dacscred

DACSCRED(1)                  DACS Commands Manual                  DACSCRED(1)



NAME
       dacscred - acquire and manage DACS credentials

SYNOPSIS
       dacscred [-dd dir] [-ll log_level] [-v] op [opargs]

DESCRIPTION
       This program is part of the DACS suite.

       The dacscred utility supports simple DACS authentication, optionally
       storing the returned DACS identities securely for future use by
       non-browser applications. Basic maintenance operations are provided for
       this cache of credentials.

       DACS per-user information, including the cache, is kept within a
       directory that must be owned by the user. Additionally, the directory
       must be accessible only by the user.  DACS will refuse to use any
       per-user information if file permissions are inappropriate.

       If this directory is not specified on the command line, the following
       is the default behaviour. If an environment variable named DACSDIR is
       available, its value is used for the name of this directory; otherwise,
       DACS will use a directory named .dacs in the user's home directory.

       The contents of the cache file are encrypted. A password must be
       provided when the cache is created and before each subsequent access.
       Currently, AES-128-CFB is used along with a SHA1-based HMAC[1].

           Security
           A jurisdiction may reject credentials that are used from an IP
           address that does not match the IP address from which the
           credentials were initially requested (see the VERIFY_IP
           configuration directive). This means that if a cache is moved to a
           different host, the credentials may be treated as invalid if they
           are used from that host.

OPTIONS
       The following command line flags are common to all operations:

       -dd directory
           The DACS directory to use instead of the default is directory.

       -ll log_level
           Set the debugging output level to log_level (see dacs(1)[2]). The
           default level is warn.

       -v
           The -v flag bumps the debugging output level to debug or (if
           repeated) trace.

       The op argument specifies the operation to be performed. The following
       operations are available:


           Try to authenticate as username by invoking dacs_authenticate[3] at
           the URL auth-URL.  username has the syntax
           [[federation]::]jurisdiction:username (the jurisdiction component
           of the name must be provided; see dacs(1)[4]). An SSL connection is
           always used for this purpose.

           If authentication is successful and the -s flag is not given, the
           (username, auth-URL) pair will be recorded; subsequent invocations
           of the command can omit the auth-URL argument if it is unchanged.
           If the -p flag is given, the user is prompted for a password to
           pass to dacs_authenticate; if -pf is given instead, a password is
           read from file (stdin is read if file is "-"). If aux is given, it
           is used as the value of the AUXILIARY argument to
           dacs_authenticate. The -caf (-ccf) flag identifies file as a file
           of CA certificates (client certificates) in PEM format,
           respectively; see sslclient(1)[5].

           New credentials replace old credentials in the cache. Credentials
           and authentication mappings in the cache are not automatically
           managed, so the cache may contain credentials that have expired.

           The following example prompts the user for a password before trying
           to authenticate as DSS:smith:

               % dacscred auth -p DSS:smith \
                   https://dss.example.com/cgi-bin/dacs/dacs_authenticate

           The following example might be used within a script to test if
           $passwd is the correct password for DSS:smith:

               % echo $passwd | dacscred auth -s -pf - DSS:smith \
                   https://dss.example.com/cgi-bin/dacs/dacs_authenticate

           The exit status will be 0 only if the password is correct.


           Delete all credentials with a name that matches a regular
           expression (see regex(3)[6]).


           Print all credentials to stdout that should be sent along with a
           service request to the given URL. If no URL is given, print all
           credentials in the cache. Note that these credentials represent
           DACS identities and should be kept secret.


           List the names of all credentials in the cache, by default. This is
           equivalent to providing the cred argument. If the auth argument is
           given, a list of identities and the auth-URL arguments that were
           used to authenticate those identities is displayed. If a regex is
           given, the list is limited to those identities matched by it (cred
           behaviour) or those "usernameauth-URL" strings that match it (auth
           behaviour).


           Change the password that protects the cache. The current password
           must first be provided.

DIAGNOSTICS
       The program exits 0 if everything was fine, 1 if an error occurred.

BUGS
       This command only supplies partial support for interacting with
       dacs_authenticate.

SEE ALSO
       dacs_authenticate(8)[3]

AUTHOR
       Distributed Systems Software (www.dss.ca[7])

COPYING
       Copyright2003-2013 Distributed Systems Software. See the LICENSE[8]
       file that accompanies the distribution for licensing information.

NOTES
        1. HMAC
           http://www.rfc-editor.org/rfc/rfc2104.txt

        2. dacs(1)
           http://dacs.dss.ca/man/dacs.1.html

        3. dacs_authenticate
           http://dacs.dss.ca/man/dacs_authenticate.8.html

        4. dacs(1)
           http://dacs.dss.ca/man/dacs.1.html#naming

        5. sslclient(1)
           http://dacs.dss.ca/man/sslclient.1.html

        6. regex(3)
           http://www.freebsd.org/cgi/man.cgi?query=regex&apropos=0&sektion=3&manpath=FreeBSD+9.1-RELEASE&format=html

        7. www.dss.ca
           http://www.dss.ca

        8. LICENSE
           http://dacs.dss.ca/man/../misc/LICENSE



DACS 1.4.28b                      02/04/2014                       DACSCRED(1)