2 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5 * Functions to interface with the SSH_AUTHENTICATION_FD socket.
7 * As far as I am concerned, the code I have written for this software
8 * can be used freely for any purpose. Any derived versions of this
9 * software must be clearly marked as such, and if the derived work is
10 * incompatible with the protocol description in the RFC file, it must be
11 * called by a name other than "ssh" or "Secure Shell".
14 /* RCSID("$OpenBSD: authfd.h,v 1.14 2000/11/12 19:50:37 markus Exp $"); */
21 /* Messages for the authentication agent connection. */
22 #define SSH_AGENTC_REQUEST_RSA_IDENTITIES 1
23 #define SSH_AGENT_RSA_IDENTITIES_ANSWER 2
24 #define SSH_AGENTC_RSA_CHALLENGE 3
25 #define SSH_AGENT_RSA_RESPONSE 4
26 #define SSH_AGENT_FAILURE 5
27 #define SSH_AGENT_SUCCESS 6
28 #define SSH_AGENTC_ADD_RSA_IDENTITY 7
29 #define SSH_AGENTC_REMOVE_RSA_IDENTITY 8
30 #define SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9
32 /* private OpenSSH extensions for SSH2 */
33 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
34 #define SSH2_AGENT_IDENTITIES_ANSWER 12
35 #define SSH2_AGENTC_SIGN_REQUEST 13
36 #define SSH2_AGENT_SIGN_RESPONSE 14
37 #define SSH2_AGENTC_ADD_IDENTITY 17
38 #define SSH2_AGENTC_REMOVE_IDENTITY 18
39 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
41 /* additional error code for ssh.com's ssh-agent2 */
42 #define SSH_COM_AGENT2_FAILURE 102
44 #define SSH_AGENT_OLD_SIGNATURE 0x01
51 } AuthenticationConnection;
53 /* Returns the number of the authentication fd, or -1 if there is none. */
54 int ssh_get_authentication_socket();
57 * This should be called for any descriptor returned by
58 * ssh_get_authentication_socket(). Depending on the way the descriptor was
59 * obtained, this may close the descriptor.
61 void ssh_close_authentication_socket(int authfd);
64 * Opens and connects a private socket for communication with the
65 * authentication agent. Returns NULL if an error occurred and the
66 * connection could not be opened. The connection should be closed by the
67 * caller by calling ssh_close_authentication_connection().
69 AuthenticationConnection *ssh_get_authentication_connection();
72 * Closes the connection to the authentication agent and frees any associated
75 void ssh_close_authentication_connection(AuthenticationConnection *auth);
78 * Returns the number authentication identity held by the agent.
80 int ssh_get_num_identities(AuthenticationConnection *auth, int version);
83 * Returns the first authentication identity held by the agent or NULL if
84 * no identies are available. Caller must free comment and key.
85 * Note that you cannot mix calls with different versions.
87 Key *ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version);
90 * Returns the next authentication identity for the agent. Other functions
91 * can be called between this and ssh_get_first_identity or two calls of this
92 * function. This returns NULL if there are no more identities. The caller
93 * must free key and comment after a successful return.
95 Key *ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version);
98 * Requests the agent to decrypt the given challenge. Returns true if the
99 * agent claims it was able to decrypt it.
102 ssh_decrypt_challenge(AuthenticationConnection *auth,
103 Key *key, BIGNUM * challenge,
104 unsigned char session_id[16],
105 unsigned int response_type,
106 unsigned char response[16]);
108 /* Requests the agent to sign data using key */
110 ssh_agent_sign(AuthenticationConnection *auth,
112 unsigned char **sigp, int *lenp,
113 unsigned char *data, int datalen);
116 * Adds an identity to the authentication server. This call is not meant to
117 * be used by normal applications. This returns true if the identity was
118 * successfully added.
121 ssh_add_identity(AuthenticationConnection *auth, Key *key,
122 const char *comment);
125 * Removes the identity from the authentication server. This call is not
126 * meant to be used by normal applications. This returns true if the
127 * identity was successfully added.
129 int ssh_remove_identity(AuthenticationConnection *auth, Key *key);
132 * Removes all identities from the authentication agent. This call is not
133 * meant to be used by normal applications. This returns true if the
134 * operation was successful.
136 int ssh_remove_all_identities(AuthenticationConnection *auth, int version);
138 #endif /* AUTHFD_H */