Does Microsoft Powershell Do ECDSA?
Overall, Microsoft has been a little sluggish in getting into elliptic curve cryptography (ECC), but now .NET and Powershell support it. In fact, Powershell is now supported on Linux, Mac OSX and Windows. Overall, we can run the pwsh command to run a Powershell script.
So, let’s see if we can create a signature that is used by Bitcoin and Ethereum: ECDSA (Elliptic Curve Digital Signature Algorithm). With ECDSA we use an elliptic curve to produce a digital signature. Overall, we take a hash of a message and then create a signature using a private key. The public key can then be used to verify the signature.
In this case, we will use a range of curves, such as 192-bit, 256-bit, 384-bit and 521-bit curves, and create with a range of hashing methods (such as MD5, SHA-1 and SHA-256). Common curve types include Brainpool, secp, and NIST. To set up a NIST P-256 curve, we create with:
$ecc = [System.Security.Cryptography.ECDsa]::Create([System.Security.Cryptography.ECCurve]::CreateFromFriendlyName(("nistp256")))We can then export the keys with:
$e=$ecc.ExportParameters($true)To select a SHA-1 hashing method for a word of “hello”:
$hash1=[System.Security.Cryptography.HashAlgorithm]::Create("sha1").ComputeHash([System.Text.Encoding]::UTF8…
