CODEWITHSUNDEEP
androidbase64
Simpson
Simpson

Reputation: 292

Why Base64 encoding in openssl commandline differs from android.util.Base64

I want to understand why there is a difference between encoding in openssl commandline to those done via android.util.Base64

// contents of data.out = "a"

openssl base64 -A -in data.out -out data_enc.out

cat data_enc.out

YQo=

I tried using android's Base64, but couldn't get the same output. I tried with diff charsets and all possible Flag values.

 String str = "a";
    int[] flags = new int[]{Base64.DEFAULT, Base64.CRLF, Base64.NO_CLOSE, Base64.NO_PADDING,
        Base64.NO_WRAP, Base64.URL_SAFE};
    int count= 0;
    for(int flag: flags) {
      String encStr = Base64.encodeToString(str.getBytes(StandardCharsets.UTF_8), flag);
      android.util.Log.i("CERT_LOG", "UTF_8: " + (count) + " Encoded data value in code " + encStr);
      encStr = Base64.encodeToString(str.getBytes(StandardCharsets.UTF_16LE), flag);
      android.util.Log.i("CERT_LOG",
          "UTF_16LE: "+ (count) + " Encoded data value in code " + encStr);
      encStr = Base64.encodeToString(str.getBytes(StandardCharsets.UTF_16), flag);
      android.util.Log.i("CERT_LOG",
          "UTF_16: "+ (count) +" Encoded data value in code " + encStr);
      encStr = Base64.encodeToString(str.getBytes(StandardCharsets.UTF_16BE), flag);
      android.util.Log.i("CERT_LOG",
          "UTF_16BE: "+ (count) +" Encoded data value in code " + encStr);
      encStr = Base64.encodeToString(str.getBytes(StandardCharsets.US_ASCII), flag);
      android.util.Log.i("CERT_LOG",
          "US_ASCII: "+ (count) +" Encoded data value in code " + encStr);
      encStr = Base64.encodeToString(str.getBytes(StandardCharsets.ISO_8859_1), flag);
      android.util.Log.i("CERT_LOG", "ISO_8859_1: "+ (count++) +" Encoded data value in code " + encStr);
    }

But none of the output matched with those from commandline. Can someone throw some light on what am I missing.

Upvotes: 0

Views: 320

Answers (1)

Joni
Joni

Reputation: 111239

Your text file includes a line feed at the end of the file. To get the same output on Android, add \n to your input string:

 String str = "a\n";

Upvotes: 1

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