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-rw-r--r--lib/Kconfig25
1 files changed, 25 insertions, 0 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 7f6b8bca8c25..201e1b33d721 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -285,4 +285,29 @@ config CORDIC
This option provides an implementation of the CORDIC algorithm;
calculations are in fixed point. 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.
+
+config MPILIB_EXTRA
+ bool "Multiprecision maths library - additional sources"
+ depends on MPILIB
+ help
+ Multiprecision maths library from GnuPG.
+ It is used to implement RSA digital signature verification,
+ which is used by IMA/EVM digital signature extension.
+ This code in unnecessary for RSA digital signature verification,
+ and can be compiled if needed.
+
+config DIGSIG
+ tristate "In-kernel signature checker"
+ depends on KEYS
+ select MPILIB
+ help
+ Digital signature verification. Currently only RSA is supported.
+ Implementation is done using GnuPG MPI library
+
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