pub unsafe extern "C" fn Tss2_Sys_Sign_Prepare(
    sysContext: *mut TSS2_SYS_CONTEXT,
    keyHandle: TPMI_DH_OBJECT,
    digest: *const TPM2B_DIGEST,
    inScheme: *const TPMT_SIG_SCHEME,
    validation: *const TPMT_TK_HASHCHECK
) -> TSS2_RC