AES加密支持使用192、256位密匙

Unlimited Strength Java(TM) Cryptography Extension Policy Files for the Java(TM) Platform, Standard Edition Development Kit, v6 README ---------------------------------------------------------------------- CONTENTS ---------------------------------------------------------------------- o Introduction o Copyright o Understanding The Export/Import Issues o Where To Find Documentation o Installation o Questions, Support, Reporting Bugs, and Feedback ---------------------------------------------------------------------- Introduction ---------------------------------------------------------------------- Thank you for downloading the Unlimited Strength Java(TM) Cryptography Extension (JCE) Policy Files for the Java(TM) Platform, Standard Edition Development Kit, v6. Due to import control restrictions, the version of JCE policy files that are bundled in the JDK(TM) 6 environment allow "strong" but limited cryptography to be used. This download bundle (the one including this README file) provides "unlimited strength" policy files which contain no restrictions on cryptographic strengths. Please note that this download file does NOT contain any encryption functionality since such functionality is supported in Sun's JDK 6. Thus, this installation applies only to Sun's JDK 6, and assumes that the JDK 6 is already installed. ---------------------------------------------------------------------- Copyright ---------------------------------------------------------------------- The copyright notice governing this product's use can be found in COPYRIGHT.html. This file is normally found in the same directory as this README.txt file. ---------------------------------------------------------------------- Understanding The Export/Import Issues ---------------------------------------------------------------------- JCE for JDK 6 has been through the U.S. export review process. The JCE framework, along with the SunJCE provider that comes standard with it, is exportable. The JCE architecture allows flexible cryptographic strength to be configured via jurisdiction policy files. Due to the import restrictions of some countries, the jurisdiction policy files distributed with the JDK 6 software have built-in restrictions on available cryptographic strength. The jurisdiction policy files in this download bundle (the bundle including this README file) contain no restrictions on cryptographic strengths. This is appropriate for most countries. Framework vendors can create download bundles that include jurisdiction policy files that specify cryptographic restrictions appropriate for countries whose governments mandate restrictions. Users in those countries can download an appropriate bundle, and the JCE framework will enforce the specified restrictions. You are advised to consult your export/import control counsel or attorney to determine the exact requirements. ---------------------------------------------------------------------- Where To Find Documentation ---------------------------------------------------------------------- The following documents will be of interest to you: o The Java(TM) Cryptography Architecture (JCA) Reference Guide at: http://java.sun.com/javase/6/docs/technotes/guides/security/crypto/CryptoSpec.html o The Java Security web site has more information about JCE, plus additional information about the Java Security Model. Please see: http://java.sun.com/products/jce/ http://java.sun.com/security/ ---------------------------------------------------------------------- Installation ---------------------------------------------------------------------- Notes: o Unix (Solaris/Linux) and Win32 use different pathname separators, so please use the appropriate one ("\", "/") for your environment. o <java-home> refers to the directory where the Java SE Runtime Environment (JRE) was installed. It is determined based on whether you are running JCE on a JRE with or without the JDK installed. The JDK contains the JRE, but at a different level in the file hierarchy. For example, if the JDK is installed in /home/user1/jdk1.6.0 on Unix or in C:\jdk1.6.0 on Win32, then <java-home> is /home/user1/jdk1.6.0/jre [Unix] C:\jdk1.6.0\jre [Win32] If on the other hand the JRE is installed in /home/user1/jre1.6.0 on Unix or in C:\jre1.6.0 on Win32, and the JDK is not installed, then <java-home> is /home/user1/jre1.6.0 [Unix] C:\jre1.6.0 [Win32] o On Win32, for each JDK installation, there may be an additional JRE installed under the "Program Files" directory. Please make sure that you install the unlimited strength policy JAR files for all JREs that you plan to use. Here are the installation instruction: 1) Download the unlimited strength JCE policy files. 2) Uncompress and extract the downloaded file. This will create a subdirectory called jce. This directory contains the following files: README.txt This file COPYRIGHT.html Copyright information local_policy.jar Unlimited strength local policy file US_export_policy.jar Unlimited strength US export policy file 3) Install the unlimited strength policy JAR files. To utilize the encryption/decryption functionalities of the JCE framework without any limitation, first make a copy of the original JCE policy files (US_export_policy.jar and local_policy.jar in the standard place for JCE jurisdiction policy JAR files) in case you later decide to revert to these "strong" versions. Then replace the strong policy files with the unlimited strength versions extracted in the previous step. The standard place for JCE jurisdiction policy JAR files is: <java-home>/lib/security [Unix] <java-home>\lib\security [Win32] ----------------------------------------------------------------------- Questions, Support, Reporting Bugs, and Feedback ----------------------------------------------------------------------- Questions --------- For miscellaneous questions about JCE usage and deployment, we encourage you to read: o Information on the JCE web site http://java.sun.com/products/jce o The Java Security Q&A Archives http://archives.java.sun.com/archives/java-security.html o The Java Developer Connection(SM) forums. These discussion forums allow you to tap into the experience of other users, ask questions, or offer tips to others on a variety of Java-related topics including JCE. There is no fee to participate. http://forum.java.sun.com/ Support ------- For more extensive JCE questions or deployment issues, please contact our Technical Support staff at: http://developers.sun.com/prodtech/support/ Please be aware that we may be barred from offering technical support specifically regarding encryption implementations of the JCE APIs to people outside the U.S. or Canada, according to U.S. regulations. Reporting Bugs -------------- To report bugs with sample code or request a feature, please see: http://java.sun.com/cgi-bin/bugreport.cgi Bug reports with test cases are highly appreciated! Feedback -------- Please e-mail general comments about JCE to: java-security@sun.com The above mailing list is not a subscription list or a support mechanism. It is simply a one-way channel that you can use to send comments to the Java Standard Edition security team. Please include the keyword "JAVASEC" in the Subject of your email so it can be distinguished from spam. Though we value your input, before sending your feedback please review our pages of Frequently Asked Questions, available from the JCE web site: http://j