- Java base64 encode, decode yield different results
I'm using this:
import com.sun.org.apache.xml.internal.security.utils.Base64;to encode/decode Base64 strings and byte arrays to store into a db.I'm testing out encoding and decoding to see if I can get back the original string:
SecureRandom srand = new SecureRandom(); byte[] randomSalt = new byte[64]; srand.nextBytes(randomSalt); System.out.println("rand salt bytes: " + randomSalt); // first line String salt = Base64.encode(randomSalt); try { System.out.println(Base64.decode(salt)); // second line }catch(Base64DecodingException e){ System.out.println(e); }However, this prints out:
rand salt bytes: [B@68286c59[B@44d01f20Why are these not the same, so that I can get back the original byte array?
- Decoding base64 string doesn't work in JS, works with Linux' base64
I have a Playready DRM manifest and am extracting the base64 encoded header from it, this part works fine.
However, when I try to decode the string in Javascript (client-side) via either
atobor one of the other copy-paste implementations provided around here, there's a blank missing-character square between each expected character.If I pipe the encoded string into
base64 --decodein a terminal, I get the expected output.Base64 encoded string:
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base64 -decodeoutput:��<WRMHEADER xmlns="http://schemas.microsoft.com/DRM/2007/03/PlayReadyHeader" version="4.0.0.0"><DATA><PROTECTINFO><KEYLEN>16</KEYLEN><ALGID>AESCTR</ALGID></PROTECTINFO><KID>1itH2Ri0skW/V7ugYh/4hg==</KID><CHECKSUM>hu6NSdg4X2U=</CHECKSUM><LA_URL>https://lic.staging.drmtoday.com/license-proxy-headerauth/drmtoday/RightsManager.asmx</LA_URL></DATA></WRMHEADER>Javascript output:
҂����Ȃ<�W�R�M�H�E�A�D�E�R� �x�m�l�n�s�=�"�h�t�t�p�:�/�/�s�c�h�e�m�a�s�.�m�i�c�r�o�s�o�f�t�.�c�o�m�/�D�R�M�/�2�0�0�7�/�0�3�/�P�l�a�y�R�e�a�d�y�H�e�a�d�e�r�"� �v�e�r�s�i�o�n�=�"�4�.�0�.�0�.�0�"�>�<�D�A�T�A�>�<�P�R�O�T�E�C�T�I�N�F�O�>�<�K�E�Y�L�E�N�>�1�6�<�/�K�E�Y�L�E�N�>�<�A�L�G�I�D�>�A�E�S�C�T�R�<�/�A�L�G�I�D�>�<�/�P�R�O�T�E�C�T�I�N�F�O�>�<�K�I�D�>�1�i�t�H�2�R�i�0�s�k�W�/�V�7�u�g�Y�h�/�4�h�g�=�=�<�/�K�I�D�>�<�C�H�E�C�K�S�U�M�>�h�u�6�N�S�d�g�4�X�2�U�=�<�/�C�H�E�C�K�S�U�M�>�<�L�A�_�U�R�L�>�h�t�t�p�s�:�/�/�l�i�c�.�s�t�a�g�i�n�g�.�d�r�m�t�o�d�a�y�.�c�o�m�/�l�i�c�e�n�s�e�-�p�r�o�x�y�-�h�e�a�d�e�r�a�u�t�h�/�d�r�m�t�o�d�a�y�/�R�i�g�h�t�s�M�a�n�a�g�e�r�.�a�s�m�x�<�/�L�A�_�U�R�L�>�<�/�D�A�T�A�>�<�/�W�R�M�H�E�A�D�E�R�>�Does anyone know why this is happening or how to combat this? I assume it's the character set, but trying others yields similar results.
EDIT
SO has displayed the Javascript output string properly (i.e. How it should be in my program) so perhaps I'm not escaping it properly or something? Here's how the editor showed it to me when I pasted it in the first time:
EDIT 2After the first edit, SO is now showing the wierd characters again...
- python base64 to hex
Since two weeks, I'm trying and reading to solve this problem, but everything I tried didn't worked :-(
I'm using python 2.7.
I do have, as far as I understand, a base64-string from the format:
AAMkADk0ZjU4ODc1LTY1MzAtNDdhZS04NGU5LTAwYjE2Mzg5NDA1ZABGAAAAAAAZS9Y2rt6uTJgnyUZSiNf0BwC6iam6EuExS4FgbbOF87exAAAAdGVuAAC6iam6EuExS4FgbbOF87exAAAxj5dhAAA=I want to convert it to a hex-string. Which should result in
00000000194BD636AEDEAE4C9827C9465288D7F40700BA89A9BA12E1314B81606DB385F3B7B100000074656E0000BA89A9BA12E1314B81606DB385F3B7B10000318F97610000I tried it with the following code:
def itemid_to_entryid(itemid): decoded_val = base64.b64decode(itemid) decoded_val = ''.join( ["%02X" % ord(x) for x in decoded_val ] ).strip() decoded_val = decoded_val.upper() return decoded_valitemid = 'AAMkADk0ZjU4ODc1LTY1MzAtNDdhZS04NGU5LTAwYjE2Mzg5NDA1ZABGAAAAAAAZS9Y2rt6uTJgnyUZSiNf0BwC6iam6EuExS4FgbbOF87exAAAAdGVuAAC6iam6EuExS4FgbbOF87exAAAxj5dhAAA='entryid = itemid_to_entryid(itemid)print(entryid)which always returns me the following:
0003240039346635383837352D363533302D343761652D383465392D30306231363338393430356400460000000000194BD636AEDEAE4C9827C9465288D7F40700BA89A9BA12E1314B81606DB385F3B7B100000074656E0000BA89A9BA12E1314B81606DB385F3B7B10000318F97610000and I really don't get, what I'm doing wrong and really would appreciate any help in understanding what I'm doing wrong.
Kind regardsBen
- Nodejs Expressjs Base64 encode/decode missing r char
I have a problem with Base64 encoding/decoding. I have google chrome extension which scraps some simple data from opened web page like title, URL, image and then I am doing encoding of all these data and sending them to my nodejs app route.
The problem happens when some time in node router Base64 decode removes 'r' char from web page URL.
Here is my code in chrome extension which doing a encoding:
var Base64={_keyStr:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+=",encode:function(e){var t="";var n,r,i,s,o,u,a;var f=0;e=Base64._utf8_encode(e);while(f<e.length){n=e.charCodeAt(f++);r=e.charCodeAt(f++);i=e.charCodeAt(f++);s=n>>2;o=(n&3)<<4|r>>4;u=(r&15)<<2|i>>6;a=i&63;if(isNaN(r)){u=a=64}else if(isNaN(i)){a=64}t=t+this._keyStr.charAt(s)+this._keyStr.charAt(o)+this._keyStr.charAt(u)+this._keyStr.charAt(a)}return t},decode:function(e){var t="";var n,r,i;var s,o,u,a;var f=0;e=e.replace(/[^A-Za-z0-9+/=]/g,"");while(f<e.length){s=this._keyStr.indexOf(e.charAt(f++));o=this._keyStr.indexOf(e.charAt(f++));u=this._keyStr.indexOf(e.charAt(f++));a=this._keyStr.indexOf(e.charAt(f++));n=s<<2|o>>4;r=(o&15)<<4|u>>2;i=(u&3)<<6|a;t=t+String.fromCharCode(n);if(u!=64){t=t+String.fromCharCode(r)}if(a!=64){t=t+String.fromCharCode(i)}}t=Base64._utf8_decode(t);return t},_utf8_encode:function(e){e=e.replace(/rn/g,"n");var t="";for(var n=0;n<e.length;n++){var r=e.charCodeAt(n);if(r<128){t+=String.fromCharCode(r)}else if(r>127&&r<2048){t+=String.fromCharCode(r>>6|192);t+=String.fromCharCode(r&63|128)}else{t+=String.fromCharCode(r>>12|224);t+=String.fromCharCode(r>>6&63|128);t+=String.fromCharCode(r&63|128)}}return t},_utf8_decode:function(e){var t="";var n=0;var r=c1=c2=0;while(n<e.length){r=e.charCodeAt(n);if(r<128){t+=String.fromCharCode(r);n++}else if(r>191&&r<224){c2=e.charCodeAt(n+1);t+=String.fromCharCode((r&31)<<6|c2&63);n+=2}else{c2=e.charCodeAt(n+1);c3=e.charCodeAt(n+2);t+=String.fromCharCode((r&15)<<12|(c2&63)<<6|c3&63);n+=3}}return t}}var posturl1 = Base64.encode(posturl);And this is my code in Nodejs router which doing Base64 decoding:
var Base64={_keyStr:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+=",encode:function(e){var t="";var n,r,i,s,o,u,a;var f=0;e=Base64._utf8_encode(e);while(f<e.length){n=e.charCodeAt(f++);r=e.charCodeAt(f++);i=e.charCodeAt(f++);s=n>>2;o=(n&3)<<4|r>>4;u=(r&15)<<2|i>>6;a=i&63;if(isNaN(r)){u=a=64}else if(isNaN(i)){a=64}t=t+this._keyStr.charAt(s)+this._keyStr.charAt(o)+this._keyStr.charAt(u)+this._keyStr.charAt(a)}return t},decode:function(e){var t="";var n,r,i;var s,o,u,a;var f=0;e=e.replace(/[^A-Za-z0-9+/=]/g,"");while(f<e.length){s=this._keyStr.indexOf(e.charAt(f++));o=this._keyStr.indexOf(e.charAt(f++));u=this._keyStr.indexOf(e.charAt(f++));a=this._keyStr.indexOf(e.charAt(f++));n=s<<2|o>>4;r=(o&15)<<4|u>>2;i=(u&3)<<6|a;t=t+String.fromCharCode(n);if(u!=64){t=t+String.fromCharCode(r)}if(a!=64){t=t+String.fromCharCode(i)}}t=Base64._utf8_decode(t);return t},_utf8_encode:function(e){e=e.replace(/rn/g,"n");var t="";for(var n=0;n<e.length;n++){var r=e.charCodeAt(n);if(r<128){t+=String.fromCharCode(r)}else if(r>127&&r<2048){t+=String.fromCharCode(r>>6|192);t+=String.fromCharCode(r&63|128)}else{t+=String.fromCharCode(r>>12|224);t+=String.fromCharCode(r>>6&63|128);t+=String.fromCharCode(r&63|128)}}return t},_utf8_decode:function(e){var t="";var n=0;var r=c1=c2=0;while(n<e.length){r=e.charCodeAt(n);if(r<128){t+=String.fromCharCode(r);n++}else if(r>191&&r<224){c2=e.charCodeAt(n+1);t+=String.fromCharCode((r&31)<<6|c2&63);n+=2}else{c2=e.charCodeAt(n+1);c3=e.charCodeAt(n+2);t+=String.fromCharCode((r&15)<<12|(c2&63)<<6|c3&63);n+=3}}return t}} var url = Base64.decode(decodedurl);This is a sample of a problem:I am encoding this url and some other data (title, imagepath from page and url) http://www.c-sharpcorner.com/article/angularjs-2-0-from-beginning-introduction-of-angular-js-2-0/
This is result of encoding an nodejs router: http://www.c-sharpconer.com/article/angularjs-2-0-from-beginning-introduction-of-angular-js-2-0/
Decoded url missing 'r' charachter in domain name c-sharpconer shuld be c-sharpcoRner
- Android : Encoding pdf to base64 & decoding back to pdf gives "This document cannot be opened"
I am trying to first select pdf file, then encode it to base64 and save it to shared preference. After that, decode and save to pdf. And open that pdf to view.
When opening it displays message "This document cannot be opened". It looks like there was some problem on encoding/decoding part. I don't know where. So, if anyone has idea on it, It would be great help for me. Thanks,
My code is as follows:
Encoding :
public static String getBase64Pdf(String pdfFilePath){ try{ InputStream inputStream = new FileInputStream(pdfFilePath); byte[] byteArray = IOUtils.toByteArray(inputStream); String encodedPdfString = Base64.encodeToString(byteArray, Base64.DEFAULT); PrintLog.showTag(TAG,"pdf converted to string : " + encodedPdfString); return encodedPdfString; }catch (IOException e){ } return "";}Decoding, saving to file and open pdf :
private void openPdfViewer(){ try{ PrintLog.showTag(TAG,"== opnPdfViewer & length of base64 string is ==" + sessionManager.getBase64ProofImage().length()); //== decode and write file here String base64pdf = sessionManager.getBase64ProofImage();//gets base64 from shared preference final File newFilePath = new File(getActivity().getFilesDir(), "warrantyProof.pdf"); byte[] pdfAsBytes = Base64.decode(base64pdf, Base64.NO_WRAP); FileOutputStream os; os = new FileOutputStream(newFilePath, false); os.write(pdfAsBytes); os.flush(); os.close(); //==== open pdf file here File file = new File(getActivity().getFilesDir(),"warrantyProof.pdf"); Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(file), "application/pdf"); intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY); startActivity(intent); }catch (IOException e){ PrintLog.showException(TAG,"IO exception saving pdf ",e); } catch (Exception e){ PrintLog.showException(TAG,"exception opening pdf",e); }}