Net::SSH::Exception padding error

[shapkin]

I'm trying to connect to sFTP server:

Net::SFTP.start("SERVER_IP", "username", password: "password", non_interactive: true, verify_host_key: :never, verbose: :debug)

This generate the following error

Traceback (most recent call last):
        2: from (irb):7
        1: from (irb):8:in `rescue in irb_binding'
Net::SSH::Exception (padding error, need 1014469068 block 16)

Full traceback:

D, [2021-09-07T10:06:21.430019 #1064] DEBUG -- net.ssh.transport.session[10a2c]: establishing connection to SERVER_IP:22
D, [2021-09-07T10:06:21.497865 #1064] DEBUG -- net.ssh.transport.session[10a2c]: connection established
I, [2021-09-07T10:06:21.498017 #1064]  INFO -- net.ssh.transport.server_version[10a40]: negotiating protocol version
D, [2021-09-07T10:06:21.498123 #1064] DEBUG -- net.ssh.transport.server_version[10a40]: local is `SSH-2.0-Ruby/Net::SSH_6.1.0 x86_64-darwin20'
D, [2021-09-07T10:06:21.577049 #1064] DEBUG -- net.ssh.transport.server_version[10a40]: remote is `SSH-2.0-1.82_sshlib Globalscape'
I, [2021-09-07T10:06:21.577432 #1064]  INFO -- net.ssh.transport.algorithms[10a54]: sending KEXINIT
D, [2021-09-07T10:06:21.577613 #1064] DEBUG -- socket[10a68]: queueing packet nr 0 type 20 len 796
D, [2021-09-07T10:06:21.577711 #1064] DEBUG -- socket[10a68]: sent 800 bytes
D, [2021-09-07T10:06:21.645464 #1064] DEBUG -- socket[10a68]: read 320 bytes
D, [2021-09-07T10:06:21.645614 #1064] DEBUG -- socket[10a68]: received packet nr 0 type 20 len 316
I, [2021-09-07T10:06:21.645725 #1064]  INFO -- net.ssh.transport.algorithms[10a54]: got KEXINIT from server
I, [2021-09-07T10:06:21.645811 #1064]  INFO -- net.ssh.transport.algorithms[10a54]: negotiating algorithms
D, [2021-09-07T10:06:21.646099 #1064] DEBUG -- net.ssh.transport.algorithms[10a54]: negotiated:
* kex: diffie-hellman-group-exchange-sha256
* host_key: ssh-rsa
* encryption_server: aes256-ctr
* encryption_client: aes256-ctr
* hmac_client: hmac-sha2-512
* hmac_server: hmac-sha2-512
* compression_client: none
* compression_server: none
* language_client: 
* language_server: 
D, [2021-09-07T10:06:21.646160 #1064] DEBUG -- net.ssh.transport.algorithms[10a54]: exchanging keys
D, [2021-09-07T10:06:21.646321 #1064] DEBUG -- socket[10a68]: queueing packet nr 1 type 34 len 20
D, [2021-09-07T10:06:21.646403 #1064] DEBUG -- socket[10a68]: sent 24 bytes
D, [2021-09-07T10:06:21.753629 #1064] DEBUG -- socket[10a68]: read 280 bytes
D, [2021-09-07T10:06:21.753795 #1064] DEBUG -- socket[10a68]: received packet nr 1 type 31 len 276
D, [2021-09-07T10:06:21.759496 #1064] DEBUG -- socket[10a68]: queueing packet nr 2 type 32 len 268
D, [2021-09-07T10:06:21.759625 #1064] DEBUG -- socket[10a68]: sent 272 bytes
D, [2021-09-07T10:06:21.840618 #1064] DEBUG -- socket[10a68]: read 848 bytes
D, [2021-09-07T10:06:21.840866 #1064] DEBUG -- socket[10a68]: received packet nr 2 type 33 len 828
D, [2021-09-07T10:06:21.843114 #1064] DEBUG -- socket[10a68]: queueing packet nr 3 type 21 len 20
D, [2021-09-07T10:06:21.843202 #1064] DEBUG -- socket[10a68]: sent 24 bytes
D, [2021-09-07T10:06:21.843270 #1064] DEBUG -- socket[10a68]: received packet nr 3 type 21 len 12
D, [2021-09-07T10:06:21.843504 #1064] DEBUG -- net.ssh.authentication.session[10a7c]: beginning authentication of `username'
D, [2021-09-07T10:06:21.843647 #1064] DEBUG -- socket[10a68]: queueing packet nr 4 type 5 len 28
D, [2021-09-07T10:06:21.843727 #1064] DEBUG -- socket[10a68]: sent 96 bytes
D, [2021-09-07T10:06:22.019387 #1064] DEBUG -- socket[10a68]: read 160 bytes
Traceback (most recent call last):
        2: from (irb):7
        1: from (irb):8:in `rescue in irb_binding'
Net::SSH::Exception (padding error, need 1014469068 block 16)

System configuration
ruby 2.7.1p83 (2020-03-31 revision a0c7c23c9c) [x86_64-darwin20]
net-ssh 6.1.0
net-sftp 3.0.0

[emnabarred]

do you still have issues with this ? @shapkin

[delaneygqltrcs]

I'm seeing this same issue. Did you figure it out @shapkin? @emnabarred do you have any idea how to fix this?

[coffenbacher]

Also seeing this, happened after recently updating net-ssh, still looking for a root cause...

[coffenbacher]

Upgrading to this beta version seems to have helped!

gem 'net-ssh', '~> 7.0.0.beta1', require: 'net/ssh'

seems related to net-ssh/net-ssh#864 and net-ssh/net-ssh#847

[h0jeZvgoxFepBQ2C]

still happening with the latest released version :(