blowfish | Blowfish Encryption Algorithm Implementation in CPP | Encryption library

I have a Python 3 application running on CentOS Linux 7.7 executing SSH commands against remote hosts. It works properly but today I encountered an odd error executing a command against a "new" remote server (server based on RHEL 6.10):

encountered RSA key, expected OPENSSH key

Executing the same command from the system shell (using the same private key of course) works perfectly fine.

On the remote server I discovered in /var/log/secure that when SSH connection and commands are issued from the source server with Python (using Paramiko) sshd complains about unsupported public key algorithm:

userauth_pubkey: unsupported public key algorithm: rsa-sha2-512

Note that target servers with higher RHEL/CentOS like 7.x don't encounter the issue.

It seems like Paramiko picks/offers the wrong algorithm when negotiating with the remote server when on the contrary SSH shell performs the negotiation properly in the context of this "old" target server. How to get the Python program to work as expected?

Python code

I had to install bcrypt, but fell into errors. I tried most of the solutions I found. There are many threads, but I haven't seen many of them for Mac. Here is what I've got from my terminal:

I have a problem. For my project, I need to move files from the directory to the mega cloud. But when trying to run the code, it gives an error. Also when trying to pip install mega.py it turns out the following:

I am attempting to convert my Java Blowfish encryption algorithm into Python. I am using the blowfish package which takes the same parameters as the Java library. They both execute successfully, however, I do not get the same result back.

I would like to use GPG without Gpg4win installed on Windows because Git for Windows includes the binary for GPG we well, so I would like to use it instead of installing an extra application.

However, when I setup the GPG (e.g adding Path etc), I have encountered the following error:

I have something like this:

Obviously this is an overly minimal example so the question of why I would want to do these types specifically is irrelevant.

After Rekeying, _read_all receives string of len(0) and closes connection. What can i do to solve this. Please find the debug log and stack trace below.

I am very new to AWS ec2, using linux, and using scp commands, just to get that out of the way. I have an AWS ec2 instance set up and want to upload a python file to that instance using an scp server command. The command I am using is scp -i C:\Users\Mason Choi\django_market_predict\Anchor_training_key_pair.pem C:\Users\Mason Choi\django_market_predict\mysite\train.py ec2-user@ec2-54-83-108-233.compute-1.amazonaws.com:/home/ec2-user

The error message I get when trying to use this command in my terminal (windows cmd) is

My scenario is that I have a Spring Integration Flow with a SftpInboundAdapter which shall get a file from a SftpServer "myHost". The file contains JSON which is to be converted into MyEvent entities to be forwarded to further processing. The process is implemented in a task scheduled by Spring Scheduler. Therefore the Integration Flow is not to start automatically with the Application having that autoStartup(false).

The Spring Integration Flow is:

• testSftpSessionFactory: to provide the session to the SFTP server
• testSftpInboundAdapter: to get the SFTP remote file
• sftpInputChannel: a Publish-Subscribe channel to have multiple message consumers
• sftpInputChannel-MessageHandler: to get the JSON content of the file transformed
• deleteLocalFileService-MessageHandler: to delete the remote file after successful processing
• controlChannel: to send Integration Flow control commands
• controlChannel-ExpressionControlBusFactoryBean: to start the testSftpInboundAdapter

The types TransferContext, TransferChannel and MyService are Java classes of mine with some fields fed from YAML properties which provide values for the sftpSessionFactory as host, port, user, password and the sftpInboundAdapter as remoteDirectory, remoteFilename, preserveTimestamp, localDirectory, etc. The Service is to process the MyEvent entities.

These are my SI beans: