I'm trying to get Matthew Wall's sftp extension working with weeex 3.9.2 on
my Raspberry Pi 4.0. It's a patched up to date version of Raspbian, but I
get the following error on upload to an sftp server:
Apr 27 13:10:19 rhubarb weewx[12591]: imagegenerator: Generated 13 images
for StandardReport in 0.49 seconds
Apr 27 13:10:19 rhubarb weewx[12591]: copygenerator: copied 14 files to
/var/www/html/weewx
Apr 27 13:10:19 rhubarb weewx[12591]: reportengine: Caught unrecoverable
exception in generator 'user.sftp.SFTPGenerator'
Apr 27 13:10:19 rhubarb weewx[12591]: **** not a valid DSA private
key file
Apr 27 13:10:19 rhubarb weewx[12591]: **** Traceback (most recent
call last):
Apr 27 13:10:19 rhubarb weewx[12591]: **** File
"/usr/share/weewx/weewx/reportengine.py", line 204, in run
Apr 27 13:10:19 rhubarb weewx[12591]: **** obj.start()
Apr 27 13:10:19 rhubarb weewx[12591]: **** File
"/usr/share/weewx/weewx/reportengine.py", line 300, in start
Apr 27 13:10:19 rhubarb weewx[12591]: **** self.run()
Apr 27 13:10:19 rhubarb weewx[12591]: **** File
"/usr/share/weewx/user/sftp.py", line 259, in run
Apr 27 13:10:19 rhubarb weewx[12591]: **** n = uploader.run()
Apr 27 13:10:19 rhubarb weewx[12591]: **** File
"/usr/share/weewx/user/sftp.py", line 103, in run
Apr 27 13:10:19 rhubarb weewx[12591]: **** cnopts=cnopts)
Apr 27 13:10:19 rhubarb weewx[12591]: **** File
"/usr/local/lib/python2.7/dist-packages/pysftp/__init__.py", line 142, in
__init__
Apr 27 13:10:19 rhubarb weewx[12591]: ****
self._set_authentication(password, private_key, private_key_pass)
Apr 27 13:10:19 rhubarb weewx[12591]: **** File
"/usr/local/lib/python2.7/dist-packages/pysftp/__init__.py", line 171, in
_set_authentication
Apr 27 13:10:19 rhubarb weewx[12591]: **** private_key_file,
private_key_pass)
Apr 27 13:10:19 rhubarb weewx[12591]: **** File
"/usr/local/lib/python2.7/dist-packages/paramiko/pkey.py", line 206, in
from_private_key_file
Apr 27 13:10:19 rhubarb weewx[12591]: **** key =
cls(filename=filename, password=password)
Apr 27 13:10:19 rhubarb weewx[12591]: **** File
"/usr/local/lib/python2.7/dist-packages/paramiko/dsskey.py", line 65, in
__init__
Apr 27 13:10:19 rhubarb weewx[12591]: ****
self._from_private_key_file(filename, password)
Apr 27 13:10:19 rhubarb weewx[12591]: **** File
"/usr/local/lib/python2.7/dist-packages/paramiko/dsskey.py", line 224, in
_from_private_key_file
Apr 27 13:10:19 rhubarb weewx[12591]: **** data =
self._read_private_key_file("DSA", filename, password)
Apr 27 13:10:19 rhubarb weewx[12591]: **** File
"/usr/local/lib/python2.7/dist-packages/paramiko/pkey.py", line 279, in
_read_private_key_file
Apr 27 13:10:19 rhubarb weewx[12591]: **** data =
self._read_private_key(tag, f, password)
Apr 27 13:10:19 rhubarb weewx[12591]: **** File
"/usr/local/lib/python2.7/dist-packages/paramiko/pkey.py", line 289, in
_read_private_key
Apr 27 13:10:19 rhubarb weewx[12591]: **** raise
SSHException("not a valid " + tag + " private key file")
Apr 27 13:10:19 rhubarb weewx[12591]: **** SSHException: not a
valid DSA private key file
Apr 27 13:10:19 rhubarb weewx[12591]: **** Generator terminated
I installed the extension as per Matthew's instructions here:
https://github.com/matthewwall/weewx-sftp
My weewx.conf section is as follows:
[[SFTP]]
skin = sftp
user = pdunphy
private_key = /root/.ssh/id_ed25519
server = palang.ca
port = 9999
path = public_html
The error suggests paramiko might not be handling the key properly. I am
using Ed25519 elliptic curve cryptography that I thought should work. I'd
use regular RSA, but the "guy on the other end" wants Ed25519. Should this
work, or is it limited to RSA/DSA cryptography?
Or . . . am I missing something else?
Paul VE1DX
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