Re: [Boost-users] Base16, 32, 64 Encoding / Decoding

Subject: Re: [Boost-users] Base16, 32, 64 Encoding / Decoding
From: Graham Bull (calzakk_at_[hidden])
Date: 2008-12-19 09:28:28

Hi Jeff,

You need to use the Base??EncodeGetLength() functions first, allocate a
buffer of the required size, then use the Base??Encode() function:

const char* source = "...";
unsigned long sourceSize = strlen( source );
unsigned long size = Base32EncodeGetLength( sourceSize );
char* dest = new char[ size+1 ]; //+1 for null terminator
Base32Encode( dest, source, sourceSize );

Regards,

Graham

2008/12/18 Jeff Dunlap <jeff_j_dunlap_at_[hidden]>

> I had really hoped to find something in boost but didn't.  I looked on the
> web and found various routines to encode data and came across a pretty
> complete library that encodes and decodes base16, base32, base64.  Most are
> for either base16 or base32 but CyoEncode by Cyotec covers the three of
> them
> and the source code is available online.
>
> The function parameters seem very unfamiliar to me, for example:
>
> unsigned long Base32Encode( void* dest, const void* src, unsigned long
> size );
> unsigned long Base32Decode( void* dest, const void* src, unsigned long
> size );
>
> There are no samples online so I don't know how to use it.  Since I don't
> understand those function params above, I just came up with the code below
> (seems to encode and decode base64 correctly but not for base32, base16:
>
> // encode
> char * buf1;
> buf1 = new char [100];
> const std::string s = "1010";
> CyoEncode::Base16Encode(buf1, s.c_str(), s.length()); //
> CyoEncode::Base16EncodeGetLength(s.length()));
> std::cout << "[" << buf1 << "]" << std::endl;
>
> // decode
> char * buf2;
> buf2 = new char [100];
> const std::string s2(buf1);
> CyoDecode::Base16Decode(buf2, s2.c_str(), s2.length());
> std::cout << "[" << buf2 << "]" << std::endl;
>
> Can someone review the Base32Encode params and let me know how this is
> really supposed to be used?
>
> Thank you very much,
>
> Jeff
>
>
>
>
> --
>
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