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(krb5_ticket_get_authorization_data_type): understand

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KRB5_AUTHDATA_IF_RELEVANT and KRB5_AUTHDATA_AND_OR (but have
KRB5_AUTHDATA_KDC_ISSUED commented out for now)


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@16247 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2005-10-27 13:18:25 +00:00
parent d8c4ce5bad
commit 9b2fa77b4d
1 changed files with 150 additions and 10 deletions
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160
lib/krb5/ticket.c
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@@ -97,6 +97,143 @@ krb5_ticket_get_server(krb5_context context,
return krb5_copy_principal(context, ticket->server, server);
}
static int
find_type_in_ad(krb5_context context,
int type,
krb5_data *data,
int *found,
int failp,
krb5_keyblock *sessionkey,
const AuthorizationData *ad,
int level)
{
krb5_error_code ret = ENOENT;
int i;
if (level > 9) {
krb5_set_error_string(context, "Authorization data nested deeper "
"then %d levels, stop searching", level);
ret = ENOENT; /* XXX */
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 = copy_octet_string(&ad->val[i].ad_data, data);
if (ret) {
krb5_set_error_string(context, "malloc - out of memory");
goto out;
}
*found = 1;
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_string(context, "Failed to decode "
"IF_RELEVANT with %d", ret);
goto out;
}
ret = find_type_in_ad(context, type, data, found, 0, 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_string(context, "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_string(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_string(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;
krb5_set_error_string(context, "Authorization data contains "
"AND-OR element that is unknown to the "
"application");
ret = ENOENT; /* XXX */
goto out;
default:
if (!failp)
break;
krb5_set_error_string(context, "Authorization data contains "
"unknown type (%d) ", ad->val[i].ad_type);
ret = ENOENT; /* XXX */
goto out;
}
}
out:
if (ret) {
if (*found) {
krb5_data_free(data);
*found = 0;
}
}
return ret;
}
/*
* Extract the authorization data type of `type' from the
* 'ticket'. Store the field in `data'. This function is to use for
* kerberos applications
*/
krb5_error_code KRB5_LIB_FUNCTION
krb5_ticket_get_authorization_data_type(krb5_context context,
krb5_ticket *ticket,
@@ -104,22 +241,25 @@ krb5_ticket_get_authorization_data_type(krb5_context context,
krb5_data *data)
{
AuthorizationData *ad;
int i;
krb5_error_code ret;
int found = 0;
data->length = 0;
data->data = NULL;
krb5_data_zero(data);
ad = ticket->ticket.authorization_data;
if (ad == NULL) {
if (ticket->ticket.authorization_data == NULL) {
krb5_set_error_string(context, "Ticket have not authorization data");
return ENOENT; /* XXX */
}
for (i = 0; i < ad->len; i++) {
if (ad->val[i].ad_type == type)
return copy_octet_string(&ad->val[i].ad_data, data);
}
krb5_set_error_string(context, "Ticket have not authorization "
ret = find_type_in_ad(context, type, data, &found, 1, &ticket->ticket.key,
ticket->ticket.authorization_data, 0);
if (ret)
return ret;
if (!found) {
krb5_set_error_string(context, "Ticket have not authorization "
"data of type %d", type);
return ENOENT; /* XXX */
return ENOENT; /* XXX */
}
return 0;
}