By default, this feature is commented in include/mbedtls/config.h Uncommenting it is required to access the following functions: - mbedtls_cipher_cmac_starts - mbedtls_cipher_cmac_update - mbedtls_cipher_cmac_finish I'd love to have a method to do this.
This seems to have been fixed as of net-libs/mbedtls-2.28.0-r1