authfd.h

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/*      $OpenBSD: authfd.h,v 1.34 2003/11/21 11:57:03 djm Exp $ */

/*
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 * Functions to interface with the SSH_AUTHENTICATION_FD socket.
 *
 * As far as I am concerned, the code I have written for this software
 * can be used freely for any purpose.  Any derived versions of this
 * software must be clearly marked as such, and if the derived work is
 * incompatible with the protocol description in the RFC file, it must be
 * called by a name other than "ssh" or "Secure Shell".
 */

#ifndef AUTHFD_H
#define AUTHFD_H

#include "buffer.h"

/* Messages for the authentication agent connection. */
#define SSH_AGENTC_REQUEST_RSA_IDENTITIES       1
#define SSH_AGENT_RSA_IDENTITIES_ANSWER         2
#define SSH_AGENTC_RSA_CHALLENGE                3
#define SSH_AGENT_RSA_RESPONSE                  4
#define SSH_AGENT_FAILURE                       5
#define SSH_AGENT_SUCCESS                       6
#define SSH_AGENTC_ADD_RSA_IDENTITY             7
#define SSH_AGENTC_REMOVE_RSA_IDENTITY          8
#define SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES    9

/* private OpenSSH extensions for SSH2 */
#define SSH2_AGENTC_REQUEST_IDENTITIES          11
#define SSH2_AGENT_IDENTITIES_ANSWER            12
#define SSH2_AGENTC_SIGN_REQUEST                13
#define SSH2_AGENT_SIGN_RESPONSE                14
#define SSH2_AGENTC_ADD_IDENTITY                17
#define SSH2_AGENTC_REMOVE_IDENTITY             18
#define SSH2_AGENTC_REMOVE_ALL_IDENTITIES       19

/* smartcard */
#define SSH_AGENTC_ADD_SMARTCARD_KEY            20
#define SSH_AGENTC_REMOVE_SMARTCARD_KEY         21

/* lock/unlock the agent */
#define SSH_AGENTC_LOCK                         22
#define SSH_AGENTC_UNLOCK                       23

/* add key with constraints */
#define SSH_AGENTC_ADD_RSA_ID_CONSTRAINED       24
#define SSH2_AGENTC_ADD_ID_CONSTRAINED          25
#define SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED 26

#define SSH_AGENT_CONSTRAIN_LIFETIME            1
#define SSH_AGENT_CONSTRAIN_CONFIRM             2

/* extended failure messages */
#define SSH2_AGENT_FAILURE                      30

/* additional error code for ssh.com's ssh-agent2 */
#define SSH_COM_AGENT2_FAILURE                  102

#define SSH_AGENT_OLD_SIGNATURE                 0x01

typedef struct {
        int     fd;
        Buffer  identities;
        int     howmany;
}       AuthenticationConnection;

int     ssh_agent_present(void);
int     ssh_get_authentication_socket(void);
void    ssh_close_authentication_socket(int);

AuthenticationConnection *ssh_get_authentication_connection(void);
void    ssh_close_authentication_connection(AuthenticationConnection *);
int      ssh_get_num_identities(AuthenticationConnection *, int);
Key     *ssh_get_first_identity(AuthenticationConnection *, char **, int);
Key     *ssh_get_next_identity(AuthenticationConnection *, char **, int);
int      ssh_add_identity(AuthenticationConnection *, Key *, const char *);
int      ssh_add_identity_constrained(AuthenticationConnection *, Key *,
    const char *, u_int, u_int);
int      ssh_remove_identity(AuthenticationConnection *, Key *);
int      ssh_remove_all_identities(AuthenticationConnection *, int);
int      ssh_lock_agent(AuthenticationConnection *, int, const char *);
int      ssh_update_card(AuthenticationConnection *, int, const char *,
    const char *, u_int, u_int);

int
ssh_decrypt_challenge(AuthenticationConnection *, Key *, BIGNUM *, u_char[16],
    u_int, u_char[16]);

int
ssh_agent_sign(AuthenticationConnection *, Key *, u_char **, u_int *, u_char *,
    u_int);

#endif                          /* AUTHFD_H */

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