| Message ID | 1675119451-23180-2-git-send-email-wufan@linux.microsoft.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | Paul Moore |
| Headers | show |
| Series | Integrity Policy Enforcement LSM (IPE) | expand |
On Mon, Jan 30, 2023 at 5:58 PM Fan Wu <wufan@linux.microsoft.com> wrote: > > From: Deven Bowers <deven.desai@linux.microsoft.com> > > Integrity Policy Enforcement (IPE) is an LSM that provides an > complimentary approach to Mandatory Access Control than existing LSMs > today. > > Existing LSMs have centered around the concept of access to a resource > should be controlled by the current user's credentials. IPE's approach, > is that access to a resource should be controlled by the system's trust > of a current resource. > > The basis of this approach is defining a global policy to specify which > resource can be trusted. > > Signed-off-by: Deven Bowers <deven.desai@linux.microsoft.com> > Signed-off-by: Fan Wu <wufan@linux.microsoft.com> ... > --- > MAINTAINERS | 5 +++++ > security/Kconfig | 11 ++++++----- > security/Makefile | 1 + > security/ipe/Kconfig | 17 +++++++++++++++++ > security/ipe/Makefile | 10 ++++++++++ > security/ipe/ipe.c | 40 ++++++++++++++++++++++++++++++++++++++++ > security/ipe/ipe.h | 13 +++++++++++++ > 7 files changed, 92 insertions(+), 5 deletions(-) > create mode 100644 security/ipe/Kconfig > create mode 100644 security/ipe/Makefile > create mode 100644 security/ipe/ipe.c > create mode 100644 security/ipe/ipe.h > > diff --git a/MAINTAINERS b/MAINTAINERS > index 8a5c25c20d00..5e27e84763cc 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -10273,6 +10273,11 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git > F: security/integrity/ima/ > F: security/integrity/ > > +INTEGRITY POLICY ENFORCEMENT (IPE) > +M: Fan Wu <wufan@linux.microsoft.com> > +S: Supported > +F: security/ipe/ You should probably add a mailing list (L:) and source tree URL (T:) to the IPE entry. You can use the LSM mailing list to start if you like, there are several LSMs that do that today, e.g. Smack, Landlock, etc. As far as the source tree is concerned, probably the easiest option is a simple GitHub repo, but there are plenty of other choices too. Both the mailing list and the source URLs can always be updated in the future so don't worry too much about being stuck with either long term. -- paul-moore.com
On Thu, Mar 02, 2023 at 02:00:48PM -0500, Paul Moore wrote: > On Mon, Jan 30, 2023 at 5:58???PM Fan Wu <wufan@linux.microsoft.com> wrote: > > diff --git a/MAINTAINERS b/MAINTAINERS > > index 8a5c25c20d00..5e27e84763cc 100644 > > --- a/MAINTAINERS > > +++ b/MAINTAINERS > > @@ -10273,6 +10273,11 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git > > F: security/integrity/ima/ > > F: security/integrity/ > > > > +INTEGRITY POLICY ENFORCEMENT (IPE) > > +M: Fan Wu <wufan@linux.microsoft.com> > > +S: Supported > > +F: security/ipe/ > > You should probably add a mailing list (L:) and source tree URL (T:) > to the IPE entry. You can use the LSM mailing list to start if you > like, there are several LSMs that do that today, e.g. Smack, Landlock, > etc. As far as the source tree is concerned, probably the easiest > option is a simple GitHub repo, but there are plenty of other choices > too. > > Both the mailing list and the source URLs can always be updated in the > future so don't worry too much about being stuck with either long > term. > > -- > paul-moore.com We do have a github repo, I will add that link in the next version. -Fan
diff --git a/MAINTAINERS b/MAINTAINERS index 8a5c25c20d00..5e27e84763cc 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10273,6 +10273,11 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git F: security/integrity/ima/ F: security/integrity/ +INTEGRITY POLICY ENFORCEMENT (IPE) +M: Fan Wu <wufan@linux.microsoft.com> +S: Supported +F: security/ipe/ + INTEL 810/815 FRAMEBUFFER DRIVER M: Antonino Daplas <adaplas@gmail.com> L: linux-fbdev@vger.kernel.org diff --git a/security/Kconfig b/security/Kconfig index e6db09a779b7..9f59add2d16c 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -207,6 +207,7 @@ source "security/yama/Kconfig" source "security/safesetid/Kconfig" source "security/lockdown/Kconfig" source "security/landlock/Kconfig" +source "security/ipe/Kconfig" source "security/integrity/Kconfig" @@ -246,11 +247,11 @@ endchoice config LSM string "Ordered list of enabled LSMs" - default "landlock,lockdown,yama,loadpin,safesetid,integrity,smack,selinux,tomoyo,apparmor,bpf" if DEFAULT_SECURITY_SMACK - default "landlock,lockdown,yama,loadpin,safesetid,integrity,apparmor,selinux,smack,tomoyo,bpf" if DEFAULT_SECURITY_APPARMOR - default "landlock,lockdown,yama,loadpin,safesetid,integrity,tomoyo,bpf" if DEFAULT_SECURITY_TOMOYO - default "landlock,lockdown,yama,loadpin,safesetid,integrity,bpf" if DEFAULT_SECURITY_DAC - default "landlock,lockdown,yama,loadpin,safesetid,integrity,selinux,smack,tomoyo,apparmor,bpf" + default "landlock,lockdown,yama,loadpin,safesetid,integrity,ipe,smack,selinux,tomoyo,apparmor,bpf" if DEFAULT_SECURITY_SMACK + default "landlock,lockdown,yama,loadpin,safesetid,integrity,ipe,apparmor,selinux,smack,tomoyo,bpf" if DEFAULT_SECURITY_APPARMOR + default "landlock,lockdown,yama,loadpin,safesetid,integrity,ipe,tomoyo,bpf" if DEFAULT_SECURITY_TOMOYO + default "landlock,lockdown,yama,loadpin,safesetid,integrity,ipe,bpf" if DEFAULT_SECURITY_DAC + default "landlock,lockdown,yama,loadpin,safesetid,integrity,ipe,selinux,smack,tomoyo,apparmor,bpf" help A comma-separated list of LSMs, in initialization order. Any LSMs left off this list will be ignored. This can be diff --git a/security/Makefile b/security/Makefile index 18121f8f85cd..527b1864d96c 100644 --- a/security/Makefile +++ b/security/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_SECURITY_LOCKDOWN_LSM) += lockdown/ obj-$(CONFIG_CGROUPS) += device_cgroup.o obj-$(CONFIG_BPF_LSM) += bpf/ obj-$(CONFIG_SECURITY_LANDLOCK) += landlock/ +obj-$(CONFIG_SECURITY_IPE) += ipe/ # Object integrity file lists obj-$(CONFIG_INTEGRITY) += integrity/ diff --git a/security/ipe/Kconfig b/security/ipe/Kconfig new file mode 100644 index 000000000000..e4875fb04883 --- /dev/null +++ b/security/ipe/Kconfig @@ -0,0 +1,17 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Integrity Policy Enforcement (IPE) configuration +# + +menuconfig SECURITY_IPE + bool "Integrity Policy Enforcement (IPE)" + depends on SECURITY && SECURITYFS + select PKCS7_MESSAGE_PARSER + select SYSTEM_DATA_VERIFICATION + help + This option enables the Integrity Policy Enforcement LSM + allowing users to define a policy to enforce a trust-based access + control. A key feature of IPE is a customizable policy to allow + admins to reconfigure trust requirements on the fly. + + If unsure, answer N. diff --git a/security/ipe/Makefile b/security/ipe/Makefile new file mode 100644 index 000000000000..571648579991 --- /dev/null +++ b/security/ipe/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (C) Microsoft Corporation. All rights reserved. +# +# Makefile for building the IPE module as part of the kernel tree. +# + +obj-$(CONFIG_SECURITY_IPE) += \ + hooks.o \ + ipe.o \ diff --git a/security/ipe/ipe.c b/security/ipe/ipe.c new file mode 100644 index 000000000000..9ed3bf4dcc04 --- /dev/null +++ b/security/ipe/ipe.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) Microsoft Corporation. All rights reserved. + */ + +#include "ipe.h" + +static struct lsm_blob_sizes ipe_blobs __lsm_ro_after_init = { +}; + +static struct security_hook_list ipe_hooks[] __lsm_ro_after_init = { +}; + +/** + * ipe_init - Entry point of IPE. + * + * This is called at LSM init, which happens occurs early during kernel + * start up. During this phase, IPE loads the properties compiled into + * the kernel, and register's IPE's hooks. The boot policy is loaded + * later, during securityfs init, at which point IPE will start + * enforcing its policy. + * + * Return: + * * 0 - OK + * * -ENOMEM - Context creation failed. + */ +static int __init ipe_init(void) +{ + int rc = 0; + + security_add_hooks(ipe_hooks, ARRAY_SIZE(ipe_hooks), "ipe"); + + return rc; +} + +DEFINE_LSM(ipe) = { + .name = "ipe", + .init = ipe_init, + .blobs = &ipe_blobs, +}; diff --git a/security/ipe/ipe.h b/security/ipe/ipe.h new file mode 100644 index 000000000000..ee7ec3f3b55d --- /dev/null +++ b/security/ipe/ipe.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) Microsoft Corporation. All rights reserved. + */ + +#ifndef IPE_H +#define IPE_H + +#define pr_fmt(fmt) "IPE " fmt "\n" + +#include <linux/lsm_hooks.h> + +#endif /* IPE_H */