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Most of the real encryption work is done in the EncryptByteArray function. This function is responsible for using a ICryptoTransform object to create an encrypted byte array. EncryptByteArray accepts four parameters: the byte array to encode, the algorithm type, the encryption key, and the initialization vector. The key and IV parameters are both passed by reference because they could be populated with data. The function begins by acquiring a transformer object using the GetCryptoTransfomer function. Because the objective of the function is to encrypt a byte array, the direction parameter of the GetCryptoTransformer call is set to Encrypt. EncryptByteArray then creates a new memory stream named buffer. This memory stream stores the encrypted byte array as it is being written. The function also declares a CryptoStream named encStream under the buffer variable. Notice that encStream stream is passed to both the buffer and the transformer object. When you pass the data into the encStream, it uses the transformer object to encrypt the incoming data, and then stores the encrypted data in the underlying buffer. So the encrypted data ends up in the buffer byte array. Inside of the Try..Catch block, EncryptByteArray calls encStream.Write and passes in the byte array that should be encrypted, the position at which writing should start, and the number of bytes to write (it always writes the entire array). Inside the Write function, the byte array to be encrypted passes through the transformer object. The transformer object uses the key and initialization vector to encrypt the incoming data, and writes it out to buffer. Flush FinalBlock() ensures that any remaining data in encStream is written to the buffer. EncryptByteArray then closes encStream and returns the encrypted byte array stored in the buffer variable. rdlc ean 13 EAN - 13 Client Report RDLC Generator | Using free sample for EAN ...
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Features: - Linear, Postal, MICR & 2D Barcode Symbologies - Crystal Reports for .NET / ReportViewer RDLC support - Save barcode images in image files ... Listing 3-13 describes the SQL statement to create a table named LOGGING_DATA to store logging information. Listing 3-13. SQL Statement for Creating the LOGGING_DATA Table CREATE TABLE LOGGING_DATA ("USER_ID" VARCHAR2(10) NOT NULL, "DATE" VARCHAR2(10) NOT NULL, "LOGGER" VARCHAR2(50) NOT NULL, "LEVEL" VARCHAR2(10) NOT NULL, "MESSAGE" VARCHAR2(1000) NOT NULL) Decrypting a string is the reverse of encrypting a string. Instead of starting with a string and ending up with an encrypted base64 string, it takes an encrypted base64 string and ends up with a decrypted string. You can also see that it uses the DecryptByteArray function to do the heavy decryption work. Tip It would be helpful to import the project source (ch02.Project) into your workspace to go along with this chapter. rdlc ean 13 Packages matching RDLC - NuGet Gallery
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R2 is the same value as X. Thus, the outcome of a sequence of two XORs using the same value produces the original value. To see this feature of the XOR in ... DecryptByteArray is identical to the EncryptByteArray function except for the CryptoDirection parameter of the GetCryptoTransformer function call. It passes in Decrypt as the direction instead of Encrypt. This acquires a decryption transformer instead of an encryption transformer. Inside the Write method of the encStream, the encrypted byte array passes through the decryption transformer, which writes the decrypted byte array to the buffer variable. The function then returns the decrypted byte array stored in buffer. rdlc ean 13 RDLC EAN 13 Creator generate EAN 13(UCC-13 ... - Avapose.com
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Barcode Generator for .NET RDLC Reports, integrating bar coding features into . NET RDLC Reports project. Free to download evaluation package. To use the encryption library, add a reference for the EncryptionLibrary assembly to your project. Place an imports statement for the EncryptionLIbrary at the top of the page in which you want to use the library, or include a global imports statement for the library in your project. All the methods in the Encryption class are shared, so you don t need to instantiate an object to use them. Listing 12-17 shows an example of how to get a base64 key and initialization vector from Web.config, convert them into byte arrays, and use them to encrypt and decrypt a string. Listing 12-17. Encryption and Decryption Example Imports EncryptionLibrary Imports System.Configuration.ConfigurationManager ... 'Acquire Base64 strings from Web.config Dim keyBase64 As String = AppSettings("TripleDESKey") Dim IVBase64 As String = AppSettings("TripleDESIV") 'Convert to byte arrays Dim key As Byte() = Convert.FromBase64String(keyBase64) Dim IV As Byte() = Convert.FromBase64String(IVBase64) Dim TextToEncrypt As String = "Please encrypt this text" Dim EncryptedText As String = Encryption.EncryptString(TextToEncrypt, _ Encryption.EncryptionAlgorithmType.TripleDES, key, IV) Dim DecryptedText As String = Encryption.DecryptString(EncryptedText, _ Encryption.EncryptionAlgorithmType.TripleDES, key, IV) If DecryptedText = TextToEncrypt Then Success = True This is a fairly straightforward example. First, it acquires the base64 string version of the key and initialization vectors from Web.config and stores them in two variables. It then converts those base64 keys back into their native Byte array format and declares text to encrypt. Next, it encrypts the text using the TripleDES algorithm with the key and IV acquired from Web.config and stores the text in the EncryptedText variable. It then decrypts the EncryptedText variable using the same algorithm, key, and initialization vector. Lastly, it Listing 3-14, jdbc.properties, describes the configuration file we will be using to log messages to a database table. Listing 3-14. Sample JDBCAppender Configuration Properties Style #configuring the custom logger log4j.logger.com.apress.logging.log4j=DEBUG,DB log4j.appender.DB=org.apache.log4j.jdbc.JDBCAppender log4j.appender.DB.URL=jdbc:odbc:dbdef log4j.appender.DB.user=system log4j.appender.DB.password=manager log4j.appender.DB.sql=INSERT INTO LOGGING_DATA VALUES('%x','%d{yyyy-MMdd}','%C','%p','%m') The following Java files describe the project: ch02.project.MainActivity.java: This file is created by the wizard and should already exist in the project. jni.Natives.java: This is a new file that contains native methods to be invoked within the native library and callbacks that the C library will perform within Java. rdlc ean 13 RDLC Report Barcode - Reporting Definition Language Client-Side
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