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Dynamics 365 Community / Forums / Finance | Project Operations, Human Resources, ... / Warning BP Rule::BPDep...
Finance | Project Operations, Human Resources, ...
Answered

Warning BP Rule::BPDeprecatedClassMethod: WinAPIServer::cryptUnProtectData has been deprecated and should not be used.

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Posted on by junior AX 1,552

Hi,

So i have this code on a certain table, to put a password field.

    /// 
    ///
    /// 
    public void insert()
    {
        Global::handleEncryptedTablePreInsert(this);
        super();
        Global::handleEncryptedTablePostInsert(this);
    }

    /// 
    ///
    /// 
    public void update()
    {
        Global::handleEncryptedTablePreUpdate(this);
        super();
        Global::handleEncryptedTablePostUpdate(this);
    }

    /// 
    ///
    /// 
    public edit Password passwordEdit(boolean _set, Password value)
    {
        if(_set)
        {
            this.ClientSecret = WinAPIServer::cryptProtectData(str2cryptoblob(value));
        }
        if(this.ClientSecret != conNull())
        {
            if(_set)
            {
                value = strRFix(value, strLen(value), 'X');
            }
            else 
            {
                value = 'XXXXXXXXX';
            }
        }
        return value;
    }

and in a certain class, i'm trying to get the password value by doing this

Password clientSecret  = cryptoblob2str(WinAPIServer::cryptUnProtectData(table.ClientSecret));

so i'm getting this BP warning on this line of code above?

what should i do? how to solve it?

Also i think after solving it i will get an error on the table method where i used cryptProtectData in the password edit method as shown above.

so how to solve it for both?

I have the same question (0)
  • Blue Wang Profile Picture
    Blue Wang on at

    Hi Junior,

    Please check this:https://docs.microsoft.com/en-us/dynamics365/fin-ops-core/dev-itpro/migration-upgrade/deprecated-apis

    55855.PNG

  • junior AX Profile Picture
    junior AX 1,552 on at

    Hi Blue Wang,

    i just saw this. I'm not really familiar alot with .Net

    can you help me with what to replace cryptProtect and and cryptUnprotect?

  • Verified answer
    Martin Dráb Profile Picture
    Martin Dráb 237,965 Most Valuable Professional on at

    You should use editEncryptedStringField() instead.

    For example, look at CatExternalCatalogProperties.editCatPropertyName().

  • junior AX Profile Picture
    junior AX 1,552 on at

    Hi Martin,

    your example confused me a little because it seems, it depends on two fields name and value. while i only want to encypt the clientSecret field.

    unless i should replace propertyName with clientId field and replace value field with clientSecret.

    So should my method be like this:

        edit EncryptedString editClientSecret(boolean _set, EncryptedString _clientSecret)
    {
        return Global::editEncryptedStringField(this, _clientSecret, fieldNum(table, ClientSecret), _set);
    }

    or like this:

    edit ClientId editClientSecret(boolean _set, ClientId _clientId)
    {
        return Global::editEncryptedStringField(this, _clientId, fieldNum(table, ClientSecret), _set);
    }

    For now i chose the first option

    2. my clientSecret field was a container with EDT encryptedField. So i changed that to string with EDT encryptedString

    3. Also on the form i used dataMethod password edit. I changed this to editClientSecret

    4. i left what i put on insert and update as is [related to Global::handleEncryptedTablePreInsert(this); and Global::handleEncryptedTablePostInsert(this);

    But what i got is a big string field with not encrypted value, i want it to look like a password. What did i do wrong?

  • Martin Dráb Profile Picture
    Martin Dráb 237,965 Most Valuable Professional on at

    What do you mean by "it depends on two fields name and value"?

    Let me explain the example:

    edit CatPropertyName editCatPropertyName(boolean _set, CatPropertyName _propertyName)
{
	return Global::editEncryptedStringField(this, _propertyName, fieldNum(CatExternalCatalogProperties, Value), _set);
}

    • _set says whether the edit method is setting a value or just retrieving it
    • if _set is true, _property is used to pass the new value (which is human-readable, i.e. unencrypted)
    • this is the table buffer you're getting the value from or setting to
    • and fieldNum(CatExternalCatalogProperties, Value) says which field is used for storing encrypted values

    Regarding your problem, did you try to debug your code? What did you find?

  • junior AX Profile Picture
    junior AX 1,552 on at

    Hi Martin,

    Thanks

    When i debug i can see the the fieldNum is encrypted but the return value is the actual string(Ex: Hi , and not an encyrpted value). I want to see it as dots like password.

        edit EncryptedString editClientSecret(boolean _set, EncryptedString _clientSecret)
    {
        return Global::editEncryptedStringField(this, _clientSecret, fieldNum(table, ClientSecret), _set);
    }

  • Suggested answer
    Martin Dráb Profile Picture
    Martin Dráb 237,965 Most Valuable Professional on at

    The purpose of this method is displaying human-readable values in GUI and store them encrypted in database.

    If your goal isn't displaying the value, simply don't do it. Return '*****', for example, instead of the value.

  • junior AX Profile Picture
    junior AX 1,552 on at

    Hi Martin,

    But i want it to be password so that i can see the value the first time (the eye next to the password).

    can't i keep using it?  without Winapiserver?

    Also how to decrypt. the BP warning was on this

    Password clientSecret  = cryptoblob2str(WinAPIServer::cryptUnProtectData(table.ClientSecret));

  • Martin Dráb Profile Picture
    Martin Dráb 237,965 Most Valuable Professional on at

    Using a different encryption algorithm doesn't change your GUI design. That's a completely different problem.

    I believe we've resolved the topic of this thread and you should know now how to replace cryptUnProtectData() (which resolves BPDeprecatedClassMethod).

  • junior AX Profile Picture
    junior AX 1,552 on at

    Hi Martin,

    I was getting the BP warning on this:

    Password clientSecret  = cryptoblob2str(WinAPIServer::cryptUnProtectData(table.ClientSecret));

    I thought what you suggested below was for cryptProtectData (related to my edit password method) not UnProtect

    are you saying that i should use this

    Global::editEncryptedStringField(this, _clientSecret, fieldNum(table, ClientSecret)

    instead of

    cryptoblob2str(WinAPIServer::cryptUnProtectData(table.ClientSecret));

    and not instead my passwordEdit method?

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