Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 654 insertions, 0 deletions

diff --git a/third_party/heimdal/kdc/kdc-plugin.c b/third_party/heimdal/kdc/kdc-plugin.c
new file mode 100644
index 0000000..925c250
--- /dev/null
+++ b/third_party/heimdal/kdc/kdc-plugin.c
@@ -0,0 +1,654 @@
+/*
+ * Copyright (c) 2007 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Portions (c) 2021, 2022 PADL Software Pty Ltd.
+ *
+ * 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 the Institute 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 THE INSTITUTE 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 INSTITUTE 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 "kdc_locl.h"
+
+static int have_plugin = 0;
+
+/*
+ * Pick the first KDC plugin module that we find.
+ */
+
+static const char *kdc_plugin_deps[] = {
+    "kdc",
+    "krb5",
+    "hdb",
+    NULL
+};
+
+static struct heim_plugin_data kdc_plugin_data = {
+    "krb5",
+    "kdc",
+    KRB5_PLUGIN_KDC_VERSION_10,
+    kdc_plugin_deps,
+    kdc_get_instance
+};
+
+static krb5_error_code KRB5_LIB_CALL
+load(krb5_context context, const void *plug, void *plugctx, void *userctx)
+{
+    have_plugin = 1;
+    return KRB5_PLUGIN_NO_HANDLE;
+}
+
+KDC_LIB_FUNCTION krb5_error_code KDC_LIB_CALL
+krb5_kdc_plugin_init(krb5_context context)
+{
+    (void)_krb5_plugin_run_f(context, &kdc_plugin_data, 0, NULL, load);
+
+    return 0;
+}
+
+struct generate_uc {
+    astgs_request_t r;
+    hdb_entry *client;
+    hdb_entry *server;
+    const krb5_keyblock *reply_key;
+    uint64_t pac_attributes;
+    krb5_pac *pac;
+};
+
+static krb5_error_code KRB5_LIB_CALL
+generate(krb5_context context, const void *plug, void *plugctx, void *userctx)
+{
+    const krb5plugin_kdc_ftable *ft = (const krb5plugin_kdc_ftable *)plug;
+    struct generate_uc *uc = (struct generate_uc *)userctx;    
+
+    if (ft->pac_generate == NULL)
+	return KRB5_PLUGIN_NO_HANDLE;
+
+    return ft->pac_generate((void *)plug,
+			    uc->r,
+			    uc->client,
+			    uc->server,
+			    uc->reply_key,
+			    uc->pac_attributes,
+			    uc->pac);
+}
+
+
+krb5_error_code
+_kdc_pac_generate(astgs_request_t r,
+		  hdb_entry *client,
+		  hdb_entry *server,
+		  const krb5_keyblock *reply_key,
+		  uint64_t pac_attributes,
+		  krb5_pac *pac)
+{
+    krb5_error_code ret = 0;
+    struct generate_uc uc;
+
+    *pac = NULL;
+
+    if (krb5_config_get_bool_default(r->context, NULL, FALSE, "realms",
+				     client->principal->realm,
+				     "disable_pac", NULL))
+	return 0;
+
+    if (have_plugin) {
+	uc.r = r;
+	uc.client = client;
+	uc.server = server;
+	uc.reply_key = reply_key;
+	uc.pac = pac;
+	uc.pac_attributes = pac_attributes;
+
+	ret = _krb5_plugin_run_f(r->context, &kdc_plugin_data,
+				 0, &uc, generate);
+	if (ret != KRB5_PLUGIN_NO_HANDLE)
+	    return ret;
+	ret = 0;
+    }
+
+    if (*pac == NULL)
+	ret = krb5_pac_init(r->context, pac);
+
+    return ret;
+}
+
+struct verify_uc {
+    astgs_request_t r;
+    krb5_principal client_principal;
+    krb5_principal delegated_proxy_principal;
+    hdb_entry *client;
+    hdb_entry *server;
+    hdb_entry *krbtgt;
+    krb5_pac *pac;
+};
+
+static krb5_error_code KRB5_LIB_CALL
+verify(krb5_context context, const void *plug, void *plugctx, void *userctx)
+{
+    const krb5plugin_kdc_ftable *ft = (const krb5plugin_kdc_ftable *)plug;
+    struct verify_uc *uc = (struct verify_uc *)userctx;
+    krb5_error_code ret;
+
+    if (ft->pac_verify == NULL)
+	return KRB5_PLUGIN_NO_HANDLE;
+
+    ret = ft->pac_verify((void *)plug,
+			 uc->r,
+			 uc->client_principal,
+			 uc->delegated_proxy_principal,
+			 uc->client, uc->server, uc->krbtgt, uc->pac);
+    return ret;
+}
+
+krb5_error_code
+_kdc_pac_verify(astgs_request_t r,
+		const krb5_principal client_principal,
+		const krb5_principal delegated_proxy_principal,
+		hdb_entry *client,
+		hdb_entry *server,
+		hdb_entry *krbtgt,
+		krb5_pac *pac)
+{
+    struct verify_uc uc;
+
+    if (!have_plugin)
+	return KRB5_PLUGIN_NO_HANDLE;
+
+    uc.r = r;
+    uc.client_principal = client_principal;
+    uc.delegated_proxy_principal = delegated_proxy_principal;
+    uc.client = client;
+    uc.server = server;
+    uc.krbtgt = krbtgt;
+    uc.pac = pac;
+
+    return _krb5_plugin_run_f(r->context, &kdc_plugin_data,
+			     0, &uc, verify);
+}
+
+static krb5_error_code KRB5_LIB_CALL
+check(krb5_context context, const void *plug, void *plugctx, void *userctx)
+{
+    const krb5plugin_kdc_ftable *ft = (const krb5plugin_kdc_ftable *)plug;
+
+    if (ft->client_access == NULL)
+	return KRB5_PLUGIN_NO_HANDLE;
+    return ft->client_access((void *)plug, userctx);
+}
+
+krb5_error_code
+_kdc_check_access(astgs_request_t r)
+{
+    krb5_error_code ret = KRB5_PLUGIN_NO_HANDLE;
+
+    if (have_plugin) {
+        ret = _krb5_plugin_run_f(r->context, &kdc_plugin_data,
+                                 0, r, check);
+    }
+
+    if (ret == KRB5_PLUGIN_NO_HANDLE)
+        return kdc_check_flags(r, r->req.msg_type == krb_as_req,
+                               r->client, r->server);
+    return ret;
+}
+
+static krb5_error_code KRB5_LIB_CALL
+referral_policy(krb5_context context, const void *plug, void *plugctx, void *userctx)
+{
+    const krb5plugin_kdc_ftable *ft = (const krb5plugin_kdc_ftable *)plug;
+
+    if (ft->referral_policy == NULL)
+	return KRB5_PLUGIN_NO_HANDLE;
+    return ft->referral_policy((void *)plug, userctx);
+}
+
+krb5_error_code
+_kdc_referral_policy(astgs_request_t r)
+{
+    krb5_error_code ret = KRB5_PLUGIN_NO_HANDLE;
+
+    if (have_plugin)
+        ret = _krb5_plugin_run_f(r->context, &kdc_plugin_data, 0, r, referral_policy);
+
+    return ret;
+}
+
+static krb5_error_code KRB5_LIB_CALL
+finalize_reply(krb5_context context, const void *plug, void *plugctx, void *userctx)
+{
+    const krb5plugin_kdc_ftable *ft = (const krb5plugin_kdc_ftable *)plug;
+
+    if (ft->finalize_reply == NULL)
+	return KRB5_PLUGIN_NO_HANDLE;
+    return ft->finalize_reply((void *)plug, userctx);
+}
+
+krb5_error_code
+_kdc_finalize_reply(astgs_request_t r)
+{
+    krb5_error_code ret = KRB5_PLUGIN_NO_HANDLE;
+
+    if (have_plugin)
+        ret = _krb5_plugin_run_f(r->context, &kdc_plugin_data, 0, r, finalize_reply);
+
+    if (ret == KRB5_PLUGIN_NO_HANDLE)
+        ret = 0;
+
+    return ret;
+}
+
+static krb5_error_code KRB5_LIB_CALL
+audit(krb5_context context, const void *plug, void *plugctx, void *userctx)
+{
+    const krb5plugin_kdc_ftable *ft = (const krb5plugin_kdc_ftable *)plug;
+
+    if (ft->audit == NULL)
+	return KRB5_PLUGIN_NO_HANDLE;
+    return ft->audit((void *)plug, userctx);
+}
+
+krb5_error_code
+_kdc_plugin_audit(astgs_request_t r)
+{
+    krb5_error_code ret = KRB5_PLUGIN_NO_HANDLE;
+
+    if (have_plugin)
+        ret = _krb5_plugin_run_f(r->context, &kdc_plugin_data, 0, r, audit);
+
+    if (ret == KRB5_PLUGIN_NO_HANDLE)
+        ret = 0;
+
+    return ret;
+}
+
+KDC_LIB_FUNCTION uintptr_t KDC_LIB_CALL
+kdc_get_instance(const char *libname)
+{
+    static const char *instance = "libkdc";
+
+    if (strcmp(libname, "kdc") == 0)
+        return (uintptr_t)instance;
+    else if (strcmp(libname, "hdb") == 0)
+	return hdb_get_instance(libname);
+    else if (strcmp(libname, "krb5") == 0)
+        return krb5_get_instance(libname);
+
+    return 0;
+}
+
+/*
+ * Minimum API surface wrapper for libheimbase object types so it
+ * may remain a private interface, yet plugins can interact with
+ * objects.
+ */
+
+KDC_LIB_FUNCTION kdc_object_t KDC_LIB_CALL
+kdc_object_alloc(size_t size, const char *name, kdc_type_dealloc dealloc)
+{
+    return heim_alloc(size, name, dealloc);
+}
+
+KDC_LIB_FUNCTION kdc_object_t KDC_LIB_CALL
+kdc_object_retain(kdc_object_t o)
+{
+    return heim_retain(o);
+}
+
+KDC_LIB_FUNCTION void KDC_LIB_CALL
+kdc_object_release(kdc_object_t o)
+{
+    heim_release(o);
+}
+
+KDC_LIB_FUNCTION kdc_object_t KDC_LIB_CALL
+kdc_bool_create(krb5_boolean v)
+{
+    return heim_bool_create(v);
+}
+
+KDC_LIB_FUNCTION krb5_boolean KDC_LIB_CALL
+kdc_bool_get_value(kdc_object_t o)
+{
+    return heim_bool_val(o);
+}
+
+struct kdc_array_iterator_trampoline_data {
+    kdc_array_iterator_t iter;
+    void *data;
+};
+
+/*
+ * Calling convention shim to avoid needing to update all internal
+ * consumers of heim_array_iterate_f()
+ */
+static void
+_kdc_array_iterator_trampoline(kdc_object_t o, void *data, int *stop)
+{
+    struct kdc_array_iterator_trampoline_data *t = data;
+
+    t->iter(o, t->data, stop);
+}
+
+KDC_LIB_FUNCTION void KDC_LIB_CALL
+kdc_array_iterate(kdc_array_t a, void *d, kdc_array_iterator_t iter)
+{
+    struct kdc_array_iterator_trampoline_data t;
+
+    t.iter = iter;
+    t.data = d;
+
+    heim_array_iterate_f((heim_array_t)a, &t, _kdc_array_iterator_trampoline);
+}
+
+KDC_LIB_FUNCTION size_t KDC_LIB_CALL
+kdc_array_get_length(kdc_array_t a)
+{
+    return heim_array_get_length((heim_array_t)a);
+}
+
+KDC_LIB_FUNCTION kdc_object_t KDC_LIB_CALL
+kdc_array_get_value(heim_array_t a, size_t i)
+{
+    return heim_array_get_value((heim_array_t)a, i);
+}
+
+KDC_LIB_FUNCTION kdc_object_t KDC_LIB_CALL
+kdc_array_copy_value(heim_array_t a, size_t i)
+{
+    return heim_array_copy_value((heim_array_t)a, i);
+}
+
+KDC_LIB_FUNCTION kdc_string_t KDC_LIB_CALL
+kdc_string_create(const char *s)
+{
+    return (kdc_string_t)heim_string_create(s);
+}
+
+KDC_LIB_FUNCTION const char * KDC_LIB_CALL
+kdc_string_get_utf8(kdc_string_t s)
+{
+    return heim_string_get_utf8((heim_string_t)s);
+}
+
+KDC_LIB_FUNCTION kdc_data_t
+kdc_data_create(const void *d, size_t len)
+{
+    return (kdc_data_t)heim_data_create(d, len);
+}
+
+KDC_LIB_FUNCTION const krb5_data * KDC_LIB_CALL
+kdc_data_get_data(kdc_data_t d)
+{
+    return heim_data_get_data((heim_data_t)d);
+}
+
+KDC_LIB_FUNCTION kdc_number_t KDC_LIB_CALL
+kdc_number_create(int64_t v)
+{
+    return (kdc_number_t)heim_number_create(v);
+}
+
+KDC_LIB_FUNCTION int64_t KDC_LIB_CALL
+kdc_number_get_value(kdc_number_t n)
+{
+    return heim_number_get_long((heim_number_t)n);
+}
+
+/*
+ * Plugin accessors
+ */
+
+KDC_LIB_FUNCTION krb5_error_code KDC_LIB_CALL
+kdc_request_add_reply_padata(astgs_request_t r, PA_DATA *md)
+{
+    heim_assert(r->rep.padata != NULL, "reply padata not allocated");
+    return add_METHOD_DATA(r->rep.padata, md);
+}
+
+KDC_LIB_FUNCTION krb5_error_code KDC_LIB_CALL
+kdc_request_add_encrypted_padata(astgs_request_t r, PA_DATA *md)
+{
+    if (r->ek.encrypted_pa_data == NULL) {
+	r->ek.encrypted_pa_data = calloc(1, sizeof *(r->ek.encrypted_pa_data));
+	if (r->ek.encrypted_pa_data == NULL) {
+	    return ENOMEM;
+	}
+    }
+
+    return add_METHOD_DATA(r->ek.encrypted_pa_data, md);
+}
+
+KDC_LIB_FUNCTION krb5_error_code KDC_LIB_CALL
+kdc_request_add_pac_buffer(astgs_request_t r,
+			   uint32_t pactype,
+			   const krb5_data *d)
+{
+    krb5_error_code ret;
+    krb5_pac pac;
+
+    if (r->pac == NULL) {
+	ret = krb5_pac_init(r->context, &pac);
+	if (ret)
+	    return ret;
+    } else
+	pac = heim_retain(r->pac);
+
+    ret = krb5_pac_add_buffer(r->context, pac, pactype, d);
+    if (ret == 0 && r->pac == NULL)
+	r->pac = pac;
+    else
+	heim_release(pac);
+
+    return ret;
+}
+
+#undef _KDC_REQUEST_GET_ACCESSOR
+#define _KDC_REQUEST_GET_ACCESSOR(R, T, f)		    \
+    KDC_LIB_FUNCTION T KDC_LIB_CALL			    \
+    kdc_request_get_ ## f(R r)				    \
+    {							    \
+	return r->f;					    \
+    }
+
+#undef _KDC_REQUEST_SET_ACCESSOR
+#define _KDC_REQUEST_SET_ACCESSOR(R, T, f)		    \
+    KDC_LIB_FUNCTION void KDC_LIB_CALL			    \
+    kdc_request_set_ ## f(R r, T v)			    \
+    {							    \
+	r->f = v;					    \
+    }
+
+#undef _KDC_REQUEST_GET_ACCESSOR_PTR
+#define _KDC_REQUEST_GET_ACCESSOR_PTR(R, T,  f)		    \
+    KDC_LIB_FUNCTION const T KDC_LIB_CALL		    \
+    kdc_request_get_ ## f(R r)				    \
+    {							    \
+	return r->f;					    \
+    }
+
+#undef _KDC_REQUEST_SET_ACCESSOR_PTR
+#define _KDC_REQUEST_SET_ACCESSOR_PTR(R, T, t, f)	    \
+    KDC_LIB_FUNCTION krb5_error_code KDC_LIB_CALL	    \
+    kdc_request_set_ ## f(R r, const T v)		    \
+    {							    \
+	krb5_error_code ret;				    \
+	T tmp;						    \
+							    \
+	if (v == r->f)					    \
+	    return 0;					    \
+	else if (v) {					    \
+	    ret = copy_##t(v, &tmp);			    \
+	    if (ret)					    \
+		return ret;				    \
+	} else						    \
+	    tmp = NULL;					    \
+							    \
+	free_##t(r->f);					    \
+	r->f = tmp;					    \
+							    \
+	return 0;					    \
+    }
+
+#undef _KDC_REQUEST_GET_ACCESSOR_STRUCT
+#define _KDC_REQUEST_GET_ACCESSOR_STRUCT(R, T, f)	    \
+    KDC_LIB_FUNCTION const T * KDC_LIB_CALL		    \
+    kdc_request_get_ ## f(R r)				    \
+    {							    \
+	return &r->f;					    \
+    }
+
+#undef _KDC_REQUEST_SET_ACCESSOR_STRUCT
+#define _KDC_REQUEST_SET_ACCESSOR_STRUCT(R, T, t, f)	    \
+    KDC_LIB_FUNCTION krb5_error_code KDC_LIB_CALL	    \
+    kdc_request_set_ ## f(R r, const T *v)		    \
+    {							    \
+	krb5_error_code ret;				    \
+	T tmp;						    \
+							    \
+	if (v == NULL)					    \
+	    return EINVAL;				    \
+	else if (v == &r->f)				    \
+	    return 0;					    \
+							    \
+	ret = copy_##t(v, &tmp);			    \
+	if (ret)					    \
+	    return ret;					    \
+							    \
+	free_##t(&r->f);				    \
+	r->f = tmp;					    \
+							    \
+	return 0;					    \
+    }
+
+static krb5_error_code
+copy_string_ptr(const char *src, char **dst)
+{
+    *dst = strdup(src);
+    if (*dst == NULL)
+	return ENOMEM;
+
+    return 0;
+}
+
+static void
+free_string_ptr(char *s)
+{
+    free(s);
+}
+
+static krb5_error_code
+copy_Principal_ptr(krb5_const_principal src, krb5_principal *dst)
+{
+    krb5_error_code ret;
+    krb5_principal p;
+
+    *dst = NULL;
+
+    p = calloc(1, sizeof(*p));
+    if (p == NULL)
+	return ENOMEM;
+
+    ret = copy_Principal(src, p);
+    if (ret == 0)
+	*dst = p;
+    else
+	free(p);
+
+    return ret;
+}
+
+static void
+free_Principal_ptr(krb5_principal p)
+{
+    if (p) {
+	free_Principal(p);
+	free(p);
+    }
+}
+
+static krb5_error_code
+copy_pac(const struct krb5_pac_data *src, struct krb5_pac_data **dst)
+{
+    /* FIXME use heim_copy() when it exists */
+    *dst = (krb5_pac)heim_retain((heim_object_t)src);
+    return 0;
+}
+
+static void
+free_pac(struct krb5_pac_data *o)
+{
+    heim_release(o);
+}
+
+static krb5_error_code
+copy_keyblock(const EncryptionKey *src, EncryptionKey *dst)
+{
+    return copy_EncryptionKey(src, dst);
+}
+
+static void
+free_keyblock(EncryptionKey *key)
+{
+    krb5_free_keyblock_contents(NULL, key);
+}
+
+#undef HEIMDAL_KDC_KDC_ACCESSORS_H
+#include "kdc-accessors.h"
+
+#undef _KDC_REQUEST_GET_ACCESSOR
+#undef _KDC_REQUEST_SET_ACCESSOR
+
+#undef _KDC_REQUEST_GET_ACCESSOR_PTR
+#undef _KDC_REQUEST_SET_ACCESSOR_PTR
+#define _KDC_REQUEST_SET_ACCESSOR_PTR(R, T, t, f)	    \
+    void						    \
+    _kdc_request_set_ ## f ## _nocopy(R r, T *v)	    \
+    {							    \
+	if (*v != r->f) {				    \
+	    free_##t(r->f);				    \
+	    r->f = *v;					    \
+	}						    \
+	*v = NULL;					    \
+    }
+
+#undef _KDC_REQUEST_GET_ACCESSOR_STRUCT
+#undef _KDC_REQUEST_SET_ACCESSOR_STRUCT
+#define _KDC_REQUEST_SET_ACCESSOR_STRUCT(R, T, t, f)	    \
+    void						    \
+    _kdc_request_set_ ## f ## _nocopy(R r, T *v)	    \
+    {							    \
+	if (v != &r->f) {				    \
+	    free_##t(&r->f);				    \
+	    r->f = *v;					    \
+	}						    \
+	memset(v, 0, sizeof(*v));			    \
+    }
+
+#undef HEIMDAL_KDC_KDC_ACCESSORS_H
+#include "kdc-accessors.h"