Introduce system MIT krb5 build with --with-system-mitkrb5 option.

System MIT krb5 build also enabled by specifying --without-ad-dc

When --with-system-mitkrb5 (or --withou-ad-dc) option is passed to top level
configure in WAF build we are trying to detect and use system-wide MIT krb5
libraries. As result, Samba 4 DC functionality will be disabled due to the fact
that it is currently impossible to implement embedded KDC server with MIT krb5.

Thus, --with-system-mitkrb5/--without-ad-dc build will only produce
  * Samba 4 client libraries and their Python bindings
  * Samba 3 server (smbd, nmbd, winbindd from source3/)
  * Samba 3 client libraries

In addition, Samba 4 DC server-specific tests will not be compiled into smbtorture.
This in particular affects spoolss_win, spoolss_notify, and remote_pac rpc tests.

1 files changed, 224 insertions, 0 deletions

diff --git a/wscript_configure_system_mitkrb5 b/wscript_configure_system_mitkrb5
new file mode 100644
index 0000000000..7523103556
--- /dev/null
+++ b/wscript_configure_system_mitkrb5
@@ -0,0 +1,224 @@
+import Logs, Options
+
+# Check for kerberos
+have_gssapi=False
+
+def krb5_define_syslib(conf, lib, deps):
+    found = 'FOUND_SYSTEMLIB_' + lib
+    if found in conf.env:
+        return
+    conf.SET_TARGET_TYPE(lib, 'SYSLIB')
+    conf.SET_SYSLIB_DEPS(lib, deps)
+    conf.env[found] = True
+
+Logs.info("Looking for kerberos features")
+conf.find_program('krb5-config.heimdal', var='HEIMDAL_KRB5_CONFIG')
+conf.find_program('krb5-config', var='KRB5_CONFIG')
+if conf.env.KRB5_CONFIG:
+    conf.check_cfg(path="krb5-config", args="--cflags --libs",
+               package="", uselib_store="KRB5")
+    krb5_define_syslib(conf, "krb5", conf.env['LIB_KRB5'])
+    for lib in conf.env['LIB_KRB5']:
+        krb5_define_syslib(conf, lib, lib)
+
+    conf.check_cfg(path="krb5-config", args="--cflags --libs",
+               package="gssapi", uselib_store="GSSAPI")
+    krb5_define_syslib(conf, "gssapi", conf.env['LIB_GSSAPI'])
+
+    vendor = conf.cmd_and_log("%(path)s --vendor" % dict(path=conf.env.KRB5_CONFIG), dict())
+    conf.env.KRB5_VENDOR = vendor.strip().lower()
+    if conf.env.KRB5_VENDOR != 'heimdal':
+        conf.define('USING_SYSTEM_KRB5', 1)
+        del conf.env.HEIMDAL_KRB5_CONFIG
+
+conf.check_cfg(args="--cflags --libs", package="com_err", uselib_store="com_err")
+conf.CHECK_FUNCS_IN('_et_list', 'com_err')
+conf.CHECK_HEADERS('com_err.h', lib='com_err')
+
+conf.CHECK_HEADERS('krb5.h krb5/locate_plugin.h', lib='krb5')
+conf.CHECK_HEADERS('gssapi.h gssapi/gssapi_generic.h gssapi/gssapi.h gssapi/gssapi_ext.h gssapi/gssapi_krb5.h', lib='gssapi')
+
+conf.CHECK_FUNCS_IN('krb5_encrypt_data', 'k5crypto')
+conf.CHECK_FUNCS_IN('des_set_key','crypto')
+conf.CHECK_FUNCS_IN('copy_Authenticator', 'asn1')
+conf.CHECK_FUNCS_IN('roken_getaddrinfo_hostspec', 'roken')
+if conf.CHECK_FUNCS_IN('gss_display_status', 'gssapi') or \
+   conf.CHECK_FUNCS_IN('gss_display_status', 'gssapi_krb5'):
+    have_gssapi=True
+conf.CHECK_FUNCS_IN('''
+       gss_wrap_iov
+       gss_krb5_import_cred
+       gss_get_name_attribute
+       gss_mech_krb5
+       gss_oid_equal
+       gss_inquire_sec_context_by_oid
+       gsskrb5_extract_authz_data_from_sec_context
+       gss_krb5_export_lucid_sec_context
+       gss_import_cred gss_export_cred
+       ''', 'gssapi gssapi_krb5 krb5')
+conf.CHECK_FUNCS_IN('krb5_mk_req_extended krb5_kt_compare', 'krb5')
+conf.CHECK_FUNCS('''
+       krb5_set_default_in_tkt_etypes krb5_set_default_tgs_enctypes
+       krb5_set_default_tgs_ktypes krb5_principal2salt
+       krb5_c_string_to_key krb5_get_pw_salt krb5_string_to_key_salt krb5_auth_con_setkey
+       krb5_auth_con_setuseruserkey krb5_get_permitted_enctypes
+       krb5_get_default_in_tkt_etypes krb5_free_data_contents
+       krb5_principal_get_comp_string krb5_free_unparsed_name
+       krb5_free_keytab_entry_contents krb5_kt_free_entry krb5_krbhst_init
+       krb5_krbhst_get_addrinfo
+       krb5_crypto_init krb5_crypto_destroy
+       krb5_c_verify_checksum krb5_principal_compare_any_realm
+       krb5_parse_name_norealm krb5_princ_size krb5_get_init_creds_opt_set_pac_request
+       krb5_get_renewed_creds krb5_free_error_contents
+       initialize_krb5_error_table krb5_get_init_creds_opt_alloc
+       krb5_get_init_creds_opt_free krb5_get_init_creds_opt_get_error
+       krb5_enctype_to_string krb5_fwd_tgt_creds krb5_auth_con_set_req_cksumtype
+       krb5_get_creds_opt_alloc krb5_get_creds_opt_set_impersonate krb5_get_creds
+       krb5_get_credentials_for_user krb5_get_host_realm krb5_free_host_realm
+       krb5_get_init_creds_keyblock krb5_get_init_creds_keytab
+       krb5_make_principal krb5_build_principal_alloc_va
+       krb5_cc_get_lifetime krb5_cc_retrieve_cred
+       krb5_free_checksum_contents krb5_c_make_checksum''',
+     lib='krb5 k5crypto')
+conf.CHECK_DECLS('''krb5_get_credentials_for_user
+                    krb5_auth_con_set_req_cksumtype''',
+                    headers='krb5.h', always=True)
+conf.CHECK_VARIABLE('AP_OPTS_USE_SUBKEY', headers='krb5.h')
+conf.CHECK_VARIABLE('KV5M_KEYTAB', headers='krb5.h')
+conf.CHECK_VARIABLE('KRB5_KU_OTHER_CKSUM', headers='krb5.h')
+conf.CHECK_VARIABLE('KRB5_KEYUSAGE_APP_DATA_CKSUM', headers='krb5.h')
+conf.CHECK_VARIABLE('ENCTYPE_AES128_CTS_HMAC_SHA1_96', headers='krb5.h')
+conf.CHECK_VARIABLE('ENCTYPE_AES256_CTS_HMAC_SHA1_96', headers='krb5.h')
+conf.CHECK_DECLS('KRB5_PDU_NONE', reverse=True, headers='krb5.h')
+conf.CHECK_STRUCTURE_MEMBER('krb5_keytab_entry', 'key', headers='krb5.h',
+                            define='HAVE_KRB5_KEYTAB_ENTRY_KEY')
+conf.CHECK_STRUCTURE_MEMBER('krb5_keytab_entry', 'keyblock', headers='krb5.h',
+                            define='HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK')
+conf.CHECK_STRUCTURE_MEMBER('krb5_address', 'magic', headers='krb5.h',
+                            define='HAVE_MAGIC_IN_KRB5_ADDRESS')
+conf.CHECK_STRUCTURE_MEMBER('krb5_address', 'addrtype', headers='krb5.h',
+                            define='HAVE_ADDRTYPE_IN_KRB5_ADDRESS')
+conf.CHECK_STRUCTURE_MEMBER('krb5_ap_req', 'ticket', headers='krb5.h',
+                            define='HAVE_TICKET_POINTER_IN_KRB5_AP_REQ')
+
+conf.CHECK_TYPE('krb5_encrypt_block', headers='krb5.h')
+
+conf.CHECK_CODE('''
+       krb5_context ctx;
+       krb5_get_init_creds_opt *opt = NULL;
+       krb5_get_init_creds_opt_free(ctx, opt);
+       ''',
+    'KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT',
+    headers='krb5.h', link=False,
+    msg="Checking whether krb5_get_init_creds_opt_free takes a context argument")
+conf.CHECK_CODE('''
+       const krb5_data *pkdata;
+       krb5_context context;
+       krb5_principal principal;
+       pkdata = krb5_princ_component(context, principal, 0);
+       ''',
+    'HAVE_KRB5_PRINC_COMPONENT',
+    headers='krb5.h', lib='krb5',
+    msg="Checking whether krb5_princ_component is available")
+
+conf.CHECK_CODE('''
+       int main(void) {
+       char buf[256];
+       krb5_enctype_to_string(1, buf, 256);
+       return 0;
+       }''',
+    'HAVE_KRB5_ENCTYPE_TO_STRING_WITH_SIZE_T_ARG',
+    headers='krb5.h', lib='krb5 k5crypto',
+    addmain=False, cflags='-Werror',
+    msg="Checking whether krb5_enctype_to_string takes size_t argument")
+
+conf.CHECK_CODE('''
+       int main(void) {
+       krb5_context context = NULL;
+       char *str = NULL;
+       krb5_enctype_to_string(context, 1, &str);
+       if (str) free (str);
+       return 0;
+       }''',
+    'HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG',
+    headers='krb5.h stdlib.h', lib='krb5',
+    addmain=False, cflags='-Werror',
+    msg="Checking whether krb5_enctype_to_string takes krb5_context argument")
+conf.CHECK_CODE('''
+       int main(void) {
+       krb5_context ctx = NULL;
+       krb5_principal princ = NULL;
+       const char *str = krb5_princ_realm(ctx, princ)->data;
+       return 0;
+       }''',
+    'HAVE_KRB5_PRINC_REALM',
+    headers='krb5.h', lib='krb5',
+    addmain=False,
+    msg="Checking whether the macro krb5_princ_realm is defined")
+conf.CHECK_CODE('''
+       int main(void) {
+           krb5_context context;
+           krb5_principal principal;
+           const char *realm; realm = krb5_principal_get_realm(context, principal);
+           return 0;
+       }''',
+    'HAVE_KRB5_PRINCIPAL_GET_REALM',
+    headers='krb5.h', lib='krb5',
+    addmain=False,
+    msg="Checking whether krb5_principal_get_realm is defined")
+conf.CHECK_CODE('''
+       krb5_enctype enctype;
+       enctype = ENCTYPE_ARCFOUR_HMAC_MD5;
+       ''',
+    '_HAVE_ENCTYPE_ARCFOUR_HMAC_MD5',
+    headers='krb5.h', lib='krb5',
+    msg="Checking whether the ENCTYPE_ARCFOUR_HMAC_MD5 key type definition is available");
+conf.CHECK_CODE('''
+       krb5_enctype enctype;
+       enctype = ENCTYPE_ARCFOUR_HMAC_MD5_56;
+       ''',
+    '_HAVE_ENCTYPE_ARCFOUR_HMAC_MD5_56',
+    headers='krb5.h', lib='krb5',
+    msg="Checking whether the ENCTYPE_ARCFOUR_HMAC_MD5_56 key type definition is available");
+conf.CHECK_CODE('''
+       krb5_keytype keytype;
+       keytype = KEYTYPE_ARCFOUR_56;
+       ''',
+    '_HAVE_KEYTYPE_ARCFOUR_56',
+    headers='krb5.h', lib='krb5',
+    msg="Checking whether the HAVE_KEYTYPE_ARCFOUR_56 key type definition is available");
+if conf.CONFIG_SET('_HAVE_ENCTYPE_ARCFOUR_HMAC_MD5') and conf.CONFIG_SET('_HAVE_KEYTYPE_ARCFOUR_56'):
+    conf.DEFINE('HAVE_ENCTYPE_ARCFOUR_HMAC_MD5', '1')
+if conf.CONFIG_SET('_HAVE_ENCTYPE_ARCFOUR_HMAC_MD5_56') and conf.CONFIG_SET('_HAVE_KEYTYPE_ARCFOUR_56'):
+    conf.DEFINE('HAVE_ENCTYPE_ARCFOUR_HMAC_MD5_56', '1')
+
+conf.CHECK_CODE('''
+       krb5_enctype enctype;
+       enctype = ENCTYPE_ARCFOUR_HMAC;
+       ''',
+    'HAVE_ENCTYPE_ARCFOUR_HMAC',
+    headers='krb5.h', lib='krb5',
+    msg="Checking whether the ENCTYPE_ARCFOUR_HMAC key type definition is available");
+conf.CHECK_CODE('''
+       krb5_enctype enctype;
+       enctype = ENCTYPE_ARCFOUR_HMAC_EXP;
+       ''',
+    'HAVE_ENCTYPE_ARCFOUR_HMAC_EXP',
+    headers='krb5.h', lib='krb5',
+    msg="Checking whether the ENCTYPE_ARCFOUR_HMAC_EXP key type definition is available");
+
+conf.CHECK_CODE('''
+       krb5_context context;
+       krb5_keytab keytab;
+       krb5_init_context(&context);
+       return krb5_kt_resolve(context, "WRFILE:api", &keytab);
+       ''',
+    'HAVE_WRFILE_KEYTAB',
+    headers='krb5.h', lib='krb5', execute=True,
+    msg="Checking whether the WRFILE:-keytab is supported");
+# Check for KRB5_DEPRECATED handling
+conf.CHECK_CODE('''#define KRB5_DEPRECATED 1
+       #include <krb5.h>''',
+   'HAVE_KRB5_DEPRECATED_WITH_IDENTIFIER', addmain=False,
+    link=False,
+    msg="Checking for KRB5_DEPRECATED define taking an identifier")