#include "krb5_locl.h"
#include <assert.h>
static krb5_error_code
get_cred_kdc_capath(krb5_context, krb5_kdc_flags,
krb5_ccache, krb5_creds *, krb5_principal,
Ticket *, const char *, krb5_creds **, krb5_creds ***);
krb5_error_code
_krb5_get_krbtgt(krb5_context context,
krb5_ccache id,
krb5_realm realm,
krb5_creds **cred)
{
krb5_error_code ret;
krb5_creds tmp_cred;
memset(&tmp_cred, 0, sizeof(tmp_cred));
ret = krb5_cc_get_principal(context, id, &tmp_cred.client);
if (ret)
return ret;
ret = krb5_make_principal(context,
&tmp_cred.server,
realm,
KRB5_TGS_NAME,
realm,
NULL);
if(ret) {
krb5_free_principal(context, tmp_cred.client);
return ret;
}
ret = krb5_get_credentials(context,
KRB5_GC_CACHED,
id,
&tmp_cred,
cred);
krb5_free_principal(context, tmp_cred.client);
krb5_free_principal(context, tmp_cred.server);
if(ret)
return ret;
return 0;
}
static krb5_error_code
get_cred_kdc(krb5_context context,
krb5_ccache id,
krb5_kdc_flags flags,
krb5_addresses *addresses,
krb5_creds *in_creds,
krb5_creds *krbtgt,
krb5_principal impersonate_principal,
Ticket *second_ticket,
const char *kdc_hostname,
krb5_creds *out_creds)
{
TGS_REQ req;
krb5_data enc;
krb5_data resp;
krb5_kdc_rep rep;
KRB_ERROR error;
krb5_error_code ret;
unsigned nonce;
krb5_keyblock *subkey = NULL;
size_t len = 0;
Ticket second_ticket_data;
krb5_deltat offset;
METHOD_DATA padata;
krb5_data_zero(&resp);
krb5_data_zero(&enc);
padata.val = NULL;
padata.len = 0;
krb5_generate_random_block(&nonce, sizeof(nonce));
nonce &= 0xffffffff;
if(flags.b.enc_tkt_in_skey && second_ticket == NULL){
ret = decode_Ticket(in_creds->second_ticket.data,
in_creds->second_ticket.length,
&second_ticket_data, &len);
if(ret)
return ret;
second_ticket = &second_ticket_data;
}
ret = krb5_cc_get_kdc_offset(context, id, &offset);
if (ret == 0) {
context->kdc_sec_offset = (uint32_t)offset;
context->kdc_usec_offset = 0;
}
ret = _krb5_init_tgs_req (context,
id,
addresses,
flags,
impersonate_principal,
second_ticket,
in_creds,
krbtgt,
nonce,
&padata,
&subkey,
&req);
if (ret)
goto out;
ASN1_MALLOC_ENCODE(TGS_REQ, enc.data, enc.length, &req, &len, ret);
if (ret)
goto out;
if(enc.length != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
req.req_body.addresses = NULL;
free_TGS_REQ(&req);
{
krb5_sendto_ctx stctx;
ret = krb5_sendto_ctx_alloc(context, &stctx);
if (ret)
return ret;
krb5_sendto_ctx_set_func(stctx, _krb5_kdc_retry, NULL);
if (kdc_hostname)
krb5_sendto_set_hostname(context, stctx, kdc_hostname);
ret = krb5_sendto_context (context, stctx, &enc,
krbtgt->server->name.name_string.val[1],
&resp);
krb5_sendto_ctx_free(context, stctx);
}
if(ret)
goto out;
memset(&rep, 0, sizeof(rep));
if(decode_TGS_REP(resp.data, resp.length, &rep.kdc_rep, &len) == 0) {
unsigned eflags = 0;
ret = krb5_copy_principal(context,
in_creds->client,
&out_creds->client);
if(ret)
goto out2;
ret = krb5_copy_principal(context,
in_creds->server,
&out_creds->server);
if(ret)
goto out2;
out_creds->times.endtime = in_creds->times.endtime;
if (flags.b.constrained_delegation || impersonate_principal)
eflags |= EXTRACT_TICKET_ALLOW_CNAME_MISMATCH;
ret = _krb5_extract_ticket(context,
&rep,
out_creds,
&krbtgt->session,
0,
&krbtgt->addresses,
nonce,
eflags,
NULL,
_krb5_decrypt_tkt_with_subkey,
subkey);
out2:
krb5_free_kdc_rep(context, &rep);
} else if(krb5_rd_error(context, &resp, &error) == 0) {
ret = krb5_error_from_rd_error(context, &error, in_creds);
krb5_free_error_contents(context, &error);
} else if(resp.length > 0 && ((char*)resp.data)[0] == 4) {
ret = KRB5KRB_AP_ERR_V4_REPLY;
krb5_clear_error_message(context);
} else {
ret = KRB5KRB_AP_ERR_MSG_TYPE;
krb5_clear_error_message(context);
}
out:
if (second_ticket == &second_ticket_data)
free_Ticket(&second_ticket_data);
free_METHOD_DATA(&padata);
krb5_data_free(&resp);
krb5_data_free(&enc);
if(subkey)
krb5_free_keyblock(context, subkey);
return ret;
}
static krb5_error_code
get_cred_kdc_address(krb5_context context,
krb5_ccache id,
krb5_kdc_flags flags,
krb5_addresses *addrs,
krb5_creds *in_creds,
krb5_creds *krbtgt,
krb5_principal impersonate_principal,
Ticket *second_ticket,
const char *kdc_hostname,
krb5_creds *out_creds)
{
krb5_error_code ret;
krb5_addresses addresses = { 0, NULL };
if (addrs == NULL && krbtgt->addresses.len != 0) {
krb5_boolean noaddr;
krb5_appdefault_boolean(context, NULL, krbtgt->server->realm,
"no-addresses", FALSE, &noaddr);
if (!noaddr) {
krb5_get_all_client_addrs(context, &addresses);
addrs = &addresses;
if(addresses.len == 0)
addrs = NULL;
}
}
ret = get_cred_kdc(context, id, flags, addrs, in_creds,
krbtgt, impersonate_principal,
second_ticket, kdc_hostname, out_creds);
krb5_free_addresses(context, &addresses);
return ret;
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_kdc_cred(krb5_context context,
krb5_ccache id,
krb5_kdc_flags flags,
krb5_addresses *addresses,
Ticket *second_ticket,
krb5_creds *in_creds,
krb5_creds **out_creds
)
{
krb5_error_code ret;
krb5_creds *krbtgt;
*out_creds = calloc(1, sizeof(**out_creds));
if(*out_creds == NULL) {
krb5_set_error_message(context, ENOMEM,
N_("malloc: out of memory", ""));
return ENOMEM;
}
ret = _krb5_get_krbtgt (context,
id,
in_creds->server->realm,
&krbtgt);
if(ret) {
free(*out_creds);
*out_creds = NULL;
return ret;
}
ret = get_cred_kdc(context, id, flags, addresses,
in_creds, krbtgt, NULL, NULL, NULL, *out_creds);
krb5_free_creds (context, krbtgt);
if(ret) {
free(*out_creds);
*out_creds = NULL;
}
return ret;
}
static int
not_found(krb5_context context, krb5_const_principal p, krb5_error_code code)
{
krb5_error_code ret;
char *str;
ret = krb5_unparse_name(context, p, &str);
if(ret) {
krb5_clear_error_message(context);
return code;
}
krb5_set_error_message(context, code,
N_("Matching credential (%s) not found", ""), str);
free(str);
return code;
}
static krb5_error_code
find_cred(krb5_context context,
krb5_ccache id,
krb5_principal server,
krb5_creds **tgts,
krb5_creds *out_creds)
{
krb5_error_code ret;
krb5_creds mcreds;
krb5_cc_clear_mcred(&mcreds);
mcreds.server = server;
ret = krb5_cc_retrieve_cred(context, id, KRB5_TC_DONT_MATCH_REALM,
&mcreds, out_creds);
if(ret == 0)
return 0;
while(tgts && *tgts){
if(krb5_compare_creds(context, KRB5_TC_DONT_MATCH_REALM,
&mcreds, *tgts)){
ret = krb5_copy_creds_contents(context, *tgts, out_creds);
return ret;
}
tgts++;
}
return not_found(context, server, KRB5_CC_NOTFOUND);
}
static krb5_error_code
add_cred(krb5_context context, krb5_creds const *tkt, krb5_creds ***tgts)
{
int i;
krb5_error_code ret;
krb5_creds **tmp = *tgts;
for(i = 0; tmp && tmp[i]; i++);
tmp = realloc(tmp, (i+2)*sizeof(*tmp));
if(tmp == NULL) {
krb5_set_error_message(context, ENOMEM,
N_("malloc: out of memory", ""));
return ENOMEM;
}
*tgts = tmp;
ret = krb5_copy_creds(context, tkt, &tmp[i]);
tmp[i+1] = NULL;
return ret;
}
static krb5_error_code
get_cred_kdc_capath_worker(krb5_context context,
krb5_kdc_flags flags,
krb5_ccache ccache,
krb5_creds *in_creds,
krb5_const_realm try_realm,
krb5_principal impersonate_principal,
Ticket *second_ticket,
const char *kdc_hostname,
krb5_creds **out_creds,
krb5_creds ***ret_tgts)
{
krb5_error_code ret;
krb5_creds *tgt, tmp_creds;
krb5_const_realm client_realm, server_realm;
int ok_as_delegate = 1;
*out_creds = NULL;
client_realm = krb5_principal_get_realm(context, in_creds->client);
server_realm = krb5_principal_get_realm(context, in_creds->server);
memset(&tmp_creds, 0, sizeof(tmp_creds));
ret = krb5_copy_principal(context, in_creds->client, &tmp_creds.client);
if(ret)
return ret;
ret = krb5_make_principal(context,
&tmp_creds.server,
try_realm,
KRB5_TGS_NAME,
server_realm,
NULL);
if(ret){
krb5_free_principal(context, tmp_creds.client);
return ret;
}
{
krb5_creds tgts;
ret = find_cred(context, ccache, tmp_creds.server,
*ret_tgts, &tgts);
if(ret == 0){
if (strcmp(try_realm, client_realm) != 0 || strcmp(try_realm, server_realm) != 0)
ok_as_delegate = tgts.flags.b.ok_as_delegate;
*out_creds = calloc(1, sizeof(**out_creds));
if(*out_creds == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret,
N_("malloc: out of memory", ""));
} else {
ret = get_cred_kdc_address(context, ccache, flags, NULL,
in_creds, &tgts,
impersonate_principal,
second_ticket,
kdc_hostname,
*out_creds);
if (ret) {
free (*out_creds);
*out_creds = NULL;
} else if (krb5_principal_compare_any_realm(context, (*out_creds)->server, in_creds->server) != TRUE) {
krb5_free_creds(context, *out_creds);
*out_creds = NULL;
ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
} else if (ok_as_delegate == 0)
(*out_creds)->flags.b.ok_as_delegate = 0;
}
krb5_free_cred_contents(context, &tgts);
krb5_free_principal(context, tmp_creds.server);
krb5_free_principal(context, tmp_creds.client);
return ret;
}
}
if(krb5_realm_compare(context, in_creds->client, in_creds->server))
return not_found(context, in_creds->server, KRB5_CC_NOTFOUND);
while(1){
heim_general_string tgt_inst;
ret = get_cred_kdc_capath(context, flags, ccache, &tmp_creds,
NULL, NULL, kdc_hostname, &tgt, ret_tgts);
if(ret) {
krb5_free_principal(context, tmp_creds.server);
krb5_free_principal(context, tmp_creds.client);
return ret;
}
if (ok_as_delegate == 0 || tgt->flags.b.ok_as_delegate == 0) {
ok_as_delegate = 0;
tgt->flags.b.ok_as_delegate = 0;
}
ret = add_cred(context, tgt, ret_tgts);
if(ret) {
krb5_free_principal(context, tmp_creds.server);
krb5_free_principal(context, tmp_creds.client);
return ret;
}
tgt_inst = tgt->server->name.name_string.val[1];
if(strcmp(tgt_inst, server_realm) == 0)
break;
krb5_free_principal(context, tmp_creds.server);
ret = krb5_make_principal(context, &tmp_creds.server,
tgt_inst, KRB5_TGS_NAME, server_realm, NULL);
if(ret) {
krb5_free_principal(context, tmp_creds.server);
krb5_free_principal(context, tmp_creds.client);
return ret;
}
ret = krb5_free_creds(context, tgt);
if(ret) {
krb5_free_principal(context, tmp_creds.server);
krb5_free_principal(context, tmp_creds.client);
return ret;
}
}
krb5_free_principal(context, tmp_creds.server);
krb5_free_principal(context, tmp_creds.client);
*out_creds = calloc(1, sizeof(**out_creds));
if(*out_creds == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
} else {
ret = get_cred_kdc_address (context, ccache, flags, NULL,
in_creds, tgt, impersonate_principal,
second_ticket, kdc_hostname, *out_creds);
if (ret) {
free (*out_creds);
*out_creds = NULL;
} else if (krb5_principal_compare_any_realm(context, (*out_creds)->server, in_creds->server) != TRUE) {
krb5_free_creds(context, *out_creds);
*out_creds = NULL;
ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
}
}
krb5_free_creds(context, tgt);
return ret;
}
static krb5_error_code
get_cred_kdc_capath(krb5_context context,
krb5_kdc_flags flags,
krb5_ccache ccache,
krb5_creds *in_creds,
krb5_principal impersonate_principal,
Ticket *second_ticket,
const char *kdc_hostname,
krb5_creds **out_creds,
krb5_creds ***ret_tgts)
{
krb5_error_code ret;
krb5_const_realm client_realm, server_realm, try_realm;
client_realm = krb5_principal_get_realm(context, in_creds->client);
server_realm = krb5_principal_get_realm(context, in_creds->server);
try_realm = client_realm;
ret = get_cred_kdc_capath_worker(context, flags, ccache, in_creds, try_realm,
impersonate_principal, second_ticket, kdc_hostname,
out_creds, ret_tgts);
if (ret == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN) {
try_realm = krb5_config_get_string(context, NULL, "capaths",
client_realm, server_realm, NULL);
if (try_realm != NULL && strcmp(try_realm, client_realm)) {
ret = get_cred_kdc_capath_worker(context, flags, ccache, in_creds,
try_realm, impersonate_principal,
second_ticket, kdc_hostname,
out_creds, ret_tgts);
}
}
return ret;
}
static krb5_error_code
get_cred_kdc_referral(krb5_context context,
krb5_kdc_flags flags,
krb5_ccache ccache,
krb5_creds *in_creds,
krb5_principal impersonate_principal,
Ticket *second_ticket,
const char *kdc_hostname,
krb5_creds **out_creds,
krb5_creds ***ret_tgts)
{
krb5_const_realm client_realm;
krb5_const_principal server = in_creds->server;
krb5_error_code ret;
krb5_creds tgt, referral, ticket;
int loop = 0;
int ok_as_delegate = 1;
if (server->name.name_string.len < 2 && !flags.b.canonicalize) {
krb5_set_error_message(context, KRB5KDC_ERR_PATH_NOT_ACCEPTED,
N_("Name too short to do referals, skipping referals", ""));
return KRB5KDC_ERR_PATH_NOT_ACCEPTED;
}
if (server->name.name_string.len > 0 && strcmp(server->name.name_string.val[0], "kadmin") == 0) {
krb5_set_error_message(context, KRB5KDC_ERR_PATH_NOT_ACCEPTED,
N_("Name[0] is kadmin, skipping referrals", ""));
return KRB5KDC_ERR_PATH_NOT_ACCEPTED;
}
memset(&tgt, 0, sizeof(tgt));
memset(&ticket, 0, sizeof(ticket));
flags.b.canonicalize = 1;
*out_creds = NULL;
client_realm = krb5_principal_get_realm(context, in_creds->client);
{
krb5_principal tgtname;
ret = krb5_make_principal(context, &tgtname,
client_realm,
KRB5_TGS_NAME,
client_realm,
NULL);
if(ret)
return ret;
ret = find_cred(context, ccache, tgtname, *ret_tgts, &tgt);
krb5_free_principal(context, tgtname);
if (ret)
return ret;
}
referral = *in_creds;
ret = krb5_copy_principal(context, server, &referral.server);
if (ret) {
krb5_free_cred_contents(context, &tgt);
return ret;
}
ret = krb5_principal_set_realm(context, referral.server, client_realm);
if (ret) {
krb5_free_cred_contents(context, &tgt);
krb5_free_principal(context, referral.server);
return ret;
}
while (loop++ < 17) {
krb5_creds **tickets;
krb5_creds mcreds;
char *referral_realm;
if (impersonate_principal == NULL || flags.b.constrained_delegation) {
krb5_cc_clear_mcred(&mcreds);
mcreds.server = referral.server;
ret = krb5_cc_retrieve_cred(context, ccache, 0, &mcreds, &ticket);
} else
ret = EINVAL;
if (ret) {
ret = get_cred_kdc_address(context, ccache, flags, NULL,
&referral, &tgt, impersonate_principal,
second_ticket, kdc_hostname, &ticket);
if (ret)
goto out;
}
if (krb5_principal_compare_any_realm(context,
referral.server,
ticket.server))
break;
if (!krb5_principal_is_krbtgt(context, ticket.server)) {
krb5_set_error_message(context, KRB5KRB_AP_ERR_NOT_US,
N_("Got back an non krbtgt "
"ticket referrals", ""));
ret = KRB5KRB_AP_ERR_NOT_US;
goto out;
}
referral_realm = ticket.server->name.name_string.val[1];
tickets = *ret_tgts;
krb5_cc_clear_mcred(&mcreds);
mcreds.server = ticket.server;
while(tickets && *tickets){
if(krb5_compare_creds(context,
KRB5_TC_DONT_MATCH_REALM,
&mcreds,
*tickets))
{
krb5_set_error_message(context, KRB5_GET_IN_TKT_LOOP,
N_("Referral from %s "
"loops back to realm %s", ""),
tgt.server->realm,
referral_realm);
ret = KRB5_GET_IN_TKT_LOOP;
goto out;
}
tickets++;
}
if (ok_as_delegate == 0 || ticket.flags.b.ok_as_delegate == 0) {
ok_as_delegate = 0;
ticket.flags.b.ok_as_delegate = 0;
}
ret = add_cred(context, &ticket, ret_tgts);
if (ret)
goto out;
ret = krb5_principal_set_realm(context,
referral.server,
referral_realm);
krb5_free_cred_contents(context, &tgt);
tgt = ticket;
memset(&ticket, 0, sizeof(ticket));
if (ret)
goto out;
}
ret = krb5_copy_creds(context, &ticket, out_creds);
out:
krb5_free_principal(context, referral.server);
krb5_free_cred_contents(context, &tgt);
krb5_free_cred_contents(context, &ticket);
return ret;
}
krb5_error_code
_krb5_get_cred_kdc_any(krb5_context context,
krb5_kdc_flags flags,
krb5_ccache ccache,
krb5_creds *in_creds,
krb5_principal impersonate_principal,
Ticket *second_ticket,
krb5_creds **out_creds,
krb5_creds ***ret_tgts)
{
char *kdc_hostname = NULL;
krb5_error_code ret;
krb5_deltat offset;
krb5_data data;
ret = krb5_cc_get_config(context, ccache, NULL, "lkdc-hostname", &data);
if (ret == 0) {
kdc_hostname = malloc(data.length + 1);
if (kdc_hostname == NULL) {
krb5_set_error_message(context, ENOMEM,
N_("malloc: out of memory", ""));
return ENOMEM;
}
memcpy(kdc_hostname, data.data, data.length);
kdc_hostname[data.length] = '\0';
}
ret = krb5_cc_get_kdc_offset(context, ccache, &offset);
if (ret == 0) {
context->kdc_sec_offset = (uint32_t)offset;
context->kdc_usec_offset = 0;
}
ret = get_cred_kdc_referral(context,
flags,
ccache,
in_creds,
impersonate_principal,
second_ticket,
kdc_hostname,
out_creds,
ret_tgts);
if (ret == 0 || flags.b.canonicalize)
return ret;
return get_cred_kdc_capath(context,
flags,
ccache,
in_creds,
impersonate_principal,
second_ticket,
kdc_hostname,
out_creds,
ret_tgts);
}
static void
store_tgts(krb5_context context, krb5_ccache ccache, krb5_creds **tgts)
{
size_t n;
for (n = 0; tgts && tgts[n]; n++) {
krb5_const_principal server = tgts[n]->server;
if (krb5_principal_is_krbtgt(context, server) && strcmp(server->name.name_string.val[1], server->realm) != 0)
krb5_cc_store_cred(context, ccache, tgts[n]);
}
for (n = 0; tgts && tgts[n]; n++)
krb5_free_creds(context, tgts[n]);
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_credentials_with_flags(krb5_context context,
krb5_flags options,
krb5_kdc_flags flags,
krb5_ccache ccache,
krb5_creds *in_creds,
krb5_creds **out_creds)
{
struct timeval start_time, stop_time;
krb5_error_code ret;
krb5_creds **tgts;
krb5_creds *res_creds;
gettimeofday(&start_time, NULL);
if (in_creds->session.keytype) {
ret = krb5_enctype_valid(context, in_creds->session.keytype);
if (ret)
return ret;
}
*out_creds = NULL;
res_creds = calloc(1, sizeof(*res_creds));
if (res_creds == NULL) {
krb5_set_error_message(context, ENOMEM,
N_("malloc: out of memory", ""));
return ENOMEM;
}
if (in_creds->session.keytype)
options |= KRB5_TC_MATCH_KEYTYPE;
ret = krb5_cc_retrieve_cred(context,
ccache,
options,
in_creds, res_creds);
if (ret == 0) {
krb5_timestamp timeret;
if(options & KRB5_GC_EXPIRED_OK) {
*out_creds = res_creds;
return 0;
}
krb5_timeofday(context, &timeret);
if(res_creds->times.endtime > timeret) {
*out_creds = res_creds;
return 0;
}
if(options & KRB5_GC_CACHED)
krb5_cc_remove_cred(context, ccache, 0, res_creds);
krb5_free_cred_contents(context, res_creds);
} else if(ret != KRB5_CC_NOTFOUND) {
free(res_creds);
return ret;
}
free(res_creds);
if(options & KRB5_GC_CACHED)
return not_found(context, in_creds->server, KRB5_CC_NOTFOUND);
if ((options & KRB5_TC_MATCH_KEYTYPE) == 0 && context->tgs_negative_timeout) {
krb5_data neg;
ret = krb5_cc_get_config(context, ccache, in_creds->server, "negative-cache", &neg);
if (ret == 0) {
uint32_t t32 = (uint32_t)time(NULL);
int32_t rv = KRB5_CC_NOTFOUND;
krb5_storage *sp;
char *estr = NULL;
sp = krb5_storage_from_data(&neg);
if (sp == NULL) {
krb5_data_free(&neg);
return ENOMEM;
}
ret = krb5_ret_uint32(sp, &t32);
if (ret == 0)
ret = krb5_ret_int32(sp, &rv);
if (ret == 0)
ret = krb5_ret_string(sp, &estr);
krb5_storage_free(sp);
krb5_data_free(&neg);
if (ret) {
free(estr);
return ret;
}
if (abs((uint32_t)time(NULL) - t32) < context->tgs_negative_timeout) {
char *str = NULL;
ret = rv;
krb5_unparse_name(context, in_creds->server, &str);
krb5_set_error_message(context, ret,
"%s while looking up '%s' (cached result, timeout in %ld sec)",
estr ? estr : "<no cached error string>",
str ? str : "unknown",
context->tgs_negative_timeout - abs((int)(t32 - time(NULL))));
free(estr);
free(str);
return ret;
}
free(estr);
}
}
if(options & KRB5_GC_USER_USER)
flags.b.enc_tkt_in_skey = 1;
if (flags.b.enc_tkt_in_skey)
options |= KRB5_GC_NO_STORE;
tgts = NULL;
ret = _krb5_get_cred_kdc_any(context, flags, ccache,
in_creds, NULL, NULL, out_creds, &tgts);
if (tgts) {
store_tgts(context, ccache, tgts);
free(tgts);
}
if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0) {
krb5_cc_store_cred(context, ccache, *out_creds);
if (krb5_principal_compare_any_realm(context, (*out_creds)->server, in_creds->server) == FALSE) {
krb5_creds ref = **out_creds;
krb5_principal_data refp = *in_creds->server;
refp.realm = "";
ref.server = &refp;
krb5_cc_store_cred(context, ccache, &ref);
}
}
if ((options & KRB5_TC_MATCH_KEYTYPE) == 0 &&
((ret == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN) ||
(ret == KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN)))
{
krb5_storage *sp = krb5_storage_emem();
krb5_data neg;
if (sp == NULL)
goto out;
(void)krb5_store_uint32(sp, (uint32_t)time(NULL));
(void)krb5_store_int32(sp, ret);
if (context->error_code == ret && context->error_string)
(void)krb5_store_string(sp, context->error_string);
if (krb5_storage_to_data(sp, &neg) == 0) {
(void)krb5_cc_set_config(context, ccache, in_creds->server, "negative-cache", &neg);
krb5_data_free(&neg);
}
krb5_storage_free(sp);
}
out:
gettimeofday(&stop_time, NULL);
timevalsub(&stop_time, &start_time);
_krb5_debugx(context, 1, "krb5_get_credentials_with_flags: %s wc: %ld.%06d",
in_creds->client->realm,
stop_time.tv_sec, stop_time.tv_usec);
return ret;
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_credentials(krb5_context context,
krb5_flags options,
krb5_ccache ccache,
krb5_creds *in_creds,
krb5_creds **out_creds)
{
krb5_kdc_flags flags;
flags.i = 0;
return krb5_get_credentials_with_flags(context, options, flags,
ccache, in_creds, out_creds);
}
struct krb5_get_creds_opt_data {
krb5_principal self;
krb5_flags options;
krb5_enctype enctype;
Ticket *ticket;
};
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_creds_opt_alloc(krb5_context context, krb5_get_creds_opt *opt)
{
*opt = calloc(1, sizeof(**opt));
if (*opt == NULL) {
krb5_set_error_message(context, ENOMEM,
N_("malloc: out of memory", ""));
return ENOMEM;
}
return 0;
}
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
krb5_get_creds_opt_free(krb5_context context, krb5_get_creds_opt opt)
{
if (opt->self)
krb5_free_principal(context, opt->self);
if (opt->ticket) {
free_Ticket(opt->ticket);
free(opt->ticket);
}
memset(opt, 0, sizeof(*opt));
free(opt);
}
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
krb5_get_creds_opt_set_options(krb5_context context,
krb5_get_creds_opt opt,
krb5_flags options)
{
opt->options = options;
}
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
krb5_get_creds_opt_add_options(krb5_context context,
krb5_get_creds_opt opt,
krb5_flags options)
{
opt->options |= options;
}
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
krb5_get_creds_opt_set_enctype(krb5_context context,
krb5_get_creds_opt opt,
krb5_enctype enctype)
{
opt->enctype = enctype;
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_creds_opt_set_impersonate(krb5_context context,
krb5_get_creds_opt opt,
krb5_const_principal self)
{
if (opt->self)
krb5_free_principal(context, opt->self);
return krb5_copy_principal(context, self, &opt->self);
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_creds_opt_set_ticket(krb5_context context,
krb5_get_creds_opt opt,
const Ticket *ticket)
{
if (opt->ticket) {
free_Ticket(opt->ticket);
free(opt->ticket);
opt->ticket = NULL;
}
if (ticket) {
krb5_error_code ret;
opt->ticket = malloc(sizeof(*ticket));
if (opt->ticket == NULL) {
krb5_set_error_message(context, ENOMEM,
N_("malloc: out of memory", ""));
return ENOMEM;
}
ret = copy_Ticket(ticket, opt->ticket);
if (ret) {
free(opt->ticket);
opt->ticket = NULL;
krb5_set_error_message(context, ret,
N_("malloc: out of memory", ""));
return ret;
}
}
return 0;
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_creds(krb5_context context,
krb5_get_creds_opt opt,
krb5_ccache ccache,
krb5_const_principal inprinc,
krb5_creds **out_creds)
{
krb5_kdc_flags flags;
krb5_flags options;
krb5_creds in_creds;
krb5_error_code ret;
krb5_creds **tgts;
krb5_creds *res_creds;
if (opt && opt->enctype) {
ret = krb5_enctype_valid(context, opt->enctype);
if (ret)
return ret;
}
memset(&in_creds, 0, sizeof(in_creds));
in_creds.server = rk_UNCONST(inprinc);
if (_krb5_have_debug(context, 5)) {
char *princ;
ret = krb5_unparse_name(context, inprinc, &princ);
if (ret == 0) {
_krb5_debugx(context, 5, "krb5_get_creds: %s: opt: %d", princ, opt ? opt->options : 0);
krb5_xfree(princ);
}
}
ret = krb5_cc_get_principal(context, ccache, &in_creds.client);
if (ret)
return ret;
if (opt)
options = opt->options;
else
options = 0;
flags.i = 0;
*out_creds = NULL;
res_creds = calloc(1, sizeof(*res_creds));
if (res_creds == NULL) {
krb5_free_principal(context, in_creds.client);
krb5_set_error_message(context, ENOMEM,
N_("malloc: out of memory", ""));
return ENOMEM;
}
if (opt && opt->enctype) {
in_creds.session.keytype = opt->enctype;
options |= KRB5_TC_MATCH_KEYTYPE;
}
ret = krb5_cc_retrieve_cred(context,
ccache,
options & KRB5_TC_MATCH_KEYTYPE,
&in_creds, res_creds);
if (ret == 0) {
krb5_timestamp timeret;
if(options & KRB5_GC_EXPIRED_OK) {
*out_creds = res_creds;
krb5_free_principal(context, in_creds.client);
goto out;
}
krb5_timeofday(context, &timeret);
if(res_creds->times.endtime > timeret) {
*out_creds = res_creds;
krb5_free_principal(context, in_creds.client);
goto out;
}
if(options & KRB5_GC_CACHED)
krb5_cc_remove_cred(context, ccache, 0, res_creds);
} else if(ret != KRB5_CC_NOTFOUND) {
free(res_creds);
krb5_free_principal(context, in_creds.client);
goto out;
}
free(res_creds);
if(options & KRB5_GC_CACHED) {
krb5_free_principal(context, in_creds.client);
ret = not_found(context, in_creds.server, KRB5_CC_NOTFOUND);
goto out;
}
if(options & KRB5_GC_USER_USER) {
flags.b.enc_tkt_in_skey = 1;
options |= KRB5_GC_NO_STORE;
}
if (options & KRB5_GC_FORWARDABLE)
flags.b.forwardable = 1;
if (options & KRB5_GC_NO_TRANSIT_CHECK)
flags.b.disable_transited_check = 1;
if (options & KRB5_GC_CONSTRAINED_DELEGATION) {
flags.b.request_anonymous = 1;
flags.b.constrained_delegation = 1;
}
if (options & KRB5_GC_CANONICALIZE)
flags.b.canonicalize = 1;
tgts = NULL;
ret = _krb5_get_cred_kdc_any(context, flags, ccache,
&in_creds, opt ? opt->self : NULL, opt->ticket,
out_creds, &tgts);
krb5_free_principal(context, in_creds.client);
if (tgts) {
store_tgts(context, ccache, tgts);
free(tgts);
}
if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
krb5_cc_store_cred(context, ccache, *out_creds);
out:
_krb5_debugx(context, 5, "krb5_get_creds: ret = %d", ret);
return ret;
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_renewed_creds(krb5_context context,
krb5_creds *creds,
krb5_const_principal client,
krb5_ccache ccache,
const char *in_tkt_service)
{
krb5_error_code ret;
krb5_kdc_flags flags;
krb5_creds in, *template, *out = NULL;
memset(&in, 0, sizeof(in));
memset(creds, 0, sizeof(*creds));
ret = krb5_copy_principal(context, client, &in.client);
if (ret)
return ret;
if (in_tkt_service) {
ret = krb5_parse_name(context, in_tkt_service, &in.server);
if (ret) {
krb5_free_principal(context, in.client);
return ret;
}
} else {
const char *realm = krb5_principal_get_realm(context, client);
ret = krb5_make_principal(context, &in.server, realm, KRB5_TGS_NAME,
realm, NULL);
if (ret) {
krb5_free_principal(context, in.client);
return ret;
}
}
flags.i = 0;
flags.b.renewable = flags.b.renew = 1;
ret = krb5_get_credentials(context, KRB5_GC_CACHED, ccache, &in, &template);
if (ret == 0) {
flags.b.forwardable = template->flags.b.forwardable;
flags.b.proxiable = template->flags.b.proxiable;
krb5_free_creds (context, template);
}
ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &in, &out);
krb5_free_principal(context, in.client);
krb5_free_principal(context, in.server);
if (ret)
return ret;
ret = krb5_copy_creds_contents(context, out, creds);
krb5_free_creds(context, out);
return ret;
}