No se puede actualizar el repositorio de git: “sign_and_send_pubkey: no se admite una firma mutua”

9 minutos de lectura

Estoy trabajando con un repositorio git, conectándome con él usando una clave ssh.

Funcionó bien hasta hoy. Estaba realizando una extracción y obtuve el siguiente error de ssh:

sign_and_send_pubkey: no mutual signature supported

Y luego pide una contraseña para el git usuario del servidor (que no tengo).

Es extraño porque siempre funcionó antes. Esta es la salida con el registro de diagnóstico de ssh:

$ GIT_SSH_COMMAND="ssh -vvvv" git pull origin Develop
OpenSSH_8.8p1, OpenSSL 1.1.1m  14 Dec 2021
debug1: Reading configuration data /c/Users/myuser/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug2: resolve_canonicalize: hostname SERVER.IP.ADDRESS is address
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts' -> '/c/Users/myuser/.ssh/known_hosts'
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts2' -> '/c/Users/myuser/.ssh/known_hosts2'
debug3: ssh_connect_direct: entering
debug1: Connecting to SERVER.IP.ADDRESS [SERVER.IP.ADDRESS] port 22.
debug3: set_sock_tos: set socket 4 IP_TOS 0x48
debug1: Connection established.
debug1: identity file /c/Users/myuser/.ssh/id_rsa type -1
debug1: identity file /c/Users/myuser/.ssh/id_rsa-cert type -1
debug1: identity file /c/Users/myuser/.ssh/id_dsa type -1
debug1: identity file /c/Users/myuser/.ssh/id_dsa-cert type -1
debug1: identity file /c/Users/myuser/.ssh/id_ecdsa type -1
debug1: identity file /c/Users/myuser/.ssh/id_ecdsa-cert type -1
debug1: identity file /c/Users/myuser/.ssh/id_ecdsa_sk type -1
debug1: identity file /c/Users/myuser/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /c/Users/myuser/.ssh/id_ed25519 type -1
debug1: identity file /c/Users/myuser/.ssh/id_ed25519-cert type -1
debug1: identity file /c/Users/myuser/.ssh/id_ed25519_sk type -1
debug1: identity file /c/Users/myuser/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /c/Users/myuser/.ssh/id_xmss type -1
debug1: identity file /c/Users/myuser/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.8
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1.4
debug1: compat_banner: match: OpenSSH_5.9p1 Debian-5ubuntu1.4 pat OpenSSH_5* compat 0x0c000002
debug2: fd 4 setting O_NONBLOCK
debug1: Authenticating to SERVER.IP.ADDRESS:22 as 'git'
debug3: record_hostkey: found key type ECDSA in file /c/Users/myuser/.ssh/known_hosts:1
debug3: load_hostkeys_file: loaded 1 keys from SERVER.IP.ADDRESS
debug1: load_hostkeys: fopen /c/Users/myuser/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp256
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-group14-sha256,ext-info-c
debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp256,ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-ed25519,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ssh-ed25519@openssh.com,sk-ecdsa-sha2-nistp256@openssh.com,rsa-sha2-512,rsa-sha2-256
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,3des-cbc,aes256-cbc,aes192-cbc
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,3des-cbc,aes256-cbc,aes192-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: 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
debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: MACs ctos: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: MACs stoc: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
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: ecdh-sha2-nistp256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: aes128-ctr MAC: umac-64@openssh.com compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: umac-64@openssh.com compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
debug3: record_hostkey: found key type ECDSA in file /c/Users/myuser/.ssh/known_hosts:1
debug3: load_hostkeys_file: loaded 1 keys from SERVER.IP.ADDRESS
debug1: load_hostkeys: fopen /c/Users/myuser/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: Host 'SERVER.IP.ADDRESS' is known and matches the ECDSA host key.
debug1: Found key in /c/Users/myuser/.ssh/known_hosts:1
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey out after 4294967296 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 in after 4294967296 blocks
debug1: Will attempt key: /c/Users/myuser/.ssh/id_rsa
debug1: Will attempt key: /c/Users/myuser/.ssh/id_dsa
debug1: Will attempt key: /c/Users/myuser/.ssh/id_ecdsa
debug1: Will attempt key: /c/Users/myuser/.ssh/id_ecdsa_sk
debug1: Will attempt key: /c/Users/myuser/.ssh/id_ed25519
debug1: Will attempt key: /c/Users/myuser/.ssh/id_ed25519_sk
debug1: Will attempt key: /c/Users/myuser/.ssh/id_xmss
debug2: pubkey_prepare: done
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
debug3: start over, passed a different list publickey,password
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: /c/Users/myuser/.ssh/id_rsa
Enter passphrase for key '/c/Users/myuser/.ssh/id_rsa':
debug3: sign_and_send_pubkey: RSA SHA256:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
sign_and_send_pubkey: no mutual signature supported
debug1: Trying private key: /c/Users/myuser/.ssh/id_dsa
debug3: no such identity: /c/Users/myuser/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /c/Users/myuser/.ssh/id_ecdsa
debug3: no such identity: /c/Users/myuser/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /c/Users/myuser/.ssh/id_ecdsa_sk
debug3: no such identity: /c/Users/myuser/.ssh/id_ecdsa_sk: No such file or directory
debug1: Trying private key: /c/Users/myuser/.ssh/id_ed25519
debug3: no such identity: /c/Users/myuser/.ssh/id_ed25519: No such file or directory
debug1: Trying private key: /c/Users/myuser/.ssh/id_ed25519_sk
debug3: no such identity: /c/Users/myuser/.ssh/id_ed25519_sk: No such file or directory
debug1: Trying private key: /c/Users/myuser/.ssh/id_xmss
debug3: no such identity: /c/Users/myuser/.ssh/id_xmss: 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
git@SERVER.IP.ADDRESS's password:

¿Qué estoy haciendo mal?

Estoy usando git para Windows (probé las consolas git bash y powershell), versión 2.35.3.windows.1.

Recibí este error en openstack y la solución para mí fue:

ssh -o 'PubkeyAcceptedKeyTypes +ssh-rsa' -i id_microstack cirros@10.20.20.15

El error significa que el servidor y el cliente no pudieron encontrar un algoritmo compatible con ambos. Probablemente, el servidor es demasiado antiguo y solo admite algoritmos obsoletos que su cliente ya no acepta. O bien, su clave de cliente está firmada con un algoritmo antiguo.

La solución depende de la situación: es posible que deba actualizar el servidor, el cliente o volver a generar su clave con un algoritmo más nuevo.

Pero si desea volver a habilitar los algoritmos antiguos, puede hacerlo agregando lo siguiente a su ~/.ssh/config expediente. (Si el archivo no existe, créelo).

Host alias my-host.co
  PubkeyAcceptedKeyTypes=+ssh-rsa

Notas:

  • Estos algoritmos antiguos están en desuso porque ya no se consideran seguros. Así que esta debería ser tu última solución.
  • Solo habilité los algoritmos antiguos para un solo host, para reducir el riesgo.
  • habilité ssh-rsa. Es posible que necesite algunos otros, como ssh-dss.

Avatar de usuario de SergoUnix
SergoUnix

agregue el archivo ~/.ssh/config (nano ~/.ssh/config)

Host *
PubkeyAcceptedKeyTypes=+ssh-dss

  • Como está escrito actualmente, su respuesta no está clara. Edite para agregar detalles adicionales que ayudarán a otros a comprender cómo esto aborda la pregunta formulada. Puede encontrar más información sobre cómo escribir buenas respuestas en el centro de ayuda.

    – Comunidad
    Bot

    12 de mayo a las 1:18

¿Ha sido útil esta solución?