Ed Maste
2574974648
Full release notes are available at https://www.openssh.com/txt/release-10.3 Selected highlights from the release notes: * ssh(1), sshd(8): remove bug compatibility for implementations that don't support rekeying. If such an implementation tries to interoperate with OpenSSH, it will now eventually fail when the transport needs rekeying. * ssh(1), sshd(8): support IANA-assigned codepoints for SSH agent forwarding, as per draft-ietf-sshm-ssh-agent. Support for the new names is advertised via the EXT_INFO message. If a server offers support for the new names, then they are used preferentially. * ssh(1): add a ~I escape option that shows information about the current SSH connection. * sshd(8): add 'invaliduser' penalty to PerSourcePenalties, which is applied to login attempts for usernames that do not match real accounts. Defaults to 5s to match 'authfail' but allows administrators to block such attempts for longer if desired. * Support the ed25519 signature scheme via libcrypto. Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D56999
125 lines
4.2 KiB
C
125 lines
4.2 KiB
C
/* $OpenBSD: authfd.h,v 1.55 2026/03/05 05:44:15 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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* Functions to interface with the SSH_AUTHENTICATION_FD socket.
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*
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* As far as I am concerned, the code I have written for this software
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* can be used freely for any purpose. Any derived versions of this
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* software must be clearly marked as such, and if the derived work is
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* incompatible with the protocol description in the RFC file, it must be
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* called by a name other than "ssh" or "Secure Shell".
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*/
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#ifndef AUTHFD_H
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#define AUTHFD_H
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struct sshbuf;
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struct sshkey;
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/* List of identities returned by ssh_fetch_identitylist() */
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struct ssh_identitylist {
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size_t nkeys;
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struct sshkey **keys;
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char **comments;
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};
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/* Key destination restrictions */
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struct dest_constraint_hop {
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char *user; /* wildcards allowed */
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char *hostname; /* used to matching cert principals and for display */
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int is_ca;
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u_int nkeys; /* number of entries in *both* 'keys' and 'key_is_ca' */
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struct sshkey **keys;
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int *key_is_ca;
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};
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struct dest_constraint {
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struct dest_constraint_hop from;
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struct dest_constraint_hop to;
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};
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int ssh_get_authentication_socket(int *fdp);
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int ssh_get_authentication_socket_path(const char *authsocket, int *fdp);
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void ssh_close_authentication_socket(int sock);
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int ssh_lock_agent(int sock, int lock, const char *password);
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int ssh_fetch_identitylist(int sock, struct ssh_identitylist **idlp);
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void ssh_free_identitylist(struct ssh_identitylist *idl);
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int ssh_add_identity_constrained(int sock, struct sshkey *key,
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const char *comment, u_int life, u_int confirm, const char *provider,
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struct dest_constraint **dest_constraints, size_t ndest_constraints);
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int ssh_agent_has_key(int sock, const struct sshkey *key);
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int ssh_remove_identity(int sock, const struct sshkey *key);
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int ssh_update_card(int sock, int add, const char *reader_id,
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const char *pin, u_int life, u_int confirm,
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struct dest_constraint **dest_constraints,
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size_t ndest_constraints,
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int cert_only, struct sshkey **certs, size_t ncerts);
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int ssh_remove_all_identities(int sock, int version);
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int ssh_agent_sign(int sock, const struct sshkey *key,
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u_char **sigp, size_t *lenp,
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const u_char *data, size_t datalen, const char *alg, u_int compat);
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int ssh_agent_bind_hostkey(int sock, const struct sshkey *key,
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const struct sshbuf *session_id, const struct sshbuf *signature,
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int forwarding);
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int ssh_agent_query_extensions(int sock, char ***exts);
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/* Messages for the authentication agent connection. */
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#define SSH_AGENTC_REQUEST_RSA_IDENTITIES 1
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#define SSH_AGENT_RSA_IDENTITIES_ANSWER 2
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#define SSH_AGENTC_RSA_CHALLENGE 3
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#define SSH_AGENT_RSA_RESPONSE 4
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#define SSH_AGENT_FAILURE 5
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#define SSH_AGENT_SUCCESS 6
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#define SSH_AGENTC_ADD_RSA_IDENTITY 7
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#define SSH_AGENTC_REMOVE_RSA_IDENTITY 8
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#define SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9
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/* private OpenSSH extensions for SSH2 */
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#define SSH2_AGENTC_REQUEST_IDENTITIES 11
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#define SSH2_AGENT_IDENTITIES_ANSWER 12
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#define SSH2_AGENTC_SIGN_REQUEST 13
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#define SSH2_AGENT_SIGN_RESPONSE 14
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#define SSH2_AGENTC_ADD_IDENTITY 17
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#define SSH2_AGENTC_REMOVE_IDENTITY 18
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#define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
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/* smartcard */
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#define SSH_AGENTC_ADD_SMARTCARD_KEY 20
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#define SSH_AGENTC_REMOVE_SMARTCARD_KEY 21
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/* lock/unlock the agent */
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#define SSH_AGENTC_LOCK 22
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#define SSH_AGENTC_UNLOCK 23
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/* add key with constraints */
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#define SSH_AGENTC_ADD_RSA_ID_CONSTRAINED 24
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#define SSH2_AGENTC_ADD_ID_CONSTRAINED 25
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#define SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED 26
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/* generic extension mechanism */
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#define SSH_AGENTC_EXTENSION 27
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#define SSH_AGENT_EXTENSION_FAILURE 28
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#define SSH_AGENT_EXTENSION_RESPONSE 29
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#define SSH_AGENT_CONSTRAIN_LIFETIME 1
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#define SSH_AGENT_CONSTRAIN_CONFIRM 2
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#define SSH_AGENT_CONSTRAIN_EXTENSION 255
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/* extended failure messages */
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#define SSH2_AGENT_FAILURE 30
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/* additional error code for ssh.com's ssh-agent2 */
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#define SSH_COM_AGENT2_FAILURE 102
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#define SSH_AGENT_OLD_SIGNATURE 0x01
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#define SSH_AGENT_RSA_SHA2_256 0x02
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#define SSH_AGENT_RSA_SHA2_512 0x04
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#endif /* AUTHFD_H */
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