js的RSA和AES加密解密
转自：http://www.oschina.net/code/snippet_552425_46178
代码片段(1)[全屏查看所有代码]
1. [代码]原生的js RSA加密和解密 跳至 [1] [全屏预览]
|
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
|
<
html
>
<
head
>
<
meta
charset
=
'UTF-8'
>
<
body
>
<
div
class
=
'test'
>
<
script
type
=
"text/javascript"
>
function encrypt(data, keyJSON){
var data = new TextEncoder("UTF-8").encode(data);
var randomsKeys = geneRandomHexStr(64); // 128 bit keys
var encryptedKey = hexStringToUint8Array(randomsKeys);
var aesAlgo = {name: 'aes-cbc', iv: hexStringToUint8Array("000102030405060708090a0b0c0d0e0f")};
return crypto.subtle.importKey("jwk", keyJSON, {name: "rsa-oaep", hash: {name: "sha-256"}},true, ['encrypt'])
.then(function(publicKey){
return crypto.subtle.encrypt({name: "rsa-oaep"}, publicKey, encryptedKey);
}).then(function(res){
encryptedKey = bytesToHexString(res)
// use aes to encrypt data
// import aes key
return crypto.subtle.importKey('raw',
hexStringToUint8Array(randomsKeys) , aesAlgo, false, ['encrypt', 'decrypt']);
}).then(function(result){
// use aes to encode
return crypto.subtle.encrypt(aesAlgo,
result, data);
}).then(function(encryptedData){
return Promise.resolve({
'encrypted': bytesToHexString(encryptedData),
'encryptedKey': encryptedKey,
});
});
//console.log(new TextDecoder("UTF-8").decode(data));
// use server public key to encrypt
}
function decrypt(data, keyJSON){
// use local private key to decrypt
var encryptedKey = new hexStringToUint8Array(data.encryptedKey);
var encryptedData = new hexStringToUint8Array(data.encrypted);
var aesAlgo = {name: 'aes-cbc', iv: hexStringToUint8Array("000102030405060708090a0b0c0d0e0f")};
// decrypt key
return crypto.subtle.importKey('jwk', keyJSON, {name: "rsa-oaep", hash: {name: "sha-256"}}, true,
['decrypt']).then(function(privateKey){
return crypto.subtle.decrypt({name: 'rsa-oaep'}, privateKey, encryptedKey);
}).then(function(decryptedKey){
// import aes key
return crypto.subtle.importKey('raw',
decryptedKey, aesAlgo, false, ['encrypt', 'decrypt']);
}).catch(function(){
console.error("decrypt error");
}).then(function(result){
// decode encrypted data
return crypto.subtle.decrypt(aesAlgo, result, encryptedData);
}).then(function(data){
return Promise.resolve(new TextDecoder("UTF-8").decode(new Uint8Array(data)));
})
}
function createNewUserKey(){
var algorithmKeyGen = {
name: "RSA-OAEP",
hash: {name: "sha-256"},
// RsaKeyGenParams
modulusLength: 2048,
publicExponent: new Uint8Array([0x01, 0x00, 0x01]), // Equivalent to 65537
};
var nonExtractable = false;
var publicKey = "";
var privateKey = "";
var keyPairs = "";
return crypto.subtle.generateKey(algorithmKeyGen, true, ['encrypt', 'decrypt']).then(function(result) {
// gene key pair
keyPairs = result;
return Promise.all([crypto.subtle.exportKey("jwk", keyPairs.publicKey),
crypto.subtle.exportKey("jwk", keyPairs.privateKey)]);
})
}
function _arrayBufferToBase64( buffer ) {
var binary = '';
var bytes = new Uint8Array( buffer );
var len = bytes.byteLength;
for (var i = 0; i <
len
; i++) {
binary += String.fromCharCode( bytes[ i ] );
}
return window.btoa( binary );
}
function hexStringToUint8Array(hexString) {
if (hexString.length % 2 != 0)
throw "Invalid hexString";
var
arrayBuffer
=
new
Uint8Array(hexString.length / 2);
for (var
i
=
0
; i < hexString.length; i += 2) {
var
byteValue
=
parseInt
(hexString.substr(i, 2), 16);
if (byteValue == NaN)
throw "Invalid hexString";
arrayBuffer[i/2] = byteValue;
}
return arrayBuffer;
}
function bytesToHexString(bytes) {
if (!bytes)
return null;
bytes
=
new
Uint8Array(bytes);
var hexBytes = [];
for (var
i
=
0
; i < bytes.length; ++i) {
var
byteString
=
bytes
[i].toString(16);
if (byteString.length < 2)
byteString
=
"0"
+ byteString;
hexBytes.push(byteString);
}
return hexBytes.join("");
}
function geneRandomHexStr(length){
var
text
=
""
;
var
possible
=
"0123456789abcdef"
;
for( var
i
=
0
; i < length; i++ )
text += possible.charAt(Math.floor(Math.random() * possible.length));
return text;
}
createNewUserKey().then(function(keyPairs){
encrypt("this is origin text", keyPairs[0]).then(function(res){
console.log('public', JSON.stringify(keyPairs[0]));
console.log('private', JSON.stringify(keyPairs[1]));
decrypt(res, keyPairs[1]).then(function(decrypted){
console.log('decrypted', decrypted);
});
});
})
|