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connectd: do decryption for peers.

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We temporarily hack to sync_crypto_write/sync_crypto_read functions to
not do any crypto, and do it all in connectd.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2022-01-08 23:52:29 +10:30
parent 71f736678f
commit a2b3d335bb
5 changed files with 95 additions and 93 deletions
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34
common/crypto_sync.c
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@@ -12,6 +12,8 @@
#include <netinet/tcp.h>
#include <sys/socket.h>
#include <wire/wire.h>
#include <wire/wire_io.h>
#include <wire/wire_sync.h>
void sync_crypto_write(struct per_peer_state *pps, const void *msg TAKES)
{
@@ -19,10 +21,8 @@ void sync_crypto_write(struct per_peer_state *pps, const void *msg TAKES)
bool post_sabotage = false, post_close;
int type = fromwire_peektype(msg);
#endif
u8 *enc;
status_peer_io(LOG_IO_OUT, NULL, msg);
enc = cryptomsg_encrypt_msg(NULL, &pps->cs, msg);
#if DEVELOPER
switch (dev_disconnect(type)) {
@@ -44,9 +44,8 @@ void sync_crypto_write(struct per_peer_state *pps, const void *msg TAKES)
break;
}
#endif
if (!write_all(pps->peer_fd, enc, tal_count(enc)))
if (!wire_sync_write(pps->peer_fd, msg))
peer_failed_connection_lost();
tal_free(enc);
#if DEVELOPER
if (post_sabotage)
@@ -101,32 +100,11 @@ void sync_crypto_write_no_delay(struct per_peer_state *pps,
u8 *sync_crypto_read(const tal_t *ctx, struct per_peer_state *pps)
{
u8 hdr[18], *enc, *dec;
u16 len;
if (!read_all(pps->peer_fd, hdr, sizeof(hdr))) {
status_debug("Failed reading header: %s", strerror(errno));
peer_failed_connection_lost();
}
if (!cryptomsg_decrypt_header(&pps->cs, hdr, &len)) {
status_debug("Failed hdr decrypt with rn=%"PRIu64,
pps->cs.rn-1);
peer_failed_connection_lost();
}
enc = tal_arr(ctx, u8, len + 16);
if (!read_all(pps->peer_fd, enc, tal_count(enc))) {
status_debug("Failed reading body: %s", strerror(errno));
peer_failed_connection_lost();
}
dec = cryptomsg_decrypt_body(ctx, &pps->cs, enc);
tal_free(enc);
u8 *dec = wire_sync_read(ctx, pps->peer_fd);
if (!dec)
peer_failed_connection_lost();
else
status_peer_io(LOG_IO_IN, NULL, dec);
status_peer_io(LOG_IO_IN, NULL, dec);
return dec;
}