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Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

Browse Source 
Pull security subsystem updates from James Morris:
 "Nothing groundbreaking for this kernel, just cleanups and fixes, and a
  couple of Smack enhancements."

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (21 commits)
  Smack: Maintainer Record
  Smack: don't show empty rules when /smack/load or /smack/load2 is read
  Smack: user access check bounds
  Smack: onlycap limits on CAP_MAC_ADMIN
  Smack: fix smack_new_inode bogosities
  ima: audit is compiled only when enabled
  ima: ima_initialized is set only if successful
  ima: add policy for pseudo fs
  ima: remove unused cleanup functions
  ima: free securityfs violations file
  ima: use full pathnames in measurement list
  security: Fix nommu build.
  samples: seccomp: add .gitignore for untracked executables
  tpm: check the chip reference before using it
  TPM: fix memleak when register hardware fails
  TPM: chip disabled state erronously being reported as error
  MAINTAINERS: TPM maintainers' contacts update
  Merge branches 'next-queue' and 'next' into next
  Remove unused code from MPI library
  Revert "crypto: GnuPG based MPI lib - additional sources (part 4)"
  ...
This commit is contained in:
Linus Torvalds 2012-07-23 18:49:06 -07:00
commit e05644e17e
38 changed files with 153 additions and 2168 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
MAINTAINERS
View File

@ -6230,6 +6230,15 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
F: include/linux/srcu*
F: kernel/srcu*
SMACK SECURITY MODULE
M: Casey Schaufler <casey@schaufler-ca.com>
L: linux-security-module@vger.kernel.org
W: http://schaufler-ca.com
T: git git://git.gitorious.org/smack-next/kernel.git
S: Maintained
F: Documentation/security/Smack.txt
F: security/smack/
SMC91x ETHERNET DRIVER
M: Nicolas Pitre <nico@fluxnic.net>
S: Odd Fixes
@ -6862,10 +6871,11 @@ F: include/linux/shmem_fs.h
F: mm/shmem.c
TPM DEVICE DRIVER
M: Debora Velarde <debora@linux.vnet.ibm.com>
M: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
M: Kent Yoder <key@linux.vnet.ibm.com>
M: Rajiv Andrade <mail@srajiv.net>
W: http://tpmdd.sourceforge.net
M: Marcel Selhorst <m.selhorst@sirrix.com>
M: Marcel Selhorst <tpmdd@selhorst.net>
M: Sirrix AG <tpmdd@sirrix.com>
W: http://www.sirrix.com
L: tpmdd-devel@lists.sourceforge.net (moderated for non-subscribers)
S: Maintained

27
drivers/char/tpm/tpm.c
View File

@ -827,10 +827,10 @@ EXPORT_SYMBOL_GPL(tpm_pcr_extend);
int tpm_do_selftest(struct tpm_chip *chip)
{
int rc;
u8 digest[TPM_DIGEST_SIZE];
unsigned int loops;
unsigned int delay_msec = 1000;
unsigned long duration;
struct tpm_cmd_t cmd;
duration = tpm_calc_ordinal_duration(chip,
TPM_ORD_CONTINUE_SELFTEST);
@ -845,7 +845,15 @@ int tpm_do_selftest(struct tpm_chip *chip)
return rc;
do {
rc = __tpm_pcr_read(chip, 0, digest);
/* Attempt to read a PCR value */
cmd.header.in = pcrread_header;
cmd.params.pcrread_in.pcr_idx = cpu_to_be32(0);
rc = tpm_transmit(chip, (u8 *) &cmd, READ_PCR_RESULT_SIZE);
if (rc < TPM_HEADER_SIZE)
return -EFAULT;
rc = be32_to_cpu(cmd.header.out.return_code);
if (rc == TPM_ERR_DISABLED || rc == TPM_ERR_DEACTIVATED) {
dev_info(chip->dev,
"TPM is disabled/deactivated (0x%X)\n", rc);
@ -1322,6 +1330,9 @@ EXPORT_SYMBOL_GPL(tpm_pm_resume);
void tpm_dev_vendor_release(struct tpm_chip *chip)
{
if (!chip)
return;
if (chip->vendor.release)
chip->vendor.release(chip->dev);
@ -1339,6 +1350,9 @@ void tpm_dev_release(struct device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(dev);
if (!chip)
return;
tpm_dev_vendor_release(chip);
chip->release(dev);
@ -1405,15 +1419,12 @@ struct tpm_chip *tpm_register_hardware(struct device *dev,
"unable to misc_register %s, minor %d\n",
chip->vendor.miscdev.name,
chip->vendor.miscdev.minor);
put_device(chip->dev);
return NULL;
goto put_device;
}
if (sysfs_create_group(&dev->kobj, chip->vendor.attr_group)) {
misc_deregister(&chip->vendor.miscdev);
put_device(chip->dev);
return NULL;
goto put_device;
}
chip->bios_dir = tpm_bios_log_setup(devname);
@ -1425,6 +1436,8 @@ struct tpm_chip *tpm_register_hardware(struct device *dev,
return chip;
put_device:
put_device(chip->dev);
out_free:
kfree(chip);
kfree(devname);

6
drivers/char/tpm/tpm_infineon.c
View File

@ -4,8 +4,8 @@
* SLD 9630 TT 1.1 and SLB 9635 TT 1.2 Trusted Platform Module
* Specifications at www.trustedcomputinggroup.org
*
* Copyright (C) 2005, Marcel Selhorst <m.selhorst@sirrix.com>
* Sirrix AG - security technologies, http://www.sirrix.com and
* Copyright (C) 2005, Marcel Selhorst <tpmdd@selhorst.net>
* Sirrix AG - security technologies <tpmdd@sirrix.com> and
* Applied Data Security Group, Ruhr-University Bochum, Germany
* Project-Homepage: http://www.trust.rub.de/projects/linux-device-driver-infineon-tpm/
*
@ -671,7 +671,7 @@ static void __exit cleanup_inf(void)
module_init(init_inf);
module_exit(cleanup_inf);
MODULE_AUTHOR("Marcel Selhorst <m.selhorst@sirrix.com>");
MODULE_AUTHOR("Marcel Selhorst <tpmdd@sirrix.com>");
MODULE_DESCRIPTION("Driver for Infineon TPM SLD 9630 TT 1.1 / SLB 9635 TT 1.2");
MODULE_VERSION("1.9.2");
MODULE_LICENSE("GPL");

8
lib/Kconfig
View File

@ -378,14 +378,6 @@ config MPILIB
It is used to implement RSA digital signature verification,
which is used by IMA/EVM digital signature extension.
config MPILIB_EXTRA
bool
depends on MPILIB
help
Additional sources of multiprecision maths library from GnuPG.
This code is unnecessary for RSA digital signature verification,
but can be compiled if needed.
config SIGNATURE
tristate
depends on KEYS && CRYPTO

11
lib/mpi/Makefile
View File

@ -19,14 +19,3 @@ mpi-y = \
mpih-mul.o \
mpi-pow.o \
mpiutil.o
mpi-$(CONFIG_MPILIB_EXTRA) += \
mpi-add.o \
mpi-div.o \
mpi-cmp.o \
mpi-gcd.o \
mpi-inline.o \
mpi-inv.o \
mpi-mpow.o \
mpi-mul.o \
mpi-scan.o

4
lib/mpi/generic_mpi-asm-defs.h
View File

@ -1,4 +0,0 @@
/* This file defines some basic constants for the MPI machinery. We
* need to define the types on a per-CPU basis, so it is done with
* this file here. */
#define BYTES_PER_MPI_LIMB (SIZEOF_UNSIGNED_LONG)

234
lib/mpi/mpi-add.c
View File

@ -1,234 +0,0 @@
/* mpi-add.c - MPI functions
* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
* Copyright (C) 1994, 1996 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
* Note: This code is heavily based on the GNU MP Library.
* Actually it's the same code with only minor changes in the
* way the data is stored; this is to support the abstraction
* of an optional secure memory allocation which may be used
* to avoid revealing of sensitive data due to paging etc.
* The GNU MP Library itself is published under the LGPL;
* however I decided to publish this code under the plain GPL.
*/
#include "mpi-internal.h"
/****************
* Add the unsigned integer V to the mpi-integer U and store the
* result in W. U and V may be the same.
*/
int mpi_add_ui(MPI w, const MPI u, unsigned long v)
{
mpi_ptr_t wp, up;
mpi_size_t usize, wsize;
int usign, wsign;
usize = u->nlimbs;
usign = u->sign;
wsign = 0;
/* If not space for W (and possible carry), increase space. */
wsize = usize + 1;
if (w->alloced < wsize)
if (mpi_resize(w, wsize) < 0)
return -ENOMEM;
/* These must be after realloc (U may be the same as W). */
up = u->d;
wp = w->d;
if (!usize) { /* simple */
wp[0] = v;
wsize = v ? 1 : 0;
} else if (!usign) { /* mpi is not negative */
mpi_limb_t cy;
cy = mpihelp_add_1(wp, up, usize, v);
wp[usize] = cy;
wsize = usize + cy;
} else { /* The signs are different. Need exact comparison to determine
* which operand to subtract from which. */
if (usize == 1 && up[0] < v) {
wp[0] = v - up[0];
wsize = 1;
} else {
mpihelp_sub_1(wp, up, usize, v);
/* Size can decrease with at most one limb. */
wsize = usize - (wp[usize - 1] == 0);
wsign = 1;
}
}
w->nlimbs = wsize;
w->sign = wsign;
return 0;
}
int mpi_add(MPI w, MPI u, MPI v)
{
mpi_ptr_t wp, up, vp;
mpi_size_t usize, vsize, wsize;
int usign, vsign, wsign;
if (u->nlimbs < v->nlimbs) { /* Swap U and V. */
usize = v->nlimbs;
usign = v->sign;
vsize = u->nlimbs;
vsign = u->sign;
wsize = usize + 1;
if (RESIZE_IF_NEEDED(w, wsize) < 0)
return -ENOMEM;
/* These must be after realloc (u or v may be the same as w). */
up = v->d;
vp = u->d;
} else {
usize = u->nlimbs;
usign = u->sign;
vsize = v->nlimbs;
vsign = v->sign;
wsize = usize + 1;
if (RESIZE_IF_NEEDED(w, wsize) < 0)
return -ENOMEM;
/* These must be after realloc (u or v may be the same as w). */
up = u->d;
vp = v->d;
}
wp = w->d;
wsign = 0;
if (!vsize) { /* simple */
MPN_COPY(wp, up, usize);
wsize = usize;
wsign = usign;
} else if (usign != vsign) { /* different sign */
/* This test is right since USIZE >= VSIZE */
if (usize != vsize) {
mpihelp_sub(wp, up, usize, vp, vsize);
wsize = usize;
MPN_NORMALIZE(wp, wsize);
wsign = usign;
} else if (mpihelp_cmp(up, vp, usize) < 0) {
mpihelp_sub_n(wp, vp, up, usize);
wsize = usize;
MPN_NORMALIZE(wp, wsize);
if (!usign)
wsign = 1;
} else {
mpihelp_sub_n(wp, up, vp, usize);
wsize = usize;
MPN_NORMALIZE(wp, wsize);
if (usign)
wsign = 1;
}
} else { /* U and V have same sign. Add them. */
mpi_limb_t cy = mpihelp_add(wp, up, usize, vp, vsize);
wp[usize] = cy;
wsize = usize + cy;
if (usign)
wsign = 1;
}
w->nlimbs = wsize;
w->sign = wsign;
return 0;
}
/****************
* Subtract the unsigned integer V from the mpi-integer U and store the
* result in W.
*/
int mpi_sub_ui(MPI w, MPI u, unsigned long v)
{
mpi_ptr_t wp, up;
mpi_size_t usize, wsize;
int usign, wsign;
usize = u->nlimbs;
usign = u->sign;
wsign = 0;
/* If not space for W (and possible carry), increase space. */
wsize = usize + 1;
if (w->alloced < wsize)
if (mpi_resize(w, wsize) < 0)
return -ENOMEM;
/* These must be after realloc (U may be the same as W). */
up = u->d;
wp = w->d;
if (!usize) { /* simple */
wp[0] = v;
wsize = v ? 1 : 0;
wsign = 1;
} else if (usign) { /* mpi and v are negative */
mpi_limb_t cy;
cy = mpihelp_add_1(wp, up, usize, v);
wp[usize] = cy;
wsize = usize + cy;
} else { /* The signs are different. Need exact comparison to determine
* which operand to subtract from which. */
if (usize == 1 && up[0] < v) {
wp[0] = v - up[0];
wsize = 1;
wsign = 1;
} else {
mpihelp_sub_1(wp, up, usize, v);
/* Size can decrease with at most one limb. */
wsize = usize - (wp[usize - 1] == 0);
}
}
w->nlimbs = wsize;
w->sign = wsign;
return 0;
}
int mpi_sub(MPI w, MPI u, MPI v)
{
int rc;
if (w == v) {
MPI vv;
if (mpi_copy(&vv, v) < 0)
return -ENOMEM;
vv->sign = !vv->sign;
rc = mpi_add(w, u, vv);
mpi_free(vv);
} else {
/* fixme: this is not thread-save (we temp. modify v) */
v->sign = !v->sign;
rc = mpi_add(w, u, v);
v->sign = !v->sign;
}
return rc;
}
int mpi_addm(MPI w, MPI u, MPI v, MPI m)
{
if (mpi_add(w, u, v) < 0 || mpi_fdiv_r(w, w, m) < 0)
return -ENOMEM;
return 0;
}
int mpi_subm(MPI w, MPI u, MPI v, MPI m)
{
if (mpi_sub(w, u, v) < 0 || mpi_fdiv_r(w, w, m) < 0)
return -ENOMEM;
return 0;
}

162
lib/mpi/mpi-bit.c
View File

@ -54,165 +54,3 @@ unsigned mpi_get_nbits(MPI a)
return n;
}
EXPORT_SYMBOL_GPL(mpi_get_nbits);
/****************
* Test whether bit N is set.
*/
int mpi_test_bit(MPI a, unsigned n)
{
unsigned limbno, bitno;
mpi_limb_t limb;
limbno = n / BITS_PER_MPI_LIMB;
bitno = n % BITS_PER_MPI_LIMB;
if (limbno >= a->nlimbs)
return 0; /* too far left: this is a 0 */
limb = a->d[limbno];
return (limb & (A_LIMB_1 << bitno)) ? 1 : 0;
}
/****************
* Set bit N of A.
*/
int mpi_set_bit(MPI a, unsigned n)
{
unsigned limbno, bitno;
limbno = n / BITS_PER_MPI_LIMB;
bitno = n % BITS_PER_MPI_LIMB;
if (limbno >= a->nlimbs) { /* resize */
if (a->alloced >= limbno)
if (mpi_resize(a, limbno + 1) < 0)
return -ENOMEM;
a->nlimbs = limbno + 1;
}
a->d[limbno] |= (A_LIMB_1 << bitno);
return 0;
}
/****************
* Set bit N of A. and clear all bits above
*/
int mpi_set_highbit(MPI a, unsigned n)
{
unsigned limbno, bitno;
limbno = n / BITS_PER_MPI_LIMB;
bitno = n % BITS_PER_MPI_LIMB;
if (limbno >= a->nlimbs) { /* resize */
if (a->alloced >= limbno)
if (mpi_resize(a, limbno + 1) < 0)
return -ENOMEM;
a->nlimbs = limbno + 1;
}
a->d[limbno] |= (A_LIMB_1 << bitno);
for (bitno++; bitno < BITS_PER_MPI_LIMB; bitno++)
a->d[limbno] &= ~(A_LIMB_1 << bitno);
a->nlimbs = limbno + 1;
return 0;
}
/****************
* clear bit N of A and all bits above
*/
void mpi_clear_highbit(MPI a, unsigned n)
{
unsigned limbno, bitno;
limbno = n / BITS_PER_MPI_LIMB;
bitno = n % BITS_PER_MPI_LIMB;
if (limbno >= a->nlimbs)
return; /* not allocated, so need to clear bits :-) */
for (; bitno < BITS_PER_MPI_LIMB; bitno++)
a->d[limbno] &= ~(A_LIMB_1 << bitno);
a->nlimbs = limbno + 1;
}
/****************
* Clear bit N of A.
*/
void mpi_clear_bit(MPI a, unsigned n)
{
unsigned limbno, bitno;
limbno = n / BITS_PER_MPI_LIMB;
bitno = n % BITS_PER_MPI_LIMB;
if (limbno >= a->nlimbs)
return; /* don't need to clear this bit, it's to far to left */
a->d[limbno] &= ~(A_LIMB_1 << bitno);
}
/****************
* Shift A by N bits to the right
* FIXME: should use alloc_limb if X and A are same.
*/
int mpi_rshift(MPI x, MPI a, unsigned n)
{
mpi_ptr_t xp;
mpi_size_t xsize;
xsize = a->nlimbs;
x->sign = a->sign;
if (RESIZE_IF_NEEDED(x, (size_t) xsize) < 0)
return -ENOMEM;
xp = x->d;
if (xsize) {
mpihelp_rshift(xp, a->d, xsize, n);
MPN_NORMALIZE(xp, xsize);
}
x->nlimbs = xsize;
return 0;
}
/****************
* Shift A by COUNT limbs to the left
* This is used only within the MPI library
*/
int mpi_lshift_limbs(MPI a, unsigned int count)
{
const int n = a->nlimbs;
mpi_ptr_t ap;
int i;
if (!count || !n)
return 0;
if (RESIZE_IF_NEEDED(a, n + count) < 0)
return -ENOMEM;
ap = a->d;
for (i = n - 1; i >= 0; i--)
ap[i + count] = ap[i];
for (i = 0; i < count; i++)
ap[i] = 0;
a->nlimbs += count;
return 0;
}
/****************
* Shift A by COUNT limbs to the right
* This is used only within the MPI library
*/
void mpi_rshift_limbs(MPI a, unsigned int count)
{
mpi_ptr_t ap = a->d;
mpi_size_t n = a->nlimbs;
unsigned int i;
if (count >= n) {
a->nlimbs = 0;
return;
}
for (i = 0; i < n - count; i++)
ap[i] = ap[i + count];
ap[i] = 0;
a->nlimbs -= count;
}

68
lib/mpi/mpi-cmp.c
View File

@ -1,68 +0,0 @@
/* mpi-cmp.c - MPI functions
* Copyright (C) 1998, 1999 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include "mpi-internal.h"
int mpi_cmp_ui(MPI u, unsigned long v)
{
mpi_limb_t limb = v;
mpi_normalize(u);
if (!u->nlimbs && !limb)
return 0;
if (u->sign)
return -1;
if (u->nlimbs > 1)
return 1;
if (u->d[0] == limb)
return 0;
else if (u->d[0] > limb)
return 1;
else
return -1;
}
int mpi_cmp(MPI u, MPI v)
{
mpi_size_t usize, vsize;
int cmp;
mpi_normalize(u);
mpi_normalize(v);
usize = u->nlimbs;
vsize = v->nlimbs;
if (!u->sign && v->sign)
return 1;
if (u->sign && !v->sign)
return -1;
if (usize != vsize && !u->sign && !v->sign)
return usize - vsize;
if (usize != vsize && u->sign && v->sign)
return vsize + usize;
if (!usize)
return 0;
cmp = mpihelp_cmp(u->d, v->d, usize);
if (!cmp)
return 0;
if ((cmp < 0 ? 1 : 0) == (u->sign ? 1 : 0))
return 1;
return -1;
}

338
lib/mpi/mpi-div.c
View File

@ -1,338 +0,0 @@
/* mpi-div.c - MPI functions
* Copyright (C) 1994, 1996 Free Software Foundation, Inc.
* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
* Note: This code is heavily based on the GNU MP Library.
* Actually it's the same code with only minor changes in the
* way the data is stored; this is to support the abstraction
* of an optional secure memory allocation which may be used
* to avoid revealing of sensitive data due to paging etc.
* The GNU MP Library itself is published under the LGPL;
* however I decided to publish this code under the plain GPL.
*/
#include <linux/string.h>
#include "mpi-internal.h"
#include "longlong.h"
int mpi_fdiv_r(MPI rem, MPI dividend, MPI divisor)
{
int rc = -ENOMEM;
int divisor_sign = divisor->sign;
MPI temp_divisor = NULL;
/* We need the original value of the divisor after the remainder has been
* preliminary calculated. We have to copy it to temporary space if it's
* the same variable as REM. */
if (rem == divisor) {
if (mpi_copy(&temp_divisor, divisor) < 0)
goto nomem;
divisor = temp_divisor;
}
if (mpi_tdiv_qr(NULL, rem, dividend, divisor) < 0)
goto nomem;
if (((divisor_sign ? 1 : 0) ^ (dividend->sign ? 1 : 0)) && rem->nlimbs)
if (mpi_add(rem, rem, divisor) < 0)
goto nomem;
rc = 0;
nomem:
if (temp_divisor)
mpi_free(temp_divisor);
return rc;
}
/****************
* Division rounding the quotient towards -infinity.
* The remainder gets the same sign as the denominator.
* rem is optional
*/
ulong mpi_fdiv_r_ui(MPI rem, MPI dividend, ulong divisor)
{
mpi_limb_t rlimb;
rlimb = mpihelp_mod_1(dividend->d, dividend->nlimbs, divisor);
if (rlimb && dividend->sign)
rlimb = divisor - rlimb;
if (rem) {
rem->d[0] = rlimb;
rem->nlimbs = rlimb ? 1 : 0;
}
return rlimb;
}
int mpi_fdiv_q(MPI quot, MPI dividend, MPI divisor)
{
MPI tmp = mpi_alloc(mpi_get_nlimbs(quot));
if (!tmp)
return -ENOMEM;
mpi_fdiv_qr(quot, tmp, dividend, divisor);
mpi_free(tmp);
return 0;
}
int mpi_fdiv_qr(MPI quot, MPI rem, MPI dividend, MPI divisor)
{
int divisor_sign = divisor->sign;
MPI temp_divisor = NULL;
if (quot == divisor || rem == divisor) {
if (mpi_copy(&temp_divisor, divisor) < 0)
return -ENOMEM;
divisor = temp_divisor;
}
if (mpi_tdiv_qr(quot, rem, dividend, divisor) < 0)
goto nomem;
if ((divisor_sign ^ dividend->sign) && rem->nlimbs) {
if (mpi_sub_ui(quot, quot, 1) < 0)
goto nomem;
if (mpi_add(rem, rem, divisor) < 0)
goto nomem;
}
if (temp_divisor)
mpi_free(temp_divisor);
return 0;
nomem:
mpi_free(temp_divisor);
return -ENOMEM;
}
/* If den == quot, den needs temporary storage.
* If den == rem, den needs temporary storage.
* If num == quot, num needs temporary storage.
* If den has temporary storage, it can be normalized while being copied,
* i.e no extra storage should be allocated.
*/
int mpi_tdiv_r(MPI rem, MPI num, MPI den)
{
return mpi_tdiv_qr(NULL, rem, num, den);
}
int mpi_tdiv_qr(MPI quot, MPI rem, MPI num, MPI den)
{
int rc = -ENOMEM;
mpi_ptr_t np, dp;
mpi_ptr_t qp, rp;
mpi_size_t nsize = num->nlimbs;
mpi_size_t dsize = den->nlimbs;
mpi_size_t qsize, rsize;
mpi_size_t sign_remainder = num->sign;
mpi_size_t sign_quotient = num->sign ^ den->sign;
unsigned normalization_steps;
mpi_limb_t q_limb;
mpi_ptr_t marker[5];
int markidx = 0;
if (!dsize)
return -EINVAL;
memset(marker, 0, sizeof(marker));
/* Ensure space is enough for quotient and remainder.
* We need space for an extra limb in the remainder, because it's
* up-shifted (normalized) below. */
rsize = nsize + 1;
if (mpi_resize(rem, rsize) < 0)
goto nomem;
qsize = rsize - dsize; /* qsize cannot be bigger than this. */
if (qsize <= 0) {
if (num != rem) {
rem->nlimbs = num->nlimbs;
rem->sign = num->sign;
MPN_COPY(rem->d, num->d, nsize);
}
if (quot) {
/* This needs to follow the assignment to rem, in case the
* numerator and quotient are the same. */
quot->nlimbs = 0;
quot->sign = 0;
}
return 0;
}
if (quot)
if (mpi_resize(quot, qsize) < 0)
goto nomem;
/* Read pointers here, when reallocation is finished. */
np = num->d;
dp = den->d;
rp = rem->d;
/* Optimize division by a single-limb divisor. */
if (dsize == 1) {
mpi_limb_t rlimb;
if (quot) {
qp = quot->d;
rlimb = mpihelp_divmod_1(qp, np, nsize, dp[0]);
qsize -= qp[qsize - 1] == 0;
quot->nlimbs = qsize;
quot->sign = sign_quotient;
} else
rlimb = mpihelp_mod_1(np, nsize, dp[0]);
rp[0] = rlimb;
rsize = rlimb != 0 ? 1 : 0;
rem->nlimbs = rsize;
rem->sign = sign_remainder;
return 0;
}
if (quot) {
qp = quot->d;
/* Make sure QP and NP point to different objects. Otherwise the
* numerator would be gradually overwritten by the quotient limbs. */
if (qp == np) { /* Copy NP object to temporary space. */
np = marker[markidx++] = mpi_alloc_limb_space(nsize);
if (!np)
goto nomem;
MPN_COPY(np, qp, nsize);
}
} else /* Put quotient at top of remainder. */
qp = rp + dsize;
count_leading_zeros(normalization_steps, dp[dsize - 1]);
/* Normalize the denominator, i.e. make its most significant bit set by
* shifting it NORMALIZATION_STEPS bits to the left. Also shift the
* numerator the same number of steps (to keep the quotient the same!).
*/
if (normalization_steps) {
mpi_ptr_t tp;
mpi_limb_t nlimb;
/* Shift up the denominator setting the most significant bit of
* the most significant word. Use temporary storage not to clobber
* the original contents of the denominator. */
tp = marker[markidx++] = mpi_alloc_limb_space(dsize);
if (!tp)
goto nomem;
mpihelp_lshift(tp, dp, dsize, normalization_steps);
dp = tp;
/* Shift up the numerator, possibly introducing a new most
* significant word. Move the shifted numerator in the remainder
* meanwhile. */
nlimb = mpihelp_lshift(rp, np, nsize, normalization_steps);
if (nlimb) {
rp[nsize] = nlimb;
rsize = nsize + 1;
} else
rsize = nsize;
} else {
/* The denominator is already normalized, as required. Copy it to
* temporary space if it overlaps with the quotient or remainder. */
if (dp == rp || (quot && (dp == qp))) {
mpi_ptr_t tp;
tp = marker[markidx++] = mpi_alloc_limb_space(dsize);
if (!tp)
goto nomem;
MPN_COPY(tp, dp, dsize);
dp = tp;
}
/* Move the numerator to the remainder. */
if (rp != np)
MPN_COPY(rp, np, nsize);
rsize = nsize;
}
q_limb = mpihelp_divrem(qp, 0, rp, rsize, dp, dsize);
if (quot) {
qsize = rsize - dsize;
if (q_limb) {
qp[qsize] = q_limb;
qsize += 1;
}
quot->nlimbs = qsize;
quot->sign = sign_quotient;
}
rsize = dsize;
MPN_NORMALIZE(rp, rsize);
if (normalization_steps && rsize) {
mpihelp_rshift(rp, rp, rsize, normalization_steps);
rsize -= rp[rsize - 1] == 0 ? 1 : 0;
}
rem->nlimbs = rsize;
rem->sign = sign_remainder;
rc = 0;
nomem:
while (markidx)
mpi_free_limb_space(marker[--markidx]);
return rc;
}
int mpi_tdiv_q_2exp(MPI w, MPI u, unsigned count)
{
mpi_size_t usize, wsize;
mpi_size_t limb_cnt;
usize = u->nlimbs;
limb_cnt = count / BITS_PER_MPI_LIMB;
wsize = usize - limb_cnt;
if (limb_cnt >= usize)
w->nlimbs = 0;
else {
mpi_ptr_t wp;
mpi_ptr_t up;
if (RESIZE_IF_NEEDED(w, wsize) < 0)
return -ENOMEM;
wp = w->d;
up = u->d;
count %= BITS_PER_MPI_LIMB;
if (count) {
mpihelp_rshift(wp, up + limb_cnt, wsize, count);
wsize -= !wp[wsize - 1];
} else {
MPN_COPY_INCR(wp, up + limb_cnt, wsize);
}
w->nlimbs = wsize;
}
return 0;
}
/****************
* Check whether dividend is divisible by divisor
* (note: divisor must fit into a limb)
*/
int mpi_divisible_ui(MPI dividend, ulong divisor)
{
return !mpihelp_mod_1(dividend->d, dividend->nlimbs, divisor);
}

59
lib/mpi/mpi-gcd.c
View File

@ -1,59 +0,0 @@
/* mpi-gcd.c - MPI functions
* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include "mpi-internal.h"
/****************
* Find the greatest common divisor G of A and B.
* Return: true if this 1, false in all other cases
*/
int mpi_gcd(MPI g, const MPI xa, const MPI xb)
{
MPI a = NULL, b = NULL;
if (mpi_copy(&a, xa) < 0)
goto nomem;
if (mpi_copy(&b, xb) < 0)
goto nomem;
/* TAOCP Vol II, 4.5.2, Algorithm A */
a->sign = 0;
b->sign = 0;
while (mpi_cmp_ui(b, 0)) {
if (mpi_fdiv_r(g, a, b) < 0) /* g used as temorary variable */
goto nomem;
if (mpi_set(a, b) < 0)
goto nomem;
if (mpi_set(b, g) < 0)
goto nomem;
}
if (mpi_set(g, a) < 0)
goto nomem;
mpi_free(a);
mpi_free(b);
return !mpi_cmp_ui(g, 1);
nomem:
mpi_free(a);
mpi_free(b);
return -ENOMEM;
}

31
lib/mpi/mpi-inline.c
View File

@ -1,31 +0,0 @@
/* mpi-inline.c
* Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
/* put the inline functions as real functions into the lib */
#define G10_MPI_INLINE_DECL
#include "mpi-internal.h"
/* always include the header becuase it is only
* included by mpi-internal if __GCC__ is defined but we
* need it here in all cases and the above definition of
* of the macro allows us to do so
*/
#include "mpi-inline.h"

187
lib/mpi/mpi-inv.c
View File

@ -1,187 +0,0 @@
/* mpi-inv.c - MPI functions
* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include "mpi-internal.h"
/****************
* Calculate the multiplicative inverse X of A mod N
* That is: Find the solution x for
* 1 = (a*x) mod n
*/
int mpi_invm(MPI x, const MPI a, const MPI n)
{
/* Extended Euclid's algorithm (See TAOPC Vol II, 4.5.2, Alg X)
* modified according to Michael Penk's solution for Exercice 35
* with further enhancement */
MPI u = NULL, v = NULL;
MPI u1 = NULL, u2 = NULL, u3 = NULL;
MPI v1 = NULL, v2 = NULL, v3 = NULL;
MPI t1 = NULL, t2 = NULL, t3 = NULL;
unsigned k;
int sign;
int odd = 0;
int rc = -ENOMEM;
if (mpi_copy(&u, a) < 0)
goto cleanup;
if (mpi_copy(&v, n) < 0)
goto cleanup;
for (k = 0; !mpi_test_bit(u, 0) && !mpi_test_bit(v, 0); k++) {
if (mpi_rshift(u, u, 1) < 0)
goto cleanup;
if (mpi_rshift(v, v, 1) < 0)
goto cleanup;
}
odd = mpi_test_bit(v, 0);
u1 = mpi_alloc_set_ui(1);
if (!u1)
goto cleanup;
if (!odd) {
u2 = mpi_alloc_set_ui(0);
if (!u2)
goto cleanup;
}
if (mpi_copy(&u3, u) < 0)
goto cleanup;
if (mpi_copy(&v1, v) < 0)
goto cleanup;
if (!odd) {
v2 = mpi_alloc(mpi_get_nlimbs(u));
if (!v2)
goto cleanup;
if (mpi_sub(v2, u1, u) < 0)
goto cleanup; /* U is used as const 1 */
}
if (mpi_copy(&v3, v) < 0)
goto cleanup;
if (mpi_test_bit(u, 0)) { /* u is odd */
t1 = mpi_alloc_set_ui(0);
if (!t1)
goto cleanup;
if (!odd) {
t2 = mpi_alloc_set_ui(1);
if (!t2)
goto cleanup;
t2->sign = 1;
}
if (mpi_copy(&t3, v) < 0)
goto cleanup;
t3->sign = !t3->sign;
goto Y4;
} else {
t1 = mpi_alloc_set_ui(1);
if (!t1)
goto cleanup;
if (!odd) {
t2 = mpi_alloc_set_ui(0);
if (!t2)
goto cleanup;
}
if (mpi_copy(&t3, u) < 0)
goto cleanup;
}
do {
do {
if (!odd) {
if (mpi_test_bit(t1, 0) || mpi_test_bit(t2, 0)) { /* one is odd */
if (mpi_add(t1, t1, v) < 0)
goto cleanup;
if (mpi_sub(t2, t2, u) < 0)
goto cleanup;
}
if (mpi_rshift(t1, t1, 1) < 0)
goto cleanup;
if (mpi_rshift(t2, t2, 1) < 0)
goto cleanup;
if (mpi_rshift(t3, t3, 1) < 0)
goto cleanup;
} else {
if (mpi_test_bit(t1, 0))
if (mpi_add(t1, t1, v) < 0)
goto cleanup;
if (mpi_rshift(t1, t1, 1) < 0)
goto cleanup;
if (mpi_rshift(t3, t3, 1) < 0)
goto cleanup;
}
Y4:
;
} while (!mpi_test_bit(t3, 0)); /* while t3 is even */
if (!t3->sign) {
if (mpi_set(u1, t1) < 0)
goto cleanup;
if (!odd)
if (mpi_set(u2, t2) < 0)
goto cleanup;
if (mpi_set(u3, t3) < 0)
goto cleanup;
} else {
if (mpi_sub(v1, v, t1) < 0)
goto cleanup;
sign = u->sign;
u->sign = !u->sign;
if (!odd)
if (mpi_sub(v2, u, t2) < 0)
goto cleanup;
u->sign = sign;
sign = t3->sign;
t3->sign = !t3->sign;
if (mpi_set(v3, t3) < 0)
goto cleanup;
t3->sign = sign;
}
if (mpi_sub(t1, u1, v1) < 0)
goto cleanup;
if (!odd)
if (mpi_sub(t2, u2, v2) < 0)
goto cleanup;
if (mpi_sub(t3, u3, v3) < 0)
goto cleanup;
if (t1->sign) {
if (mpi_add(t1, t1, v) < 0)
goto cleanup;
if (!odd)
if (mpi_sub(t2, t2, u) < 0)
goto cleanup;
}
} while (mpi_cmp_ui(t3, 0)); /* while t3 != 0 */
/* mpi_lshift( u3, k ); */
rc = mpi_set(x, u1);
cleanup:
mpi_free(u1);
mpi_free(v1);
mpi_free(t1);
if (!odd) {
mpi_free(u2);
mpi_free(v2);
mpi_free(t2);
}
mpi_free(u3);
mpi_free(v3);
mpi_free(t3);
mpi_free(u);
mpi_free(v);
return rc;
}

134
lib/mpi/mpi-mpow.c
View File

@ -1,134 +0,0 @@
/* mpi-mpow.c - MPI functions
* Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include "mpi-internal.h"
#include "longlong.h"
static int build_index(const MPI *exparray, int k, int i, int t)
{
int j, bitno;
int index = 0;
bitno = t - i;
for (j = k - 1; j >= 0; j--) {
index <<= 1;
if (mpi_test_bit(exparray[j], bitno))
index |= 1;
}
return index;
}
/****************
* RES = (BASE[0] ^ EXP[0]) * (BASE[1] ^ EXP[1]) * ... * mod M
*/
int mpi_mulpowm(MPI res, MPI *basearray, MPI *exparray, MPI m)
{
int rc = -ENOMEM;
int k; /* number of elements */
int t; /* bit size of largest exponent */
int i, j, idx;
MPI *G = NULL; /* table with precomputed values of size 2^k */
MPI tmp = NULL;
for (k = 0; basearray[k]; k++)
;
if (!k) {
pr_emerg("mpi_mulpowm: assert(k) failed\n");
BUG();
}
for (t = 0, i = 0; (tmp = exparray[i]); i++) {
j = mpi_get_nbits(tmp);
if (j > t)
t = j;
}
if (i != k) {
pr_emerg("mpi_mulpowm: assert(i==k) failed\n");
BUG();
}
if (!t) {
pr_emerg("mpi_mulpowm: assert(t) failed\n");
BUG();
}
if (k >= 10) {
pr_emerg("mpi_mulpowm: assert(k<10) failed\n");
BUG();
}
G = kzalloc((1 << k) * sizeof *G, GFP_KERNEL);
if (!G)
goto err_out;
/* and calculate */
tmp = mpi_alloc(mpi_get_nlimbs(m) + 1);
if (!tmp)
goto nomem;
if (mpi_set_ui(res, 1) < 0)
goto nomem;
for (i = 1; i <= t; i++) {
if (mpi_mulm(tmp, res, res, m) < 0)
goto nomem;
idx = build_index(exparray, k, i, t);
if (!(idx >= 0 && idx < (1 << k))) {
pr_emerg("mpi_mulpowm: assert(idx >= 0 && idx < (1<<k)) failed\n");
BUG();
}
if (!G[idx]) {
if (!idx) {
G[0] = mpi_alloc_set_ui(1);
if (!G[0])
goto nomem;
} else {
for (j = 0; j < k; j++) {
if ((idx & (1 << j))) {
if (!G[idx]) {
if (mpi_copy
(&G[idx],
basearray[j]) < 0)
goto nomem;
} else {
if (mpi_mulm
(G[idx], G[idx],
basearray[j],
m) < 0)
goto nomem;
}
}
}
if (!G[idx]) {
G[idx] = mpi_alloc(0);
if (!G[idx])
goto nomem;
}
}
}
if (mpi_mulm(res, tmp, G[idx], m) < 0)
goto nomem;
}
rc = 0;
nomem:
/* cleanup */
mpi_free(tmp);
for (i = 0; i < (1 << k); i++)
mpi_free(G[i]);
kfree(G);
err_out:
return rc;
}

194
lib/mpi/mpi-mul.c
View File

@ -1,194 +0,0 @@
/* mpi-mul.c - MPI functions
* Copyright (C) 1994, 1996 Free Software Foundation, Inc.
* Copyright (C) 1998, 2001 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
* Note: This code is heavily based on the GNU MP Library.
* Actually it's the same code with only minor changes in the
* way the data is stored; this is to support the abstraction
* of an optional secure memory allocation which may be used
* to avoid revealing of sensitive data due to paging etc.
* The GNU MP Library itself is published under the LGPL;
* however I decided to publish this code under the plain GPL.
*/
#include "mpi-internal.h"
int mpi_mul_ui(MPI prod, MPI mult, unsigned long small_mult)
{
mpi_size_t size, prod_size;
mpi_ptr_t prod_ptr;
mpi_limb_t cy;
int sign;
size = mult->nlimbs;
sign = mult->sign;
if (!size || !small_mult) {
prod->nlimbs = 0;
prod->sign = 0;
return 0;
}
prod_size = size + 1;
if (prod->alloced < prod_size)
if (mpi_resize(prod, prod_size) < 0)
return -ENOMEM;
prod_ptr = prod->d;
cy = mpihelp_mul_1(prod_ptr, mult->d, size, (mpi_limb_t) small_mult);
if (cy)
prod_ptr[size++] = cy;
prod->nlimbs = size;
prod->sign = sign;
return 0;
}
int mpi_mul_2exp(MPI w, MPI u, unsigned long cnt)
{
mpi_size_t usize, wsize, limb_cnt;
mpi_ptr_t wp;
mpi_limb_t wlimb;
int usign, wsign;
usize = u->nlimbs;
usign = u->sign;
if (!usize) {
w->nlimbs = 0;
w->sign = 0;
return 0;
}
limb_cnt = cnt / BITS_PER_MPI_LIMB;
wsize = usize + limb_cnt + 1;
if (w->alloced < wsize)
if (mpi_resize(w, wsize) < 0)
return -ENOMEM;
wp = w->d;
wsize = usize + limb_cnt;
wsign = usign;
cnt %= BITS_PER_MPI_LIMB;
if (cnt) {
wlimb = mpihelp_lshift(wp + limb_cnt, u->d, usize, cnt);
if (wlimb) {
wp[wsize] = wlimb;
wsize++;
}
} else {
MPN_COPY_DECR(wp + limb_cnt, u->d, usize);
}
/* Zero all whole limbs at low end. Do it here and not before calling
* mpn_lshift, not to lose for U == W. */
MPN_ZERO(wp, limb_cnt);
w->nlimbs = wsize;
w->sign = wsign;
return 0;
}
int mpi_mul(MPI w, MPI u, MPI v)
{
int rc = -ENOMEM;
mpi_size_t usize, vsize, wsize;
mpi_ptr_t up, vp, wp;
mpi_limb_t cy;
int usign, vsign, sign_product;
int assign_wp = 0;
mpi_ptr_t tmp_limb = NULL;
if (u->nlimbs < v->nlimbs) { /* Swap U and V. */
usize = v->nlimbs;
usign = v->sign;
up = v->d;
vsize = u->nlimbs;
vsign = u->sign;
vp = u->d;
} else {
usize = u->nlimbs;
usign = u->sign;
up = u->d;
vsize = v->nlimbs;
vsign = v->sign;
vp = v->d;
}
sign_product = usign ^ vsign;
wp = w->d;
/* Ensure W has space enough to store the result. */
wsize = usize + vsize;
if (w->alloced < (size_t) wsize) {
if (wp == up || wp == vp) {
wp = mpi_alloc_limb_space(wsize);
if (!wp)
goto nomem;
assign_wp = 1;
} else {
if (mpi_resize(w, wsize) < 0)
goto nomem;
wp = w->d;
}
} else { /* Make U and V not overlap with W. */
if (wp == up) {
/* W and U are identical. Allocate temporary space for U. */
up = tmp_limb = mpi_alloc_limb_space(usize);
if (!up)
goto nomem;
/* Is V identical too? Keep it identical with U. */
if (wp == vp)
vp = up;
/* Copy to the temporary space. */
MPN_COPY(up, wp, usize);
} else if (wp == vp) {
/* W and V are identical. Allocate temporary space for V. */
vp = tmp_limb = mpi_alloc_limb_space(vsize);
if (!vp)
goto nomem;
/* Copy to the temporary space. */
MPN_COPY(vp, wp, vsize);
}
}
if (!vsize)
wsize = 0;
else {
if (mpihelp_mul(wp, up, usize, vp, vsize, &cy) < 0)
goto nomem;
wsize -= cy ? 0 : 1;
}
if (assign_wp)
mpi_assign_limb_space(w, wp, wsize);
w->nlimbs = wsize;
w->sign = sign_product;
rc = 0;
nomem:
if (tmp_limb)
mpi_free_limb_space(tmp_limb);
return rc;
}
int mpi_mulm(MPI w, MPI u, MPI v, MPI m)
{
if (mpi_mul(w, u, v) < 0)
return -ENOMEM;
return mpi_fdiv_r(w, w, m);
}

136
lib/mpi/mpi-scan.c
View File

@ -1,136 +0,0 @@
/* mpi-scan.c - MPI functions
* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include "mpi-internal.h"
#include "longlong.h"
/****************
* Scan through an mpi and return byte for byte. a -1 is returned to indicate
* the end of the mpi. Scanning is done from the lsb to the msb, returned
* values are in the range of 0 .. 255.
*
* FIXME: This code is VERY ugly!
*/
int mpi_getbyte(const MPI a, unsigned idx)
{
int i, j;
unsigned n;
mpi_ptr_t ap;
mpi_limb_t limb;
ap = a->d;
for (n = 0, i = 0; i < a->nlimbs; i++) {
limb = ap[i];
for (j = 0; j < BYTES_PER_MPI_LIMB; j++, n++)
if (n == idx)
return (limb >> j * 8) & 0xff;
}
return -1;
}
/****************
* Put a value at position IDX into A. idx counts from lsb to msb
*/
void mpi_putbyte(MPI a, unsigned idx, int xc)
{
int i, j;
unsigned n;
mpi_ptr_t ap;
mpi_limb_t limb, c;
c = xc & 0xff;
ap = a->d;
for (n = 0, i = 0; i < a->alloced; i++) {
limb = ap[i];
for (j = 0; j < BYTES_PER_MPI_LIMB; j++, n++)
if (n == idx) {
#if BYTES_PER_MPI_LIMB == 4
if (j == 0)
limb = (limb & 0xffffff00) | c;
else if (j == 1)
limb = (limb & 0xffff00ff) | (c << 8);
else if (j == 2)
limb = (limb & 0xff00ffff) | (c << 16);
else
limb = (limb & 0x00ffffff) | (c << 24);
#elif BYTES_PER_MPI_LIMB == 8
if (j == 0)
limb = (limb & 0xffffffffffffff00) | c;
else if (j == 1)
limb =
(limb & 0xffffffffffff00ff) | (c <<
8);
else if (j == 2)
limb =
(limb & 0xffffffffff00ffff) | (c <<
16);
else if (j == 3)
limb =
(limb & 0xffffffff00ffffff) | (c <<
24);
else if (j == 4)
limb =
(limb & 0xffffff00ffffffff) | (c <<
32);
else if (j == 5)
limb =
(limb & 0xffff00ffffffffff) | (c <<
40);
else if (j == 6)
limb =
(limb & 0xff00ffffffffffff) | (c <<
48);
else
limb =
(limb & 0x00ffffffffffffff) | (c <<
56);
#else
#error please enhance this function, its ugly - i know.
#endif
if (a->nlimbs <= i)
a->nlimbs = i + 1;
ap[i] = limb;
return;
}
}
log_bug("index out of range\n");
}
/****************
* Count the number of zerobits at the low end of A
*/
unsigned mpi_trailing_zeros(const MPI a)
{
unsigned n, count = 0;
for (n = 0; n < a->nlimbs; n++) {
if (a->d[n]) {
unsigned nn;
mpi_limb_t alimb = a->d[n];
count_trailing_zeros(nn, alimb);
count += nn;
break;
}
count += BITS_PER_MPI_LIMB;
}
return count;
}

75
lib/mpi/mpicoder.c
View File

@ -73,81 +73,6 @@ leave:
}
EXPORT_SYMBOL_GPL(mpi_read_from_buffer);
/****************
* Make an mpi from a character string.
*/
int mpi_fromstr(MPI val, const char *str)
{
int hexmode = 0, sign = 0, prepend_zero = 0, i, j, c, c1, c2;
unsigned nbits, nbytes, nlimbs;
mpi_limb_t a;
if (*str == '-') {
sign = 1;
str++;
}
if (*str == '0' && str[1] == 'x')
hexmode = 1;
else
return -EINVAL; /* other bases are not yet supported */
str += 2;
nbits = strlen(str) * 4;
if (nbits % 8)
prepend_zero = 1;
nbytes = (nbits + 7) / 8;
nlimbs = (nbytes + BYTES_PER_MPI_LIMB - 1) / BYTES_PER_MPI_LIMB;
if (val->alloced < nlimbs)
if (!mpi_resize(val, nlimbs))
return -ENOMEM;
i = BYTES_PER_MPI_LIMB - nbytes % BYTES_PER_MPI_LIMB;
i %= BYTES_PER_MPI_LIMB;
j = val->nlimbs = nlimbs;
val->sign = sign;
for (; j > 0; j--) {
a = 0;
for (; i < BYTES_PER_MPI_LIMB; i++) {
if (prepend_zero) {
c1 = '0';
prepend_zero = 0;
} else
c1 = *str++;
assert(c1);
c2 = *str++;
assert(c2);
if (c1 >= '0' && c1 <= '9')
c = c1 - '0';
else if (c1 >= 'a' && c1 <= 'f')
c = c1 - 'a' + 10;
else if (c1 >= 'A' && c1 <= 'F')
c = c1 - 'A' + 10;
else {
mpi_clear(val);
return 1;
}
c <<= 4;
if (c2 >= '0' && c2 <= '9')
c |= c2 - '0';
else if (c2 >= 'a' && c2 <= 'f')
c |= c2 - 'a' + 10;
else if (c2 >= 'A' && c2 <= 'F')
c |= c2 - 'A' + 10;
else {
mpi_clear(val);
return 1;
}
a <<= 8;
a |= c;
}
i = 0;
val->d[j - 1] = a;
}
return 0;
}
EXPORT_SYMBOL_GPL(mpi_fromstr);
/****************
* Return an allocated buffer with the MPI (msb first).
* NBYTES receives the length of this buffer. Caller must free the

309
lib/mpi/mpih-div.c
View File

@ -37,159 +37,6 @@
#define UDIV_TIME UMUL_TIME
#endif
/* FIXME: We should be using invert_limb (or invert_normalized_limb)
* here (not udiv_qrnnd).
*/
mpi_limb_t
mpihelp_mod_1(mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
mpi_limb_t divisor_limb)
{
mpi_size_t i;
mpi_limb_t n1, n0, r;
int dummy;
/* Botch: Should this be handled at all? Rely on callers? */
if (!dividend_size)
return 0;
/* If multiplication is much faster than division, and the
* dividend is large, pre-invert the divisor, and use
* only multiplications in the inner loop.
*
* This test should be read:
* Does it ever help to use udiv_qrnnd_preinv?
* && Does what we save compensate for the inversion overhead?
*/
if (UDIV_TIME > (2 * UMUL_TIME + 6)
&& (UDIV_TIME - (2 * UMUL_TIME + 6)) * dividend_size > UDIV_TIME) {
int normalization_steps;
count_leading_zeros(normalization_steps, divisor_limb);
if (normalization_steps) {
mpi_limb_t divisor_limb_inverted;
divisor_limb <<= normalization_steps;
/* Compute (2**2N - 2**N * DIVISOR_LIMB) / DIVISOR_LIMB. The
* result is a (N+1)-bit approximation to 1/DIVISOR_LIMB, with the
* most significant bit (with weight 2**N) implicit.
*
* Special case for DIVISOR_LIMB == 100...000.
*/
if (!(divisor_limb << 1))
divisor_limb_inverted = ~(mpi_limb_t) 0;
else
udiv_qrnnd(divisor_limb_inverted, dummy,
-divisor_limb, 0, divisor_limb);
n1 = dividend_ptr[dividend_size - 1];
r = n1 >> (BITS_PER_MPI_LIMB - normalization_steps);
/* Possible optimization:
* if (r == 0
* && divisor_limb > ((n1 << normalization_steps)
* | (dividend_ptr[dividend_size - 2] >> ...)))
* ...one division less...
*/
for (i = dividend_size - 2; i >= 0; i--) {
n0 = dividend_ptr[i];
UDIV_QRNND_PREINV(dummy, r, r,
((n1 << normalization_steps)
| (n0 >>
(BITS_PER_MPI_LIMB -
normalization_steps))),
divisor_limb,
divisor_limb_inverted);
n1 = n0;
}
UDIV_QRNND_PREINV(dummy, r, r,
n1 << normalization_steps,
divisor_limb, divisor_limb_inverted);
return r >> normalization_steps;
} else {
mpi_limb_t divisor_limb_inverted;
/* Compute (2**2N - 2**N * DIVISOR_LIMB) / DIVISOR_LIMB. The
* result is a (N+1)-bit approximation to 1/DIVISOR_LIMB, with the
* most significant bit (with weight 2**N) implicit.
*
* Special case for DIVISOR_LIMB == 100...000.
*/
if (!(divisor_limb << 1))
divisor_limb_inverted = ~(mpi_limb_t) 0;
else
udiv_qrnnd(divisor_limb_inverted, dummy,
-divisor_limb, 0, divisor_limb);
i = dividend_size - 1;
r = dividend_ptr[i];
if (r >= divisor_limb)
r = 0;
else
i--;
for (; i >= 0; i--) {
n0 = dividend_ptr[i];
UDIV_QRNND_PREINV(dummy, r, r,
n0, divisor_limb,
divisor_limb_inverted);
}
return r;
}
} else {
if (UDIV_NEEDS_NORMALIZATION) {
int normalization_steps;
count_leading_zeros(normalization_steps, divisor_limb);
if (normalization_steps) {
divisor_limb <<= normalization_steps;
n1 = dividend_ptr[dividend_size - 1];
r = n1 >> (BITS_PER_MPI_LIMB -
normalization_steps);
/* Possible optimization:
* if (r == 0
* && divisor_limb > ((n1 << normalization_steps)
* | (dividend_ptr[dividend_size - 2] >> ...)))
* ...one division less...
*/
for (i = dividend_size - 2; i >= 0; i--) {
n0 = dividend_ptr[i];
udiv_qrnnd(dummy, r, r,
((n1 << normalization_steps)
| (n0 >>
(BITS_PER_MPI_LIMB -
normalization_steps))),
divisor_limb);
n1 = n0;
}
udiv_qrnnd(dummy, r, r,
n1 << normalization_steps,
divisor_limb);
return r >> normalization_steps;
}
}
/* No normalization needed, either because udiv_qrnnd doesn't require
* it, or because DIVISOR_LIMB is already normalized. */
i = dividend_size - 1;
r = dividend_ptr[i];
if (r >= divisor_limb)
r = 0;
else
i--;
for (; i >= 0; i--) {
n0 = dividend_ptr[i];
udiv_qrnnd(dummy, r, r, n0, divisor_limb);
}
return r;
}
}
/* Divide num (NP/NSIZE) by den (DP/DSIZE) and write
* the NSIZE-DSIZE least significant quotient limbs at QP
* and the DSIZE long remainder at NP. If QEXTRA_LIMBS is
@ -387,159 +234,3 @@ q_test:
return most_significant_q_limb;
}
/****************
* Divide (DIVIDEND_PTR,,DIVIDEND_SIZE) by DIVISOR_LIMB.
* Write DIVIDEND_SIZE limbs of quotient at QUOT_PTR.
* Return the single-limb remainder.
* There are no constraints on the value of the divisor.
*
* QUOT_PTR and DIVIDEND_PTR might point to the same limb.
*/
mpi_limb_t
mpihelp_divmod_1(mpi_ptr_t quot_ptr,
mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
mpi_limb_t divisor_limb)
{
mpi_size_t i;
mpi_limb_t n1, n0, r;
int dummy;
if (!dividend_size)
return 0;
/* If multiplication is much faster than division, and the
* dividend is large, pre-invert the divisor, and use
* only multiplications in the inner loop.
*
* This test should be read:
* Does it ever help to use udiv_qrnnd_preinv?
* && Does what we save compensate for the inversion overhead?
*/
if (UDIV_TIME > (2 * UMUL_TIME + 6)
&& (UDIV_TIME - (2 * UMUL_TIME + 6)) * dividend_size > UDIV_TIME) {
int normalization_steps;
count_leading_zeros(normalization_steps, divisor_limb);
if (normalization_steps) {
mpi_limb_t divisor_limb_inverted;
divisor_limb <<= normalization_steps;
/* Compute (2**2N - 2**N * DIVISOR_LIMB) / DIVISOR_LIMB. The
* result is a (N+1)-bit approximation to 1/DIVISOR_LIMB, with the
* most significant bit (with weight 2**N) implicit.
*/
/* Special case for DIVISOR_LIMB == 100...000. */
if (!(divisor_limb << 1))
divisor_limb_inverted = ~(mpi_limb_t) 0;
else
udiv_qrnnd(divisor_limb_inverted, dummy,
-divisor_limb, 0, divisor_limb);
n1 = dividend_ptr[dividend_size - 1];
r = n1 >> (BITS_PER_MPI_LIMB - normalization_steps);
/* Possible optimization:
* if (r == 0
* && divisor_limb > ((n1 << normalization_steps)
* | (dividend_ptr[dividend_size - 2] >> ...)))
* ...one division less...
*/
for (i = dividend_size - 2; i >= 0; i--) {
n0 = dividend_ptr[i];
UDIV_QRNND_PREINV(quot_ptr[i + 1], r, r,
((n1 << normalization_steps)
| (n0 >>
(BITS_PER_MPI_LIMB -
normalization_steps))),
divisor_limb,
divisor_limb_inverted);
n1 = n0;
}
UDIV_QRNND_PREINV(quot_ptr[0], r, r,
n1 << normalization_steps,
divisor_limb, divisor_limb_inverted);
return r >> normalization_steps;
} else {
mpi_limb_t divisor_limb_inverted;
/* Compute (2**2N - 2**N * DIVISOR_LIMB) / DIVISOR_LIMB. The
* result is a (N+1)-bit approximation to 1/DIVISOR_LIMB, with the
* most significant bit (with weight 2**N) implicit.
*/
/* Special case for DIVISOR_LIMB == 100...000. */
if (!(divisor_limb << 1))
divisor_limb_inverted = ~(mpi_limb_t) 0;
else
udiv_qrnnd(divisor_limb_inverted, dummy,
-divisor_limb, 0, divisor_limb);
i = dividend_size - 1;
r = dividend_ptr[i];
if (r >= divisor_limb)
r = 0;
else
quot_ptr[i--] = 0;
for (; i >= 0; i--) {
n0 = dividend_ptr[i];
UDIV_QRNND_PREINV(quot_ptr[i], r, r,
n0, divisor_limb,
divisor_limb_inverted);
}
return r;
}
} else {
if (UDIV_NEEDS_NORMALIZATION) {
int normalization_steps;
count_leading_zeros(normalization_steps, divisor_limb);
if (normalization_steps) {
divisor_limb <<= normalization_steps;
n1 = dividend_ptr[dividend_size - 1];
r = n1 >> (BITS_PER_MPI_LIMB -
normalization_steps);
/* Possible optimization:
* if (r == 0
* && divisor_limb > ((n1 << normalization_steps)
* | (dividend_ptr[dividend_size - 2] >> ...)))
* ...one division less...
*/
for (i = dividend_size - 2; i >= 0; i--) {
n0 = dividend_ptr[i];
udiv_qrnnd(quot_ptr[i + 1], r, r,
((n1 << normalization_steps)
| (n0 >>
(BITS_PER_MPI_LIMB -
normalization_steps))),
divisor_limb);
n1 = n0;
}
udiv_qrnnd(quot_ptr[0], r, r,
n1 << normalization_steps,
divisor_limb);
return r >> normalization_steps;
}
}
/* No normalization needed, either because udiv_qrnnd doesn't require
* it, or because DIVISOR_LIMB is already normalized. */
i = dividend_size - 1;
r = dividend_ptr[i];
if (r >= divisor_limb)
r = 0;
else
quot_ptr[i--] = 0;
for (; i >= 0; i--) {
n0 = dividend_ptr[i];
udiv_qrnnd(quot_ptr[i], r, r, n0, divisor_limb);
}
return r;
}
}

30
lib/mpi/mpih-mul.c
View File

@ -330,36 +330,6 @@ mpih_sqr_n(mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t size, mpi_ptr_t tspace)
}
}
/* This should be made into an inline function in gmp.h. */
int mpihelp_mul_n(mpi_ptr_t prodp, mpi_ptr_t up, mpi_ptr_t vp, mpi_size_t size)
{
if (up == vp) {
if (size < KARATSUBA_THRESHOLD)
mpih_sqr_n_basecase(prodp, up, size);
else {
mpi_ptr_t tspace;
tspace = mpi_alloc_limb_space(2 * size);
if (!tspace)
return -ENOMEM;
mpih_sqr_n(prodp, up, size, tspace);
mpi_free_limb_space(tspace);
}
} else {
if (size < KARATSUBA_THRESHOLD)
mul_n_basecase(prodp, up, vp, size);
else {
mpi_ptr_t tspace;
tspace = mpi_alloc_limb_space(2 * size);
if (!tspace)
return -ENOMEM;
mul_n(prodp, up, vp, size, tspace);
mpi_free_limb_space(tspace);
}
}
return 0;
}
int
mpihelp_mul_karatsuba_case(mpi_ptr_t prodp,
mpi_ptr_t up, mpi_size_t usize,

88
lib/mpi/mpiutil.c
View File

@ -106,13 +106,6 @@ int mpi_resize(MPI a, unsigned nlimbs)
return 0;
}
void mpi_clear(MPI a)
{
a->nlimbs = 0;
a->nbits = 0;
a->flags = 0;
}
void mpi_free(MPI a)
{
if (!a)
@ -128,84 +121,3 @@ void mpi_free(MPI a)
kfree(a);
}
EXPORT_SYMBOL_GPL(mpi_free);
/****************
* Note: This copy function should not interpret the MPI
* but copy it transparently.
*/
int mpi_copy(MPI *copied, const MPI a)
{
size_t i;
MPI b;
*copied = NULL;
if (a) {
b = mpi_alloc(a->nlimbs);
if (!b)
return -ENOMEM;
b->nlimbs = a->nlimbs;
b->sign = a->sign;
b->flags = a->flags;
b->nbits = a->nbits;
for (i = 0; i < b->nlimbs; i++)
b->d[i] = a->d[i];
*copied = b;
}
return 0;
}
int mpi_set(MPI w, const MPI u)
{
mpi_ptr_t wp, up;
mpi_size_t usize = u->nlimbs;
int usign = u->sign;
if (RESIZE_IF_NEEDED(w, (size_t) usize) < 0)
return -ENOMEM;
wp = w->d;
up = u->d;
MPN_COPY(wp, up, usize);
w->nlimbs = usize;
w->nbits = u->nbits;
w->flags = u->flags;
w->sign = usign;
return 0;
}
int mpi_set_ui(MPI w, unsigned long u)
{
if (RESIZE_IF_NEEDED(w, 1) < 0)
return -ENOMEM;
w->d[0] = u;
w->nlimbs = u ? 1 : 0;
w->sign = 0;
w->nbits = 0;
w->flags = 0;
return 0;
}
MPI mpi_alloc_set_ui(unsigned long u)
{
MPI w = mpi_alloc(1);
if (!w)
return w;
w->d[0] = u;
w->nlimbs = u ? 1 : 0;
w->sign = 0;
return w;
}
void mpi_swap(MPI a, MPI b)
{
struct gcry_mpi tmp;
tmp = *a;
*a = *b;
*b = tmp;
}

3
samples/seccomp/.gitignore vendored Normal file
View File

@ -0,0 +1,3 @@
bpf-direct
bpf-fancy
dropper

3
security/integrity/ima/Kconfig
View File

@ -38,8 +38,9 @@ config IMA_MEASURE_PCR_IDX
measurement list. If unsure, use the default 10.
config IMA_AUDIT
bool
bool "Enables auditing support"
depends on IMA
depends on AUDIT
default y
help
This option adds a kernel parameter 'ima_audit', which

3
security/integrity/ima/Makefile
View File

@ -6,4 +6,5 @@
obj-$(CONFIG_IMA) += ima.o
ima-y := ima_fs.o ima_queue.o ima_init.o ima_main.o ima_crypto.o ima_api.o \
ima_policy.o ima_audit.o
ima_policy.o
ima-$(CONFIG_IMA_AUDIT) += ima_audit.o

9
security/integrity/ima/ima.h
View File

@ -61,10 +61,19 @@ struct ima_queue_entry {
};
extern struct list_head ima_measurements; /* list of all measurements */
#ifdef CONFIG_IMA_AUDIT
/* declarations */
void integrity_audit_msg(int audit_msgno, struct inode *inode,
const unsigned char *fname, const char *op,
const char *cause, int result, int info);
#else
static inline void integrity_audit_msg(int audit_msgno, struct inode *inode,
const unsigned char *fname,
const char *op, const char *cause,
int result, int info)
{
}
#endif
/* Internal IMA function definitions */
int ima_init(void);

4
security/integrity/ima/ima_api.c
View File

@ -175,7 +175,9 @@ void ima_store_measurement(struct integrity_iint_cache *iint,
}
memset(&entry->template, 0, sizeof(entry->template));
memcpy(entry->template.digest, iint->digest, IMA_DIGEST_SIZE);
strncpy(entry->template.file_name, filename, IMA_EVENT_NAME_LEN_MAX);
strcpy(entry->template.file_name,
(strlen(filename) > IMA_EVENT_NAME_LEN_MAX) ?
file->f_dentry->d_name.name : filename);
result = ima_store_template(entry, violation, inode);
if (!result || result == -EEXIST)

3
security/integrity/ima/ima_audit.c
View File

@ -17,8 +17,6 @@
static int ima_audit;
#ifdef CONFIG_IMA_AUDIT
/* ima_audit_setup - enable informational auditing messages */
static int __init ima_audit_setup(char *str)
{
@ -29,7 +27,6 @@ static int __init ima_audit_setup(char *str)
return 1;
}
__setup("ima_audit=", ima_audit_setup);
#endif
void integrity_audit_msg(int audit_msgno, struct inode *inode,
const unsigned char *fname, const char *op,

11
security/integrity/ima/ima_fs.c
View File

@ -367,6 +367,7 @@ int __init ima_fs_init(void)
return 0;
out:
securityfs_remove(violations);
securityfs_remove(runtime_measurements_count);
securityfs_remove(ascii_runtime_measurements);
securityfs_remove(binary_runtime_measurements);
@ -374,13 +375,3 @@ out:
securityfs_remove(ima_policy);
return -1;
}
void __exit ima_fs_cleanup(void)
{
securityfs_remove(violations);
securityfs_remove(runtime_measurements_count);
securityfs_remove(ascii_runtime_measurements);
securityfs_remove(binary_runtime_measurements);
securityfs_remove(ima_dir);
securityfs_remove(ima_policy);
}

5
security/integrity/ima/ima_init.c
View File

@ -90,8 +90,3 @@ int __init ima_init(void)
return ima_fs_init();
}
void __exit ima_cleanup(void)
{
ima_fs_cleanup();
}

50
security/integrity/ima/ima_main.c
View File

@ -54,6 +54,7 @@ static void ima_rdwr_violation_check(struct file *file)
fmode_t mode = file->f_mode;
int rc;
bool send_tomtou = false, send_writers = false;
unsigned char *pathname = NULL, *pathbuf = NULL;
if (!S_ISREG(inode->i_mode) || !ima_initialized)
return;
@ -75,12 +76,27 @@ static void ima_rdwr_violation_check(struct file *file)
out:
mutex_unlock(&inode->i_mutex);
if (!send_tomtou && !send_writers)
return;
/* We will allow 11 spaces for ' (deleted)' to be appended */
pathbuf = kmalloc(PATH_MAX + 11, GFP_KERNEL);
if (pathbuf) {
pathname = d_path(&file->f_path, pathbuf, PATH_MAX + 11);
if (IS_ERR(pathname))
pathname = NULL;
else if (strlen(pathname) > IMA_EVENT_NAME_LEN_MAX)
pathname = NULL;
}
if (send_tomtou)
ima_add_violation(inode, dentry->d_name.name, "invalid_pcr",
"ToMToU");
ima_add_violation(inode,
!pathname ? dentry->d_name.name : pathname,
"invalid_pcr", "ToMToU");
if (send_writers)
ima_add_violation(inode, dentry->d_name.name, "invalid_pcr",
"open_writers");
ima_add_violation(inode,
!pathname ? dentry->d_name.name : pathname,
"invalid_pcr", "open_writers");
kfree(pathbuf);
}
static void ima_check_last_writer(struct integrity_iint_cache *iint,
@ -123,6 +139,7 @@ static int process_measurement(struct file *file, const unsigned char *filename,
{
struct inode *inode = file->f_dentry->d_inode;
struct integrity_iint_cache *iint;
unsigned char *pathname = NULL, *pathbuf = NULL;
int rc = 0;
if (!ima_initialized || !S_ISREG(inode->i_mode))
@ -147,8 +164,21 @@ retry:
goto out;
rc = ima_collect_measurement(iint, file);
if (!rc)
ima_store_measurement(iint, file, filename);
if (rc != 0)
goto out;
if (function != BPRM_CHECK) {
/* We will allow 11 spaces for ' (deleted)' to be appended */
pathbuf = kmalloc(PATH_MAX + 11, GFP_KERNEL);
if (pathbuf) {
pathname =
d_path(&file->f_path, pathbuf, PATH_MAX + 11);
if (IS_ERR(pathname))
pathname = NULL;
}
}
ima_store_measurement(iint, file, !pathname ? filename : pathname);
kfree(pathbuf);
out:
mutex_unlock(&iint->mutex);
return rc;
@ -228,15 +258,11 @@ static int __init init_ima(void)
int error;
error = ima_init();
ima_initialized = 1;
if (!error)
ima_initialized = 1;
return error;
}
static void __exit cleanup_ima(void)
{
ima_cleanup();
}
late_initcall(init_ima); /* Start IMA after the TPM is available */
MODULE_DESCRIPTION("Integrity Measurement Architecture");

2
security/integrity/ima/ima_policy.c
View File

@ -63,6 +63,8 @@ static struct ima_measure_rule_entry default_rules[] = {
{.action = DONT_MEASURE,.fsmagic = DEBUGFS_MAGIC,.flags = IMA_FSMAGIC},
{.action = DONT_MEASURE,.fsmagic = TMPFS_MAGIC,.flags = IMA_FSMAGIC},
{.action = DONT_MEASURE,.fsmagic = RAMFS_MAGIC,.flags = IMA_FSMAGIC},
{.action = DONT_MEASURE,.fsmagic = DEVPTS_SUPER_MAGIC,.flags = IMA_FSMAGIC},
{.action = DONT_MEASURE,.fsmagic = BINFMTFS_MAGIC,.flags = IMA_FSMAGIC},
{.action = DONT_MEASURE,.fsmagic = SECURITYFS_MAGIC,.flags = IMA_FSMAGIC},
{.action = DONT_MEASURE,.fsmagic = SELINUX_MAGIC,.flags = IMA_FSMAGIC},
{.action = MEASURE,.func = FILE_MMAP,.mask = MAY_EXEC,

4
security/keys/compat.c
View File

@ -24,7 +24,7 @@
*
* If successful, 0 will be returned.
*/
long compat_keyctl_instantiate_key_iov(
static long compat_keyctl_instantiate_key_iov(
key_serial_t id,
const struct compat_iovec __user *_payload_iov,
unsigned ioc,
@ -33,7 +33,7 @@ long compat_keyctl_instantiate_key_iov(
struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
long ret;
if (_payload_iov == 0 || ioc == 0)
if (!_payload_iov || !ioc)
goto no_payload;
ret = compat_rw_copy_check_uvector(WRITE, _payload_iov, ioc,

2
security/keys/internal.h
View File

@ -242,7 +242,7 @@ extern long keyctl_instantiate_key_iov(key_serial_t,
extern long keyctl_invalidate_key(key_serial_t);
extern long keyctl_instantiate_key_common(key_serial_t,
const struct iovec __user *,
const struct iovec *,
unsigned, size_t, key_serial_t);
/*

2
security/keys/keyctl.c
View File

@ -1106,7 +1106,7 @@ long keyctl_instantiate_key_iov(key_serial_t id,
struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
long ret;
if (_payload_iov == 0 || ioc == 0)
if (!_payload_iov || !ioc)
goto no_payload;
ret = rw_copy_check_uvector(WRITE, _payload_iov, ioc,

2
security/keys/keyring.c
View File

@ -751,6 +751,7 @@ static void keyring_unlink_rcu_disposal(struct rcu_head *rcu)
int __key_link_begin(struct key *keyring, const struct key_type *type,
const char *description, unsigned long *_prealloc)
__acquires(&keyring->sem)
__acquires(&keyring_serialise_link_sem)
{
struct keyring_list *klist, *nklist;
unsigned long prealloc;
@ -960,6 +961,7 @@ void __key_link(struct key *keyring, struct key *key,
void __key_link_end(struct key *keyring, struct key_type *type,
unsigned long prealloc)
__releases(&keyring->sem)
__releases(&keyring_serialise_link_sem)
{
BUG_ON(type == NULL);
BUG_ON(type->name == NULL);

14
security/smack/smack.h
View File

@ -43,7 +43,6 @@ struct superblock_smack {
char *smk_hat;
char *smk_default;
int smk_initialized;
spinlock_t smk_sblock; /* for initialization */
};
struct socket_smack {
@ -283,6 +282,19 @@ static inline char *smk_of_current(void)
return smk_of_task(current_security());
}
/*
* Is the task privileged and allowed to be privileged
* by the onlycap rule.
*/
static inline int smack_privileged(int cap)
{
if (!capable(cap))
return 0;
if (smack_onlycap == NULL || smack_onlycap == smk_of_current())
return 1;
return 0;
}
/*
* logging functions
*/

9
security/smack/smack_access.c
View File

@ -220,14 +220,9 @@ int smk_curacc(char *obj_label, u32 mode, struct smk_audit_info *a)
}
/*
* Return if a specific label has been designated as the
* only one that gets privilege and current does not
* have that label.
* Allow for priviliged to override policy.
*/
if (smack_onlycap != NULL && smack_onlycap != sp)
goto out_audit;
if (capable(CAP_MAC_OVERRIDE))
if (rc != 0 && smack_privileged(CAP_MAC_OVERRIDE))
rc = 0;
out_audit:

25
security/smack/smack_lsm.c
View File

@ -217,7 +217,7 @@ static int smack_syslog(int typefrom_file)
int rc = 0;
char *sp = smk_of_current();
if (capable(CAP_MAC_OVERRIDE))
if (smack_privileged(CAP_MAC_OVERRIDE))
return 0;
if (sp != smack_known_floor.smk_known)
@ -251,7 +251,6 @@ static int smack_sb_alloc_security(struct super_block *sb)
sbsp->smk_floor = smack_known_floor.smk_known;
sbsp->smk_hat = smack_known_hat.smk_known;
sbsp->smk_initialized = 0;
spin_lock_init(&sbsp->smk_sblock);
sb->s_security = sbsp;
@ -332,13 +331,10 @@ static int smack_sb_kern_mount(struct super_block *sb, int flags, void *data)
char *commap;
char *nsp;
spin_lock(&sp->smk_sblock);
if (sp->smk_initialized != 0) {
spin_unlock(&sp->smk_sblock);
if (sp->smk_initialized != 0)
return 0;
}
sp->smk_initialized = 1;
spin_unlock(&sp->smk_sblock);
for (op = data; op != NULL; op = commap) {
commap = strchr(op, ',');
@ -825,7 +821,7 @@ static int smack_inode_setxattr(struct dentry *dentry, const char *name,
strcmp(name, XATTR_NAME_SMACKIPOUT) == 0 ||
strcmp(name, XATTR_NAME_SMACKEXEC) == 0 ||
strcmp(name, XATTR_NAME_SMACKMMAP) == 0) {
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
rc = -EPERM;
/*
* check label validity here so import wont fail on
@ -835,7 +831,7 @@ static int smack_inode_setxattr(struct dentry *dentry, const char *name,
smk_import(value, size) == NULL)
rc = -EINVAL;
} else if (strcmp(name, XATTR_NAME_SMACKTRANSMUTE) == 0) {
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
rc = -EPERM;
if (size != TRANS_TRUE_SIZE ||
strncmp(value, TRANS_TRUE, TRANS_TRUE_SIZE) != 0)
@ -931,7 +927,7 @@ static int smack_inode_removexattr(struct dentry *dentry, const char *name)
strcmp(name, XATTR_NAME_SMACKEXEC) == 0 ||
strcmp(name, XATTR_NAME_SMACKTRANSMUTE) == 0 ||
strcmp(name, XATTR_NAME_SMACKMMAP)) {
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
rc = -EPERM;
} else
rc = cap_inode_removexattr(dentry, name);
@ -1720,7 +1716,8 @@ static int smack_task_wait(struct task_struct *p)
* state into account in the decision as well as
* the smack value.
*/
if (capable(CAP_MAC_OVERRIDE) || has_capability(p, CAP_MAC_OVERRIDE))
if (smack_privileged(CAP_MAC_OVERRIDE) ||
has_capability(p, CAP_MAC_OVERRIDE))
rc = 0;
/* we log only if we didn't get overriden */
out_log:
@ -2721,7 +2718,7 @@ static int smack_setprocattr(struct task_struct *p, char *name,
if (p != current)
return -EPERM;
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
if (value == NULL || size == 0 || size >= SMK_LONGLABEL)
@ -2784,7 +2781,7 @@ static int smack_unix_stream_connect(struct sock *sock,
smk_ad_setfield_u_net_sk(&ad, other);
#endif
if (!capable(CAP_MAC_OVERRIDE))
if (!smack_privileged(CAP_MAC_OVERRIDE))
rc = smk_access(ssp->smk_out, osp->smk_in, MAY_WRITE, &ad);
/*
@ -2820,7 +2817,7 @@ static int smack_unix_may_send(struct socket *sock, struct socket *other)
smk_ad_setfield_u_net_sk(&ad, other->sk);
#endif
if (!capable(CAP_MAC_OVERRIDE))
if (!smack_privileged(CAP_MAC_OVERRIDE))
rc = smk_access(ssp->smk_out, osp->smk_in, MAY_WRITE, &ad);
return rc;

53
security/smack/smackfs.c
View File

@ -215,28 +215,27 @@ static int smk_set_access(struct smack_rule *srp, struct list_head *rule_list,
* @access: access string
* @rule: Smack rule
* @import: if non-zero, import labels
* @len: label length limit
*
* Returns 0 on success, -1 on failure
*/
static int smk_fill_rule(const char *subject, const char *object,
const char *access, struct smack_rule *rule,
int import)
int import, int len)
{
int rc = -1;
int done;
const char *cp;
struct smack_known *skp;
if (import) {
rule->smk_subject = smk_import(subject, 0);
rule->smk_subject = smk_import(subject, len);
if (rule->smk_subject == NULL)
return -1;
rule->smk_object = smk_import(object, 0);
rule->smk_object = smk_import(object, len);
if (rule->smk_object == NULL)
return -1;
} else {
cp = smk_parse_smack(subject, 0);
cp = smk_parse_smack(subject, len);
if (cp == NULL)
return -1;
skp = smk_find_entry(cp);
@ -245,7 +244,7 @@ static int smk_fill_rule(const char *subject, const char *object,
return -1;
rule->smk_subject = skp->smk_known;
cp = smk_parse_smack(object, 0);
cp = smk_parse_smack(object, len);
if (cp == NULL)
return -1;
skp = smk_find_entry(cp);
@ -257,7 +256,7 @@ static int smk_fill_rule(const char *subject, const char *object,
rule->smk_access = 0;
for (cp = access, done = 0; *cp && !done; cp++) {
for (cp = access; *cp != '\0'; cp++) {
switch (*cp) {
case '-':
break;
@ -282,13 +281,11 @@ static int smk_fill_rule(const char *subject, const char *object,
rule->smk_access |= MAY_TRANSMUTE;
break;
default:
done = 1;
break;
return 0;
}
}
rc = 0;
return rc;
return 0;
}
/**
@ -304,7 +301,8 @@ static int smk_parse_rule(const char *data, struct smack_rule *rule, int import)
int rc;
rc = smk_fill_rule(data, data + SMK_LABELLEN,
data + SMK_LABELLEN + SMK_LABELLEN, rule, import);
data + SMK_LABELLEN + SMK_LABELLEN, rule, import,
SMK_LABELLEN);
return rc;
}
@ -340,7 +338,7 @@ static int smk_parse_long_rule(const char *data, struct smack_rule *rule,
goto free_out_o;
if (sscanf(data, "%s %s %s", subject, object, access) == 3)
rc = smk_fill_rule(subject, object, access, rule, import);
rc = smk_fill_rule(subject, object, access, rule, import, 0);
kfree(access);
free_out_o:
@ -520,6 +518,9 @@ static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max)
if (strlen(srp->smk_subject) >= max || strlen(srp->smk_object) >= max)
return;
if (srp->smk_access == 0)
return;
seq_printf(s, "%s %s", srp->smk_subject, srp->smk_object);
seq_putc(s, ' ');
@ -534,8 +535,6 @@ static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max)
seq_putc(s, 'a');
if (srp->smk_access & MAY_TRANSMUTE)
seq_putc(s, 't');
if (srp->smk_access == 0)
seq_putc(s, '-');
seq_putc(s, '\n');
}
@ -595,13 +594,12 @@ static int smk_open_load(struct inode *inode, struct file *file)
static ssize_t smk_write_load(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
/*
* Must have privilege.
* No partial writes.
* Enough data must be present.
*/
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
@ -787,7 +785,7 @@ static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
* No partial writes.
* Enough data must be present.
*/
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
if (*ppos != 0)
return -EINVAL;
@ -1090,7 +1088,7 @@ static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf,
* "<addr/mask, as a.b.c.d/e><space><label>"
* "<addr, as a.b.c.d><space><label>"
*/
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
if (*ppos != 0)
return -EINVAL;
@ -1267,7 +1265,7 @@ static ssize_t smk_write_doi(struct file *file, const char __user *buf,
char temp[80];
int i;
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
if (count >= sizeof(temp) || count == 0)
@ -1334,7 +1332,7 @@ static ssize_t smk_write_direct(struct file *file, const char __user *buf,
char temp[80];
int i;
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
if (count >= sizeof(temp) || count == 0)
@ -1412,7 +1410,7 @@ static ssize_t smk_write_mapped(struct file *file, const char __user *buf,
char temp[80];
int i;
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
if (count >= sizeof(temp) || count == 0)
@ -1503,7 +1501,7 @@ static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
char *data;
int rc = count;
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
data = kzalloc(count + 1, GFP_KERNEL);
@ -1586,7 +1584,7 @@ static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
char *sp = smk_of_task(current->cred->security);
int rc = count;
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
/*
@ -1664,7 +1662,7 @@ static ssize_t smk_write_logging(struct file *file, const char __user *buf,
char temp[32];
int i;
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
if (count >= sizeof(temp) || count == 0)
@ -1885,7 +1883,7 @@ static ssize_t smk_write_load2(struct file *file, const char __user *buf,
/*
* Must have privilege.
*/
if (!capable(CAP_MAC_ADMIN))
if (!smack_privileged(CAP_MAC_ADMIN))
return -EPERM;
return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
@ -2051,7 +2049,6 @@ static int smk_fill_super(struct super_block *sb, void *data, int silent)
}
root_inode = sb->s_root->d_inode;
root_inode->i_security = new_inode_smack(smack_known_floor.smk_known);
return 0;
}