diff options
| author | Tadeusz Struk <tadeusz.struk@intel.com> | 2015-06-15 23:18:36 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-06-16 09:35:06 +0300 |
| commit | d37e296979ed1652aec6850e2d736bd0ebf0cdb1 (patch) | |
| tree | 6f26c2f3a80bbf2e04c3be67edb22631d705de95 /include/linux/mpi.h | |
| parent | 4beb106045976b785a05e77ab5430ad04b6038b7 (diff) | |
| download | linux-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.h | 15 |
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 */ |