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authorrsc <devnull@localhost>2005-01-03 06:40:20 +0000
committerrsc <devnull@localhost>2005-01-03 06:40:20 +0000
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-.TH AUTHSRV 3
-.SH NAME
-authdial, passtokey, nvcsum, readnvram, convT2M, convM2T, convTR2M, convM2TR, convA2M, convM2A, convPR2M, convM2PR, _asgetticket, _asrdresp \- routines for communicating with authentication servers
-.SH SYNOPSIS
-.nf
-.PP
-.ft L
-#include <u.h>
-#include <libc.h>
-#include <authsrv.h>
-.fi
-.ta 8n +4n +4n +4n +4n +4n +4n
-.PP
-.B
-int authdial(char *netroot, char *ad);
-.PP
-.B
-int passtokey(char key[DESKEYLEN], char *password)
-.PP
-.B
-uchar nvcsum(void *mem, int len)
-.PP
-.B
-int readnvram(Nvrsafe *nv, int flag);
-.PPP
-.B
-int convT2M(Ticket *t, char *msg, char *key)
-.PP
-.B
-void convM2T(char *msg, Ticket *t, char *key)
-.PP
-.B
-int convA2M(Authenticator *a, char *msg, char *key)
-.PP
-.B
-void convM2A(char *msg, Authenticator *a, char *key)
-.PP
-.B
-int convTR2M(Ticketreq *tr, char *msg)
-.PP
-.B
-void convM2TR(char *msg, Ticketreq *tr)
-.PP
-.B
-int convPR2M(Passwordreq *pr, char *msg, char *key)
-.PP
-.B
-void convM2PR(char *msg, Passwordreq *pr, char *key)
-.PP
-.B
-int _asgetticket(int fd, char *trbuf, char *tbuf);
-.PP
-.B
-int _asrdresp(int fd, char *buf, int len);
-.SH DESCRIPTION
-.PP
-.I Authdial
-dials an authentication server over the
-network rooted at
-.IR net ,
-default
-.BR /net .
-The authentication domain,
-.IR ad ,
-specifies which server to call.
-If
-.I ad
-is non-nil,
-the connection server
-.B cs
-(see
-.IR ndb (8))
-is queried for an entry which contains
-.B authdom=\fIad\fP
-or
-.BR dom=\fIad\fP ,
-the former having precedence,
-and which also contains an
-.B auth
-attribute.
-The string dialed is then
-.I netroot\fP!\fIserver\fP!ticket
-where
-.I server
-is the value of the
-.B auth
-attribute.
-If no entry is found, the error string is
-set to ``no authentication server found''
-and -1 is returned.
-If
-.I authdom
-is nil, the string
-.IB netroot !$auth! ticket
-is used to make the call.
-.PP
-.I Passtokey
-converts
-.I password
-into a DES key and stores the result in
-.IR key .
-It returns 0 if
-.I password
-could not be converted,
-and 1 otherwise.
-.PP
-.I Readnvram
-reads authentication information into the structure:
-.EX
-.ta 4n +4n +8n +4n +4n +4n +4n
- struct Nvrsafe
- {
- char machkey[DESKEYLEN];
- uchar machsum;
- char authkey[DESKEYLEN];
- uchar authsum;
- char config[CONFIGLEN];
- uchar configsum;
- char authid[ANAMELEN];
- uchar authidsum;
- char authdom[DOMLEN];
- uchar authdomsum;
- };
-.EE
-.PP
-On Sparc, MIPS, and SGI machines this information is
-in non-volatile ram, accessible in the file
-.BR #r/nvram .
-On x86s and Alphas
-.I readnvram
-successively opens the following areas stopping with the
-first to succeed:
-.PP
-\- the partition named by the
-.B $nvram
-environment variable
-(commonly set via
-.IR plan9.ini (8))
-.br
-\- the partition
-.B #S/sdC0/nvram
-.br
-\- a file called
-.B plan9.nvr
-in the partition
-.B #S/sdC0/9fat
-.br
-\- the partition
-.B #S/sd00/nvram
-.br
-\- a file called
-.B plan9.nvr
-in the partition
-.B #S/sd00/9fat
-.br
-\- a file called
-.B plan9.nvr
-on a DOS floppy in drive 0
-.br
-\- a file called
-.B plan9.nvr
-on a DOS floppy in drive 1
-.PP
-The
-.IR nvcsum s
-of the fields
-.BR machkey ,
-.BR authid ,
-and
-.B authdom
-must match their respective checksum or that field is zeroed.
-If
-.I flag
-is
-.B NVwrite
-or at least one checksum fails and
-.I flag
-is
-.BR NVwriteonerr ,
-.I readnvram
-will prompt for new values on
-.B #c/cons
-and then write them back to the storage area.
-.PP
-.IR ConvT2M ,
-.IR convA2M ,
-.IR convTR2M ,
-and
-.I convPR2M
-convert tickets, authenticators, ticket requests, and password change request
-structures into transmittable messages.
-.IR ConvM2T ,
-.IR convM2A ,
-.IR convM2TR ,
-and
-.I convM2PR
-are used to convert them back.
-.I Key
-is used for encrypting the message before transmission and decrypting
-after reception.
-.PP
-The routine
-.I _asgetresp
-receives either a character array or an error string.
-On error, it sets errstr and returns -1. If successful,
-it returns the number of bytes received.
-.PP
-The routine
-.I _asgetticket
-sends a ticket request message and then uses
-.I _asgetresp
-to recieve an answer.
-.SH SOURCE
-.B /usr/local/plan9/src/libauthsrv
-.SH SEE ALSO
-.IR passwd (1),
-.IR cons (3),
-.IR dial (3),
-.IR authsrv (6),
-.SH DIAGNOSTICS
-These routines set
-.IR errstr .
-Integer-valued functions return -1 on error.