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61 lines
2.7 KiB
61 lines
2.7 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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#ifndef _UAPI_LINUX_SECUREBITS_H |
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#define _UAPI_LINUX_SECUREBITS_H |
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/* Each securesetting is implemented using two bits. One bit specifies |
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whether the setting is on or off. The other bit specify whether the |
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setting is locked or not. A setting which is locked cannot be |
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changed from user-level. */ |
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#define issecure_mask(X) (1 << (X)) |
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#define SECUREBITS_DEFAULT 0x00000000 |
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/* When set UID 0 has no special privileges. When unset, we support |
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inheritance of root-permissions and suid-root executable under |
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compatibility mode. We raise the effective and inheritable bitmasks |
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*of the executable file* if the effective uid of the new process is |
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0. If the real uid is 0, we raise the effective (legacy) bit of the |
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executable file. */ |
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#define SECURE_NOROOT 0 |
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#define SECURE_NOROOT_LOCKED 1 /* make bit-0 immutable */ |
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#define SECBIT_NOROOT (issecure_mask(SECURE_NOROOT)) |
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#define SECBIT_NOROOT_LOCKED (issecure_mask(SECURE_NOROOT_LOCKED)) |
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/* When set, setuid to/from uid 0 does not trigger capability-"fixup". |
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When unset, to provide compatiblility with old programs relying on |
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set*uid to gain/lose privilege, transitions to/from uid 0 cause |
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capabilities to be gained/lost. */ |
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#define SECURE_NO_SETUID_FIXUP 2 |
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#define SECURE_NO_SETUID_FIXUP_LOCKED 3 /* make bit-2 immutable */ |
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#define SECBIT_NO_SETUID_FIXUP (issecure_mask(SECURE_NO_SETUID_FIXUP)) |
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#define SECBIT_NO_SETUID_FIXUP_LOCKED \ |
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(issecure_mask(SECURE_NO_SETUID_FIXUP_LOCKED)) |
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/* When set, a process can retain its capabilities even after |
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transitioning to a non-root user (the set-uid fixup suppressed by |
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bit 2). Bit-4 is cleared when a process calls exec(); setting both |
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bit 4 and 5 will create a barrier through exec that no exec()'d |
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child can use this feature again. */ |
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#define SECURE_KEEP_CAPS 4 |
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#define SECURE_KEEP_CAPS_LOCKED 5 /* make bit-4 immutable */ |
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#define SECBIT_KEEP_CAPS (issecure_mask(SECURE_KEEP_CAPS)) |
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#define SECBIT_KEEP_CAPS_LOCKED (issecure_mask(SECURE_KEEP_CAPS_LOCKED)) |
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/* When set, a process cannot add new capabilities to its ambient set. */ |
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#define SECURE_NO_CAP_AMBIENT_RAISE 6 |
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#define SECURE_NO_CAP_AMBIENT_RAISE_LOCKED 7 /* make bit-6 immutable */ |
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#define SECBIT_NO_CAP_AMBIENT_RAISE (issecure_mask(SECURE_NO_CAP_AMBIENT_RAISE)) |
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#define SECBIT_NO_CAP_AMBIENT_RAISE_LOCKED \ |
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(issecure_mask(SECURE_NO_CAP_AMBIENT_RAISE_LOCKED)) |
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#define SECURE_ALL_BITS (issecure_mask(SECURE_NOROOT) | \ |
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issecure_mask(SECURE_NO_SETUID_FIXUP) | \ |
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issecure_mask(SECURE_KEEP_CAPS) | \ |
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issecure_mask(SECURE_NO_CAP_AMBIENT_RAISE)) |
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#define SECURE_ALL_LOCKS (SECURE_ALL_BITS << 1) |
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#endif /* _UAPI_LINUX_SECUREBITS_H */
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