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(Unicode C) Decrypt2Demonstrates how to decrypt MIME using a certificate and private key where the certificate and its corresponding private key are stored in separate files -- a .cer for the certificate, and a .pem for the private key.
#include <C_CkMimeW.h> #include <C_CkCertW.h> #include <C_CkPrivateKeyW.h> void ChilkatSample(void) { HCkMimeW mime; HCkCertW cert; BOOL success; HCkPrivateKeyW privKey; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. mime = CkMimeW_Create(); // Load the certificate from a .cer file. cert = CkCertW_Create(); success = CkCertW_LoadFromFile(cert,L"aaworkarea/myCert.cer"); if (success == FALSE) { wprintf(L"%s\n",CkCertW_lastErrorText(cert)); CkMimeW_Dispose(mime); CkCertW_Dispose(cert); return; } // Load the private key from an encrypted PEM file. // (A private key can be loaded from other file formats also..) privKey = CkPrivateKeyW_Create(); success = CkPrivateKeyW_LoadEncryptedPemFile(privKey,L"aaworkarea/myPrivateKey.pem",L"myPassword"); if (success == FALSE) { wprintf(L"%s\n",CkPrivateKeyW_lastErrorText(privKey)); CkMimeW_Dispose(mime); CkCertW_Dispose(cert); CkPrivateKeyW_Dispose(privKey); return; } success = CkMimeW_LoadMimeFile(mime,L"aaworkarea/encryptedMime.txt"); if (success == FALSE) { wprintf(L"%s\n",CkMimeW_lastErrorText(mime)); CkMimeW_Dispose(mime); CkCertW_Dispose(cert); CkPrivateKeyW_Dispose(privKey); return; } // Decrypt using the cert and associated private key success = CkMimeW_Decrypt2(mime,cert,privKey); if (success == FALSE) { wprintf(L"%s\n",CkMimeW_lastErrorText(mime)); CkMimeW_Dispose(mime); CkCertW_Dispose(cert); CkPrivateKeyW_Dispose(privKey); return; } // Save the S/MIME to a file. success = CkMimeW_SaveMime(mime,L"aaworkarea/decryptedMime.txt"); if (success == FALSE) { wprintf(L"%s\n",CkMimeW_lastErrorText(mime)); CkMimeW_Dispose(mime); CkCertW_Dispose(cert); CkPrivateKeyW_Dispose(privKey); return; } wprintf(L"success!\n"); CkMimeW_Dispose(mime); CkCertW_Dispose(cert); CkPrivateKeyW_Dispose(privKey); } |
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