yep

I mean how it works?

Recall from [RFC4253] that the encryption methods in each direction
  of an SSH connection MUST run independently of each other and that,
  when encryption is in effect, the packet length, padding length,
  payload, and padding fields of each packet MUST be encrypted with the
  chosen method.  Further recall that the total length of the
  concatenation of the packet length, padding length, payload, and
  padding MUST be a multiple of the cipher's block size when the
  cipher's block size is greater than or equal to 8 bytes (which is the
  case for all of the following methods).

padding is just to mask the ammount of payload in packet

random padding (not implemented by openSSH) gives you some extra protection from traffic analysis

that true,but difficult to find parameters.chacha20 poly1305 use encrypted 24 bytes packets with padding.

in deed, some cyphers have their own padding

what parameters are you looking for?

padding lengths

maan, I have no idea whats going on your screen

I think it's kind of demo app that extracts data from ssh server

>xato-net-10-million-passwords.txt
Hmm.

From some kind of greeting packet or somewhat

palevo

ah, I see

it  is decrypted packets of chacha20poly1305.but,problem is padding.

Next couple answers will be like "rtfm bruh, go get rfc"