Generate Encrypted QR Code for Text

How to Generate Encrypted QR Code for Text?

To generate an encrypted QR Code for some text, please refer to the following steps:

1. Select the Type: Encrypted QR Code
2. Provide the following information in content section: Encrypted Text
   • Password (Key): enter your password that you want to used for encrypting the text message
   • Text: enter the short text message that you want to encrypt 
3. Customize QR Code Settings (Optional)
4. Click Generate Preview button

You will see the generated encrypted QR Code under the preview section.

Procedure

API

 GET /qrcodegen/api/qrcode/generate?data=<Short Message Text>&passKey=<Password>foreColor=&bgColor=&ecc=&size=&format=


API Example:

\------------

http://localhost:8080/qrcodegen/api/qrcode/generate?data=Aspose.BarCode&passKey=aspose&foreColor=&bgColor=&ecc=&size=&format=

Generated QR Code

Decryption Using OpenSSL

 [user@aspose]$ echo <encrypted_text> | openssl enc -aes-128-cbc -a -d


Example:

[user@aspose]$ echo "U2FsdGVkX1+ntJUYuMJKFAOrvreTSo/uvKSEnDUnw3c="|openssl enc -aes-128-cbc -a -d

enter aes-128-cbc decryption password: aspose

Aspose.BarCode

Java Script

The JS code sample to generate an encrypted QR Code from content input fields is provided below.

      if(page == 'encryption'){



     var passKey = this.$('.input-encryption-password').val();

   if (passKey == '' || passKey == null ) {

   console.log("Password is required");

   alert("Password is required");

   this.$('.qrcode-preview-processing').addClass('hide');

     this.$('.qrcode-preview-image').removeClass('hide');

   return false;

   }



     var requestString= this.$('.input-encryption-message').val();



     if (requestString == '' || requestString == null ) {

   console.log("Message Text is required");

   alert("Message Text is required");

   this.$('.qrcode-preview-processing').addClass('hide');

     this.$('.qrcode-preview-image').removeClass('hide');

   return false;

   }



     requestString = requestString + '&passKey=' + passKey;

     requestString = this.addRequestSettings(requestString);



     var that = this;



     this.$('.qrcode-preview-image').load(function(){

     that.$('.qrcode-preview-processing').addClass('hide');

     that.$('.qrcode-preview-image').removeClass('hide');

     })    

     .error(function(){

     that.$('.qrcode-preview-processing').attr('src', '/qrcodegen/resources/imgs/error.png');

     })

     .attr('src', '/qrcodegen/api/qrcode/generate?data='+ requestString);



     this.updateDownloadTag(requestString);

     }

Java

Core API Method - QRCodeManagementController.generateQRCode 

 @RequestMapping(value = "generate", method = RequestMethod.GET,

    		produces = {MediaType.IMAGE_JPEG_VALUE, MediaType.IMAGE_PNG_VALUE, MediaType.IMAGE_GIF_VALUE, MediaType_IMAGE_TIFF_VALUE, MediaType_IMAGE_BMP_VALUE})

    @ApiOperation(value = "Generate QR Code.")

    public ResponseEntity<byte[]>  generateQRCode(

    		@ApiParam( value = "data", name="data" , required = true)

    		@RequestParam("data") String data,

        HttpServletRequest request,HttpServletResponse response,

        @ApiParam( value = "A user-chosen password that can be used with password-based encryption (PBE) Algo PBEWITHMD5AND128BITAES-CBC-OPENSSL)", name="passKey", required=false) @RequestParam(required=false, value="passKey") String passKey,

        @ApiParam( value = "ForeColor e.g #000000 (Black - RGB(hex))", name="foreColor", required=false) @RequestParam(required=false, value="foreColor") String foreColor,

        @ApiParam( value = "BackgroundColor e.g #FFFFFF (White - RGB(hex))", name="bgColor", required=false) @RequestParam(required=false, value="bgColor") String bgColor,

        @ApiParam( value = "L|M|Q|H - Reed-Solomon error correctionCode Level(from low to high) default=Low", name="ecc", required=false) @RequestParam(required=false, value="ecc") String ecc,

        @ApiParam( value = "Image Size e.g #150x150", name="size", required=false) @RequestParam(required=false, value="size") String size,

        @ApiParam( value = "jpeg|tiff|gif|png|bmp - default=png", name="format", required=false) @RequestParam(required=false, value="format") String format,

        @ApiParam( value = "true|false default=false", name="download", required=false) @RequestParam(required=false, value="download") boolean download,

        @ApiIgnore @Value("#{request.getHeader('" +  ACCEPT_HEADER + "')}") String acceptHeaderValue) throws Exception {

Main encrypt Method - StringEncryptor.encrypt

 	public  static String encrypt(String Data, String password) throws Exception {

		Security.addProvider(new BouncyCastleProvider());

		Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");

		final Random r = new SecureRandom();

		byte[] salt = new byte[8];

		r.nextBytes(salt);

		SecretKeyFactory fact = SecretKeyFactory.getInstance("PBEWITHMD5AND128BITAES-CBC-OPENSSL", "BC");

		c.init(Cipher.ENCRYPT_MODE, fact.generateSecret(new PBEKeySpec(password.toCharArray(), salt, 100)));

		 	byte[] encVal = c.doFinal(Data.getBytes());

		 	ByteArrayOutputStream bos = new ByteArrayOutputStream();

		 	//writing encrypted data along with the salt in the format readable by open ssl api

		 	bos.write("Salted__".getBytes());

		 	bos.write(salt);

		 	bos.write(encVal);

		    String encryptedValue = new BASE64Encoder().encode(bos.toByteArray());

		    bos.close();

		    return encryptedValue;


	}