Copyright (C) Andrew Tridgell 2001
Copyright (C) Luke Howard 2002-2003
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
- Copyright (C) Guenther Deschner 2005-2007
+ Copyright (C) Guenther Deschner 2005-2009
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#ifdef HAVE_KRB5
-#ifdef HAVE_KRB5_KEYBLOCK_KEYVALUE /* Heimdal */
-#define KRB5_KEY_TYPE(k) ((k)->keytype)
-#define KRB5_KEY_LENGTH(k) ((k)->keyvalue.length)
-#define KRB5_KEY_DATA(k) ((k)->keyvalue.data)
-#else /* MIT */
-#define KRB5_KEY_TYPE(k) ((k)->enctype)
-#define KRB5_KEY_LENGTH(k) ((k)->length)
-#define KRB5_KEY_DATA(k) ((k)->contents)
-#endif /* HAVE_KRB5_KEYBLOCK_KEYVALUE */
+#define GSSAPI_CHECKSUM 0x8003 /* Checksum type value for Kerberos */
+#define GSSAPI_BNDLENGTH 16 /* Bind Length (rfc-1964 pg.3) */
+#define GSSAPI_CHECKSUM_SIZE (12+GSSAPI_BNDLENGTH)
+
+#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_FWD_TGT_CREDS) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY)
+static krb5_error_code ads_krb5_get_fwd_ticket( krb5_context context,
+ krb5_auth_context *auth_context,
+ krb5_creds *credsp,
+ krb5_ccache ccache,
+ krb5_data *authenticator);
+#endif
/**************************************************************
Wrappers around kerberos string functions that convert from
{
krb5_error_code ret;
char *utf8_name;
+ size_t converted_size;
- if (push_utf8_allocate(&utf8_name, name) == (size_t)-1) {
+ if (!push_utf8_talloc(talloc_tos(), &utf8_name, name, &converted_size)) {
return ENOMEM;
}
ret = krb5_parse_name(context, utf8_name, principal);
- SAFE_FREE(utf8_name);
+ TALLOC_FREE(utf8_name);
+ return ret;
+}
+
+krb5_error_code smb_krb5_parse_name_flags(krb5_context context,
+ const char *name, /* in unix charset */
+ int flags,
+ krb5_principal *principal)
+{
+ krb5_error_code ret;
+ char *utf8_name;
+ size_t converted_size;
+
+ if (!push_utf8_talloc(talloc_tos(), &utf8_name, name, &converted_size)) {
+ return ENOMEM;
+ }
+
+ ret = krb5_parse_name_flags(context, utf8_name, flags, principal);
+ TALLOC_FREE(utf8_name);
return ret;
}
{
krb5_error_code ret;
char *utf8_name;
+ size_t converted_size;
*principal = NULL;
- if (push_utf8_allocate(&utf8_name, name) == (size_t)-1) {
+ if (!push_utf8_talloc(talloc_tos(), &utf8_name, name, &converted_size)) {
return ENOMEM;
}
ret = krb5_parse_name_norealm(context, utf8_name, principal);
- SAFE_FREE(utf8_name);
+ TALLOC_FREE(utf8_name);
return ret;
}
#endif
/**************************************************************
krb5_parse_name that returns a UNIX charset name. Must
- be freed with normal free() call.
+ be freed with talloc_free() call.
**************************************************************/
- krb5_error_code smb_krb5_unparse_name(krb5_context context,
- krb5_const_principal principal,
- char **unix_name)
+krb5_error_code smb_krb5_unparse_name(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_const_principal principal,
+ char **unix_name)
{
krb5_error_code ret;
char *utf8_name;
+ size_t converted_size;
*unix_name = NULL;
ret = krb5_unparse_name(context, principal, &utf8_name);
return ret;
}
- if (pull_utf8_allocate(unix_name, utf8_name)==-1) {
+ if (!pull_utf8_talloc(mem_ctx, unix_name, utf8_name, &converted_size)) {
krb5_free_unparsed_name(context, utf8_name);
return ENOMEM;
}
#endif
#if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
- int create_kerberos_key_from_string_direct(krb5_context context,
- krb5_principal host_princ,
- krb5_data *password,
- krb5_keyblock *key,
- krb5_enctype enctype)
+static int create_kerberos_key_from_string_direct(krb5_context context,
+ krb5_principal host_princ,
+ krb5_data *password,
+ krb5_keyblock *key,
+ krb5_enctype enctype)
{
- int ret;
+ int ret = 0;
krb5_data salt;
krb5_encrypt_block eblock;
krb5_use_enctype(context, &eblock, enctype);
ret = krb5_string_to_key(context, &eblock, key, password, &salt);
SAFE_FREE(salt.data);
+
return ret;
}
#elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
- int create_kerberos_key_from_string_direct(krb5_context context,
- krb5_principal host_princ,
- krb5_data *password,
- krb5_keyblock *key,
- krb5_enctype enctype)
+static int create_kerberos_key_from_string_direct(krb5_context context,
+ krb5_principal host_princ,
+ krb5_data *password,
+ krb5_keyblock *key,
+ krb5_enctype enctype)
{
int ret;
krb5_salt salt;
DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
return ret;
}
-
+
ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
krb5_free_salt(context, salt);
+
return ret;
}
#else
krb5_principal host_princ,
krb5_data *password,
krb5_keyblock *key,
- krb5_enctype enctype)
+ krb5_enctype enctype,
+ bool no_salt)
{
krb5_principal salt_princ = NULL;
int ret;
* principal/enctype in a non-obvious way. If it is, try to match
* its behavior.
*/
+ if (no_salt) {
+ KRB5_KEY_DATA(key) = (KRB5_KEY_DATA_CAST *)SMB_MALLOC(password->length);
+ if (!KRB5_KEY_DATA(key)) {
+ return ENOMEM;
+ }
+ memcpy(KRB5_KEY_DATA(key), password->data, password->length);
+ KRB5_KEY_LENGTH(key) = password->length;
+ KRB5_KEY_TYPE(key) = enctype;
+ return 0;
+ }
salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
if (salt_princ) {
DATA_BLOB *edata_out)
{
DATA_BLOB edata_contents;
- ASN1_DATA data;
+ ASN1_DATA *data;
int edata_type;
if (!edata->length) {
return False;
}
- asn1_load(&data, *edata);
- asn1_start_tag(&data, ASN1_SEQUENCE(0));
- asn1_start_tag(&data, ASN1_CONTEXT(1));
- asn1_read_Integer(&data, &edata_type);
+ data = asn1_init(mem_ctx);
+ if (data == NULL) {
+ return false;
+ }
+
+ asn1_load(data, *edata);
+ asn1_start_tag(data, ASN1_SEQUENCE(0));
+ asn1_start_tag(data, ASN1_CONTEXT(1));
+ asn1_read_Integer(data, &edata_type);
if (edata_type != KRB5_PADATA_PW_SALT) {
DEBUG(0,("edata is not of required type %d but of type %d\n",
KRB5_PADATA_PW_SALT, edata_type));
- asn1_free(&data);
+ asn1_free(data);
return False;
}
- asn1_start_tag(&data, ASN1_CONTEXT(2));
- asn1_read_OctetString(&data, &edata_contents);
- asn1_end_tag(&data);
- asn1_end_tag(&data);
- asn1_end_tag(&data);
- asn1_free(&data);
+ asn1_start_tag(data, ASN1_CONTEXT(2));
+ asn1_read_OctetString(data, talloc_autofree_context(), &edata_contents);
+ asn1_end_tag(data);
+ asn1_end_tag(data);
+ asn1_end_tag(data);
+ asn1_free(data);
*edata_out = data_blob_talloc(mem_ctx, edata_contents.data, edata_contents.length);
bool unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
{
DATA_BLOB pac_contents;
- ASN1_DATA data;
+ ASN1_DATA *data;
int data_type;
if (!auth_data->length) {
return False;
}
- asn1_load(&data, *auth_data);
- asn1_start_tag(&data, ASN1_SEQUENCE(0));
- asn1_start_tag(&data, ASN1_SEQUENCE(0));
- asn1_start_tag(&data, ASN1_CONTEXT(0));
- asn1_read_Integer(&data, &data_type);
+ data = asn1_init(mem_ctx);
+ if (data == NULL) {
+ return false;
+ }
+
+ asn1_load(data, *auth_data);
+ asn1_start_tag(data, ASN1_SEQUENCE(0));
+ asn1_start_tag(data, ASN1_SEQUENCE(0));
+ asn1_start_tag(data, ASN1_CONTEXT(0));
+ asn1_read_Integer(data, &data_type);
if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
- asn1_free(&data);
+ asn1_free(data);
return False;
}
- asn1_end_tag(&data);
- asn1_start_tag(&data, ASN1_CONTEXT(1));
- asn1_read_OctetString(&data, &pac_contents);
- asn1_end_tag(&data);
- asn1_end_tag(&data);
- asn1_end_tag(&data);
- asn1_free(&data);
+ asn1_end_tag(data);
+ asn1_start_tag(data, ASN1_CONTEXT(1));
+ asn1_read_OctetString(data, talloc_autofree_context(), &pac_contents);
+ asn1_end_tag(data);
+ asn1_end_tag(data);
+ asn1_end_tag(data);
+ asn1_free(data);
*unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
/* check if it is a PAC */
got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
data_blob_free(&auth_data_wrapped);
-
- if (!got_auth_data_pac) {
- continue;
+
+ if (got_auth_data_pac) {
+ return true;
}
}
/* check if it is a PAC */
got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
data_blob_free(&auth_data_wrapped);
-
- if (!got_auth_data_pac) {
- continue;
+
+ if (got_auth_data_pac) {
+ return true;
}
}
DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
cc_type, krb5_cc_get_name(context, ccache),
- http_timestring(credsp->times.endtime)));
+ http_timestring(talloc_tos(), credsp->times.endtime)));
/* we will probably need new tickets if the current ones
will expire within 10 seconds.
bool creds_ready = False;
int i = 0, maxtries = 3;
+ ZERO_STRUCT(in_data);
+
retval = smb_krb5_parse_name(context, principal, &server);
if (retval) {
DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
- http_timestring((unsigned)credsp->times.endtime),
+ http_timestring(talloc_tos(), (unsigned)credsp->times.endtime),
(unsigned)credsp->times.endtime));
if (expire_time) {
*expire_time = (time_t)credsp->times.endtime;
}
- in_data.length = 0;
+#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_FWD_TGT_CREDS) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY)
+ if( credsp->ticket_flags & TKT_FLG_OK_AS_DELEGATE ) {
+ /* Fetch a forwarded TGT from the KDC so that we can hand off a 2nd ticket
+ as part of the kerberos exchange. */
+
+ DEBUG( 3, ("ads_krb5_mk_req: server marked as OK to delegate to, building forwardable TGT\n") );
+
+ if( *auth_context == NULL ) {
+ /* Allocate if it has not yet been allocated. */
+ retval = krb5_auth_con_init( context, auth_context );
+ if (retval) {
+ DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_init failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_creds;
+ }
+ }
+
+ retval = krb5_auth_con_setuseruserkey( context, *auth_context, &credsp->keyblock );
+ if (retval) {
+ DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_setuseruserkey failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_creds;
+ }
+
+ /* Must use a subkey for forwarded tickets. */
+ retval = krb5_auth_con_setflags( context, *auth_context, KRB5_AUTH_CONTEXT_USE_SUBKEY);
+ if (retval) {
+ DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_setflags failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_creds;
+ }
+
+ retval = ads_krb5_get_fwd_ticket( context,
+ auth_context,
+ credsp,
+ ccache,
+ &in_data );
+ if (retval) {
+ DEBUG( 3, ("ads_krb5_get_fwd_ticket failed (%s)\n",
+ error_message( retval ) ) );
+
+ /*
+ * This is not fatal. Delete the *auth_context and continue
+ * with krb5_mk_req_extended to get a non-forwardable ticket.
+ */
+
+ if (in_data.data) {
+ free( in_data.data );
+ in_data.data = NULL;
+ in_data.length = 0;
+ }
+ krb5_auth_con_free(context, *auth_context);
+ *auth_context = NULL;
+ }
+ }
+#endif
+
retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
&in_data, credsp, outbuf);
if (retval) {
DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
error_message(retval)));
}
-
+
+ if (in_data.data) {
+ free( in_data.data );
+ in_data.length = 0;
+ }
+
krb5_free_creds(context, credsp);
cleanup_creds:
bool get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, bool remote)
{
- krb5_keyblock *skey;
- krb5_error_code err;
- bool ret = False;
+ krb5_keyblock *skey = NULL;
+ krb5_error_code err = 0;
+ bool ret = false;
- if (remote)
+ if (remote) {
err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
- else
+ } else {
err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
- if (err == 0 && skey != NULL) {
- DEBUG(10, ("Got KRB5 session key of length %d\n", (int)KRB5_KEY_LENGTH(skey)));
- *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
- dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
+ }
- ret = True;
+ if (err || skey == NULL) {
+ DEBUG(10, ("KRB5 error getting session key %d\n", err));
+ goto done;
+ }
+
+ DEBUG(10, ("Got KRB5 session key of length %d\n", (int)KRB5_KEY_LENGTH(skey)));
+ *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
+ dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
+
+ ret = true;
+ done:
+ if (skey) {
krb5_free_keyblock(context, skey);
- } else {
- DEBUG(10, ("KRB5 error getting session key %d\n", err));
}
return ret;
krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
{
-#if defined(HAVE_KRB5_KT_FREE_ENTRY)
- return krb5_kt_free_entry(context, kt_entry);
-#elif defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
+/* Try krb5_free_keytab_entry_contents first, since
+ * MIT Kerberos >= 1.7 has both krb5_free_keytab_entry_contents and
+ * krb5_kt_free_entry but only has a prototype for the first, while the
+ * second is considered private.
+ */
+#if defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
return krb5_free_keytab_entry_contents(context, kt_entry);
+#elif defined(HAVE_KRB5_KT_FREE_ENTRY)
+ return krb5_kt_free_entry(context, kt_entry);
#else
#error UNKNOWN_KT_FREE_FUNCTION
#endif
}
- void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
- PAC_SIGNATURE_DATA *sig)
+ void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
+ struct PAC_SIGNATURE_DATA *sig)
{
#ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
cksum->cksumtype = (krb5_cksumtype)sig->type;
- cksum->checksum.length = sig->signature.buf_len;
- cksum->checksum.data = sig->signature.buffer;
+ cksum->checksum.length = sig->signature.length;
+ cksum->checksum.data = sig->signature.data;
#else
cksum->checksum_type = (krb5_cksumtype)sig->type;
- cksum->length = sig->signature.buf_len;
- cksum->contents = sig->signature.buffer;
+ cksum->length = sig->signature.length;
+ cksum->contents = sig->signature.data;
#endif
}
krb5_error_code smb_krb5_verify_checksum(krb5_context context,
- krb5_keyblock *keyblock,
+ const krb5_keyblock *keyblock,
krb5_keyusage usage,
krb5_checksum *cksum,
uint8 *data,
krb5_error_code ret;
krb5_keytab keytab;
char *name = NULL;
+ krb5_keyblock *keyp;
/* We have to open a new keytab handle here, as MIT does
an implicit open/getnext/close on krb5_kt_get_entry. We
}
if ( DEBUGLEVEL >= 10 ) {
- if (smb_krb5_unparse_name(context, server, &name) == 0) {
+ if (smb_krb5_unparse_name(talloc_tos(), context, server, &name) == 0) {
DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
kvno, enctype, name));
- SAFE_FREE(name);
+ TALLOC_FREE(name);
}
}
goto out;
}
-#ifdef HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK /* Heimdal */
- ret = krb5_copy_keyblock(context, &entry.keyblock, out_key);
-#elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEY) /* MIT */
- ret = krb5_copy_keyblock(context, &entry.key, out_key);
-#else
-#error UNKNOWN_KRB5_KEYTAB_ENTRY_FORMAT
-#endif
+ keyp = KRB5_KT_KEY(&entry);
+ ret = krb5_copy_keyblock(context, keyp, out_key);
if (ret) {
DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
goto out;
addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
if (addrs == NULL) {
- SAFE_FREE(kerb_addr);
+ SAFE_FREE(*kerb_addr);
return ENOMEM;
}
addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
if (addrs[0] == NULL) {
SAFE_FREE(addrs);
- SAFE_FREE(kerb_addr);
+ SAFE_FREE(*kerb_addr);
return ENOMEM;
}
if (addrs[0]->contents == NULL) {
SAFE_FREE(addrs[0]);
SAFE_FREE(addrs);
- SAFE_FREE(kerb_addr);
+ SAFE_FREE(*kerb_addr);
return ENOMEM;
}
{
addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
if (addrs == NULL) {
- SAFE_FREE(kerb_addr);
+ SAFE_FREE(*kerb_addr);
return ENOMEM;
}
if (addrs->val[0].address.data == NULL) {
SAFE_FREE(addrs->val);
SAFE_FREE(addrs);
- SAFE_FREE(kerb_addr);
+ SAFE_FREE(*kerb_addr);
return ENOMEM;
}
#endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
}
- krb5_enctype smb_get_enctype_from_kt_entry(const krb5_keytab_entry *kt_entry)
+ krb5_enctype smb_get_enctype_from_kt_entry(krb5_keytab_entry *kt_entry)
{
-#ifdef HAVE_KRB5_KEYTAB_ENTRY_KEY /* MIT */
- return kt_entry->key.enctype;
-#elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK) /* Heimdal */
- return kt_entry->keyblock.keytype;
-#else
-#error UNKNOWN_KRB5_KEYTAB_ENTRY_KEYBLOCK_FORMAT
-#endif
+ return KRB5_KEY_TYPE(KRB5_KT_KEY(kt_entry));
}
krb5_error_code ret = 0;
TALLOC_CTX *mem_ctx;
char keytab_string[MAX_KEYTAB_NAME_LEN];
+ char *kt_str = NULL;
bool found_valid_name = False;
const char *pragma = "FILE";
const char *tmp = NULL;
ret = ENOMEM;
goto out;
}
-
+
if (strncmp(tmp, "ANY:", 4) == 0) {
tmp += 4;
}
memset(&keytab_string, '\0', sizeof(keytab_string));
- while (next_token(&tmp, keytab_string, ",", sizeof(keytab_string))) {
-
- if (strncmp(keytab_string, "WRFILE:", 7) == 0) {
+ while (next_token_talloc(mem_ctx, &tmp, &kt_str, ",")) {
+ if (strncmp(kt_str, "WRFILE:", 7) == 0) {
found_valid_name = True;
- tmp = keytab_string;
+ tmp = kt_str;
tmp += 7;
}
- if (strncmp(keytab_string, "FILE:", 5) == 0) {
+ if (strncmp(kt_str, "FILE:", 5) == 0) {
found_valid_name = True;
- tmp = keytab_string;
+ tmp = kt_str;
tmp += 5;
}
- if (found_valid_name) {
+ if (tmp[0] == '/') {
+ /* Treat as a FILE: keytab definition. */
+ found_valid_name = true;
+ }
+ if (found_valid_name) {
if (tmp[0] != '/') {
ret = KRB5_KT_BADNAME;
goto out;
break;
}
}
-
+
if (!found_valid_name) {
ret = KRB5_KT_UNKNOWN_TYPE;
goto out;
return ret;
}
+krb5_error_code smb_krb5_keytab_name(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_keytab keytab,
+ const char **keytab_name)
+{
+ char keytab_string[MAX_KEYTAB_NAME_LEN];
+ krb5_error_code ret = 0;
+
+ ret = krb5_kt_get_name(context, keytab,
+ keytab_string, MAX_KEYTAB_NAME_LEN - 2);
+ if (ret) {
+ return ret;
+ }
+
+ *keytab_name = talloc_strdup(mem_ctx, keytab_string);
+ if (!*keytab_name) {
+ return ENOMEM;
+ }
+
+ return ret;
+}
+
+#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_FWD_TGT_CREDS) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY)
+/**************************************************************
+Routine: ads_krb5_get_fwd_ticket
+ Description:
+ When a service ticket is flagged as trusted
+ for delegation we should provide a forwardable
+ ticket so that the remote host can act on our
+ behalf. This is done by taking the 2nd forwardable
+ TGT and storing it in the GSS-API authenticator
+ "checksum". This routine will populate
+ the krb5_data authenticator with this TGT.
+ Parameters:
+ krb5_context context: The kerberos context for this authentication.
+ krb5_auth_context: The authentication context.
+ krb5_creds *credsp: The ticket credentials (AS-REP).
+ krb5_ccache ccache: The credentials cache.
+ krb5_data &authenticator: The checksum field that will store the TGT, and
+ authenticator.data must be freed by the caller.
+
+ Returns:
+ krb5_error_code: 0 if no errors, otherwise set.
+**************************************************************/
+
+static krb5_error_code ads_krb5_get_fwd_ticket( krb5_context context,
+ krb5_auth_context *auth_context,
+ krb5_creds *credsp,
+ krb5_ccache ccache,
+ krb5_data *authenticator)
+{
+ krb5_data fwdData;
+ krb5_error_code retval = 0;
+ char *pChksum = NULL;
+ char *p = NULL;
+
+/* MIT krb5 1.7beta3 (in Ubuntu Karmic) is missing the prototype,
+ but still has the symbol */
+#if !HAVE_DECL_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE
+krb5_error_code krb5_auth_con_set_req_cksumtype(
+ krb5_context context,
+ krb5_auth_context auth_context,
+ krb5_cksumtype cksumtype);
+#endif
+
+ ZERO_STRUCT(fwdData);
+ ZERO_STRUCTP(authenticator);
+
+ retval = krb5_fwd_tgt_creds(context,/* Krb5 context [in] */
+ *auth_context, /* Authentication context [in] */
+ CONST_DISCARD(char *, KRB5_TGS_NAME), /* Ticket service name ("krbtgt") [in] */
+ credsp->client, /* Client principal for the tgt [in] */
+ credsp->server, /* Server principal for the tgt [in] */
+ ccache, /* Credential cache to use for storage [in] */
+ 1, /* Turn on for "Forwardable ticket" [in] */
+ &fwdData ); /* Resulting response [out] */
+
+
+ if (retval) {
+ DEBUG(1,("ads_krb5_get_fwd_ticket: krb5_fwd_tgt_creds failed (%s)\n",
+ error_message(retval)));
+ goto out;
+ }
+
+ if ((unsigned int)GSSAPI_CHECKSUM_SIZE + (unsigned int)fwdData.length <
+ (unsigned int)GSSAPI_CHECKSUM_SIZE) {
+ retval = EINVAL;
+ goto out;
+ }
+
+ /* We're going to allocate a gssChecksum structure with a little
+ extra data the length of the kerberos credentials length
+ (APPLICATION 22) so that we can pack it on the end of the structure.
+ */
+
+ pChksum = (char *)SMB_MALLOC(GSSAPI_CHECKSUM_SIZE + fwdData.length );
+ if (!pChksum) {
+ retval = ENOMEM;
+ goto out;
+ }
+
+ p = pChksum;
+
+ SIVAL(p, 0, GSSAPI_BNDLENGTH);
+ p += 4;
+
+ /* Zero out the bindings fields */
+ memset(p, '\0', GSSAPI_BNDLENGTH );
+ p += GSSAPI_BNDLENGTH;
+
+ SIVAL(p, 0, GSS_C_DELEG_FLAG );
+ p += 4;
+ SSVAL(p, 0, 1 );
+ p += 2;
+ SSVAL(p, 0, fwdData.length );
+ p += 2;
+
+ /* Migrate the kerberos KRB_CRED data to the checksum delegation */
+ memcpy(p, fwdData.data, fwdData.length );
+ p += fwdData.length;
+
+ /* We need to do this in order to allow our GSS-API */
+ retval = krb5_auth_con_set_req_cksumtype( context, *auth_context, GSSAPI_CHECKSUM );
+ if (retval) {
+ goto out;
+ }
+
+ /* We now have a service ticket, now turn it into an AP-REQ. */
+ authenticator->length = fwdData.length + GSSAPI_CHECKSUM_SIZE;
+
+ /* Caller should call free() when they're done with this. */
+ authenticator->data = (char *)pChksum;
+
+ out:
+
+ /* Remove that input data, we never needed it anyway. */
+ if (fwdData.length > 0) {
+ krb5_free_data_contents( context, &fwdData );
+ }
+
+ return retval;
+}
+#endif
+
+#if defined(HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE) && \
+ defined(HAVE_KRB5_GET_CREDS_OPT_ALLOC) && \
+ defined(HAVE_KRB5_GET_CREDS)
+static krb5_error_code smb_krb5_get_credentials_for_user_opt(krb5_context context,
+ krb5_ccache ccache,
+ krb5_principal me,
+ krb5_principal server,
+ krb5_principal impersonate_princ,
+ krb5_creds **out_creds)
+{
+ krb5_error_code ret;
+ krb5_get_creds_opt opt;
+
+ ret = krb5_get_creds_opt_alloc(context, &opt);
+ if (ret) {
+ goto done;
+ }
+ krb5_get_creds_opt_add_options(context, opt, KRB5_GC_FORWARDABLE);
+
+ if (impersonate_princ) {
+ ret = krb5_get_creds_opt_set_impersonate(context, opt,
+ impersonate_princ);
+ if (ret) {
+ goto done;
+ }
+ }
+
+ ret = krb5_get_creds(context, opt, ccache, server, out_creds);
+ if (ret) {
+ goto done;
+ }
+
+ done:
+ if (opt) {
+ krb5_get_creds_opt_free(context, opt);
+ }
+ return ret;
+}
+#endif /* HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE */
+
+#ifdef HAVE_KRB5_GET_CREDENTIALS_FOR_USER
+static krb5_error_code smb_krb5_get_credentials_for_user(krb5_context context,
+ krb5_ccache ccache,
+ krb5_principal me,
+ krb5_principal server,
+ krb5_principal impersonate_princ,
+ krb5_creds **out_creds)
+{
+ krb5_error_code ret;
+ krb5_creds in_creds;
+
+#if !HAVE_DECL_KRB5_GET_CREDENTIALS_FOR_USER
+krb5_error_code KRB5_CALLCONV
+krb5_get_credentials_for_user(krb5_context context, krb5_flags options,
+ krb5_ccache ccache, krb5_creds *in_creds,
+ krb5_data *subject_cert,
+ krb5_creds **out_creds);
+#endif /* !HAVE_DECL_KRB5_GET_CREDENTIALS_FOR_USER */
+
+ ZERO_STRUCT(in_creds);
+
+ if (impersonate_princ) {
+
+ in_creds.server = me;
+ in_creds.client = impersonate_princ;
+
+ ret = krb5_get_credentials_for_user(context,
+ 0, /* krb5_flags options */
+ ccache,
+ &in_creds,
+ NULL, /* krb5_data *subject_cert */
+ out_creds);
+ } else {
+ in_creds.client = me;
+ in_creds.server = server;
+
+ ret = krb5_get_credentials(context, 0, ccache,
+ &in_creds, out_creds);
+ }
+
+ return ret;
+}
+#endif /* HAVE_KRB5_GET_CREDENTIALS_FOR_USER */
+
+/*
+ * smb_krb5_get_credentials
+ *
+ * @brief Get krb5 credentials for a server
+ *
+ * @param[in] context An initialized krb5_context
+ * @param[in] ccache An initialized krb5_ccache
+ * @param[in] me The krb5_principal of the caller
+ * @param[in] server The krb5_principal of the requested service
+ * @param[in] impersonate_princ The krb5_principal of a user to impersonate as (optional)
+ * @param[out] out_creds The returned krb5_creds structure
+ * @return krb5_error_code
+ *
+ */
+krb5_error_code smb_krb5_get_credentials(krb5_context context,
+ krb5_ccache ccache,
+ krb5_principal me,
+ krb5_principal server,
+ krb5_principal impersonate_princ,
+ krb5_creds **out_creds)
+{
+ krb5_error_code ret;
+ krb5_creds *creds = NULL;
+
+ *out_creds = NULL;
+
+ if (impersonate_princ) {
+#ifdef HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE /* Heimdal */
+ ret = smb_krb5_get_credentials_for_user_opt(context, ccache, me, server, impersonate_princ, &creds);
+#elif defined(HAVE_KRB5_GET_CREDENTIALS_FOR_USER) /* MIT */
+ ret = smb_krb5_get_credentials_for_user(context, ccache, me, server, impersonate_princ, &creds);
+#else
+ ret = ENOTSUP;
+#endif
+ } else {
+ krb5_creds in_creds;
+
+ ZERO_STRUCT(in_creds);
+
+ in_creds.client = me;
+ in_creds.server = server;
+
+ ret = krb5_get_credentials(context, 0, ccache,
+ &in_creds, &creds);
+ }
+ if (ret) {
+ goto done;
+ }
+
+ ret = krb5_cc_store_cred(context, ccache, creds);
+ if (ret) {
+ goto done;
+ }
+
+ if (out_creds) {
+ *out_creds = creds;
+ }
+
+ done:
+ if (creds && ret) {
+ krb5_free_creds(context, creds);
+ }
+
+ return ret;
+}
+
+/*
+ * smb_krb5_get_creds
+ *
+ * @brief Get krb5 credentials for a server
+ *
+ * @param[in] server_s The string name of the service
+ * @param[in] time_offset The offset to the KDCs time in seconds (optional)
+ * @param[in] cc The krb5 credential cache string name (optional)
+ * @param[in] impersonate_princ_s The string principal name to impersonate (optional)
+ * @param[out] creds_p The returned krb5_creds structure
+ * @return krb5_error_code
+ *
+ */
+krb5_error_code smb_krb5_get_creds(const char *server_s,
+ time_t time_offset,
+ const char *cc,
+ const char *impersonate_princ_s,
+ krb5_creds **creds_p)
+{
+ krb5_error_code ret;
+ krb5_context context = NULL;
+ krb5_principal me = NULL;
+ krb5_principal server = NULL;
+ krb5_principal impersonate_princ = NULL;
+ krb5_creds *creds = NULL;
+ krb5_ccache ccache = NULL;
+
+ *creds_p = NULL;
+
+ initialize_krb5_error_table();
+ ret = krb5_init_context(&context);
+ if (ret) {
+ goto done;
+ }
+
+ if (time_offset != 0) {
+ krb5_set_real_time(context, time(NULL) + time_offset, 0);
+ }
+
+ ret = krb5_cc_resolve(context, cc ? cc :
+ krb5_cc_default_name(context), &ccache);
+ if (ret) {
+ goto done;
+ }
+
+ ret = krb5_cc_get_principal(context, ccache, &me);
+ if (ret) {
+ goto done;
+ }
+
+ ret = smb_krb5_parse_name(context, server_s, &server);
+ if (ret) {
+ goto done;
+ }
+
+ if (impersonate_princ_s) {
+ ret = smb_krb5_parse_name(context, impersonate_princ_s,
+ &impersonate_princ);
+ if (ret) {
+ goto done;
+ }
+ }
+
+ ret = smb_krb5_get_credentials(context, ccache,
+ me, server, impersonate_princ,
+ &creds);
+ if (ret) {
+ goto done;
+ }
+
+ ret = krb5_cc_store_cred(context, ccache, creds);
+ if (ret) {
+ goto done;
+ }
+
+ if (creds_p) {
+ *creds_p = creds;
+ }
+
+ DEBUG(1,("smb_krb5_get_creds: got ticket for %s\n",
+ server_s));
+
+ if (impersonate_princ_s) {
+ char *client = NULL;
+
+ ret = smb_krb5_unparse_name(talloc_tos(), context, creds->client, &client);
+ if (ret) {
+ goto done;
+ }
+ DEBUGADD(1,("smb_krb5_get_creds: using S4U2SELF impersonation as %s\n",
+ client));
+ TALLOC_FREE(client);
+ }
+
+ done:
+ if (!context) {
+ return ret;
+ }
+
+ if (creds && ret) {
+ krb5_free_creds(context, creds);
+ }
+ if (server) {
+ krb5_free_principal(context, server);
+ }
+ if (me) {
+ krb5_free_principal(context, me);
+ }
+ if (impersonate_princ) {
+ krb5_free_principal(context, impersonate_princ);
+ }
+ if (ccache) {
+ krb5_cc_close(context, ccache);
+ }
+ krb5_free_context(context);
+
+ return ret;
+}
+
#else /* HAVE_KRB5 */
/* this saves a few linking headaches */
int cli_krb5_get_ticket(const char *principal, time_t time_offset,
git.samba.org / ira / wip.git / blobdiff