Windows – ssh command from Windows to Mac: permission denied

macpermissionssshssh-keyswindows

Objective

I want to access to my local Mac computer (version: High Sierra 10.13.5) from my Windows computer (Windows 10). The purpose is for automation, to remove the password authentication and add SSH keys access. Both machines are on same Wi-Fi.

Mac Configuration

Here is my sshd_config file:

#   $OpenBSD: sshd_config,v 1.101 2017/03/14 07:19:07 djm Exp $

# This is the sshd server system-wide configuration file.  See
# sshd_config(5) for more information.

# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin

# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented.  Uncommented options override the
# default value.

#Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::

#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_dsa_key
#HostKey /etc/ssh/ssh_host_ecdsa_key
#HostKey /etc/ssh/ssh_host_ed25519_key

# Ciphers and keying
#RekeyLimit default none

# Logging
#SyslogFacility AUTH
#LogLevel INFO

# Authentication:

#LoginGraceTime 2m
#PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10

#PubkeyAuthentication no

# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
# but this is overridden so installations will only check .ssh/authorized_keys
AuthorizedKeysFile  .ssh/authorized_keys

#AuthorizedPrincipalsFile none

#AuthorizedKeysCommand none
#AuthorizedKeysCommandUser nobody

# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes

# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication no
#PermitEmptyPasswords no

# Change to no to disable s/key passwords
ChallengeResponseAuthentication no

# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no

# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes

# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication.  Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
UsePAM no

#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
#X11DisplayOffset 10
#X11UseLocalhost yes
#PermitTTY yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS no
#PidFile /var/run/sshd.pid
#MaxStartups 10:30:100
#PermitTunnel no
#ChrootDirectory none
#VersionAddendum none

# pass locale information
AcceptEnv LANG LC_*

# no default banner path
#Banner none

# override default of no subsystems
Subsystem   sftp    /usr/libexec/sftp-server

# Example of overriding settings on a per-user basis
#Match User anoncvs
#   X11Forwarding no
#   AllowTcpForwarding no
#   PxermitTTY no
#   ForceCommand cvs server

Here is my .ssh folder on the Mac:

User$ ls -a
.       ..      id_rsa      id_rsa.pub  known_hosts

Windows Configuration

Here is my .ssh folder on my Windows computer:

Répertoire de C:\Users\myName\.ssh

28/06/2018  20:13    <DIR>          .
28/06/2018  20:13    <DIR>          ..
28/06/2018  20:28             1 679 id_rsa
28/06/2018  20:28               397 id_rsa.pub
28/06/2018  21:17             1 608 known_hosts

Keys

I've generated the SSH keys on my Windows & Mac computers to generate the folders, then I copied the public key ".pub" from Windows to the Mac /.ssh/id_rsa.pub

Steps Attempted

I ran this in Windows:

C:\Users\myName>ssh myName@macbook-air.home -vvv

and this was the output:

OpenSSH_for_Windows_7.6p1, LibreSSL 2.6.4
debug3: Failed to open file:C:\\Users\\myName/.ssh/config error:2
debug3: Failed to open file:C:\\ProgramData\\ssh/ssh_config error:2
debug2: resolving "macbook-air.home" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to macbook-air.home [2a01:cb00:b4d:7200:1d70:6f19:ec84:50d2] port 22.
debug1: Connection established.
debug1: identity file C:\\Users\\myName/.ssh/id_rsa type 0
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_rsa-cert error:2
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_rsa-cert.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\myName/.ssh/id_rsa-cert type -1
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_dsa error:2
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_dsa.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\myName/.ssh/id_dsa type -1
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_dsa-cert error:2
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_dsa-cert.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\myName/.ssh/id_dsa-cert type -1
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_ecdsa error:2
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_ecdsa.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\myName/.ssh/id_ecdsa type -1
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_ecdsa-cert error:2
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_ecdsa-cert.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\myName/.ssh/id_ecdsa-cert type -1
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_ed25519 error:2
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_ed25519.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\myName/.ssh/id_ed25519 type -1
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_ed25519-cert error:2
debug3: Failed to open file:C:\\Users\\myName/.ssh/id_ed25519-cert.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\myName/.ssh/id_ed25519-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_7.6
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.6
debug1: match: OpenSSH_7.6 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to macbook-air.home:22 as 'myName'
debug3: hostkeys_foreach: reading file "C:\\Users\\myName/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file C:\\Users\\myName/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from macbook-air.home
debug3: Failed to open file:C:\\Users\\myName/.ssh/known_hosts2 error:2
debug3: Failed to open file:C:\\ProgramData\\ssh/ssh_known_hosts error:2
debug3: Failed to open file:C:\\ProgramData\\ssh/ssh_known_hosts2 error:2
debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,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: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none
debug2: compression stoc: none
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1
debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlib@openssh.com
debug2: compression stoc: none,zlib@openssh.com
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com 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:ZwSw/+863TCoPOsZp7NJIKd79fbX1YR5z7Mc8QeQk+A
debug3: hostkeys_foreach: reading file "C:\\Users\\myName/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file C:\\Users\\myName/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from macbook-air.home
debug3: Failed to open file:C:\\Users\\myName/.ssh/known_hosts2 error:2
debug3: Failed to open file:C:\\ProgramData\\ssh/ssh_known_hosts error:2
debug3: Failed to open file:C:\\ProgramData\\ssh/ssh_known_hosts2 error:2
debug3: hostkeys_foreach: reading file "C:\\Users\\myName/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file C:\\Users\\myName/.ssh/known_hosts:8
debug3: load_hostkeys: loaded 1 keys from 2a01:cb00:b4d:7200:1d70:6f19:ec84:50d2
debug3: Failed to open file:C:\\Users\\myName/.ssh/known_hosts2 error:2
debug3: Failed to open file:C:\\ProgramData\\ssh/ssh_known_hosts error:2
debug3: Failed to open file:C:\\ProgramData\\ssh/ssh_known_hosts2 error:2
debug1: Host 'macbook-air.home' is known and matches the ECDSA host key.
debug1: Found key in C:\\Users\\myName/.ssh/known_hosts:1
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
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey after 134217728 blocks
debug3: unable to connect to pipe \\\\.\\pipe\\openssh-ssh-agent, error: 2
debug1: pubkey_prepare: ssh_get_authentication_socket: No such file or directory
debug2: key: C:\\Users\\myName/.ssh/id_rsa (000001DFF3B5DC40)
debug2: key: C:\\Users\\myName/.ssh/id_dsa (0000000000000000)
debug2: key: C:\\Users\\myName/.ssh/id_ecdsa (0000000000000000)
debug2: key: C:\\Users\\myName/.ssh/id_ed25519 (0000000000000000)
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
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
debug3: start over, passed a different list publickey
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: Offering public key: RSA SHA256:d3nfNGfFM1IIyh2zlebYb4ai5BiDUObJchtnCChDYUY C:\\Users\\myName/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey
debug1: Trying private key: C:\\Users\\myName/.ssh/id_dsa
debug3: GetFileAttributesExW with last error 2
debug3: no such identity: C:\\Users\\myName/.ssh/id_dsa: No such file or directory
debug1: Trying private key: C:\\Users\\myName/.ssh/id_ecdsa
debug3: GetFileAttributesExW with last error 2
debug3: no such identity: C:\\Users\\myName/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: C:\\Users\\myName/.ssh/id_ed25519
debug3: GetFileAttributesExW with last error 2
debug3: no such identity: C:\\Users\\myName/.ssh/id_ed25519: No such file or directory
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
myName@macbook-air.home: Permission denied (publickey).

I'm a bit lost on any steps that I've missed.

Best Answer

  • Since you are accessing the Mac from Windows you need the private key on the Windows system and the public key on the Mac. The public key is placed into a file called authorized_keys on the host your sshing to (in this case the Mac). It would be located in:

    ~/.ssh/authorized_keys 
    

    This file contains the public keys for clients you will be connecting from.

    Make sure you set the permissions on the file using chmod go-rwx authorized_keys. If its readable by others than the owner I believe ssh will not process the file.