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#--
# =============================================================================
# Copyright (c) 2004,2005 Jamis Buck (jamis@37signals.com)
# All rights reserved.
#
# This source file is distributed as part of the Net::SSH Secure Shell Client
# library for Ruby. This file (and the library as a whole) may be used only as
# allowed by either the BSD license, or the Ruby license (or, by association
# with the Ruby license, the GPL). See the "doc" subdirectory of the Net::SSH
# distribution for the texts of these licenses.
# -----------------------------------------------------------------------------
# net-ssh website : http://net-ssh.rubyforge.org
# project website: http://rubyforge.org/projects/net-ssh
# =============================================================================
#++
module Net
module SSH
module Transport
# A cipher that does nothing but pass the data through, unchanged. This
# keeps things in the code nice and clean when a cipher has not yet been
# determined (i.e., during key exchange).
class IdentityCipher
# A default block size of 8 is required by the SSH2 protocol.
def block_size
8
end
# Does nothing. Returns self.
def encrypt
self
end
# Does nothing. Returns self.
def decrypt
self
end
# Passes its single argument through unchanged.
def update( text )
text
end
# Returns the empty string.
def final
""
end
# The name of this cipher, which is "identity".
def name
"identity"
end
end
end
end
end
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