KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_ticket_get_authorization_data_type(krb5_context context,
krb5_ticket *ticket,
int type,
krb5_data *data)
{
AuthorizationData *ad;
krb5_error_code ret;
krb5_boolean found = FALSE;
krb5_data_zero(data);
ad = ticket->ticket.authorization_data;
if (ticket->ticket.authorization_data == NULL) {
krb5_set_error_message(context, ENOENT,
N_("Ticket have not authorization data", ""));
return ENOENT; /* XXX */
}
ret = find_type_in_ad(context, type, data, &found, TRUE,
&ticket->ticket.key, ad, 0);
if (ret)
return ret;
if (!found) {
krb5_set_error_message(context, ENOENT,
N_("Ticket have not "
"authorization data of type %d", ""),
type);
return ENOENT; /* XXX */
}
return 0;
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
_krb5_get_ad(krb5_context context,
const AuthorizationData *ad,
krb5_keyblock *sessionkey,
int type,
krb5_data *data)
{
krb5_boolean found = FALSE;
krb5_error_code ret;
krb5_data_zero(data);
if (ad == NULL) {
krb5_set_error_message(context, ENOENT,
N_("No authorization data", ""));
return ENOENT; /* XXX */
}
ret = find_type_in_ad(context, type, data, &found, TRUE, sessionkey, ad, 0);
if (ret)
return ret;
if (!found) {
krb5_set_error_message(context, ENOENT,
N_("Have no authorization data of type %d", ""),
type);
return ENOENT; /* XXX */
}
return 0;
}
int
_krb5_find_type_in_ad(krb5_context context,
int type,
krb5_data *data,
krb5_boolean *found,
krb5_keyblock *sessionkey,
const AuthorizationData *ad)
{
krb5_data_zero(data);
return find_type_in_ad(context, type, data, found, TRUE, sessionkey, ad, 0);
}
static int
find_type_in_ad(krb5_context context,
int type,
krb5_data *data,
krb5_boolean *found,
krb5_boolean failp,
krb5_keyblock *sessionkey,
const AuthorizationData *ad,
int level)
{
krb5_error_code ret = 0;
size_t i;
if (level > 9) {
ret = ENOENT; /* XXX */
krb5_set_error_message(context, ret,
N_("Authorization data nested deeper "
"then %d levels, stop searching", ""),
level);
goto out;
}
/*
* Only copy out the element the first time we get to it, we need
* to run over the whole authorization data fields to check if
* there are any container clases we need to care about.
*/
for (i = 0; i < ad->len; i++) {
if (!*found && ad->val[i].ad_type == type) {
ret = der_copy_octet_string(&ad->val[i].ad_data, data);
if (ret) {
krb5_set_error_message(context, ret,
N_("malloc: out of memory", ""));
goto out;
}
*found = TRUE;
continue;
}
switch (ad->val[i].ad_type) {
case KRB5_AUTHDATA_IF_RELEVANT: {
AuthorizationData child;
ret = decode_AuthorizationData(ad->val[i].ad_data.data,
ad->val[i].ad_data.length,
&child,
NULL);
if (ret) {
krb5_set_error_message(context, ret,
N_("Failed to decode "
"IF_RELEVANT with %d", ""),
(int)ret);
goto out;
}
ret = find_type_in_ad(context, type, data, found, FALSE,
sessionkey, &child, level + 1);
free_AuthorizationData(&child);
if (ret)
goto out;
break;
}
#if 0 /* XXX test */
case KRB5_AUTHDATA_KDC_ISSUED: {
AD_KDCIssued child;
ret = decode_AD_KDCIssued(ad->val[i].ad_data.data,
ad->val[i].ad_data.length,
&child,
NULL);
if (ret) {
krb5_set_error_message(context, ret,
N_("Failed to decode "
"AD_KDCIssued with %d", ""),
ret);
goto out;
}
if (failp) {
krb5_boolean valid;
krb5_data buf;
size_t len;
ASN1_MALLOC_ENCODE(AuthorizationData, buf.data, buf.length,
&child.elements, &len, ret);
if (ret) {
free_AD_KDCIssued(&child);
krb5_clear_error_message(context);
goto out;
}
if(buf.length != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
ret = krb5_c_verify_checksum(context, sessionkey, 19, &buf,
&child.ad_checksum, &valid);
krb5_data_free(&buf);
if (ret) {
free_AD_KDCIssued(&child);
goto out;
}
if (!valid) {
krb5_clear_error_message(context);
ret = ENOENT;
free_AD_KDCIssued(&child);
goto out;
}
}
ret = find_type_in_ad(context, type, data, found, failp, sessionkey,
&child.elements, level + 1);
free_AD_KDCIssued(&child);
if (ret)
goto out;
break;
}
#endif
case KRB5_AUTHDATA_AND_OR:
if (!failp)
break;
ret = ENOENT; /* XXX */
krb5_set_error_message(context, ret,
N_("Authorization data contains "
"AND-OR element that is unknown to the "
"application", ""));
goto out;
default:
if (!failp)
break;
ret = ENOENT; /* XXX */
krb5_set_error_message(context, ret,
N_("Authorization data contains "
"unknown type (%d) ", ""),
ad->val[i].ad_type);
goto out;
}
}
out:
if (ret) {
if (*found) {
krb5_data_free(data);
*found = 0;
}
}
return ret;
}
