私は OTP ssh デーモンの実装の動作に少し混乱しており、誰かが私のために物事を解決してくれるのではないかと思っています。予選; 次のプログラムがあります。
-module(sshd).
-export([start/0, stop/1]).
-spec start() -> {ok, ssh:ssh_daemon_ref()} | {error, atom()}.
start() ->
_ = application:start(crypto),
_ = application:start(ssh),
Opts = [
{system_dir, "/etc/erl_sshd/"},
{pwdfun, fun passwd/2}
],
ssh:daemon(2222, Opts).
-spec stop(ssh:ssh_daemon_ref()) -> ok.
stop(Ref) ->
ssh:stop_daemon(Ref).
%% ===================================================================
%% Internal Functions
%% ===================================================================
-spec passwd(User::string(), Password::string()) -> boolean().
passwd(User, User) ->
true;
passwd(_User, _Password) ->
false.
/tmp/erl_sshd次のようにディスク上に作成しました。
> mkdir /tmp/erl_sshd
> ssh-keygen -t rsa -f /tmp/erl_sshd/ssh_host_rsa_key
Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /tmp/erl_sshd/ssh_host_rsa_key.
Your public key has been saved in /tmp/erl_sshd/ssh_host_rsa_key.pub.
The key fingerprint is:
...
OpenSSHd でのテスト:
> /usr/sbin/sshd -p 2222 -h /tmp/erl_sshd/ssh_host_rsa_key -d
debug1: sshd version OpenSSH_5.6p1
debug1: read PEM private key done: type RSA
debug1: private host key: #0 type 1 RSA
debug1: setgroups() failed: Operation not permitted
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-p'
debug1: rexec_argv[2]='2222'
debug1: rexec_argv[3]='-h'
debug1: rexec_argv[4]='/tmp/erl_sshd/ssh_host_rsa_key'
debug1: rexec_argv[5]='-d'
debug1: Bind to port 2222 on 0.0.0.0.
Server listening on 0.0.0.0 port 2222.
debug1: Bind to port 2222 on ::.
Server listening on :: port 2222.
問題なくプロンプトを表示できます。
> ssh localhost -p 2222 -v
OpenSSH_5.6p1, OpenSSL 0.9.8r 8 Feb 2011
debug1: Reading configuration data /etc/ssh_config
debug1: Applying options for *
debug1: Applying options for *
debug1: Connecting to localhost [::1] port 2222.
debug1: Connection established.
debug1: identity file /Users/blt/.ssh/id_rsa type 1
debug1: identity file /Users/blt/.ssh/id_rsa-cert type -1
debug1: identity file /Users/blt/.ssh/id_dsa type -1
debug1: identity file /Users/blt/.ssh/id_dsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.6
debug1: match: OpenSSH_5.6 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.6
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: checking without port identifier
The authenticity of host '[localhost]:2222 ([::1]:2222)' can't be established.
RSA key fingerprint is 01:0e:c6:0b:f4:48:ab:0a:49:2a:66:38:27:67:8f:52.
Are you sure you want to continue connecting (yes/no)? ^C
ただし、erlang sshd を起動すると、次のようになります。
> erl
Erlang R15B03 (erts-5.9.3) [source] [64-bit] [smp:8:8] [async-threads:0] [hipe] [kernel-poll:false]
Eshell V5.9.3 (abort with ^G)
1> c(sshd), {ok, Ref} = sshd:start().
{ok,<0.49.0>}
2>
運がない:
> ssh localhost -p 2222 -v
OpenSSH_5.6p1, OpenSSL 0.9.8r 8 Feb 2011
debug1: Reading configuration data /etc/ssh_config
debug1: Applying options for *
debug1: Applying options for *
debug1: Connecting to localhost [::1] port 2222.
debug1: Connection established.
debug1: identity file /Users/blt/.ssh/id_rsa type 1
debug1: identity file /Users/blt/.ssh/id_rsa-cert type -1
debug1: identity file /Users/blt/.ssh/id_dsa type -1
debug1: identity file /Users/blt/.ssh/id_dsa-cert type -1
debug1: Remote protocol version 2.0, remote software version Erlang
debug1: no match: Erlang
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.6
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-sha1 none
debug1: kex: client->server aes128-cbc hmac-sha1 none
no hostkey alg
ユーザーの作成は別として、ユーザー ガイドで概説されているのと同じ手順を実行し、この質問と同じ根拠を取り上げました。私はOS Xシステムを使用しています：
> sw_vers
ProductName: Mac OS X
ProductVersion: 10.7.5
BuildVersion: 11G63
root ユーザーとして erlang シェルを実行し、すべてにリダイレクトsystem_dirすると、期待どおりに動作します。/etc何が起きているのか他の人には明らかですか？おそらく/tmp/erl_sshd、erlang が黙ってエラーを出しているディレクトリのユーザー権限でしょうか? 私は以前に sasl アプリケーションをオンにしていましたが、出力に関連するものは何もありませんでした。