得到Java和Z686155AF75A60A0D36E9D80C1F7中加密字符串的Base64编码output相同

Question

After getting byte array encryptedMessageInBytes from AES encryption function call cipher.doFinal in Java, I convert the byte array to base64 like this:

String encryptedMessageInBase64 = new String(Base64.getEncoder().encode(encryptedMessageInBytes));

In JavaScript, I simply do .toString() to the output I get from CryptoJS.AES.encrypt method and I get exact same base64 string. ie

var encryptedMessageInBase64 = CryptoJS.AES.encrypt("Message", "Secret Passphrase").toString();

It gives same base64 string as in Java code.

However, in one of the Java source code, they have done like this:

String encryptedMessageInBase64 = Base64.getUrlEncoder().encodeToString(encryptedMessageInBytes);

What shall I do in JavaScript to obtain same base64 string?

Answer 1

Here is answer:

However, in one of the Java source code, they have done like this:

String encryptedMessageInBase64 = Base64.getUrlEncoder().encodeToString(encryptedMessageInBytes);*

Here, basically they have done UrlEncoding instead of Base64 encoding. It is nothing but replacing + and / characters with - and _ characters. Url encoding is when we want to send encoded string over HTTP where it treats these two as special characters this is why we need to replace them with some other characters which are HTTP friendly.