Allow attestion of certificate and updated workflow

Update the workflow to do basic Pester
Update Confirm-YubiKeyAttestion to allow for Certificate with embedded AttestionData.

.github/workflows/dotnet-format.yaml → .github/workflows/main.yaml

@@ -1,5 +1,5 @@
-# dotnet-format.yaml
-name: dotnet Format
+# main.yaml
+name: main
 
 on:
   pull_request:
@@ -28,3 +28,26 @@ jobs:
           echo "There are uncommitted changes after running dotnet format."
           exit 1
         fi
+
+   - name: Install dependencies
+      run: dotnet restore
+
+    - name: Build
+      run: dotnet build --no-restore -c Release
+
+    - name: Test
+      run: dotnet test --no-restore
+
+    - name: Set up PowerShell 7
+      uses: actions/setup-pwsh@v2
+      with:
+        pwsh-version: '7.x'
+
+    - name: Run Pester Tests
+      shell: pwsh
+      run: |
+        # Import the module
+        Import-Module .\Module\bin\module\Release\net8.0\powershellYK.psd1
+
+        # Run Pester tests
+        IInvoke-Pester -TagFilter 'Without-Yubikey' -Output Detailed

Docs/Commands/Confirm-YubikeyAttestion.md

@@ -29,6 +29,11 @@ Confirm-YubikeyAttestion -AttestionCertificate <PSObject> -IntermediateCertifica
  [<CommonParameters>]
 ```
 
+### CertificateIncludingAttestion
+```
+Confirm-YubikeyAttestion -CertificateIncludingAttestion <PSObject> [<CommonParameters>]
+```
+
 ## DESCRIPTION
 This cmdlet allows for verification of the attestion of YubiKeys. This can be used both to verify the attestion certificate and Certificate Request with and without built in attestion.
 
@@ -92,6 +97,21 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
+### -CertificateIncludingAttestion
+CertificateIncludingAttestion
+
+```yaml
+Type: PSObject
+Parameter Sets: CertificateIncludingAttestion
+Aliases:
+
+Required: True
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
 ### -CertificateRequest
 Specifies a CertificateRequest to check. The acceptable values for this parameter are:
 - A file path

Module/Cmdlets/Other/ConfirmYubikeyAttestion.cs

@@ -26,13 +26,20 @@ public class ConfirmYubikeyAttestionCommand : PSCmdlet
 
         [TransformCertificatePath_Certificate()]
         [ValidateX509Certificate2_string()]
-        [Parameter(Mandatory = true, ValueFromPipeline = false, HelpMessage = "AttestionCertificate", ParameterSetName = "requestWithExternalAttestion")]
+        [Parameter(Mandatory = true, ValueFromPipeline = false, HelpMessage = "IntermediateCertificate", ParameterSetName = "requestWithExternalAttestion")]
         [Parameter(Mandatory = true, ValueFromPipeline = false, HelpMessage = "IntermediateCertificate", ParameterSetName = "JustAttestCertificate")]
         public PSObject? IntermediateCertificate { get; set; }
 
+        [TransformCertificatePath_Certificate()]
+        [ValidateX509Certificate2_string()]
+        [Parameter(Mandatory = true, ValueFromPipeline = false, HelpMessage = "CertificateIncludingAttestion", ParameterSetName = "CertificateIncludingAttestion")]
+        public PSObject? CertificateIncludingAttestion { get; set; }
+
+
         private CertificateRequest? _CertificateRequest;
         private X509Certificate2? _AttestionCertificate;
         private X509Certificate2? _IntermediateCertificate;
+        private X509Certificate2? _CertificateIncludingAttestion;
         private static X509Certificate2 _YubikeyValidationCA = new X509Certificate2(new byte[] { 0x30, 0x82, 0x3, 0x17, 0x30, 0x82, 0x1, 0xFF, 0xA0, 0x3, 0x2, 0x1, 0x2, 0x2, 0x3, 0x4, 0x6, 0x47, 0x30, 0xD, 0x6, 0x9, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0xD, 0x1, 0x1, 0xB, 0x5, 0x0, 0x30, 0x2B, 0x31, 0x29, 0x30, 0x27, 0x6, 0x3, 0x55, 0x4, 0x3, 0xC, 0x20, 0x59, 0x75, 0x62, 0x69, 0x63, 0x6F, 0x20, 0x50, 0x49, 0x56, 0x20, 0x52, 0x6F, 0x6F, 0x74, 0x20, 0x43, 0x41, 0x20, 0x53, 0x65, 0x72, 0x69, 0x61, 0x6C, 0x20, 0x32, 0x36, 0x33, 0x37, 0x35, 0x31, 0x30, 0x20, 0x17, 0xD, 0x31, 0x36, 0x30, 0x33, 0x31, 0x34, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x5A, 0x18, 0xF, 0x32, 0x30, 0x35, 0x32, 0x30, 0x34, 0x31, 0x37, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x5A, 0x30, 0x2B, 0x31, 0x29, 0x30, 0x27, 0x6, 0x3, 0x55, 0x4, 0x3, 0xC, 0x20, 0x59, 0x75, 0x62, 0x69, 0x63, 0x6F, 0x20, 0x50, 0x49, 0x56, 0x20, 0x52, 0x6F, 0x6F, 0x74, 0x20, 0x43, 0x41, 0x20, 0x53, 0x65, 0x72, 0x69, 0x61, 0x6C, 0x20, 0x32, 0x36, 0x33, 0x37, 0x35, 0x31, 0x30, 0x82, 0x1, 0x22, 0x30, 0xD, 0x6, 0x9, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0xD, 0x1, 0x1, 0x1, 0x5, 0x0, 0x3, 0x82, 0x1, 0xF, 0x0, 0x30, 0x82, 0x1, 0xA, 0x2, 0x82, 0x1, 0x1, 0x0, 0xC3, 0x76, 0x70, 0xC4, 0xCD, 0x47, 0xA6, 0x2, 0x75, 0xC4, 0xC5, 0x47, 0x1B, 0x8F, 0xCB, 0x7D, 0x4F, 0x69, 0xB4, 0x67, 0xE6, 0x6E, 0xA9, 0x27, 0xE9, 0xD2, 0x13, 0x41, 0xD1, 0x5A, 0x9A, 0x1A, 0x33, 0xC7, 0xDC, 0xF3, 0x1, 0xC2, 0xF9, 0x39, 0x9B, 0xF7, 0xC8, 0xE6, 0x36, 0xF8, 0x56, 0x34, 0x4D, 0x84, 0x8A, 0x55, 0x3C, 0xE6, 0xE6, 0xA, 0x7C, 0x41, 0x4F, 0xF5, 0xDE, 0x90, 0xD8, 0x69, 0xB2, 0xB6, 0xA0, 0x67, 0xC5, 0x9B, 0x0, 0x6B, 0x72, 0xAA, 0x66, 0x20, 0x82, 0xC7, 0x62, 0xF0, 0x43, 0x88, 0x98, 0x10, 0xE6, 0xF5, 0x96, 0x58, 0x28, 0xB5, 0x5A, 0xFF, 0xC2, 0x11, 0x29, 0x75, 0x53, 0xAA, 0x8E, 0x85, 0x34, 0x3F, 0x97, 0xB5, 0x8F, 0x5C, 0xBB, 0x39, 0xFC, 0xE, 0xBE, 0x4C, 0xBF, 0xF8, 0x5, 0xC8, 0x37, 0xFF, 0x57, 0xA7, 0x45, 0x45, 0x95, 0x84, 0x64, 0xDA, 0xD4, 0x3D, 0x19, 0xC7, 0x58, 0x28, 0x39, 0xAA, 0x53, 0xE7, 0x5B, 0xF6, 0x22, 0xB0, 0xA4, 0xC, 0xE2, 0x77, 0x8A, 0x7, 0x5, 0x52, 0xC8, 0x86, 0x60, 0xF7, 0xA6, 0xF9, 0x16, 0x69, 0x10, 0x36, 0x1F, 0x70, 0xC0, 0xF6, 0xDE, 0xC7, 0xFC, 0x73, 0x6A, 0xE6, 0xFD, 0xCE, 0x88, 0xED, 0x63, 0xC8, 0xB6, 0x5E, 0x2A, 0xA6, 0x68, 0x31, 0xB3, 0xCE, 0x6E, 0xBC, 0x6A, 0xE, 0xF, 0xBD, 0x7C, 0xE7, 0x52, 0x87, 0x38, 0x1F, 0xC0, 0x2A, 0xA0, 0x4F, 0x75, 0xD5, 0x99, 0x37, 0xA2, 0xC2, 0xF0, 0x52, 0x4D, 0xCB, 0x72, 0x8B, 0xD9, 0x87, 0x41, 0xF6, 0x1D, 0xD8, 0x3C, 0x24, 0x6A, 0xAC, 0x51, 0x9C, 0xB6, 0xCD, 0x57, 0x22, 0xBD, 0xCE, 0x5F, 0x83, 0xCE, 0x34, 0x86, 0xA7, 0xD2, 0x21, 0x54, 0xF8, 0x95, 0xB4, 0x67, 0xAD, 0x5F, 0x4D, 0x9D, 0xC6, 0x14, 0x27, 0x19, 0x2E, 0xCA, 0xE8, 0x13, 0xB4, 0x41, 0xEF, 0x2, 0x3, 0x1, 0x0, 0x1, 0xA3, 0x42, 0x30, 0x40, 0x30, 0x1D, 0x6, 0x3, 0x55, 0x1D, 0xE, 0x4, 0x16, 0x4, 0x14, 0xCA, 0x5F, 0xCA, 0xF2, 0xC4, 0xA2, 0x31, 0x9C, 0xE9, 0x22, 0x5F, 0xF1, 0xEC, 0xF4, 0xD5, 0xDF, 0x2, 0xBF, 0x83, 0xBF, 0x30, 0xF, 0x6, 0x3, 0x55, 0x1D, 0x13, 0x4, 0x8, 0x30, 0x6, 0x1, 0x1, 0xFF, 0x2, 0x1, 0x1, 0x30, 0xE, 0x6, 0x3, 0x55, 0x1D, 0xF, 0x1, 0x1, 0xFF, 0x4, 0x4, 0x3, 0x2, 0x1, 0x6, 0x30, 0xD, 0x6, 0x9, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0xD, 0x1, 0x1, 0xB, 0x5, 0x0, 0x3, 0x82, 0x1, 0x1, 0x0, 0x5C, 0xEC, 0x88, 0x7C, 0x5, 0xCD, 0x5F, 0x90, 0x2F, 0x85, 0xC8, 0xDD, 0x5F, 0x86, 0x35, 0xA2, 0xA0, 0x10, 0x8C, 0xAF, 0x7B, 0xE3, 0x9D, 0xE8, 0x7B, 0x30, 0xB6, 0xC0, 0xEA, 0x44, 0xA8, 0xC9, 0x61, 0x7B, 0xD0, 0xDD, 0xEC, 0x5E, 0x16, 0xD7, 0xBD, 0x3E, 0x1E, 0x46, 0x1D, 0x21, 0xBF, 0x1A, 0xAF, 0x31, 0x93, 0x63, 0x3D, 0x4F, 0xD5, 0x95, 0x19, 0xFA, 0x80, 0xB5, 0x6D, 0xA0, 0x48, 0xA4, 0xC, 0xBA, 0xD8, 0x15, 0x73, 0x7A, 0x1E, 0x1E, 0x96, 0x9B, 0x2C, 0xB5, 0x19, 0x39, 0xEC, 0xA6, 0x73, 0xAF, 0x32, 0xFC, 0xF6, 0x94, 0xB2, 0xAE, 0xCA, 0x6F, 0x4A, 0x61, 0xD6, 0xB, 0xE, 0x9, 0xE3, 0xDC, 0x17, 0x80, 0xBF, 0x32, 0x21, 0x57, 0x3C, 0xD8, 0x49, 0xE5, 0x3B, 0xEF, 0xF0, 0xAE, 0xA6, 0x87, 0xE3, 0xD3, 0xDD, 0xCE, 0xB8, 0xB, 0x30, 0x5B, 0x48, 0xD8, 0xBD, 0x7B, 0x6, 0x4F, 0x28, 0xB1, 0xE8, 0x1D, 0xDD, 0x6D, 0x6E, 0x72, 0x5A, 0xFC, 0x92, 0xF7, 0x33, 0x57, 0x6A, 0xA1, 0x9A, 0x52, 0x63, 0xF7, 0x53, 0xDF, 0xDB, 0xE8, 0x39, 0x47, 0x74, 0x3A, 0x20, 0x30, 0xBB, 0xB7, 0x54, 0xBA, 0x41, 0x7, 0xD6, 0xE6, 0xE5, 0xB8, 0xDA, 0x29, 0x65, 0x89, 0x62, 0x5, 0xA5, 0xB4, 0x25, 0x60, 0x51, 0xB1, 0x6A, 0x16, 0xAC, 0xA2, 0xE3, 0xE2, 0x44, 0xD3, 0x5E, 0x1C, 0x4A, 0x4, 0x79, 0xEC, 0x97, 0x2E, 0xDD, 0xD6, 0x62, 0x7A, 0x10, 0x7A, 0x52, 0xD0, 0xF, 0x81, 0xA7, 0x7D, 0x2F, 0x97, 0xD, 0xBE, 0xE6, 0xBF, 0x21, 0x64, 0x66, 0x9B, 0xE0, 0xD, 0xCB, 0x73, 0xB6, 0x2C, 0x7F, 0xBE, 0x3F, 0x29, 0x7C, 0x49, 0x11, 0x33, 0x53, 0xCA, 0x27, 0x6C, 0x1B, 0x23, 0x32, 0xF, 0x50, 0xE, 0x24, 0x9F, 0xE6, 0x82, 0x4B, 0x2A, 0xF7, 0x7F, 0x45, 0xE9, 0xFE, 0xCC, 0x66, 0x3B });
 
         private static string pemFormatRegex = "^-----[^-]*-----(?<certificateContent>.*)-----[^-]*-----$";
@@ -59,16 +66,16 @@ protected override void ProcessRecord()
             Match? match;
             X509Extension? extensioncsr;
 
-            if (CertificateRequest is not null)
+            if (ParameterSetName == "requestWithBuiltinAttestion")
             {
-                if (CertificateRequest.BaseObject is string)
+                if (CertificateRequest is not null && CertificateRequest.BaseObject is string)
                 {
                     WriteDebug("CertificateRequest is string");
                     match = regex.Match(CertificateRequest.BaseObject.ToString()!);
                     if (match.Success)
                     {
                         WriteDebug("CertificateRequest is PEM string");
-                        _CertificateRequest = LoadSigningRequestPem((string)CertificateRequest!.BaseObject, HashAlgorithmName.SHA256, CertificateRequestLoadOptions.UnsafeLoadCertificateExtensions);
+                        _CertificateRequest = LoadSigningRequestPem((string)CertificateRequest.BaseObject, HashAlgorithmName.SHA256, CertificateRequestLoadOptions.UnsafeLoadCertificateExtensions);
                     }
                     else // Check if it is a file or throw an error.
                     {
@@ -87,65 +94,120 @@ protected override void ProcessRecord()
                         }
                     }
                 }
-                else if (CertificateRequest.BaseObject is byte[])
+                else if (CertificateRequest is not null && CertificateRequest.BaseObject is byte[])
                 {
                     WriteDebug("CertificateRequest is byte[]");
                     _CertificateRequest = LoadSigningRequest((byte[])CertificateRequest.BaseObject, HashAlgorithmName.SHA256, CertificateRequestLoadOptions.UnsafeLoadCertificateExtensions);
                 }
-            }
 
-            if (AttestionCertificate is not null)
-            {
-                if (AttestionCertificate.BaseObject is X509Certificate2)
-                {
-                    WriteDebug("AttestionCertificate is X509Certificate2");
-                    _AttestionCertificate = (X509Certificate2)AttestionCertificate.BaseObject;
-                }
-                else
-                {
-                    throw new ArgumentException("Must be of type string or X509Certificate2", "AttestionCertificate");
-                }
-            }
-            else
-            {
                 // If the certificateRequest contains the attestion certificate, extract it.
                 // Due to yubico-piv-tool not storing it in the correct place, we need to check both places.
                 // https://docs.yubico.com/hardware/oid/oid-piv-arc.html
                 if (_CertificateRequest!.CertificateExtensions.Any(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.11"))
                 {
                     extensioncsr = _CertificateRequest!.CertificateExtensions
                         .Cast<X509Extension>()
-                        .FirstOrDefault(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.11");
+                        .FirstOrDefault(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.11", new X509Extension(new AsnEncodedData("1.3.6.1.4.1.41482.3.11", new byte[] { 0x00 }), false));
                     _out_AttestionDataLocation = "1.3.6.1.4.1.41482.3.11";
-                    if (extensioncsr is not null)
+                    try
                     {
                         _AttestionCertificate = new X509Certificate2(extensioncsr.RawData);
                     }
-                    else
+                    catch
                     {
-                        throw new Exception("Attestion Certificate is missing");
+                        throw new Exception("Failed to parse the embedded attestiondata certificate");
                     }
                 }
                 else if (_CertificateRequest!.CertificateExtensions.Any(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.1"))
                 {
                     extensioncsr = _CertificateRequest!.CertificateExtensions
                         .Cast<X509Extension>()
-                        .FirstOrDefault(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.1");
+                        .FirstOrDefault(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.1", new X509Extension(new AsnEncodedData("1.3.6.1.4.1.41482.3.1", new byte[] { 0x00 }), false));
                     _out_AttestionDataLocation = "1.3.6.1.4.1.41482.3.1";
-                    if (extensioncsr is not null)
+                    try
                     {
                         _AttestionCertificate = new X509Certificate2(extensioncsr.RawData);
                     }
-                    else
+                    catch
+                    {
+                        throw new ArgumentException("Failed to parse the embedded attestiondata certificate");
+                    }
+                }
+                else
+                {
+                    throw new ArgumentException("The CertificateRequest does not contain embedded attestion data");
+                }
+
+                if (_CertificateRequest!.CertificateExtensions.Any(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.2"))
+                {
+                    // Read from CSR 1.3.6.1.4.1.41482.3.2
+                    extensioncsr = _CertificateRequest!.CertificateExtensions
+                    .Cast<X509Extension>()
+                    .FirstOrDefault(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.2", new X509Extension(new AsnEncodedData("1.3.6.1.4.1.41482.3.2", new byte[] { 0x00 }), false));
+                    try
                     {
-                        throw new Exception("Attestion Certificate is missing");
+                        _IntermediateCertificate = new X509Certificate2(extensioncsr.RawData);
+                    }
+                    catch
+                    {
+                        throw new ArgumentException("Failed to parse the embedded intermediate attestion certificate");
                     }
                 }
+                else
+                {
+                    throw new ArgumentException("The CertificateRequest does not contain embedded intermediate attestion certificate");
+                }
             }
+            else if (ParameterSetName == "CertificateIncludingAttestion")
+            {
+                if (CertificateIncludingAttestion is not null && CertificateIncludingAttestion.BaseObject is X509Certificate2)
+                {
+                     _CertificateIncludingAttestion = (X509Certificate2)CertificateIncludingAttestion.BaseObject;
 
-            if (IntermediateCertificate is not null)
+
+                    if (_CertificateIncludingAttestion.Extensions.Any(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.1"))
+                    {
+                        WriteDebug("Found 1.3.6.1.4.1.41482.3.2 extension, trying to extract attestiondata certificate");
+                        extensioncsr = _CertificateIncludingAttestion.Extensions.Cast<X509Extension>().FirstOrDefault(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.1", new X509Extension(new AsnEncodedData("1.3.6.1.4.1.41482.3.1", new byte[] { 0x00 }), false));
+                        _out_AttestionDataLocation = "1.3.6.1.4.1.41482.3.1";
+                        try
+                        {
+                            _AttestionCertificate = new X509Certificate2(extensioncsr.RawData);
+                        }
+                        catch
+                        {
+                            throw new ArgumentException("Failed to parse the embedded attestiondata certificate");
+                        }
+                    }
+                    else
+                    {
+                        throw new Exception("Certificate does not contain attestion data");
+                    }
+
+                    if (_CertificateIncludingAttestion!.Extensions.Any(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.2"))
+                    {
+                        WriteDebug("Found 1.3.6.1.4.1.41482.3.2 extension, trying to extract intermediate certificate");
+                        // Read from CSR 1.3.6.1.4.1.41482.3.2
+                        extensioncsr = _CertificateIncludingAttestion.Extensions.Cast<X509Extension>().FirstOrDefault(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.2", new X509Extension(new AsnEncodedData("1.3.6.1.4.1.41482.3.2", new byte[] { 0x00 }), false));
+                        try
+                        {
+                            _IntermediateCertificate = new X509Certificate2(extensioncsr.RawData);
+                        }
+                        catch
+                        {
+                            throw new ArgumentException("Failed to parse the embedded intermediate attestion certificate");
+                        }
+
+                    }
+                }
+                else
+                {
+                    throw new ArgumentException("Must be of type string or X509Certificate2", "CertificateWithAttestionData");
+                }
+            }
+            else if (ParameterSetName == "JustAttestCertificate")
             {
-                if (IntermediateCertificate.BaseObject is X509Certificate2)
+                if (IntermediateCertificate!.BaseObject is X509Certificate2)
                 {
                     WriteDebug("IntermediateCertificate is X509Certificate2");
                     _IntermediateCertificate = (X509Certificate2)IntermediateCertificate.BaseObject;
@@ -154,22 +216,20 @@ protected override void ProcessRecord()
                 {
                     throw new ArgumentException("Must be of type string or X509Certificate2", "IntermediateCertificate");
                 }
-            }
-            else
-            {
-                // Read from CSR 1.3.6.1.4.1.41482.3.2
-                extensioncsr = _CertificateRequest!.CertificateExtensions
-                    .Cast<X509Extension>()
-                    .FirstOrDefault(e => e.Oid!.Value == "1.3.6.1.4.1.41482.3.2");
-                if (extensioncsr is not null)
+
+                if (AttestionCertificate!.BaseObject is X509Certificate2)
                 {
-                    _IntermediateCertificate = new X509Certificate2(extensioncsr.RawData);
+                    WriteDebug("AttestionCertificate is X509Certificate2");
+                    _AttestionCertificate = (X509Certificate2)AttestionCertificate.BaseObject;
                 }
                 else
                 {
-                    throw new Exception("Intermediate Certificate is missing!");
+                    throw new ArgumentException("Must be of type string or X509Certificate2", "AttestionCertificate");
                 }
-
+            }
+            else
+            {
+                throw new Exception("Invalid ParameterSetName");
             }
 
             if (_AttestionCertificate is null || _IntermediateCertificate is null)
@@ -252,10 +312,14 @@ protected override void ProcessRecord()
                 }
 
                 // Check if the public key in the CSR matches the public key in the attestion certificate
-                if (_CertificateRequest is not null)
+                if (ParameterSetName == "requestWithBuiltinAttestion" && _CertificateRequest is not null)
                 {
                     _out_AttestionMatchesCSR = _AttestionCertificate.PublicKey.EncodedKeyValue.RawData.SequenceEqual(_CertificateRequest.PublicKey.EncodedKeyValue.RawData);
                 }
+                else if(ParameterSetName == "CertificateIncludingAttestion" && _CertificateIncludingAttestion is not null)
+                {
+                    _out_AttestionMatchesCSR = _AttestionCertificate.PublicKey.EncodedKeyValue.RawData.SequenceEqual(_CertificateIncludingAttestion.PublicKey.EncodedKeyValue.RawData);
+                }
 
                 // Figure out the PublicKey algorithm
                 if (_AttestionCertificate.PublicKey.Oid.FriendlyName == "RSA")