Plz help in this code of s-box of whirlpool cryptographic hash function.

Question

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C#

Int16 [,]sbox={{18,23,C6,E8,87,B8,01,4F,36,A6,D2,F5,79,6F,91,52},
                {60,BC,9B,8E,A3,0C,7B,35,1D,E0,D7,C2,2E,4B,FE,57},
                {15,77,37,E5,9F,F0,4A,CA,58,C9,29,0A,B1,A0,6B,85},
                {BD,5D,10,F4,CB,3E,05,67,E4,27,41,8B,A7,7D,95,C8},
                {FB,EE,7C,66,DD,17,47,9E,CA,2D,BF,07,AD,5A,83,33},
                {63,02,AA,71,C8,19,49,C9,F2,E3,5B,88,9A,26,32,B0},
                {E9,0F,D5,80,BE,CD,34,48,FF,7A,90,5F,20,68,1A,AE},
                {B4,54,93,22,64,F1,73,12,40,08,C3,EC,DB,A1,8D,3D},
                {97,00,CF,2B,76,82,D6,1B,B5,AF,6A,50,45,F3,30,EF},
                {3F,55,A2,EA,65,BA,2F,CO,DE,1C,FD,4D,92,75,06,8A},
                {B2,E6,0E,1F,62,D4,A8,96,F9,C5,25,59,84,72,39,4C},
                {5E,78,38,8C,C1,A5,E2,61,B3,21,9C,1E,43,C7,FC,04},
                {51,99,6D,0D,FA,DF,7E,24,3B,AB,CE,11,8F,4E,B7,EB},
                {3C,81,94,F7,B9,13,2C,D3,E7,6E,C4,03,56,44,7F,A9},
                {2A,BB,C1,53,DC,0B,9D,6C,31,74,F6,46,AC,89,14,E1},
                {16,3A,69,09,70,B6,C0,ED,CC,42,98,A4,28,5C,F8,86}};

I want this array elements to be in hexadecimal. There is error in only underlined sections of this code. My ques.is-
How to store hex no.s in an array? and
why there is errors in only four lines?

Posted 4-Feb-12 8:47am

Ratika Agarwal

Updated 4-Feb-12 9:42am

v3

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2 solutions

Solution 3

This notation will work:

Int16[,] sbox1 = new Int16[,]
{
    {0x18,0x23,0xC6,0xE8,0x87,0xB8,0x01,0x4F,0x36,0xA6,0xD2,0xF5,0x79,0x6F,0x91,0x52},
    {0x60,0xBC,0x9B,0x8E,0xA3,0x0C,0x7B,0x35,0x1D,0xE0,0xD7,0xC2,0x2E,0x4B,0xFE,0x57},
    {0x15,0x77,0x37,0xE5,0x9F,0xF0,0x4A,0xCA,0x58,0xC9,0x29,0x0A,0xB1,0xA0,0x6B,0x85}
};

Or this:

Int16[,] sbox2 = new Int16[3, 16]
{
    {0x18,0x23,0xC6,0xE8,0x87,0xB8,0x01,0x4F,0x36,0xA6,0xD2,0xF5,0x79,0x6F,0x91,0x52},
    {0x60,0xBC,0x9B,0x8E,0xA3,0x0C,0x7B,0x35,0x1D,0xE0,0xD7,0xC2,0x2E,0x4B,0xFE,0x57},
    {0x15,0x77,0x37,0xE5,0x9F,0xF0,0x4A,0xCA,0x58,0xC9,0x29,0x0A,0xB1,0xA0,0x6B,0x85}
};

Or this:

C#

Int16[,] sbox3 =
{
    {0x18,0x23,0xC6,0xE8,0x87,0xB8,0x01,0x4F,0x36,0xA6,0xD2,0xF5,0x79,0x6F,0x91,0x52},
    {0x60,0xBC,0x9B,0x8E,0xA3,0x0C,0x7B,0x35,0x1D,0xE0,0xD7,0xC2,0x2E,0x4B,0xFE,0x57},
    {0x15,0x77,0x37,0xE5,0x9F,0xF0,0x4A,0xCA,0x58,0xC9,0x29,0x0A,0xB1,0xA0,0x6B,0x85}
};

So it looks like you must need to add "Ox" in front of every hex value.

Posted 4-Feb-12 12:14pm

BillWoodruff

Updated 4-Feb-12 16:02pm

v2

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Christian Graus · Accepted Answer · 2012-02-04T08:55:00

Solution 1

Wow. The reason you long how SOME errors, is that any number that has no letter in it, is a valid base 10 number. I believe you can use 0x, as 0xBD, to specify a number in hex. If you didn't specify it, how does the compiler tell between 55 and 0x55 ?

Posted 4-Feb-12 8:55am

Christian Graus

Comments

Ratika Agarwal 5-Feb-12 13:07pm

thanks for the idea of 0x.