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/*
*
* authfd.h
*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
*
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
*
* Created: Wed Mar 29 01:17:41 1995 ylo
*
* Functions to interface with the SSH_AUTHENTICATION_FD socket.
*
*/
/* RCSID("$Id: authfd.h,v 1.5 2000/04/16 01:18:40 damien Exp $"); */
#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
typedef struct {
int fd;
Buffer packet;
Buffer identities;
int howmany;
} AuthenticationConnection;
/* Returns the number of the authentication fd, or -1 if there is none. */
int ssh_get_authentication_socket();
/*
* This should be called for any descriptor returned by
* ssh_get_authentication_socket(). Depending on the way the descriptor was
* obtained, this may close the descriptor.
*/
void ssh_close_authentication_socket(int authfd);
/*
* Opens and connects a private socket for communication with the
* authentication agent. Returns NULL if an error occurred and the
* connection could not be opened. The connection should be closed by the
* caller by calling ssh_close_authentication_connection().
*/
AuthenticationConnection *ssh_get_authentication_connection();
/*
* Closes the connection to the authentication agent and frees any associated
* memory.
*/
void ssh_close_authentication_connection(AuthenticationConnection * ac);
/*
* Returns the first authentication identity held by the agent. Returns true
* if an identity is available, 0 otherwise. The caller must initialize the
* integers before the call, and free the comment after a successful call
* (before calling ssh_get_next_identity).
*/
int
ssh_get_first_identity(AuthenticationConnection * connection,
BIGNUM * e, BIGNUM * n, char **comment);
/*
* Returns the next authentication identity for the agent. Other functions
* can be called between this and ssh_get_first_identity or two calls of this
* function. This returns 0 if there are no more identities. The caller
* must free comment after a successful return.
*/
int
ssh_get_next_identity(AuthenticationConnection * connection,
BIGNUM * e, BIGNUM * n, char **comment);
/* Requests the agent to decrypt the given challenge. Returns true if
the agent claims it was able to decrypt it. */
int
ssh_decrypt_challenge(AuthenticationConnection * auth,
BIGNUM * e, BIGNUM * n, BIGNUM * challenge,
unsigned char session_id[16],
unsigned int response_type,
unsigned char response[16]);
/*
* Adds an identity to the authentication server. This call is not meant to
* be used by normal applications. This returns true if the identity was
* successfully added.
*/
int
ssh_add_identity(AuthenticationConnection * connection, RSA * key,
const char *comment);
/*
* Removes the identity from the authentication server. This call is not
* meant to be used by normal applications. This returns true if the
* identity was successfully added.
*/
int ssh_remove_identity(AuthenticationConnection * connection, RSA * key);
/*
* Removes all identities from the authentication agent. This call is not
* meant to be used by normal applications. This returns true if the
* operation was successful.
*/
int ssh_remove_all_identities(AuthenticationConnection * connection);
/* Closes the connection to the authentication agent. */
void ssh_close_authentication(AuthenticationConnection * connection);
#endif /* AUTHFD_H */
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