free_soft_ctx
free_soft_ctx(get_sp(&session_p->digest), OP_DIGEST);
free_soft_ctx(get_sp(&session_p->sign), OP_SIGN);
free_soft_ctx(get_sp(&session_p->verify), OP_VERIFY);
free_soft_ctx(get_sp(&session_p->sign), OP_SIGN);
free_soft_ctx(session_p, opflag);
free_soft_ctx(session_p, OP_DIGEST);
void free_soft_ctx(void *s, int opflag);
free_soft_ctx(get_sp(&session_p->verify), OP_VERIFY);