Test a build with only symmetric cryptography

[gilles-peskine-arm]

Description

We have no build with only symmetric cryptography anywhere in all.sh. In particular, we never build with MBEDTLS_BIGNUM_C disabled, which happens in the real world either when building with no asymmetric cryptography or when all the asymmetric cryptography comes from ALT implementations that don't use any bignum functions.

This could cause the mbedtls configuration config-ccm-psk-tls1_2.h to fail. As of 9ab7c07, mbed-crypto builds and passes TLS tests with config-ccm-psk-tls1_2.h, but the test_suite_asn1parse fails to build when MBEDTLS_ASN1_PARSE_C is enabled but MBEDTLS_BIGNUM_C is disabled.

We can't test every possible combination of build options, but we should test at least one configuration without the bignum module. I propose to test with all features that don't depend on MBEDTLS_BIGNUM_C.

Issue request type

[ ] Question
[x] Enhancement
[ ] Bug

[ciarmcom]

Internal Jira reference: https://jira.arm.com/browse/IOTCRYPT-951

[adbridge]

Apologies, this was closed in error by the automated bot - re-opening.