src/usr.bin/ssh/auth-krb4.c - diff

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Diff for /src/usr.bin/ssh/Attic/auth-krb4.c between version 1.24 and 1.24.2.3

version 1.24, 2001/06/26 16:15:22

version 1.24.2.3, 2002/06/22 07:23:16

Line 49

const char *tkt_root = TKT_ROOT;

struct stat st;

int fd;

if (!authctxt->krb4_ticket_file) {

/* Set unique ticket string manually since we're still root. */

authctxt->krb4_ticket_file = xmalloc(MAXPATHLEN);

Line 57

if (lstat("/ticket", &st) != -1)

tkt_root = "/ticket/";

#endif /* AFS */

snprintf(authctxt->krb4_ticket_file, MAXPATHLEN, "%s%u_%d",

snprintf(authctxt->krb4_ticket_file, MAXPATHLEN, "%s%u_%ld",

tkt_root, authctxt->pw->pw_uid, getpid());

tkt_root, authctxt->pw->pw_uid, (long)getpid());

krb_set_tkt_string(authctxt->krb4_ticket_file);

}

/* Register ticket cleanup in case of fatal error. */

Line 79

}

/* Failure - cancel cleanup function, leaving ticket for inspection. */

log("WARNING: bad ticket file %s", authctxt->krb4_ticket_file);

fatal_remove_cleanup(krb4_cleanup_proc, authctxt);

cleanup_registered = 0;

xfree(authctxt->krb4_ticket_file);

authctxt->krb4_ticket_file = NULL;

return (0);

}

Line 103

char localhost[MAXHOSTNAMELEN], phost[INST_SZ], realm[REALM_SZ];

u_int32_t faddr;

int r;

if ((pw = authctxt->pw) == NULL)

return (0);

* Try Kerberos password authentication only for non-root

* users and only if Kerberos is installed.

Line 128

}

/* Successful authentication. */

chown(tkt_string(), pw->pw_uid, pw->pw_gid);

* Now that we have a TGT, try to get a local

* "rcmd" ticket to ensure that we are not talking

Line 138

strlcpy(phost, (char *)krb_get_phost(localhost),

sizeof(phost));

r = krb_mk_req(&tkt, KRB4_SERVICE_NAME, phost, realm, 33);

if (r == KSUCCESS) {

if ((hp = gethostbyname(localhost)) == NULL) {

log("Couldn't get local host address!");

Line 146

}

memmove((void *)&faddr, (void *)hp->h_addr,

sizeof(faddr));

/* Verify our "rcmd" ticket. */

r = krb_rd_req(&tkt, KRB4_SERVICE_NAME, phost,

faddr, &adata, "");

Line 186

} else

/* Logging in as root or no local Kerberos realm. */

debug("Unable to authenticate to Kerberos.");

failure:

krb4_cleanup_proc(authctxt);

if (!options.kerberos_or_local_passwd)

return (0);

/* Fall back to ordinary passwd authentication. */

return (-1);

}

Line 220

socklen_t slen;

u_int cksum;

int r, s;

s = packet_get_connection_in();

slen = sizeof(local);

memset(&local, 0, sizeof(local));

if (getsockname(s, (struct sockaddr *) & local, &slen) < 0)

Line 235

}

instance[0] = '*';

instance[1] = 0;

/* Get the encrypted request, challenge, and session key. */

if ((r = krb_rd_req(auth, KRB4_SERVICE_NAME, instance,

0, &adat, ""))) {

Line 243

return (0);

}

des_key_sched((des_cblock *) adat.session, schedule);

*client = xmalloc(MAX_K_NAME_SZ);

(void) snprintf(*client, MAX_K_NAME_SZ, "%s%s%s@%s", adat.pname,

*adat.pinst ? "." : "", adat.pinst, adat.prealm);

/* Check ~/.klogin authorization now. */

if (kuserok(&adat, authctxt->user) != KSUCCESS) {

log("Kerberos v4 .klogin authorization failed for %s to "

"account %s", *client, authctxt->user);

xfree(*client);

*client = NULL;

return (0);

}

/* Increment the checksum, and return it encrypted with the

session key. */

cksum = adat.checksum + 1;

cksum = htonl(cksum);

/* If we can't successfully encrypt the checksum, we send back an

empty message, admitting our failure. */

if ((r = krb_mk_priv((u_char *) & cksum, reply.dat, sizeof(cksum) + 1,

Line 269

Line 270

reply.length = 0;

} else

reply.length = r;

/* Clear session key. */

memset(&adat.session, 0, sizeof(&adat.session));

packet_start(SSH_SMSG_AUTH_KERBEROS_RESPONSE);

packet_put_string((char *) reply.dat, reply.length);

packet_send();

Line 287

Line 288

{

CREDENTIALS creds;

struct passwd *pw;

if ((pw = authctxt->pw) == NULL)

goto failure;

temporarily_use_uid(pw);

if (!radix_to_creds(string, &creds)) {

log("Protocol error decoding Kerberos v4 TGT");

goto failure;

}

if (strncmp(creds.service, "", 1) == 0) /* backward compatibility */

strlcpy(creds.service, "krbtgt", sizeof creds.service);

if (strcmp(creds.service, "krbtgt")) {

log("Kerberos v4 TGT (%s%s%s@%s) rejected for %s",

creds.pname, creds.pinst[0] ? "." : "", creds.pinst,

Line 308

Line 309

}

if (!krb4_init(authctxt))

goto failure;

if (in_tkt(creds.pname, creds.pinst) != KSUCCESS)

goto failure;

if (save_credentials(creds.service, creds.instance, creds.realm,

creds.session, creds.lifetime, creds.kvno, &creds.ticket_st,

creds.issue_date) != KSUCCESS) {

Line 320

Line 321

}

/* Successful authentication, passed all checks. */

chown(tkt_string(), pw->pw_uid, pw->pw_gid);

debug("Kerberos v4 TGT accepted (%s%s%s@%s)",

creds.pname, creds.pinst[0] ? "." : "", creds.pinst, creds.realm);

memset(&creds, 0, sizeof(creds));

restore_uid();

return (1);

failure:

krb4_cleanup_proc(authctxt);

memset(&creds, 0, sizeof(creds));

restore_uid();

return (0);

}

Line 343

Line 344

CREDENTIALS creds;

struct passwd *pw;

uid_t uid;

if ((pw = authctxt->pw) == NULL)

return (0);

if (!radix_to_creds(token_string, &creds)) {

log("Protocol error decoding AFS token");

return (0);

}

if (strncmp(creds.service, "", 1) == 0) /* backward compatibility */

strlcpy(creds.service, "afs", sizeof creds.service);

if (strncmp(creds.pname, "AFS ID ", 7) == 0)

uid = atoi(creds.pname + 7);

else

uid = pw->pw_uid;

if (kafs_settoken(creds.realm, uid, &creds)) {

log("AFS token (%s@%s) rejected for %s",

creds.pname, creds.realm, pw->pw_name);

Line 367

Line 368

}

debug("AFS token accepted (%s@%s)", creds.pname, creds.realm);

memset(&creds, 0, sizeof(creds));

return (1);

}

#endif /* AFS */