Chilkat HOME .NET Core C# Android™ AutoIt C C# C++ Chilkat2-Python CkPython Classic ASP DataFlex Delphi ActiveX Delphi DLL Go Java Lianja Mono C# Node.js Objective-C PHP ActiveX PHP Extension Perl PowerBuilder PowerShell PureBasic Ruby SQL Server Swift 2 Swift 3,4,5... Tcl Unicode C Unicode C++ VB.NET VBScript Visual Basic 6.0 Visual FoxPro Xojo Plugin
(Unicode C) RSAES-OAEP Encrypt String with AES-128 Content Encryption and SHA256Encrypts a string using RSAES-OAEP with SHA256 and AES-128 content encryption to produce PKCS7 output (base64 encoded). Note: This example requires Chilkat v9.5.0.67 or greater.
#include <C_CkStringBuilderW.h> #include <C_CkCertW.h> #include <C_CkCrypt2W.h> void ChilkatSample(void) { HCkStringBuilderW sb; int i; HCkCertW cert; BOOL success; HCkCrypt2W crypt; const wchar_t *base64Pkcs7; // This example requires the Chilkat Crypt API to have been previously unlocked. // See Unlock Chilkat Crypt for sample code. // First build a string to be encrypted sb = CkStringBuilderW_Create(); i = 1; while (i < 25) { CkStringBuilderW_AppendInt(sb,i); CkStringBuilderW_Append(sb,L" the quick brown fox jumped over the lazy dog.\r\n"); i = i + 1; } wprintf(L"%s\n",CkStringBuilderW_getAsString(sb)); // The string to be encrypted looks like this: // 1 the quick brown fox jumped over the lazy dog. // 2 the quick brown fox jumped over the lazy dog. // 3 the quick brown fox jumped over the lazy dog. // 4 the quick brown fox jumped over the lazy dog. // 5 the quick brown fox jumped over the lazy dog. // 6 the quick brown fox jumped over the lazy dog. // ... // Load a digital certificate. // We don't need the private key for encryption. // Only the public key is needed (which is included in a certificate). cert = CkCertW_Create(); success = CkCertW_LoadFromFile(cert,L"qa_data/rsaes-oaep/cert.pem"); if (success != TRUE) { wprintf(L"%s\n",CkCertW_lastErrorText(cert)); CkStringBuilderW_Dispose(sb); CkCertW_Dispose(cert); return; } crypt = CkCrypt2W_Create(); // Tell the crypt object to use the certificate. CkCrypt2W_SetEncryptCert(crypt,cert); // Indicate that we want PKI encryption (i.e. public-key infrastructure) // to produce a CMS message (Cryptographic Message Syntax/PKCS7), // that is be created with RSAES-OAEP padding, SHA256, and AES-128 for the // bulk encryption. CkCrypt2W_putCryptAlgorithm(crypt,L"pki"); CkCrypt2W_putPkcs7CryptAlg(crypt,L"aes"); CkCrypt2W_putKeyLength(crypt,128); CkCrypt2W_putOaepHash(crypt,L"sha256"); CkCrypt2W_putOaepPadding(crypt,TRUE); // Also, don't forget to be specific about the character encoding (byte representation) of the // string to be encrypted. CkCrypt2W_putCharset(crypt,L"utf-8"); // Now indicate that the PKCS7 output is to be returned in the base64 encoding. CkCrypt2W_putEncodingMode(crypt,L"base64"); base64Pkcs7 = CkCrypt2W_encryptStringENC(crypt,CkStringBuilderW_getAsString(sb)); if (CkCrypt2W_getLastMethodSuccess(crypt) != TRUE) { wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt)); CkStringBuilderW_Dispose(sb); CkCertW_Dispose(cert); CkCrypt2W_Dispose(crypt); return; } // Show the output wprintf(L"%s\n",base64Pkcs7); // This base64 can be copy-and-pasted into the form at http://lapo.it/asn1js/ // to verify that all the chosen algorithms were indeed used. wprintf(L"OK.\n"); CkStringBuilderW_Dispose(sb); CkCertW_Dispose(cert); CkCrypt2W_Dispose(crypt); } |
© 2000-2024 Chilkat Software, Inc. All Rights Reserved.