It allows weak hash algorithms to be used in PKCS7. It's only added in the
LTS branch for backward compatibility, but it's disabled by default because
that's the safest choice.
This commit also updates test data in order to test the new build symbol.
Signed-off-by: Valerio Setti <vsetti@baylibre.com>
Clarify that the 'sig_algs' set through this function are only enforced
during the key exchange and that 'mbedtls_ssl_conf_cert_profile()' should
instead be used to enforce the same algorithms when verifying certificates.
Signed-off-by: Valerio Setti <vsetti@baylibre.com>
This is not really necessary for 1.0+, but for the 3.6 branch where the
structure and these constants are still public, it is cleaner.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
The old functions only guaranteed an output in the range [-a * P, b * P]
for a and b "small enough".
The new functions have a stricter contract, allowing the final reduction
to be done efficiently in constant time.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
Platform entropy is available when `MBEDTLS_NO_PLATFORM_ENTROPY` is _not_
defined.
This caused the ok/not-supported behavior of `broke
psa_random_set_prediction_resistance() to be inverted, and the unit tests
checking that behavior to be similarly inverted, so the unit tests didn't
catch it.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Let applications configure prediction resistance at runtime.
Prediction resistance is always considered disabled when there is no actual
entropy source, only a nonvolatile seed.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
In some scenarios, application or integration code knows that the random
generator should be reseeded, but the reseed cannot or must not happen
immediately and there is no way to report errors. In such scenarios, users
can call the new function `psa_random_deplete()`, which just marks the DRBG
as needing a reseed.
This change requires DRBG modules to treat `reseed_counter == reseed_interval`
as a condition that requires a reseed. Historically they reseeded when
`reseed_counter > reseed_interval`, but that made it impossible to require
a reseed when `reseed_interval == MAX_INT`. Note that this edge case is not
tested.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Change `reseed_counter` to be the number of requests made since the last
reseed, rather than this number minus 1. Thus, reseed when
`reseed_counter >= reseed_interval` rather than
`reseed_counter > reseed_interval`. The field `reseed_counter` is private so
this is not an API change.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Define `MBEDTLS_ENTROPY_TRUE_SOURCES` and `MBEDTLS_ENTROPY_HAVE_SOURCES`
similarly to TF-PSA-Crypto 1.0. Also define
`MBEDTLS_ENTROPY_HAVE_TRUE_SOURCES` for test function dependencies.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Document when this is not used. This was the case in TF-PSA-Crypto 1.0.0,
but not yet in Mbed TLS 3.6.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
