + x + w1, S)
|
|
crypto->hmac(digest, buf, sharedkey);
|
|
|
|
if(!llarp_eq(digest, hmac, 32))
|
|
{
|
|
// fail to verify hmac
|
|
introack->buf = nullptr;
|
|
}
|
|
else
|
|
{
|
|
buf.base = token;
|
|
buf.sz = 32;
|
|
// token = SD(S, x, n[0:24])
|
|
crypto->xchacha20(buf, sharedkey, nonce);
|
|
// copy token
|
|
memcpy(introack->token, token, 32);
|
|
}
|
|
llarp_logic_queue_job(logic, {introack, &inform_verify_introack});
|
|
}
|
|
|
|
void
|
|
handle_generated_introack(void *user)
|
|
{
|
|
iwp_async_introack *introack = static_cast< iwp_async_introack * >(user);
|
|
introack->hook(introack);
|
|
}
|
|
|
|
void
|
|
gen_introack(void *user)
|
|
{
|
|
iwp_async_introack *introack = static_cast< iwp_async_introack * >(user);
|
|
llarp_sharedkey_t sharedkey;
|
|
auto crypto = introack->iwp->crypto;
|
|
auto pubkey = introack->remote_pubkey;
|
|
auto secretkey = introack->secretkey;
|
|
auto nonce = introack->nonce;
|
|
// S = TKE(a.k, b.k, n)
|
|
crypto->transport_dh_server(sharedkey, pubkey, secretkey, nonce);
|
|
|
|
// x = SE(S, token, n[0:24])
|
|
llarp_buffer_t buf;
|
|
buf.base = introack->buf + 64;
|
|
buf.sz = 32;
|
|
buf.cur = buf.base;
|
|
memcpy(buf.base, introack->token, 32);
|
|
crypto->xchacha20(buf, sharedkey, nonce);
|
|
|
|
// h = MDS(n + x + w1, S)
|
|
buf.base = introack->buf + 32;
|
|
buf.sz = introack->sz - 32;
|
|
buf.cur = buf.base;
|
|
crypto->hmac(introack->buf, buf, sharedkey);
|
|
|
|
llarp_logic_queue_job(introack->iwp->logic,
|
|
{introack, &handle_generated_introack});
|
|
}
|
|
|
|
void
|
|
inform_gen_session_start(void *user)
|
|
{
|
|
iwp_async_session_start *session =
|
|
static_cast< iwp_async_session_start * >(user);
|
|
session->hook(session);
|
|
}
|
|
|
|
void
|
|
gen_session_start(void *user)
|
|
{
|
|
iwp_async_session_start *session =
|
|
static_cast< iwp_async_session_start * >(user);
|
|
auto crypto = session->iwp->crypto;
|
|
|
|
auto dh = crypto->transport_dh_client;
|
|
auto shorthash = crypto->shorthash;
|
|
auto hmac = crypto->hmac;
|
|
auto encrypt = crypto->xchacha20;
|
|
|
|
auto logic = session->iwp->logic;
|
|
auto a_sK = session->secretkey;
|
|
auto b_K = session->remote_pubkey;
|
|
auto N = session->nonce;
|
|
auto token = session->token;
|
|
auto K = session->sessionkey;
|
|
|
|
llarp_sharedkey_t e_K;
|
|
llarp_shorthash_t T;
|
|
|
|
byte_t tmp[64];
|
|
llarp_buffer_t buf;
|
|
llarp::StackBuffer< decltype(tmp) >(buf, tmp);
|
|
|
|
// T = HS(token + n)
|
|
memcpy(tmp, token, 32);
|
|
memcpy(tmp + 32, N, 32);
|
|
shorthash(T, buf);
|
|
|
|
// e_K = TKE(a.k, b.k, N)
|
|
dh(e_K, b_K, a_sK, N);
|
|
// K = TKE(a.k, b.k, T)
|
|
dh(K, b_K, a_sK, T);
|
|
|
|
// x = SE(e_K, token, n[0:24])
|
|
buf.base = (session->buf + 32);
|
|
buf.sz = 32;
|
|
memcpy(buf.base, token, 32);
|
|
encrypt(buf, e_K, N);
|
|
|
|
// h = MDS(n + x + w2, e_K)
|
|
buf.base = (session->buf + 32);
|
|
buf.sz = session->sz - 32;
|
|
hmac(session->buf, buf, e_K);
|
|
|
|
// K = TKE(a.k, b.k, T)
|
|
dh(K, b_K, a_sK, T);
|
|
|
|
llarp_logic_queue_job(logic, {user, &inform_gen_session_start});
|
|
}
|
|
}
|
|
|
|
extern "C" {
|
|
|
|
void
|
|
iwp_call_async_keygen(struct llarp_async_iwp *iwp,
|
|
struct iwp_async_keygen *keygen)
|
|
{
|
|
keygen->iwp = iwp;
|
|
llarp_threadpool_queue_job(iwp->worker, {keygen, &iwp::keygen});
|
|
}
|
|
|
|
void
|
|
iwp_call_async_gen_intro(struct llarp_async_iwp *iwp,
|
|
struct iwp_async_intro *intro)
|
|
{
|
|
intro->iwp = iwp;
|
|
llarp_threadpool_queue_job(iwp->worker, {intro, &iwp::gen_intro});
|
|
}
|
|
|
|
void
|
|
iwp_call_async_verify_introack(struct llarp_async_iwp *iwp,
|
|
struct iwp_async_introack *introack)
|
|
{
|
|
introack->iwp = iwp;
|
|
llarp_threadpool_queue_job(iwp->worker, {introack, &iwp::verify_introack});
|
|
}
|
|
|
|
void
|
|
iwp_call_async_gen_session_start(struct llarp_async_iwp *iwp,
|
|
struct iwp_async_session_start *session)
|
|
{
|
|
session->iwp = iwp;
|
|
llarp_threadpool_queue_job(iwp->worker, {session, &iwp::gen_session_start});
|
|
}
|
|
|
|
void
|
|
iwp_call_async_verify_intro(struct llarp_async_iwp *iwp,
|
|
struct iwp_async_intro *intro)
|
|
{
|
|
intro->iwp = iwp;
|
|
llarp_threadpool_queue_job(iwp->worker, {intro, &iwp::verify_intro});
|
|
}
|
|
|
|
void
|
|
iwp_call_async_gen_introack(struct llarp_async_iwp *iwp,
|
|
struct iwp_async_introack *introack)
|
|
{
|
|
introack->iwp = iwp;
|
|
llarp_threadpool_queue_job(iwp->worker, {introack, &iwp::gen_introack});
|
|
}
|
|
|
|
void
|
|
iwp_call_async_frame_decrypt(struct llarp_async_iwp *iwp,
|
|
struct iwp_async_frame *frame)
|
|
{
|
|
}
|
|
|
|
struct llarp_async_iwp *
|
|
llarp_async_iwp_new(struct llarp_alloc *mem, struct llarp_crypto *crypto,
|
|
struct llarp_logic *logic, struct llarp_threadpool *worker)
|
|
{
|
|
llarp_async_iwp *iwp = new llarp_async_iwp;
|
|
if(iwp)
|
|
{
|
|
iwp->mem = mem;
|
|
iwp->crypto = crypto;
|
|
iwp->logic = logic;
|
|
iwp->worker = worker;
|
|
}
|
|
return iwp;
|
|
}
|
|
|
|
void
|
|
llarp_async_iwp_free(struct llarp_async_iwp *iwp)
|
|
{
|
|
delete iwp;
|
|
}
|
|
}
|