Java Doc for KeyProtector.java in  » 6.0-JDK-Modules » j2me » sun » security » provider » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Java Source Code / Java Documentation
1. 6.0 JDK Core
2. 6.0 JDK Modules
3. 6.0 JDK Modules com.sun
4. 6.0 JDK Modules com.sun.java
5. 6.0 JDK Modules sun
6. 6.0 JDK Platform
7. Ajax
8. Apache Harmony Java SE
9. Aspect oriented
10. Authentication Authorization
11. Blogger System
12. Build
13. Byte Code
14. Cache
15. Chart
16. Chat
17. Code Analyzer
18. Collaboration
19. Content Management System
20. Database Client
21. Database DBMS
22. Database JDBC Connection Pool
23. Database ORM
24. Development
25. EJB Server geronimo
26. EJB Server GlassFish
27. EJB Server JBoss 4.2.1
28. EJB Server resin 3.1.5
29. ERP CRM Financial
30. ESB
31. Forum
32. GIS
33. Graphic Library
34. Groupware
35. HTML Parser
36. IDE
37. IDE Eclipse
38. IDE Netbeans
39. Installer
40. Internationalization Localization
41. Inversion of Control
42. Issue Tracking
43. J2EE
44. JBoss
45. JMS
46. JMX
47. Library
48. Mail Clients
49. Net
50. Parser
51. PDF
52. Portal
53. Profiler
54. Project Management
55. Report
56. RSS RDF
57. Rule Engine
58. Science
59. Scripting
60. Search Engine
61. Security
62. Sevlet Container
63. Source Control
64. Swing Library
65. Template Engine
66. Test Coverage
67. Testing
68. UML
69. Web Crawler
70. Web Framework
71. Web Mail
72. Web Server
73. Web Services
74. Web Services apache cxf 2.0.1
75. Web Services AXIS2
76. Wiki Engine
77. Workflow Engines
78. XML
79. XML UI
Java
Java Tutorial
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » sun.security.provider 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   sun.security.provider.KeyProtector

KeyProtector
final class KeyProtector (Code)
This is an implementation of a Sun proprietary, exportable algorithm intended for use when protecting (or recovering the cleartext version of) sensitive keys. This algorithm is not intended as a general purpose cipher. This is how the algorithm works for key protection: p - user password s - random salt X - xor key P - to-be-protected key Y - protected key R - what gets stored in the keystore Step 1: Take the user's password, append a random salt (of fixed size) to it, and hash it: d1 = digest(p, s) Store d1 in X. Step 2: Take the user's password, append the digest result from the previous step, and hash it: dn = digest(p, dn-1). Store dn in X (append it to the previously stored digests). Repeat this step until the length of X matches the length of the private key P. Step 3: XOR X and P, and store the result in Y: Y = X XOR P. Step 4: Store s, Y, and digest(p, P) in the result buffer R: R = s + Y + digest(p, P), where "+" denotes concatenation. (NOTE: digest(p, P) is stored in the result buffer, so that when the key is recovered, we can check if the recovered key indeed matches the original key.) R is stored in the keystore. The protected key is recovered as follows: Step1 and Step2 are the same as above, except that the salt is not randomly generated, but taken from the result R of step 4 (the first length(s) bytes). Step 3 (XOR operation) yields the plaintext key. Then concatenate the password with the recovered key, and compare with the last length(digest(p, P)) bytes of R. If they match, the recovered key is indeed the same key as the original key.
author:
   Jan Luehe
version:
   1.23, 10/10/06
See Also:   java.security.KeyStore
See Also:   JavaKeyStore
See Also:   KeyTool
since:
   JDK1.2



Constructor Summary
public  KeyProtector(char[] password)
     Creates an instance of this class, and initializes it with the given password.

Method Summary
protected  voidfinalize()
     Ensures that the password bytes of this key protector are set to zero when there are no more references to it.
public  byte[]protect(Key key)
    
public  Keyrecover(EncryptedPrivateKeyInfo encrInfo)
    


Constructor Detail
KeyProtector
public KeyProtector(char[] password) throws NoSuchAlgorithmException(Code)
Creates an instance of this class, and initializes it with the given password.

The password is expected to be in printable ASCII. Normal rules for good password selection apply: at least seven characters, mixed case, with punctuation encouraged. Phrases or words which are easily guessed, for example by being found in dictionaries, are bad.





Method Detail
finalize
protected void finalize()(Code)
Ensures that the password bytes of this key protector are set to zero when there are no more references to it.



protect
public byte[] protect(Key key) throws KeyStoreException(Code)



recover
public Key recover(EncryptedPrivateKeyInfo encrInfo) throws UnrecoverableKeyException(Code)



Methods inherited from java.lang.Object
public boolean equals(Object obj)(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.