python - OpenSSH 公钥不适用于 Cygwin

Question

我在使用公钥身份验证的 Windows 版 OpenSSH 时遇到问题。我已经生成 key 对并将 key 正确传输到远程服务器，但是当我在 Windows 上使用 ssh 时，它一直提示输入密码。我将相同的私钥传输到我的 mac 并出现错误，权限太开放 (644)，除非将其设置为 600，否则将被忽略。“chmod 600 id_rsa”和 boom，它起作用了。我似乎无法找到一种方法来通过脚本在 Windows 上更改此设置，但我无法使用 gui 执行此操作。

一定有一种简单的方法可以做到这一点，对吗？是否有内置的 Windows 命令？我目前使用的是 XP，但需要它才能在 vista 和 7 上工作。

Edit3: 我放弃了 FAT32 支持并下载了完整的 cygwin 安装，只是为了帮助诊断问题，并使用 chmod 600 设置权限(幸运的是设置了 windows 等效项)。还是失败了。所以我猜问题不是权限，而是导致 key 失败的其他原因。

编辑 2:我设法找到了一个可以满足我需要的 cacls 命令，但它显然只能在 NTFS 文件系统上运行，而且我需要支持 FAT32。

Edit1:当我在 3x verbose 模式下运行 openSSH 时，这是我得到的:

OpenSSH_3.8.1p1, OpenSSL 0.9.7d 17 Mar 2004
debug2: ssh_connect: needpriv 0
debug1: Connecting to SERVER.NAME.HERE.CA [134.153.48.1] port 22.
debug1: Connection established.
debug1: identity file /home/jtg733/.ssh/identity type -1
debug3: Not a RSA1 key file /home/jtg733/.ssh/id_rsa.
debug2: key_type_from_name: unknown key type '-----BEGIN'
debug3: key_read: missing keytype
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug2: key_type_from_name: unknown key type '-----END'
debug3: key_read: missing keytype
debug1: identity file /home/jtg733/.ssh/id_rsa type 1
debug1: identity file /home/jtg733/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1-hpn13v11lpk
debug1: match: OpenSSH_5.9p1-hpn13v11lpk pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.8.1p1
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-  group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: kex_parse_kexinit: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour,aes192-cbc,aes256-cbc,aes128-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour,aes192-cbc,aes256-cbc,aes128-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: mac_init: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug2: mac_init: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug2: dh_gen_key: priv key bits set: 127/256
debug2: bits set: 534/1024
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: check_host_in_hostfile: filename /home/jtg733/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 2
debug3: check_host_in_hostfile: filename /home/jtg733/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 3
debug1: Host 'SERVER.NAME.HERE.CA' is known and matches the RSA host key.
debug1: Found key in /home/jtg733/.ssh/known_hosts:2
debug2: bits set: 522/1024
debug1: ssh_rsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /home/jtg733/.ssh/identity (0x0)
debug2: key: /home/jtg733/.ssh/id_rsa (0x100e9cb8)
debug2: key: /home/jtg733/.ssh/id_dsa (0x0)
debug1: Authentications that can continue: publickey,password,hostbased
debug3: start over, passed a different list publickey,password,hostbased
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/jtg733/.ssh/identity
debug3: no such identity: /home/jtg733/.ssh/identity
debug1: Offering public key: /home/jtg733/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password,hostbased
debug1: Trying private key: /home/jtg733/.ssh/id_dsa
debug3: no such identity: /home/jtg733/.ssh/id_dsa
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password

所以看起来是拿到了 key ，发送了测试包，然后就直接跳转到下一轮认证了。

Answer 1

出于某种原因，在服务器端生成 key ，然后使用 scp 将服务器生成的 private key 从服务器复制到 Windows 框上，然后使用 cygwin chmod 600 非常有效。

我仍然不知道为什么服务器不接受 windows 公钥但 windows 会接受服务器的私钥。对我来说就像计算机巫毒教。