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The easiest way to encrypt data is through the CryptoStream class in the System.Security.Cryptography namespace. This class uses a SymmeticAlgorithm object to encrypt or decrypt streaming data and can be used in conjunction with other stream classes to write data in memory, to files, and to the network. When used with a MemoryStream class, CryptoStream can be used to encrypt data in memory, as demonstrated by Listing 37-3. To encrypt data in a file, replace MemoryStream with a FileStream object, and to encrypt data to be transmitted over a network, replace the MemoryStream with a stream object obtained from a network connection. See s 20 and 21 for examples. Listing 37-3. Encrypting Data in Memory Using MemoryStream using System; using System.IO; using System.Security.Cryptography; class Listing 03 { static void Main(string[] args) { // create a new SymmeticAlgoritm object SymmetricAlgorithm myAlgorithm = new AesManaged(); // read and print out the key and IV values Console.WriteLine("Key: {0}", Convert.ToBase64String(myAlgorithm.Key)); Console.WriteLine("IV: {0}", Convert.ToBase64String(myAlgorithm.IV)); // create a memory stream MemoryStream memStream = new MemoryStream(); // create a CryptoStream that uses the MemoryStream CryptoStream myCryptoStream = new CryptoStream(memStream, myAlgorithm.CreateEncryptor(), CryptoStreamMode.Write); // create a StreamWriter so we can work with strings and not bytes StreamWriter myStreamWriter = new StreamWriter(myCryptoStream); // write some secret data myStreamWriter.Write("The gold is hidden in the kitchen"); // close the writer and read the encrypted data from the memory stream myStreamWriter.Close(); byte[] encryptedData = memStream.ToArray(); // encode and print out the data Console.WriteLine("Data: {0}", Convert.ToBase64String(encryptedData)); // wait for input before exiting Console.WriteLine("Press enter to finish"); pdf417 decoder java open source tianhsky/driver_license_decoder: Java library to decode ... - GitHub
Java library to decode barcode string from driver's license - tianhsky/ driver_license_decoder. pdf417 javascript Linear Barcode, QR Code, DataMatrix and PDF417 API - Dynamsoft
Dynamsoft Barcode Reader JavaScript Edition is a JavaScript API for barcode scanning based on the WebAssembly technology. This demo supports scanning ... To have a scripting engine evaluate an expression, you would use one of the six versions of its eval() method, all of which can throw a ScriptException if there are errors in the script: public Object eval(String script) public Object eval(Reader reader) public Object eval(String script, ScriptContext context) public Object eval(Reader reader, ScriptContext context) public Object eval(String script, Bindings bindings) public Object eval(Reader reader, Bindings bindings) The script to evaluate can either be in the form of a String object or come from a Reader stream. The ScriptContext allows you to specify the scope of any Bindings objects, as well as get input, output, and error streams. There are two predefined context scopes: ScriptContext.GLOBAL_SCOPE and ScriptContext.ENGINE_SCOPE. The Bindings objects are just a mapping from a String name to a Java instance, with global scope meaning that names are shared across all engines. javascript pdf417 decoder Android Open Source - pdf417 -android Pdf417 Mobi Demo - Java2s
MalformedURLException; import java .net.URL; import java .util.ArrayList; import mobi. pdf417 .Pdf417MobiScanData; import mobi. pdf417 .Pdf417MobiSettings ... java pdf 417 pdf417 - npm search
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Copy BarcodeReader.jar to your Java project library folder. ... PDF417 );; Pass your PDF 417 barcode image file, and barcode type to BarcodeReader, and it will ... Console.ReadLine(); } } The CryptoStream class takes three constructor parameters. The first is the Stream that should be written to or read from. For this example, I have used a MemoryStream object, which stores data in memory. The second argument is an implementation of the ICryptoTransform interface. You can get the implementations you need by calling the CreateEncryptor and CreateDecryptor method on your SymmetricAlgorithm object. The final argument is a value from the CryptoStreamMode enumeration, which defines the values Read (used when decrypting data) and Write (used when encrypting data). The CryptoStream class works on byte values, so for convenience, I have created a StreamWriter that lets me write data to the stream using C# strings. I write a secret message to the StreamWriter using the Write method. This passes the byte data from my message to the CryptoStream class, which uses the SymmetricAlgorithm object to encrypt my data. The encrypted data is then written to the MemoryStream. I retrieve the encrypted data from the MemoryStream by calling the ToArray method and then encode the result using base 64 to make it easier to work with. Compiling and running Listing 37-3 produces the following results: Key: i9zrkg4sws97Xly/c4Cw9nPVf85s70A//ZpnWGGV5UM= IV: TlcaDtlqR+c3mLsDTtePmg== Data: FZQuZQNzBC58xNDKjZTXZrS7W8pMPzfmFmR3dzbv3voLI90t0dg/7Wo0VUmtFtIY Press enter to finish The results you see will be different because I am using a randomly generated key and IV. The encrypted data changes each time the key and IV change, meaning that all three values in the results will be different each time Listing 37-3 is run. The process of decrypting data is, as you might expect, the reverse of encryption. We need to know four things to decrypt data: the algorithm used to encrypt the data, the values of the key and IV, and the encrypted data. Listing 37-4 demonstrates how to decrypt the data we created in Listing 37-3. Listing 37-4. Decrypting Data using System; using System.IO; using System.Security.Cryptography; class Listing 04 { static void Main(string[] args) { // define the key, IV and data byte[] myKey = Convert.FromBase64String( "i9zrkg4sws97Xly/c4Cw9nPVf85s70A//ZpnWGGV5UM="); byte[] myIV = Convert.FromBase64String( "TlcaDtlqR+c3mLsDTtePmg=="); pdf417 java pkoretic/pdf417-generator: PDF417 HUB3 2D barcode ... - GitHub
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