diff options
Diffstat (limited to 'third_party/heimdal/lib/gssapi/mech/gss_authorize_localname.c')
| -rw-r--r-- | third_party/heimdal/lib/gssapi/mech/gss_authorize_localname.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/gssapi/mech/gss_authorize_localname.c b/third_party/heimdal/lib/gssapi/mech/gss_authorize_localname.c new file mode 100644 index 00000000000..b72b7bde869 --- /dev/null +++ b/third_party/heimdal/lib/gssapi/mech/gss_authorize_localname.c @@ -0,0 +1,187 @@ +/* + * Copyright (c) 2011, PADL Software Pty Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of PADL Software nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "mech_locl.h" + +gss_buffer_desc GSSAPI_LIB_VARIABLE __gss_c_attr_local_login_user = { + sizeof("local-login-user") - 1, + "local-login-user" +}; + +static OM_uint32 +mech_authorize_localname(OM_uint32 *minor_status, + const struct _gss_name *name, + const struct _gss_name *user) +{ + OM_uint32 major_status = GSS_S_NAME_NOT_MN; + struct _gss_mechanism_name *mn; + + HEIM_TAILQ_FOREACH(mn, &name->gn_mn, gmn_link) { + gssapi_mech_interface m = mn->gmn_mech; + + if (m->gm_authorize_localname == NULL) { + major_status = GSS_S_UNAVAILABLE; + continue; + } + + major_status = m->gm_authorize_localname(minor_status, + mn->gmn_name, + &user->gn_value, + user->gn_type); + if (major_status != GSS_S_UNAUTHORIZED) + break; + } + + return major_status; +} + +/* + * Naming extensions based local login authorization. + */ +static OM_uint32 +attr_authorize_localname(OM_uint32 *minor_status, + const struct _gss_name *name, + const struct _gss_name *user) +{ + OM_uint32 major_status = GSS_S_UNAVAILABLE; + int more = -1; + + if (!gss_oid_equal(user->gn_type, GSS_C_NT_USER_NAME)) + return GSS_S_BAD_NAMETYPE; + + while (more != 0 && major_status != GSS_S_COMPLETE) { + OM_uint32 tmpMajor, tmpMinor; + gss_buffer_desc value; + gss_buffer_desc display_value; + int authenticated = 0, complete = 0; + + tmpMajor = gss_get_name_attribute(minor_status, + (gss_name_t)name, + GSS_C_ATTR_LOCAL_LOGIN_USER, + &authenticated, + &complete, + &value, + &display_value, + &more); + if (GSS_ERROR(tmpMajor)) { + major_status = tmpMajor; + break; + } + + /* If attribute is present, return an authoritative error code. */ + if (authenticated && + value.length == user->gn_value.length && + memcmp(value.value, user->gn_value.value, user->gn_value.length) == 0) + major_status = GSS_S_COMPLETE; + else + major_status = GSS_S_UNAUTHORIZED; + + gss_release_buffer(&tmpMinor, &value); + gss_release_buffer(&tmpMinor, &display_value); + } + + return major_status; +} + +GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL +gss_authorize_localname(OM_uint32 *minor_status, + gss_const_name_t gss_name, + gss_const_name_t gss_user) + +{ + OM_uint32 major_status; + const struct _gss_name *name = (const struct _gss_name *) gss_name; + const struct _gss_name *user = (const struct _gss_name *) gss_user; + int mechAvailable = 0; + + *minor_status = 0; + + if (gss_name == GSS_C_NO_NAME || gss_user == GSS_C_NO_NAME) + return GSS_S_CALL_INACCESSIBLE_READ; + + /* + * We should check that the user name is not a mechanism name, but + * as Heimdal always calls the mechanism's gss_import_name(), it's + * not possible to make this check. + */ +#if 0 + if (HEIM_TAILQ_FIRST(&user->gn_mn) != NULL) + return GSS_S_BAD_NAME; +#endif + + /* If mech returns yes, we return yes */ + major_status = mech_authorize_localname(minor_status, name, user); + if (major_status == GSS_S_COMPLETE) + return GSS_S_COMPLETE; + else if (major_status != GSS_S_UNAVAILABLE) + mechAvailable = 1; + + /* If attribute exists, it is authoritative */ + major_status = attr_authorize_localname(minor_status, name, user); + if (major_status == GSS_S_COMPLETE || major_status == GSS_S_UNAUTHORIZED) + return major_status; + + /* If mechanism did not implement SPI, compare the local name */ + if (mechAvailable == 0) { + int match = 0; + + major_status = gss_compare_name(minor_status, gss_name, + gss_user, &match); + if (major_status == GSS_S_COMPLETE && match == 0) + major_status = GSS_S_UNAUTHORIZED; + } + + return major_status; +} + +GSSAPI_LIB_FUNCTION int GSSAPI_LIB_CALL +gss_userok(gss_const_name_t name, + const char *user) +{ + OM_uint32 major_status, minor_status; + gss_buffer_desc userBuf; + gss_name_t userName; + + userBuf.value = (void *)user; + userBuf.length = strlen(user); + + major_status = gss_import_name(&minor_status, &userBuf, + GSS_C_NT_USER_NAME, &userName); + if (GSS_ERROR(major_status)) + return 0; + + major_status = gss_authorize_localname(&minor_status, name, userName); + + gss_release_name(&minor_status, &userName); + + return (major_status == GSS_S_COMPLETE); +} |