Update README.md
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README.md
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README.md
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@ -240,6 +240,7 @@ To compute the private key, we will need to supply the tool with the public ECC
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The order of the base point can be computed using SageMath.
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**Here's the basic algorithm I used to reverse the Windows 98 private key:**
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1. Compute the order of the base point using **SageMath**. In SageMath, execute the following commands:
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1) `E = EllipticCurve(GF(p), [0, 0, 0, a, b])`, where `p`, `a` and `b` are decimally represented elliptic curve parameters from the BINK resource.
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2) `G = E(Gx, Gy)`, where `Gx` and `Gy` are decimally represented base point coordinates from the BINK resource.
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@ -254,7 +255,7 @@ The order of the base point can be computed using SageMath.
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3) Insert the factors of the base point order `n` and specify the factor count. It will very likely be `1`, as Microsoft mainly uses primes for their generator orders.
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4) Run the tool `<arch> ECDLP Solver.exe <job_name>.txt` and wait until it calculates the private key `k = %d` for you.
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Here's an example of the Windows XP job `job_xp.txt` that yields the correct private key for the ECDLP Solver.
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**Here's an example of the Windows XP job `job_xp.txt` that yields the correct private key for the ECDLP Solver.**
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```pascal
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GF := GF(22604814143135632990679956684344311209819952803216271952472204855524756275151440456421260165232069708317717961315241);
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@ -267,9 +268,15 @@ FactorCount:=1;
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*/
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```
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And the ECDLP Solver output for it:
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**And the ECDLP Solver output for it:**
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**Important note:**
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Be wary that I could not generate a correct Windows XP x64 key using the private key I've reversed, even using the `Ky` coordinate instead of usual `-Ky`.
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For some reason, I also failed to calculate the Windows Server 2003 base point order using SageMath. **I gave it 12 hours to compute on my i7-12700K, but it was still stuck calculating.**
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### Validating / generating product keys
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The rest of the job is done within the code of this keygen.
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