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263723: Added PEM certificate sample
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‎Digital Signature/Sign-PDF-with-PEM-Certificate/.NET/Sign-PDF-with-PEM-Certificate.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.14.36616.10 d17.14
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Sign-PDF-with-PEM-Certificate", "Sign-PDF-with-PEM-Certificate\Sign-PDF-with-PEM-Certificate.csproj", "{15D14533-D3DD-4F05-9652-4DF196C648E3}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{15D14533-D3DD-4F05-9652-4DF196C648E3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{15D14533-D3DD-4F05-9652-4DF196C648E3}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{15D14533-D3DD-4F05-9652-4DF196C648E3}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{15D14533-D3DD-4F05-9652-4DF196C648E3}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {6F0575C6-8A8D-414F-84C6-11C432B44578}
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EndGlobalSection
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EndGlobal

‎Digital Signature/Sign-PDF-with-PEM-Certificate/.NET/Sign-PDF-with-PEM-Certificate/Data/certificate.cer‎

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-----BEGIN CERTIFICATE-----
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MIIEIDCCA+CgAwIBAgIUd5tYHFakkBrSoRMsnF9bwlIdj7YwCQYHKoZIzjgEAzAjMSEwHwYDVQQD
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ExhUb2tlbiBTaWduaW5nIFB1YmxpYyBLZXkwHhcNMTcwNTExMDUxMjE4WhcNMTcwNTE4MDUxMjE4
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WjAtMSswKQYDVQQDHiIANQAxADUANQA4AGIANAAxAGQANwBhADgAYgAzADgANQAAMIGfMA0GCSqG
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SIb3DQEBAQUAA4GNADCBiQKBgQCreQXHLNcWSKp4pKYo0p8J/t77ZWGdJdlM1RxgrjPxnCpUtrhb
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2mqwha5fJ/sKRzU/dEUa5dPZCZWcT6sqX5/Hlrvm2/c5Ij59vohOxdwEhxuL1HMLjQdtz3hZTE91
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DD6/uu330xWUoEV9IobGitsrhRTykVVNnvA64I09lvnEuwIDAQABo4ICoDCCApwwDgYDVR0PAQH/
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BAQDAgWgMBMGA1UdJQQMMAoGCCsGAQUFBwMCMIIB/wYDVR0gBIIB9jCCAfIwggHuBgorBgEEAYI3
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MwMCMIIB3jCCAdoGCCsGAQUFBwICMIIBzB6CAcgATQBpAGMAcgBvAHMAbwBmAHQAIABkAG8AZQBz
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ACAAbgBvAHQAIAB3AGEAcgByAGEAbgB0ACAAbwByACAAYwBsAGEAaQBtACAAdABoAGEAdAAgAHQA
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aABlACAAaQBuAGYAbwByAG0AYQB0AGkAbwBuACAAZABpAHMAcABsAGEAeQBlAGQAIABpAG4AIAB0
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AGgAaQBzACAAYwBlAHIAdABpAGYAaQBjAGEAdABlACAAaQBzACAAYwB1AHIAcgBlAG4AdAAgAG8A
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cgAgAGEAYwBjAHUAcgBhAHQAZQAsACAAbgBvAHIAIABkAG8AZQBzACAAaQB0ACAAbQBhAGsAZQAg
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AGEAbgB5ACAAZgBvAHIAbQBhAGwAIABzAHQAYQB0AGUAbQBlAG4AdABzACAAYQBiAG8AdQB0ACAA
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dABoAGUAIABxAHUAYQBsAGkAdAB5ACAAbwByACAAcwBhAGYAZQB0AHkAIABvAGYAIABkAGEAdABh
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ACAAcwBpAGcAbgBlAGQAIAB3AGkAdABoACAAdABoAGUAIABjAG8AcgByAGUAcwBwAG8AbgBkAGkA
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bgBnACAAcAByAGkAdgBhAHQAZQAgAGsAZQB5AC4wUwYDVR0jBEwwSoAURtLCWz4DNCN5LhccABko
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THEQK2ShJ6QlMCMxITAfBgNVBAMTGFRva2VuIFNpZ25pbmcgUHVibGljIEtleYIJAL67zDTCqZpD
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MB0GA1UdDgQWBBR+L+E5CKYJmufz2XcGMOFu+hb3LjAJBgcqhkjOOAQDAy8AMCwCFErwQFvnFgVT
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Pcnh4wfjaGMjKStIAhQJ9ouuyB8Ot8+emod0q68bbGuEWg==
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-----END CERTIFICATE-----

‎Digital Signature/Sign-PDF-with-PEM-Certificate/.NET/Sign-PDF-with-PEM-Certificate/Data/logo.png‎

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‎Digital Signature/Sign-PDF-with-PEM-Certificate/.NET/Sign-PDF-with-PEM-Certificate/Data/privatekey.pem‎

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-----BEGIN RSA PRIVATE KEY-----
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MIICWwIBAAKBgQCreQXHLNcWSKp4pKYo0p8J/t77ZWGdJdlM1RxgrjPxnCpUtrhb
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2mqwha5fJ/sKRzU/dEUa5dPZCZWcT6sqX5/Hlrvm2/c5Ij59vohOxdwEhxuL1HML
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jQdtz3hZTE91DD6/uu330xWUoEV9IobGitsrhRTykVVNnvA64I09lvnEuwIDAQAB
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AoGAFVZfeNv5vdz3/ZWQ1Ev1R2ikSwiKv46J/kzB6xPyWcfoNUIcKdiW5cq/b+Qz
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5yEE8sBJ/cwIncgwClNC8OhqTiyBJjK1KdyfMkUgdBTtwTiHcPMyxy5XTXyiSnVO
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2ig91PxVu7B+gTjZYX0/Sv3KxiPmQvQ7KF/3iAoGDoQpwrkCQQDUYiKyqLuJyU3z
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G7MxCX3fxCAdUndtTXq5IRGklLtsuRFG2qvA3psgptDBnG+Damm1/5/YIV47lMe9
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ye6yiT75AkEAzrAMhb3+uCKEK0p//Ktdt0h5WF2uFf2KQ4ZmfRiAgl2KbpyXPZYC
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fc5t+WTs40D7W/A9NdUpc9yHqfN7WzGqUwJAVnUouOA1kA7R27CgDstVYZ1ekXE7
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ytQqrGiI3R3q+oSQQu7L0nUMY4tlGhwLzUypgfxw3rQev1R+x4UH1chHSQJAdJ3O
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IvPFMT2AVzCsr/I8aTpCBQKuQ4gPJ/RABVr6vxNqFOjTSJNICpWbZTh1k+9JI2GU
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F7iSr+WAwfo34odOMwJAJj9EibYjBlwrtIkv+cPSQ6OeBeZUrHCjOsnmS4z98Ju7
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mtYfb45W8VbAp5USJJP1t2jbywMutgDpsLw6wW/3jg==
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-----END RSA PRIVATE KEY-----

‎Digital Signature/Sign-PDF-with-PEM-Certificate/.NET/Sign-PDF-with-PEM-Certificate/Output/gitkeep.txt‎

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‎Digital Signature/Sign-PDF-with-PEM-Certificate/.NET/Sign-PDF-with-PEM-Certificate/Program.cs‎

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using Org.BouncyCastle.Asn1.Pkcs;
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using Org.BouncyCastle.Crypto;
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using Org.BouncyCastle.OpenSsl;
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using Org.BouncyCastle.Pkcs;
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using Org.BouncyCastle.Security;
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using Syncfusion.Drawing;
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using Syncfusion.Pdf;
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using Syncfusion.Pdf.Graphics;
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using Syncfusion.Pdf.Security;
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//Creates a new PDF document.
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using (PdfDocument document = new PdfDocument())
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{
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//Add a new page.
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PdfPageBase page = document.Pages.Add();
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PdfGraphics graphics = page.Graphics;
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//Get the certificate file.
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Org.BouncyCastle.X509.X509CertificateParser cp = new Org.BouncyCastle.X509.X509CertificateParser();
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Org.BouncyCastle.X509.X509Certificate cert = cp.ReadCertificate(File.ReadAllBytes(Path.GetFullPath(@"Data/certificate.cer")));
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//Read the PEM file.
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PemReader pmr = new PemReader(new StringReader(File.ReadAllText(Path.GetFullPath(@"Data/privateKey.pem"))));
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AsymmetricCipherKeyPair KeyPair = (AsymmetricCipherKeyPair)pmr.ReadObject();
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//Get the PFX file stream.
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Stream pfxFile = CreatePfxFile(cert, KeyPair.Private);
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//Creates a certificate instance from the PFX file with a private key.
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PdfCertificate pdfCert = new PdfCertificate(pfxFile, "syncfusion");
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//Creates a digital signature.
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PdfSignature signature = new PdfSignature(document, page, pdfCert, "Signature");
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//Sets the signature information.
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signature.Bounds = new RectangleF(new PointF(0, 0), new SizeF(300, 100));
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signature.ContactInfo = "[email protected]";
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signature.LocationInfo = "Honolulu, Hawaii";
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signature.Reason = "I am author of this document.";
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FileStream imageStream = new FileStream(Path.GetFullPath(@"Data/Logo.png"), FileMode.Open, FileAccess.Read);
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//Load an image file.
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PdfBitmap image = new PdfBitmap(imageStream);
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//Draw an image in the signature appearance.
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signature.Appearance.Normal.Graphics.DrawImage(image, new RectangleF(0, 0, 300, 100));
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//Saves the document.
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document.Save(Path.GetFullPath(@"Output/Output.pdf"));
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}
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// Create a PFX file using the BouncyCastle.
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static Stream CreatePfxFile(Org.BouncyCastle.X509.X509Certificate certificate, AsymmetricKeyParameter privateKey)
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{
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//Create a certificate entry.
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X509CertificateEntry certEntry = new X509CertificateEntry(certificate);
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string friendlyName = certificate.SubjectDN.ToString();
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//Get bytes of the private key.
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PrivateKeyInfo keyInfo = PrivateKeyInfoFactory.CreatePrivateKeyInfo(privateKey);
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byte[] keyBytes = keyInfo.ToAsn1Object().GetEncoded();
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Pkcs12StoreBuilder builder = new Pkcs12StoreBuilder();
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builder.SetUseDerEncoding(true);
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Pkcs12Store store = builder.Build();
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//Create a store entry.
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store.SetKeyEntry("private", new AsymmetricKeyEntry(privateKey), new X509CertificateEntry[] { certEntry });
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//Save the story to the stream.
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MemoryStream stream = new MemoryStream();
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store.Save(stream, "syncfusion".ToCharArray(), new SecureRandom());
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return stream;
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}

‎Digital Signature/Sign-PDF-with-PEM-Certificate/.NET/Sign-PDF-with-PEM-Certificate/Sign-PDF-with-PEM-Certificate.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net8.0</TargetFramework>
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<RootNamespace>Sign_PDF_with_PEM_Certificate</RootNamespace>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Portable.BouncyCastle" Version="1.9.0" />
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<PackageReference Include="Syncfusion.Pdf.Net.Core" Version="*" />
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</ItemGroup>
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</Project>

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