.net – Automatically updating a file with Revision from TFS

Not sure if you are still looking for an answer but I just spent the better part of my weekend getting it to work, mostly through trial and error so here is what I learned.

You CANNOT download the zip files and get anything to work if you are using TFS-2010. Instead you MUST download the source code and compile the thing for yourself.

You have to do the build on a computer with IIS installed to use the website project as is. This is what I did rather than change the project to use the development web server.

If you don't have VS-2008 installed anymore you can just upgrade the whole solution to VS-2010 and everything will be fine. I even changed the target of the website project to the 4.0 Framework with minimal issues. I had to unload the TestsRequiredTfsClient project and the Tools.HttpSend project to get the rest of the projects to build.

After you have built the project you need to follow a couple of steps that are outlined on the SvnBidge home page in order to get the bits into the right location on the web server. Once that is complete then you need to tune up the web.config file.

Here are the appSettings that you need to change and the values you need to use:

<add key="LogPath" value="--directoryYouWantToKeepLogsIn--" />
<add key="DomainIncludesProjectName" value="False" />
<add key="TfsUrl" value="http://--tfsServerName--:8080/tfs/--projectCollection--" />
<add key="ReadAllUserDomain" value="--yourDomain--" />
<add key="ReadAllUserName" value="--domainUserName--" />
<add key="ReadAllUserPassword" value="--domainUserNamePassword--" />

If you decided to upgrade the website to the 4.0 Framework don't forget that you need to update the application pool to because it was probably created as 2.0.

After you are almost done now that the website is set up. You still need to install some performance counters from the SvnBridge.PerfCounter.Installer project. After complication just copy those bits over to the same server you just installed the website on and run the exe.

THIS DIDN'T WORK

Okay so last but not least is security. I don't use the Digest security because all of my users have a windows login so I left anonymous access enabled and then disabled all other forms of access except Windows Authentication.

Windows Authentication didn't work for all of the users, some of them were remote. After looking at the source code it became clear that Basic Authentication was the only choice that was going to work. I needed the users to log in as them selves and then have that username passed into TFS so that as the check-ins are done they can be recorded to the correct user.

RP

The Jacobian form of the projective coordinates (as any other form) is not unique - for every value of Z (other than 0) you get other X and Y without the actual point changing.

Thus, if you have a point in affine coordinates (X', Y'), the pair (X', Y', 1) is a projective representative of this point, as well as (4·X', 8·Y', 2), (9·X', 27·Y', 3), etc. The one with 1 is the easiest to create, so usually you would use this one.

While one can define (and study) elliptic curves over any field, and many mathematicians study curves defined over the complex numbers, for cryptographic uses, the coordinates are elements of some finite field. In the simplest case, we have a prime field (i.e. integers modulo a prime number), and you'll have to do addition, subtraction, multiplication and division (and probably exponentiation) in this field.

As long as Z is not zero, you should be able to divide by Z² - this is equivalent to multiplying by the inverse of Z², and such an element exists, and can be calculated efficiently using the extended euclidean algorithm.

This is easiest if your programming language comes with some big number library which has the necessary operations predefined, like Java's BigInteger class (with its mod, modPow and modInverse methods).

The field in question (i.e. the modulus) is part of the definition of the elliptic curve, and operations over one field give totally different results than operations in another one. So make sure you are using the right field.