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(VB.NET) 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. Dim success As Boolean Dim pkey As New Chilkat.PrivateKey ' Load the private key from an PEM file: success = pkey.LoadPemFile("private.pem") If (success <> True) Then Debug.WriteLine(pkey.LastErrorText) Exit Sub End If ' Load the file to be signed. Dim fac As New Chilkat.FileAccess Dim inData() As Byte = fac.ReadEntireFile("in.dat") Dim rsa As New Chilkat.Rsa ' Import the private key into the RSA component: success = rsa.ImportPrivateKeyObj(pkey) If (success <> True) Then Debug.WriteLine(rsa.LastErrorText) Exit Sub End If ' OpenSSL uses big-endian. rsa.LittleEndian = False Dim sigBytes() As Byte = rsa.SignBytes(inData,"sha256") If (rsa.LastMethodSuccess <> True) Then Debug.WriteLine(rsa.LastErrorText) Exit Sub End If ' Save the binary signature to a file. success = fac.WriteEntireFile("signature.sig",sigBytes) If (success <> True) Then Debug.WriteLine(fac.LastErrorText) Exit Sub End If Debug.WriteLine("Success.") |
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