Spiped 介绍
Spiped (发音 “ess-pipe-dee”) is a utility for creating symmetrically encrypted
and authenticated pipes between socket addresses, so that one may connect to
one address (e.g., a UNIX socket on localhost) and transparently have a
connection established to another address (e.g., a UNIX socket on a different
system). This is similar to ‘ssh -L’ functionality, but does not use SSH and
requires a pre-shared symmetric key.
Spiped uses strong and well-understood cryptographic components: The initial
key negotiation is performed using HMAC-SHA256 and an authenticated Diffie-
Hellman key exchange over the standard 2048-bit “group 14”; following the
completion of key negotiation, packets are transmitted encrypted with AES-256
in CTR mode and authenticated using HMAC-SHA256. The simplicity of the code —
about 4000 lines of C code in total, of which under 1000 are specific to
spiped (the rest is library code originating from
kivaloo and
Tarsnap) — makes it unlikely that spiped
has any security vulnerabilities.
On the author’s 2.5 GHz Intel Core 2 laptop, spiped operates at approximately
200 Mbps