Torture is not an intrinsic evil. The word “torture”, all by itself, has not been qualified specifically enough to be considered intrinsically evil.
Just like “killing a man” is not intrinsically evil. We can kill in self-defense, which is not a sin, therefore the KIND of killing needs to be specified.
“Murder” is intrinsically evil because we know that means “killing an innocent man”.
“Suicide” is intrinsically evil because we know that means “killing oneself”.
Torture is certainly evil if it is done with an end of attaining sadistic pleasure, or for unjust reasons. It is not evil if used ordinately with the end of obtaining needed information from an uncooperative prisoner of war, when the war in question is a just war.
A relevant passage from the CCC:
Note the cases in which torture is deemed “contrary to respect for the person and for human dignity”:
- physical or moral violence to extract confessions
- punish the guilty
- frighten opponents
- satisfy hatred
Note that this does not forbid using torture during times of war to extract needed information, and
more importantly, it does not state that torture is unequivocally contrary to the moral law (i.e. intrinsically evil.)