How can I get an SHA-256 certificate thumbprint?

Question

How can I get the SHA-256 thumbprint of a certificate?

SHA-256 certificates have two thumbprint, and I am able to retrieve the primary thumbprint, but not SHA-256.

Answer 1

Use:

public static String GetSha2Thumbprint(X509Certificate2 cert)
{
    Byte[] hashBytes;
    using (var hasher = new SHA256Managed())
    {
        hashBytes = hasher.ComputeHash(cert.RawData);
    }
    string result = BitConverter.ToString(hashBytes)
        // This will remove all the dashes in between each two characters
    .Replace("-", string.Empty).ToLower();
    return result;
}

After getting the Hashbytes, you have to do the bit convertion.

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