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Message-ID: <5329B9D0.6070703@cornell.edu> Date: Wed, 19 Mar 2014 11:37:52 -0400 From: Ken Brown User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: cygwin Subject: Public key authorization problem with latest snapshot Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Here's some more weirdness involving the recent changes to exception handling on 64-bit Cygwin. I have an ordinary user kbrown and an administrator user kbrown-admin. I use the following command to simulate "su": ssh kbrown-admin@$(hostname) . With the current (2014-03-18) x86_64 snapshot, this doesn't work if I try to use public key authorization. I simply get a message Connection closed by fe80::81db:bf3a:6434:6015%11 and I'm not even prompted for my passphrase [*]. But if I move my id_rsa and id_rsa.pub out of the way, I'm prompted for a password, and I can login successfully. Reverting to the 2014-03-17 snapshot fixes the problem. Ken [*] Here's the result of using ssh -vv, in case it provides a clue: OpenSSH_6.6, OpenSSL 1.0.1f 6 Jan 2014 debug1: Reading configuration data /home/kbrown/.ssh/config debug1: Reading configuration data /etc/ssh_config debug2: ssh_connect: needpriv 0 debug1: Connecting to desktop-new [fe80::81db:bf3a:6434:6015%11] port 22. debug1: Connection established. debug1: identity file /home/kbrown/.ssh/id_rsa type 1 debug1: identity file /home/kbrown/.ssh/id_rsa-cert type -1 debug1: identity file /home/kbrown/.ssh/id_dsa type -1 debug1: identity file /home/kbrown/.ssh/id_dsa-cert type -1 debug1: identity file /home/kbrown/.ssh/id_ecdsa type -1 debug1: identity file /home/kbrown/.ssh/id_ecdsa-cert type -1 debug1: identity file /home/kbrown/.ssh/id_ed25519 type -1 debug1: identity file /home/kbrown/.ssh/id_ed25519-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.6 debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6 debug1: match: OpenSSH_6.6 pat OpenSSH* compat 0x04000000 debug2: fd 3 setting O_NONBLOCK debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: curve25519-sha256 AT libssh DOT org,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: ecdsa-sha2-nistp256-cert-v01 AT openssh DOT com,ecdsa-sha2-nistp384-cert-v01 AT openssh DOT com,ecdsa-sha2-nistp521-cert-v01 AT openssh DOT com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01 AT openssh DOT com,ssh-rsa-cert-v01 AT openssh DOT com,ssh-dss-cert-v01 AT openssh DOT com,ssh-rsa-cert-v00 AT openssh DOT com,ssh-dss-cert-v00 AT openssh DOT com,ssh-ed25519,ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm AT openssh DOT com,aes256-gcm AT openssh DOT com,chacha20-poly1305 AT openssh DOT com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc AT lysator DOT liu DOT se debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm AT openssh DOT com,aes256-gcm AT openssh DOT com,chacha20-poly1305 AT openssh DOT com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc AT lysator DOT liu DOT se debug2: kex_parse_kexinit: hmac-md5-etm AT openssh DOT com,hmac-sha1-etm AT openssh DOT com,umac-64-etm AT openssh DOT com,umac-128-etm AT openssh DOT com,hmac-sha2-256-etm AT openssh DOT com,hmac-sha2-512-etm AT openssh DOT com,hmac-ripemd160-etm AT openssh DOT com,hmac-sha1-96-etm AT openssh DOT com,hmac-md5-96-etm AT openssh DOT com,hmac-md5,hmac-sha1,umac-64 AT openssh DOT com,umac-128 AT openssh DOT com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160 AT openssh DOT com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5-etm AT openssh DOT com,hmac-sha1-etm AT openssh DOT com,umac-64-etm AT openssh DOT com,umac-128-etm AT openssh DOT com,hmac-sha2-256-etm AT openssh DOT com,hmac-sha2-512-etm AT openssh DOT com,hmac-ripemd160-etm AT openssh DOT com,hmac-sha1-96-etm AT openssh DOT com,hmac-md5-96-etm AT openssh DOT com,hmac-md5,hmac-sha1,umac-64 AT openssh DOT com,umac-128 AT openssh DOT com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160 AT openssh DOT com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib AT openssh DOT com,zlib debug2: kex_parse_kexinit: none,zlib AT openssh DOT com,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: curve25519-sha256 AT libssh DOT org,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,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519 debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm AT openssh DOT com,aes256-gcm AT openssh DOT com,chacha20-poly1305 AT openssh DOT com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc AT lysator DOT liu DOT se debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm AT openssh DOT com,aes256-gcm AT openssh DOT com,chacha20-poly1305 AT openssh DOT com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc AT lysator DOT liu DOT se debug2: kex_parse_kexinit: hmac-md5-etm AT openssh DOT com,hmac-sha1-etm AT openssh DOT com,umac-64-etm AT openssh DOT com,umac-128-etm AT openssh DOT com,hmac-sha2-256-etm AT openssh DOT com,hmac-sha2-512-etm AT openssh DOT com,hmac-ripemd160-etm AT openssh DOT com,hmac-sha1-96-etm AT openssh DOT com,hmac-md5-96-etm AT openssh DOT com,hmac-md5,hmac-sha1,umac-64 AT openssh DOT com,umac-128 AT openssh DOT com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160 AT openssh DOT com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5-etm AT openssh DOT com,hmac-sha1-etm AT openssh DOT com,umac-64-etm AT openssh DOT com,umac-128-etm AT openssh DOT com,hmac-sha2-256-etm AT openssh DOT com,hmac-sha2-512-etm AT openssh DOT com,hmac-ripemd160-etm AT openssh DOT com,hmac-sha1-96-etm AT openssh DOT com,hmac-md5-96-etm AT openssh DOT com,hmac-md5,hmac-sha1,umac-64 AT openssh DOT com,umac-128 AT openssh DOT com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160 AT openssh DOT com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib AT openssh DOT com debug2: kex_parse_kexinit: none,zlib AT openssh DOT 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_setup: setup hmac-md5-etm AT openssh DOT com debug1: kex: server->client aes128-ctr hmac-md5-etm AT openssh DOT com none debug2: mac_setup: setup hmac-md5-etm AT openssh DOT com debug1: kex: client->server aes128-ctr hmac-md5-etm AT openssh DOT com none debug1: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ECDSA 0f:ff:3f:f3:82:5e:ca:cd:90:a7:cd:bf:ae:51:60:4b debug1: Host 'desktop-new' is known and matches the ECDSA host key. debug1: Found key in /home/kbrown/.ssh/known_hosts:1 debug1: ssh_ecdsa_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: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/kbrown/.ssh/id_rsa (0x60006d9e0), debug2: key: /home/kbrown/.ssh/id_dsa (0x0), debug2: key: /home/kbrown/.ssh/id_ecdsa (0x0), debug2: key: /home/kbrown/.ssh/id_ed25519 (0x0), debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Next authentication method: publickey debug1: Offering RSA public key: /home/kbrown/.ssh/id_rsa debug2: we sent a publickey packet, wait for reply Connection closed by fe80::81db:bf3a:6434:6015%11 -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple