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- @c -*-texinfo-*-
- @c This file is part of Guile-SSH Reference Manual.
- @c Copyright (C) 2014 Artyom V. Poptsov
- @c See the file guile-ssh.texi for copying conditions.
- @node Auth
- @section Auth
- @cindex authentication
- The @code{(ssh auth)} module provides authentication procedures for a
- Guile-SSH client.
- Please note that you must specify a username either on creation of a
- session or by @code{session-set!} call (@pxref{Sessions}) before
- calling of procedures from this section.
- Also @strong{note} that the session must be connected before calling to these
- procedures, otherwise the @code{wrong-type-arg} exception will be thrown.
- @deffn {Scheme Procedure} userauth-public-key! session private-key
- Try to authenticate with a public/private key.
- Return one of the following symbols:
- @table @samp
- @item success
- Authentication success.
- @item partial
- You've been partially authenticated, you still have to use another
- method.
- @item denied
- Authentication failed: use another method.
- @item error
- A serious error happened.
- @end table
- @end deffn
- @deffn {Scheme Procedure} userauth-public-key/auto! session
- @cindex authentication with a SSH agent
- Try to automatically authenticate with @code{none} method first and
- then with public keys. The procedure will try to get a cached private
- key from a @acronym{SSH} agent and if it fails it will try to read a
- key from a file. If the key is encrypted the user will be asked for a
- passphrase.
- Return one of the following symbols:
- @table @samp
- @item success
- Authentication success.
- @item partial
- You've been partially authenticated, you still have to use another
- method.
- @item denied
- Authentication failed: use another method.
- @item error
- A serious error happened.
- @end table
- @end deffn
- @deffn {Scheme Procedure} userauth-public-key/try session public-key
- Try to authenticate with the given @var{public-key}.
- To avoid unnecessary processing and user interaction, the following
- method is provided for querying whether authentication using the
- @var{public-key} would be possible.
- Return one of the following symbols:
- @table @samp
- @item success
- The public key is accepted, you want now to use
- @code{userauth-public-key!}.
- @item partial
- You've been partially authenticated, you still have to use another
- method.
- @item denied
- Authentication failed: use another method.
- @item error
- A serious error happened.
- @end table
- @end deffn
- @deffn {Scheme Procedure} userauth-agent! session
- Try to do public key authentication with ssh agent.
- Return one of the following symbols:
- @table @samp
- @item success
- Authentication success.
- @item partial
- You've been partially authenticated, you still have to use another
- method.
- @item denied
- Authentication failed: use another method.
- @item error
- A serious error happened.
- @end table
- @end deffn
- @deffn {Scheme Procedure} userauth-password! session password
- Try to authenticate by @var{password}.
- Return one of the following symbols:
- @table @samp
- @item success
- Authentication success.
- @item partial
- You've been partially authenticated, you still have to use another
- method.
- @item denied
- Authentication failed: use another method.
- @item error
- A serious error happened.
- @item again
- In nonblocking mode, you've got to call this again later.
- @end table
- @end deffn
- @deffn {Scheme Procedure} userauth-none! session
- Try to authenticate through the @code{none} method.
- Return one of the following symbols:
- @table @samp
- @item success
- Authentication success.
- @item partial
- You've been partially authenticated, you still have to use another method.
- @item again
- In nonblocking mode, you've got to call this again later.
- @item denied
- Authentication failed: use another method.
- @item error
- A serious error happened.
- @end table
- @end deffn
- @deffn {Scheme Procedure} userauth-get-list session
- Get available authentication methods for a @var{session}. Return list
- of available methods.
- This call will block, even in nonblocking mode, if run for the first
- time before a (complete) call to @code{userauth-none!}.
- Possible methods are: @code{password}, @code{public-key},
- @code{host-based}, @code{interactive}.
- @end deffn
- @c Local Variables:
- @c TeX-master: "guile-ssh.texi"
- @c End:
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