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GetECDsaPublicKey-correctly-handles-brainpool-curves.md

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GetECDsaPublicKey-correctly-handles-brainpool-curves.md

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ECDsaCertificateExtensions.GetECDsaPublicKey correctly handles Brainpool curves

Scope

Edge

Version Introduced

4.8

Source Analyzer Status

NotPlanned

Change Description

Starting with .NET Framework 4.8, the xref:System.Security.Cryptography.X509Certificates.ECDsaCertificateExtensions.GetECDsaPublicKey%2A?displayProperty=nameWithtype method correctly handles all named curves supported by the OS, including the Brainpool elliptic curves.

Recommended Action

If you encounter compatibility issues with this change on the .NET Framework 4.8 or a later version, you can opt-out of it by adding the following line to the <runtime> section of the app.config file:

<appSettings>
    <add key="Switch.System.Security.Cryptography.X509Certificates.ECDsaCertificateExtensions.UseLegacyPublicKeyReader" value="true" />
</appSettings>

Affected APIs

  • M:System.Security.Cryptography.X509Certificates.ECDsaCertificateExtensions.GetECDsaPublicKey(System.Security.Cryptography.X509Certificates.X509Certificate2)

Category

Security