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MPILIB: add mpi_read_buf() and mpi_get_size() helpers

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Added a mpi_read_buf() helper function to export MPI to a buf provided by
the user, and a mpi_get_size() helper, that tells the user how big the buf is.
Changed mpi_free to use kzfree instead of kfree because it is used to free
crypto keys.

Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tadeusz Struk 2015-06-15 13:18:36 -07:00 • committed by Herbert Xu
parent 4beb106045
commit d37e296979
3 changed files with 86 additions and 22 deletions
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6
lib/mpi/mpiutil.c
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@ -69,7 +69,7 @@ void mpi_free_limb_space(mpi_ptr_t a)
if (!a)
return;
kfree(a);
kzfree(a);
}
void mpi_assign_limb_space(MPI a, mpi_ptr_t ap, unsigned nlimbs)
@ -95,7 +95,7 @@ int mpi_resize(MPI a, unsigned nlimbs)
if (!p)
return -ENOMEM;
memcpy(p, a->d, a->alloced * sizeof(mpi_limb_t));
kfree(a->d);
kzfree(a->d);
a->d = p;
} else {
a->d = kzalloc(nlimbs * sizeof(mpi_limb_t), GFP_KERNEL);
@ -112,7 +112,7 @@ void mpi_free(MPI a)
return;
if (a->flags & 4)
kfree(a->d);
kzfree(a->d);
else
mpi_free_limb_space(a->d);