如何从base64编码的字符串构造java.security.PublicKey对象? [英] How can I construct a java.security.PublicKey object from a base64 encoded string?
问题描述
我有来自外部源(Android Store)的bse64encoded字符串公钥,我需要使用它来验证签名内容。如何将字符串转换为java.security.PublicKey接口的实例。如果这有所作为,我在Java 6上。
I have a bse64encoded string Public key from external source (Android Store) and I need to use it to verify signed content. How can I convert the string into an instance of the java.security.PublicKey interface. I am on Java 6 if that makes a difference.
关键是(可能)使用标准java lib而不是bouncy castle(它来自远程团队,所以我不确定)生成。他们的示例代码说使用Security.generatePublicKey(base64EncodedPublicKey);但是标准java中的Security对象没有这样的方法。
The key is (probably) generated using standard java lib and not bouncy castle (its from a remote team so I am not sure). Their sample code says to use Security.generatePublicKey(base64EncodedPublicKey); but the Security object in standard java has no such method.
推荐答案
好的笑话......试试这个
Ok for grins ... try this
- base64解码密钥数据以获取字节数组(byte [])
- 使用字节数组创建新的X509EncodedKeySpec
- 使用KeyFactory.getInstance(RSA)获取KeyFactory实例,假设此处为RSA
- 使用X509EncodedKeySpec
- 结果调用方法generatePublic(KeySpec) /应该/是您使用的公钥。
- base64 decode the key data to get a byte array (byte[])
- Create a new X509EncodedKeySpec using the byte array
- Get an instance of KeyFactory using KeyFactory.getInstance("RSA") assuming RSA here
- call the method generatePublic(KeySpec) with the X509EncodedKeySpec
- Result /should/ be a public key for your usage.
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