15 Jan, 2015
1 commit
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If u and v both represent negative integers and their limb counts
happen to differ, mpi_cmp will always return a positive value - this
is obviously bogus. u is smaller than v if and only if it is larger in
absolute value.Signed-off-by: Rasmus Villemoes
Signed-off-by: David Howells
Acked-by: Dmitry Kasatkin
14 Jan, 2015
1 commit
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The condition preceding 'return 1;' makes my head hurt. At this point,
we know that u and v have the same sign; if they are negative, they
compare opposite to how their absolute values compare (which
mpihelp_cmp found for us), otherwise cmp itself is the
answer. Negating cmp is ok since mpihelp_cmp returns {-1,0,1};
-INT_MIN==INT_MIN won't bite us.Signed-off-by: Rasmus Villemoes
Signed-off-by: David Howells
Acked-by: Dmitry Kasatkin
08 Oct, 2012
1 commit
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Reinstate and export mpi_cmp() and mpi_cmp_ui() from the MPI library for use by
RSA signature verification as per RFC3447 section 5.2.2 step 1.Signed-off-by: David Howells
Signed-off-by: Rusty Russell
26 May, 2012
1 commit
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This reverts commit 7e8dec918ef8e0f68b4937c3c50fa57002077a4d.
RSA verification implementation does not use this code.
James Morris has asked to remove that.Signed-off-by: Dmitry Kasatkin
Requested-by: James Morris
Signed-off-by: James Morris
09 Nov, 2011
1 commit
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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.
This code is unnecessary for RSA digital signature verification,
but for completeness it is included here and can be compiled,
if CONFIG_MPILIB_EXTRA is enabled.Signed-off-by: Dmitry Kasatkin