The convicted terrorist known as the “underwear bomber” — who tried to blow up a Detroit-bound jet on Christmas in 2009 — says his constitutional rights are being violated at a federal prison in Colorado, where he’s allegedly being forced to eat food forbidden by his Muslim faith.

In a lawsuit filed last week in Colorado federal court, Umar Farouk Abdulmutallab claims he’s being housed in long-term solitary confinement at the 425-inmate supermax prison in Florence, and has been harassed by white supremacists who target Muslims, as well as being blocked from communicating with his relatives.

“Prison walls do not form a barrier separating prison inmate from the protections of the United States Constitution,” according to the 73-page lawsuit filed by Abdulmutallab, a Nigerian native who was sentenced to four life terms in prison in 2012 after pleading guilty to trying detonate a bomb hidden in his underwear on Northwest Airlines Flight 253 from Amsterdam to Detroit with nearly 300 people on board.

The lawsuit names US Attorney General Jeff Sessions and the Federal Bureau of Prisons, as well as 20 unidentified defendants. Spokespeople for the named defendants could not be reached for comment on Sunday, the Detroit Free Press reports.

Abdulmutallab, according to the lawsuit, has gone on a hunger strike to protest the alleged conditions, but says he has been repeatedly force-fed non-halal food. He also claims he’s enduring special administrative measures that block him from communicating with “more than 7.5 billion people, the vast majority of people on the planet,” according to the lawsuit.

The wannabe terrorist claims the constraints have restricted him from practicing his religion, a violation of the Religious Freedom Restoration Act, according to the lawsuit — which alleges he’s been blocked from participating in group prayer sessions and doesn’t have regular access to an imam inside the prison.

The lawsuit also claims Abdulmutallab was blocked from speaking with most of his relatives until last year, when he was permitted to communicate with his sister. Of roughly 154,000 inmates housed by the Bureau of Prisons, Abdulmutallab, according to the lawsuit, is among fewer than 30 who are subjected to special administrative measures.

His attorneys are seeking an injunction to keep Abdulmutallab out of solitary confinement and another to allow him to take part in group prayers along with an imam, Denver 7 reports.

“Prisoners retain fundamental constitutional rights to communicate with others and have family relationships free from undue interference by the government,” Abdulmutallab’s Boulder-based attorney, Gail Johnson, told Denver 7. “The restrictions imposed on our client are excessive and unnecessary, and therefore we seek the intervention of the federal court.”

Abdulmutallab, a then-25-year-old who was educated in Europe, told the government he trained in Yemen under the eye of Anwar al-Awlaki, a radical American-born cleric and top al Qaeda figure.

He tried to detonate a bomb on the Amsterdam-to-Detroit flight, but the device failed and badly burned him. He later confessed after being hauled off the plane.