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support authentication indicators in GSSAPI #500

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Commits on Sep 9, 2024

  1. support authentication indicators in GSSAPI

    RFC 6680 defines a set of GSSAPI extensions to handle attributes
    associated with the GSSAPI names. MIT Kerberos and FreeIPA use
    name attributes to add information about pre-authentication methods used
    to acquire the initial Kerberos ticket. The attribute 'auth-indicators'
    may contain list of strings that KDC has associated with the ticket
    issuance process.
    
    Use authentication indicators to authorise or deny access to SSH server.
    GSSAPIIndicators setting allows to specify a list of possible indicators
    that a Kerberos ticket presented must or must not contain. More details
    on the syntax are provided in sshd_config(5) man page.
    
    Fixes: https://bugzilla.mindrot.org/show_bug.cgi?id=2696
    
    Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
    abbra committed Sep 9, 2024
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