mbedtls/include
Hanno Becker c4e4210aab Introduce md_internal.h
Recall that in the default configuration, Mbed TLS provides access
digest implementations through two layers of indirection:

1) Call of MD API (e.g. mbedtls_md_update())
2) Call of function pointer from MD info structure
3) Actual digest implementation (e.g. mbedtls_sha256_update()).

Ideally, if only a single digest is enabled - say SHA-256 - then calling
mbedtls_md_update() should _directly_ jump to mbedtls_sha256_update(),
with both layers of indirection removed. So far, however, setting
MBEDTLS_MD_SINGLE_HASH will only remove the second - function pointer -
layer of indirection, while keeping the non-inlined stub implementations
of e.g. mbedtls_md_update() around.

This commit is a step towards allowing to define implementations of
the MD API as `static inline` in case we know that they are so small
that they should be defined in md.h and not in md.c.

In a nutshell, the approach is as follows: For an MD API function
mbedtls_md_xxx() that should be inlin-able, introduce its implementation
as a `static inline` wrapper `mbedtls_md_xxx_internal()` in md.h,
and then define mbedtls_md_xxx() either in md.h or in md.c, by just
calling mbedtls_md_xxx_internal().

Moving the implementations of those MD API functions that should be
inlinable to md.h requires the presence of both the MD info struct
and all specific digest wrapper functions in md.h, and this is what
this commit ensures, by moving them from md.c into a new internal
header file md_internal.h. Implementing the aforementioned wrappers for
those MD API that should be inlinable is left for subsequent commits.
2019-09-09 09:45:57 +01:00
..
mbedtls Introduce md_internal.h 2019-09-09 09:45:57 +01:00
tinycrypt Consistently use the name tinycrypt over uecc 2019-05-09 11:24:11 +02:00
.gitignore
CMakeLists.txt Merge branch 'mbedtls-2.16' into baremetal 2019-06-18 09:00:37 +01:00