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Questions tagged [rsa]

190 questions
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What do the different parts of "known_hosts" entries mean?

Below is an known_hosts entry. The part that starts with ssh-rsa and goes to the end is a public key. What are the other parts (the characters before ssh-rsa)? |1|KnbIIJIPrL/1p7ofUV74sK+j/Gc=|wrjOFnPgoF0afgH0PeRtRqSdgvc= ssh-rsa …
Emanuil Rusev
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12
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2 answers

Cannot decrypt private key eventhough I know passphrase

I think my problem comes down to the fact something is wrong with the key but I cannot just decrypt it, for further investigation, with out parsing it. But I am not sure. I am trying to use standard method: openssl rsa -in ./id_rsa -out…
luk32
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1 answer

ssh - Why isn't it trying my private key?

I'm trying to connect to a remote SSH server using a private key at ~/.ssh/id_rsa. When I ssh -v to the server I get the following: ... debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1:…
Martin
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ssh: id_rsa doesn't work, but if I rename it, it works

I have this id_rsa in my ~/.ssh folder. But it just doesn't authenticate. If I copy it and rename it to anything not id_rsa, it works. [qfan@mycomputer .ssh]$ ls -al id_rsa id_rsa_good -rw------- 1 qfan qfan 1766 Dec 3 18:35 id_rsa -rw------- 1…
Qi Fan
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10
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4 answers

OpenSSH : Key-based authorization, maximum key length

I'am using Putty on windows with key-based authentication to access some of mine servers. It works totally fine with ~3700-bit key, but with ~17000-bit key it thinks for like 20 seconds on client-side and then just says "Access denied" and asks for…
BarsMonster
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10
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10 answers

sshd shuts down with "No supported key exchange algorithms" error

sshd $ /usr/sbin/sshd -f testconfig -p 22025 -d debug1: sshd version OpenSSH_5.2p1 debug1: private host key: #0 type 0 RSA1 debug1: read PEM private key done: type RSA debug1: private host key: #1 type 1 RSA debug1: read PEM private key done: type…
Dmitry Gladkov
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9
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4 answers

What does this ssh error mean?

This is my last resort. I've been trying to figure out the problem here for hours. Here's the deal: I have copied my private key from machine #1 onto machine #2. Machine #1 is able to connect via ssh to a server with my public key just fine, but…
kevin
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SSH keys: why is id_rsa larger than id_rsa.pub?

My private key (~/.ssh/id_rsa) is a 1766-byte file, but my public key (~/.ssh/id_rsa.pub) is only 396 bytes in length. Why the massive difference? Is it because the private key is encrypted using AES? Isn't AES ciphertext usually around the same…
splicer
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2 answers

Is disabling password login for SSH the same as deleting the password for all users?

I have a cloud server with only a root user. I SSH to it using RSA keys only. To make it more secure, I wanted to disable the password feature. I know that this can be done by editing the /etc/ssh/sshd_config file and changing PermitRootLogin yes to…
Arsham Skrenes
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4 answers

The RSA key container could not be opened. Windows Server 2008 R2

I am setting up a second asp.net site on our Windows 2008 R2 server. We use a RSA Key Container to encrypt our connection strings. I created a new Application Pool with all the same settings as our Default Application Pool that is supporting our…
Blegger
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5 answers

Recover an SSH private key?

I have an RSA key (generated by PuTTYgen) that's set up for logging in to a bunch of machines via SSH. Or rather, i HAD such a key. (The computer it was on crashed, to the point that a reinstall of XP was required. The private key file is…
cHao
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SSH keys: ed25519 vs RSA performance demystified

It is claimed that ed25519 keys are better than RSA, in terms of security and performance. In terms of security, I understand that 4096 bits RSA keys are practically unbreakable for the foreseable future, so I am not asking about that. What I would…
a06e
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Unable to login(ssh) with public private key pair

I am unable to login with public private key pairs. I do have access with a password. Following are the logs on server side and on the client side. Why am I unable to login? type=CRYPTO_KEY_USER msg=audit(1481731455.027:102046): user pid=8859 uid=0…
raju
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2 answers

Same RSA key on multiple PCs

Can I use my RSA private key on multiple computers i.e. my desktop and laptop. Or do I have to create a unique key for each computer I own, and add their respective public keys to necessary servers/programs.
Tom
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Is the ssh key name a part of the authentication?

The ssh public keys in authorized_hosts have three parts - a type, the key and a name. For example, an rsa key might look like: ssh-rsa gn29JyDdiyLFlggptrCxgzS6diAF6o94DtgoF9grbm7g+Mtrly NAME1 Will the same key be valid with a…
Adam Matan
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