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Add a twiddle to create PTY's with a biba/equal or mls/equal label

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instead of the default biba/high, mls/low, making it easier to use
ptys with these policies.  This isn't the final solution, but does
help.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
This commit is contained in:
Robert Watson 2002-10-21 04:15:40 +00:00
parent 803bf0837b
commit 0b9b85b91d
2 changed files with 18 additions and 0 deletions
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9
sys/security/mac_biba/mac_biba.c
View File

@ -102,6 +102,11 @@ SYSCTL_STRING(_security_mac_biba, OID_AUTO, trusted_interfaces, CTLFLAG_RD,
TUNABLE_STR("security.mac.biba.trusted_interfaces", trusted_interfaces,
sizeof(trusted_interfaces));
static int ptys_equal = 0;
SYSCTL_INT(_security_mac_biba, OID_AUTO, ptys_equal, CTLFLAG_RW,
&ptys_equal, 0, "Label pty devices as biba/equal on create");
TUNABLE_INT("security.mac.biba.ptys_equal", &ptys_equal);
static int mac_biba_revocation_enabled = 0;
SYSCTL_INT(_security_mac_biba, OID_AUTO, revocation_enabled, CTLFLAG_RW,
&mac_biba_revocation_enabled, 0, "Revoke access to objects on relabel");
@ -461,6 +466,10 @@ mac_biba_create_devfs_device(dev_t dev, struct devfs_dirent *devfs_dirent,
strcmp(dev->si_name, "random") == 0 ||
strncmp(dev->si_name, "fd/", strlen("fd/")) == 0)
biba_type = MAC_BIBA_TYPE_EQUAL;
else if (ptys_equal &&
(strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 ||
strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0))
biba_type = MAC_BIBA_TYPE_EQUAL;
else
biba_type = MAC_BIBA_TYPE_HIGH;
mac_biba_set_single(mac_biba, biba_type, 0);

9
sys/security/mac_mls/mac_mls.c
View File

@ -91,6 +91,11 @@ static int destroyed_not_inited;
SYSCTL_INT(_security_mac_mls, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
&destroyed_not_inited, 0, "Count of labels destroyed but not inited");
static int ptys_equal = 0;
SYSCTL_INT(_security_mac_mls, OID_AUTO, ptys_equal, CTLFLAG_RW,
&ptys_equal, 0, "Label pty devices as mls/equal on create");
TUNABLE_INT("security.mac.mls.ptys_equal", &ptys_equal);
static int mac_mls_revocation_enabled = 0;
SYSCTL_INT(_security_mac_mls, OID_AUTO, revocation_enabled, CTLFLAG_RW,
&mac_mls_revocation_enabled, 0, "Revoke access to objects on relabel");
@ -453,6 +458,10 @@ mac_mls_create_devfs_device(dev_t dev, struct devfs_dirent *devfs_dirent,
else if (strcmp(dev->si_name, "kmem") == 0 ||
strcmp(dev->si_name, "mem") == 0)
mls_type = MAC_MLS_TYPE_HIGH;
else if (ptys_equal &&
(strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 ||
strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0))
mls_type = MAC_MLS_TYPE_EQUAL;
else
mls_type = MAC_MLS_TYPE_LOW;
mac_mls_set_single(mac_mls, mls_type, 0);