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(Unicode C++) Duplicate openssl dgst -sha256 -sign private.pem -out sha256.sig in.datDemonstrates how to duplicate this OpenSSL command: openssl dgst -sha256 -sign private.pem -out sha256.sig in.datThe in.dat file can contain text or binary data of any type. The OpenSSL command does the following:
#include <CkPrivateKeyW.h> #include <CkByteData.h> #include <CkRsaW.h> void ChilkatSample(void) { // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. bool success; CkPrivateKeyW pkey; // Load the private key from an PEM file: success = pkey.LoadPemFile(L"private.pem"); if (success != true) { wprintf(L"%s\n",pkey.lastErrorText()); return; } // Load the file to be signed. CkByteData inData; success = inData.loadFile(L"in.dat"); if (success != true) { wprintf(L"Failed to load input data.\n"); return; } CkRsaW rsa; // Import the private key into the RSA component: success = rsa.ImportPrivateKeyObj(pkey); if (success != true) { wprintf(L"%s\n",rsa.lastErrorText()); return; } // OpenSSL uses big-endian... rsa.put_LittleEndian(false); CkByteData sigData; success = rsa.SignBytes(inData,L"sha256",sigData); if (success != true) { wprintf(L"%s\n",rsa.lastErrorText()); return; } // Save the binary signature to a file. success = sigData.saveFile(L"signature.sig"); if (success != true) { wprintf(L"Failed to save signature file.\n"); return; } wprintf(L"Success.\n"); } |
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