From: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Date: Wed, 31 Aug 2011 11:05:16 +0000 (+0300)
Subject: crypto: GnuPG based MPI lib - make files (part 3)
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d9c46b184fcfd33c85a7dc48a653435a08e21f56;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

crypto: GnuPG based MPI lib - make files (part 3)

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.kasatkin@intel.com>
---

diff --git a/lib/Kconfig b/lib/Kconfig
index 32f3e5ae2be5..4af07ec7f2de 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -276,4 +276,11 @@ config CORDIC
 	  so its calculations are in fixed point. Modules can select this
 	  when they require this function. Module will be called cordic.
 
+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 a4da283f5dc0..6ba8cbf4c72f 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -115,6 +115,8 @@ obj-$(CONFIG_CPU_RMAP) += cpu_rmap.o
 
 obj-$(CONFIG_CORDIC) += cordic.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 000000000000..45ca90a8639c
--- /dev/null
+++ b/lib/mpi/Makefile
@@ -0,0 +1,21 @@
+#
+# 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