146 lines
4.1 KiB
Nim
146 lines
4.1 KiB
Nim
## Nim-LibP2P
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## Copyright (c) 2019 Status Research & Development GmbH
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## Licensed under either of
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## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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## * MIT license ([LICENSE-MIT](LICENSE-MIT))
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## at your option.
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## This file may not be copied, modified, or distributed except according to
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## those terms.
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import std/[options, strformat]
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import chronos, chronicles, bearssl
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import ../protocol,
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../../stream/streamseq,
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../../stream/connection,
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../../multiaddress,
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../../peerinfo
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export protocol
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logScope:
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topics = "secure"
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type
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Secure* = ref object of LPProtocol # base type for secure managers
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SecureConn* = ref object of Connection
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stream*: Connection
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buf: StreamSeq
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func shortLog*(conn: SecureConn): auto =
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if conn.isNil: "SecureConn(nil)"
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elif conn.peerInfo.isNil: $conn.oid
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else: &"{shortLog(conn.peerInfo.peerId)}:{conn.oid}"
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chronicles.formatIt(SecureConn): shortLog(it)
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proc init*(T: type SecureConn,
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conn: Connection,
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peerInfo: PeerInfo,
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observedAddr: Multiaddress,
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timeout: Duration = DefaultConnectionTimeout): T =
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result = T(stream: conn,
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peerInfo: peerInfo,
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observedAddr: observedAddr,
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closeEvent: conn.closeEvent,
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timeout: timeout)
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result.initStream()
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method initStream*(s: SecureConn) =
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if s.objName.len == 0:
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s.objName = "SecureConn"
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procCall Connection(s).initStream()
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method close*(s: SecureConn) {.async.} =
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if not(isNil(s.stream)):
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await s.stream.close()
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await procCall Connection(s).close()
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method readMessage*(c: SecureConn): Future[seq[byte]] {.async, base.} =
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doAssert(false, "Not implemented!")
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method handshake(s: Secure,
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conn: Connection,
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initiator: bool): Future[SecureConn] {.async, base.} =
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doAssert(false, "Not implemented!")
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proc handleConn*(s: Secure,
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conn: Connection,
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initiator: bool): Future[Connection] {.async, gcsafe.} =
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var sconn = await s.handshake(conn, initiator)
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proc cleanup() {.async.} =
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try:
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await conn.join()
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await sconn.close()
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except CancelledError:
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# This is top-level procedure which will work as separate task, so it
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# do not need to propogate CancelledError.
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discard
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except CatchableError as exc:
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trace "error cleaning up secure connection", err = exc.msg, sconn
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if not isNil(sconn):
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# All the errors are handled inside `cleanup()` procedure.
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asyncSpawn cleanup()
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return sconn
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method init*(s: Secure) {.gcsafe.} =
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procCall LPProtocol(s).init()
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proc handle(conn: Connection, proto: string) {.async, gcsafe.} =
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trace "handling connection upgrade", proto, conn
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try:
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# We don't need the result but we
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# definitely need to await the handshake
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discard await s.handleConn(conn, false)
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trace "connection secured", conn
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except CancelledError as exc:
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warn "securing connection canceled", conn
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await conn.close()
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raise exc
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except CatchableError as exc:
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warn "securing connection failed", err = exc.msg, conn
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await conn.close()
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s.handler = handle
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method secure*(s: Secure,
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conn: Connection,
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initiator: bool):
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Future[Connection] {.base, gcsafe.} =
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s.handleConn(conn, initiator)
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method readOnce*(s: SecureConn,
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pbytes: pointer,
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nbytes: int):
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Future[int] {.async, gcsafe.} =
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doAssert(nbytes > 0, "nbytes must be positive integer")
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if s.buf.data().len() == 0:
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let (buf, err) = try:
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(await s.readMessage(), nil)
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except CatchableError as exc:
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(@[], exc)
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if not isNil(err):
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if not (err of LPStreamEOFError):
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warn "error while reading message from secure connection, closing.",
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error=err.name,
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message=err.msg,
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connection=s
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await s.close()
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raise err
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s.activity = true
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if buf.len == 0:
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raise newLPStreamIncompleteError()
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s.buf.add(buf)
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var p = cast[ptr UncheckedArray[byte]](pbytes)
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return s.buf.consumeTo(toOpenArray(p, 0, nbytes - 1))
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