#ssh-key

[minhphong306]

[TIL] Thêm SSH key lên server nhanh chóng

Dạo này mình phải làm việc với nhiều con VPS khác nhau. Cứ dùng username với password thì nông dân quá. Đúng ra là dùng ssh key, mà cứ lười. Nay google thử và note lại: Continue reading [TIL] Thêm SSH key lên server nhanh chóng

[minhphong306]

[TIL] - Fix lỗi WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED khi host change key

Gần đây GitHub có incident phải update RSA SSH host key nên lúc pull hoặc push bạn sẽ gặp lỗi như này: (more…) “”

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[blog1awwwcom]

Server-Inhaber: SSH-Server ordentlich absichern

Server-Inhaber: SSH-Server ordentlich absichern

VORSICHT: Server-Inhaber sollten Ihren Root-Server-Zugang ordentlich absichern!

Wer dies nicht macht, muß damit rechnen, daß der Server gehackt wird und für eine Phishing-Attacke mißbraucht wird und daß kann für den Server-Betreiber richtig teuer werden!

So sichern Sie Ihren Server ab: (more…)

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[yummycoding]

Validating ssh public keys is easy!

If you want to know if a (say, user-supplied) ssh public key is valid, this is easy to do.

The keys have a standard format which is:

key-type base64-encoded-key comment

The base64 encoded key, when decoded, yields a string beginning with four bytes describing an integer (big-endian). That integer states the length of a string immediately following. In nearly all cases, it's going to be a ssh-rsa key and look something like this:

00 00 00 07 73 73 68 2d 72 73 61 00 ....ssh-rsa.

Here's an implementation in Python. All of the imported modules are in the standard library.

def is_valid_key(content): import struct, base64, binascii try: key_type, key_string, comment = content.split() data = base64.decodestring(key_string) int_len = 4 str_len = struct.unpack('>I', data[:int_len])[0] return data[int_len:int_len+str_len] == key_type except binascii.Error: return False except ValueError, err: if 'unpack' in err.message: return False raise

[cliffnotas]

GitHub - Multiple SSH Keys

STEPS

Step 1 - Creating SSH (once entered you'll be prompted with desired filename, i've chosen id_rsa_whatever, will also ask a desired passphrase)

ssh-keygen -t rsa -C "your-email-address"

Step 2 - Do this, not sure why.

eval "$(ssh-agent -s)"

Step 3 - copy ssh-key to clipboard

pbcopy < ~/.ssh/id_rsa_whatever.pub

Step 4 - Paste key into github profile account (go to github.com, login got to settings, SSH-Key then add)

Step 5 - Add github user

ssh-add ~/.ssh/id_rsa_whatever

To use different users you'll need to make seperate keys as the Steps show above. Then you'll need to do the last step to switch github users when writing git commands from the command line. So if I wanted to push with git as a different user, I'd need to from the command line write:

ssh-add ~/.ssh/id_rsa_whateverothers