Manhole : ssh_dispatch_run_fatal: Connection to ::1 port 9000: Invalid key length

[Zjemm]

Description

unable to connect to manhole after enabling it in homeserver.yml

ssh_dispatch_run_fatal: Connection to ::1 port 9000: Invalid key length

Steps to reproduce

• enable the manhole part in the config
• restart synapse
• try to connect to manhole

this results in: ssh_dispatch_run_fatal: Connection to ::1 port 9000: Invalid key length

Version information

ssh version (1:7.7p1-2).
synapse version : 0.30.0.1
running on debian testing

[nkbai]

use ssh-keygen generate a rsa 1024 private key to replace synapse.util.manhole.py
for example:
PUBLIC_KEY ="ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAAAgQDnWgGzx9pRh9cc+qRHUOamvvVmm05nDW5c38AyOjWLIj+bRyGORKZqPzBIibBbP5xo/LsLObkkYy4F1Ou4sRJRgp544TIAhyfH2EP4PMHQfXRTLVH/TPKBxEs3X0Aovp9dExZRSAaqEKCBWHyf8E9jniLNnOF1sK9AD8cXHpn0Qw== [email protected]"

PRIVATE_KEY = """-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----"""

then it works

[richvdh]

I believe this was fixed by #3841.