TripleDESCryptoServiceProvider in C++ using OpenSSl

[Coder5546]

Hello, I have a problem with TripleDESCryptoServiceProvider function. I need it to ensure backward compatibility in our app.
The general problem is that 3DES decoder doesn't work properly. If You have any suggestions how to fix my problem please answer

Best regards.

C# code:

CryptoStream cryptoStream = new CryptoStream(memoryStream, new TripleDESCryptoServiceProvider
    {
        Key = passwordDeriveBytes.GetBytes(24),
        IV = passwordDeriveBytes.GetBytes(8)
    }.CreateDecryptor(), CryptoStreamMode.Read);
    StreamReader streamReader = new StreamReader(cryptoStream);
    string result = streamReader.ReadToEnd();
    memoryStream.Close();
    cryptoStream.Close();
    return result

CryptoStream cryptoStream = new CryptoStream(memoryStream, new TripleDESCryptoServiceProvider
    {
        Key = passwordDeriveBytes.GetBytes(24),
        IV = passwordDeriveBytes.GetBytes(8)
    }.CreateDecryptor(), CryptoStreamMode.Read);
    StreamReader streamReader = new StreamReader(cryptoStream);
    string result = streamReader.ReadToEnd();
    memoryStream.Close();
    cryptoStream.Close();
    return result

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QT/C++ Code:

byte *key = passwordDeriveBytes.GetBytes(24); // returns same value as c# function
    byte *iv = passwordDeriveBytes.GetBytes(8); // returns  same value as c# function
 
    DES_key_schedule ks1, ks2;
    QByteArray code1 = QByteArray::fromHex(code.toUtf8());
    code1 = QByteArray::fromBase64(code1);
 
    /*
    QString string1 = "";
    for(int i = 0; i < 24; i++){
        string1.append(QString::number(key[i], 16) + "-");
    }
    QString string2 = "";
    for(int i = 0; i < 8; i++){
      string2.append(QString::number(iv[i], 16) + "-");
    }
    */
 
//////////////////////////// something is wrong /////////////////////////////////////////////////
    byte *output = new byte[code1.size()];
 
    DES_set_key((C_Block *)key, &ks1);
    DES_set_key((C_Block *)iv, &ks2);
 
    DES_ecb2_encrypt((C_Block *)code1.constData(),(C_Block *)output, &ks1, &ks2, DES_DECRYPT);
    QString rval = QByteArray::fromRawData((char *)output, code1.size());
    return rval;

byte *key = passwordDeriveBytes.GetBytes(24); // returns same value as c# function
    byte *iv = passwordDeriveBytes.GetBytes(8); // returns  same value as c# function

    DES_key_schedule ks1, ks2;
    QByteArray code1 = QByteArray::fromHex(code.toUtf8());
    code1 = QByteArray::fromBase64(code1);

    /*
    QString string1 = "";
    for(int i = 0; i < 24; i++){
        string1.append(QString::number(key[i], 16) + "-");
    }
    QString string2 = "";
    for(int i = 0; i < 8; i++){
      string2.append(QString::number(iv[i], 16) + "-");
    }
    */

//////////////////////////// something is wrong /////////////////////////////////////////////////
    byte *output = new byte[code1.size()];

    DES_set_key((C_Block *)key, &ks1);
    DES_set_key((C_Block *)iv, &ks2);

    DES_ecb2_encrypt((C_Block *)code1.constData(),(C_Block *)output, &ks1, &ks2, DES_DECRYPT);
    QString rval = QByteArray::fromRawData((char *)output, code1.size());
    return rval;

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[Coder5546]

Come on..., no one wants to help me?

[wysota]

What is the question?

[Coder5546]

Sorry, I should precise my problem.
Why my C++ code doesn't work properly ? Is any difference between OpenSSL and Microsoft 3DES ?
I did something wrong ? I don't have enough experience with C#

I think that something is wrong in this code:

byte *output = new byte[code1.size()];
DES_set_key((C_Block *)key, &ks1);
DES_set_key((C_Block *)iv, &ks2);
 
DES_ecb2_encrypt((C_Block *)code1.constData(),(C_Block *)output, &ks1, &ks2, DES_DECRYPT);
QString rval = QByteArray::fromRawData((char *)output, code1.size());
return rval;

byte *output = new byte[code1.size()];
DES_set_key((C_Block *)key, &ks1);
DES_set_key((C_Block *)iv, &ks2);
 
DES_ecb2_encrypt((C_Block *)code1.constData(),(C_Block *)output, &ks1, &ks2, DES_DECRYPT);
QString rval = QByteArray::fromRawData((char *)output, code1.size());
return rval;

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Just I want to rewrite this code from c# to c++/qt using OpenSSL

CryptoStream cryptoStream = new CryptoStream(memoryStream, new TripleDESCryptoServiceProvider
    {
    Key = passwordDeriveBytes.GetBytes(24),
    IV = passwordDeriveBytes.GetBytes(8)
    }.CreateDecryptor(), CryptoStreamMode.Read);
    StreamReader streamReader = new StreamReader(cryptoStream);
    string result = streamReader.ReadToEnd();
    memoryStream.Close();
    cryptoStream.Close();
    return result

CryptoStream cryptoStream = new CryptoStream(memoryStream, new TripleDESCryptoServiceProvider
    {
    Key = passwordDeriveBytes.GetBytes(24),
    IV = passwordDeriveBytes.GetBytes(8)
    }.CreateDecryptor(), CryptoStreamMode.Read);
    StreamReader streamReader = new StreamReader(cryptoStream);
    string result = streamReader.ReadToEnd();
    memoryStream.Close();
    cryptoStream.Close();
    return result

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My C++ passwordDeriveBytes.GetBytes working well
This page may be usefull: http://msdn.microsoft.com/en-us/libr...vs.110%29.aspx

Thank You for any help

[rmp]

Hi,
Were you able to solve this finally? I am facing the same issue and am stuck.