JS/tryRSAcipher.html at master · alTach/JS · 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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
		*{
			margin: 0;
			padding: 0;
		}
		html, body{
			height: 100%;
		}
		.RSA {
			width: 400px;
			height: 100%;
			border: 1px solid black;
			margin: 0 auto;
			padding: 10px;
		}
		p{
			text-align: center;
			margin-bottom: 0;
		}
		h1{
			text-align: center;
		}
		textarea{
			resize: none;
			margin-top: 10px;
			width: 100%;
			font-size: 30px;
		}
		table{
			margin: 10px auto;
		}
		td{
			text-align: right;
		}
		td:nth-child(3n){
			text-align: left;
		}
		td:nth-child(2n){
			padding: 0 5px;
			text-align: center;
		}
		input[type="submit"]{
			width: 100%;
		}
	</style>
			<script type="text/javascript">
				function deleteEl(){
					for(var i=0; i<arguments.length; i++){
						arguments[i].style = "display: none;";
					}
				}
				function getRandom(min, max){
					var temp = Math.random() * (max - min) + min;
					temp = Math.round(temp);
					return temp;
				}
				function powAndMod(a,b,c){
				// 	var temp = a;
				// 	for(var i=0, b=b-1; i<b; i++){
				// 		temp = (temp * a) % c;
				// 		if(temp==0) break;
				// 	}
				// 	return temp;
				}

				function isSimpleNumber(a){
					var temp = Math.round(Math.sqrt(a));
					for (var i = 2; i <= temp; i++)
						if(a%i == 0) return false
					return true
				}

				function mutuallySimple(a, b) {
    				var num;
    				while ( b ) {
        				num = a % b;
        				a = b;
        				b = num;
    				}
    				if (Math.abs(a) == 1) {
        				return true;
    				}
    				return false;
				}

				function simpleWithEyler(eylerFunction) {
					var temp = getRandom(1, eylerFunction);
					while(temp > 1){
						if(mutuallySimple(eylerFunction, temp)) return temp
						temp = getRandom(1, eylerFunction-1);
					}
					return 1;
				}

				function findD(e, eylerFunction){
					var temp = Math.round(eylerFunction/e);
					while(1){
						if(temp*e%eylerFunction == 1 && temp!=e) return temp;
						temp++;
					}
				}

				function makeEncripto(str, e, n){
					var a = [];

					for(i=0; i<str.length; i++){
						a[i] = str[i].charCodeAt();
					}
					console.log(a.join('-'));
					for(i=0; i<a.length; i++){
						a[i] = Math.pow(a[i], e) % n;
					}
					console.log(a.join('-'));
					return a.join('-');
				}

				function makeDecripto(str,d,n){
					for(var i=0; i<str.length; i++){
						str[i] = Math.pow(str[i], d) % n;
					}
					for(var i=0; i<str.length; i++){
						str[i] = String.fromCharCode(str[i]);
					}
					return str.join('-')
				}

				function encription(){
					deleteEl(document.getElementById("dl"), document.getElementById("nl"), document.getElementById("inputDecripto"));

					var p = document.getElementById('p').value;
					var q = document.getElementById('q').value;
					var n = p * q;
					var result = document.getElementById('result');
					var eylerFunction = (p-1)*(q-1);
					var e = simpleWithEyler(eylerFunction);
					var d = findD(e, eylerFunction);
					var str = document.getElementById('textarea').value;
					var encriptionStr = makeEncripto(str, e, n);
					document.getElementById('textarea2').value = encriptionStr;

					result.innerHTML = "\
					<tr>\
						<td>n:</td>\
						<td>  </td>\
						<td>" + n + "</td>\
					</tr>\
					<tr>\
						<td>f(n):</td>\
						<td>  </td>\
						<td>" + eylerFunction + "</td>\
					</tr>\
					<tr>\
						<td>e:</td>\
						<td>[2, " + (eylerFunction - 1) + "]</td>\
						<td>" + e + "</td>\
					</tr>\
					<tr>\
						<td>d:</td>\
						<td>[" + Math.round(eylerFunction/e) +", inf]</td>\
						<td>" + d + "</td>\
					</tr>\
					<tr>\
						<td>Открытый ключ</td>\
						<td></td>\
						<td>Закрытый ключ</td>\
					</tr>\
					<tr>\
						<td>e = " + e + "; n = " + n + "</td>\
						<td>  </td>\
						<td>d = " + d + "; n = " + n + "</td>\
					</tr>\
					"
				}

				function decription(){
					deleteEl(document.getElementById("pl"), document.getElementById("ql"), document.getElementById("inputEncripto"))

					str=document.getElementById('textarea2').value.split('-');
					var d = document.getElementById('d').value;
					var n =document.getElementById('n').value;

					str = makeDecripto(str, d, n);
					console.log(str);
				}

				</script>
</head>
<body>
	<main>
		<div class="RSA">
			<h1>RSA</h1>
			<label for="p" id="pl">
				P =
				<input type="text" id="p">
			</label>
			<label for="q" style="float: right" id="ql">
				<input type="text" id="q">
				= Q
			</label>
			<textarea cols="63" rows="5" id="textarea" placeholder="Введите текст, который хотим защифровать"></textarea>
			<input type="submit" value="защифровать" onclick="encription()" id="inputEncripto">
			<table id="result" cellpadding="50"></table>

			<label for="e" id="dl">
				d =
				<input type="text" id="d">
			</label>
			<label for="n" style="float: right" id="nl">
				<input type="text" id="n">
				= n
			</label>
			<textarea cols="63" rows="5" id="textarea2" placeholder="Введите текст, который хотим расшифровать"></textarea>
			<input type="submit" value="расшифровать" onclick="decription()" id="inputDecripto">
		</div>
	</main>

</body>
</htmlcase '>