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(C#) IKOF Generation Code for Montenegro Fiscalization Service

Demonstrates computing the IKOF MD5 summary value as described in section 4.3 of this document: https://poreskauprava.gov.me/ResourceManager/FileDownload.aspx?rId=416042&rType=2

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// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

string concatenatedParams = "12345678|2019-06-12T17:05:43+02:00|9952|bb123bb1231|cc123cc1231|ss123ss123|199.01";

// Get the private key from a pfx file.
Chilkat.Pfx pfx = new Chilkat.Pfx();
bool success = pfx.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123");
if (success != true) {
    Debug.WriteLine(pfx.LastErrorText);
    return;
}

Chilkat.PrivateKey privKey = pfx.GetPrivateKey(0);
if (pfx.LastMethodSuccess == false) {
    Debug.WriteLine(pfx.LastErrorText);
    return;
}

// Create IIC signature according to RSASSA-PKCS-v1_5 using SHA256
Chilkat.Rsa rsa = new Chilkat.Rsa();
success = rsa.ImportPrivateKeyObj(privKey);
if (success == false) {
    Debug.WriteLine(rsa.LastErrorText);
    return;
}

// PKCS-v1_5 is used by default.
rsa.EncodingMode = "hex";
rsa.Charset = "utf-8";
string hexSig = rsa.SignStringENC(concatenatedParams,"sha256");

Debug.WriteLine("Signature value result is: " + hexSig);

// Compute the MD5 hash of the bytes.
Chilkat.Crypt2 crypt = new Chilkat.Crypt2();
crypt.EncodingMode = "hex";
crypt.HashAlgorithm = "md5";
Chilkat.BinData bd = new Chilkat.BinData();
bd.AppendEncoded(hexSig,"hex");
string md5_summary = crypt.HashBdENC(bd);

Debug.WriteLine("MD5 summary value is: " + md5_summary);


 

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