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authorDoug Rabson <dfr@FreeBSD.org>2005-12-29 14:40:22 +0000
committerDoug Rabson <dfr@FreeBSD.org>2005-12-29 14:40:22 +0000
commitc0b9f4fe659b6839541970eb5675e57f4d814969 (patch)
treef226da354a25653f837708c3ecef3468ea981824 /lib/libgssapi/gss_import_name.c
parent66c6b326543894776c17486b5932438e9dd098c9 (diff)
downloadsrc-c0b9f4fe659b6839541970eb5675e57f4d814969.tar.gz
src-c0b9f4fe659b6839541970eb5675e57f4d814969.zip
Add a new extensible GSS-API layer which can support GSS-API plugins,
similar the the Solaris implementation. Repackage the krb5 GSS mechanism as a plugin library for the new implementation. This also includes a comprehensive set of manpages for the GSS-API functions with text mostly taken from the RFC. Reviewed by: Love Hörnquist Åstrand <lha@it.su.se>, ru (build system), des (openssh parts)
Notes
Notes: svn path=/head/; revision=153838
Diffstat (limited to 'lib/libgssapi/gss_import_name.c')
-rw-r--r--lib/libgssapi/gss_import_name.c219
1 files changed, 219 insertions, 0 deletions
diff --git a/lib/libgssapi/gss_import_name.c b/lib/libgssapi/gss_import_name.c
new file mode 100644
index 000000000000..638df2510663
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+++ b/lib/libgssapi/gss_import_name.c
@@ -0,0 +1,219 @@
+/*-
+ * Copyright (c) 2005 Doug Rabson
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <gssapi/gssapi.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include "mech_switch.h"
+#include "utils.h"
+#include "name.h"
+
+static OM_uint32
+_gss_import_export_name(OM_uint32 *minor_status,
+ const gss_buffer_t input_name_buffer,
+ gss_name_t *output_name)
+{
+ OM_uint32 major_status;
+ unsigned char *p = input_name_buffer->value;
+ size_t len = input_name_buffer->length;
+ size_t t;
+ gss_OID_desc mech_oid;
+ struct _gss_mech_switch *m;
+ struct _gss_name *name;
+ struct _gss_mechanism_name *mn;
+ gss_name_t new_canonical_name;
+
+ *minor_status = 0;
+ *output_name = 0;
+
+ /*
+ * Make sure that TOK_ID is {4, 1}.
+ */
+ if (len < 2)
+ return (GSS_S_BAD_NAME);
+ if (p[0] != 4 || p[1] != 1)
+ return (GSS_S_BAD_NAME);
+ p += 2;
+ len -= 2;
+
+ /*
+ * Get the mech length and the name length and sanity
+ * check the size of of the buffer.
+ */
+ if (len < 2)
+ return (GSS_S_BAD_NAME);
+ t = (p[0] << 8) + p[1];
+ p += 2;
+ len -= 2;
+
+ /*
+ * Check the DER encoded OID to make sure it agrees with the
+ * length we just decoded.
+ */
+ if (p[0] != 6) /* 6=OID */
+ return (GSS_S_BAD_NAME);
+ p++;
+ len--;
+ t--;
+ if (p[0] & 0x80) {
+ int digits = p[0];
+ p++;
+ len--;
+ t--;
+ mech_oid.length = 0;
+ while (digits--) {
+ mech_oid.length = (mech_oid.length << 8) | p[0];
+ p++;
+ len--;
+ t--;
+ }
+ } else {
+ mech_oid.length = p[0];
+ p++;
+ len--;
+ t--;
+ }
+ if (mech_oid.length != t)
+ return (GSS_S_BAD_NAME);
+
+ mech_oid.elements = p;
+
+ if (len < t + 4)
+ return (GSS_S_BAD_NAME);
+ p += t;
+ len -= t;
+
+ t = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
+ p += 4;
+ len -= 4;
+
+ if (len != t)
+ return (GSS_S_BAD_NAME);
+
+ m = _gss_find_mech_switch(&mech_oid);
+ if (!m)
+ return (GSS_S_BAD_MECH);
+
+ /*
+ * Ask the mechanism to import the name.
+ */
+ major_status = m->gm_import_name(minor_status,
+ input_name_buffer, GSS_C_NT_EXPORT_NAME, &new_canonical_name);
+
+ /*
+ * Now we make a new name and mark it as an MN.
+ */
+ name = _gss_make_name(m, new_canonical_name);
+ if (!name) {
+ m->gm_release_name(minor_status, &new_canonical_name);
+ return (GSS_S_FAILURE);
+ }
+
+ *output_name = (gss_name_t) name;
+
+ *minor_status = 0;
+ return (GSS_S_COMPLETE);
+}
+
+OM_uint32
+gss_import_name(OM_uint32 *minor_status,
+ const gss_buffer_t input_name_buffer,
+ const gss_OID input_name_type,
+ gss_name_t *output_name)
+{
+ gss_OID name_type = input_name_type;
+ OM_uint32 major_status;
+ struct _gss_name *name;
+
+ if (input_name_buffer->length == 0) {
+ *minor_status = 0;
+ *output_name = 0;
+ return (GSS_S_BAD_NAME);
+ }
+
+ /*
+ * Use GSS_NT_USER_NAME as default name type.
+ */
+ if (name_type == GSS_C_NO_OID)
+ name_type = GSS_C_NT_USER_NAME;
+
+ /*
+ * If this is an exported name, we need to parse it to find
+ * the mechanism and then import it as an MN. See RFC 2743
+ * section 3.2 for a description of the format.
+ */
+ if (_gss_oid_equal(name_type, GSS_C_NT_EXPORT_NAME)) {
+ return _gss_import_export_name(minor_status,
+ input_name_buffer, output_name);
+ }
+
+ /*
+ * Only allow certain name types. This is pretty bogus - we
+ * should figure out the list of supported name types using
+ * gss_inquire_names_for_mech.
+ */
+ if (!_gss_oid_equal(name_type, GSS_C_NT_USER_NAME)
+ && !_gss_oid_equal(name_type, GSS_C_NT_MACHINE_UID_NAME)
+ && !_gss_oid_equal(name_type, GSS_C_NT_STRING_UID_NAME)
+ && !_gss_oid_equal(name_type, GSS_C_NT_HOSTBASED_SERVICE_X)
+ && !_gss_oid_equal(name_type, GSS_C_NT_HOSTBASED_SERVICE)
+ && !_gss_oid_equal(name_type, GSS_C_NT_ANONYMOUS)
+ && !_gss_oid_equal(name_type, GSS_KRB5_NT_PRINCIPAL_NAME)) {
+ *minor_status = 0;
+ *output_name = 0;
+ return (GSS_S_BAD_NAMETYPE);
+ }
+
+ *minor_status = 0;
+ name = malloc(sizeof(struct _gss_name));
+ if (!name) {
+ *minor_status = ENOMEM;
+ return (GSS_S_FAILURE);
+ }
+ memset(name, 0, sizeof(struct _gss_name));
+
+ major_status = _gss_copy_oid(minor_status,
+ name_type, &name->gn_type);
+ if (major_status) {
+ free(name);
+ return (GSS_S_FAILURE);
+ }
+
+ major_status = _gss_copy_buffer(minor_status,
+ input_name_buffer, &name->gn_value);
+ if (major_status) {
+ gss_release_name(minor_status, (gss_name_t*) &name);
+ return (GSS_S_FAILURE);
+ }
+
+ SLIST_INIT(&name->gn_mn);
+
+ *output_name = (gss_name_t) name;
+ return (GSS_S_COMPLETE);
+}