There is some confusion as to the difference between the Hawaiian hand greeting -- the Shaka -- and the American Sign Language "I love you" used as a general greeting.

The ASL gesture is palm outward with thumb, first finger and little finger upright and other two folded into the palm.
It is always done that way ... palm toward the other person.

The Shaka starts with the palm towards you and just the thumb and little finger upright, the other fingers folded into the palm. The back of the hand toward other person.
Now, the shaka has infinite variations and many meanings, some with palm out, some with different motions and is best left to those who know the variations, until you have learned! Pretty easy to pick up with close observation.
Aloha
wow