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path: root/crypto/heimdal/lib/krb5/get_cred.c
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Diffstat (limited to 'crypto/heimdal/lib/krb5/get_cred.c')
-rw-r--r--crypto/heimdal/lib/krb5/get_cred.c555
1 files changed, 482 insertions, 73 deletions
diff --git a/crypto/heimdal/lib/krb5/get_cred.c b/crypto/heimdal/lib/krb5/get_cred.c
index cae47f5763d7..ce0ec6d29283 100644
--- a/crypto/heimdal/lib/krb5/get_cred.c
+++ b/crypto/heimdal/lib/krb5/get_cred.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 1997 - 2004 Kungliga Tekniska Högskolan
+ * Copyright (c) 1997 - 2007 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
@@ -33,7 +33,7 @@
#include <krb5_locl.h>
-RCSID("$Id: get_cred.c,v 1.91.4.3 2004/01/09 00:47:17 lha Exp $");
+RCSID("$Id: get_cred.c 21668 2007-07-22 11:28:05Z lha $");
/*
* Take the `body' and encode it into `padata' using the credentials
@@ -62,12 +62,12 @@ make_pa_tgs_req(krb5_context context,
in_data.length = len;
in_data.data = buf;
- ret = krb5_mk_req_internal(context, &ac, 0, &in_data, creds,
- &padata->padata_value,
- KRB5_KU_TGS_REQ_AUTH_CKSUM,
- usage
- /* KRB5_KU_TGS_REQ_AUTH */);
-out:
+ ret = _krb5_mk_req_internal(context, &ac, 0, &in_data, creds,
+ &padata->padata_value,
+ KRB5_KU_TGS_REQ_AUTH_CKSUM,
+ usage
+ /* KRB5_KU_TGS_REQ_AUTH */);
+ out:
free (buf);
if(ret)
return ret;
@@ -86,14 +86,17 @@ set_auth_data (krb5_context context,
krb5_keyblock *key)
{
if(authdata->len) {
- size_t len;
+ size_t len, buf_size;
unsigned char *buf;
krb5_crypto crypto;
krb5_error_code ret;
- ASN1_MALLOC_ENCODE(AuthorizationData, buf, len, authdata, &len, ret);
+ ASN1_MALLOC_ENCODE(AuthorizationData, buf, buf_size, authdata,
+ &len, ret);
if (ret)
return ret;
+ if (buf_size != len)
+ krb5_abortx(context, "internal error in ASN.1 encoder");
ALLOC(req_body->enc_authorization_data, 1);
if (req_body->enc_authorization_data == NULL) {
@@ -105,6 +108,7 @@ set_auth_data (krb5_context context,
if (ret) {
free (buf);
free (req_body->enc_authorization_data);
+ req_body->enc_authorization_data = NULL;
return ret;
}
krb5_encrypt_EncryptedData(context,
@@ -138,6 +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)
@@ -216,12 +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;
@@ -252,7 +267,8 @@ init_tgs_req (krb5_context context,
}
}
- ret = set_auth_data (context, &t->req_body, &in_creds->authdata, key);
+ ret = set_auth_data (context, &t->req_body, &in_creds->authdata,
+ key ? key : &krbtgt->session);
if (ret) {
if (key)
krb5_free_keyblock (context, key);
@@ -263,7 +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) {
@@ -345,7 +361,7 @@ decrypt_tkt_with_subkey (krb5_context context,
krb5_crypto_destroy(context, crypto);
if(ret && subkey){
/* DCE compat -- try to decrypt with subkey */
- ret = krb5_crypto_init(context, (krb5_keyblock*)subkey, 0, &crypto);
+ ret = krb5_crypto_init(context, subkey, 0, &crypto);
if (ret)
return ret;
ret = krb5_decrypt_EncryptedData (context,
@@ -378,8 +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)
{
@@ -391,58 +409,119 @@ get_cred_kdc_usage(krb5_context context,
krb5_error_code ret;
unsigned nonce;
krb5_keyblock *subkey = NULL;
- u_char *buf = NULL;
- size_t buf_size;
size_t len;
- Ticket second_ticket;
+ Ticket second_ticket_data;
+ 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_OTHER_CKSUM,
+ 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;
- ASN1_MALLOC_ENCODE(TGS_REQ, buf, buf_size, &req, &enc.length, ret);
+ ASN1_MALLOC_ENCODE(TGS_REQ, enc.data, enc.length, &req, &len, ret);
if (ret)
goto out;
- if(enc.length != buf_size)
+ if(enc.length != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
/* don't free addresses */
req.req_body.addresses = NULL;
free_TGS_REQ(&req);
- enc.data = buf + buf_size - enc.length;
- if (ret)
- goto out;
-
/*
* Send and receive
*/
+ {
+ krb5_sendto_ctx stctx;
+ ret = krb5_sendto_ctx_alloc(context, &stctx);
+ if (ret)
+ return ret;
+ krb5_sendto_ctx_set_func(stctx, _krb5_kdc_retry, NULL);
- ret = krb5_sendto_kdc (context, &enc,
- &krbtgt->server->name.name_string.val[1], &resp);
+ ret = krb5_sendto_context (context, stctx, &enc,
+ krbtgt->server->name.name_string.val[1],
+ &resp);
+ krb5_sendto_ctx_free(context, stctx);
+ }
if(ret)
goto out;
@@ -469,13 +548,11 @@ get_cred_kdc_usage(krb5_context context,
KRB5_KU_TGS_REP_ENC_PART_SESSION,
&krbtgt->addresses,
nonce,
- TRUE,
- flags.b.request_anonymous,
+ EXTRACT_TICKET_ALLOW_CNAME_MISMATCH|
+ EXTRACT_TICKET_ALLOW_SERVER_MISMATCH,
decrypt_tkt_with_subkey,
subkey);
krb5_free_kdc_rep(context, &rep);
- if (ret)
- goto out;
} else if(krb5_rd_error(context, &resp, &error) == 0) {
ret = krb5_error_from_rd_error(context, &error, in_creds);
krb5_free_error_contents(context, &error);
@@ -486,14 +563,17 @@ get_cred_kdc_usage(krb5_context context,
ret = KRB5KRB_AP_ERR_MSG_TYPE;
krb5_clear_error_string(context);
}
+
+out:
+ if (second_ticket == &second_ticket_data)
+ free_Ticket(&second_ticket_data);
+ free_METHOD_DATA(&padata);
krb5_data_free(&resp);
- out:
+ krb5_data_free(&enc);
if(subkey){
krb5_free_keyblock_contents(context, subkey);
free(subkey);
}
- if (buf)
- free (buf);
return ret;
}
@@ -505,16 +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;
}
@@ -524,6 +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;
@@ -534,12 +619,13 @@ 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;
}
-krb5_error_code
+krb5_error_code KRB5_LIB_FUNCTION
krb5_get_kdc_cred(krb5_context context,
krb5_ccache id,
krb5_kdc_flags flags,
@@ -566,13 +652,27 @@ 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);
return ret;
}
+static void
+not_found(krb5_context context, krb5_const_principal p)
+{
+ krb5_error_code ret;
+ char *str;
+
+ ret = krb5_unparse_name(context, p, &str);
+ if(ret) {
+ krb5_clear_error_string(context);
+ return;
+ }
+ krb5_set_error_string(context, "Matching credential (%s) not found", str);
+ free(str);
+}
static krb5_error_code
find_cred(krb5_context context,
@@ -583,6 +683,8 @@ find_cred(krb5_context context,
{
krb5_error_code ret;
krb5_creds mcreds;
+
+ krb5_cc_clear_mcred(&mcreds);
mcreds.server = server;
ret = krb5_cc_retrieve_cred(context, id, KRB5_TC_DONT_MATCH_REALM,
&mcreds, out_creds);
@@ -596,7 +698,7 @@ find_cred(krb5_context context,
}
tgts++;
}
- krb5_clear_error_string(context);
+ not_found(context, server);
return KRB5_CC_NOTFOUND;
}
@@ -639,6 +741,8 @@ 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)
{
@@ -648,8 +752,8 @@ get_cred_from_kdc_flags(krb5_context context,
*out_creds = NULL;
- client_realm = *krb5_princ_realm(context, in_creds->client);
- server_realm = *krb5_princ_realm(context, in_creds->server);
+ client_realm = krb5_principal_get_realm(context, in_creds->client);
+ server_realm = krb5_principal_get_realm(context, in_creds->server);
memset(&tmp_creds, 0, sizeof(tmp_creds));
ret = krb5_copy_principal(context, in_creds->client, &tmp_creds.client);
if(ret)
@@ -696,31 +800,37 @@ 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;
}
}
- krb5_free_creds_contents(context, &tgts);
+ krb5_free_cred_contents(context, &tgts);
krb5_free_principal(context, tmp_creds.server);
krb5_free_principal(context, tmp_creds.client);
return ret;
}
}
if(krb5_realm_compare(context, in_creds->client, in_creds->server)) {
- krb5_clear_error_string (context);
+ not_found(context, in_creds->server);
return KRB5_CC_NOTFOUND;
}
/* XXX this can loop forever */
while(1){
- general_string tgt_inst;
+ 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);
@@ -761,13 +871,16 @@ get_cred_from_kdc_flags(krb5_context context,
krb5_boolean noaddr;
krb5_appdefault_boolean(context, NULL, tgt->server->realm,
- "no-addresses", FALSE, &noaddr);
+ "no-addresses", KRB5_ADDRESSLESS_DEFAULT,
+ &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;
@@ -777,7 +890,7 @@ get_cred_from_kdc_flags(krb5_context context,
return ret;
}
-krb5_error_code
+krb5_error_code KRB5_LIB_FUNCTION
krb5_get_cred_from_kdc_opt(krb5_context context,
krb5_ccache ccache,
krb5_creds *in_creds,
@@ -788,10 +901,11 @@ 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_error_code KRB5_LIB_FUNCTION
krb5_get_cred_from_kdc(krb5_context context,
krb5_ccache ccache,
krb5_creds *in_creds,
@@ -803,7 +917,7 @@ krb5_get_cred_from_kdc(krb5_context context,
}
-krb5_error_code
+krb5_error_code KRB5_LIB_FUNCTION
krb5_get_credentials_with_flags(krb5_context context,
krb5_flags options,
krb5_kdc_flags flags,
@@ -823,38 +937,67 @@ krb5_get_credentials_with_flags(krb5_context context,
return ENOMEM;
}
+ if (in_creds->session.keytype)
+ 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,
- in_creds->session.keytype ?
- KRB5_TC_MATCH_KEYTYPE : 0,
- in_creds, res_creds);
- if(ret == 0) {
- *out_creds = res_creds;
- return 0;
+ ccache,
+ in_creds->session.keytype ?
+ 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;
+ return 0;
+ }
+
+ krb5_timeofday(context, &timeret);
+ if(res_creds->times.endtime > timeret) {
+ *out_creds = res_creds;
+ 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);
+ return ret;
}
free(res_creds);
- if(ret != KRB5_CC_END)
- return ret;
if(options & KRB5_GC_CACHED) {
- krb5_clear_error_string (context);
- return KRB5_CC_NOTFOUND;
+ not_found(context, in_creds->server);
+ return KRB5_CC_NOTFOUND;
}
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;
}
-krb5_error_code
+krb5_error_code KRB5_LIB_FUNCTION
krb5_get_credentials(krb5_context context,
krb5_flags options,
krb5_ccache ccache,
@@ -866,3 +1009,269 @@ 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) {
+ not_found(context, in_creds.server);
+ 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;
+ if (options & KRB5_GC_CONSTRAINED_DELEGATION) {
+ flags.b.request_anonymous = 1; /* XXX ARGH confusion */
+ flags.b.constrained_delegation = 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;
+}
+
+/*
+ *
+ */
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_get_renewed_creds(krb5_context context,
+ krb5_creds *creds,
+ krb5_const_principal client,
+ krb5_ccache ccache,
+ const char *in_tkt_service)
+{
+ krb5_error_code ret;
+ krb5_kdc_flags flags;
+ krb5_creds in, *template, *out = NULL;
+
+ memset(&in, 0, sizeof(in));
+ memset(creds, 0, sizeof(*creds));
+
+ ret = krb5_copy_principal(context, client, &in.client);
+ if (ret)
+ return ret;
+
+ if (in_tkt_service) {
+ ret = krb5_parse_name(context, in_tkt_service, &in.server);
+ if (ret) {
+ krb5_free_principal(context, in.client);
+ return ret;
+ }
+ } else {
+ const char *realm = krb5_principal_get_realm(context, client);
+
+ ret = krb5_make_principal(context, &in.server, realm, KRB5_TGS_NAME,
+ realm, NULL);
+ if (ret) {
+ krb5_free_principal(context, in.client);
+ return ret;
+ }
+ }
+
+ flags.i = 0;
+ flags.b.renewable = flags.b.renew = 1;
+
+ /*
+ * Get template from old credential cache for the same entry, if
+ * this failes, no worries.
+ */
+ ret = krb5_get_credentials(context, KRB5_GC_CACHED, ccache, &in, &template);
+ if (ret == 0) {
+ flags.b.forwardable = template->flags.b.forwardable;
+ flags.b.proxiable = template->flags.b.proxiable;
+ krb5_free_creds (context, template);
+ }
+
+ ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &in, &out);
+ krb5_free_principal(context, in.client);
+ krb5_free_principal(context, in.server);
+ if (ret)
+ return ret;
+
+ ret = krb5_copy_creds_contents(context, out, creds);
+ krb5_free_creds(context, out);
+
+ return ret;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 13:22:37 +0000