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authorTadeusz Struk <tadeusz.struk@intel.com>2015-06-15 23:18:36 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2015-06-16 09:35:06 +0300
commitd37e296979ed1652aec6850e2d736bd0ebf0cdb1 (patch)
tree6f26c2f3a80bbf2e04c3be67edb22631d705de95 /include/linux/mpi.h
parent4beb106045976b785a05e77ab5430ad04b6038b7 (diff)
downloadlinux-d37e296979ed1652aec6850e2d736bd0ebf0cdb1.tar.xz
MPILIB: add mpi_read_buf() and mpi_get_size() helpers
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>
Diffstat (limited to 'include/linux/mpi.h')
-rw-r--r--include/linux/mpi.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/mpi.h b/include/linux/mpi.h
index 5af1b81def49..641b7d6fd096 100644
--- a/include/linux/mpi.h
+++ b/include/linux/mpi.h
@@ -81,6 +81,8 @@ MPI mpi_read_from_buffer(const void *buffer, unsigned *ret_nread);
int mpi_fromstr(MPI val, const char *str);
u32 mpi_get_keyid(MPI a, u32 *keyid);
void *mpi_get_buffer(MPI a, unsigned *nbytes, int *sign);
+int mpi_read_buffer(MPI a, uint8_t *buf, unsigned buf_len, unsigned *nbytes,
+ int *sign);
void *mpi_get_secure_buffer(MPI a, unsigned *nbytes, int *sign);
int mpi_set_buffer(MPI a, const void *buffer, unsigned nbytes, int sign);
@@ -142,4 +144,17 @@ int mpi_rshift(MPI x, MPI a, unsigned n);
/*-- mpi-inv.c --*/
int mpi_invm(MPI x, MPI u, MPI v);
+/* inline functions */
+
+/**
+ * mpi_get_size() - returns max size required to store the number
+ *
+ * @a: A multi precision integer for which we want to allocate a bufer
+ *
+ * Return: size required to store the number
+ */
+static inline unsigned int mpi_get_size(MPI a)
+{
+ return a->nlimbs * BYTES_PER_MPI_LIMB;
+}
#endif /*G10_MPI_H */