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Swift 3/4 Examples

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(Swift 3/4) PBKDF1 - Derive Key from Password

Demonstrates how to derive a symmetric encryption key from a password using PBKDF1. This example matches the results found at this URL: http://www.di-mgt.com.au/cryptoKDFs.html#examplespbkdf

It also matches the output produced by the .NET Framework using this C# code:

            byte[] salt = new byte[] { 0x78, 0x57, 0x8E, 0x5A, 0x5D, 0x63, 0xCB, 0x06 };
            PasswordDeriveBytes cdk = new PasswordDeriveBytes("password", salt);

            cdk.IterationCount = 1000;
            cdk.HashName = "SHA1";

            // generate a 16-byte key
            byte[] key = cdk.GetBytes(16);

Chilkat Downloads for the Swift Programming Language

MAC OS X (Cocoa) Objective-C/Swift Libs

iOS Objective-C/Swift Libs

func chilkatTest() {
    let crypt = CkoCrypt2()!

    var success: Bool = crypt.unlockComponent("Anything for 30-day trial")
    if success != true {
        print("\(crypt.lastErrorText!)")
        return
    }

    var hexKey: String?
    //  http://www.di-mgt.com.au/cryptoKDFs.html#examplespbkdf

    var pw: String? = "password"
    var pwCharset: String? = "ansi"
    //  Hash algorithms may be: sha1, md2, md5, etc.
    var hashAlg: String? = "sha1"
    //  The salt should be 8 bytes:
    var saltHex: String? = "78578E5A5D63CB06"
    var iterationCount: Int = 1000
    //  Derive a 128-bit key from the password.
    var outputBitLen: Int = 128

    //  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.)
    var enc: String? = "hex"

    hexKey = crypt.pbkdf1(pw, charset: pwCharset, hashAlg: hashAlg, salt: saltHex, iterationCount: iterationCount, outputKeyBitLen: outputBitLen, encoding: enc)

    print("\(hexKey!!)")

    //  The output should have this value:
    //  DC19847E05C64D2FAF10EBFB4A3D2A20

}

 

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