Use static variable from JAR file
0
I've created a runnable JAR file which has a class with this code:
static KeysetHandle keysetHandle = null;
public String encrypt(String plainText){
Config.register(AeadConfig.TINK_1_1_0);
// GENERATE key
// key generated using tink library
keysetHandle = KeysetHandle.generateNew(AeadKeyTemplates.AES256_GCM);
}
public String decrypt(String cipherText){
//using the key generated during encryption to decrypt
Aead aeadDecryption = AeadFactory.getPrimitive(keysetHandle);
}
In my other Java application I've imported this JAR file as an external JAR file and am trying to run these methods:
import core.Crypto;
public class Sample {
public static void main(String args) {
// TODO Auto-generated method stub
Crypto crypto = new Crypto();
System.out.println(crypto.encrypt("sampleText"));
System.out.println(crypto.decrypt("XXX"));
}
}
The encrypt function works as expected, but the decrypt returns a NullPointerException because keysetHandle is null. How do I get the updated value for keysetHandle?
java tink
asked Nov 19 '18 at 3:24
sibi chakravarthysibi chakravarthy
134
|
show 1 more comment
0
I've created a runnable JAR file which has a class with this code:
static KeysetHandle keysetHandle = null;
public String encrypt(String plainText){
Config.register(AeadConfig.TINK_1_1_0);
// GENERATE key
// key generated using tink library
keysetHandle = KeysetHandle.generateNew(AeadKeyTemplates.AES256_GCM);
}
public String decrypt(String cipherText){
//using the key generated during encryption to decrypt
Aead aeadDecryption = AeadFactory.getPrimitive(keysetHandle);
}
In my other Java application I've imported this JAR file as an external JAR file and am trying to run these methods:
import core.Crypto;
public class Sample {
public static void main(String args) {
// TODO Auto-generated method stub
Crypto crypto = new Crypto();
System.out.println(crypto.encrypt("sampleText"));
System.out.println(crypto.decrypt("XXX"));
}
}
The encrypt function works as expected, but the decrypt returns a NullPointerException because keysetHandle is null. How do I get the updated value for keysetHandle?
java tink
asked Nov 19 '18 at 3:24
sibi chakravarthysibi chakravarthy
134
1
You should provide more details about how keysetHandle is getting initialized? Is it based on a certain condition? Also an observation, why are you depending on initialization of static variable from non-static method? The approach isn't correct.
– CuriousMind
Nov 19 '18 at 4:15
Added more detail to the code. I'm using static variable so that I can access it from both methods. Is there a better way?
– sibi chakravarthy
Nov 19 '18 at 16:44
It doesn't have to be static. You can still access it from both methods.
– DodgyCodeException
Nov 19 '18 at 16:50
You should have a look atgenerateNewmethod and figure out under what circumstances it can return a null value. That will provide a clue about your problem.
– CuriousMind
Nov 20 '18 at 4:27
@CuriousMind github.com/google/tink/blob/master/java/src/main/java/com/… shows thatgenerateNewnever returns null. It's more likely another thread is setting the static field to null.
– DodgyCodeException
Nov 20 '18 at 9:40
|
show 1 more comment
0
0
0
I've created a runnable JAR file which has a class with this code:
static KeysetHandle keysetHandle = null;
public String encrypt(String plainText){
Config.register(AeadConfig.TINK_1_1_0);
// GENERATE key
// key generated using tink library
keysetHandle = KeysetHandle.generateNew(AeadKeyTemplates.AES256_GCM);
}
public String decrypt(String cipherText){
//using the key generated during encryption to decrypt
Aead aeadDecryption = AeadFactory.getPrimitive(keysetHandle);
}
In my other Java application I've imported this JAR file as an external JAR file and am trying to run these methods:
import core.Crypto;
public class Sample {
public static void main(String args) {
// TODO Auto-generated method stub
Crypto crypto = new Crypto();
System.out.println(crypto.encrypt("sampleText"));
System.out.println(crypto.decrypt("XXX"));
}
}
The encrypt function works as expected, but the decrypt returns a NullPointerException because keysetHandle is null. How do I get the updated value for keysetHandle?
java tink
asked Nov 19 '18 at 3:24
sibi chakravarthysibi chakravarthy
134
I've created a runnable JAR file which has a class with this code:
static KeysetHandle keysetHandle = null;
public String encrypt(String plainText){
Config.register(AeadConfig.TINK_1_1_0);
// GENERATE key
// key generated using tink library
keysetHandle = KeysetHandle.generateNew(AeadKeyTemplates.AES256_GCM);
}
public String decrypt(String cipherText){
//using the key generated during encryption to decrypt
Aead aeadDecryption = AeadFactory.getPrimitive(keysetHandle);
}
In my other Java application I've imported this JAR file as an external JAR file and am trying to run these methods:
import core.Crypto;
public class Sample {
public static void main(String args) {
// TODO Auto-generated method stub
Crypto crypto = new Crypto();
System.out.println(crypto.encrypt("sampleText"));
System.out.println(crypto.decrypt("XXX"));
}
}
The encrypt function works as expected, but the decrypt returns a NullPointerException because keysetHandle is null. How do I get the updated value for keysetHandle?
java tink
java tink
asked Nov 19 '18 at 3:24
sibi chakravarthysibi chakravarthy
134
asked Nov 19 '18 at 3:24
sibi chakravarthysibi chakravarthy
134
edited Nov 19 '18 at 16:39
sibi chakravarthy
asked Nov 19 '18 at 3:24
sibi chakravarthysibi chakravarthy
134
asked Nov 19 '18 at 3:24
sibi chakravarthysibi chakravarthy
134
asked Nov 19 '18 at 3:24
sibi chakravarthysibi chakravarthy
134
134
1
You should provide more details about how keysetHandle is getting initialized? Is it based on a certain condition? Also an observation, why are you depending on initialization of static variable from non-static method? The approach isn't correct.
– CuriousMind
Nov 19 '18 at 4:15
Added more detail to the code. I'm using static variable so that I can access it from both methods. Is there a better way?
– sibi chakravarthy
Nov 19 '18 at 16:44
It doesn't have to be static. You can still access it from both methods.
– DodgyCodeException
Nov 19 '18 at 16:50
You should have a look atgenerateNewmethod and figure out under what circumstances it can return a null value. That will provide a clue about your problem.
– CuriousMind
Nov 20 '18 at 4:27
@CuriousMind github.com/google/tink/blob/master/java/src/main/java/com/… shows thatgenerateNewnever returns null. It's more likely another thread is setting the static field to null.
– DodgyCodeException
Nov 20 '18 at 9:40
|
show 1 more comment
1
You should provide more details about how keysetHandle is getting initialized? Is it based on a certain condition? Also an observation, why are you depending on initialization of static variable from non-static method? The approach isn't correct.
– CuriousMind
Nov 19 '18 at 4:15
Added more detail to the code. I'm using static variable so that I can access it from both methods. Is there a better way?
– sibi chakravarthy
Nov 19 '18 at 16:44
It doesn't have to be static. You can still access it from both methods.
– DodgyCodeException
Nov 19 '18 at 16:50
You should have a look atgenerateNewmethod and figure out under what circumstances it can return a null value. That will provide a clue about your problem.
– CuriousMind
Nov 20 '18 at 4:27
@CuriousMind github.com/google/tink/blob/master/java/src/main/java/com/… shows thatgenerateNewnever returns null. It's more likely another thread is setting the static field to null.
– DodgyCodeException
Nov 20 '18 at 9:40
1
1
You should provide more details about how keysetHandle is getting initialized? Is it based on a certain condition? Also an observation, why are you depending on initialization of static variable from non-static method? The approach isn't correct.
– CuriousMind
Nov 19 '18 at 4:15
You should provide more details about how keysetHandle is getting initialized? Is it based on a certain condition? Also an observation, why are you depending on initialization of static variable from non-static method? The approach isn't correct.
– CuriousMind
Nov 19 '18 at 4:15
Added more detail to the code. I'm using static variable so that I can access it from both methods. Is there a better way?
– sibi chakravarthy
Nov 19 '18 at 16:44
Added more detail to the code. I'm using static variable so that I can access it from both methods. Is there a better way?
– sibi chakravarthy
Nov 19 '18 at 16:44
It doesn't have to be static. You can still access it from both methods.
– DodgyCodeException
Nov 19 '18 at 16:50
It doesn't have to be static. You can still access it from both methods.
– DodgyCodeException
Nov 19 '18 at 16:50
You should have a look at
generateNew method and figure out under what circumstances it can return a null value. That will provide a clue about your problem.– CuriousMind
Nov 20 '18 at 4:27
You should have a look at
generateNew method and figure out under what circumstances it can return a null value. That will provide a clue about your problem.– CuriousMind
Nov 20 '18 at 4:27
@CuriousMind github.com/google/tink/blob/master/java/src/main/java/com/… shows that
generateNew never returns null. It's more likely another thread is setting the static field to null.– DodgyCodeException
Nov 20 '18 at 9:40
@CuriousMind github.com/google/tink/blob/master/java/src/main/java/com/… shows that
generateNew never returns null. It's more likely another thread is setting the static field to null.– DodgyCodeException
Nov 20 '18 at 9:40
|
show 1 more comment
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1
You should provide more details about how keysetHandle is getting initialized? Is it based on a certain condition? Also an observation, why are you depending on initialization of static variable from non-static method? The approach isn't correct.
– CuriousMind
Nov 19 '18 at 4:15
Added more detail to the code. I'm using static variable so that I can access it from both methods. Is there a better way?
– sibi chakravarthy
Nov 19 '18 at 16:44
It doesn't have to be static. You can still access it from both methods.
– DodgyCodeException
Nov 19 '18 at 16:50
You should have a look at
generateNewmethod and figure out under what circumstances it can return a null value. That will provide a clue about your problem.– CuriousMind
Nov 20 '18 at 4:27
@CuriousMind github.com/google/tink/blob/master/java/src/main/java/com/… shows that
generateNewnever returns null. It's more likely another thread is setting the static field to null.– DodgyCodeException
Nov 20 '18 at 9:40