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8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
4 | * All rights reserved | |
5260325f | 5 | * Functions to interface with the SSH_AUTHENTICATION_FD socket. |
6ae2364d | 6 | * |
bcbf86ec | 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". | |
5260325f | 12 | */ |
8efc0c15 | 13 | |
94ec8c6b | 14 | /* RCSID("$OpenBSD: authfd.h,v 1.13 2000/10/09 21:51:00 markus Exp $"); */ |
8efc0c15 | 15 | |
16 | #ifndef AUTHFD_H | |
17 | #define AUTHFD_H | |
18 | ||
19 | #include "buffer.h" | |
20 | ||
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 | |
31 | ||
94ec8c6b | 32 | /* private OpenSSH extensions for SSH2 */ |
4c8722d9 | 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 | |
4c8722d9 | 37 | #define SSH2_AGENTC_ADD_IDENTITY 17 |
38 | #define SSH2_AGENTC_REMOVE_IDENTITY 18 | |
39 | #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19 | |
40 | ||
94ec8c6b | 41 | /* additional error code for ssh.com's ssh-agent2 */ |
42 | #define SSH_COM_AGENT2_FAILURE 102 | |
43 | ||
188adeb2 | 44 | #define SSH_AGENT_OLD_SIGNATURE 0x01 |
45 | ||
46 | ||
5260325f | 47 | typedef struct { |
48 | int fd; | |
5260325f | 49 | Buffer identities; |
50 | int howmany; | |
51 | } AuthenticationConnection; | |
2e73a022 | 52 | |
8efc0c15 | 53 | /* Returns the number of the authentication fd, or -1 if there is none. */ |
5260325f | 54 | int ssh_get_authentication_socket(); |
8efc0c15 | 55 | |
aa3378df | 56 | /* |
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. | |
60 | */ | |
5260325f | 61 | void ssh_close_authentication_socket(int authfd); |
8efc0c15 | 62 | |
aa3378df | 63 | /* |
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(). | |
68 | */ | |
8efc0c15 | 69 | AuthenticationConnection *ssh_get_authentication_connection(); |
70 | ||
aa3378df | 71 | /* |
72 | * Closes the connection to the authentication agent and frees any associated | |
73 | * memory. | |
74 | */ | |
2e73a022 | 75 | void ssh_close_authentication_connection(AuthenticationConnection *auth); |
8efc0c15 | 76 | |
aa3378df | 77 | /* |
2e73a022 | 78 | * Returns the first authentication identity held by the agent or NULL if |
79 | * no identies are available. Caller must free comment and key. | |
80 | * Note that you cannot mix calls with different versions. | |
aa3378df | 81 | */ |
2e73a022 | 82 | Key *ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version); |
8efc0c15 | 83 | |
aa3378df | 84 | /* |
85 | * Returns the next authentication identity for the agent. Other functions | |
86 | * can be called between this and ssh_get_first_identity or two calls of this | |
2e73a022 | 87 | * function. This returns NULL if there are no more identities. The caller |
88 | * must free key and comment after a successful return. | |
aa3378df | 89 | */ |
2e73a022 | 90 | Key *ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version); |
8efc0c15 | 91 | |
2e73a022 | 92 | /* |
93 | * Requests the agent to decrypt the given challenge. Returns true if the | |
94 | * agent claims it was able to decrypt it. | |
95 | */ | |
6ae2364d | 96 | int |
2e73a022 | 97 | ssh_decrypt_challenge(AuthenticationConnection *auth, |
98 | Key *key, BIGNUM * challenge, | |
5260325f | 99 | unsigned char session_id[16], |
100 | unsigned int response_type, | |
101 | unsigned char response[16]); | |
8efc0c15 | 102 | |
2e73a022 | 103 | /* Requests the agent to sign data using key */ |
104 | int | |
105 | ssh_agent_sign(AuthenticationConnection *auth, | |
106 | Key *key, | |
107 | unsigned char **sigp, int *lenp, | |
108 | unsigned char *data, int datalen); | |
109 | ||
aa3378df | 110 | /* |
111 | * Adds an identity to the authentication server. This call is not meant to | |
112 | * be used by normal applications. This returns true if the identity was | |
113 | * successfully added. | |
114 | */ | |
6ae2364d | 115 | int |
2e73a022 | 116 | ssh_add_identity(AuthenticationConnection *auth, Key *key, |
aa3378df | 117 | const char *comment); |
8efc0c15 | 118 | |
aa3378df | 119 | /* |
120 | * Removes the identity from the authentication server. This call is not | |
121 | * meant to be used by normal applications. This returns true if the | |
122 | * identity was successfully added. | |
123 | */ | |
2e73a022 | 124 | int ssh_remove_identity(AuthenticationConnection *auth, Key *key); |
8efc0c15 | 125 | |
aa3378df | 126 | /* |
127 | * Removes all identities from the authentication agent. This call is not | |
128 | * meant to be used by normal applications. This returns true if the | |
129 | * operation was successful. | |
130 | */ | |
2e73a022 | 131 | int ssh_remove_all_identities(AuthenticationConnection *auth, int version); |
8efc0c15 | 132 | |
5260325f | 133 | #endif /* AUTHFD_H */ |