Use parseInt() to convert (which just accepts your hex string): parseInt(a); Then use a mask to figure out if the MSB is set: a & 0x8000 If that returns a nonzero value, you know it is negative. To wrap it all up: a = “0xffeb”; a = parseInt(a, 16); if ((a & 0x8000) > 0) … Read more
I guess what you say is you know the key pair before hand and want to sign/verify with that. Please see the following code. import java.security.KeyPair; import java.security.KeyPairGenerator; import java.security.NoSuchAlgorithmException; import java.security.Signature; import sun.misc.BASE64Encoder; public class MainClass { public static void main(String[] args) throws Exception { KeyPair keyPair = getKeyPair(); byte[] data = “test”.getBytes(“UTF8”); Signature … Read more
Nested frameworks are not supported on iOS (see technotes). The only legit solution at the moment is to link “embedded” frameworks directly to a hosting app. *XCFramework is mainly an aggregation of platform specific binaries and has nothing to do with embedding frameworks unfortunately.
This approach works fine for us (iTextSharp 5.3.3). We use smart-card and USB-token (vendor – www.author.kiev.ua): X509Store store = new X509Store(StoreLocation.CurrentUser); store.Open(OpenFlags.ReadOnly); X509Certificate2Collection sel = X509Certificate2UI.SelectFromCollection(store.Certificates, null, null, X509SelectionFlag.SingleSelection); X509Certificate2 cert = sel[0]; Org.BouncyCastle.X509.X509CertificateParser cp = new Org.BouncyCastle.X509.X509CertificateParser(); Org.BouncyCastle.X509.X509Certificate[] chain = new Org.BouncyCastle.X509.X509Certificate[] { cp.ReadCertificate(cert.RawData)}; IExternalSignature externalSignature = new X509Certificate2Signature(cert, “SHA-1”); PdfReader pdfReader = new … Read more
Assuming you want to check if a file is Authenticode signed and that the certificate is trusted you can pinvoke to WinVerifyTrust in Wintrust.dll. Below is a wrapper (more or less reproduced from here) that can be called as follows: AuthenticodeTools.IsTrusted(@”path\to\some\signed\file.exe”) Where AuthenticodeTools is defined as follows: internal static class AuthenticodeTools { [DllImport(“Wintrust.dll”, PreserveSig = … Read more
You can try osslsigncode To sign an EXE or MSI file you can now do: osslsigncode sign -certs <cert-file> -key <der-key-file> \ -n “Your Application” -i http://www.yourwebsite.com/ \ -in yourapp.exe -out yourapp-signed.exe or if you are using a PEM or PVK key file with a password together with a PEM certificate: osslsigncode sign -certs <cert-file> … Read more
More elegant version of fast solution: var sign = number?number<0?-1:1:0
The https://jwt.io debugger works in both directions, you can inspect and verify tokens or create and sign tokens. When you first paste your token on the left side and then paste the secret or key into the field under ‘verify signature’ in the right column, the signature will be recreated and you should notice that … Read more
The OP wants to attach an in-document signature visualization to an existing signature. First of all, this obviously is not allowed if your documents has been certified with no changes allowed Quite surprisingly, though, it does seem to be allowed for signed but uncertified documents (which the sample file is which I worked with). Indeed, … Read more
The problem is that whatever url you are currently hosting your app is not setup in your Application configuration. Go to your app settings and ensure the urls are matching. Updated Steps: Go to ‘Basic’ settings for your app Select ‘Add Platform’ Select ‘Website’ Put your website URL under ‘Site URL’