Are the mentioned hadiths authentic, and is there repentance for one who committed what is stated therein?

Homosexuality is one of the greatest abominations, and its punishments in this world and the hereafter are severe. It corrupts its perpetrator, and there is no hope for his reform. He must hasten to repentance, regret, and perform many good deeds. One who repents from a sin is like one who has no sin, and Allah transforms the evil deeds of the penitent into good deeds. The door of repentance is open to all sinners, and the conditions for repentance are to cease the sin, regret it, and resolve not to return to it. One who falls into sins should conceal himself with Allah's cover and repent to Him. The mentioned reports about the punishment for homosexuality have no basis in the books of Ahl al-Sunnah; rather, they are among the falsehoods of the Shi’a.