krb5_error_code KRB5_CALLCONV
krb5_copy_creds(krb5_context context, const krb5_creds *incred, krb5_creds **outcred)
{
krb5_creds *tempcred;
krb5_error_code retval;
krb5_data *scratch;
if (!(tempcred = (krb5_creds *)malloc(sizeof(*tempcred))))
return ENOMEM;
*tempcred = *incred;
retval = krb5_copy_principal(context, incred->client, &tempcred->client);
if (retval)
goto cleanlast;
retval = krb5_copy_principal(context, incred->server, &tempcred->server);
if (retval)
goto cleanclient;
retval = krb5_copy_keyblock_contents(context, &incred->keyblock,
&tempcred->keyblock);
if (retval)
goto cleanserver;
retval = krb5_copy_addresses(context, incred->addresses, &tempcred->addresses);
if (retval)
goto cleanblock;
retval = krb5_copy_data(context, &incred->ticket, &scratch);
if (retval)
goto cleanaddrs;
tempcred->ticket = *scratch;
krb5_xfree(scratch);
retval = krb5_copy_data(context, &incred->second_ticket, &scratch);
if (retval)
goto cleanticket;
tempcred->second_ticket = *scratch;
krb5_xfree(scratch);
retval = krb5_copy_authdata(context, incred->authdata,&tempcred->authdata);
if (retval)
goto clearticket;
*outcred = tempcred;
return 0;
clearticket:
memset(tempcred->ticket.data,0,tempcred->ticket.length);
cleanticket:
free(tempcred->ticket.data);
cleanaddrs:
krb5_free_addresses(context, tempcred->addresses);
cleanblock:
krb5_xfree(tempcred->keyblock.contents);
cleanserver:
krb5_free_principal(context, tempcred->server);
cleanclient:
krb5_free_principal(context, tempcred->client);
cleanlast:
krb5_xfree(tempcred);
return retval;
}
/*
* Copy contents of input credentials structure to supplied
* destination, allocating storage for indirect fields as needed. On
* success, the output is a deep copy of the input. On error, the
* output structure is garbage and its contents should be ignored.
*/
krb5_error_code
k5_copy_creds_contents(krb5_context context, const krb5_creds *incred,
krb5_creds *tempcred)
{
krb5_error_code retval;
krb5_data *scratch;
*tempcred = *incred;
retval = krb5_copy_principal(context, incred->client, &tempcred->client);
if (retval)
goto cleanlast;
retval = krb5_copy_principal(context, incred->server, &tempcred->server);
if (retval)
goto cleanclient;
retval = krb5_copy_keyblock_contents(context, &incred->keyblock,
&tempcred->keyblock);
if (retval)
goto cleanserver;
retval = krb5_copy_addresses(context, incred->addresses, &tempcred->addresses);
if (retval)
goto cleanblock;
retval = krb5_copy_data(context, &incred->ticket, &scratch);
if (retval)
goto cleanaddrs;
tempcred->ticket = *scratch;
free(scratch);
retval = krb5_copy_data(context, &incred->second_ticket, &scratch);
if (retval)
goto clearticket;
tempcred->second_ticket = *scratch;
free(scratch);
retval = krb5_copy_authdata(context, incred->authdata,&tempcred->authdata);
if (retval)
goto clearsecondticket;
return 0;
clearsecondticket:
memset(tempcred->second_ticket.data,0,tempcred->second_ticket.length);
free(tempcred->second_ticket.data);
clearticket:
memset(tempcred->ticket.data,0,tempcred->ticket.length);
free(tempcred->ticket.data);
cleanaddrs:
krb5_free_addresses(context, tempcred->addresses);
cleanblock:
free(tempcred->keyblock.contents);
cleanserver:
krb5_free_principal(context, tempcred->server);
cleanclient:
krb5_free_principal(context, tempcred->client);
cleanlast:
/* Do not free tempcred - we did not allocate it - its contents are
garbage - but we should not free it */
return retval;
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_ignore_addresses(krb5_context context, krb5_addresses *addresses)
{
if(context->ignore_addresses == NULL) {
memset(addresses, 0, sizeof(*addresses));
return 0;
}
return krb5_copy_addresses(context, context->ignore_addresses, addresses);
}
static void
add_one_address (krb5_context context, const char *str, int first)
{
krb5_error_code ret;
krb5_addresses tmp;
ret = krb5_parse_address (context, str, &tmp);
if (ret)
krb5_err (context, 1, ret, "parse_address `%s'", str);
if (first)
krb5_copy_addresses(context, &tmp, &explicit_addresses);
else
krb5_append_addresses(context, &explicit_addresses, &tmp);
krb5_free_addresses (context, &tmp);
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_copy_creds_contents (krb5_context context,
const krb5_creds *incred,
krb5_creds *c)
{
krb5_error_code ret;
memset(c, 0, sizeof(*c));
ret = krb5_copy_principal (context, incred->client, &c->client);
if (ret)
goto fail;
ret = krb5_copy_principal (context, incred->server, &c->server);
if (ret)
goto fail;
ret = krb5_copy_keyblock_contents (context, &incred->session, &c->session);
if (ret)
goto fail;
c->times = incred->times;
ret = krb5_data_copy (&c->ticket,
incred->ticket.data,
incred->ticket.length);
if (ret)
goto fail;
ret = krb5_data_copy (&c->second_ticket,
incred->second_ticket.data,
incred->second_ticket.length);
if (ret)
goto fail;
ret = copy_AuthorizationData(&incred->authdata, &c->authdata);
if (ret)
goto fail;
ret = krb5_copy_addresses (context,
&incred->addresses,
&c->addresses);
if (ret)
goto fail;
c->flags = incred->flags;
return 0;
fail:
krb5_free_cred_contents (context, c);
return ret;
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_set_ignore_addresses(krb5_context context, const krb5_addresses *addresses)
{
if(context->ignore_addresses)
krb5_free_addresses(context, context->ignore_addresses);
if(addresses == NULL) {
if(context->ignore_addresses != NULL) {
free(context->ignore_addresses);
context->ignore_addresses = NULL;
}
return 0;
}
if(context->ignore_addresses == NULL) {
context->ignore_addresses = malloc(sizeof(*context->ignore_addresses));
if (context->ignore_addresses == NULL)
return krb5_enomem(context);
}
return krb5_copy_addresses(context, addresses, context->ignore_addresses);
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_set_ignore_addresses(krb5_context context, const krb5_addresses *addresses)
{
if (context->ignore_addresses)
krb5_free_addresses(context, context->ignore_addresses);
if (addresses == NULL) {
if (context->ignore_addresses != NULL) {
free(context->ignore_addresses);
context->ignore_addresses = NULL;
}
return 0;
}
if (context->ignore_addresses == NULL) {
context->ignore_addresses = malloc(sizeof(*context->ignore_addresses));
if (context->ignore_addresses == NULL) {
krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
}
return krb5_copy_addresses(context, addresses, context->ignore_addresses);
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_rd_cred(krb5_context context,
krb5_auth_context auth_context,
krb5_data *in_data,
krb5_creds ***ret_creds,
krb5_replay_data *outdata)
{
krb5_error_code ret;
size_t len;
KRB_CRED cred;
EncKrbCredPart enc_krb_cred_part;
krb5_data enc_krb_cred_part_data;
krb5_crypto crypto;
int i;
memset(&enc_krb_cred_part, 0, sizeof(enc_krb_cred_part));
if ((auth_context->flags &
(KRB5_AUTH_CONTEXT_RET_TIME | KRB5_AUTH_CONTEXT_RET_SEQUENCE)) &&
outdata == NULL)
return KRB5_RC_REQUIRED; /* XXX better error, MIT returns this */
*ret_creds = NULL;
ret = decode_KRB_CRED(in_data->data, in_data->length,
&cred, &len);
if(ret) {
krb5_clear_error_message(context);
return ret;
}
if (cred.pvno != 5) {
ret = KRB5KRB_AP_ERR_BADVERSION;
krb5_clear_error_message (context);
goto out;
}
if (cred.msg_type != krb_cred) {
ret = KRB5KRB_AP_ERR_MSG_TYPE;
krb5_clear_error_message (context);
goto out;
}
if (cred.enc_part.etype == ETYPE_NULL) {
/* DK: MIT GSS-API Compatibility */
enc_krb_cred_part_data.length = cred.enc_part.cipher.length;
enc_krb_cred_part_data.data = cred.enc_part.cipher.data;
} else {
/* Try both subkey and session key.
*
* RFC4120 claims we should use the session key, but Heimdal
* before 0.8 used the remote subkey if it was send in the
* auth_context.
*/
if (auth_context->remote_subkey) {
ret = krb5_crypto_init(context, auth_context->remote_subkey,
0, &crypto);
if (ret)
goto out;
ret = krb5_decrypt_EncryptedData(context,
crypto,
KRB5_KU_KRB_CRED,
&cred.enc_part,
&enc_krb_cred_part_data);
krb5_crypto_destroy(context, crypto);
}
/*
* If there was not subkey, or we failed using subkey,
* retry using the session key
*/
if (auth_context->remote_subkey == NULL || ret == KRB5KRB_AP_ERR_BAD_INTEGRITY)
{
ret = krb5_crypto_init(context, auth_context->keyblock,
0, &crypto);
if (ret)
goto out;
ret = krb5_decrypt_EncryptedData(context,
crypto,
KRB5_KU_KRB_CRED,
&cred.enc_part,
&enc_krb_cred_part_data);
krb5_crypto_destroy(context, crypto);
}
if (ret)
goto out;
}
ret = decode_EncKrbCredPart(enc_krb_cred_part_data.data,
enc_krb_cred_part_data.length,
&enc_krb_cred_part,
&len);
if (enc_krb_cred_part_data.data != cred.enc_part.cipher.data)
krb5_data_free(&enc_krb_cred_part_data);
if (ret) {
krb5_set_error_message(context, ret,
N_("Failed to decode "
"encrypte credential part", ""));
goto out;
}
/* check sender address */
if (enc_krb_cred_part.s_address
&& auth_context->remote_address
&& auth_context->remote_port) {
krb5_address *a;
ret = krb5_make_addrport (context, &a,
auth_context->remote_address,
auth_context->remote_port);
if (ret)
goto out;
ret = compare_addrs(context, a, enc_krb_cred_part.s_address,
N_("sender address is wrong "
"in received creds", ""));
krb5_free_address(context, a);
free(a);
if(ret)
goto out;
}
/* check receiver address */
if (enc_krb_cred_part.r_address
&& auth_context->local_address) {
if(auth_context->local_port &&
enc_krb_cred_part.r_address->addr_type == KRB5_ADDRESS_ADDRPORT) {
krb5_address *a;
ret = krb5_make_addrport (context, &a,
auth_context->local_address,
auth_context->local_port);
if (ret)
goto out;
ret = compare_addrs(context, a, enc_krb_cred_part.r_address,
N_("receiver address is wrong "
"in received creds", ""));
krb5_free_address(context, a);
free(a);
if(ret)
goto out;
} else {
ret = compare_addrs(context, auth_context->local_address,
enc_krb_cred_part.r_address,
N_("receiver address is wrong "
"in received creds", ""));
if(ret)
goto out;
}
}
/* check timestamp */
if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) {
krb5_timestamp sec;
krb5_timeofday (context, &sec);
if (enc_krb_cred_part.timestamp == NULL ||
enc_krb_cred_part.usec == NULL ||
abs(*enc_krb_cred_part.timestamp - sec)
> context->max_skew) {
krb5_clear_error_message (context);
ret = KRB5KRB_AP_ERR_SKEW;
goto out;
}
}
if ((auth_context->flags &
(KRB5_AUTH_CONTEXT_RET_TIME | KRB5_AUTH_CONTEXT_RET_SEQUENCE))) {
/* if these fields are not present in the cred-part, silently
return zero */
memset(outdata, 0, sizeof(*outdata));
if(enc_krb_cred_part.timestamp)
outdata->timestamp = *enc_krb_cred_part.timestamp;
if(enc_krb_cred_part.usec)
outdata->usec = *enc_krb_cred_part.usec;
if(enc_krb_cred_part.nonce)
outdata->seq = *enc_krb_cred_part.nonce;
}
/* Convert to NULL terminated list of creds */
*ret_creds = calloc(enc_krb_cred_part.ticket_info.len + 1,
sizeof(**ret_creds));
if (*ret_creds == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret,
N_("malloc: out of memory", ""));
goto out;
}
for (i = 0; i < enc_krb_cred_part.ticket_info.len; ++i) {
KrbCredInfo *kci = &enc_krb_cred_part.ticket_info.val[i];
krb5_creds *creds;
creds = calloc(1, sizeof(*creds));
if(creds == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret,
N_("malloc: out of memory", ""));
goto out;
}
ASN1_MALLOC_ENCODE(Ticket, creds->ticket.data, creds->ticket.length,
&cred.tickets.val[i], &len, ret);
if (ret) {
free(creds);
goto out;
}
if(creds->ticket.length != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
copy_EncryptionKey (&kci->key, &creds->session);
if (kci->prealm && kci->pname)
_krb5_principalname2krb5_principal (context,
&creds->client,
*kci->pname,
*kci->prealm);
if (kci->flags)
creds->flags.b = *kci->flags;
if (kci->authtime)
creds->times.authtime = *kci->authtime;
if (kci->starttime)
creds->times.starttime = *kci->starttime;
if (kci->endtime)
creds->times.endtime = *kci->endtime;
if (kci->renew_till)
creds->times.renew_till = *kci->renew_till;
if (kci->srealm && kci->sname)
_krb5_principalname2krb5_principal (context,
&creds->server,
*kci->sname,
*kci->srealm);
if (kci->caddr)
krb5_copy_addresses (context,
kci->caddr,
&creds->addresses);
(*ret_creds)[i] = creds;
}
(*ret_creds)[i] = NULL;
free_KRB_CRED (&cred);
free_EncKrbCredPart(&enc_krb_cred_part);
return 0;
out:
free_EncKrbCredPart(&enc_krb_cred_part);
free_KRB_CRED (&cred);
if(*ret_creds) {
for(i = 0; (*ret_creds)[i]; i++)
krb5_free_creds(context, (*ret_creds)[i]);
free(*ret_creds);
*ret_creds = NULL;
}
return ret;
}
static krb5_error_code
init_as_req (krb5_context context,
KDCOptions opts,
krb5_creds *creds,
const krb5_addresses *addrs,
const krb5_enctype *etypes,
const krb5_preauthtype *ptypes,
const krb5_preauthdata *preauth,
krb5_key_proc key_proc,
krb5_const_pointer keyseed,
unsigned nonce,
AS_REQ *a)
{
krb5_error_code ret;
krb5_salt salt;
memset(a, 0, sizeof(*a));
a->pvno = 5;
a->msg_type = krb_as_req;
a->req_body.kdc_options = opts;
a->req_body.cname = malloc(sizeof(*a->req_body.cname));
if (a->req_body.cname == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto fail;
}
a->req_body.sname = malloc(sizeof(*a->req_body.sname));
if (a->req_body.sname == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto fail;
}
ret = _krb5_principal2principalname (a->req_body.cname, creds->client);
if (ret)
goto fail;
ret = _krb5_principal2principalname (a->req_body.sname, creds->server);
if (ret)
goto fail;
ret = copy_Realm(&creds->client->realm, &a->req_body.realm);
if (ret)
goto fail;
if(creds->times.starttime) {
a->req_body.from = malloc(sizeof(*a->req_body.from));
if (a->req_body.from == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto fail;
}
*a->req_body.from = creds->times.starttime;
}
if(creds->times.endtime){
ALLOC(a->req_body.till, 1);
*a->req_body.till = creds->times.endtime;
}
if(creds->times.renew_till){
a->req_body.rtime = malloc(sizeof(*a->req_body.rtime));
if (a->req_body.rtime == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto fail;
}
*a->req_body.rtime = creds->times.renew_till;
}
a->req_body.nonce = nonce;
ret = _krb5_init_etype(context,
KRB5_PDU_AS_REQUEST,
&a->req_body.etype.len,
&a->req_body.etype.val,
etypes);
if (ret)
goto fail;
/*
* This means no addresses
*/
if (addrs && addrs->len == 0) {
a->req_body.addresses = NULL;
} else {
a->req_body.addresses = malloc(sizeof(*a->req_body.addresses));
if (a->req_body.addresses == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto fail;
}
if (addrs)
ret = krb5_copy_addresses(context, addrs, a->req_body.addresses);
else {
ret = krb5_get_all_client_addrs (context, a->req_body.addresses);
if(ret == 0 && a->req_body.addresses->len == 0) {
free(a->req_body.addresses);
a->req_body.addresses = NULL;
}
}
if (ret)
return ret;
}
a->req_body.enc_authorization_data = NULL;
a->req_body.additional_tickets = NULL;
if(preauth != NULL) {
size_t i;
ALLOC(a->padata, 1);
if(a->padata == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto fail;
}
a->padata->val = NULL;
a->padata->len = 0;
for(i = 0; i < preauth->len; i++) {
if(preauth->val[i].type == KRB5_PADATA_ENC_TIMESTAMP){
size_t j;
for(j = 0; j < preauth->val[i].info.len; j++) {
krb5_salt *sp = &salt;
if(preauth->val[i].info.val[j].salttype)
salt.salttype = *preauth->val[i].info.val[j].salttype;
else
salt.salttype = KRB5_PW_SALT;
if(preauth->val[i].info.val[j].salt)
salt.saltvalue = *preauth->val[i].info.val[j].salt;
else
if(salt.salttype == KRB5_PW_SALT)
sp = NULL;
else
krb5_data_zero(&salt.saltvalue);
ret = add_padata(context, a->padata, creds->client,
key_proc, keyseed,
&preauth->val[i].info.val[j].etype, 1,
sp);
if (ret == 0)
break;
}
}
}
} else
/* not sure this is the way to use `ptypes' */
if (ptypes == NULL || *ptypes == KRB5_PADATA_NONE)
a->padata = NULL;
else if (*ptypes == KRB5_PADATA_ENC_TIMESTAMP) {
ALLOC(a->padata, 1);
if (a->padata == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto fail;
}
a->padata->len = 0;
a->padata->val = NULL;
/* make a v5 salted pa-data */
add_padata(context, a->padata, creds->client,
key_proc, keyseed, a->req_body.etype.val,
a->req_body.etype.len, NULL);
/* make a v4 salted pa-data */
salt.salttype = KRB5_PW_SALT;
krb5_data_zero(&salt.saltvalue);
add_padata(context, a->padata, creds->client,
key_proc, keyseed, a->req_body.etype.val,
a->req_body.etype.len, &salt);
} else {
ret = KRB5_PREAUTH_BAD_TYPE;
krb5_set_error_message (context, ret,
N_("pre-auth type %d not supported", ""),
*ptypes);
goto fail;
}
return 0;
fail:
free_AS_REQ(a);
return ret;
}
int
_krb5_extract_ticket(krb5_context context,
krb5_kdc_rep *rep,
krb5_creds *creds,
krb5_keyblock *key,
krb5_const_pointer keyseed,
krb5_key_usage key_usage,
krb5_addresses *addrs,
unsigned nonce,
unsigned flags,
krb5_decrypt_proc decrypt_proc,
krb5_const_pointer decryptarg)
{
krb5_error_code ret;
krb5_principal tmp_principal;
size_t len = 0;
time_t tmp_time;
krb5_timestamp sec_now;
/* decrypt */
if (decrypt_proc == NULL)
decrypt_proc = decrypt_tkt;
ret = (*decrypt_proc)(context, key, key_usage, decryptarg, rep);
if (ret)
goto out;
/* save session key */
creds->session.keyvalue.length = 0;
creds->session.keyvalue.data = NULL;
creds->session.keytype = rep->enc_part.key.keytype;
ret = krb5_data_copy (&creds->session.keyvalue,
rep->enc_part.key.keyvalue.data,
rep->enc_part.key.keyvalue.length);
if (ret) {
krb5_clear_error_message(context);
goto out;
}
/* compare client and save */
ret = _krb5_principalname2krb5_principal (context,
&tmp_principal,
rep->kdc_rep.cname,
rep->kdc_rep.crealm);
if (ret)
goto out;
/* check client referral and save principal */
/* anonymous here ? */
if((flags & EXTRACT_TICKET_ALLOW_CNAME_MISMATCH) == 0) {
ret = check_client_referral(context, rep,
creds->client,
tmp_principal,
&creds->session);
if (ret) {
krb5_free_principal (context, tmp_principal);
goto out;
}
}
krb5_free_principal (context, creds->client);
creds->client = tmp_principal;
/* check server referral and save principal */
ret = _krb5_principalname2krb5_principal (context,
&tmp_principal,
rep->kdc_rep.ticket.sname,
rep->kdc_rep.ticket.realm);
if (ret)
goto out;
if((flags & EXTRACT_TICKET_ALLOW_SERVER_MISMATCH) == 0){
ret = check_server_referral(context,
rep,
flags,
creds->server,
tmp_principal,
&creds->session);
if (ret) {
krb5_free_principal (context, tmp_principal);
goto out;
}
}
krb5_free_principal(context, creds->server);
creds->server = tmp_principal;
/* verify names */
if(flags & EXTRACT_TICKET_MATCH_REALM){
const char *srealm = krb5_principal_get_realm(context, creds->server);
const char *crealm = krb5_principal_get_realm(context, creds->client);
if (strcmp(rep->enc_part.srealm, srealm) != 0 ||
strcmp(rep->enc_part.srealm, crealm) != 0)
{
ret = KRB5KRB_AP_ERR_MODIFIED;
krb5_clear_error_message(context);
goto out;
}
}
/* compare nonces */
if (nonce != (unsigned)rep->enc_part.nonce) {
ret = KRB5KRB_AP_ERR_MODIFIED;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto out;
}
/* set kdc-offset */
krb5_timeofday (context, &sec_now);
if (rep->enc_part.flags.initial
&& (flags & EXTRACT_TICKET_TIMESYNC)
&& context->kdc_sec_offset == 0
&& krb5_config_get_bool (context, NULL,
"libdefaults",
"kdc_timesync",
NULL)) {
context->kdc_sec_offset = rep->enc_part.authtime - sec_now;
krb5_timeofday (context, &sec_now);
}
/* check all times */
if (rep->enc_part.starttime) {
tmp_time = *rep->enc_part.starttime;
} else
tmp_time = rep->enc_part.authtime;
if (creds->times.starttime == 0
&& abs(tmp_time - sec_now) > context->max_skew) {
ret = KRB5KRB_AP_ERR_SKEW;
krb5_set_error_message (context, ret,
N_("time skew (%d) larger than max (%d)", ""),
abs(tmp_time - sec_now),
(int)context->max_skew);
goto out;
}
if (creds->times.starttime != 0
&& tmp_time != creds->times.starttime) {
krb5_clear_error_message (context);
ret = KRB5KRB_AP_ERR_MODIFIED;
goto out;
}
creds->times.starttime = tmp_time;
if (rep->enc_part.renew_till) {
tmp_time = *rep->enc_part.renew_till;
} else
tmp_time = 0;
if (creds->times.renew_till != 0
&& tmp_time > creds->times.renew_till) {
krb5_clear_error_message (context);
ret = KRB5KRB_AP_ERR_MODIFIED;
goto out;
}
creds->times.renew_till = tmp_time;
creds->times.authtime = rep->enc_part.authtime;
if (creds->times.endtime != 0
&& rep->enc_part.endtime > creds->times.endtime) {
krb5_clear_error_message (context);
ret = KRB5KRB_AP_ERR_MODIFIED;
goto out;
}
creds->times.endtime = rep->enc_part.endtime;
if(rep->enc_part.caddr)
krb5_copy_addresses (context, rep->enc_part.caddr, &creds->addresses);
else if(addrs)
krb5_copy_addresses (context, addrs, &creds->addresses);
else {
creds->addresses.len = 0;
creds->addresses.val = NULL;
}
creds->flags.b = rep->enc_part.flags;
creds->authdata.len = 0;
creds->authdata.val = NULL;
/* extract ticket */
ASN1_MALLOC_ENCODE(Ticket, creds->ticket.data, creds->ticket.length,
&rep->kdc_rep.ticket, &len, ret);
if(ret)
goto out;
if (creds->ticket.length != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
creds->second_ticket.length = 0;
creds->second_ticket.data = NULL;
out:
memset (rep->enc_part.key.keyvalue.data, 0,
rep->enc_part.key.keyvalue.length);
return ret;
}
static krb5_error_code
kdcrep2creds(krb5_context context, krb5_kdc_rep *pkdcrep, krb5_address *const *address,
krb5_data *psectkt, krb5_creds **ppcreds)
{
krb5_error_code retval;
krb5_data *pdata;
if ((*ppcreds = (krb5_creds *)calloc(1,sizeof(krb5_creds))) == NULL) {
return ENOMEM;
}
if ((retval = krb5_copy_principal(context, pkdcrep->client,
&(*ppcreds)->client)))
goto cleanup;
if ((retval = krb5_copy_principal(context, pkdcrep->enc_part2->server,
&(*ppcreds)->server)))
goto cleanup;
if ((retval = krb5_copy_keyblock_contents(context,
pkdcrep->enc_part2->session,
&(*ppcreds)->keyblock)))
goto cleanup;
TRACE_TGS_REPLY(context, (*ppcreds)->client, (*ppcreds)->server,
&(*ppcreds)->keyblock);
if ((retval = krb5_copy_data(context, psectkt, &pdata)))
goto cleanup_keyblock;
(*ppcreds)->second_ticket = *pdata;
free(pdata);
(*ppcreds)->ticket_flags = pkdcrep->enc_part2->flags;
(*ppcreds)->times = pkdcrep->enc_part2->times;
(*ppcreds)->magic = KV5M_CREDS;
(*ppcreds)->authdata = NULL; /* not used */
(*ppcreds)->is_skey = psectkt->length != 0;
if (pkdcrep->enc_part2->caddrs) {
if ((retval = krb5_copy_addresses(context, pkdcrep->enc_part2->caddrs,
&(*ppcreds)->addresses)))
goto cleanup_keyblock;
} else {
/* no addresses in the list means we got what we had */
if ((retval = krb5_copy_addresses(context, address,
&(*ppcreds)->addresses)))
goto cleanup_keyblock;
}
if ((retval = encode_krb5_ticket(pkdcrep->ticket, &pdata)))
goto cleanup_keyblock;
(*ppcreds)->ticket = *pdata;
free(pdata);
return 0;
cleanup_keyblock:
krb5_free_keyblock_contents(context, &(*ppcreds)->keyblock);
cleanup:
free (*ppcreds);
*ppcreds = NULL;
return retval;
}
static krb5_error_code
krb5_mk_ncred_basic(krb5_context context,
krb5_creds **ppcreds, krb5_int32 nppcreds,
krb5_key key, krb5_replay_data *replaydata,
krb5_address *local_addr, krb5_address *remote_addr,
krb5_cred *pcred)
{
krb5_cred_enc_part credenc;
krb5_error_code retval;
size_t size;
int i;
credenc.magic = KV5M_CRED_ENC_PART;
credenc.s_address = 0;
credenc.r_address = 0;
if (local_addr) krb5_copy_addr(context, local_addr, &credenc.s_address);
if (remote_addr) krb5_copy_addr(context, remote_addr, &credenc.r_address);
credenc.nonce = replaydata->seq;
credenc.usec = replaydata->usec;
credenc.timestamp = replaydata->timestamp;
/* Get memory for creds and initialize it */
size = sizeof(krb5_cred_info *) * (nppcreds + 1);
credenc.ticket_info = (krb5_cred_info **) calloc(1, size);
if (credenc.ticket_info == NULL)
return ENOMEM;
/*
* For each credential in the list, initialize a cred info
* structure and copy the ticket into the ticket list.
*/
for (i = 0; i < nppcreds; i++) {
credenc.ticket_info[i] = calloc(1, sizeof(krb5_cred_info));
if (credenc.ticket_info[i] == NULL) {
retval = ENOMEM;
goto cleanup;
}
credenc.ticket_info[i+1] = NULL;
credenc.ticket_info[i]->magic = KV5M_CRED_INFO;
credenc.ticket_info[i]->times = ppcreds[i]->times;
credenc.ticket_info[i]->flags = ppcreds[i]->ticket_flags;
if ((retval = decode_krb5_ticket(&ppcreds[i]->ticket,
&pcred->tickets[i])))
goto cleanup;
if ((retval = krb5_copy_keyblock(context, &ppcreds[i]->keyblock,
&credenc.ticket_info[i]->session)))
goto cleanup;
if ((retval = krb5_copy_principal(context, ppcreds[i]->client,
&credenc.ticket_info[i]->client)))
goto cleanup;
if ((retval = krb5_copy_principal(context, ppcreds[i]->server,
&credenc.ticket_info[i]->server)))
goto cleanup;
if ((retval = krb5_copy_addresses(context, ppcreds[i]->addresses,
&credenc.ticket_info[i]->caddrs)))
goto cleanup;
}
/*
* NULL terminate the lists.
*/
pcred->tickets[i] = NULL;
/* encrypt the credential encrypted part */
retval = encrypt_credencpart(context, &credenc, key, &pcred->enc_part);
cleanup:
krb5_free_cred_enc_part(context, &credenc);
return retval;
}
static krb5_error_code
init_as_req (krb5_context context,
KDCOptions opts,
const krb5_creds *creds,
const krb5_addresses *addrs,
const krb5_enctype *etypes,
AS_REQ *a)
{
krb5_error_code ret;
memset(a, 0, sizeof(*a));
a->pvno = 5;
a->msg_type = krb_as_req;
a->req_body.kdc_options = opts;
a->req_body.cname = malloc(sizeof(*a->req_body.cname));
if (a->req_body.cname == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto fail;
}
a->req_body.sname = malloc(sizeof(*a->req_body.sname));
if (a->req_body.sname == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto fail;
}
ret = _krb5_principal2principalname (a->req_body.cname, creds->client);
if (ret)
goto fail;
ret = copy_Realm(&creds->client->realm, &a->req_body.realm);
if (ret)
goto fail;
ret = _krb5_principal2principalname (a->req_body.sname, creds->server);
if (ret)
goto fail;
if(creds->times.starttime) {
a->req_body.from = malloc(sizeof(*a->req_body.from));
if (a->req_body.from == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto fail;
}
*a->req_body.from = creds->times.starttime;
}
if(creds->times.endtime){
ALLOC(a->req_body.till, 1);
*a->req_body.till = creds->times.endtime;
}
if(creds->times.renew_till){
a->req_body.rtime = malloc(sizeof(*a->req_body.rtime));
if (a->req_body.rtime == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto fail;
}
*a->req_body.rtime = creds->times.renew_till;
}
a->req_body.nonce = 0;
ret = krb5_init_etype (context,
&a->req_body.etype.len,
&a->req_body.etype.val,
etypes);
if (ret)
goto fail;
/*
* This means no addresses
*/
if (addrs && addrs->len == 0) {
a->req_body.addresses = NULL;
} else {
a->req_body.addresses = malloc(sizeof(*a->req_body.addresses));
if (a->req_body.addresses == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto fail;
}
if (addrs)
ret = krb5_copy_addresses(context, addrs, a->req_body.addresses);
else {
ret = krb5_get_all_client_addrs (context, a->req_body.addresses);
if(ret == 0 && a->req_body.addresses->len == 0) {
free(a->req_body.addresses);
a->req_body.addresses = NULL;
}
}
if (ret)
goto fail;
}
a->req_body.enc_authorization_data = NULL;
a->req_body.additional_tickets = NULL;
a->padata = NULL;
return 0;
fail:
free_AS_REQ(a);
memset(a, 0, sizeof(*a));
return ret;
}
static krb5_error_code
krb5_rd_cred_basic(krb5_context context, krb5_data *pcreddata,
krb5_key pkey, krb5_replay_data *replaydata,
krb5_creds ***pppcreds)
{
krb5_error_code retval = 0;
krb5_cred * pcred = NULL;
krb5_int32 ncreds = 0;
krb5_int32 i = 0;
krb5_cred_enc_part encpart;
/* decode cred message */
if ((retval = decode_krb5_cred(pcreddata, &pcred)))
return retval;
memset(&encpart, 0, sizeof(encpart));
if ((retval = decrypt_credencdata(context, pcred, pkey, &encpart)))
goto cleanup_cred;
replaydata->timestamp = encpart.timestamp;
replaydata->usec = encpart.usec;
replaydata->seq = encpart.nonce;
/*
* Allocate the list of creds. The memory is allocated so that
* krb5_free_tgt_creds can be used to free the list.
*/
for (ncreds = 0; pcred->tickets[ncreds]; ncreds++);
if ((*pppcreds =
(krb5_creds **)malloc((size_t)(sizeof(krb5_creds *) *
(ncreds + 1)))) == NULL) {
retval = ENOMEM;
goto cleanup_cred;
}
(*pppcreds)[0] = NULL;
/*
* For each credential, create a strcture in the list of
* credentials and copy the information.
*/
while (i < ncreds) {
krb5_cred_info * pinfo;
krb5_creds * pcur;
krb5_data * pdata;
if ((pcur = (krb5_creds *)calloc(1, sizeof(krb5_creds))) == NULL) {
retval = ENOMEM;
goto cleanup;
}
(*pppcreds)[i] = pcur;
(*pppcreds)[i+1] = 0;
pinfo = encpart.ticket_info[i++];
if ((retval = krb5_copy_principal(context, pinfo->client,
&pcur->client)))
goto cleanup;
if ((retval = krb5_copy_principal(context, pinfo->server,
&pcur->server)))
goto cleanup;
if ((retval = krb5_copy_keyblock_contents(context, pinfo->session,
&pcur->keyblock)))
goto cleanup;
if ((retval = krb5_copy_addresses(context, pinfo->caddrs,
&pcur->addresses)))
goto cleanup;
if ((retval = encode_krb5_ticket(pcred->tickets[i - 1], &pdata)))
goto cleanup;
pcur->ticket = *pdata;
free(pdata);
pcur->is_skey = FALSE;
pcur->magic = KV5M_CREDS;
pcur->times = pinfo->times;
pcur->ticket_flags = pinfo->flags;
pcur->authdata = NULL; /* not used */
memset(&pcur->second_ticket, 0, sizeof(pcur->second_ticket));
}
/*
* NULL terminate the list
*/
(*pppcreds)[i] = NULL;
cleanup:
if (retval) {
krb5_free_tgt_creds(context, *pppcreds);
*pppcreds = NULL;
}
cleanup_cred:
krb5_free_cred(context, pcred);
krb5_free_cred_enc_part(context, &encpart);
return retval;
}
/* Produce a list of credentials from a KRB-CRED message and its enc_part. */
static krb5_error_code
make_cred_list(krb5_context context, krb5_cred *krbcred,
krb5_cred_enc_part *encpart, krb5_creds ***creds_out)
{
krb5_error_code ret = 0;
krb5_creds **list = NULL;
krb5_cred_info *info;
krb5_data *ticket_data;
size_t i, count;
*creds_out = NULL;
/* Allocate the list of creds. */
for (count = 0; krbcred->tickets[count] != NULL; count++);
list = k5calloc(count + 1, sizeof(*list), &ret);
if (list == NULL)
goto cleanup;
/* For each credential, create a strcture in the list of credentials and
* copy the information. */
for (i = 0; i < count; i++) {
list[i] = k5alloc(sizeof(*list[i]), &ret);
if (list[i] == NULL)
goto cleanup;
info = encpart->ticket_info[i];
ret = krb5_copy_principal(context, info->client, &list[i]->client);
if (ret)
goto cleanup;
ret = krb5_copy_principal(context, info->server, &list[i]->server);
if (ret)
goto cleanup;
ret = krb5_copy_keyblock_contents(context, info->session,
&list[i]->keyblock);
if (ret)
goto cleanup;
ret = krb5_copy_addresses(context, info->caddrs, &list[i]->addresses);
if (ret)
goto cleanup;
ret = encode_krb5_ticket(krbcred->tickets[i], &ticket_data);
if (ret)
goto cleanup;
list[i]->ticket = *ticket_data;
free(ticket_data);
list[i]->is_skey = FALSE;
list[i]->magic = KV5M_CREDS;
list[i]->times = info->times;
list[i]->ticket_flags = info->flags;
list[i]->authdata = NULL;
list[i]->second_ticket = empty_data();
}
*creds_out = list;
list = NULL;
cleanup:
krb5_free_tgt_creds(context, list);
return ret;
}