I’ve had my yubikey 5c for a while, working great on my MacBook Air M1.
I just got a Microsoft Surface Pro 11 with the new snapdragon arm64 cpu.
So I download yubico-piv-tool and build it, linking towards openssl.
I use the ssh client from windows (which is linked against libressl if that matters) and try to connect to my server with:
ssh -I C:Usersiveqyliblibykcs11.dll myServer-v
This just fails with:
OpenSSH_for_Windows_9.5.p1, LibreSSL 3.8.2
debug1: Reading configuration data C:\Users\iveqy/.ssh/config
debug1: C:\Users\iveqy/.ssh/config line 1: Applying options for myServer
debug1: Connecting to myServer [XX.XX.XX.XX] port 22.
debug1: Connection established.
debug1: provider C:\Users\iveqy\lib\libykcs11.dll: manufacturerID <Yubico (www.yubico.com)> cryptokiVersion 2.40 libraryDescription <PKCS#11 PIV Library (SP-800-73)> libraryVersion 2.52
debug1: provider C:\Users\iveqy\lib\libykcs11.dll slot 0: label <YubiKey PIV #16932921> manufacturerID <Yubico (www.yubico.com)> model <YubiKey YK5> serial <16932921> flags 0x40d
debug1: have 1 keys
debug1: pkcs11_k11_free: parent 00000269B018C0F0 ptr 00000269B01BF9E0 idx 1
debug1: pkcs11_provider_unref: provider "C:\Users\iveqy\lib\libykcs11.dll" refcount 2
debug1: identity file C:\Users\iveqy/.ssh/id_rsa type -1
debug1: identity file C:\Users\iveqy/.ssh/id_rsa-cert type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ecdsa type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ecdsa-cert type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ecdsa_sk type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ed25519 type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ed25519-cert type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ed25519_sk type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ed25519_sk-cert type -1
debug1: identity file C:\Users\iveqy/.ssh/id_xmss type -1
debug1: identity file C:\Users\iveqy/.ssh/id_xmss-cert type -1
debug1: identity file C:\Users\iveqy/.ssh/id_dsa type -1
debug1: identity file C:\Users\iveqy/.ssh/id_dsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_9.5
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.6p1 Ubuntu-4ubuntu0.7
debug1: compat_banner: match: OpenSSH_7.6p1 Ubuntu-4ubuntu0.7 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002
debug1: Authenticating to myServer:22 as 'iveqy'
debug1: load_hostkeys: fopen C:\Users\iveqy/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen __PROGRAMDATA__\ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen __PROGRAMDATA__\ssh/ssh_known_hosts2: No such file or directory
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25519 SHA256:X4uc/yncys1lBSUdrlF++Yh7wnr61FoYp5WRJpQReQg
debug1: load_hostkeys: fopen C:\Users\iveqy/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen __PROGRAMDATA__\ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen __PROGRAMDATA__\ssh/ssh_known_hosts2: No such file or directory
debug1: Host 'dahut.tech' is known and matches the ED25519 host key.
debug1: Found key in C:\Users\iveqy/.ssh/known_hosts:1
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 134217728 blocks
debug1: get_agent_identities: ssh_get_authentication_socket: No such file or directory
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_rsa
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_ecdsa
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_ecdsa_sk
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_ed25519
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_ed25519_sk
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_xmss
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_dsa
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>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: C:\Users\iveqy/.ssh/id_rsa
debug1: Trying private key: C:\Users\iveqy/.ssh/id_ecdsa
debug1: Trying private key: C:\Users\iveqy/.ssh/id_ecdsa_sk
debug1: Trying private key: C:\Users\iveqy/.ssh/id_ed25519
debug1: Trying private key: C:\Users\iveqy/.ssh/id_ed25519_sk
debug1: Trying private key: C:\Users\iveqy/.ssh/id_xmss
debug1: Trying private key: C:\Users\iveqy/.ssh/id_dsa
debug1: No more authentication methods to try.
[email protected]: Permission denied (publickey).
So I do a key export with ssh-keygen. Get a new public key (which I don’t understand why) and add that to authorized_keys on my server. Then I try again. This time I get to enter my pin code but still no success in loggin in.
PS C:Usersiveqysrcopenssh-portable> ssh -I C:Usersiveqyliblibykcs11.dll myServer -v
OpenSSH_for_Windows_9.5p1, LibreSSL 3.8.2
debug1: Reading configuration data C:\Users\iveqy/.ssh/config
debug1: C:\Users\iveqy/.ssh/config line 6: Applying options for myServer
debug1: Connecting to 31.208.38.86 [XX.XX.XX.XX] port 22.
debug1: Connection established.
debug1: provider C:\Users\iveqy\lib\libykcs11.dll: manufacturerID <Yubico (www.yubico.com)> cryptokiVersion 2.40 libraryDescription <PKCS#11 PIV Library (SP-800-73)> libraryVersion 2.52
debug1: provider C:\Users\iveqy\lib\libykcs11.dll slot 0: label <YubiKey PIV #16932921> manufacturerID <Yubico (www.yubico.com)> model <YubiKey YK5> serial <16932921> flags 0x40d
debug1: have 1 keys
debug1: pkcs11_k11_free: parent 000001C1B018C230 ptr 000001C1B01BF740 idx 1
debug1: pkcs11_provider_unref: provider "C:\Users\iveqy\lib\libykcs11.dll" refcount 2
debug1: identity file C:\Users\iveqy/.ssh/id_rsa type -1
debug1: identity file C:\Users\iveqy/.ssh/id_rsa-cert type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ecdsa type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ecdsa-cert type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ecdsa_sk type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ed25519 type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ed25519-cert type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ed25519_sk type -1
debug1: identity file C:\Users\iveqy/.ssh/id_ed25519_sk-cert type -1
debug1: identity file C:\Users\iveqy/.ssh/id_xmss type -1
debug1: identity file C:\Users\iveqy/.ssh/id_xmss-cert type -1
debug1: identity file C:\Users\iveqy/.ssh/id_dsa type -1
debug1: identity file C:\Users\iveqy/.ssh/id_dsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_9.5
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.9p1 Debian-10+deb10u2
debug1: compat_banner: match: OpenSSH_7.9p1 Debian-10+deb10u2 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 31.208.38.86:2255 as 'iveqy'
debug1: load_hostkeys: fopen C:\Users\iveqy/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen __PROGRAMDATA__\ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen __PROGRAMDATA__\ssh/ssh_known_hosts2: No such file or directory
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25519 SHA256:p17Mv39287EYUF0vySYjynh9GrFT2iaVipBf0vVdR1c
debug1: load_hostkeys: fopen C:\Users\iveqy/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen __PROGRAMDATA__\ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen __PROGRAMDATA__\ssh/ssh_known_hosts2: No such file or directory
debug1: Host '[31.208.38.86]:2255' is known and matches the ED25519 host key.
debug1: Found key in C:\Users\iveqy/.ssh/known_hosts:3
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 134217728 blocks
debug1: get_agent_identities: ssh_get_authentication_socket: No such file or directory
debug1: Will attempt key: Public key for PIV Attestation RSA SHA256:IVuYB+R5NGoEnf0HNysTj/4rZG+D+91Bd9+h6OnmEtI token
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_rsa
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_ecdsa
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_ecdsa_sk
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_ed25519
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_ed25519_sk
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_xmss
debug1: Will attempt key: C:\Users\iveqy/.ssh/id_dsa
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>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering public key: Public key for PIV Attestation RSA SHA256:IVuYB+R5NGoEnf0HNysTj/4rZG+D+91Bd9+h6OnmEtI token
debug1: Server accepts key: Public key for PIV Attestation RSA SHA256:IVuYB+R5NGoEnf0HNysTj/4rZG+D+91Bd9+h6OnmEtI token
Enter PIN for 'YubiKey PIV #16932921':
debug1: C_FindObjects failed (nfound 0 nattr 3): 0
debug1: pkcs11_check_obj_bool_attrib: provider "C:\Users\iveqy\lib\libykcs11.dll" slot 0 object 110: attrib 514 = 0
C_Sign failed: 7
debug1: identity_sign: sshkey_sign: error in libcrypto
sign_and_send_pubkey: signing failed for RSA "Public key for PIV Attestation": error in libcrypto
debug1: pkcs11_k11_free: parent 000001C1B018CF50 ptr 0000000000000000 idx 1
debug1: Trying private key: C:\Users\iveqy/.ssh/id_rsa
debug1: Trying private key: C:\Users\iveqy/.ssh/id_ecdsa
debug1: Trying private key: C:\Users\iveqy/.ssh/id_ecdsa_sk
debug1: Trying private key: C:\Users\iveqy/.ssh/id_ed25519
debug1: Trying private key: C:\Users\iveqy/.ssh/id_ed25519_sk
debug1: Trying private key: C:\Users\iveqy/.ssh/id_xmss
debug1: Trying private key: C:\Users\iveqy/.ssh/id_dsa
debug1: Next authentication method: password
[email protected]'s password: