我很困惑。过去 15 分钟里我读过的每一本手册都告诉我这应该可行，但事实并非如此：
$ ssh-agent -s
SSH_AUTH_SOCK=/tmp/ssh-syXn9Tk09V9P/agent.16332; export SSH_AUTH_SOCK;
SSH_AGENT_PID=16333; export SSH_AGENT_PID;
echo Agent pid 16333;
$ eval `ssh-agent -s`
Agent pid 16362
$ ssh-add -l
The agent has no identities.
$ ssh-add .ssh/user\@server.de.key
Enter passphrase for .ssh/[email protected]:
Identity added: .ssh/[email protected] (.ssh/[email protected])
$ ssh-add -l
1023 SHA256:TQ6nDwMeeP9tHf43lAG0mC5cbIPx5h7RYxMUcYKJHPI .ssh/[email protected] (RSA)
$ ssh server.de
Enter passphrase for key '/home/iras/.ssh/[email protected]':
在 ssh 配置中，有一个 server.de 条目，其中包含身份用户和提供的 ssh 密钥。
详细输出：
$ ssh -vvv server.de
OpenSSH_7.2p2, OpenSSL 1.0.2h 3 May 2016
debug1: Reading configuration data /home/iras/.ssh/config
debug1: /home/iras/.ssh/config line 127: Applying options for apache4
debug1: /home/iras/.ssh/config line 177: Applying options for *
debug1: Reading configuration data /etc/ssh/ssh_config
debug2: resolving "10.0.0.42" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to 10.0.0.42 [10.0.0.42] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /home/iras/.ssh/[email protected] type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/iras/.ssh/[email protected] type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.2
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3 pat OpenSSH_6.6.1* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 10.0.0.42:22 as 'user'
debug3: hostkeys_foreach: reading file "/home/iras/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/iras/.ssh/known_hosts:69
debug3: load_hostkeys: loaded 1 keys from 10.0.0.42
debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected],zlib
debug2: compression stoc: none,[email protected],zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: [email protected],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: host key algorithms: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: compression ctos: none,[email protected]
debug2: compression stoc: none,[email protected]
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: [email protected]
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:KAU//7qfeZspCpZwJWB7tZdYqQkGwUHVMV+830TdTwE
debug3: hostkeys_foreach: reading file "/home/iras/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/iras/.ssh/known_hosts:69
debug3: load_hostkeys: loaded 1 keys from 10.0.0.42
debug1: Host '10.0.0.42' is known and matches the ECDSA host key.
debug1: Found key in /home/iras/.ssh/known_hosts:69
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug2: set_newkeys: mode 0
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS received
debug2: key: /home/iras/.ssh/[email protected] ((nil)), explicit
debug3: send packet: type 5
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
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/iras/.ssh/[email protected]
Enter passphrase for key '/home/iras/.ssh/[email protected]':
答案1
问题是，您已在中明确指定了密钥~/.ssh/config，但您没有存储其他（未加密）公钥。因此，客户端首先尝试配置文件中列出的密钥，然后再尝试代理密钥（无法匹配它们，因为显式密钥已加密）。
如果我的理论是正确的，它应该对你有用，如果你从中删除该行，或者将公钥导出到IdentityFile ~.ssh/[email protected]~/.ssh/config.ssh/[email protected]
ssh-keygen -yf .ssh/[email protected] > .ssh/[email protected]