# How can I use publicExponent as 65537 in RSA-OAEP algorithm in JavaScript?

Actually, I am using RSA-OAEP with SHA-256ANDMGF1PADDING for encryption and decryption in JavaScript using Web crypto API. The actual scenario I need to do is in java I am able to encrypt and decrypt using a public and private key with the same algorithm specifications. but there it uses a 65537 public exponent .now what I need to do is encrypt some message in JavaScript using public key and decrypt it in java. but I found that in JavaScript for the above-mentioned algorithm specification it uses Public exponent as 5. so I want to change it to 65537. I tried to use the following code in JavaScript.

```  window.crypto.subtle.generateKey({
name: "RSA-OAEP",
modulusLength: 2048,
publicExponent: new Uint8Array([0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 0x01]),
hash: {name: "SHA-256"},
},
true,
["encrypt", "decrypt"]);
```

but still, the public exponent of the generated public key is 5. what wrong I am doing? The final requirement of me is, Encrypt some message in JavaScript using RSA-OAEP with SHA-256ANDMGF1PADDING and which will be able to decrypt in java using the private key and vice versa.

Use this. It is equivalent to 65537:

``` publicExponent: new Uint8Array([0x01, 0x00, 0x01])
```

The `publicExponent` is a BigInteger Each element in the uint8 array is a non negative integer in the range 0..256

1. BigInteger
```typedef Uint8Array BigInteger;
```

The BigInteger typedef is a Uint8Array that holds an arbitrary magnitude unsigned integer in big-endian order.

```[0x01, 0x00, 0x01] = 00000001 00000000 00000001 = 65537
```