1 /* 2 * 3 * authfd.h 4 * 5 * Author: Tatu Ylonen <ylo@cs.hut.fi> 6 * 7 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 8 * All rights reserved 9 * 10 * Created: Wed Mar 29 01:17:41 1995 ylo 11 * 12 * Functions to interface with the SSH_AUTHENTICATION_FD socket. 13 * 14 */ 15 16 /* RCSID("$Id: authfd.h,v 1.6 1999/11/24 19:53:44 markus Exp $"); */ 17 18 #ifndef AUTHFD_H 19 #define AUTHFD_H 20 21 #include "buffer.h" 22 23 /* Messages for the authentication agent connection. */ 24 #define SSH_AGENTC_REQUEST_RSA_IDENTITIES 1 25 #define SSH_AGENT_RSA_IDENTITIES_ANSWER 2 26 #define SSH_AGENTC_RSA_CHALLENGE 3 27 #define SSH_AGENT_RSA_RESPONSE 4 28 #define SSH_AGENT_FAILURE 5 29 #define SSH_AGENT_SUCCESS 6 30 #define SSH_AGENTC_ADD_RSA_IDENTITY 7 31 #define SSH_AGENTC_REMOVE_RSA_IDENTITY 8 32 #define SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 33 34 typedef struct { 35 int fd; 36 Buffer packet; 37 Buffer identities; 38 int howmany; 39 } AuthenticationConnection; 40 /* Returns the number of the authentication fd, or -1 if there is none. */ 41 int ssh_get_authentication_socket(); 42 43 /* 44 * This should be called for any descriptor returned by 45 * ssh_get_authentication_socket(). Depending on the way the descriptor was 46 * obtained, this may close the descriptor. 47 */ 48 void ssh_close_authentication_socket(int authfd); 49 50 /* 51 * Opens and connects a private socket for communication with the 52 * authentication agent. Returns NULL if an error occurred and the 53 * connection could not be opened. The connection should be closed by the 54 * caller by calling ssh_close_authentication_connection(). 55 */ 56 AuthenticationConnection *ssh_get_authentication_connection(); 57 58 /* 59 * Closes the connection to the authentication agent and frees any associated 60 * memory. 61 */ 62 void ssh_close_authentication_connection(AuthenticationConnection * ac); 63 64 /* 65 * Returns the first authentication identity held by the agent. Returns true 66 * if an identity is available, 0 otherwise. The caller must initialize the 67 * integers before the call, and free the comment after a successful call 68 * (before calling ssh_get_next_identity). 69 */ 70 int 71 ssh_get_first_identity(AuthenticationConnection * connection, 72 BIGNUM * e, BIGNUM * n, char **comment); 73 74 /* 75 * Returns the next authentication identity for the agent. Other functions 76 * can be called between this and ssh_get_first_identity or two calls of this 77 * function. This returns 0 if there are no more identities. The caller 78 * must free comment after a successful return. 79 */ 80 int 81 ssh_get_next_identity(AuthenticationConnection * connection, 82 BIGNUM * e, BIGNUM * n, char **comment); 83 84 /* Requests the agent to decrypt the given challenge. Returns true if 85 the agent claims it was able to decrypt it. */ 86 int 87 ssh_decrypt_challenge(AuthenticationConnection * auth, 88 BIGNUM * e, BIGNUM * n, BIGNUM * challenge, 89 unsigned char session_id[16], 90 unsigned int response_type, 91 unsigned char response[16]); 92 93 /* 94 * Adds an identity to the authentication server. This call is not meant to 95 * be used by normal applications. This returns true if the identity was 96 * successfully added. 97 */ 98 int 99 ssh_add_identity(AuthenticationConnection * connection, RSA * key, 100 const char *comment); 101 102 /* 103 * Removes the identity from the authentication server. This call is not 104 * meant to be used by normal applications. This returns true if the 105 * identity was successfully added. 106 */ 107 int ssh_remove_identity(AuthenticationConnection * connection, RSA * key); 108 109 /* 110 * Removes all identities from the authentication agent. This call is not 111 * meant to be used by normal applications. This returns true if the 112 * operation was successful. 113 */ 114 int ssh_remove_all_identities(AuthenticationConnection * connection); 115 116 /* Closes the connection to the authentication agent. */ 117 void ssh_close_authentication(AuthenticationConnection * connection); 118 119 #endif /* AUTHFD_H */ 120