#Vim (Cracked by Bruce Forte)

This is a patched version of my previous approach

:for i in split('Qq@:=+!','\zs')
exe 'map '.i.' <nop>'
exe 'map! '.i.' <nop>'
endfo

Plus 3 bytes for the -Z flag.

You can Try it online!, but keep in mind that some things are slightly different online, since this is a V interpreter, not a vim interpreter. Most notably, the -Z flag in vim is translated to the --safe flag in V. Of course, your crack may not rely on any V-specific features.

Input is to the buffer like this:

3
4

And output is to the buffer.

What's evil about it?

First off, the -Z flag prevents you from running any external commands (such as bash, python, awk, etc.). Any cracks must run in pure vim. Also, to clarify, an answer like :q<cr>read a;read b; echo $((a+b)) is not valid, because that is no longer a vim answer. The input and output must happen inside of one vim session

Then it makes it so that the following characters cannot be used:

Qq@:=+!

• Disabling Q and : prevents you from running ex commands.

• Disabling q prevents a workaround for q: entering ex mode, and removes your ability to create/run macros.

• Disabling @ prevents you from deleting text, and running that as a macro (the shortest way to add two numbers).

• Disabling ! prevents you from using filters.

• And lastly, disabling = and + makes it so you can't use the evaluation register.

For reference, my solution is 23 keystrokes long. Have fun cracking!

Vim (Cracked by Bruce Forte)

This is a patched version of my previous approach

:for i in split('Qq@:=+!','\zs')
exe 'map '.i.' <nop>'
exe 'map! '.i.' <nop>'
endfo

Plus 3 bytes for the -Z flag.

You can Try it online!, but keep in mind that some things are slightly different online, since this is a V interpreter, not a vim interpreter. Most notably, the -Z flag in vim is translated to the --safe flag in V. Of course, your crack may not rely on any V-specific features.

Input is to the buffer like this:

3
4

And output is to the buffer.

What's evil about it?

First off, the -Z flag prevents you from running any external commands (such as bash, python, awk, etc.). Any cracks must run in pure vim. Also, to clarify, an answer like :q<cr>read a;read b; echo $((a+b)) is not valid, because that is no longer a vim answer. The input and output must happen inside of one vim session

Then it makes it so that the following characters cannot be used:

Qq@:=+!

• Disabling Q and : prevents you from running ex commands.

• Disabling q prevents a workaround for q: entering ex mode, and removes your ability to create/run macros.

• Disabling @ prevents you from deleting text, and running that as a macro (the shortest way to add two numbers).

• Disabling ! prevents you from using filters.

• And lastly, disabling = and + makes it so you can't use the evaluation register.

For reference, my solution is 23 keystrokes long. Have fun cracking!

#Vim

This is a patched version of my previous approach

:for i in split('Qq@:=+!','\zs')
exe 'map '.i.' <nop>'
exe 'map! '.i.' <nop>'
endfo

Plus 3 bytes for the -Z flag.

You can Try it online!, but keep in mind that some things are slightly different online, since this is a V interpreter, not a vim interpreter. Most notably, the -Z flag in vim is translated to the --safe flag in V. Of course, your crack may not rely on any V-specific features.

Input is to the buffer like this:

3
4

And output is to the buffer.

What's evil about it?

First off, the -Z flag prevents you from running any external commands (such as bash, python, awk, etc.). Any cracks must run in pure vim. Also, to clarify, an answer like :q<cr>read a;read b; echo $((a+b)) is not valid, because that is no longer a vim answer. The input and output must happen inside of one vim session

Then it makes it so that the following characters cannot be used:

Qq@:=+!

• Disabling Q and : prevents you from running ex commands.

• Disabling q prevents a workaround for q: entering ex mode, and removes your ability to create/run macros.

• Disabling @ prevents you from deleting text, and running that as a macro (the shortest way to add two numbers).

• Disabling ! prevents you from using filters.

• And lastly, disabling = and + makes it so you can't use the evaluation register.

For reference, my solution is 23 keystrokes long. Have fun cracking!

#Vim (Cracked by Bruce Forte)

This is a patched version of my previous approach

:for i in split('Qq@:=+!','\zs')
exe 'map '.i.' <nop>'
exe 'map! '.i.' <nop>'
endfo

Plus 3 bytes for the -Z flag.

You can Try it online!, but keep in mind that some things are slightly different online, since this is a V interpreter, not a vim interpreter. Most notably, the -Z flag in vim is translated to the --safe flag in V. Of course, your crack may not rely on any V-specific features.

Input is to the buffer like this:

3
4

And output is to the buffer.

What's evil about it?

First off, the -Z flag prevents you from running any external commands (such as bash, python, awk, etc.). Any cracks must run in pure vim. Also, to clarify, an answer like :q<cr>read a;read b; echo $((a+b)) is not valid, because that is no longer a vim answer. The input and output must happen inside of one vim session

Then it makes it so that the following characters cannot be used:

Qq@:=+!

• Disabling Q and : prevents you from running ex commands.

• Disabling q prevents a workaround for q: entering ex mode, and removes your ability to create/run macros.

• Disabling @ prevents you from deleting text, and running that as a macro (the shortest way to add two numbers).

• Disabling ! prevents you from using filters.

• And lastly, disabling = and + makes it so you can't use the evaluation register.

For reference, my solution is 23 keystrokes long. Have fun cracking!