![]() |
Chilkat HOME Android™ AutoIt C C# C++ Chilkat2-Python CkPython Classic ASP DataFlex Delphi DLL Go Java Node.js Objective-C PHP Extension Perl PowerBuilder PowerShell PureBasic Ruby SQL Server Swift Tcl Unicode C Unicode C++ VB.NET VBScript Visual Basic 6.0 Visual FoxPro Xojo Plugin
(Objective-C) PBKDF2 - Derive Key from PasswordDemonstrates how to derive a symmetric encryption key from a password using PBKDF2. For more information, see https://www.chilkatsoft.com/key_derivation_pbkdf2.asp
#import <CkoCrypt2.h> #import <NSString.h> // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkoCrypt2 *crypt = [[CkoCrypt2 alloc] init]; NSString *pw = @"password"; NSString *pwCharset = @"utf-8"; // Such as sha256, sha512 NSString *hashAlg = @"sha256"; // 16 bytes NSString *saltHex = @"78578E5A5D63CB0668AB39B21C8637FA"; int iterationCount = 100000; // Derive a 256-bit key from the password. int outputBitLen = 256; // The derived key is returned as a hex or base64 encoded string. // (Note: The salt argument must be a string that also uses // the same encoding.) NSString *enc = @"hex"; NSString *hexKey = [crypt Pbkdf2: pw charset: pwCharset hashAlg: hashAlg salt: saltHex iterationCount: [NSNumber numberWithInt: iterationCount] outputKeyBitLen: [NSNumber numberWithInt: outputBitLen] encoding: enc]; NSLog(@"%@",hexKey); // Sample output: // AE96E261E32792D0FD6F0E72F8E872D046F7DB4C1FA7C83892EC73C49F461B70 |
© 2000-2025 Chilkat Software, Inc. All Rights Reserved.