Implemented public key subsystem.

Added public key list extension class for representing remote public key lists.
Added public key attribute extension class for remote public key attributes.

ssh2/session.pyx

@@ -22,13 +22,15 @@ from libc.time cimport time_t
 
 cimport c_ssh2
 cimport c_sftp
+cimport c_pkey
 from agent cimport PyAgent, auth_identity, clear_agent
 from channel cimport PyChannel
 from exceptions cimport SessionHandshakeError, SessionStartupError, \
     AgentConnectionError, AgentListIdentitiesError, AgentGetIdentityError, \
     AuthenticationError
 from listener cimport PyListener
 from sftp cimport PySFTP
+from publickey cimport PyPublicKeySystem
 from utils cimport to_bytes, to_str
 IF EMBEDDED_LIB:
     from fileinfo cimport FileInfo
@@ -531,3 +533,12 @@ cdef class Session:
                 self._session, _path, mode, size, mtime, atime)
         if channel is not NULL:
             return PyChannel(channel, self)
+
+    def publickey_init(self):
+        """Initialise public key subsystem for managing remote server
+        public keys"""
+        cdef c_pkey.LIBSSH2_PUBLICKEY *_pkey
+        with nogil:
+            _pkey= c_pkey.libssh2_publickey_init(self._session)
+        if _pkey is not NULL:
+            return PyPublicKeySystem(_pkey, self)

ssh2/sftp.pyx

@@ -58,6 +58,7 @@ ____________
 
 from libc.stdlib cimport malloc, free
 
+from session cimport Session
 cimport c_ssh2
 cimport c_sftp
 from error_codes cimport _LIBSSH2_ERROR_EAGAIN, _LIBSSH2_ERROR_BUFFER_TOO_SMALL
@@ -69,6 +70,7 @@ from sftp_handle cimport SFTPHandle, PySFTPHandle, SFTPAttributes, SFTPStatVFS
 # File types
 # TODO
 
+
 # File Transfer Flags
 
 LIBSSH2_FXF_READ = c_sftp.LIBSSH2_FXF_READ
@@ -78,6 +80,7 @@ LIBSSH2_FXF_CREAT = c_sftp.LIBSSH2_FXF_CREAT
 LIBSSH2_FXF_TRUNC = c_sftp.LIBSSH2_FXF_TRUNC
 LIBSSH2_FXF_EXCL = c_sftp.LIBSSH2_FXF_EXCL
 
+
 # File mode masks
 # Read, write, execute/search by owner
 LIBSSH2_SFTP_S_IRWXU = c_sftp.LIBSSH2_SFTP_S_IRWXU