<PackageReference Include="BouncyCastle.Cryptography" Version="2.7.0" />

Org.BouncyCastle.Bcpg.FingerprintUtilities

public static class FingerprintUtilities
namespace Org.BouncyCastle.Bcpg { public static class FingerprintUtilities { public static long KeyIDFromFingerprint(int keyVersion, byte[] fingerprint); public static long KeyIDFromV6Fingerprint(byte[] v6Fingerprint); public static long KeyIDFromLibrePgpFingerprint(byte[] v5Fingerprint); public static long KeyIDFromV4Fingerprint(byte[] v4Fingerprint); public static long LongFromLeftMostBytes(byte[] bytes); public static long LongFromRightMostBytes(byte[] bytes); public static long ReadKeyID(byte[] bytes, int offset); public static void WriteKeyID(long keyID, byte[] bytes, int offset); } }