Adds the multi-precision-integer maths library which was originally taken
from GnuPG and ported to the kernel by (among others) David Howells.
This version is taken from Fedora kernel 2.6.32-71.14.1.el6.
The difference is that checkpatch reported errors and warnings have been fixed.
This library is used to implemenet RSA digital signature verification
used in IMA/EVM integrity protection subsystem.
Due to patch size limitation, the patch is divided into 4 parts.
Signed-off-by: Dmitry Kasatkin <dmitry.kasat...@intel.com>
---
lib/Kconfig | 7 +++++++
lib/Makefile | 2 ++
lib/mpi/Makefile | 22 ++++++++++++++++++++++
3 files changed, 31 insertions(+), 0 deletions(-)
create mode 100644 lib/mpi/Makefile
diff --git a/lib/Kconfig b/lib/Kconfig
index 6c695ff..f69ce08 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -279,4 +279,11 @@ config CORDIC
config LLIST
bool
+config MPILIB
+ tristate "Multiprecision maths library"
+ help
+ Multiprecision maths library from GnuPG.
+ It is used to implement RSA digital signature verification,
+ which is used by IMA/EVM digital signature extension.
+
endmenu
diff --git a/lib/Makefile b/lib/Makefile
index d5d175c..97705ae 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -117,6 +117,8 @@ obj-$(CONFIG_CORDIC) += cordic.o
obj-$(CONFIG_LLIST) += llist.o
+obj-$(CONFIG_MPILIB) += mpi/
+
hostprogs-y := gen_crc32table
clean-files := crc32table.h
diff --git a/lib/mpi/Makefile b/lib/mpi/Makefile
new file mode 100644
index 0000000..0c1c6c3
--- /dev/null
+++ b/lib/mpi/Makefile
@@ -0,0 +1,22 @@
+#
+# MPI multiprecision maths library (from gpg)
+#
+
+obj-$(CONFIG_MPILIB) = mpi.o
+
+mpi-y = \
+ generic_mpih-lshift.o \
+ generic_mpih-mul1.o \
+ generic_mpih-mul2.o \
+ generic_mpih-mul3.o \
+ generic_mpih-rshift.o \
+ generic_mpih-sub1.o \
+ generic_mpih-add1.o \
+ mpicoder.o \
+ mpi-bit.o \
+ mpih-cmp.o \
+ mpih-div.o \
+ mpih-mul.o \
+ mpi-pow.o \
+ mpiutil.o
+
--
1.7.4.1
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