134 lines
4.4 KiB
C
134 lines
4.4 KiB
C
/*
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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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/* RCSID("$OpenBSD: authfd.h,v 1.13 2000/10/09 21:51:00 markus Exp $"); */
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#ifndef AUTHFD_H
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#define AUTHFD_H
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#include "buffer.h"
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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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/* 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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typedef struct {
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int fd;
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Buffer identities;
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int howmany;
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} AuthenticationConnection;
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/* Returns the number of the authentication fd, or -1 if there is none. */
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int ssh_get_authentication_socket();
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/*
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* This should be called for any descriptor returned by
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* ssh_get_authentication_socket(). Depending on the way the descriptor was
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* obtained, this may close the descriptor.
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*/
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void ssh_close_authentication_socket(int authfd);
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/*
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* Opens and connects a private socket for communication with the
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* authentication agent. Returns NULL if an error occurred and the
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* connection could not be opened. The connection should be closed by the
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* caller by calling ssh_close_authentication_connection().
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*/
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AuthenticationConnection *ssh_get_authentication_connection();
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/*
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* Closes the connection to the authentication agent and frees any associated
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* memory.
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*/
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void ssh_close_authentication_connection(AuthenticationConnection *auth);
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/*
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* Returns the first authentication identity held by the agent or NULL if
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* no identies are available. Caller must free comment and key.
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* Note that you cannot mix calls with different versions.
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*/
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Key *ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version);
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/*
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* Returns the next authentication identity for the agent. Other functions
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* can be called between this and ssh_get_first_identity or two calls of this
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* function. This returns NULL if there are no more identities. The caller
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* must free key and comment after a successful return.
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*/
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Key *ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version);
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/*
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* Requests the agent to decrypt the given challenge. Returns true if the
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* agent claims it was able to decrypt it.
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*/
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int
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ssh_decrypt_challenge(AuthenticationConnection *auth,
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Key *key, BIGNUM * challenge,
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unsigned char session_id[16],
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unsigned int response_type,
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unsigned char response[16]);
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/* Requests the agent to sign data using key */
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int
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ssh_agent_sign(AuthenticationConnection *auth,
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Key *key,
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unsigned char **sigp, int *lenp,
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unsigned char *data, int datalen);
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/*
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* Adds an identity to the authentication server. This call is not meant to
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* be used by normal applications. This returns true if the identity was
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* successfully added.
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*/
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int
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ssh_add_identity(AuthenticationConnection *auth, Key *key,
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const char *comment);
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/*
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* Removes the identity from the authentication server. This call is not
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* meant to be used by normal applications. This returns true if the
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* identity was successfully added.
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*/
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int ssh_remove_identity(AuthenticationConnection *auth, Key *key);
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/*
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* Removes all identities from the authentication agent. This call is not
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* meant to be used by normal applications. This returns true if the
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* operation was successful.
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*/
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int ssh_remove_all_identities(AuthenticationConnection *auth, int version);
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#endif /* AUTHFD_H */
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