| Message ID | 1709768084-22539-2-git-send-email-wufan@linux.microsoft.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Integrity Policy Enforcement LSM (IPE) | expand |
On Wed, 2024-03-06 at 15:34 -0800, Fan Wu 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> > --- > v2: > + Split evaluation loop, access control hooks, > and evaluation loop from policy parser and userspace > interface to pass mailing list character limit > > v3: > + Move ipe_load_properties to patch 04. > + Remove useless 0-initializations > + Prefix extern variables with ipe_ > + Remove kernel module parameters, as these are > exposed through sysctls. > + Add more prose to the IPE base config option > help text. > + Use GFP_KERNEL for audit_log_start. > + Remove unnecessary caching system. > + Remove comments from headers > + Use rcu_access_pointer for rcu-pointer null check > + Remove usage of reqprot; use prot only. > + Move policy load and activation audit event to 03/12 > > v4: > + Remove sysctls in favor of securityfs nodes > + Re-add kernel module parameters, as these are now > exposed through securityfs. > + Refactor property audit loop to a separate function. > > v5: > + fix minor grammatical errors > + do not group rule by curly-brace in audit record, > reconstruct the exact rule. > > v6: > + No changes > > v7: > + Further split lsm creation into a separate commit from the > evaluation loop and audit system, for easier review. > > + Introduce the concept of an ipe_context, a scoped way to > introduce execution policies, used initially for allowing for > kunit tests in isolation. > > v8: > + Follow lsmname_hook_name convention for lsm hooks. > + Move LSM blob accessors to ipe.c and mark LSM blobs as static. > > v9: > + Remove ipe_context for simplification > > v10: > + Add github url > > v11: > + Correct github url > + Move ipe before bpf > > v12: > + Switch to use lsm_id instead of string for lsm name > > v13: > + No changes > > v14: > + No changes > --- > MAINTAINERS | 7 +++++++ > include/uapi/linux/lsm.h | 1 + > security/Kconfig | 11 ++++++----- > security/Makefile | 1 + > security/ipe/Kconfig | 17 +++++++++++++++++ > security/ipe/Makefile | 9 +++++++++ > security/ipe/ipe.c | 41 ++++++++++++++++++++++++++++++++++++++++ > security/ipe/ipe.h | 16 ++++++++++++++++ > security/security.c | 3 ++- > 9 files changed, 100 insertions(+), 6 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 13158047f2af..8517011f88ff 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -10650,6 +10650,13 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git > F: security/integrity/ > F: security/integrity/ima/ > > +INTEGRITY POLICY ENFORCEMENT (IPE) > +M: Fan Wu <wufan@linux.microsoft.com> > +L: linux-security-module@vger.kernel.org > +S: Supported > +T: git https://github.com/microsoft/ipe.git > +F: security/ipe/ > + > INTEL 810/815 FRAMEBUFFER DRIVER > M: Antonino Daplas <adaplas@gmail.com> > L: linux-fbdev@vger.kernel.org > diff --git a/include/uapi/linux/lsm.h b/include/uapi/linux/lsm.h > index f8aef9ade549..43e2fb32745a 100644 > --- a/include/uapi/linux/lsm.h > +++ b/include/uapi/linux/lsm.h > @@ -62,6 +62,7 @@ struct lsm_ctx { > #define LSM_ID_LOCKDOWN 108 > #define LSM_ID_BPF 109 > #define LSM_ID_LANDLOCK 110 > +#define LSM_ID_IPE 111 > > /* > * LSM_ATTR_XXX definitions identify different LSM attributes > diff --git a/security/Kconfig b/security/Kconfig > index 52c9af08ad35..cc7adfbb6b96 100644 > --- a/security/Kconfig > +++ b/security/Kconfig > @@ -194,6 +194,7 @@ source "security/yama/Kconfig" > source "security/safesetid/Kconfig" > source "security/lockdown/Kconfig" > source "security/landlock/Kconfig" > +source "security/ipe/Kconfig" > > source "security/integrity/Kconfig" > > @@ -233,11 +234,11 @@ endchoice > > config LSM > string "Ordered list of enabled LSMs" > - default "landlock,lockdown,yama,loadpin,safesetid,smack,selinux,tomoyo,apparmor,bpf" if DEFAULT_SECURITY_SMACK > - default "landlock,lockdown,yama,loadpin,safesetid,apparmor,selinux,smack,tomoyo,bpf" if DEFAULT_SECURITY_APPARMOR > - default "landlock,lockdown,yama,loadpin,safesetid,tomoyo,bpf" if DEFAULT_SECURITY_TOMOYO > - default "landlock,lockdown,yama,loadpin,safesetid,bpf" if DEFAULT_SECURITY_DAC > - default "landlock,lockdown,yama,loadpin,safesetid,selinux,smack,tomoyo,apparmor,bpf" > + default "landlock,lockdown,yama,loadpin,safesetid,smack,selinux,tomoyo,apparmor,ipe,bpf" if DEFAULT_SECURITY_SMACK > + default "landlock,lockdown,yama,loadpin,safesetid,apparmor,selinux,smack,tomoyo,ipe,bpf" if DEFAULT_SECURITY_APPARMOR > + default "landlock,lockdown,yama,loadpin,safesetid,tomoyo,ipe,bpf" if DEFAULT_SECURITY_TOMOYO > + default "landlock,lockdown,yama,loadpin,safesetid,ipe,bpf" if DEFAULT_SECURITY_DAC > + default "landlock,lockdown,yama,loadpin,safesetid,selinux,smack,tomoyo,apparmor,ipe,bpf" > help > A comma-separated list of LSMs, in initialization order. > Any LSMs left off this list, except for those with order > diff --git a/security/Makefile b/security/Makefile > index 59f238490665..cc0982214b84 100644 > --- a/security/Makefile > +++ b/security/Makefile > @@ -25,6 +25,7 @@ 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..f7a80d0f18f8 > --- /dev/null > +++ b/security/ipe/Makefile > @@ -0,0 +1,9 @@ > +# 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) += \ > + ipe.o \ > diff --git a/security/ipe/ipe.c b/security/ipe/ipe.c > new file mode 100644 > index 000000000000..b013aed15e73 > --- /dev/null > +++ b/security/ipe/ipe.c > @@ -0,0 +1,41 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (C) Microsoft Corporation. All rights reserved. > + */ > +#include <uapi/linux/lsm.h> > + > +#include "ipe.h" > + > +static struct lsm_blob_sizes ipe_blobs __ro_after_init = { > +}; > + > +static const struct lsm_id ipe_lsmid = { > + .name = "ipe", > + .id = LSM_ID_IPE, > +}; > + > +static struct security_hook_list ipe_hooks[] __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 registers its hooks and loads the > + * builtin boot policy. > + * Return: > + * * 0 - OK > + * * -ENOMEM - Out of memory > + */ > +static int __init ipe_init(void) > +{ > + security_add_hooks(ipe_hooks, ARRAY_SIZE(ipe_hooks), &ipe_lsmid); > + > + return 0; > +} > + > +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..a1c68d0fc2e0 > --- /dev/null > +++ b/security/ipe/ipe.h > @@ -0,0 +1,16 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Copyright (C) Microsoft Corporation. All rights reserved. > + */ > + > +#ifndef _IPE_H > +#define _IPE_H > + > +#ifdef pr_fmt > +#undef pr_fmt > +#endif > +#define pr_fmt(fmt) "IPE: " fmt > + > +#include <linux/lsm_hooks.h> > + > +#endif /* _IPE_H */ > diff --git a/security/security.c b/security/security.c > index 7035ee35a393..f168bc30a60d 100644 > --- a/security/security.c > +++ b/security/security.c > @@ -51,7 +51,8 @@ > (IS_ENABLED(CONFIG_SECURITY_SAFESETID) ? 1 : 0) + \ > (IS_ENABLED(CONFIG_SECURITY_LOCKDOWN_LSM) ? 1 : 0) + \ > (IS_ENABLED(CONFIG_BPF_LSM) ? 1 : 0) + \ > - (IS_ENABLED(CONFIG_SECURITY_LANDLOCK) ? 1 : 0)) > + (IS_ENABLED(CONFIG_SECURITY_LANDLOCK) ? 1 : 0) + \ > + (IS_ENABLED(CONFIG_SECURITY_IPE) ? 1 : 0)) Hi Fan you would also need to update tools/testing/selftests/lsm/lsm_list_modules_test.c. Roberto > /* > * These are descriptions of the reasons that can be passed to the
On 3/11/2024 7:25 AM, Roberto Sassu wrote: > On Wed, 2024-03-06 at 15:34 -0800, Fan Wu 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> >> --- >> v2: >> + Split evaluation loop, access control hooks, >> and evaluation loop from policy parser and userspace >> interface to pass mailing list character limit >> >> v3: >> + Move ipe_load_properties to patch 04. >> + Remove useless 0-initializations >> + Prefix extern variables with ipe_ >> + Remove kernel module parameters, as these are >> exposed through sysctls. >> + Add more prose to the IPE base config option >> help text. >> + Use GFP_KERNEL for audit_log_start. >> + Remove unnecessary caching system. >> + Remove comments from headers >> + Use rcu_access_pointer for rcu-pointer null check >> + Remove usage of reqprot; use prot only. >> + Move policy load and activation audit event to 03/12 >> >> v4: >> + Remove sysctls in favor of securityfs nodes >> + Re-add kernel module parameters, as these are now >> exposed through securityfs. >> + Refactor property audit loop to a separate function. >> >> v5: >> + fix minor grammatical errors >> + do not group rule by curly-brace in audit record, >> reconstruct the exact rule. >> >> v6: >> + No changes >> >> v7: >> + Further split lsm creation into a separate commit from the >> evaluation loop and audit system, for easier review. >> >> + Introduce the concept of an ipe_context, a scoped way to >> introduce execution policies, used initially for allowing for >> kunit tests in isolation. >> >> v8: >> + Follow lsmname_hook_name convention for lsm hooks. >> + Move LSM blob accessors to ipe.c and mark LSM blobs as static. >> >> v9: >> + Remove ipe_context for simplification >> >> v10: >> + Add github url >> >> v11: >> + Correct github url >> + Move ipe before bpf >> >> v12: >> + Switch to use lsm_id instead of string for lsm name >> >> v13: >> + No changes >> >> v14: >> + No changes >> --- >> MAINTAINERS | 7 +++++++ >> include/uapi/linux/lsm.h | 1 + >> security/Kconfig | 11 ++++++----- >> security/Makefile | 1 + >> security/ipe/Kconfig | 17 +++++++++++++++++ >> security/ipe/Makefile | 9 +++++++++ >> security/ipe/ipe.c | 41 ++++++++++++++++++++++++++++++++++++++++ >> security/ipe/ipe.h | 16 ++++++++++++++++ >> security/security.c | 3 ++- >> 9 files changed, 100 insertions(+), 6 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 13158047f2af..8517011f88ff 100644 >> --- a/MAINTAINERS >> +++ b/MAINTAINERS >> @@ -10650,6 +10650,13 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git >> F: security/integrity/ >> F: security/integrity/ima/ >> >> +INTEGRITY POLICY ENFORCEMENT (IPE) >> +M: Fan Wu <wufan@linux.microsoft.com> >> +L: linux-security-module@vger.kernel.org >> +S: Supported >> +T: git https://github.com/microsoft/ipe.git >> +F: security/ipe/ >> + >> INTEL 810/815 FRAMEBUFFER DRIVER >> M: Antonino Daplas <adaplas@gmail.com> >> L: linux-fbdev@vger.kernel.org >> diff --git a/include/uapi/linux/lsm.h b/include/uapi/linux/lsm.h >> index f8aef9ade549..43e2fb32745a 100644 >> --- a/include/uapi/linux/lsm.h >> +++ b/include/uapi/linux/lsm.h >> @@ -62,6 +62,7 @@ struct lsm_ctx { >> #define LSM_ID_LOCKDOWN 108 >> #define LSM_ID_BPF 109 >> #define LSM_ID_LANDLOCK 110 >> +#define LSM_ID_IPE 111 >> >> /* >> * LSM_ATTR_XXX definitions identify different LSM attributes >> diff --git a/security/Kconfig b/security/Kconfig >> index 52c9af08ad35..cc7adfbb6b96 100644 >> --- a/security/Kconfig >> +++ b/security/Kconfig >> @@ -194,6 +194,7 @@ source "security/yama/Kconfig" >> source "security/safesetid/Kconfig" >> source "security/lockdown/Kconfig" >> source "security/landlock/Kconfig" >> +source "security/ipe/Kconfig" >> >> source "security/integrity/Kconfig" >> >> @@ -233,11 +234,11 @@ endchoice >> >> config LSM >> string "Ordered list of enabled LSMs" >> - default "landlock,lockdown,yama,loadpin,safesetid,smack,selinux,tomoyo,apparmor,bpf" if DEFAULT_SECURITY_SMACK >> - default "landlock,lockdown,yama,loadpin,safesetid,apparmor,selinux,smack,tomoyo,bpf" if DEFAULT_SECURITY_APPARMOR >> - default "landlock,lockdown,yama,loadpin,safesetid,tomoyo,bpf" if DEFAULT_SECURITY_TOMOYO >> - default "landlock,lockdown,yama,loadpin,safesetid,bpf" if DEFAULT_SECURITY_DAC >> - default "landlock,lockdown,yama,loadpin,safesetid,selinux,smack,tomoyo,apparmor,bpf" >> + default "landlock,lockdown,yama,loadpin,safesetid,smack,selinux,tomoyo,apparmor,ipe,bpf" if DEFAULT_SECURITY_SMACK >> + default "landlock,lockdown,yama,loadpin,safesetid,apparmor,selinux,smack,tomoyo,ipe,bpf" if DEFAULT_SECURITY_APPARMOR >> + default "landlock,lockdown,yama,loadpin,safesetid,tomoyo,ipe,bpf" if DEFAULT_SECURITY_TOMOYO >> + default "landlock,lockdown,yama,loadpin,safesetid,ipe,bpf" if DEFAULT_SECURITY_DAC >> + default "landlock,lockdown,yama,loadpin,safesetid,selinux,smack,tomoyo,apparmor,ipe,bpf" >> help >> A comma-separated list of LSMs, in initialization order. >> Any LSMs left off this list, except for those with order >> diff --git a/security/Makefile b/security/Makefile >> index 59f238490665..cc0982214b84 100644 >> --- a/security/Makefile >> +++ b/security/Makefile >> @@ -25,6 +25,7 @@ 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-$(CONFIG_INTEGRITY) += integrity/ >> diff --git a/security/ipe/Kconfig b/security/ipe/Kconfig >> new file mode 100644 >> index 000000000000..e4875fb04883 >> --- /dev/null >> +++ b/security/ipe/Kconfig >> @@ -0,0 +1,17 @@ >> +# SPDX-License-Identifier: GPL-2.0-only >> +# >> +# Integrity Policy Enforcement (IPE) configuration >> +# >> + >> +menuconfig SECURITY_IPE >> + bool "Integrity Policy Enforcement (IPE)" >> + depends on SECURITY && SECURITYFS >> + select PKCS7_MESSAGE_PARSER >> + select SYSTEM_DATA_VERIFICATION >> + help >> + This option enables the Integrity Policy Enforcement LSM >> + allowing users to define a policy to enforce a trust-based access >> + control. A key feature of IPE is a customizable policy to allow >> + admins to reconfigure trust requirements on the fly. >> + >> + If unsure, answer N. >> diff --git a/security/ipe/Makefile b/security/ipe/Makefile >> new file mode 100644 >> index 000000000000..f7a80d0f18f8 >> --- /dev/null >> +++ b/security/ipe/Makefile >> @@ -0,0 +1,9 @@ >> +# SPDX-License-Identifier: GPL-2.0 >> +# >> +# Copyright (C) Microsoft Corporation. All rights reserved. >> +# >> +# Makefile for building the IPE module as part of the kernel tree. >> +# >> + >> +obj-$(CONFIG_SECURITY_IPE) += \ >> + ipe.o \ >> diff --git a/security/ipe/ipe.c b/security/ipe/ipe.c >> new file mode 100644 >> index 000000000000..b013aed15e73 >> --- /dev/null >> +++ b/security/ipe/ipe.c >> @@ -0,0 +1,41 @@ >> +// SPDX-License-Identifier: GPL-2.0 >> +/* >> + * Copyright (C) Microsoft Corporation. All rights reserved. >> + */ >> +#include <uapi/linux/lsm.h> >> + >> +#include "ipe.h" >> + >> +static struct lsm_blob_sizes ipe_blobs __ro_after_init = { >> +}; >> + >> +static const struct lsm_id ipe_lsmid = { >> + .name = "ipe", >> + .id = LSM_ID_IPE, >> +}; >> + >> +static struct security_hook_list ipe_hooks[] __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 registers its hooks and loads the >> + * builtin boot policy. >> + * Return: >> + * * 0 - OK >> + * * -ENOMEM - Out of memory >> + */ >> +static int __init ipe_init(void) >> +{ >> + security_add_hooks(ipe_hooks, ARRAY_SIZE(ipe_hooks), &ipe_lsmid); >> + >> + return 0; >> +} >> + >> +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..a1c68d0fc2e0 >> --- /dev/null >> +++ b/security/ipe/ipe.h >> @@ -0,0 +1,16 @@ >> +/* SPDX-License-Identifier: GPL-2.0 */ >> +/* >> + * Copyright (C) Microsoft Corporation. All rights reserved. >> + */ >> + >> +#ifndef _IPE_H >> +#define _IPE_H >> + >> +#ifdef pr_fmt >> +#undef pr_fmt >> +#endif >> +#define pr_fmt(fmt) "IPE: " fmt >> + >> +#include <linux/lsm_hooks.h> >> + >> +#endif /* _IPE_H */ >> diff --git a/security/security.c b/security/security.c >> index 7035ee35a393..f168bc30a60d 100644 >> --- a/security/security.c >> +++ b/security/security.c >> @@ -51,7 +51,8 @@ >> (IS_ENABLED(CONFIG_SECURITY_SAFESETID) ? 1 : 0) + \ >> (IS_ENABLED(CONFIG_SECURITY_LOCKDOWN_LSM) ? 1 : 0) + \ >> (IS_ENABLED(CONFIG_BPF_LSM) ? 1 : 0) + \ >> - (IS_ENABLED(CONFIG_SECURITY_LANDLOCK) ? 1 : 0)) >> + (IS_ENABLED(CONFIG_SECURITY_LANDLOCK) ? 1 : 0) + \ >> + (IS_ENABLED(CONFIG_SECURITY_IPE) ? 1 : 0)) > > Hi Fan > > you would also need to update > tools/testing/selftests/lsm/lsm_list_modules_test.c. > > Roberto > >> /* >> * These are descriptions of the reasons that can be passed to the Hi Roberto, Thanks for the info. I will also update that file. -Fan
diff --git a/MAINTAINERS b/MAINTAINERS index 13158047f2af..8517011f88ff 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10650,6 +10650,13 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git F: security/integrity/ F: security/integrity/ima/ +INTEGRITY POLICY ENFORCEMENT (IPE) +M: Fan Wu <wufan@linux.microsoft.com> +L: linux-security-module@vger.kernel.org +S: Supported +T: git https://github.com/microsoft/ipe.git +F: security/ipe/ + INTEL 810/815 FRAMEBUFFER DRIVER M: Antonino Daplas <adaplas@gmail.com> L: linux-fbdev@vger.kernel.org diff --git a/include/uapi/linux/lsm.h b/include/uapi/linux/lsm.h index f8aef9ade549..43e2fb32745a 100644 --- a/include/uapi/linux/lsm.h +++ b/include/uapi/linux/lsm.h @@ -62,6 +62,7 @@ struct lsm_ctx { #define LSM_ID_LOCKDOWN 108 #define LSM_ID_BPF 109 #define LSM_ID_LANDLOCK 110 +#define LSM_ID_IPE 111 /* * LSM_ATTR_XXX definitions identify different LSM attributes diff --git a/security/Kconfig b/security/Kconfig index 52c9af08ad35..cc7adfbb6b96 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -194,6 +194,7 @@ source "security/yama/Kconfig" source "security/safesetid/Kconfig" source "security/lockdown/Kconfig" source "security/landlock/Kconfig" +source "security/ipe/Kconfig" source "security/integrity/Kconfig" @@ -233,11 +234,11 @@ endchoice config LSM string "Ordered list of enabled LSMs" - default "landlock,lockdown,yama,loadpin,safesetid,smack,selinux,tomoyo,apparmor,bpf" if DEFAULT_SECURITY_SMACK - default "landlock,lockdown,yama,loadpin,safesetid,apparmor,selinux,smack,tomoyo,bpf" if DEFAULT_SECURITY_APPARMOR - default "landlock,lockdown,yama,loadpin,safesetid,tomoyo,bpf" if DEFAULT_SECURITY_TOMOYO - default "landlock,lockdown,yama,loadpin,safesetid,bpf" if DEFAULT_SECURITY_DAC - default "landlock,lockdown,yama,loadpin,safesetid,selinux,smack,tomoyo,apparmor,bpf" + default "landlock,lockdown,yama,loadpin,safesetid,smack,selinux,tomoyo,apparmor,ipe,bpf" if DEFAULT_SECURITY_SMACK + default "landlock,lockdown,yama,loadpin,safesetid,apparmor,selinux,smack,tomoyo,ipe,bpf" if DEFAULT_SECURITY_APPARMOR + default "landlock,lockdown,yama,loadpin,safesetid,tomoyo,ipe,bpf" if DEFAULT_SECURITY_TOMOYO + default "landlock,lockdown,yama,loadpin,safesetid,ipe,bpf" if DEFAULT_SECURITY_DAC + default "landlock,lockdown,yama,loadpin,safesetid,selinux,smack,tomoyo,apparmor,ipe,bpf" help A comma-separated list of LSMs, in initialization order. Any LSMs left off this list, except for those with order diff --git a/security/Makefile b/security/Makefile index 59f238490665..cc0982214b84 100644 --- a/security/Makefile +++ b/security/Makefile @@ -25,6 +25,7 @@ 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..f7a80d0f18f8 --- /dev/null +++ b/security/ipe/Makefile @@ -0,0 +1,9 @@ +# 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) += \ + ipe.o \ diff --git a/security/ipe/ipe.c b/security/ipe/ipe.c new file mode 100644 index 000000000000..b013aed15e73 --- /dev/null +++ b/security/ipe/ipe.c @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) Microsoft Corporation. All rights reserved. + */ +#include <uapi/linux/lsm.h> + +#include "ipe.h" + +static struct lsm_blob_sizes ipe_blobs __ro_after_init = { +}; + +static const struct lsm_id ipe_lsmid = { + .name = "ipe", + .id = LSM_ID_IPE, +}; + +static struct security_hook_list ipe_hooks[] __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 registers its hooks and loads the + * builtin boot policy. + * Return: + * * 0 - OK + * * -ENOMEM - Out of memory + */ +static int __init ipe_init(void) +{ + security_add_hooks(ipe_hooks, ARRAY_SIZE(ipe_hooks), &ipe_lsmid); + + return 0; +} + +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..a1c68d0fc2e0 --- /dev/null +++ b/security/ipe/ipe.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) Microsoft Corporation. All rights reserved. + */ + +#ifndef _IPE_H +#define _IPE_H + +#ifdef pr_fmt +#undef pr_fmt +#endif +#define pr_fmt(fmt) "IPE: " fmt + +#include <linux/lsm_hooks.h> + +#endif /* _IPE_H */ diff --git a/security/security.c b/security/security.c index 7035ee35a393..f168bc30a60d 100644 --- a/security/security.c +++ b/security/security.c @@ -51,7 +51,8 @@ (IS_ENABLED(CONFIG_SECURITY_SAFESETID) ? 1 : 0) + \ (IS_ENABLED(CONFIG_SECURITY_LOCKDOWN_LSM) ? 1 : 0) + \ (IS_ENABLED(CONFIG_BPF_LSM) ? 1 : 0) + \ - (IS_ENABLED(CONFIG_SECURITY_LANDLOCK) ? 1 : 0)) + (IS_ENABLED(CONFIG_SECURITY_LANDLOCK) ? 1 : 0) + \ + (IS_ENABLED(CONFIG_SECURITY_IPE) ? 1 : 0)) /* * These are descriptions of the reasons that can be passed to the