junwei-wang / cpabe Goto Github PK

Could you please tell me how to set the policy expression？

hi junwei-wang
i have a question
what kind of structure policy??
what kind of structure user's attributes??

Hello, I am trying to use your library to encrypt some csv files.

First I transform the file to a string. Maybe this approach is wrong.

• I am doing MultipartFile file to get the file from a Rest request
• content = new String(file.getBytes());
• then encrypt and store
• retrieve and decrypt,
• return the file by content.getBytes()

The encryption and decryption work fine!!

However, during this process the csv seems to loose the line breaks and all comes as one line

Do you have any suggestions on how to tackle this problem ??

ps I have checked that just by uploading file, encoding to string, then decode it and return as a file maintains all line breaks, so I figure the encoding must play some role

I'm using jpbc library but also it shows this error

java.lang.UnsatisfiedLinkError: Unable to load library 'jpbc-pbc': The specified module could not be found.

at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:164)
at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:237)
at com.sun.jna.Library$Handler.(Library.java:140)
at com.sun.jna.Native.loadLibrary(Native.java:375)
at com.sun.jna.Native.loadLibrary(Native.java:360)
at it.unisa.dia.gas.plaf.jpbc.wrapper.jna.WrapperLibraryProvider.(WrapperLibraryProvider.java:14)
at it.unisa.dia.gas.plaf.jpbc.pbc.PairingFactory.isPBCAvailable(PairingFactory.java:18)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at it.unisa.dia.gas.plaf.jpbc.pairing.PairingFactory.(PairingFactory.java:59)
at it.unisa.dia.gas.plaf.jpbc.pairing.PairingFactory.(PairingFactory.java:21)
at bswabe.Bswabe.setup(Bswabe.java:38)
at cpabe.Cpabe.setup(Cpabe.java:29)
at java_2_cpabe.DemoForCpabe.main(DemoForCpabe.java:421)

Dear Sir
while debugging your code in eclipse, my console shows the following messages, but after the decryption the decrypted file is not created. Could you please let me know the issue.

thank you

below imports cannot be resolved:
Even i have jar file cpabe 2.0.0 and if i use cpabe 1.2.1 i get err.

1. it.unisa.dia.gas.jpbc.CurveParameters and
2. it.unisa.dia.gas.plaf.jpbc.pairing.DefaultCurveParameters

Anyone help me to solve this pbm.

你好，请问有没有Bswabe 类中的setup、keygen、delegate、enc等函数的详细文档，我是这方面的小白，最近在研究属性加密不知道公代码代表什么公式，请赐教！我的邮箱：[email protected]。 谢谢！

is this code work with 64bit computer

//start to setup
java.lang.UnsatisfiedLinkError: Unable to load library 'jpbc-pbc': ???????¨
at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:164)
at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:237)
at com.sun.jna.Library$Handler.(Library.java:140)
at com.sun.jna.Native.loadLibrary(Native.java:375)
at com.sun.jna.Native.loadLibrary(Native.java:360)
at it.unisa.dia.gas.plaf.jpbc.wrapper.jna.WrapperLibraryProvider.(WrapperLibraryProvider.java:14)
at it.unisa.dia.gas.plaf.jpbc.pbc.PairingFactory.isPBCAvailable(PairingFactory.java:18)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at it.unisa.dia.gas.plaf.jpbc.pairing.PairingFactory.(PairingFactory.java:49)
at it.unisa.dia.gas.plaf.jpbc.pairing.PairingFactory.(PairingFactory.java:20)
at bswabe.Bswabe.setup(Bswabe.java:38)
at cpabe.Cpabe.setup(Cpabe.java:30)
at DemoForCpabe.main(DemoForCpabe.java:419)
Exception in thread "main" java.io.FileNotFoundException: file_dir\pub_key (系统找不到指定的路径。)
at java.base/java.io.FileOutputStream.open0(Native Method)
at java.base/java.io.FileOutputStream.open(Unknown Source)
at java.base/java.io.FileOutputStream.(Unknown Source)
at java.base/java.io.FileOutputStream.(Unknown Source)
at cpabe.Common.spitFile(Common.java:25)
at cpabe.Cpabe.setup(Cpabe.java:34)
at DemoForCpabe.main(DemoForCpabe.java:419)
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.jna.Native (file:/F:/PROJECT/CPABE/jpbc/jars/jna-3.2.5.jar) to field java.lang.ClassLoader.nativeLibraries
WARNING: Please consider reporting this to the maintainers of com.sun.jna.Native
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

SHOWS "java.lang.UnsatisfiedLinkError: Unable to load library 'jpbc-pbc': The specified module could not be found" ERROR AFTER RUNNING.

I installed the cpabe(The paper ''Ciphertext-Policy Attribute-Based Encryption " provide) in Linux. I want to use your decode function in Java. I use ther pub_key, private_key and encode.pdf.cpabe generated by the Linux cpabe function. When I use your decode function to decode the encode.pdf.cpabe:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 888
at bswabe.SerializeUtils.unserializeString(SerializeUtils.java:61)
at bswabe.SerializeUtils.unserializeBswabePub(SerializeUtils.java:87)
at cpabe.Cpabe.dec(Cpabe.java:109)
at DemoForCpabe.main(DemoForCpabe.java:434)
Could you please tell me what cause this? I tried, but I couldn't find a solution.

Sir ,
I wanted to know if there is a way to read the encrypted file. Sorry for the inconvenience ,but I am still at the beginner level in coding and i have to submit a project related to this topic.It woulb be very helpful if you provide me some guidance.
Thank you

I am Getting

java.lang.UnsatisfiedLinkError: Unable to load library 'jpbc-pbc': The specified module could not be found.

at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:164)
at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:237)
at com.sun.jna.Library$Handler.<init>(Library.java:140)
at com.sun.jna.Native.loadLibrary(Native.java:375)
at com.sun.jna.Native.loadLibrary(Native.java:360)
at it.unisa.dia.gas.plaf.jpbc.wrapper.jna.WrapperLibraryProvider.<clinit>(WrapperLibraryProvider.java:14)
at it.unisa.dia.gas.plaf.jpbc.pbc.PairingFactory.isPBCAvailable(PairingFactory.java:18)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at it.unisa.dia.gas.plaf.jpbc.pairing.PairingFactory.<init>(PairingFactory.java:49)
at it.unisa.dia.gas.plaf.jpbc.pairing.PairingFactory.<clinit>(PairingFactory.java:20)
at ALGOS.setup(ALGOS.java:43)
at AA.setup(AA.java:25)
at ABE_ALGO.main(ABE_ALGO.java:34)

I have imported all jpbc-pbc jar files ...

The pub_key file、the master_key file and the prv_key file are not found .Could you tell me how to generate it or provide a test file?