#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_allocate(&utf8_name, name, &converted_size)) {
return ENOMEM;
}
{
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_allocate(&utf8_name, name, &converted_size)) {
return ENOMEM;
}
{
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_allocate(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) {
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));
*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:
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
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;
#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));
}
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;
+
+ 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
+
#else /* HAVE_KRB5 */
/* this saves a few linking headaches */
int cli_krb5_get_ticket(const char *principal, time_t time_offset,
git.samba.org / kai / samba.git / blobdiff