![]() |
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
(PureBasic) RSA Encrypt and Decrypt StringsSee more RSA ExamplesPureBasic sample code to RSA public-key encrypt and decrypt strings using public and private keys.Note: This example requires Chilkat v11.0.0 or greater.
IncludeFile "CkPublicKey.pb" IncludeFile "CkPrivateKey.pb" IncludeFile "CkRsa.pb" Procedure ChilkatExample() success.i = 0 ; This example assumes the Chilkat API to have been previously unlocked. ; See Global Unlock Sample for sample code. rsa.i = CkRsa::ckCreate() If rsa.i = 0 Debug "Failed to create object." ProcedureReturn EndIf ; This example also generates the public and private ; keys to be used in the RSA encryption. ; Normally, you would generate a key pair once, ; and distribute the public key to your partner. ; Anything encrypted with the public key can be ; decrypted with the private key. The reverse is ; also true: anything encrypted using the private ; key can be decrypted using the public key. ; Generate a 2048-bit key. Chilkat RSA supports ; key sizes ranging from 512 bits to 4096 bits. privKey.i = CkPrivateKey::ckCreate() If privKey.i = 0 Debug "Failed to create object." ProcedureReturn EndIf success = CkRsa::ckGenKey(rsa,2048,privKey) If success = 0 Debug CkRsa::ckLastErrorText(rsa) CkRsa::ckDispose(rsa) CkPrivateKey::ckDispose(privKey) ProcedureReturn EndIf pubKey.i = CkPublicKey::ckCreate() If pubKey.i = 0 Debug "Failed to create object." ProcedureReturn EndIf CkPrivateKey::ckToPublicKey(privKey,pubKey) plainText.s = "Encrypting and decrypting should be easy!" ; Start with a new RSA object to demonstrate that all we ; need are the keys previously exported: rsaEncryptor.i = CkRsa::ckCreate() If rsaEncryptor.i = 0 Debug "Failed to create object." ProcedureReturn EndIf ; Encrypted output is always binary. In this case, we want ; to encode the encrypted bytes in a printable string. ; Our choices are "hex", "base64", "url", "quoted-printable". CkRsa::setCkEncodingMode(rsaEncryptor, "hex") ; We'll encrypt with the public key and decrypt with the private ; key. success = CkRsa::ckUsePublicKey(rsaEncryptor,pubKey) usePrivateKey.i = 0 encryptedStr.s = CkRsa::ckEncryptStringENC(rsaEncryptor,plainText,usePrivateKey) Debug encryptedStr ; Now decrypt: rsaDecryptor.i = CkRsa::ckCreate() If rsaDecryptor.i = 0 Debug "Failed to create object." ProcedureReturn EndIf CkRsa::setCkEncodingMode(rsaDecryptor, "hex") success = CkRsa::ckUsePrivateKey(rsaDecryptor,privKey) usePrivateKey = 1 decryptedStr.s = CkRsa::ckDecryptStringENC(rsaDecryptor,encryptedStr,usePrivateKey) Debug decryptedStr CkRsa::ckDispose(rsa) CkPrivateKey::ckDispose(privKey) CkPublicKey::ckDispose(pubKey) CkRsa::ckDispose(rsaEncryptor) CkRsa::ckDispose(rsaDecryptor) ProcedureReturn EndProcedure |
© 2000-2025 Chilkat Software, Inc. All Rights Reserved.