Search This Blog

2008-03-19

Encryption , Decryption in

/*
* Author : Nidheesh T.Mani
* Version : 1.0
*/

using System;
using System.Security.Cryptography;
namespace Utils
{
///
/// This class provide static methods for encryption and decryption.
///

public class DataEncryption
{
///
/// Method which does the encryption using Rijndeal algorithm
///

/// Data to be encrypted
/// The string to used for making the key.The same string
/// should be used for making the decrpt key
/// Encrypted Data
public static string EncryptString ( string InputText, string Password )
{
RijndaelManaged RijndaelCipher = new RijndaelManaged ( );

byte [ ] PlainText = System.Text.Encoding.Unicode.GetBytes ( InputText );
byte [ ] Salt = System.Text.Encoding.ASCII.GetBytes ( Password.Length.ToString ( ) );

//This class uses an extension of the PBKDF1 algorithm defined in the PKCS#5 v2.0
//standard to derive bytes suitable for use as key material from a password.
//The standard is documented in IETF RRC 2898.

PasswordDeriveBytes SecretKey = new PasswordDeriveBytes ( Password, Salt );
//Creates a symmetric encryptor object.
ICryptoTransform Encryptor = RijndaelCipher.CreateEncryptor ( SecretKey.GetBytes ( 32 ), SecretKey.GetBytes ( 16 ) );
System.IO.MemoryStream memoryStream = new System.IO.MemoryStream ( );
//Defines a stream that links data streams to cryptographic transformations
CryptoStream cryptoStream = new CryptoStream ( memoryStream, Encryptor, CryptoStreamMode.Write );
cryptoStream.Write ( PlainText, 0, PlainText.Length );
//Writes the final state and clears the buffer
cryptoStream.FlushFinalBlock ( );
byte [ ] CipherBytes = memoryStream.ToArray ( );
memoryStream.Close ( );
cryptoStream.Close ( );
string EncryptedData = Convert.ToBase64String ( CipherBytes );
return EncryptedData;

} //eof private static string EncryptString ( string InputText, string Password )

///
/// Method which does the encryption using Rijndeal algorithm.This is for decrypting the data
/// which has orginally being encrypted using the above method
///

/// The encrypted data which has to be decrypted
/// The string which has been used for encrypting.The same string
/// should be used for making the decrypt key
/// Decrypted Data
public static string DecryptString ( string InputText, string Password )
{

RijndaelManaged RijndaelCipher = new RijndaelManaged ( );
byte [ ] EncryptedData = Convert.FromBase64String ( InputText );
byte [ ] Salt = System.Text.Encoding.ASCII.GetBytes ( Password.Length.ToString ( ) );
//Making of the key for decryption
PasswordDeriveBytes SecretKey = new PasswordDeriveBytes ( Password, Salt );
//Creates a symmetric Rijndael decryptor object.
ICryptoTransform Decryptor = RijndaelCipher.CreateDecryptor ( SecretKey.GetBytes ( 32 ), SecretKey.GetBytes ( 16 ) );
System.IO.MemoryStream memoryStream = new System.IO.MemoryStream ( EncryptedData );
//Defines the cryptographics stream for decryption.THe stream contains decrpted data
CryptoStream cryptoStream = new CryptoStream ( memoryStream, Decryptor, CryptoStreamMode.Read );
byte [ ] PlainText = new byte [ EncryptedData.Length ];
int DecryptedCount = cryptoStream.Read ( PlainText, 0, PlainText.Length );
memoryStream.Close ( );
cryptoStream.Close ( );
//Converting to string
string DecryptedData = System.Text.Encoding.Unicode.GetString ( PlainText, 0, DecryptedCount );
return DecryptedData;

} //eof private static string DecryptString (string InputText , string Password )

} //eof class

} //eof namespace Utils

No comments:

Post a Comment

- the first minus - Comments have to be moderated because of the spammers
- the second minus - I am very lazy at moderating comments ... hardly find time ...
- the third minus - Short links are no good for security ...
- The REAL PLUS : Any critic and positive feedback is better than none, so your comments will be published sooner or later !!!!

Labels

perl (41) Cheat Sheet (25) how-to (24) windows (14) sql server 2008 (13) linux (12) oracle (12) sql (12) Unix (11) cmd windows batch (10) mssql (10) cmd (9) script (9) textpad (9) netezza (8) sql server 2005 (8) cygwin (7) meta data mssql (7) metadata (7) bash (6) code generation (6) Informatica (5) cheatsheet (5) energy (5) tsql (5) utilities (5) excel (4) future (4) generic (4) git cheat sheet (4) html (4) perl modules (4) programs (4) settings (4) sh (4) shortcuts (4) поуки (4) принципи (4) Focus Fusion (3) Solaris (3) cool programs (3) development (3) economy (3) example (3) freeware (3) fusion (3) logging (3) morphus (3) mssql 2005 (3) nuclear (3) nz (3) parse (3) python (3) sftp (3) sofware development (3) source (3) sqlplus (3) table (3) vim (3) .Net (2) C# (2) China (2) GUI (2) Google (2) GoogleCL (2) Solaris Unix (2) architecture (2) ascii (2) awk (2) batch (2) cas (2) chrome extensions (2) code2html (2) columns (2) configuration (2) conversion (2) duplicates (2) excel shortcuts (2) export (2) file (2) free programs (2) informatica sql repository (2) linux cheat sheet (2) mssql 2008 (2) mysql (2) next big future (2) nsis (2) nz netezza cheat sheet (2) nzsql (2) ora (2) prediction (2) publish (2) release management (2) report (2) security (2) single-click (2) sqlserver 2005 (2) sqlserver 2008 (2) src (2) ssh (2) template (2) tools (2) vba (2) video (2) xlt (2) xml (2) youtube videos (2) *nix (1) .vimrc (1) .virmrc vim settings configs (1) BSD license (1) Bulgaria (1) Dallas (1) Database role (1) Dense plasma focus (1) Deployment (1) ERP (1) ExcelToHtml (1) GD (1) GDP (1) HP-UX (1) Hosting (1) IDEA (1) INC (1) IT general (1) ITIL management bullshit-management (1) IZarc (1) Java Web Start (1) JavaScript anchor html jquery (1) Khan Academy (1) LINUX UNIX BASH AND CYGWIN TIPS AND TRICKS (1) Linux Unix rpm cpio build install configure (1) Linux git source build .configure make (1) ListBox (1) MIT HYDROGEN VIRUS (1) OO (1) Obama (1) PowerShell (1) Run-time (1) SDL (1) SIWA (1) SOX (1) Scala (1) Services (1) Stacks (1) SubSonic (1) TED (1) abstractions (1) ansible hosts linux bash (1) ansible linux deployment how-to (1) ansible yum pip python (1) apache (1) apache 2.2 (1) application life cycle (1) architecture input output (1) archive (1) arguments (1) avatar (1) aws cheat sheet cli (1) aws cli (1) aws cli amazon cheat sheet (1) aws elb (1) backup (1) bash Linux open-ssh ssh ssh_server ssh_client public-private key authentication (1) bash perl search and replace (1) bash stub (1) bin (1) biofuels (1) biology (1) books (1) browser (1) bubblesort (1) bugs (1) build (1) byte (1) cas_sql_dev (1) chennai (1) chrome (1) class (1) claut (1) cmdow (1) code generation sqlserver (1) command (1) command line (1) conf (1) confluence (1) console (1) convert (1) cool programs windows free freeware (1) copy paste (1) copy-paste (1) csv (1) ctags (1) current local time (1) cygwin X11 port-forwarding mintty xclock Linux Unix X (1) cygwin bash how-to tips_n_tricks (1) cygwin conf how-to (1) data (1) data types (1) db2 cheat sheet (1) db2 starter ibm bash Linux (1) debt (1) diagram (1) dictionaries (1) digital (1) disk (1) disk space (1) documentation (1) dos (1) dubai (1) e-cars (1) electric cars (1) electricity (1) emulate (1) errors (1) exponents (1) export workflow (1) extract (1) fast export (1) fexp (1) file extension (1) file permissions (1) findtag (1) firewall (1) for loop (1) freaky (1) functions (1) fusion research (1) german (1) git gitlab issues handling system (1) google cli (1) google code (1) google command line interface (1) gpg (1) ha (1) head (1) helsinki (1) history (1) hop or flop (1) host-independant (1) how-to Windows cmd time date datetime (1) ibm db2 cognos installation example db deployment provisioning (1) ideas (1) image (1) informatica oracle sql (1) informatica repo sql workflows sessions file source dir (1) informatica source files etl (1) install (1) isg-pub issue-tracker architecture (1) it management best practices (1) java (1) jump to (1) keyboard shortcuts (1) ksh (1) level (1) linkedin (1) linux bash ansible hosts (1) linux bash commands (1) linux bash how-to shell expansion (1) linux bash shell grep xargs (1) linux bash tips and t ricks (1) linux bash unix cygwin cheatsheet (1) linux bash user accounts password (1) linux bash xargs space (1) linux cheat-sheet (1) linux cheatsheet cheat-sheet revised how-to (1) linux how-to non-root vim (1) linux ssh hosts parallel subshell bash oneliner (1) london (1) make (1) me (1) metacolumn (1) metadata functions (1) metaphonre (1) method (1) model (1) movie (1) multithreaded (1) mysql cheat sheet (1) mysql how-to table datatypes (1) n900 (1) nano (1) neteza (1) netezza bash linux nps (1) netezza nps (1) netezza nps nzsql (1) netezza nz Linux bash (1) netezza nz bash linux (1) netezza nz nzsql sql (1) netezza nzsql database db sizes (1) non-password (1) nord pol (1) nps backup nzsql schema (1) number formatting (1) nz db size (1) nz table count rows (1) nzsql date timestamp compare bigint to_date to_char now (1) on-lier (1) one-liners (1) one-to-many (1) oneliners (1) open (1) open source (1) openrowset (1) openssl (1) oracle PL/SQL (1) oracle Perl perl (1) oracle installation usability (1) oracle number formatting format-model ora-sql oracle (1) oracle templates create table (1) oracle trigger generic autoincrement (1) oracle vbox virtual box cheat sheet (1) oracle virtual box cheat sheet (1) outlook (1) parser (1) password (1) paths (1) perl @INC compile-time run-time (1) perl disk usage administration Linux Unix (1) perl modules configuration management (1) permissions (1) php (1) picasa (1) platform (1) postgreSQL how-to (1) powerShell cmd cygwin mintty.exe terminal (1) ppm (1) predictions (1) prices (1) principles (1) productivity (1) project (1) prompt (1) proxy account (1) public private key (1) publishing (1) putty (1) qt (1) read file (1) registry (1) relationship (1) repository (1) rm (1) scala ScalaFmt (1) scp (1) scripts (1) scsi (1) search and replace (1) sed (1) sendEmail (1) sh stub (1) shortcuts Windows sql developer Oracle (1) sidebar (1) silicon (1) smells (1) smtp (1) software development (1) software procurement (1) sofware (1) sort (1) sql script (1) sql_dev (1) sqlcmd (1) sqlite (1) sqlite3 (1) sshd (1) sshd cygwin (1) stackoverflow (1) stored procedure (1) stub (1) stupidity (1) subroutines (1) svn (1) sysinternals (1) system design (1) tail (1) tar (1) temp table (1) templates (1) teradata (1) terminal (1) test (1) testing (1) theory (1) thorium (1) time (1) tip (1) title (1) tmux .tmux.conf configuration (1) tmux efficiency bash (1) tool (1) ui code prototyping tips and tricks (1) umask Linux Unix bash file permissions chmod (1) url (1) urls (1) user (1) utility (1) utils (1) vb (1) vbox virtual box cheat sheet (1) vim perl regex bash search for string (1) vim recursively hacks (1) vim starter (1) vim-cheat-sheet vim cheat-sheet (1) vimeo (1) visual stuio (1) warsaw (1) wiki (1) wikipedia (1) window (1) windows 7 (1) windows 8 (1) windows programs (1) windows reinstall (1) windows utility batch perl space Windows::Clipboard (1) wisdoms (1) workflow (1) worth-reading (1) wrapper (1) xp_cmdshell (1) xslt (1) youtube (1)

Blog Archive

Translate with Google Translate

My Blog List