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DACSCOOKIE(1) DACS Commands Manual DACSCOOKIE(1)

NAME

dacscookie - create DACS credentials and emit as a cookie

SYNOPSIS

dacscookie [dacsoptions[1]] [-create] [-i ident] [-user user] [-ip ipaddr]
[-role role_str] [-expires date] [-ua str]
dacscookie [dacsoptions[1]] -decrypt [-concise]

DESCRIPTION

This program is part of the DACS suite.

The dacscookie utility constructs DACS credentials that represent a single DACS identity and emits them as the NAME=VALUE element of a HTTP cookie[2] (RFC 2109[3], RFC 2965[4], RFC 6265[5]) that may be used by DACS. It can also decode and display these cookies, provided the same encryption keys used to create the cookies are available. The program is useful for testing purposes, or by programs that perform authentication (e.g., by calling dacsauth(1)[6]) and need to return credentials. It may also be used to generate an identity "offline"; the resulting credentials could be used by applications other than standard Web browsers, or be distributed via any secure channel (e.g., encrypted email) for use by the recipient.

Configured or derived defaults are used if optional identity information is not provided.


Security

Only the DACS administrator should be able to successfully run this program. Because DACS keys and configuration files must be limited to the administrator, this will normally be the case, but a careful administrator will set file permissions to deny access to all other users, or even delete the binary.

Similarly, access to cookies generated by this program must be carefully controlled. Any jurisdiction within the same federation in which the credentials were created will be able to directly decrypt the credentials.

OPTIONS

dacscookie recognizes these options for cookie creation:

-create

Create the specified credentials and emit them to the standard output as the NAME=VALUE component of an HTTP cookie. This is the default.

-expires date

Set the expiry date for the cookie. If date begins with '+' and is followed by a digit string, the expiry date will be that number of seconds relative to the current time. Otherwise, the date is expected to be in one of the recognized formats (see concise syntax[7]). If not provided, the configured default value, AUTH_CREDENTIALS_DEFAULT_LIFETIME_SECS[8], will be used.

-i ident

The identity (ident) is given in the concise syntax[7]. Note that any elements that are explicitly given will override those that appear in ident.

-ip ipaddr

Use ipaddr as the user's IP address (in standard dot notation). If not provided, this element will be obtained from any -i flag or else omitted from the credentials.

-role role_str

Use role_str as the user's role string, which must be syntactically correct. If not provided, this element will be obtained from any -i flag or else omitted from the credentials.

-ua str

Use str as the user agent string associated with the credentials. If no string is specified, the credentials cannot be verified against a user agent string. See dacs.conf(5)[9].

-user name

Use name, a syntactically correct username, within the applicable jurisdiction. If not provided, this element must be specified using the -i flag.

dacscookie recognizes these options for cookie decryption:

-decrypt

Instead of creating credentials, read a cookie from the standard input and print its decoded contents to the standard output. If the input is invalid in any way, a message is displayed.

-concise

With the -decrypt flag, only print the identity in the concise user syntax[7].

EXAMPLES

The following will generate an identity and store it in a file: 

% dacscookie -u j1.example.com -user bobo > cookie.out
% chmod 0600 cookie.out

The following will display various elements of the credentials to stdout:

% dacscookie -u j1.example.com -decrypt < cookie.out
% rm cookie.out

DIAGNOSTICS

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

SEE ALSO

dacs_auth_agent(8)[10], dacs_auth_transfer(8)[11], dacs_authenticate(8)[12], dacsauth(1)[6], dacscred(1)[13], dacs_current_credentials(8)[14].

AUTHOR

Distributed Systems Software (www.dss.ca[15])

COPYING

Copyright © 2003-2015 Distributed Systems Software. See the LICENSE[16] file that accompanies the distribution for licensing information.

NOTES

1.
dacsoptions
http://dacs.dss.ca/man/dacs.1.html#dacsoptions
2.
HTTP cookie
http://web.archive.org/web/20070805052634/http://wp.netscape.com/newsref/std/cookie_spec.html
3.
RFC 2109
http://www.rfc-editor.org/rfc/rfc2109.txt
4.
RFC 2965
http://www.rfc-editor.org/rfc/rfc2965.txt
5.
RFC 6265
http://www.rfc-editor.org/rfc/rfc6265.txt
6.
dacsauth(1)
http://dacs.dss.ca/man/dacsauth.1.html
7.
concise syntax
http://dacs.dss.ca/man/dacs.1.html#concise_user_syntax
8.
AUTH_CREDENTIALS_DEFAULT_LIFETIME_SECS
http://dacs.dss.ca/man/dacs.conf.5.html#AUTH_CREDENTIALS_DEFAULT_LIFETIME_SECS
9.
dacs.conf(5)
http://dacs.dss.ca/man/dacs.conf.5.html#VERIFY_UA
10.
dacs_auth_agent(8)
http://dacs.dss.ca/man/dacs_auth_agent.8.html
11.
dacs_auth_transfer(8)
http://dacs.dss.ca/man/dacs_auth_transfer.8.html
12.
dacs_authenticate(8)
http://dacs.dss.ca/man/dacs_authenticate.8.html
13.
dacscred(1)
http://dacs.dss.ca/man/dacscred.1.html
14.
dacs_current_credentials(8)
http://dacs.dss.ca/man/dacs_current_credentials.8.html
15.
www.dss.ca
http://www.dss.ca
16.
LICENSE
http://dacs.dss.ca/man/../misc/LICENSE
02/19/2019 DACS 1.4.40