int
main(int argc, char *argv[])
{
struct cmd_syndesc *ts;
afs_int32 code;
#ifdef AFS_AIX32_ENV
/*
* The following signal action for AIX is necessary so that in case of a
* crash (i.e. core is generated) we can include the user's data section
* in the core dump. Unfortunately, by default, only a partial core is
* generated which, in many cases, isn't too useful.
*/
struct sigaction nsa;
sigemptyset(&nsa.sa_mask);
nsa.sa_handler = SIG_DFL;
nsa.sa_flags = SA_FULLDUMP;
sigaction(SIGABRT, &nsa, NULL);
sigaction(SIGSEGV, &nsa, NULL);
#endif
zero_argc = argc;
zero_argv = argv;
ts = cmd_CreateSyntax(NULL, CommandProc, NULL,
"obtain Kerberos authentication");
#define aXFLAG 0
#define aPRINCIPAL 1
#define aPASSWORD 2
#define aCELL 3
#define aSERVERS 4
#define aPIPE 5
#define aSILENT 6
#define aLIFETIME 7
#define aSETPAG 8
#define aTMP 9
cmd_AddParm(ts, "-x", CMD_FLAG, CMD_OPTIONAL, "(obsolete, noop)");
cmd_Seek(ts, aPRINCIPAL);
cmd_AddParm(ts, "-principal", CMD_SINGLE, CMD_OPTIONAL, "user name");
cmd_AddParm(ts, "-password", CMD_SINGLE, CMD_OPTIONAL, "user's password");
cmd_AddParm(ts, "-cell", CMD_SINGLE, CMD_OPTIONAL, "cell name");
cmd_AddParm(ts, "-servers", CMD_LIST, CMD_OPTIONAL,
"explicit list of servers");
cmd_AddParm(ts, "-pipe", CMD_FLAG, CMD_OPTIONAL,
"read password from stdin");
cmd_AddParm(ts, "-silent", CMD_FLAG, CMD_OPTIONAL, "silent operation");
cmd_AddParm(ts, "-lifetime", CMD_SINGLE, CMD_OPTIONAL,
"ticket lifetime in hh[:mm[:ss]]");
cmd_AddParm(ts, "-setpag", CMD_FLAG, CMD_OPTIONAL,
"Create a new setpag before authenticating");
cmd_AddParm(ts, "-tmp", CMD_FLAG, CMD_OPTIONAL,
"write Kerberos-style ticket file in /tmp");
code = cmd_Dispatch(argc, argv);
KLOGEXIT(code);
}
int
main(int argc, char *argv[])
{
struct cmd_syndesc *ts;
afs_int32 code;
#ifdef AFS_AIX32_ENV
/*
* The following signal action for AIX is necessary so that in case of a
* crash (i.e. core is generated) we can include the user's data section
* in the core dump. Unfortunately, by default, only a partial core is
* generated which, in many cases, isn't too useful.
*/
struct sigaction nsa;
sigemptyset(&nsa.sa_mask);
nsa.sa_handler = SIG_DFL;
nsa.sa_flags = SA_FULLDUMP;
sigaction(SIGABRT, &nsa, NULL);
sigaction(SIGSEGV, &nsa, NULL);
#endif
zero_argc = argc;
zero_argv = argv;
ts = cmd_CreateSyntax(NULL, CommandProc, NULL, 0,
"obtain Kerberos authentication");
#define aXFLAG 0
#define aPRINCIPAL 1
#define aPASSWORD 2
#define aCELL 3
#define aKRBREALM 4
#define aPIPE 5
#define aSILENT 6
#define aLIFETIME 7
#define aSETPAG 8
#define aTMP 9
#define aNOPRDB 10
#define aUNWRAP 11
#define aK5 12
#define aK4 13
cmd_AddParm(ts, "-x", CMD_FLAG, CMD_OPTIONAL, "obsolete, noop");
cmd_Seek(ts, aPRINCIPAL);
cmd_AddParm(ts, "-principal", CMD_SINGLE, CMD_OPTIONAL, "user name");
cmd_AddParm(ts, "-password", CMD_SINGLE, CMD_OPTIONAL, "user's password");
cmd_AddParm(ts, "-cell", CMD_SINGLE, CMD_OPTIONAL, "cell name");
cmd_AddParm(ts, "-k", CMD_SINGLE, CMD_OPTIONAL, "krb5 realm");
cmd_AddParm(ts, "-pipe", CMD_FLAG, CMD_OPTIONAL,
"read password from stdin");
cmd_AddParm(ts, "-silent", CMD_FLAG, CMD_OPTIONAL, "silent operation");
/* Note: -lifetime is not implemented in this version of klog. */
cmd_AddParm(ts, "-lifetime", CMD_SINGLE, CMD_OPTIONAL,
"ticket lifetime in hh[:mm[:ss]]");
cmd_AddParm(ts, "-setpag", CMD_FLAG, CMD_OPTIONAL,
"Create a new setpag before authenticating");
cmd_AddParm(ts, "-tmp", CMD_FLAG, CMD_OPTIONAL,
"write Kerberos-style ticket file in /tmp");
cmd_AddParm(ts, "-noprdb", CMD_FLAG, CMD_OPTIONAL, "don't consult pt");
cmd_AddParm(ts, "-unwrap", CMD_FLAG, CMD_OPTIONAL, "perform 524d conversion");
#ifdef AFS_RXK5
cmd_AddParm(ts, "-k5", CMD_FLAG, CMD_OPTIONAL, "get rxk5 credentials");
cmd_AddParm(ts, "-k4", CMD_FLAG, CMD_OPTIONAL, "get rxkad credentials");
#else
++ts->nParms; /* skip -k5 */
cmd_AddParm(ts, "-k4", CMD_FLAG, CMD_OPTIONAL|CMD_HIDDEN, 0);
#endif
code = cmd_Dispatch(argc, argv);
KLOGEXIT(code);
}
static int
CommandProc(struct cmd_syndesc *as, void *arock)
{
krb5_principal princ = 0;
char *cell, *pname, **hrealms, *service;
char service_temp[MAXKTCREALMLEN + 20];
krb5_creds incred[1], mcred[1], *outcred = 0, *afscred;
krb5_ccache cc = 0;
#ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
krb5_get_init_creds_opt *gic_opts;
#else
krb5_get_init_creds_opt gic_opts[1];
#endif
char *tofree = NULL, *outname;
int code;
char *what;
int i, dosetpag, evil, noprdb, id;
#ifdef AFS_RXK5
int authtype;
#endif
krb5_data enc_part[1];
krb5_prompter_fct pf = NULL;
char *pass = 0;
void *pa = 0;
struct kp_arg klog_arg[1];
char passwd[BUFSIZ];
struct afsconf_cell cellconfig[1];
static char rn[] = "klog"; /*Routine name */
static int Pipe = 0; /* reading from a pipe */
static int Silent = 0; /* Don't want error messages */
int writeTicketFile = 0; /* write ticket file to /tmp */
service = 0;
memset(incred, 0, sizeof *incred);
/* blow away command line arguments */
for (i = 1; i < zero_argc; i++)
memset(zero_argv[i], 0, strlen(zero_argv[i]));
zero_argc = 0;
memset(klog_arg, 0, sizeof *klog_arg);
/* first determine quiet flag based on -silent switch */
Silent = (as->parms[aSILENT].items ? 1 : 0);
if (Silent) {
afs_set_com_err_hook(silent_errors);
}
if ((code = krb5_init_context(&k5context))) {
afs_com_err(rn, code, "while initializing Kerberos 5 library");
KLOGEXIT(code);
}
if ((code = rx_Init(0))) {
afs_com_err(rn, code, "while initializing rx");
KLOGEXIT(code);
}
initialize_U_error_table();
/*initialize_krb5_error_table();*/
initialize_RXK_error_table();
initialize_KTC_error_table();
initialize_ACFG_error_table();
/* initialize_rx_error_table(); */
if (!(tdir = afsconf_Open(AFSDIR_CLIENT_ETC_DIRPATH))) {
afs_com_err(rn, 0, "can't get afs configuration (afsconf_Open(%s))",
AFSDIR_CLIENT_ETC_DIRPATH);
KLOGEXIT(1);
}
/*
* Enable DES enctypes, which are currently still required for AFS.
* krb5_allow_weak_crypto is MIT Kerberos 1.8. krb5_enctype_enable is
* Heimdal.
*/
#if defined(HAVE_KRB5_ENCTYPE_ENABLE)
i = krb5_enctype_valid(k5context, ETYPE_DES_CBC_CRC);
if (i)
krb5_enctype_enable(k5context, ETYPE_DES_CBC_CRC);
#elif defined(HAVE_KRB5_ALLOW_WEAK_CRYPTO)
krb5_allow_weak_crypto(k5context, 1);
#endif
/* Parse remaining arguments. */
dosetpag = !! as->parms[aSETPAG].items;
Pipe = !! as->parms[aPIPE].items;
writeTicketFile = !! as->parms[aTMP].items;
noprdb = !! as->parms[aNOPRDB].items;
evil = (always_evil&1) || !! as->parms[aUNWRAP].items;
#ifdef AFS_RXK5
authtype = 0;
if (as->parms[aK5].items)
authtype |= FORCE_RXK5;
if (as->parms[aK4].items)
authtype |= FORCE_RXKAD;
if (!authtype)
authtype |= env_afs_rxk5_default();
#endif
cell = as->parms[aCELL].items ? as->parms[aCELL].items->data : 0;
if ((code = afsconf_GetCellInfo(tdir, cell, "afsprot", cellconfig))) {
if (cell)
afs_com_err(rn, code, "Can't get cell information for '%s'", cell);
else
afs_com_err(rn, code, "Can't get determine local cell!");
KLOGEXIT(code);
}
if (as->parms[aKRBREALM].items) {
code = krb5_set_default_realm(k5context,
as->parms[aKRBREALM].items->data);
if (code) {
afs_com_err(rn, code, "Can't make <%s> the default realm",
as->parms[aKRBREALM].items->data);
KLOGEXIT(code);
}
}
else if ((code = krb5_get_host_realm(k5context, cellconfig->hostName[0], &hrealms))) {
afs_com_err(rn, code, "Can't get realm for host <%s> in cell <%s>\n",
cellconfig->hostName[0], cellconfig->name);
KLOGEXIT(code);
} else {
if (hrealms && *hrealms) {
code = krb5_set_default_realm(k5context,
*hrealms);
if (code) {
afs_com_err(rn, code, "Can't make <%s> the default realm",
*hrealms);
KLOGEXIT(code);
}
}
if (hrealms) krb5_free_host_realm(k5context, hrealms);
}
id = getuid();
if (as->parms[aPRINCIPAL].items) {
pname = as->parms[aPRINCIPAL].items->data;
} else {
/* No explicit name provided: use Unix uid. */
struct passwd *pw;
pw = getpwuid(id);
if (pw == 0) {
afs_com_err(rn, 0,
"Can't figure out your name from your user id (%d).", id);
if (!Silent)
fprintf(stderr, "%s: Try providing the user name.\n", rn);
KLOGEXIT(1);
}
pname = pw->pw_name;
}
code = krb5_parse_name(k5context, pname, &princ);
if (code) {
afs_com_err(rn, code, "Can't parse principal <%s>", pname);
KLOGEXIT(code);
}
if (as->parms[aPASSWORD].items) {
/*
* Current argument is the desired password string. Remember it in
* our local buffer, and zero out the argument string - anyone can
* see it there with ps!
*/
strncpy(passwd, as->parms[aPASSWORD].items->data, sizeof(passwd));
memset(as->parms[aPASSWORD].items->data, 0,
strlen(as->parms[aPASSWORD].items->data));
pass = passwd;
}
/* Get the password if it wasn't provided. */
if (!pass) {
if (Pipe) {
strncpy(passwd, getpipepass(), sizeof(passwd));
pass = passwd;
} else {
pf = klog_prompter;
pa = klog_arg;
}
}
service = 0;
#ifdef AFS_RXK5
if (authtype & FORCE_RXK5) {
tofree = get_afs_krb5_svc_princ(cellconfig);
snprintf(service_temp, sizeof service_temp, "%s", tofree);
} else
#endif
snprintf (service_temp, sizeof service_temp, "afs/%s", cellconfig->name);
klog_arg->pp = &pass;
klog_arg->pstore = passwd;
klog_arg->allocated = sizeof(passwd);
/* XXX should allow k5 to prompt in most cases -- what about expired pw?*/
#ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
code = krb5_get_init_creds_opt_alloc(k5context, &gic_opts);
if (code) {
afs_com_err(rn, code, "Can't allocate get_init_creds options");
KLOGEXIT(code);
}
#else
krb5_get_init_creds_opt_init(gic_opts);
#endif
for (;;) {
code = krb5_get_init_creds_password(k5context,
incred,
princ,
pass,
pf, /* prompter */
pa, /* data */
0, /* start_time */
0, /* in_tkt_service */
gic_opts);
if (code != KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN)
break;
}
memset(passwd, 0, sizeof(passwd));
if (code) {
char *r = 0;
if (krb5_get_default_realm(k5context, &r))
r = 0;
if (r)
afs_com_err(rn, code, "Unable to authenticate in realm %s", r);
else
afs_com_err(rn, code, "Unable to authenticate to use cell %s",
cellconfig->name);
if (r) free(r);
KLOGEXIT(code);
}
for (;;writeTicketFile = 0) {
if (writeTicketFile) {
what = "getting default ccache";
code = krb5_cc_default(k5context, &cc);
} else {
what = "krb5_cc_resolve";
code = krb5_cc_resolve(k5context, "MEMORY:core", &cc);
if (code) goto Failed;
}
what = "initializing ccache";
code = krb5_cc_initialize(k5context, cc, princ);
if (code) goto Failed;
what = "writing Kerberos ticket file";
code = krb5_cc_store_cred(k5context, cc, incred);
if (code) goto Failed;
if (writeTicketFile)
fprintf(stderr,
"Wrote ticket file to %s\n",
krb5_cc_get_name(k5context, cc));
break;
Failed:
if (code)
afs_com_err(rn, code, "%s", what);
if (writeTicketFile) {
if (cc) {
krb5_cc_close(k5context, cc);
cc = 0;
}
continue;
}
KLOGEXIT(code);
}
for (service = service_temp;;service = "afs") {
memset(mcred, 0, sizeof *mcred);
mcred->client = princ;
code = krb5_parse_name(k5context, service, &mcred->server);
if (code) {
afs_com_err(rn, code, "Unable to parse service <%s>\n", service);
KLOGEXIT(code);
}
if (tofree) { free(tofree); tofree = 0; }
if (!(code = krb5_unparse_name(k5context, mcred->server, &outname)))
tofree = outname;
else outname = service;
code = krb5_get_credentials(k5context, 0, cc, mcred, &outcred);
krb5_free_principal(k5context, mcred->server);
if (code != KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN || service != service_temp) break;
#ifdef AFS_RXK5
if (authtype & FORCE_RXK5)
break;
#endif
}
afscred = outcred;
if (code) {
afs_com_err(rn, code, "Unable to get credentials to use %s", outname);
KLOGEXIT(code);
}
#ifdef AFS_RXK5
if (authtype & FORCE_RXK5) {
struct ktc_principal aserver[1];
int viceid = 555;
memset(aserver, 0, sizeof *aserver);
strncpy(aserver->cell, cellconfig->name, MAXKTCREALMLEN-1);
code = ktc_SetK5Token(k5context, aserver, afscred, viceid, dosetpag);
if (code) {
afs_com_err(rn, code, "Unable to store tokens for cell %s\n",
cellconfig->name);
KLOGEXIT(1);
}
} else
#endif
{
struct ktc_principal aserver[1], aclient[1];
struct ktc_token atoken[1];
memset(atoken, 0, sizeof *atoken);
if (evil) {
size_t elen = enc_part->length;
atoken->kvno = RXKAD_TKT_TYPE_KERBEROS_V5_ENCPART_ONLY;
if (afs_krb5_skip_ticket_wrapper(afscred->ticket.data,
afscred->ticket.length, (char **) &enc_part->data,
&elen)) {
afs_com_err(rn, 0, "Can't unwrap %s AFS credential",
cellconfig->name);
KLOGEXIT(1);
}
} else {
atoken->kvno = RXKAD_TKT_TYPE_KERBEROS_V5;
*enc_part = afscred->ticket;
}
atoken->startTime = afscred->times.starttime;
atoken->endTime = afscred->times.endtime;
if (tkt_DeriveDesKey(get_creds_enctype(afscred),
get_cred_keydata(afscred),
get_cred_keylen(afscred), &atoken->sessionKey)) {
afs_com_err(rn, 0,
"Cannot derive DES key from enctype %i of length %u",
get_creds_enctype(afscred),
(unsigned)get_cred_keylen(afscred));
KLOGEXIT(1);
}
memcpy(atoken->ticket, enc_part->data,
atoken->ticketLen = enc_part->length);
memset(aserver, 0, sizeof *aserver);
strncpy(aserver->name, "afs", 4);
strncpy(aserver->cell, cellconfig->name, MAXKTCREALMLEN-1);
memset(aclient, 0, sizeof *aclient);
i = realm_len(k5context, afscred->client);
if (i > MAXKTCREALMLEN-1) i = MAXKTCREALMLEN-1;
memcpy(aclient->cell, realm_data(k5context, afscred->client), i);
if (!noprdb) {
int viceid = 0;
k5_to_k4_name(k5context, afscred->client, aclient);
code = whoami(atoken, cellconfig, aclient, &viceid);
if (code) {
afs_com_err(rn, code, "Can't get your viceid for cell %s", cellconfig->name);
*aclient->name = 0;
} else
snprintf(aclient->name, MAXKTCNAMELEN-1, "AFS ID %d", viceid);
}
if (!*aclient->name)
k5_to_k4_name(k5context, afscred->client, aclient);
code = ktc_SetToken(aserver, atoken, aclient, dosetpag);
if (code) {
afs_com_err(rn, code, "Unable to store tokens for cell %s\n",
cellconfig->name);
KLOGEXIT(1);
}
}
krb5_free_principal(k5context, princ);
krb5_free_cred_contents(k5context, incred);
if (outcred) krb5_free_creds(k5context, outcred);
if (cc)
krb5_cc_close(k5context, cc);
if (tofree) free(tofree);
return 0;
}
int
CommandProc(struct cmd_syndesc *as, void *arock)
{
char name[MAXKTCNAMELEN];
char instance[MAXKTCNAMELEN];
char cell[MAXKTCREALMLEN];
char realm[MAXKTCREALMLEN];
afs_uint32 serverList[MAXSERVERS];
char *lcell; /* local cellname */
char lrealm[MAXKTCREALMLEN]; /* uppercase copy of local cellname */
int code;
int i, dosetpag;
Date lifetime; /* requested ticket lifetime */
struct passwd pwent;
struct passwd *pw = &pwent;
struct passwd *lclpw = &pwent;
char passwd[BUFSIZ];
static char rn[] = "klog"; /*Routine name */
static int Pipe = 0; /* reading from a pipe */
static int Silent = 0; /* Don't want error messages */
int explicit; /* servers specified explicitly */
int local; /* explicit cell is same a local one */
int foundPassword = 0; /*Not yet, anyway */
int foundExplicitCell = 0; /*Not yet, anyway */
int writeTicketFile = 0; /* write ticket file to /tmp */
afs_int32 password_expires = -1;
char *reason; /* string describing errors */
/* blow away command line arguments */
for (i = 1; i < zero_argc; i++)
memset(zero_argv[i], 0, strlen(zero_argv[i]));
zero_argc = 0;
/* first determine quiet flag based on -silent switch */
Silent = (as->parms[aSILENT].items ? 1 : 0);
Pipe = (as->parms[aPIPE].items ? 1 : 0);
/* Determine if we should also do a setpag based on -setpag switch */
dosetpag = (as->parms[aSETPAG].items ? 1 : 0);
if (as->parms[aTMP].items) {
writeTicketFile = 1;
}
if (as->parms[aCELL].items) {
/*
* cell name explicitly mentioned; take it in if no other cell name
* has already been specified and if the name actually appears. If
* the given cell name differs from our own, we don't do a lookup.
*/
foundExplicitCell = 1;
strncpy(realm, as->parms[aCELL].items->data, sizeof(realm));
/* XXX the following is just a hack to handle the afscell environment XXX */
(void)afsconf_GetCellInfo((struct afsconf_dir *)0, realm, 0,
(struct afsconf_cell *)0);
}
code = ka_Init(0);
if (code || !(lcell = ka_LocalCell())) {
nocell:
if (!Silent)
afs_com_err(rn, code, "Can't get local cell name!");
KLOGEXIT(code);
}
if ((code = ka_CellToRealm(lcell, lrealm, 0)))
goto nocell;
strcpy(instance, "");
/* Parse our arguments. */
if (as->parms[aCELL].items) {
/*
* cell name explicitly mentioned; take it in if no other cell name
* has already been specified and if the name actually appears. If
* the given cell name differs from our own, we don't do a lookup.
*/
foundExplicitCell = 1;
strncpy(realm, as->parms[aCELL].items->data, sizeof(realm));
}
if (as->parms[aSERVERS].items) {
/* explicit server list */
int i;
struct cmd_item *ip;
char *ap[MAXSERVERS + 2];
for (ip = as->parms[aSERVERS].items, i = 2; ip; ip = ip->next, i++)
ap[i] = ip->data;
ap[0] = "";
ap[1] = "-servers";
code = ubik_ParseClientList(i, ap, serverList);
if (code) {
if (!Silent) {
afs_com_err(rn, code, "could not parse server list");
}
return code;
}
explicit = 1;
} else
