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Diffstat (limited to 'source4/heimdal/lib/krb5/get_cred.c')
-rw-r--r--source4/heimdal/lib/krb5/get_cred.c346
1 files changed, 322 insertions, 24 deletions
diff --git a/source4/heimdal/lib/krb5/get_cred.c b/source4/heimdal/lib/krb5/get_cred.c
index 1fa3f9143e..b404c30f6e 100644
--- a/source4/heimdal/lib/krb5/get_cred.c
+++ b/source4/heimdal/lib/krb5/get_cred.c
@@ -33,7 +33,7 @@
#include <krb5_locl.h>
-RCSID("$Id: get_cred.c,v 1.109 2006/02/03 11:41:02 lha Exp $");
+RCSID("$Id: get_cred.c,v 1.112 2006/06/06 21:22:54 lha Exp $");
/*
* Take the `body' and encode it into `padata' using the credentials
@@ -142,6 +142,7 @@ init_tgs_req (krb5_context context,
krb5_creds *in_creds,
krb5_creds *krbtgt,
unsigned nonce,
+ const METHOD_DATA *padata,
krb5_keyblock **subkey,
TGS_REQ *t,
krb5_key_usage usage)
@@ -220,12 +221,22 @@ init_tgs_req (krb5_context context,
krb5_set_error_string(context, "malloc: out of memory");
goto fail;
}
- ALLOC_SEQ(t->padata, 1);
+ ALLOC_SEQ(t->padata, 1 + padata->len);
if (t->padata->val == NULL) {
ret = ENOMEM;
krb5_set_error_string(context, "malloc: out of memory");
goto fail;
}
+ {
+ int i;
+ for (i = 0; i < padata->len; i++) {
+ ret = copy_PA_DATA(&padata->val[i], &t->padata->val[i + 1]);
+ if (ret) {
+ krb5_set_error_string(context, "malloc: out of memory");
+ goto fail;
+ }
+ }
+ }
{
krb5_auth_context ac;
@@ -268,7 +279,7 @@ init_tgs_req (krb5_context context,
ret = make_pa_tgs_req(context,
ac,
&t->req_body,
- t->padata->val,
+ &t->padata->val[0],
krbtgt,
usage);
if(ret) {
@@ -383,8 +394,10 @@ get_cred_kdc_usage(krb5_context context,
krb5_ccache id,
krb5_kdc_flags flags,
krb5_addresses *addresses,
- krb5_creds *in_creds,
+ krb5_creds *in_creds,
krb5_creds *krbtgt,
+ krb5_principal impersonate_principal,
+ Ticket *second_ticket,
krb5_creds *out_creds,
krb5_key_usage usage)
{
@@ -397,36 +410,91 @@ get_cred_kdc_usage(krb5_context context,
unsigned nonce;
krb5_keyblock *subkey = NULL;
size_t len;
- Ticket second_ticket;
+ Ticket second_ticket_data;
int send_to_kdc_flags = 0;
+ 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){
+ 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, &len);
+ &second_ticket_data, &len);
if(ret)
return ret;
+ second_ticket = &second_ticket_data;
+ }
+
+
+ if (impersonate_principal) {
+ krb5_crypto crypto;
+ PA_S4U2Self self;
+ krb5_data data;
+ void *buf;
+ size_t size;
+
+ self.name = impersonate_principal->name;
+ self.realm = impersonate_principal->realm;
+ self.auth = estrdup("Kerberos");
+
+ ret = _krb5_s4u2self_to_checksumdata(context, &self, &data);
+ if (ret) {
+ free(self.auth);
+ goto out;
+ }
+
+ ret = krb5_crypto_init(context, &krbtgt->session, 0, &crypto);
+ if (ret) {
+ free(self.auth);
+ krb5_data_free(&data);
+ goto out;
+ }
+
+ ret = krb5_create_checksum(context,
+ crypto,
+ KRB5_KU_TGS_IMPERSONATE,
+ 0,
+ data.data,
+ data.length,
+ &self.cksum);
+ krb5_crypto_destroy(context, crypto);
+ krb5_data_free(&data);
+ if (ret) {
+ free(self.auth);
+ goto out;
+ }
+
+ ASN1_MALLOC_ENCODE(PA_S4U2Self, buf, len, &self, &size, ret);
+ free(self.auth);
+ free_Checksum(&self.cksum);
+ if (ret)
+ goto out;
+ if (len != size)
+ krb5_abortx(context, "internal asn1 error");
+
+ ret = krb5_padata_add(context, &padata, KRB5_PADATA_S4U2SELF, buf, len);
+ if (ret)
+ goto out;
}
ret = init_tgs_req (context,
id,
addresses,
flags,
- flags.b.enc_tkt_in_skey ? &second_ticket : NULL,
+ second_ticket,
in_creds,
krbtgt,
nonce,
+ &padata,
&subkey,
&req,
usage);
- if(flags.b.enc_tkt_in_skey)
- free_Ticket(&second_ticket);
if (ret)
goto out;
@@ -475,7 +543,7 @@ again:
&krbtgt->addresses,
nonce,
TRUE,
- flags.b.request_anonymous,
+ TRUE /* flags.b.request_anonymous */,
decrypt_tkt_with_subkey,
subkey);
krb5_free_kdc_rep(context, &rep);
@@ -497,6 +565,9 @@ again:
}
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){
@@ -514,16 +585,20 @@ get_cred_kdc(krb5_context context,
krb5_addresses *addresses,
krb5_creds *in_creds,
krb5_creds *krbtgt,
+ krb5_principal impersonate_principal,
+ Ticket *second_ticket,
krb5_creds *out_creds)
{
krb5_error_code ret;
ret = get_cred_kdc_usage(context, id, flags, addresses, in_creds,
- krbtgt, out_creds, KRB5_KU_TGS_REQ_AUTH);
+ krbtgt, impersonate_principal, second_ticket,
+ out_creds, KRB5_KU_TGS_REQ_AUTH);
if (ret == KRB5KRB_AP_ERR_BAD_INTEGRITY) {
krb5_clear_error_string (context);
ret = get_cred_kdc_usage(context, id, flags, addresses, in_creds,
- krbtgt, out_creds, KRB5_KU_AP_REQ_AUTH);
+ krbtgt, impersonate_principal, second_ticket,
+ out_creds, KRB5_KU_AP_REQ_AUTH);
}
return ret;
}
@@ -533,6 +608,7 @@ get_cred_kdc(krb5_context context,
static krb5_error_code
get_cred_kdc_la(krb5_context context, krb5_ccache id, krb5_kdc_flags flags,
krb5_creds *in_creds, krb5_creds *krbtgt,
+ krb5_principal impersonate_principal, Ticket *second_ticket,
krb5_creds *out_creds)
{
krb5_error_code ret;
@@ -543,7 +619,8 @@ get_cred_kdc_la(krb5_context context, krb5_ccache id, krb5_kdc_flags flags,
if(addresses.len == 0)
addrs = NULL;
ret = get_cred_kdc(context, id, flags, addrs,
- in_creds, krbtgt, out_creds);
+ in_creds, krbtgt, impersonate_principal, second_ticket,
+ out_creds);
krb5_free_addresses(context, &addresses);
return ret;
}
@@ -575,7 +652,7 @@ krb5_get_kdc_cred(krb5_context context,
return ret;
}
ret = get_cred_kdc(context, id, flags, addresses,
- in_creds, krbtgt, *out_creds);
+ in_creds, krbtgt, NULL, NULL, *out_creds);
krb5_free_creds (context, krbtgt);
if(ret)
free(*out_creds);
@@ -607,7 +684,17 @@ find_cred(krb5_context context,
}
tgts++;
}
- krb5_clear_error_string(context);
+ {
+ char *str;
+ ret = krb5_unparse_name(context, server, &str);
+ if(ret == 0) {
+ krb5_set_error_string(context, "Matching credential "
+ "(%s) not found", str);
+ free(str);
+ } else {
+ krb5_clear_error_string(context);
+ }
+ }
return KRB5_CC_NOTFOUND;
}
@@ -650,6 +737,8 @@ get_cred_from_kdc_flags(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)
{
@@ -707,10 +796,16 @@ get_cred_from_kdc_flags(krb5_context context,
if (noaddr)
ret = get_cred_kdc(context, ccache, flags, NULL,
- in_creds, &tgts, *out_creds);
+ in_creds, &tgts,
+ impersonate_principal,
+ second_ticket,
+ *out_creds);
else
ret = get_cred_kdc_la(context, ccache, flags,
- in_creds, &tgts, *out_creds);
+ in_creds, &tgts,
+ impersonate_principal,
+ second_ticket,
+ *out_creds);
if (ret) {
free (*out_creds);
*out_creds = NULL;
@@ -731,7 +826,7 @@ get_cred_from_kdc_flags(krb5_context context,
heim_general_string tgt_inst;
ret = get_cred_from_kdc_flags(context, flags, ccache, &tmp_creds,
- &tgt, ret_tgts);
+ NULL, NULL, &tgt, ret_tgts);
if(ret) {
krb5_free_principal(context, tmp_creds.server);
krb5_free_principal(context, tmp_creds.client);
@@ -776,10 +871,12 @@ get_cred_from_kdc_flags(krb5_context context,
&noaddr);
if (noaddr)
ret = get_cred_kdc (context, ccache, flags, NULL,
- in_creds, tgt, *out_creds);
+ in_creds, tgt, NULL, NULL,
+ *out_creds);
else
ret = get_cred_kdc_la(context, ccache, flags,
- in_creds, tgt, *out_creds);
+ in_creds, tgt, NULL, NULL,
+ *out_creds);
if (ret) {
free (*out_creds);
*out_creds = NULL;
@@ -800,7 +897,8 @@ krb5_get_cred_from_kdc_opt(krb5_context context,
krb5_kdc_flags f;
f.i = flags;
return get_cred_from_kdc_flags(context, f, ccache,
- in_creds, out_creds, ret_tgts);
+ in_creds, NULL, NULL,
+ out_creds, ret_tgts);
}
krb5_error_code KRB5_LIB_FUNCTION
@@ -879,15 +977,18 @@ krb5_get_credentials_with_flags(krb5_context context,
}
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 = get_cred_from_kdc_flags(context, flags, ccache,
- in_creds, out_creds, &tgts);
+ in_creds, NULL, NULL, out_creds, &tgts);
for(i = 0; tgts && tgts[i]; i++) {
krb5_cc_store_cred(context, ccache, tgts[i]);
krb5_free_creds(context, tgts[i]);
}
free(tgts);
- if(ret == 0 && flags.b.enc_tkt_in_skey == 0)
+ if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
krb5_cc_store_cred(context, ccache, *out_creds);
return ret;
}
@@ -904,3 +1005,200 @@ krb5_get_credentials(krb5_context context,
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_error_code KRB5_LIB_FUNCTION
+krb5_get_creds_opt_alloc(krb5_context context, krb5_get_creds_opt *opt)
+{
+ *opt = calloc(1, sizeof(**opt));
+ if (*opt == NULL) {
+ krb5_set_error_string(context, "malloc: out of memory");
+ return ENOMEM;
+ }
+ return 0;
+}
+
+void KRB5_LIB_FUNCTION
+krb5_get_creds_opt_free(krb5_context context, krb5_get_creds_opt opt)
+{
+ if (opt->self)
+ krb5_free_principal(context, opt->self);
+ memset(opt, 0, sizeof(*opt));
+ free(opt);
+}
+
+void KRB5_LIB_FUNCTION
+krb5_get_creds_opt_set_options(krb5_context context,
+ krb5_get_creds_opt opt,
+ krb5_flags options)
+{
+ opt->options = options;
+}
+
+void KRB5_LIB_FUNCTION
+krb5_get_creds_opt_add_options(krb5_context context,
+ krb5_get_creds_opt opt,
+ krb5_flags options)
+{
+ opt->options |= options;
+}
+
+void KRB5_LIB_FUNCTION
+krb5_get_creds_opt_set_enctype(krb5_context context,
+ krb5_get_creds_opt opt,
+ krb5_enctype enctype)
+{
+ opt->enctype = enctype;
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+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_error_code KRB5_LIB_FUNCTION
+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_string(context, "malloc: out of memory");
+ return ENOMEM;
+ }
+ ret = copy_Ticket(ticket, opt->ticket);
+ if (ret) {
+ free(opt->ticket);
+ opt->ticket = NULL;
+ krb5_set_error_string(context, "malloc: out of memory");
+ return ret;
+ }
+ }
+ return 0;
+}
+
+
+
+krb5_error_code KRB5_LIB_FUNCTION
+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;
+ int i;
+
+ memset(&in_creds, 0, sizeof(in_creds));
+ in_creds.server = rk_UNCONST(inprinc);
+
+ ret = krb5_cc_get_principal(context, ccache, &in_creds.client);
+ if (ret)
+ return ret;
+
+ options = opt->options;
+ 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_string(context, "malloc: out of memory");
+ return ENOMEM;
+ }
+
+ if (opt->enctype) {
+ in_creds.session.keytype = opt->enctype;
+ options |= KRB5_TC_MATCH_KEYTYPE;
+ }
+
+ /*
+ * If we got a credential, check if credential is expired before
+ * returning it.
+ */
+ ret = krb5_cc_retrieve_cred(context,
+ ccache,
+ opt->enctype ? KRB5_TC_MATCH_KEYTYPE : 0,
+ &in_creds, res_creds);
+ /*
+ * If we got a credential, check if credential is expired before
+ * returning it, but only if KRB5_GC_EXPIRED_OK is not set.
+ */
+ if (ret == 0) {
+ krb5_timestamp timeret;
+
+ /* If expired ok, don't bother checking */
+ if(options & KRB5_GC_EXPIRED_OK) {
+ *out_creds = res_creds;
+ krb5_free_principal(context, in_creds.client);
+ return 0;
+ }
+
+ krb5_timeofday(context, &timeret);
+ if(res_creds->times.endtime > timeret) {
+ *out_creds = res_creds;
+ krb5_free_principal(context, in_creds.client);
+ return 0;
+ }
+ if(options & KRB5_GC_CACHED)
+ krb5_cc_remove_cred(context, ccache, 0, res_creds);
+
+ } else if(ret != KRB5_CC_END) {
+ free(res_creds);
+ krb5_free_principal(context, in_creds.client);
+ return ret;
+ }
+ free(res_creds);
+ if(options & KRB5_GC_CACHED) {
+ krb5_clear_error_string (context);
+ krb5_free_principal(context, in_creds.client);
+ return KRB5_CC_NOTFOUND;
+ }
+ 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;
+
+ tgts = NULL;
+ ret = get_cred_from_kdc_flags(context, flags, ccache,
+ &in_creds, opt->self, opt->ticket,
+ out_creds, &tgts);
+ krb5_free_principal(context, in_creds.client);
+ for(i = 0; tgts && tgts[i]; i++) {
+ krb5_cc_store_cred(context, ccache, tgts[i]);
+ krb5_free_creds(context, tgts[i]);
+ }
+ free(tgts);
+ if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
+ krb5_cc_store_cred(context, ccache, *out_creds);
+ return ret;
+}