Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
140 views
in Technique[技术] by (71.8m points)

How can I construct a java.security.PublicKey object from a base64 encoded string?

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.

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.

question from:https://stackoverflow.com/questions/10900643/how-can-i-construct-a-java-security-publickey-object-from-a-base64-encoded-strin

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

Ok for grins ... try this

  • 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.

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

1.4m articles

1.4m replys

5 comments

57.0k users

...