what does it mean, or what is Cg==

Question

Could someone tell me what Cg== means, I just know it's related to Base64.

I have searched but I still don't have a correct answer or an idea of ​​what it is, and I don't have much knowledge about base64

Spawn

Not sure what you mean, but if you decode cg== you get the letter r – Dogeared

As you are new to this site, please read stackoverflow.com/help/how-to-ask before posting. Show us what you have tried to help us help you. – Mercia

Answer 1

Cg== is the base64 encode of the new line character in the latest position. So if you want to encode ABC you will get QUJD, however if you include a "return character" after ABC you will get QUJDCg==.

Unrivaled

Answer 2

You can use hexdump or xxd to reveal the actual value of the character in hexadecimal. In the case of Cg==, it's a linefeed (0A) which can be verified with the following:

❯ echo -n "Cg==" | base64 -d | hexdump -C
00000000  0a                                                |.|
00000001

Exclamation

Answer 3

In my experience Cg== arises from passing a string (usually credentials) to base64 using echo (without the -n switch and thus appending the default newline character at the end) rather than e.g. with printf.

Cocteau