The Argentina international has spent 18 years with Barca but his future has been called into question after it emerged earlier this year he can leave Camp Nou for free at the end of any season.
Five-time Ballon d'Or winner Messi is officially contracted to the LaLiga champions until 2021, but Abidal is hopeful fresh terms can soon be agreed.
"They are already talking," he told Mundo Deportivo. "I do not know if we will have news soon because the decision will depend on the player, but for us as a club I hope it is sorted as soon as possible."
Asked when he expects an agreement to be announced, Abidal said: "It will be known when it is known, but I am positive."
Abidal also confirmed academy product Ansu Fati is in line for a contract extension, having impressed in his breakthrough campaign.
"We are also talking to him," Abidal said. "He is a young player that we have to protect. We have to talk to his family and representatives."