问题描述
我有一个系统,需要在javascript中生成RSA密钥对,然后将公钥存储在服务器端的数据库中(作为字符串),然后Java中的服务器端将加密一个字符串存储的公钥并将其发送到客户端,客户端将使用私钥解密字符串。
I have a system that requires a RSA keypair to be generated in javascript, have the public key then stored in a database at the server side (as a string), then the server side which is in Java will encrypt a string with the stored public key and send it to the client side which will decrypt the string with the private key.
我在客户端使用了一个browsified版本的node-rsa浏览器。
I'm using a browsified version of node-rsa on my client browser.
首先在客户端我生成一个密钥对并导出密钥,将它们存储为字符串
First at the client i generate a keypair and export the keys, storing them as strings
var NodeRSA = require('node-rsa');
var key = new NodeRSA({b: 1024});
key.exportKey("pkcs8-private");
key.exportKey("pkcs8-public-pem");
导出的私钥存储在客户端,公共服务器存储在服务器
The exported private key is stored at the client and the public at the server
接下来我使用java来加密收到公钥的字符串,所以我将pkcs8公钥解析为Java PublicKey对象。
Next i used java to encrypt a string with the public key received, so i parse the pkcs8 public key into a Java PublicKey object.
String pubKey = "<Retrieved pkcs8 public key>";
pubKey = pubKey.replaceAll("(-+BEGIN PUBLIC KEY-+\\r?\\n|-+END PUBLIC KEY-+\\r?\\n?)", "");
byte[] keyBytes = Base64.decodeBase64(pubKey);
X509EncodedKeySpec spec = new X509EncodedKeySpec(keyBytes);
KeyFactory kf = KeyFactory.getInstance("RSA");
PublicKey pk = kf.generatePublic(spec);
用它加密文本
byte[] cipherText;
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, pk);
cipherText = cipher.doFinal("Hello World!".getBytes());
return Base64.encodeBase64String(cipherText);
哪个很好用,并返回一个像这样的Base64编码加密字符串
Which works nicely and returns me a Base64 encoded encrypted string like this
WTS1J2f4w5icsUOCtulyHDaBmB5lN7D8mnj0QWMDBkUGiPHkM8nHVx9pd0MtbQAQNasQS2X8kisLMYyEMPasFZtDH0zX1e8lNYaW0xMKsg++ge87f+95nl+TmxDy6S1m7Ce/n0wXno+0MbSv8YsJtsUcAleyyfQX2bxqX8u7Gjs=
然后我尝试在客户端解密它的字符串
Then i try to decrypt it the string at the client side
首先我重新导入node-rsa中存储的密钥
First i reimport the stored keys in node-rsa
var NodeRSA = require('node-rsa');
var key = new NodeRSA();
key.importKey("<exported private key string>","pkcs8-private");
key.importKey("<exported public key string>","pkcs8-public-pem");
然后我尝试解密Base64编码的加密字符串
Then i try to decrypt the Base64 encoded encrypted string
key.decrypt("<Base64 Encoded Encrypted>", 'utf-8');
这是问题发生的地方,javascript引发此错误
This is where the problem happens, javascript throws this error
有人能指出我在这里做错了吗?
Could anyone point out the mistake that I've made here please?
推荐答案
哦,我找到了解决方案。这是加密方法的一个区别。
Oh i found the solution. It was a difference in the encryption method.
我只需要用
Cipher.getInstance("RSA/ECB/OAEPWithSHA1AndMGF1Padding");
而不是
Cipher.getInstance("RSA");
匹配node-rsa
to match node-rsa
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