Put ssh back into the repository
Change-Id: I23324372188fa6ed3f93a32b84365f5df6367590
diff --git a/authfd.h b/authfd.h
new file mode 100644
index 0000000..2582a27
--- /dev/null
+++ b/authfd.h
@@ -0,0 +1,94 @@
+/* $OpenBSD: authfd.h,v 1.37 2009/08/27 17:44:52 djm Exp $ */
+
+/*
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ * All rights reserved
+ * Functions to interface with the SSH_AUTHENTICATION_FD socket.
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ */
+
+#ifndef AUTHFD_H
+#define AUTHFD_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
+
+/* private OpenSSH extensions for SSH2 */
+#define SSH2_AGENTC_REQUEST_IDENTITIES 11
+#define SSH2_AGENT_IDENTITIES_ANSWER 12
+#define SSH2_AGENTC_SIGN_REQUEST 13
+#define SSH2_AGENT_SIGN_RESPONSE 14
+#define SSH2_AGENTC_ADD_IDENTITY 17
+#define SSH2_AGENTC_REMOVE_IDENTITY 18
+#define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
+
+/* smartcard */
+#define SSH_AGENTC_ADD_SMARTCARD_KEY 20
+#define SSH_AGENTC_REMOVE_SMARTCARD_KEY 21
+
+/* lock/unlock the agent */
+#define SSH_AGENTC_LOCK 22
+#define SSH_AGENTC_UNLOCK 23
+
+/* add key with constraints */
+#define SSH_AGENTC_ADD_RSA_ID_CONSTRAINED 24
+#define SSH2_AGENTC_ADD_ID_CONSTRAINED 25
+#define SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED 26
+
+#define SSH_AGENT_CONSTRAIN_LIFETIME 1
+#define SSH_AGENT_CONSTRAIN_CONFIRM 2
+
+/* extended failure messages */
+#define SSH2_AGENT_FAILURE 30
+
+/* additional error code for ssh.com's ssh-agent2 */
+#define SSH_COM_AGENT2_FAILURE 102
+
+#define SSH_AGENT_OLD_SIGNATURE 0x01
+
+typedef struct {
+ int fd;
+ Buffer identities;
+ int howmany;
+} AuthenticationConnection;
+
+int ssh_agent_present(void);
+int ssh_get_authentication_socket(void);
+void ssh_close_authentication_socket(int);
+
+AuthenticationConnection *ssh_get_authentication_connection(void);
+void ssh_close_authentication_connection(AuthenticationConnection *);
+int ssh_get_num_identities(AuthenticationConnection *, int);
+Key *ssh_get_first_identity(AuthenticationConnection *, char **, int);
+Key *ssh_get_next_identity(AuthenticationConnection *, char **, int);
+int ssh_add_identity_constrained(AuthenticationConnection *, Key *,
+ const char *, u_int, u_int);
+int ssh_remove_identity(AuthenticationConnection *, Key *);
+int ssh_remove_all_identities(AuthenticationConnection *, int);
+int ssh_lock_agent(AuthenticationConnection *, int, const char *);
+int ssh_update_card(AuthenticationConnection *, int, const char *,
+ const char *, u_int, u_int);
+
+int
+ssh_decrypt_challenge(AuthenticationConnection *, Key *, BIGNUM *, u_char[16],
+ u_int, u_char[16]);
+
+int
+ssh_agent_sign(AuthenticationConnection *, Key *, u_char **, u_int *, u_char *,
+ u_int);
+
+#endif /* AUTHFD_H */