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common/cryptomsg: remove unused async routines. 

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell 6 years ago
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a1bdaa8f99
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a24ed20dee
3 changed files with 58 additions and 263 deletions
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  1. 142
      common/cryptomsg.c
  2. 31
      common/cryptomsg.h
  3. 142
      common/test/run-cryptomsg.c

142
common/cryptomsg.c
View File

@ -126,40 +126,6 @@ u8 *cryptomsg_decrypt_body(const tal_t *ctx,
return decrypted;
}
static struct io_plan *peer_decrypt_body(struct io_conn *conn,
struct peer_crypto_state *pcs)
{
struct io_plan *plan;
u8 *in, *decrypted;
decrypted = cryptomsg_decrypt_body(pcs->in, &pcs->cs, pcs->in);
if (!decrypted)
return io_close(conn);
status_peer_io(LOG_IO_IN, decrypted);
/* BOLT #1:
*
* A receiving node:
* - upon receiving a message of _odd_, unknown type:
* - MUST ignore the received message.
*/
if (unlikely(is_unknown_msg_discardable(decrypted))) {
pcs->in = tal_free(pcs->in);
return peer_read_message(conn, pcs, pcs->next_in);
}
/* Steal cs->in: we free it after, and decrypted too unless
* they steal but be careful not to touch anything after
* next_in (could free itself) */
in = tal_steal(NULL, pcs->in);
pcs->in = NULL;
plan = pcs->next_in(conn, pcs->peer, decrypted);
tal_free(in);
return plan;
}
bool cryptomsg_decrypt_header(struct crypto_state *cs, u8 hdr[18], u16 *lenp)
{
unsigned char npub[crypto_aead_chacha20poly1305_ietf_NPUBBYTES];
@ -190,54 +156,6 @@ bool cryptomsg_decrypt_header(struct crypto_state *cs, u8 hdr[18], u16 *lenp)
return true;
}
static struct io_plan *peer_decrypt_header(struct io_conn *conn,
struct peer_crypto_state *pcs)
{
u16 len;
if (!cryptomsg_decrypt_header(&pcs->cs, pcs->in, &len))
return io_close(conn);
tal_free(pcs->in);
/* BOLT #8:
*
* 4. Read _exactly_ `l+16` bytes from the network buffer, and let
* the bytes be known as `c`.
*/
pcs->in = tal_arr(conn, u8, (u32)len + 16);
return io_read(conn, pcs->in, tal_count(pcs->in), peer_decrypt_body,
pcs);
}
struct io_plan *peer_read_message(struct io_conn *conn,
struct peer_crypto_state *pcs,
struct io_plan *(*next)(struct io_conn *,
struct peer *,
u8 *msg))
{
assert(!pcs->in);
/* BOLT #8:
*
* ### Receiving and Decrypting Messages
*
* In order to decrypt the _next_ message in the network
* stream, the following steps are completed:
*
* 1. Read _exactly_ 18 bytes from the network buffer.
*/
pcs->in = tal_arr(conn, u8, 18);
pcs->next_in = next;
return io_read(conn, pcs->in, 18, peer_decrypt_header, pcs);
}
static struct io_plan *peer_write_done(struct io_conn *conn,
struct peer_crypto_state *pcs)
{
pcs->out = tal_free(pcs->out);
return pcs->next_out(conn, pcs->peer);
}
u8 *cryptomsg_encrypt_msg(const tal_t *ctx,
struct crypto_state *cs,
const u8 *msg TAKES)
@ -324,63 +242,3 @@ u8 *cryptomsg_encrypt_msg(const tal_t *ctx,
tal_free(msg);
return out;
}
#if DEVELOPER
static struct io_plan *peer_write_postclose(struct io_conn *conn,
struct peer_crypto_state *pcs)
{
pcs->out = tal_free(pcs->out);
dev_sabotage_fd(io_conn_fd(conn));
return pcs->next_out(conn, pcs->peer);
}
#endif
struct io_plan *peer_write_message(struct io_conn *conn,
struct peer_crypto_state *pcs,
const u8 *msg,
struct io_plan *(*next)(struct io_conn *,
struct peer *))
{
struct io_plan *(*post)(struct io_conn *, struct peer_crypto_state *);
#if DEVELOPER
int type = fromwire_peektype(msg);
#endif
assert(!pcs->out);
/* Important: this doesn't take msg! */
status_peer_io(LOG_IO_OUT, msg);
pcs->out = cryptomsg_encrypt_msg(conn, &pcs->cs, msg);
pcs->next_out = next;
post = peer_write_done;
#if DEVELOPER
switch (dev_disconnect(type)) {
case DEV_DISCONNECT_BEFORE:
dev_sabotage_fd(io_conn_fd(conn));
break;
case DEV_DISCONNECT_DROPPKT:
pcs->out = NULL; /* FALL THRU */
case DEV_DISCONNECT_AFTER:
post = peer_write_postclose;
break;
case DEV_DISCONNECT_BLACKHOLE:
dev_blackhole_fd(io_conn_fd(conn));
break;
case DEV_DISCONNECT_NORMAL:
break;
}
#endif /* DEVELOPER */
/* BOLT #8:
* 5. Send `lc || c` over the network buffer.
*/
return io_write(conn, pcs->out, tal_count(pcs->out), post, pcs);
}
void init_peer_crypto_state(struct peer *peer, struct peer_crypto_state *pcs)
{
pcs->peer = peer;
pcs->out = pcs->in = NULL;
}

31
common/cryptomsg.h
View File

@ -5,37 +5,6 @@
#include <ccan/tal/tal.h>
#include <common/crypto_state.h>
struct io_conn;
struct peer;
struct peer_crypto_state {
struct crypto_state cs;
/* Peer who owns us: peer->crypto_state == this */
struct peer *peer;
/* Output and input buffers. */
u8 *out, *in;
struct io_plan *(*next_in)(struct io_conn *, struct peer *, u8 *);
struct io_plan *(*next_out)(struct io_conn *, struct peer *);
};
/* Initializes peer->cs (still need to read in cs->cs) */
void init_peer_crypto_state(struct peer *peer, struct peer_crypto_state *pcs);
/* Get decrypted message: ignores unknown odd messages. */
struct io_plan *peer_read_message(struct io_conn *conn,
struct peer_crypto_state *cs,
struct io_plan *(*next)(struct io_conn *,
struct peer *,
u8 *msg));
/* Sends message: frees if taken(msg). */
struct io_plan *peer_write_message(struct io_conn *conn,
struct peer_crypto_state *cs,
const u8 *msg,
struct io_plan *(*next)(struct io_conn *,
struct peer *));
/* BOLT #8:
*
* ### Receiving and Decrypting Messages

142
common/test/run-cryptomsg.c
View File

@ -7,35 +7,6 @@
#include <wire/peer_wire.h>
#include <wire/wire_io.h>
#undef io_read
#undef io_write
static char *read_buf;
static size_t read_buf_len;
static void do_read(void *buf, size_t len)
{
assert(len <= read_buf_len);
memcpy(buf, read_buf, len);
read_buf += len;
read_buf_len -= len;
}
#define io_read(conn, p, len, next, arg) \
(do_read((p), (len)), (next)((conn), (arg)), NULL)
static char *write_buf;
static void do_write(const void *buf, size_t len)
{
size_t oldlen = tal_count(write_buf);
tal_resize(&write_buf, oldlen + len);
memcpy(write_buf + oldlen, buf, len);
}
#define io_write(conn, p, len, next, arg) \
(do_write((p), (len)), (next)((conn), (arg)), NULL)
void status_fmt(enum log_level level UNUSED, const char *fmt, ...)
{
va_list ap;
@ -46,49 +17,8 @@ void status_fmt(enum log_level level UNUSED, const char *fmt, ...)
va_end(ap);
}
void status_peer_io(enum log_level dir UNUSED, const u8 *msg UNUSED)
{
}
#if DEVELOPER
/* AUTOGENERATED MOCKS START */
/* Generated stub for dev_blackhole_fd */
void dev_blackhole_fd(int fd UNNEEDED)
{ fprintf(stderr, "dev_blackhole_fd called!\n"); abort(); }
/* Generated stub for dev_sabotage_fd */
void dev_sabotage_fd(int fd UNNEEDED)
{ fprintf(stderr, "dev_sabotage_fd called!\n"); abort(); }
/* AUTOGENERATED MOCKS END */
enum dev_disconnect dev_disconnect(int pkt_type UNUSED)
{
return DEV_DISCONNECT_NORMAL;
}
#endif /* DEVELOPER */
/* We test what look like unknown messages. */
#define is_unknown_msg_discardable(x) 0
#define fromwire_peektype(msg) 0
#include "../cryptomsg.c"
const void *trc;
static struct io_plan *check_msg_write(struct io_conn *conn UNUSED, struct peer *peer UNUSED)
{
assert(tal_count(write_buf) == 2 + 16 + 5 + 16);
return NULL;
}
static struct io_plan *check_msg_read(struct io_conn *conn UNUSED, struct peer *peer UNUSED,
u8 *msg)
{
assert(tal_count(msg) == 5);
assert(memcmp(msg, "hello", 5) == 0);
return NULL;
}
static struct secret secret_from_hex(const char *hex)
{
struct secret secret;
@ -98,11 +28,16 @@ static struct secret secret_from_hex(const char *hex)
return secret;
}
static void check_result(const u8 *msg, const char *hex)
{
assert(streq(hex, tal_hex(tmpctx, msg)));
}
int main(void)
{
setup_locale();
struct peer_crypto_state cs_out, cs_in;
struct crypto_state cs_out, cs_in;
struct secret sk, rk, ck;
const void *msg;
size_t i;
@ -125,27 +60,60 @@ int main(void)
sk = secret_from_hex("0x969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9");
rk = secret_from_hex("0xbb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442");
cs_out.cs.sn = cs_out.cs.rn = cs_in.cs.sn = cs_in.cs.rn = 0;
cs_out.cs.sk = cs_in.cs.rk = sk;
cs_out.cs.rk = cs_in.cs.sk = rk;
cs_out.cs.s_ck = cs_out.cs.r_ck = cs_in.cs.s_ck = cs_in.cs.r_ck = ck;
init_peer_crypto_state((void *)tmpctx, &cs_in);
init_peer_crypto_state((void *)tmpctx, &cs_out);
cs_out.sn = cs_out.rn = cs_in.sn = cs_in.rn = 0;
cs_out.sk = cs_in.rk = sk;
cs_out.rk = cs_in.sk = rk;
cs_out.s_ck = cs_out.r_ck = cs_in.s_ck = cs_in.r_ck = ck;
for (i = 0; i < 1002; i++) {
write_buf = tal_arr(tmpctx, char, 0);
u8 *dec, *enc;
u16 len;
peer_write_message(NULL, &cs_out, msg, check_msg_write);
if ((i % 500) < 2)
status_trace("output %zu: 0x%s", i,
tal_hex(tmpctx, write_buf));
enc = cryptomsg_encrypt_msg(tmpctx, &cs_out, msg);
/* BOLT #8:
*
* output 0: 0xcf2b30ddf0cf3f80e7c35a6e6730b59fe802473180f396d88a8fb0db8cbcf25d2f214cf9ea1d95
*/
if (i == 0)
check_result(enc, "cf2b30ddf0cf3f80e7c35a6e6730b59fe802473180f396d88a8fb0db8cbcf25d2f214cf9ea1d95");
/* BOLT #8:
*
* output 1: 0x72887022101f0b6753e0c7de21657d35a4cb2a1f5cde2650528bbc8f837d0f0d7ad833b1a256a1
*/
if (i == 1)
check_result(enc, "72887022101f0b6753e0c7de21657d35a4cb2a1f5cde2650528bbc8f837d0f0d7ad833b1a256a1");
/* BOLT #8:
*
* output 500: 0x178cb9d7387190fa34db9c2d50027d21793c9bc2d40b1e14dcf30ebeeeb220f48364f7a4c68bf8
* output 501: 0x1b186c57d44eb6de4c057c49940d79bb838a145cb528d6e8fd26dbe50a60ca2c104b56b60e45bd
*/
if (i == 500)
check_result(enc, "178cb9d7387190fa34db9c2d50027d21793c9bc2d40b1e14dcf30ebeeeb220f48364f7a4c68bf8");
if (i == 501)
check_result(enc, "1b186c57d44eb6de4c057c49940d79bb838a145cb528d6e8fd26dbe50a60ca2c104b56b60e45bd");
/* BOLT #8:
*
* output 1000: 0x4a2f3cc3b5e78ddb83dcb426d9863d9d9a723b0337c89dd0b005d89f8d3c05c52b76b29b740f09
* output 1001: 0x2ecd8c8a5629d0d02ab457a0fdd0f7b90a192cd46be5ecb6ca570bfc5e268338b1a16cf4ef2d36
*/
if (i == 1000)
check_result(enc, "4a2f3cc3b5e78ddb83dcb426d9863d9d9a723b0337c89dd0b005d89f8d3c05c52b76b29b740f09");
if (i == 1001)
check_result(enc, "2ecd8c8a5629d0d02ab457a0fdd0f7b90a192cd46be5ecb6ca570bfc5e268338b1a16cf4ef2d36");
if (!cryptomsg_decrypt_header(&cs_in, enc, &len))
abort();
read_buf = write_buf;
read_buf_len = tal_count(read_buf);
write_buf = tal_arr(tmpctx, char, 0);
/* Trim header */
memmove(enc, enc + CRYPTOMSG_HDR_SIZE,
tal_bytelen(enc) - CRYPTOMSG_HDR_SIZE);
tal_resize(&enc, tal_bytelen(enc) - CRYPTOMSG_HDR_SIZE);
peer_read_message(NULL, &cs_in, check_msg_read);
assert(read_buf_len == 0);
dec = cryptomsg_decrypt_body(enc, &cs_in, enc);
assert(memeq(dec, tal_bytelen(dec), msg, tal_bytelen(msg)));
}
tal_free(tmpctx);
return 0;

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