How can I convert this XOR-encryption function from Delphi to C#? -

the following delphi routine long-ago compuserve posting, , used encrypt various information in our database. below both delphi 2007 , (thanks unicode differences) delphi xe versions.

we have been trying convert c#, , have gotten close-ish, we're missing somewhere. unfortunately, our delphi guy (me) doesn't know c#, , c# guy new delphi. c# doesn't (appear to) have concept of ansistring, solution involve byte or char arrays?

we'd appreciate in converting c#.

delphi 2007 version (ascii)

function encodedecode(str: string): string; const   hash: string = '^%12hdvjed1~~#29afdmsd`6zvuy@hbkdbc3fn7y7euf|r7934093*7a-|-  q`'; var   i: integer; begin   := 1 length (str)     str[i] := chr (ord (str[i]) xor not (ord (hash[i mod length (hash) + 1])));   result := str; end; 

delphi xe version (unicode)

function tfrmmain.encodedecode(str: ansistring): ansistring; const   hash: string = '^%12hdvjed1~~#29afdmsd`6zvuy@hbkdbc3fn7y7euf|r7934093*7a-|-  q`'; var   i: integer; begin   result := str;   := 1 length (result)     result[i] := ansichar (ord (result[i]) xor not (ord (hash[i mod length (hash) + 1]))); end; 

i don't know c# either, non-idiomatic.

static string encodedecode(string str) {     byte[] hash = new byte[63] { 94, 37, 49, 50, 104, 68, 86, 106, 69, 68, 49, 126,          126, 35, 50, 57, 97, 102, 100, 109, 83, 68, 96, 54, 90, 118, 85, 89, 64,          104, 98, 107, 68, 66, 67, 51, 102, 110, 55, 89, 55, 101, 117, 70, 124, 82,          55, 57, 51, 52, 48, 57, 51, 42, 55, 97, 45, 124, 45, 32, 32, 81, 96 };      encoding ansi = encoding.getencoding(1252);     byte[] input = ansi.getbytes(str);     byte[] output = new byte[input.length];     (int = 0; < input.length; i++)         output[i] = (byte)(input[i] ^ ~hash[(i + 1) % hash.length]);     return ansi.getstring(output); } 

i have assumed ansi strings encoded windows 1252, happen have encoded legacy data different code page obvious enough how change it.

since c# doesn't have equivalent of delphi's 8 bit string types, sorely tempted use byte[] rather string.

done way looks this:

static byte[] encodedecode(byte[] input) {     byte[] hash = new byte[63] { 94, 37, 49, 50, 104, 68, 86, 106, 69, 68, 49, 126,          126, 35, 50, 57, 97, 102, 100, 109, 83, 68, 96, 54, 90, 118, 85, 89, 64,          104, 98, 107, 68, 66, 67, 51, 102, 110, 55, 89, 55, 101, 117, 70, 124, 82,          55, 57, 51, 52, 48, 57, 51, 42, 55, 97, 45, 124, 45, 32, 32, 81, 96 };      byte[] output = new byte[input.length];     (int = 0; < input.length; i++)         output[i] = (byte)(input[i] ^ ~hash[(i + 1) % hash.length]);     return output; } 

@groo makes excellent point hash can initialised more cleanly list this:

byte[] hash = ansi.getbytes(@"^%12hdvjed1~~#29afdmsd`6zvuy@hbkdbc3fn7y7euf|r7934093*7a-|-  q`");