:8], s1) byteorder.BEPutUint32(dst[8:12], s2) byteorder.BEPutUint32(dst[12:16], s3) } // Decrypt one block from src into dst, using the expanded key xk. func decryptBlockGeneric(c *blockExpanded, dst, src []byte) { checkGenericIsExpect() xk := c.dec[:] _ = src[15] // early bounds check s0 := byteorder.BEUint32(src[0:4]) s1 := byteorder.BEUint32(src[4:8]) s2 := byteorder.BEUint32(src[8:12]) s3 := byteorder.BEUint32(src[12:16]) // First round just XORs input with key. s0 ^= xk[0] s1 ^= xk[1] s2 ^=...