cryptography-algorithms/row-column-based-algorithm.js at main · Ishkhanants/cryptography-algorithms · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
let Coder = function(SourceData, size){
    this.SourceData = SourceData;
    this.size = size;

    this.Encoder = function(){
        let arr = SourceData.split('');
        let l = 0;
        let map = [];

        let rowsize = size;
        if(arr.length > Math.pow(size,2)){
            rowsize = size + Math.floor((arr.length - Math.pow(size,2))/size);
        } else if(arr.length < Math.pow(size,2)){
            rowsize = size - Math.floor((Math.pow(size,2) - arr.length)/size);
        }

        for(let i=0; i<rowsize; i++){
            map[i] = [];
            for(let j=0; j<size; j++){
                map[i][j] = arr[l];
                l++;
                if(arr[l] == undefined){
                    arr[l] = " ";
                }
            }
        }

        l = 0;

        for(let j=0; j<size; j++){
            for(let i=0; i<rowsize; i++){
                arr[l] = map[i][j];
                l++;
            }
        }

        return arr.join("");
    }

    this.Decoder = function(){
        let arr = this.Encoder().split('');
        let l = 0;
        let map = [];

        let rowsize = size;
        if(arr.length > Math.pow(size,2)){
            rowsize = size + Math.floor((arr.length - Math.pow(size,2))/size);
        } else if(arr.length < Math.pow(size,2)){
            rowsize = size - Math.floor((Math.pow(size,2) - arr.length)/size);
        }

        for(let i=0; i<rowsize; i++){
            map[i] = [];
            for(let j=0; j<size; j++){
                map[i][j] = arr[l];
                l++;
            }
        }

        l = 0;

        for(let j=0; j<size; j++){
            for(let i=0; i<rowsize; i++){
                arr[l] = map[i][j];
                l++;
            }
        }

        return arr.join("");
    }

}

let hh = new Coder("Hajastani Hanrapetutjun", 5);

console.log(hh.Encoder());
console.log(hh.Decoder());