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Jun 3rd, 2009

Encrypting Binary

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Is it possible to open a file in binary mode and make an array out of it then to encrypt that information. I guess I should ask how you would start something like that? Thanks

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clutchkiller

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Jun 3rd, 2009

Re: Encrypting Binary

Well your question is not quite clear but you can always use fopen command with :
“rb” Open a binary file for reading
“wb” Create a binary file for writing
“ab” Append to a binary file
“rb+“ Open a binary file for read/write
“wb+“ Create a binary file for read/write
“ab+“ Open a binary file for read/write

as modes to manipulate it.For more info try this.

csurfer

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Jun 4th, 2009

Re: Encrypting Binary

This helps, but to clarify, instead of taking a string of charecters from a text file and throwing them into an array, is it possible to take that same concept but do it with binary? Thanks

clutchkiller

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Jun 4th, 2009

Re: Encrypting Binary

Well if you are using linux then you can always use the meta-characters and the od command to your requirements.Check these out <1> <2>

csurfer

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Jun 4th, 2009

Re: Encrypting Binary

Yes, of course it can be done. Same as text.

WaltP

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Jun 4th, 2009

Re: Encrypting Binary

>This helps, but to clarify, instead of taking a string of charecters from a text file and throwing
>them into an array, is it possible to take that same concept but do it with binary? Thanks

Yes, but don't expect that you would be able to display them. A binary file is a stream of unformatted character. That is, it is raw and does not follow ASCII standards. Hence your terminal won't be able to display it. But it sure can be dumped into a char array.

C++ Syntax (Toggle Plain Text)
fstream f("asdf.dat");
char* arr=new char[ sizeof file];
f.read(reinterpret_cast<char*>(arr), size of file);
fstream f("asdf.dat");
char* arr=new char[ sizeof file];
f.read(reinterpret_cast<char*>(arr), size of file);

Last edited by siddhant3s; Jun 4th, 2009 at 1:01 am.

siddhant3s

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Jun 4th, 2009

Re: Encrypting Binary

C++ Syntax (Toggle Plain Text)
char* arr = new char[...];
f.read(reinterpret_cast<char*>(arr), ...
char* arr = new char[...];
f.read(reinterpret_cast<char*>(arr), ...

Why reinterpret_cast?..

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