Same note as previous commit regarding guards.
Note that we could auto-enable MD_LIGHT only when SELF_TEST is defined,
and even only when SHA1_C is defined too, but somewhere down the line
we'll want to auto-enable it for the sake of other RSA function (not in
selftest and could use any hash), so there's little point in optimizing
the temporary condition, let's use the simple one upfront.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
Move all error translation utilities to psa_util.c.
Introduce macros and functions to avoid having
a local copy of the error translating function in
each place.
Identify overlapping errors and introduce a
generic function.
Provide a single macro for all error translations
(unless one file needs a couple of different ones).
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
We used to include platform.h only when MBEDTLS_PLATFORM_C was enabled, and
to define ad hoc replacements for mbedtls_xxx functions on a case-by-case
basis when MBEDTLS_PLATFORM_C was disabled. The only reason for this
complication was to allow building individual source modules without copying
platform.h. This is not something we support or recommend anymore, so get
rid of the complication: include platform.h unconditionally.
There should be no change in behavior since just including the header should
not change the behavior of a program.
This commit replaces most occurrences of conditional inclusion of
platform.h, using the following code:
```
perl -i -0777 -pe 's!#if.*\n#include "mbedtls/platform.h"\n(#else.*\n(#define (mbedtls|MBEDTLS)_.*\n|#include <(stdarg|stddef|stdio|stdlib|string|time)\.h>\n)*)?#endif.*!#include "mbedtls/platform.h"!mg' $(git grep -l '#include "mbedtls/platform.h"')
```
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Test coverage not there yet, as the entire test_suite_pkcs1_v21 is
skipped so far - dependencies to be adjusted in a future commit.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
This allows callers not to worry with md_info and makes it easier to
provide a PSA version for when MD_C is not available.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
This will also make it easier to provide a PSA-based version for when MD
is not available.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
Some of them no longer need md_ctx, some of those no longer need the
exit dance that was used to free it, or need it on a smaller scope.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
This is a first step towards making a version of this function that
uses PSA when MD is not available.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
Using static inline functions is bad for code size; the function from
md_internal.h was already used from 3 different C files, so already was
copied at least 3 times in the library, and this would only get worse
over time.
Use actual functions, and also share the actual data between them.
Provide a consistent set of operations. Conversion to/from
human-readable string was omitted for now but could be added later if
needed.
In the future, this can be used to replace other similar (inline)
functions that are currently scattered, including (but perhaps not
limited to):
- mbedtls_psa_translate_md() from psa_util.h
- mbedtls_md_info_from_psa() (indirectly) from psa_crypto_hash.h
- get_md_alg_from_psa() from psa_crypto_rsa.c
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
PKCS#1 v1.5 mostly does not need hash operations. This is a first step
towards allowing builds with PKCS#1 v1.5 only (no v2.1) without MD.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
These issues were flagged by Coverity as instances where a local
variable may be used prior to being initialized. Please note that
none of these changes fixes any particular bug, this is just an attempt
to add more robustness.
Signed-off-by: Leonid Rozenboim <leonid.rozenboim@oracle.com>
Zeroize temporary buffers used to sanity-check the signature.
If there is an error, overwrite the tentative signature in the output
buffer.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Tne unpadding part of `mbedtls_rsa_rsaes_pkcs1_v15_decrypt` function is
contant-time therefore it moved to a separate function to be prepared
for moving to the contant-time module.
Signed-off-by: gabor-mezei-arm <gabor.mezei@arm.com>
Remove a check in rsa_rsassa_pkcs1_v15_encode() that
is not needed because the same check is performed
earlier. This check was added in #4707.
Signed-off-by: David Horstmann <david.horstmann@arm.com>
Where hashlen was previously ignored when the hash length could be
inferred from an md_alg parameter, the two must now match.
Adapt the existing tests accordingly. Adapt the sample programs accordingly.
This commit does not add any negative testing.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
(This commit is best reviewed using `git show -b` as indentation levels
have changed.)
The documentation already states that the RNG parameter is mandatory,
since PRs #4488 and #4515. There are several families of functions to
consider here:
- private-key operations (sign, decrypt) all call
mbedtls_rsa_private() where this commit adds a non-NULL check;
- encrypt operations need an RNG for masking/padding and already had a
non-NULL check since #4515 (conditional on \p mode before that)
- verify operations no longer take an RNG parameter since #4515
So, after this commit, all RSA functions that accept an RNG will reach a
non-NULL check before the RNG is used.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
