The cloud of corruption hanging over Gov. Andrew Cuomo just got darker still: A federal court jury Thursday convicted all defendants on all charges in a bid-rigging scheme involving the governor’s Buffalo Billion program.

Like the earlier conviction of Cuomo’s self-professed “brother,” Joe Percoco, the verdict is a permanent taint on the governor’s honor and judgment — and the ethical standards he sets.

Alain Kaloyeros, the longtime SUNY Polytechnic Institute president described by Cuomo as New York’s “secret weapon,” stands guilty of steering hundreds of millions in state contracts to clients of Cuomo-connected lobbyist Todd Howe.

Also convicted: three former executives of those firms — companies that gave heavily to Cuomo’s campaigns.

Since The Post broke the news of the investigation three years ago, a flood of details has exposed appalling corruption in Buffalo Billion, the linchpin of Cuomo’s “economic development” plan for Upstate.

Corrupt, and a bust: Hundreds of millions went into white-elephant projects: a $750 million solar-panel plant, a $55 million innovation center and a $15 million film hub. In the end, they failed to yield the cornucopia of jobs Cuomo so enthusiastically promised.

Nor has he learned: Even with two of his closest associates caught lining their pockets while greasing the skids for his donors, he reneged on his vows to reform his development programs.

He’s even still taking donations from firms seeking to do business with the state.

Andrew Cuomo took office vowing to be the governor who would finally clean up Albany’s cesspool. Instead, his administration has been mired in pay-to-play scandals involving some of his closest associates.

Cuomo can keep claiming to have “zero tolerance for abuse of the public trust,” but the record shows that’s bunk.