How do I retrieve an IVParameterSpec after base64 decode?
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1
EDIT: For those asking to see the entire methods/classes
I have a class Encrypter which creates an IVParameterSpec in a constructor, encodes the IVParameterSpec in the Encoder method and returns the IVParameterSpec in the GetIV method.
This is the Encrypter class
public class Encrypter
{
public IVParameterSpec ctr_iv;
public Encrypter(int keylength)
{
//ctr_iv is created in this constructor
byte counter = new byte[16];
ctr_iv = new IvParameterSpec(counter);
System.out.println("The iv is " + ctr_iv);
}
public String Encoder()
{
String encoded_IV = Base64.getEncoder().encodeToString(ctr_iv.getIV());
return encoded_IV;
}
public IvParameterSpec getIV()
{
return ctr_iv;
}
}
I have a class Decrypter that decodes the IVParameterSpec in a constructor and returns the IVParameterSpec in the GetIV method.
public class Decrypter
{
IvParameterSpec retrieved_iv;
public Decrypter(String iv)
{
byte decodedIV = Base64.getDecoder().decode(iv);
retrieved_iv = new IvParameterSpec(decodedIV);
System.out.println("The iv in this class is " + retrieved_iv);
}
public IvParameterSpec getIV()
{
return retrieved_iv;
}
}
My aim is to make sure that retrieved_iv in the Decryptor class is equal to the ctr_iv in the Encrypter class. I initially thought the constructors above would do the trick. But when I tested their values for equality, I found out that they were not equal. This is how I tested them:
public class Main
{
public static void main(String args)
{
Encrypter encrypter = new Encrypter(); //Initializes ctr_iv
Decrypter decrypter = new Decrypter(encrypter.Encoder()); //Encodes ctr_iv in first object and passes it as an argument to the constructor of the 2nd object
if(encrypter.GetIV().equals(decrypter.GetIV()))
{
System.out.println("IV's are equal");
}else{System.out.println("IV's are not equal");}
}
}
I have a feeling this has something to do with how I'm decoding the string in the Decrypter constructor.
java encryption encoding decode
asked Nov 23 '18 at 15:00
VktrVktr
206
|
show 1 more comment
1
EDIT: For those asking to see the entire methods/classes
I have a class Encrypter which creates an IVParameterSpec in a constructor, encodes the IVParameterSpec in the Encoder method and returns the IVParameterSpec in the GetIV method.
This is the Encrypter class
public class Encrypter
{
public IVParameterSpec ctr_iv;
public Encrypter(int keylength)
{
//ctr_iv is created in this constructor
byte counter = new byte[16];
ctr_iv = new IvParameterSpec(counter);
System.out.println("The iv is " + ctr_iv);
}
public String Encoder()
{
String encoded_IV = Base64.getEncoder().encodeToString(ctr_iv.getIV());
return encoded_IV;
}
public IvParameterSpec getIV()
{
return ctr_iv;
}
}
I have a class Decrypter that decodes the IVParameterSpec in a constructor and returns the IVParameterSpec in the GetIV method.
public class Decrypter
{
IvParameterSpec retrieved_iv;
public Decrypter(String iv)
{
byte decodedIV = Base64.getDecoder().decode(iv);
retrieved_iv = new IvParameterSpec(decodedIV);
System.out.println("The iv in this class is " + retrieved_iv);
}
public IvParameterSpec getIV()
{
return retrieved_iv;
}
}
My aim is to make sure that retrieved_iv in the Decryptor class is equal to the ctr_iv in the Encrypter class. I initially thought the constructors above would do the trick. But when I tested their values for equality, I found out that they were not equal. This is how I tested them:
public class Main
{
public static void main(String args)
{
Encrypter encrypter = new Encrypter(); //Initializes ctr_iv
Decrypter decrypter = new Decrypter(encrypter.Encoder()); //Encodes ctr_iv in first object and passes it as an argument to the constructor of the 2nd object
if(encrypter.GetIV().equals(decrypter.GetIV()))
{
System.out.println("IV's are equal");
}else{System.out.println("IV's are not equal");}
}
}
I have a feeling this has something to do with how I'm decoding the string in the Decrypter constructor.
java encryption encoding decode
asked Nov 23 '18 at 15:00
VktrVktr
206
3
"... it turns out that this just creates a different IVParameterSpec..."? How do you know they're different? Different in what way? They will certainly be different objects, but they will represent (and encapsulate) the same IV.
– James K Polk
Nov 23 '18 at 17:24
I printed out the IVParameterSpec from both methods and they were different.
– Vktr
Nov 23 '18 at 20:29
<Sigh> Printed them out how? Post the code you used that proved to you that they're different.
– James K Polk
Nov 24 '18 at 0:12
1
Finally, we have the source of your confusion.
– James K Polk
Nov 24 '18 at 14:21
1
Possible duplicate of How does an array's equal method work?
– James K Polk
Nov 24 '18 at 14:21
|
show 1 more comment
1
1
1
EDIT: For those asking to see the entire methods/classes
I have a class Encrypter which creates an IVParameterSpec in a constructor, encodes the IVParameterSpec in the Encoder method and returns the IVParameterSpec in the GetIV method.
This is the Encrypter class
public class Encrypter
{
public IVParameterSpec ctr_iv;
public Encrypter(int keylength)
{
//ctr_iv is created in this constructor
byte counter = new byte[16];
ctr_iv = new IvParameterSpec(counter);
System.out.println("The iv is " + ctr_iv);
}
public String Encoder()
{
String encoded_IV = Base64.getEncoder().encodeToString(ctr_iv.getIV());
return encoded_IV;
}
public IvParameterSpec getIV()
{
return ctr_iv;
}
}
I have a class Decrypter that decodes the IVParameterSpec in a constructor and returns the IVParameterSpec in the GetIV method.
public class Decrypter
{
IvParameterSpec retrieved_iv;
public Decrypter(String iv)
{
byte decodedIV = Base64.getDecoder().decode(iv);
retrieved_iv = new IvParameterSpec(decodedIV);
System.out.println("The iv in this class is " + retrieved_iv);
}
public IvParameterSpec getIV()
{
return retrieved_iv;
}
}
My aim is to make sure that retrieved_iv in the Decryptor class is equal to the ctr_iv in the Encrypter class. I initially thought the constructors above would do the trick. But when I tested their values for equality, I found out that they were not equal. This is how I tested them:
public class Main
{
public static void main(String args)
{
Encrypter encrypter = new Encrypter(); //Initializes ctr_iv
Decrypter decrypter = new Decrypter(encrypter.Encoder()); //Encodes ctr_iv in first object and passes it as an argument to the constructor of the 2nd object
if(encrypter.GetIV().equals(decrypter.GetIV()))
{
System.out.println("IV's are equal");
}else{System.out.println("IV's are not equal");}
}
}
I have a feeling this has something to do with how I'm decoding the string in the Decrypter constructor.
java encryption encoding decode
asked Nov 23 '18 at 15:00
VktrVktr
206
EDIT: For those asking to see the entire methods/classes
I have a class Encrypter which creates an IVParameterSpec in a constructor, encodes the IVParameterSpec in the Encoder method and returns the IVParameterSpec in the GetIV method.
This is the Encrypter class
public class Encrypter
{
public IVParameterSpec ctr_iv;
public Encrypter(int keylength)
{
//ctr_iv is created in this constructor
byte counter = new byte[16];
ctr_iv = new IvParameterSpec(counter);
System.out.println("The iv is " + ctr_iv);
}
public String Encoder()
{
String encoded_IV = Base64.getEncoder().encodeToString(ctr_iv.getIV());
return encoded_IV;
}
public IvParameterSpec getIV()
{
return ctr_iv;
}
}
I have a class Decrypter that decodes the IVParameterSpec in a constructor and returns the IVParameterSpec in the GetIV method.
public class Decrypter
{
IvParameterSpec retrieved_iv;
public Decrypter(String iv)
{
byte decodedIV = Base64.getDecoder().decode(iv);
retrieved_iv = new IvParameterSpec(decodedIV);
System.out.println("The iv in this class is " + retrieved_iv);
}
public IvParameterSpec getIV()
{
return retrieved_iv;
}
}
My aim is to make sure that retrieved_iv in the Decryptor class is equal to the ctr_iv in the Encrypter class. I initially thought the constructors above would do the trick. But when I tested their values for equality, I found out that they were not equal. This is how I tested them:
public class Main
{
public static void main(String args)
{
Encrypter encrypter = new Encrypter(); //Initializes ctr_iv
Decrypter decrypter = new Decrypter(encrypter.Encoder()); //Encodes ctr_iv in first object and passes it as an argument to the constructor of the 2nd object
if(encrypter.GetIV().equals(decrypter.GetIV()))
{
System.out.println("IV's are equal");
}else{System.out.println("IV's are not equal");}
}
}
I have a feeling this has something to do with how I'm decoding the string in the Decrypter constructor.
java encryption encoding decode
java encryption encoding decode
asked Nov 23 '18 at 15:00
VktrVktr
206
asked Nov 23 '18 at 15:00
VktrVktr
206
edited Nov 25 '18 at 11:45
Vktr
asked Nov 23 '18 at 15:00
VktrVktr
206
asked Nov 23 '18 at 15:00
VktrVktr
206
asked Nov 23 '18 at 15:00
VktrVktr
206
206
3
"... it turns out that this just creates a different IVParameterSpec..."? How do you know they're different? Different in what way? They will certainly be different objects, but they will represent (and encapsulate) the same IV.
– James K Polk
Nov 23 '18 at 17:24
I printed out the IVParameterSpec from both methods and they were different.
– Vktr
Nov 23 '18 at 20:29
<Sigh> Printed them out how? Post the code you used that proved to you that they're different.
– James K Polk
Nov 24 '18 at 0:12
1
Finally, we have the source of your confusion.
– James K Polk
Nov 24 '18 at 14:21
1
Possible duplicate of How does an array's equal method work?
– James K Polk
Nov 24 '18 at 14:21
|
show 1 more comment
3
"... it turns out that this just creates a different IVParameterSpec..."? How do you know they're different? Different in what way? They will certainly be different objects, but they will represent (and encapsulate) the same IV.
– James K Polk
Nov 23 '18 at 17:24
I printed out the IVParameterSpec from both methods and they were different.
– Vktr
Nov 23 '18 at 20:29
<Sigh> Printed them out how? Post the code you used that proved to you that they're different.
– James K Polk
Nov 24 '18 at 0:12
1
Finally, we have the source of your confusion.
– James K Polk
Nov 24 '18 at 14:21
1
Possible duplicate of How does an array's equal method work?
– James K Polk
Nov 24 '18 at 14:21
3
3
"... it turns out that this just creates a different IVParameterSpec..."? How do you know they're different? Different in what way? They will certainly be different objects, but they will represent (and encapsulate) the same IV.
– James K Polk
Nov 23 '18 at 17:24
"... it turns out that this just creates a different IVParameterSpec..."? How do you know they're different? Different in what way? They will certainly be different objects, but they will represent (and encapsulate) the same IV.
– James K Polk
Nov 23 '18 at 17:24
I printed out the IVParameterSpec from both methods and they were different.
– Vktr
Nov 23 '18 at 20:29
I printed out the IVParameterSpec from both methods and they were different.
– Vktr
Nov 23 '18 at 20:29
<Sigh> Printed them out how? Post the code you used that proved to you that they're different.
– James K Polk
Nov 24 '18 at 0:12
<Sigh> Printed them out how? Post the code you used that proved to you that they're different.
– James K Polk
Nov 24 '18 at 0:12
1
1
Finally, we have the source of your confusion.
– James K Polk
Nov 24 '18 at 14:21
Finally, we have the source of your confusion.
– James K Polk
Nov 24 '18 at 14:21
1
1
Possible duplicate of How does an array's equal method work?
– James K Polk
Nov 24 '18 at 14:21
Possible duplicate of How does an array's equal method work?
– James K Polk
Nov 24 '18 at 14:21
|
show 1 more comment
1 Answer
1
active
oldest
votes
3
Compare by Arrays.equals.
if(Arrays.equals(ctr_iv.getIV(),retrieved_iv.getIV())) {
System.out.println("IV's are equal");
} else {
System.out.println("IV's are not equal");
}
answered Nov 23 '18 at 18:53
kelalakakelalaka
1,61331225
The Encoder and Decoder methods are in separate classes (sorry i didn't mention this earlier. I'll edit the description). So I don't think this would work.
– Vktr
Nov 23 '18 at 20:22
@Vktr when you print the values aren't they same?
– kelalaka
Nov 23 '18 at 20:24
Exactly. I even used a conditional statement that checks if they're equal. If they are equal, print "Pass", otherwise print "Fail". But it prints Fail every time.
– Vktr
Nov 23 '18 at 20:28
@Vktr how you compare? how you transfer the IV between the two classes?
– kelalaka
Nov 23 '18 at 20:30
The Encoder method is in a class called Encrypter and the Decoder method is in a class called Decrypter. In the Encrypter class, I created a method called GetIV(), which simply returns ctr_iv and in the Decrypter class, I have a method called GetIV() which simply returns retrieved_iv. In the Main class, I created objects for both Encryptor (encrypterobject) and Decryptor (decrypterobject). Then I called the Encoder method to encrypt the IV and then I called the Decoder method, where I passed encrypterobject.Encoder() as the string argument.
– Vktr
Nov 23 '18 at 20:37
|
show 9 more comments
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3
Compare by Arrays.equals.
if(Arrays.equals(ctr_iv.getIV(),retrieved_iv.getIV())) {
System.out.println("IV's are equal");
} else {
System.out.println("IV's are not equal");
}
answered Nov 23 '18 at 18:53
kelalakakelalaka
1,61331225
The Encoder and Decoder methods are in separate classes (sorry i didn't mention this earlier. I'll edit the description). So I don't think this would work.
– Vktr
Nov 23 '18 at 20:22
@Vktr when you print the values aren't they same?
– kelalaka
Nov 23 '18 at 20:24
Exactly. I even used a conditional statement that checks if they're equal. If they are equal, print "Pass", otherwise print "Fail". But it prints Fail every time.
– Vktr
Nov 23 '18 at 20:28
@Vktr how you compare? how you transfer the IV between the two classes?
– kelalaka
Nov 23 '18 at 20:30
The Encoder method is in a class called Encrypter and the Decoder method is in a class called Decrypter. In the Encrypter class, I created a method called GetIV(), which simply returns ctr_iv and in the Decrypter class, I have a method called GetIV() which simply returns retrieved_iv. In the Main class, I created objects for both Encryptor (encrypterobject) and Decryptor (decrypterobject). Then I called the Encoder method to encrypt the IV and then I called the Decoder method, where I passed encrypterobject.Encoder() as the string argument.
– Vktr
Nov 23 '18 at 20:37
|
show 9 more comments
3
Compare by Arrays.equals.
if(Arrays.equals(ctr_iv.getIV(),retrieved_iv.getIV())) {
System.out.println("IV's are equal");
} else {
System.out.println("IV's are not equal");
}
answered Nov 23 '18 at 18:53
kelalakakelalaka
1,61331225
The Encoder and Decoder methods are in separate classes (sorry i didn't mention this earlier. I'll edit the description). So I don't think this would work.
– Vktr
Nov 23 '18 at 20:22
@Vktr when you print the values aren't they same?
– kelalaka
Nov 23 '18 at 20:24
Exactly. I even used a conditional statement that checks if they're equal. If they are equal, print "Pass", otherwise print "Fail". But it prints Fail every time.
– Vktr
Nov 23 '18 at 20:28
@Vktr how you compare? how you transfer the IV between the two classes?
– kelalaka
Nov 23 '18 at 20:30
The Encoder method is in a class called Encrypter and the Decoder method is in a class called Decrypter. In the Encrypter class, I created a method called GetIV(), which simply returns ctr_iv and in the Decrypter class, I have a method called GetIV() which simply returns retrieved_iv. In the Main class, I created objects for both Encryptor (encrypterobject) and Decryptor (decrypterobject). Then I called the Encoder method to encrypt the IV and then I called the Decoder method, where I passed encrypterobject.Encoder() as the string argument.
– Vktr
Nov 23 '18 at 20:37
|
show 9 more comments
3
3
3
Compare by Arrays.equals.
if(Arrays.equals(ctr_iv.getIV(),retrieved_iv.getIV())) {
System.out.println("IV's are equal");
} else {
System.out.println("IV's are not equal");
}
answered Nov 23 '18 at 18:53
kelalakakelalaka
1,61331225
Compare by Arrays.equals.
if(Arrays.equals(ctr_iv.getIV(),retrieved_iv.getIV())) {
System.out.println("IV's are equal");
} else {
System.out.println("IV's are not equal");
}
answered Nov 23 '18 at 18:53
kelalakakelalaka
1,61331225
edited Nov 24 '18 at 18:27
answered Nov 23 '18 at 18:53
kelalakakelalaka
1,61331225
answered Nov 23 '18 at 18:53
kelalakakelalaka
1,61331225
answered Nov 23 '18 at 18:53
kelalakakelalaka
1,61331225
1,61331225
The Encoder and Decoder methods are in separate classes (sorry i didn't mention this earlier. I'll edit the description). So I don't think this would work.
– Vktr
Nov 23 '18 at 20:22
@Vktr when you print the values aren't they same?
– kelalaka
Nov 23 '18 at 20:24
Exactly. I even used a conditional statement that checks if they're equal. If they are equal, print "Pass", otherwise print "Fail". But it prints Fail every time.
– Vktr
Nov 23 '18 at 20:28
@Vktr how you compare? how you transfer the IV between the two classes?
– kelalaka
Nov 23 '18 at 20:30
The Encoder method is in a class called Encrypter and the Decoder method is in a class called Decrypter. In the Encrypter class, I created a method called GetIV(), which simply returns ctr_iv and in the Decrypter class, I have a method called GetIV() which simply returns retrieved_iv. In the Main class, I created objects for both Encryptor (encrypterobject) and Decryptor (decrypterobject). Then I called the Encoder method to encrypt the IV and then I called the Decoder method, where I passed encrypterobject.Encoder() as the string argument.
– Vktr
Nov 23 '18 at 20:37
|
show 9 more comments
The Encoder and Decoder methods are in separate classes (sorry i didn't mention this earlier. I'll edit the description). So I don't think this would work.
– Vktr
Nov 23 '18 at 20:22
@Vktr when you print the values aren't they same?
– kelalaka
Nov 23 '18 at 20:24
Exactly. I even used a conditional statement that checks if they're equal. If they are equal, print "Pass", otherwise print "Fail". But it prints Fail every time.
– Vktr
Nov 23 '18 at 20:28
@Vktr how you compare? how you transfer the IV between the two classes?
– kelalaka
Nov 23 '18 at 20:30
The Encoder method is in a class called Encrypter and the Decoder method is in a class called Decrypter. In the Encrypter class, I created a method called GetIV(), which simply returns ctr_iv and in the Decrypter class, I have a method called GetIV() which simply returns retrieved_iv. In the Main class, I created objects for both Encryptor (encrypterobject) and Decryptor (decrypterobject). Then I called the Encoder method to encrypt the IV and then I called the Decoder method, where I passed encrypterobject.Encoder() as the string argument.
– Vktr
Nov 23 '18 at 20:37
The Encoder and Decoder methods are in separate classes (sorry i didn't mention this earlier. I'll edit the description). So I don't think this would work.
– Vktr
Nov 23 '18 at 20:22
The Encoder and Decoder methods are in separate classes (sorry i didn't mention this earlier. I'll edit the description). So I don't think this would work.
– Vktr
Nov 23 '18 at 20:22
@Vktr when you print the values aren't they same?
– kelalaka
Nov 23 '18 at 20:24
@Vktr when you print the values aren't they same?
– kelalaka
Nov 23 '18 at 20:24
Exactly. I even used a conditional statement that checks if they're equal. If they are equal, print "Pass", otherwise print "Fail". But it prints Fail every time.
– Vktr
Nov 23 '18 at 20:28
Exactly. I even used a conditional statement that checks if they're equal. If they are equal, print "Pass", otherwise print "Fail". But it prints Fail every time.
– Vktr
Nov 23 '18 at 20:28
@Vktr how you compare? how you transfer the IV between the two classes?
– kelalaka
Nov 23 '18 at 20:30
@Vktr how you compare? how you transfer the IV between the two classes?
– kelalaka
Nov 23 '18 at 20:30
The Encoder method is in a class called Encrypter and the Decoder method is in a class called Decrypter. In the Encrypter class, I created a method called GetIV(), which simply returns ctr_iv and in the Decrypter class, I have a method called GetIV() which simply returns retrieved_iv. In the Main class, I created objects for both Encryptor (encrypterobject) and Decryptor (decrypterobject). Then I called the Encoder method to encrypt the IV and then I called the Decoder method, where I passed encrypterobject.Encoder() as the string argument.
– Vktr
Nov 23 '18 at 20:37
The Encoder method is in a class called Encrypter and the Decoder method is in a class called Decrypter. In the Encrypter class, I created a method called GetIV(), which simply returns ctr_iv and in the Decrypter class, I have a method called GetIV() which simply returns retrieved_iv. In the Main class, I created objects for both Encryptor (encrypterobject) and Decryptor (decrypterobject). Then I called the Encoder method to encrypt the IV and then I called the Decoder method, where I passed encrypterobject.Encoder() as the string argument.
– Vktr
Nov 23 '18 at 20:37
|
show 9 more comments
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3
"... it turns out that this just creates a different IVParameterSpec..."? How do you know they're different? Different in what way? They will certainly be different objects, but they will represent (and encapsulate) the same IV.
– James K Polk
Nov 23 '18 at 17:24
I printed out the IVParameterSpec from both methods and they were different.
– Vktr
Nov 23 '18 at 20:29
<Sigh> Printed them out how? Post the code you used that proved to you that they're different.
– James K Polk
Nov 24 '18 at 0:12
1
Finally, we have the source of your confusion.
– James K Polk
Nov 24 '18 at 14:21
1
Possible duplicate of How does an array's equal method work?
– James K Polk
Nov 24 '18 at 14:21