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
(Unicode C++) About RSA Public/Private KeysThis example provides some additional information for understanding public/private key pairs. In demonstrates how a private key is a superset of the public key. A public key contains the modulus and exponent. The matching private key also contains the modulus and exponent, but also contains the additional private key parts.
#include <CkCertW.h> #include <CkPublicKeyW.h> #include <CkPrivateKeyW.h> void ChilkatSample(void) { CkCertW cert; bool success; // Load a digital certificate. success = cert.LoadFromFile(L"digitalCert.cer"); if (success != true) { wprintf(L"%s\n",cert.lastErrorText()); return; } CkPublicKeyW *pubKey = 0; // A .cer file does not contain the private key. It should contain // the public key... pubKey = cert.ExportPublicKey(); // Let's have a look at it (in XML format). wprintf(L"Public Key from Certificate:\n"); wprintf(L"%s\n",pubKey->getXml()); // An RSA public key consists of a modulus and exponent. // An RSA private key includes both the modulus and exponent, // as well as other "big" numbers: P, Q, D, etc. // Let's load an RSA private key from a DER-encoded file: CkPrivateKeyW privKey; success = privKey.LoadAnyFormatFile(L"PrivateKey.key",L""); if (success != true) { wprintf(L"%s\n",privKey.lastErrorText()); delete pubKey; return; } // If this private key is the matching half to the public key from // the certificate, then the modulus and exponent should // be identical. (Thus, a "private key" really contains both the public part as well as the private parts...). wprintf(L"Private Key from DER:\n"); wprintf(L"%s\n",privKey.getXml()); delete pubKey; } |
© 2000-2025 Chilkat Software, Inc. All Rights Reserved.