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| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script>
<style>
#root {
width: 60%;
margin: auto;
}
.header {
width: 360px;
margin: auto;
}
.main {
display: flex;
justify-content: left;
padding-top: 20px;
}
.area {
width: 40%;
padding-right: 80px;
}
.area textarea {
width: 100%;
height: 120px;
}
</style>
</head>
<body>
<div id="root">
<div class="header">
<input type="text" placeholder="请输入密钥" v-model.lazy.trim="key" @blur="setKey">
<button @click="encryption">加密</button>
<button @click="decrypt">解密</button>
</div>
<div class="main">
<div class="area">
<textarea placeholder="请输入明文/密文" v-model.lazy.trim="put"></textarea>
</div>
<div class="area">
<textarea placeholder="加密/解密的结果" v-model.lazy.trim="out"></textarea>
</div>
</div>
</div>
<script>
Vue.config.productionTip = false;
new Vue({
el: "#root",
data: {
key: '',
put: '',
out: '',
},
computed: {
table() {
const obj = {}
let c1 = '', c2 = '', r = ''
for (let i = 97; i < 123; i++) {
c1 = String.fromCharCode(i)
obj[c1] = {}
for (let n = 97; n < 123; n++) {
let res = n + i - 97
c2 = String.fromCharCode(n)
r = String.fromCharCode(res > 122 ? res - 26 : res)
obj[c1][c2] = r
}
}
return obj
}
},
methods: {
setKey() {
if (!/^[a-z|A-Z]+$/.test(this.key)) {
this.key = ''
}
},
encryption() {
let {put, key} = this
key = key.toLowerCase()
let out = []
let n = 0
const l = key.length - 1
if (put && key) {
for (let i = 0; i < put.length; i++) {
if (/[a-z]/.test(put[i])) {
out.push(this.table[key[n]][put[i]])
} else if (/[A-Z]/.test(put[i])) {
let char = this.table[key[n]][put[i].toLowerCase()]
out.push(char.toUpperCase())
} else {
out.push(put[i])
}
n === l ? n = 0 : n++
}
this.out = out.join('')
}
},
decrypt() {
let {put, key} = this
key = key.toLowerCase()
let out = []
let n = 0
const l = key.length - 1
if (put && key) {
for (let i = 0; i < put.length; i++) {
if (/[a-z]/.test(put[i])) {
out.push(this.decryptUtil(key[n], put[i]))
} else if (/[A-Z]/.test(put[i])) {
let char = this.decryptUtil(key[n], put[i].toLowerCase())
out.push(char.toUpperCase())
} else {
out.push(put[i])
}
n === l ? n = 0 : n++
}
this.out = out.join('')
}
},
decryptUtil(key, value) {
for (let i = 97; i < 123; i++) {
if (this.table[key][String.fromCharCode(i)] === value) {
return String.fromCharCode(i)
}
}
}
}
});
</script>
</body>
</html>
|
