PORT_ArenaAlloc
params->curveOID.data = (unsigned char *) PORT_ArenaAlloc(NULL, oid.len,
item->data = (unsigned char *) PORT_ArenaAlloc(arena, tmp/2, kmflag);
to->data = (unsigned char*) PORT_ArenaAlloc(arena, from->len,
result->data = PORT_ArenaAlloc(arena, len, kmflag);