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add support for anonyous tickets

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@8013 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
2000-03-04 15:55:38 +00:00
parent 6304efeecc
commit 653d311970
4 changed files with 70 additions and 20 deletions
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5
kdc/config.c
View File

@@ -58,6 +58,7 @@ krb5_boolean encode_as_rep_as_tgs_rep; /* bug compatibility */
krb5_boolean check_ticket_addresses;
krb5_boolean allow_null_ticket_addresses;
krb5_boolean allow_anonymous;
static struct getarg_strings addresses_str; /* addresses to listen on */
krb5_addresses explicit_addresses;
@@ -297,6 +298,10 @@ configure(int argc, char **argv)
allow_null_ticket_addresses =
krb5_config_get_bool(context, cf, "kdc",
"allow-null-ticket-addresses", NULL);
allow_anonymous =
krb5_config_get_bool(context, cf, "kdc",
"allow-anonymous", NULL);
#ifdef KRB4
if(v4_realm == NULL){
p = krb5_config_get_string (context, cf,

2
kdc/kdc.8
View File

@@ -121,6 +121,8 @@ default is FALSE.
.It Li allow-null-ticket-addresses = Va boolean
Permit tickets with no addresses. This option is only relevant when
check-ticket-addresses is TRUE.
.It Li allow-anonymous = Va boolean
Permit anonymous tickets with no addresses.
.It encode_as_rep_as_tgs_rep = Va boolean
Encode AS-Rep as TGS-Rep to be bug-compatible with old DCE code. The
Heimdal clients allow both.

1
kdc/kdc_locl.h
View File

@@ -61,6 +61,7 @@ extern int enable_http;
extern krb5_boolean encode_as_rep_as_tgs_rep;
extern krb5_boolean check_ticket_addresses;
extern krb5_boolean allow_null_ticket_addresses;
extern krb5_boolean allow_anonymous;
#ifdef KRB4
extern char *v4_realm;

82
kdc/kerberos5.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1997-1999 Kungliga Tekniska Högskolan
* Copyright (c) 1997-2000 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
@@ -165,6 +165,23 @@ find_keys(hdb_entry *client,
}
#endif
static krb5_error_code
make_anonymous_principalname (PrincipalName *pn)
{
pn->name_type = KRB5_NT_PRINCIPAL;
pn->name_string.len = 1;
pn->name_string.val = malloc(sizeof(*pn->name_string.val));
if (pn->name_string.val == NULL)
return ENOMEM;
pn->name_string.val[0] = strdup("anonymous");
if (pn->name_string.val[0] == NULL) {
free(pn->name_string.val);
pn->name_string.val = NULL;
return ENOMEM;
}
return 0;
}
static krb5_error_code
encode_reply(KDC_REP *rep, EncTicketPart *et, EncKDCRepPart *ek,
krb5_enctype etype,
@@ -321,6 +338,12 @@ get_pa_etype_info(METHOD_DATA *md, hdb_entry *client)
return 0;
}
/*
* verify the flags on `client' and `server', returning 0
* if they are OK and generating an error messages and returning
* and error code otherwise.
*/
static int
check_flags(hdb_entry *client, const char *client_name,
hdb_entry *server, const char *server_name,
@@ -393,11 +416,18 @@ check_flags(hdb_entry *client, const char *client_name,
return 0;
}
/*
* Return TRUE if `from' is part of `addresses' taking into consideration
* the configuration variables that tells us how strict we should be about
* these checks
*/
static krb5_boolean
check_addresses(HostAddresses *addresses, struct sockaddr *from)
check_addresses(HostAddresses *addresses, const struct sockaddr *from)
{
krb5_error_code ret;
krb5_address addr;
krb5_boolean result;
if(check_ticket_addresses == 0)
return TRUE;
@@ -409,7 +439,9 @@ check_addresses(HostAddresses *addresses, struct sockaddr *from)
if(ret)
return FALSE;
return krb5_address_search(context, &addr, addresses);
result = krb5_address_search(context, &addr, addresses);
krb5_free_address (context, &addr);
return result;
}
krb5_error_code
@@ -430,9 +462,10 @@ as_rep(KDC_REQ *req,
krb5_error_code ret = 0;
const char *e_text = NULL;
krb5_crypto crypto;
Key *ckey, *skey;
memset(&rep, 0, sizeof(rep));
if(b->sname == NULL){
server_name = "<unknown server>";
ret = KRB5KRB_ERR_GENERIC;
@@ -634,16 +667,6 @@ as_rep(KDC_REQ *req,
free(set);
}
memset(&rep, 0, sizeof(rep));
rep.pvno = 5;
rep.msg_type = krb_as_rep;
copy_Realm(&b->realm, &rep.crealm);
copy_PrincipalName(b->cname, &rep.cname);
rep.ticket.tkt_vno = 5;
copy_Realm(&b->realm, &rep.ticket.realm);
copy_PrincipalName(b->sname, &rep.ticket.sname);
{
char str[128];
unparse_flags(KDCOptions2int(f), KDCOptions_units, str, sizeof(str));
@@ -651,13 +674,25 @@ as_rep(KDC_REQ *req,
kdc_log(2, "Requested flags: %s", str);
}
if(f.renew || f.validate || f.proxy || f.forwarded || f.enc_tkt_in_skey ||
f.request_anonymous){
if(f.renew || f.validate || f.proxy || f.forwarded || f.enc_tkt_in_skey
|| (f.request_anonymous && !allow_anonymous)) {
ret = KRB5KDC_ERR_BADOPTION;
kdc_log(0, "Bad KDC options -- %s", client_name);
goto out;
}
rep.pvno = 5;
rep.msg_type = krb_as_rep;
copy_Realm(&b->realm, &rep.crealm);
if (f.request_anonymous)
make_anonymous_principalname (&rep.cname);
else
copy_PrincipalName(b->cname, &rep.cname);
rep.ticket.tkt_vno = 5;
copy_Realm(&b->realm, &rep.ticket.realm);
copy_PrincipalName(b->sname, &rep.ticket.sname);
et.flags.initial = 1;
if(client->flags.forwardable && server->flags.forwardable)
et.flags.forwardable = f.forwardable;
@@ -689,7 +724,7 @@ as_rep(KDC_REQ *req,
}
krb5_generate_random_keyblock(context, setype, &et.key);
copy_PrincipalName(b->cname, &et.cname);
copy_PrincipalName(&rep.cname, &et.cname);
copy_Realm(&b->realm, &et.crealm);
{
@@ -739,6 +774,9 @@ as_rep(KDC_REQ *req,
et.flags.renewable = 1;
}
}
if (f.request_anonymous)
et.flags.anonymous = 1;
if(b->addresses){
ALLOC(et.caddr);
@@ -952,7 +990,7 @@ check_tgs_flags(KDC_REQ_BODY *b, EncTicketPart *tgt, EncTicketPart *et)
}
/* checks for excess flags */
if(f.request_anonymous){
if(f.request_anonymous && !allow_anonymous){
kdc_log(0, "Request for anonymous ticket");
return KRB5KDC_ERR_BADOPTION;
}
@@ -1089,7 +1127,10 @@ tgs_make_reply(KDC_REQ_BODY *b,
&rep.ticket.realm);
krb5_principal2principalname(&rep.ticket.sname, server->principal);
copy_Realm(&tgt->crealm, &rep.crealm);
copy_PrincipalName(&tgt->cname, &rep.cname);
if (f.request_anonymous)
make_anonymous_principalname (&tgt->cname);
else
copy_PrincipalName(&tgt->cname, &rep.cname);
rep.ticket.tkt_vno = 5;
ek.caddr = et.caddr;
@@ -1140,7 +1181,8 @@ tgs_make_reply(KDC_REQ_BODY *b,
}
et.flags.pre_authent = tgt->flags.pre_authent;
et.flags.hw_authent = tgt->flags.hw_authent;
et.flags.hw_authent = tgt->flags.hw_authent;
et.flags.anonymous = tgt->flags.anonymous;
/* XXX Check enc-authorization-data */
et.authorization_data = auth_data;