java code and document security

java code and document security

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  ADVANCE JAVA
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  ADVANCE JAVA Classified e-Material2 Code and Document Security Code Document
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  ADVANCE JAVA Author Profile Ankit Desai  Ph.D. Scholar, IET, Ahmedabad University  Education: M. Tech. (C.E.), B. E. (I. T.)  Experience: 8 years (Academic and Research)  Research Interest: IoT, Big Data Analytics, Machine Learning, Data Mining, Algorithms. Classified e-Material 3
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  ADVANCE JAVA Classified e-Material4 DIGITAL SIGNATURE  Sign document using private key keytool  Generate digital signature jarsigner  Send document with your public key  Receiver use the public key to verify that your document
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  ADVANCE JAVA Classified e-Material5 CERTIFICATE  A public key.  The "distinguished-name" information for entity  A digital signature.  The distinguished-name information for the signer (issuer).
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  ADVANCE JAVA Classified e-Material6 SIGNING CODE AND GRANTING ITS PERMISSION Count.java javac Count.class jar jarsigner Count.jar Keytool - genkey susanstore Priveate key Public key certificate Keytool -export Susanjones.cer sCount.jar 1 2 3 4 5
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  ADVANCE JAVA Classified e-Material7 GENERATE KEYS  Use keytool keytool -genkey -alias signFiles -keypass kpi135 -keystore susanstore -storepass ab987c
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  ADVANCE JAVA Classified e-Material8 SIGN THE JAR FILES  jarsigner -keystore susanstore -signedjar sCount.jar Count.jar signFiles
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  ADVANCE JAVA Classified e-Material9 EXPORT THE PUBLIC KEY CERTIFICATE  keytool -export -keystore susanstore -alias signFiles -file SusanJones.cer
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  ADVANCE JAVA Classified e-Material10 STEPS FOR THE CODE RECIVER sCount.jar from Susan java 1 Security manager Data file Exception: Count program doesn’t have Permission to read the data file Susan.cer from Susan 2 Keytool -import raystore Alias susan Susan’s public key certificate Java Policy tool Policy file ray policy Granting code signed By “susan” permission to Read the data file sCount.jar from susan Security manager Data file 3 4
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  ADVANCE JAVA Classified e-Material11 OBSERV THE RESTRICTED APPLICATION java -cp sCount.jar Count C:TestDatadata Exception in thread "main" java.security.AccessControlException: access denied (java.io.FilePermission C:TestDatadata read) at java.security.AccessControlContext.checkPermission(Compiled Code) at java.security.AccessController.checkPermission(Compiled Code) at java.lang.SecurityManager.checkPermission(Compiled Code) at java.lang.SecurityManager.checkRead(Compiled Code) at java.io.FileInputStream.(Compiled Code) at Count.main(Compiled Code)
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  ADVANCE JAVA Classified e-Material12 IMPORT THE CERTIFICATE AS A TRUSTED CERTIFICATE keytool -import -alias susan -file SusanJones.cer - keystore raystore
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  ADVANCE JAVA Classified e-Material13 SET UP A POLICY FILE TO GRANT THE REQUIRED PERMISSION  Start Policy Tool  Specify the Keystore  Add a Policy Entry with a SignedBy Alias  Save the Policy File