CODEWITHSUNDEEP
javascriptjavanode.jscryptography
fgonzalez
fgonzalez

Reputation: 3877

Generate unique key in Java

We are migrating a server project coded using NodeJs to one coded in Java. I'm not very into the cryptography thing but I need to "translate" the following instruction to Java.

crypto.randomBytes(32).toString('hex');

Basically in the node js project they were using the js library crypto to generate a unique key, and I would need to do the same, no more, no less, in java. Anyone with crypto knowledge that can help here? What would be the equivalent in Java?

Thanks

Upvotes: 0

Views: 1596

Answers (4)

Sándor Juhos
Sándor Juhos

Reputation: 1615

Try this:

SecureRandom random = new SecureRandom();
new BigInteger(256, random).toString(32);

Upvotes: 0

John K
John K

Reputation: 462

You can use 

Random.nextBytes(byte[] bytes)

to populate a random byte array and then convert the bytes to hex using the strategies discussed here

Upvotes: 1

Deceiver
Deceiver

Reputation: 324

You can use the UUID from java:

UUID.randomUUID()

Through a quick search on google I got https://paragonie.com/blog/2016/05/how-generate-secure-random-numbers-in-various-programming-languages, have a look and for your case the closest thing will be:

SecureRandom csprng = new SecureRandom();
byte[] randomBytes = new byte[32];
csprng.nextBytes(randombytes);

This is in the blog. Hope it helps.

Upvotes: 1

PKey
PKey

Reputation: 3841

You could probably use something like this 

import java.util.uuid;
...

UUID  newUUID = UUID.randomUUID();

String.valueOf(newUUID);

...

Upvotes: 2

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