Opentimestamps - Java NullPointerException when trying to deserialize OTS file

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When I try to verify a timestamp using the Java library, I am running into a Java NullPointerException.

I'm following the examples in the README of https://github.com/opentimestamps/java-opentimestamps

This is my code:

byte originalFile = Files.readAllBytes(fileData.get("absoluteFilePath"));     

byte originalBytes = new String(originalFile).getBytes("UTF-8");

String originalHex = DatatypeConverter.printHexBinary(originalBytes);



byte otsFile = Files.readAllBytes(fileData.get("otsFilePath"));

byte otsBytes = new String(otsFile).getBytes("UTF-8");

String otsHex = DatatypeConverter.printHexBinary(otsBytes);



// below is from the examples...



DetachedTimestampFile detached = DetachedTimestampFile.from( new OpSHA256(), originalFile );

DetachedTimestampFile detachedOts = DetachedTimestampFile.deserialize(ots);



HashMap<Chains, VerifyResult> result = OpenTimestamps.verify(detachedOts,detached);

And this the exception:

java.lang.NullPointerException: null

    at com.eternitywall.ots.Timestamp.doTagOrAttestation(Timestamp.java:101) ~[java-opentimestamps-1.16.jar:na]

    at com.eternitywall.ots.Timestamp.deserialize(Timestamp.java:89) ~[java-opentimestamps-1.16.jar:na]

    at com.eternitywall.ots.DetachedTimestampFile.deserialize(DetachedTimestampFile.java:107) ~[java-opentimestamps-1.16.jar:na]

    at com.eternitywall.ots.DetachedTimestampFile.deserialize(DetachedTimestampFile.java:120) ~[java-opentimestamps-1.16.jar:na]

    at com.fmr.ots.FileTimestampController.verifyDocument(FileTimestampController.java:110) ~[classes/:na]

Does anyone know how to correctly read the original file and ots file in order to correctly verify the file?

asked Nov 15 at 11:03

simbro

507626

Possible duplicate of What is a NullPointerException, and how do I fix it?
– Progman
Nov 15 at 13:22

Thanks Progman - though I don't see how it relates to my problem - the parameters I'm passing to the Opentimestamps class is not a null pointer.
– simbro
Nov 15 at 15:27

Please edit your question to include a MCVE which can be compiled and tested by others, which will throw the NullPointerException you get.
– Progman
Nov 15 at 15:33

add a comment |

up vote
0
down vote

favorite

When I try to verify a timestamp using the Java library, I am running into a Java NullPointerException.

I'm following the examples in the README of https://github.com/opentimestamps/java-opentimestamps

This is my code:

byte originalFile = Files.readAllBytes(fileData.get("absoluteFilePath"));     

byte originalBytes = new String(originalFile).getBytes("UTF-8");

String originalHex = DatatypeConverter.printHexBinary(originalBytes);



byte otsFile = Files.readAllBytes(fileData.get("otsFilePath"));

byte otsBytes = new String(otsFile).getBytes("UTF-8");

String otsHex = DatatypeConverter.printHexBinary(otsBytes);



// below is from the examples...



DetachedTimestampFile detached = DetachedTimestampFile.from( new OpSHA256(), originalFile );

DetachedTimestampFile detachedOts = DetachedTimestampFile.deserialize(ots);



HashMap<Chains, VerifyResult> result = OpenTimestamps.verify(detachedOts,detached);

And this the exception:

java.lang.NullPointerException: null

    at com.eternitywall.ots.Timestamp.doTagOrAttestation(Timestamp.java:101) ~[java-opentimestamps-1.16.jar:na]

    at com.eternitywall.ots.Timestamp.deserialize(Timestamp.java:89) ~[java-opentimestamps-1.16.jar:na]

    at com.eternitywall.ots.DetachedTimestampFile.deserialize(DetachedTimestampFile.java:107) ~[java-opentimestamps-1.16.jar:na]

    at com.eternitywall.ots.DetachedTimestampFile.deserialize(DetachedTimestampFile.java:120) ~[java-opentimestamps-1.16.jar:na]

    at com.fmr.ots.FileTimestampController.verifyDocument(FileTimestampController.java:110) ~[classes/:na]

Does anyone know how to correctly read the original file and ots file in order to correctly verify the file?

asked Nov 15 at 11:03

simbro

507626

Possible duplicate of What is a NullPointerException, and how do I fix it?
– Progman
Nov 15 at 13:22

Thanks Progman - though I don't see how it relates to my problem - the parameters I'm passing to the Opentimestamps class is not a null pointer.
– simbro
Nov 15 at 15:27

Please edit your question to include a MCVE which can be compiled and tested by others, which will throw the NullPointerException you get.
– Progman
Nov 15 at 15:33

add a comment |

up vote
0
down vote

favorite

When I try to verify a timestamp using the Java library, I am running into a Java NullPointerException.

I'm following the examples in the README of https://github.com/opentimestamps/java-opentimestamps

This is my code:

byte originalFile = Files.readAllBytes(fileData.get("absoluteFilePath"));     

byte originalBytes = new String(originalFile).getBytes("UTF-8");

String originalHex = DatatypeConverter.printHexBinary(originalBytes);



byte otsFile = Files.readAllBytes(fileData.get("otsFilePath"));

byte otsBytes = new String(otsFile).getBytes("UTF-8");

String otsHex = DatatypeConverter.printHexBinary(otsBytes);



// below is from the examples...



DetachedTimestampFile detached = DetachedTimestampFile.from( new OpSHA256(), originalFile );

DetachedTimestampFile detachedOts = DetachedTimestampFile.deserialize(ots);



HashMap<Chains, VerifyResult> result = OpenTimestamps.verify(detachedOts,detached);

And this the exception:

java.lang.NullPointerException: null

    at com.eternitywall.ots.Timestamp.doTagOrAttestation(Timestamp.java:101) ~[java-opentimestamps-1.16.jar:na]

    at com.eternitywall.ots.Timestamp.deserialize(Timestamp.java:89) ~[java-opentimestamps-1.16.jar:na]

    at com.eternitywall.ots.DetachedTimestampFile.deserialize(DetachedTimestampFile.java:107) ~[java-opentimestamps-1.16.jar:na]

    at com.eternitywall.ots.DetachedTimestampFile.deserialize(DetachedTimestampFile.java:120) ~[java-opentimestamps-1.16.jar:na]

    at com.fmr.ots.FileTimestampController.verifyDocument(FileTimestampController.java:110) ~[classes/:na]

Does anyone know how to correctly read the original file and ots file in order to correctly verify the file?

asked Nov 15 at 11:03

simbro

507626

When I try to verify a timestamp using the Java library, I am running into a Java NullPointerException.

I'm following the examples in the README of https://github.com/opentimestamps/java-opentimestamps

This is my code:

byte originalFile = Files.readAllBytes(fileData.get("absoluteFilePath"));     

byte originalBytes = new String(originalFile).getBytes("UTF-8");

String originalHex = DatatypeConverter.printHexBinary(originalBytes);



byte otsFile = Files.readAllBytes(fileData.get("otsFilePath"));

byte otsBytes = new String(otsFile).getBytes("UTF-8");

String otsHex = DatatypeConverter.printHexBinary(otsBytes);



// below is from the examples...



DetachedTimestampFile detached = DetachedTimestampFile.from( new OpSHA256(), originalFile );

DetachedTimestampFile detachedOts = DetachedTimestampFile.deserialize(ots);



HashMap<Chains, VerifyResult> result = OpenTimestamps.verify(detachedOts,detached);

And this the exception:

java.lang.NullPointerException: null

    at com.eternitywall.ots.Timestamp.doTagOrAttestation(Timestamp.java:101) ~[java-opentimestamps-1.16.jar:na]

    at com.eternitywall.ots.Timestamp.deserialize(Timestamp.java:89) ~[java-opentimestamps-1.16.jar:na]

    at com.eternitywall.ots.DetachedTimestampFile.deserialize(DetachedTimestampFile.java:107) ~[java-opentimestamps-1.16.jar:na]

    at com.eternitywall.ots.DetachedTimestampFile.deserialize(DetachedTimestampFile.java:120) ~[java-opentimestamps-1.16.jar:na]

    at com.fmr.ots.FileTimestampController.verifyDocument(FileTimestampController.java:110) ~[classes/:na]

Does anyone know how to correctly read the original file and ots file in order to correctly verify the file?

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asked Nov 15 at 11:03

simbro

507626

asked Nov 15 at 11:03

simbro

507626

asked Nov 15 at 11:03

simbro

507626

asked Nov 15 at 11:03

simbro

507626

asked Nov 15 at 11:03

simbro

507626

Possible duplicate of What is a NullPointerException, and how do I fix it?
– Progman
Nov 15 at 13:22

Thanks Progman - though I don't see how it relates to my problem - the parameters I'm passing to the Opentimestamps class is not a null pointer.
– simbro
Nov 15 at 15:27

Please edit your question to include a MCVE which can be compiled and tested by others, which will throw the NullPointerException you get.
– Progman
Nov 15 at 15:33

add a comment |

Possible duplicate of What is a NullPointerException, and how do I fix it?
– Progman
Nov 15 at 13:22

Thanks Progman - though I don't see how it relates to my problem - the parameters I'm passing to the Opentimestamps class is not a null pointer.
– simbro
Nov 15 at 15:27

Please edit your question to include a MCVE which can be compiled and tested by others, which will throw the NullPointerException you get.
– Progman
Nov 15 at 15:33

Possible duplicate of What is a NullPointerException, and how do I fix it?
– Progman
Nov 15 at 13:22

Thanks Progman - though I don't see how it relates to my problem - the parameters I'm passing to the Opentimestamps class is not a null pointer.
– simbro
Nov 15 at 15:27

Please edit your question to include a MCVE which can be compiled and tested by others, which will throw the NullPointerException you get.
– Progman
Nov 15 at 15:33

add a comment |

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