NAME

SYNOPSIS

#include <u.h>
#include <libc.h>
#include <authsrv.h>

int authdial(char *netroot, char *ad);

int passtokey(char key[DESKEYLEN], char *password)

uchar nvcsum(void *mem, int len)

int readnvram(Nvrsafe *nv, int flag); int convT2M(Ticket *t, char *msg, char *key)

void convM2T(char *msg, Ticket *t, char *key)

int convA2M(Authenticator *a, char *msg, char *key)

void convM2A(char *msg, Authenticator *a, char *key)

int convTR2M(Ticketreq *tr, char *msg)

void convM2TR(char *msg, Ticketreq *tr)

int convPR2M(Passwordreq *pr, char *msg, char *key)

void convM2PR(char *msg, Passwordreq *pr, char *key)

int _asgetticket(int fd, char *trbuf, char *tbuf);

int _asrdresp(int fd, char *buf, int len);

DESCRIPTION

Passtokey converts password into a DES key and stores the result in key. It returns 0 if password could not be converted, and 1 otherwise.

Readnvram reads authentication information into the structure:

	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;
	};

On Sparc, MIPS, and SGI machines this information is in non-volatile ram, accessible in the file #r/nvram. On x86s and Alphas readnvram successively opens the following areas stopping with the first to succeed:

- the partition named by the $nvram environment variable
- the partition #S/sdC0/nvram
- a file called plan9.nvr in the partition #S/sdC0/9fat
- the partition #S/sd00/nvram
- a file called plan9.nvr in the partition #S/sd00/9fat
- a file called plan9.nvr on a DOS floppy in drive 0
- a file called plan9.nvr on a DOS floppy in drive 1

The nvcsums of the fields machkey, authid, and authdom must match their respective checksum or that field is zeroed. If flag is NVwrite or at least one checksum fails and flag is NVwriteonerr, readnvram will prompt for new values on #c/cons and then write them back to the storage area.

ConvT2M, convA2M, convTR2M, and convPR2M convert tickets, authenticators, ticket requests, and password change request structures into transmittable messages. ConvM2T, convM2A, convM2TR, and convM2PR are used to convert them back. Key is used for encrypting the message before transmission and decrypting after reception.

The routine _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.

The routine _asgetticket sends a ticket request message and then uses _asgetresp to recieve an answer.

SOURCE

SEE ALSO

DIAGNOSTICS