Announcing gmStudio V9.85 for VB6/ASP/COM re-engineering

Great Migrations has released gmStudio V9.85. gmStudio is a programmable VB6/ASP/COM re-engineering tool that enables an agile tool-assisted rewrite methodology and helps teams dramatically lower the total cost, risk, and disruption of ambitious migration projects without sacrificing quality, control, or time to market. Figure 1: the gmStudio Main Form The hallmark characteristics of gmStudio include…

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ClickOnce and Security

ClickOnce deployment is another area where Code Access Security needs to be kept in mind. ClickOnce deployments will often be used to deploy Visual Basic .NET (or hybrid Interop Toolkit) applications from a website or network file share. In these cases, the applications don’t get the standard Full Trust permissions in CAS. Instead they get…

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Introducing code obfuscation

If you recall from an earlier post, I said that the main reason for signing an assembly and giving it a strong name was to prevent it being tampered with. For example, many of the assemblies that make up the .NET framework itself are strong-named assemblies that sit in the GAC. If I disassembled one…

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Code Access Security in action – calling Unmanaged Code

The following is an example of how code access security might affect your code when calling unmanaged code. Unmanaged code is a posh way of saying “It isn’t .NET code, it is the stuff you used to write before .NET” 🙂 In VB6 making a call to a Windows API function wasn’t affected by any…

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Authenticode and ActiveX controls

For VB6 developers, one area where asymmetric keys and digital signatures cropped up was the requirement to sign downloadable ActiveX controls using Authenticode. The idea was to sign the controls using a digital signature so that the origin of the control could always be established. There are a couple of related concepts in .NET that…

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Cryptography

The second big security area in the .NET framework after Authentication and Authorisation is cryptography. Again, the framework contains a lot of powerful functionality, and again there is an application block that makes it all a bit easier to use. The classes and namespaces that deal with cryptography cover three key areas: Symmetric Key Encryption/Decryption…

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Authentication and Authorisation

As promised, the first in a series of posts about security relevant to a developer new to .NET (such as a VB6 developer). These are what most people will immediately think of when security is discussed. Authentication This is proving your identity by some means, whether it’s knowing your password, having the right swipe card…

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Virtualization and Visual Basic 6.0 applications

There may be some circumstances where upgrading a VB6 application is not feasible, for example it may rely on a control that simply does not work in the target operating system. I came across a couple of articles on MSDN that discussed the ways that virtualisation technologies can be applied to this problem. There are…

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Aberdeen Group report on Migrating from VB6 to .NET

Aberdeen Group have created a new report “Migrating from VB6 to .NET: The challenge of software agility in a volatile economy” Some bits that stood out for me: 50% will migrate all the applications, 36% will migrate some (86% in total will migrate) “Best in class” understand the importance of external migration services and tools…

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Visual Basic 6.0 Migration – due diligence is a good thing

Choice in general is a good thing. When faced with moving a Visual Basic 6.0 application to .NET there is plenty of choices to be made. One of those choices is “Which tool should I go with to migrate the code?”. My advice in general is “Try as many as you can on a representative…

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