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Questions tagged [rsa]

195 questions
566
votes
33 answers

How do I tell Git for Windows where to find my private RSA key?

My Git setup runs fine on Linux, but when I try to set things up under Windows (using Git for Windows and TortoiseGit), I don't know where to put my private SSH key (or, better still, how to tell ssh where it's located). I'm using the standard…
binaryorganic
  • 6,141
208
votes
3 answers

Possible to change email address in keypair?

I've created an RSA keypair that I used for SSH, and it includes my email address. (At the end of the public key.) I've now changed my email address. Is it possible to change the email address on the key, or is it part of the key and I would have to…
Ram Rachum
  • 5,411
166
votes
5 answers

How to check if an RSA public / private key pair match

I have two files, id_rsa and id_rsa.pub. What command can be used to validate if they are a valid pair?
Ryan
  • 6,271
156
votes
35 answers

SSH Suddenly returning Invalid format

So a while ago I set up a server on AWS, and used their generated SSH key. I saved the key to Lastpass, and have successfully retrieved it from there before, and got it working. However, after trying that again today, I can't get it to…
Gregor Menih
  • 1,663
108
votes
5 answers

SSH keypair generation: RSA or DSA?

SSH supports two signature algorithms for key pairs: RSA and DSA. Which is preferred, if any? For RSA, what is the minimum acceptable key length?
Brad Ackerman
  • 2,251
103
votes
1 answer

How do I validate an RSA SSH public key file (id_rsa.pub)?

Is there a command I can use to verify the public key (id_rsa.pub), just the format only. Sometimes I have added a new linebreak, sometimes the file missed the ssh-rsa prefix, so is there a command to validate with?
Ryan
  • 6,271
81
votes
6 answers

How to remove strict RSA key checking in SSH and what's the problem here?

I have a Linux server that whenever I connect it shows me the message that changed the SSH host key: $ ssh root@host1 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ …
setatakahashi
  • 1,547
55
votes
10 answers

Auto accept rsa key fingerprint from command line

I've tried yes | ssh root@10.x.x.x to try to accept the RSA key fingerprint, but am still prompted if I'm sure I want to connect. Is there a way to make this automatic?
VenomFangs
  • 807
50
votes
3 answers

How to use openssh sftp command with a RSA/DSA key specified from the command line

The Openssh ssh and scp command provied an -i command line option to specify the path to the RSA/DSA key to be used for authentication. Looking at the sftp man pages I was not able to find a way to specify the RSA/DSA key. I am looking for a way to…
Adi Roiban
  • 833
22
votes
4 answers

How do I import a RSA SSH key into GPG as the _primary_ private key?

I currently have a SSH key that I've used for a while and I'd like to start using GnuPG with a new keyring. However, given that I've used my key for ages, I would like to still use that key in GPG as the main/primary key. I've tried importing the…
SineSwiper
  • 2,698
20
votes
11 answers

OpenVPN easy-rsa build-key automation?

I have a lot of keys to generate for my clients VPN server. Whenever I use easy-rsa to generate the keys like this: ./build-key client1 There is some output with a series of questions. The questions all have default answers that are defined in the…
Jake Wilson
  • 9,133
19
votes
7 answers

SSH connection asks for password although key is accepted

I'm getting prompted for a password even though it looks like my SSH key is accepted. As far as I can tell, the line "Server accepts key: pkalg ssh-rsa blen 277" in the logs below mean my key is accepted. Here are debug logs: debug1: Next…
SamStephens
  • 291
18
votes
5 answers

Using PGP keys for SSH

I use a 4096 byte RSA PGP key; since SSH also uses the RSA standard, is it at all possible to use the PGP key as an SSH key without installing additional software on the server (and as little as possible on the client)?
user18725
  • 181
17
votes
2 answers

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
  • 1,081
15
votes
4 answers

How to set up my own full-featured certificate authority?

I'd like to set up a certificate authority, which I can then import to all the company's browsers and systems to get rid of all those nasty client warnings when using HTTPS or SSL.
Ivan
  • 3,432
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