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(C# UWP/WinRT) 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:
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. bool success; Chilkat.PrivateKey pkey = new Chilkat.PrivateKey(); // Load the private key from an PEM file: success = pkey.LoadPemFile("private.pem"); if (success != true) { Debug.WriteLine(pkey.LastErrorText); return; } // Load the file to be signed. Chilkat.FileAccess fac = new Chilkat.FileAccess(); byte[] inData = fac.ReadEntireFile("in.dat"); Chilkat.Rsa rsa = new Chilkat.Rsa(); // Import the private key into the RSA component: success = rsa.ImportPrivateKeyObj(pkey); if (success != true) { Debug.WriteLine(rsa.LastErrorText); return; } // OpenSSL uses big-endian. rsa.LittleEndian = false; byte[] sigBytes = rsa.SignBytes(inData,"sha256"); if (rsa.LastMethodSuccess != true) { Debug.WriteLine(rsa.LastErrorText); return; } // Save the binary signature to a file. success = fac.WriteEntireFile("signature.sig",sigBytes); if (success != true) { Debug.WriteLine(fac.LastErrorText); return; } Debug.WriteLine("Success."); |
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