tree b0206588a029bcb0b8280d57c3954a621ce06bb5
parent 769ce27f1209a3dda1382f8e3f32cdf43d177aa6
author Jaeden Amero <jaeden.amero@arm.com> 1546616017 +0000
committer Jaeden Amero <jaeden@patater.com> 1546957684 +0000

psa: Enable easier initialization of cipher operations

The struct psa_cipher_operation_s is built with a
mbedtls_cipher_context_t. The shape of mbedtls_cipher_context_t and an
initializer that works with Clang 5.0 and its
-Wmissing-field-initializers varies based on the configuration of the
library. Instead of making multiple initializers based on a maze of
ifdefs for all combinations of MBEDTLS_CIPHER_MODE_WITH_PADDING,
MBEDTLS_CMAC_C, and MBEDTLS_USE_PSA_CRYPTO, add a dummy variable to
psa_cipher_operation_s's union that encloses mbedtls_cipher_context_t.
This allows us to initialize the dummy with a Clang-approved initializer
and have it properly initialize the entire object.