# My use cases for CyberChef

### Formatting MAC addresses

Cisco seems to require a different format for every solution they have. I use this almost daily, so change the format of one or multiple MAC addresses.

Input:
`aa-aa-aa-bb-bb-bb`

Output:
```
aaaaaabbbbbb
AAAAAABBBBBB
aa-aa-aa-bb-bb-bb
AA-AA-AA-BB-BB-BB
aa:aa:aa:bb:bb:bb
AA:AA:AA:BB:BB:BB
aaaa.aabb.bbbb
AAAA.AABB.BBBB
```

[Try it yourself](https://baked.brrl.net/#recipe=Format_MAC_addresses('Both',true,true,true,true,false)&input=YWEtYWEtYWEtYmItYmItYmI)

**Tipp**: the easiest way to change the format of multiple formats, is to choose the desired format, input 1 MAC address per line, and remove the empty lines with a `Find/ Replace` operation with the following regex search `^(?:[\t ]*(?:\r?\n|\r))+`. For more information, visit [this post](https://ittavern.com/cyberchef-how-to-remove-empty-lines/).


### Looking up Linux permissions

Simple way to switch between various representations and shows the permissions.

Input:
`-rw-r--r--`


Output:
```
Textual representation: -rw-r--r--
Octal representation:   0644
File type: Regular file

 +---------+-------+-------+-------+
 |         | User  | Group | Other |
 +---------+-------+-------+-------+
 |    Read |   X   |   X   |   X   |
 +---------+-------+-------+-------+
 |   Write |   X   |       |       |
 +---------+-------+-------+-------+
 | Execute |       |       |       |
 +---------+-------+-------+-------+
```

[Try it yourself](https://baked.brrl.net/#recipe=Parse_UNIX_file_permissions\(\)&input=LXJ3LXItLXItLQo)

### Working with IT subnets

This function makes my life easier. It shows me the general network information and the range of a IP addresses for a subnet.

Input:

`10.121.10.8/28`

Output:

```
Network: 10.121.10.8
CIDR: 28
Mask: 255.255.255.240
Range: 10.121.10.0 - 10.121.10.15
Total addresses in range: 16

10.121.10.0
10.121.10.1
10.121.10.2
10.121.10.3
10.121.10.4
[...]
```

[Try it yourself](https://baked.brrl.net/#recipe=Parse_IP_range\(true,true,false\)&input=MTAuMTIxLjEwLjgvMjg)

### Converting blog titles to an URL-friendly format

I've created a small 'Recipe' to format my titles to URL/ text file friendly formats.

Input:

`My use cases for CyberChef`

Output:

`my-use-cases-for-cyberchef`

[Try it yourself](https://baked.brrl.net/#recipe=Find_/_Replace\(%7B'option':'Regex','string':'-'%7D,'',true,false,true,false\)Find_/_Replace\(%7B'option':'Regex','string':'%20%20'%7D,'%20',true,false,true,false\)Find_/_Replace\(%7B'option':'Regex','string':'%5C%5C.'%7D,'',true,false,true,false\)Find_/_Replace\(%7B'option':'Regex','string':'%20'%7D,'-',true,false,true,false\)To_Lower_case\(\)&input=TXkgdXNlIGNhc2VzIGZvciBDeWJlckNoZWY)

### Finding the difference in text

I only use this function for small configuration files or texts. For larger ones, I prefer vimdiff or Notepad++.

[Try it yourself](https://baked.brrl.net/#recipe=Diff\('%5C%5Cn%5C%5Cn','Character',true,true,false,true\)&input=SSBzd2VhciwgdGhlcmUgaXMgbm90aGluZyBtaXNzaW5nLgoKSSBzd2VhciwgdGhlcmUgaXMgbWlzc2luZy4)

### Changing chars to upper/lower case

I rarely use this function, but it has its use cases. Some passwords contain many characters, that can be difficult to differentiate, like `l`, `I`, `1`, `O`,`0`, and so on. I tend to use this feature if I only have 1 more try left, just to make sure.

And I know that copy+paste exists, but that isn't always an option.

[Try it yourself](https://baked.brrl.net/#recipe=To_Upper_case\('All'\)&input=VEhsU18xU19hX1A0UzV3b3JE)

### Adding or remove line numbers

This is self-explanatory. I do not need this feature that often, but comes in handy from time to time.

### Hashing things

If you need a hash of a string or file, CyberChef offers many algorithms. SHA, MD, bcrypt, and so on.

[Try it yourself](https://baked.brrl.net/#recipe=SHA2\('512',64,160\)&input=VEhsU18xU19hX1A0UzV3b3JE)

### Generating QR codes

I use it monthly to generate the QR code for our guest WLAN. Add `WIFI:S:MySSID;T:WPA;P:TH1S_P455W0RD;;` into the input field and it generates the QR code for you. I regularly use it for URLs too.

[Try it yourself](https://baked.brrl.net/#recipe=Generate_QR_Code\('PNG',8,2,'Medium'\)&input=V0lGSTpTOk15U1NJRDtUOldQQTtQOlRIMVNfUDQ1NVcwUkQ7Ow)

### Generating dummy texts / Lorem Ipsum

Really helpful to generate dummy text for all kinds of mock-ups.

[Try it yourself](https://baked.brrl.net/#recipe=Generate_Lorem_Ipsum\(3,'Paragraphs'\))

### Various utilities

I won't go into too much detail since it is fairly self-explanatory. Sorting lines, convert masses or distances, remove white spaces, Find/Replace, find unique strings, converting hexdumps, converting date/time formats, and so many more.

## Conclusion

CyberChef has become a great tool with many use cases. It is more the quick and dirty solution, but this is often all I need. 

The source code can be found [here](https://github.com/gchq/CyberChef).

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