Initial revision
diff --git a/authfd.h b/authfd.h
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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 1.1 1999/10/27 03:42:43 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,
+ int *bitsp, 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,
+ int *bitsp, 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,
+ int bits, 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 */