diff --git a/sys/security/mac_partition/mac_partition.c b/sys/security/mac_partition/mac_partition.c new file mode 100644 index 000000000000..6636bef67b53 --- /dev/null +++ b/sys/security/mac_partition/mac_partition.c @@ -0,0 +1,288 @@ +/*- + * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson + * Copyright (c) 2001, 2002 Networks Associates Technology, Inc. + * All rights reserved. + * + * This software was developed by Robert Watson for the TrustedBSD Project. + * + * This software was developed for the FreeBSD Project in part by NAI Labs, + * the Security Research Division of Network Associates, Inc. under + * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA + * CHATS research program. + * + * 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. The names of the authors may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * 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. + * + * $FreeBSD$ + */ + +/* + * Developed by the TrustedBSD Project. + * Experiment with a partition-like model. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include + +#include + +#include + +#include + +SYSCTL_DECL(_security_mac); + +SYSCTL_NODE(_security_mac, OID_AUTO, partition, CTLFLAG_RW, 0, + "TrustedBSD mac_partition policy controls"); + +static int mac_partition_enabled = 1; +SYSCTL_INT(_security_mac_partition, OID_AUTO, enabled, CTLFLAG_RW, + &mac_partition_enabled, 0, "Enforce partition policy"); + +static int partition_slot; +#define SLOT(l) (LABEL_TO_SLOT((l), partition_slot).l_long) + +static void +mac_partition_init(struct mac_policy_conf *conf) +{ + +} + +static void +mac_partition_init_label(struct label *label) +{ + + SLOT(label) = 0; +} + +static void +mac_partition_destroy_label(struct label *label) +{ + + SLOT(label) = 0; +} + +static int +mac_partition_externalize_label(struct label *label, char *element_name, + char *element_data, size_t size, size_t *len, int *claimed) +{ + + if (strcmp(MAC_PARTITION_LABEL_NAME, element_name) != 0) + return (0); + + (*claimed)++; + *len = snprintf(element_data, size, "%ld", SLOT(label)); + return (0); +} + +static int +mac_partition_internalize_label(struct label *label, char *element_name, + char *element_data, int *claimed) +{ + + if (strcmp(MAC_PARTITION_LABEL_NAME, element_name) != 0) + return (0); + + (*claimed)++; + SLOT(label) = strtol(element_data, NULL, 10); + return (0); +} + +static void +mac_partition_create_cred(struct ucred *cred_parent, struct ucred *cred_child) +{ + + SLOT(&cred_child->cr_label) = SLOT(&cred_parent->cr_label); +} + +static void +mac_partition_create_proc0(struct ucred *cred) +{ + + SLOT(&cred->cr_label) = 0; +} + +static void +mac_partition_create_proc1(struct ucred *cred) +{ + + SLOT(&cred->cr_label) = 0; +} + +static void +mac_partition_relabel_cred(struct ucred *cred, struct label *newlabel) +{ + + if (SLOT(newlabel) != 0) + SLOT(&cred->cr_label) = SLOT(newlabel); +} + +static int +label_on_label(struct label *subject, struct label *object) +{ + + if (mac_partition_enabled == 0) + return (0); + + if (SLOT(subject) == 0) + return (0); + + if (SLOT(subject) == SLOT(object)) + return (0); + + return (EPERM); +} + +static int +mac_partition_check_cred_relabel(struct ucred *cred, struct label *newlabel) +{ + int error; + + error = 0; + + /* Treat "0" as a no-op request. */ + if (SLOT(newlabel) != 0) { + /* If we're already in a partition, can't repartition. */ + if (SLOT(&cred->cr_label) != 0) + return (EPERM); + + /* + * If not in a partition, must have privilege to create + * one. + */ + error = suser_cred(cred, 0); + } + + return (error); +} + +static int +mac_partition_check_cred_visible(struct ucred *u1, struct ucred *u2) +{ + int error; + + error = label_on_label(&u1->cr_label, &u2->cr_label); + + return (error == 0 ? 0 : ESRCH); +} + +static int +mac_partition_check_proc_debug(struct ucred *cred, struct proc *proc) +{ + int error; + + error = label_on_label(&cred->cr_label, &proc->p_ucred->cr_label); + + return (error ? ESRCH : 0); +} + +static int +mac_partition_check_proc_sched(struct ucred *cred, struct proc *proc) +{ + int error; + + error = label_on_label(&cred->cr_label, &proc->p_ucred->cr_label); + + return (error ? ESRCH : 0); +} + +static int +mac_partition_check_proc_signal(struct ucred *cred, struct proc *proc, + int signum) +{ + int error; + + error = label_on_label(&cred->cr_label, &proc->p_ucred->cr_label); + + return (error ? ESRCH : 0); +} + +static int +mac_partition_check_socket_visible(struct ucred *cred, struct socket *socket, + struct label *socketlabel) +{ + int error; + + error = label_on_label(&cred->cr_label, socketlabel); + + return (error ? ENOENT : 0); +} + +static struct mac_policy_op_entry mac_partition_ops[] = +{ + { MAC_INIT, + (macop_t)mac_partition_init }, + { MAC_INIT_CRED_LABEL, + (macop_t)mac_partition_init_label }, + { MAC_DESTROY_CRED_LABEL, + (macop_t)mac_partition_destroy_label }, + { MAC_EXTERNALIZE_CRED_LABEL, + (macop_t)mac_partition_externalize_label }, + { MAC_INTERNALIZE_CRED_LABEL, + (macop_t)mac_partition_internalize_label }, + { MAC_CREATE_CRED, + (macop_t)mac_partition_create_cred }, + { MAC_CREATE_PROC0, + (macop_t)mac_partition_create_proc0 }, + { MAC_CREATE_PROC1, + (macop_t)mac_partition_create_proc1 }, + { MAC_RELABEL_CRED, + (macop_t)mac_partition_relabel_cred }, + { MAC_CHECK_CRED_RELABEL, + (macop_t)mac_partition_check_cred_relabel }, + { MAC_CHECK_CRED_VISIBLE, + (macop_t)mac_partition_check_cred_visible }, + { MAC_CHECK_PROC_DEBUG, + (macop_t)mac_partition_check_proc_debug }, + { MAC_CHECK_PROC_SCHED, + (macop_t)mac_partition_check_proc_sched }, + { MAC_CHECK_PROC_SIGNAL, + (macop_t)mac_partition_check_proc_signal }, + { MAC_CHECK_SOCKET_VISIBLE, + (macop_t)mac_partition_check_socket_visible }, + { MAC_OP_LAST, NULL } +}; + +MAC_POLICY_SET(mac_partition_ops, trustedbsd_mac_partition, + "TrustedBSD MAC/Partition", MPC_LOADTIME_FLAG_UNLOADOK, &partition_slot); diff --git a/sys/security/mac_partition/mac_partition.h b/sys/security/mac_partition/mac_partition.h new file mode 100644 index 000000000000..669740e08efa --- /dev/null +++ b/sys/security/mac_partition/mac_partition.h @@ -0,0 +1,49 @@ +/*- + * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson + * Copyright (c) 2001, 2002 Networks Associates Technology, Inc. + * All rights reserved. + * + * This software was developed by Robert Watson for the TrustedBSD Project. + * + * This software was developed for the FreeBSD Project in part by NAI Labs, + * the Security Research Division of Network Associates, Inc. under + * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA + * CHATS research program. + * + * 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. The names of the authors may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * 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. + * + * $FreeBSD$ + */ + +/* + * Definitions for the TrustedBSD partition policy module. + */ + +#ifndef _SYS_SECURITY_MAC_PARTITION_H +#define _SYS_SECURITY_MAC_PARTITION_H + +#define MAC_PARTITION_LABEL_NAME "partition" + +#endif /* !_SYS_SECURITY_MAC_PARTITION_H */