gosaml2 CBC Padding Panic — Unauthenticated Process Crash

Summary The AES-CBC decryption path in DecryptBytes panics on crafted ciphertext whose plaintext is all zero bytes. After decryption, bytes.TrimRightdata, "\x00" empties the slice, then datalendata-1 panics with index out of range -1. There is no recover in the library. The panic propagates throu...