Bonjour à tous.

Depuis mon passage sous fedora 24, je rencontre un souci d'authentification par clé.

Pour ma génération de clé j'ai fait : 
ssh-keygen -t rsa
Pour recopier ma clé publique sur le serveur distant : 
ssh-copy-id -i ~/.ssh/id_rsa.pub user@ip_distant
un ssh -vvv user@ip_distant me retourne : 
OpenSSH_7.2p2, OpenSSL 1.0.2h-fips  3 May 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 58: Applying options for *
debug2: resolving "192.168.0.167" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to 192.168.0.167 [192.168.0.167] port 22.
debug1: Connection established.
debug1: identity file /home/Ced/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/Ced/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/Ced/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/Ced/.ssh/id_dsa-cert type -1
debug1: identity file /home/Ced/.ssh/id_ecdsa type 3
debug1: key_load_public: No such file or directory
debug1: identity file /home/Ced/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/Ced/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/Ced/.ssh/id_ed25519-cert 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_7.2
debug1: match: OpenSSH_7.2 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 192.168.0.167:22 as 'Sev'
debug3: hostkeys_foreach: reading file "/home/Ced/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/Ced/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from 192.168.0.167
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@libssh.org,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: 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,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc
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,zlib
debug2: compression stoc: none,zlib@openssh.com,zlib
debug2: languages ctos: 
debug2: languages stoc: 
debug2: first_kex_follows 0 
debug2: reserved 0 
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-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@libssh.org
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
debug1: kex: curve25519-sha256@libssh.org need=64 dh_need=64
debug1: kex: curve25519-sha256@libssh.org need=64 dh_need=64
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:tT5E4waTOWJaSy7QoxfQKghiw57hTghLtbuBmu78n3o
debug3: hostkeys_foreach: reading file "/home/Ced/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/Ced/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from 192.168.0.167
debug1: Host '192.168.0.167' is known and matches the ECDSA host key.
debug1: Found key in /home/Ced/.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
debug2: set_newkeys: mode 0
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS received
debug2: key: /home/Ced/.ssh/id_rsa (0x56421e087190), agent
debug2: key: /home/Ced/.ssh/id_dsa ((nil))
debug2: key: /home/Ced/.ssh/id_ecdsa (0x56421e087120)
debug2: key: /home/Ced/.ssh/id_ed25519 ((nil))
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
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,gssapi-keyex,gssapi-with-mic,password
debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic,password
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup gssapi-keyex
debug3: remaining preferred: gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_is_enabled gssapi-keyex
debug1: Next authentication method: gssapi-keyex
debug1: No valid Key exchange context
debug2: we did not send a packet, disable method
debug3: authmethod_lookup gssapi-with-mic
debug3: remaining preferred: publickey,keyboard-interactive,password
debug3: authmethod_is_enabled gssapi-with-mic
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: KEYRING:persistent:1000)

debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: KEYRING:persistent:1000)

debug1: Unspecified GSS failure.  Minor code may provide more information


debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: KEYRING:persistent:1000)

debug2: we did not send a packet, disable method
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/Ced/.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,gssapi-keyex,gssapi-with-mic,password
debug1: Trying private key: /home/Ced/.ssh/id_dsa
debug3: no such identity: /home/Ced/.ssh/id_dsa: No such file or directory
debug1: Offering ECDSA public key: /home/Ced/.ssh/id_ecdsa
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,gssapi-keyex,gssapi-with-mic,password
debug1: Trying private key: /home/Ced/.ssh/id_ed25519
debug3: no such identity: /home/Ced/.ssh/id_ed25519: No such file or directory
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
Les droits sur mes clés dans .ssh sont les suivants : 
drwx------. 22 Ced Ced 4096  9 août  19:47 ..
-rw-r--r--.  1 Ced Ced  405  9 août  20:06 id_rsa.pub
-rw-------.  1 Ced Ced 1766  9 août  20:06 id_rsa
drwx------.  2 Ced Ced 4096  9 août  20:06 .
Je dois commettre une erreur quelque part, vu que cela ne fonctionne pas. Mais je ne sais ou 🙁
Je vous remercie par avance de toute piste.
VINDICATORs wrote:supprime le .pub à la fin de .ssh/id_rsa.pub, car il faut utiliser la clef privé pour pouvoir t'y connecter qui dans ton cas est id_rsa.
Quand tu parle de supprimer le ".pub" c'est pour le ssh-copy-id ? si c'est cela, cela me semble contraire avec la doc en question, non ?:
ssh-copy-id va copier la clé publique sur l'hôte distant. Par mesure de sécurité, le script ajoute l'extension .pub au fichier d'identité si elle a été omise.
Ou ce que tu propose c'est de supprimer la clé publique sur le local une fois celle ci envoyé vers le distant ?
Je parlai pour te connecter.

Je regarderai ce soir.
Il semble que ta clé publique n'ait pas été exportée.
Pour pouvoir le faire, il faut se connecter au serveur ssh une première fois avec un mot de passe.
Déplace tes clés publiques et privées ailleurs, connecte-toi au serveur ssh avec un mot de passe, déconnecte-toi. Remet tes clés dans ~/.ssh ensuite essaie d'exporter la clé publique.
19 jours plus tard
Question de base : les clés gpg sont utilisables pour ssh il me semble ?

D'habitude je passe par gpg pour les gestion de mes clés et par exemple, la puiblication d'une clé publique comme ceci 
gpg --keyserver pgp.mit.edu --send-keys id-clé
Bon là c'est pour envoyer la clé sur le serveur du mit, mais à ce que j'ai compris tous les serveurs de clés de la planète se synchronisent mutuellement.

Et pour avoir l'id-clé je fais 
gpg --list-keys