Add constructor from template certificate
1 files changed, 33 insertions, 0 deletions
diff --git a/crypto/src/x509/X509V3CertificateGenerator.cs b/crypto/src/x509/X509V3CertificateGenerator.cs
index ee35b9479..d5c9ffe92 100644
--- a/crypto/src/x509/X509V3CertificateGenerator.cs
+++ b/crypto/src/x509/X509V3CertificateGenerator.cs
@@ -26,6 +26,39 @@ namespace Org.BouncyCastle.X509
tbsGen = new V3TbsCertificateGenerator();
}
+ /// <summary>Create a generator for a version 3 certificate, initialised with another certificate.</summary>
+ /// <param name="template">Template certificate to base the new one on.</param>
+ public X509V3CertificateGenerator(X509Certificate template)
+ : this(template.CertificateStructure)
+ {
+ }
+
+ public X509V3CertificateGenerator(X509CertificateStructure template)
+ {
+ tbsGen = new V3TbsCertificateGenerator();
+ tbsGen.SetSerialNumber(template.SerialNumber);
+ tbsGen.SetIssuer(template.Issuer);
+ tbsGen.SetStartDate(template.StartDate);
+ tbsGen.SetEndDate(template.EndDate);
+ tbsGen.SetSubject(template.Subject);
+ tbsGen.SetSubjectPublicKeyInfo(template.SubjectPublicKeyInfo);
+
+ var extensions = template.TbsCertificate.Extensions;
+
+ foreach (var oid in extensions.ExtensionOids)
+ {
+ if (X509Extensions.SubjectAltPublicKeyInfo.Equals(oid) ||
+ X509Extensions.AltSignatureAlgorithm.Equals(oid) ||
+ X509Extensions.AltSignatureValue.Equals(oid))
+ {
+ continue;
+ }
+
+ X509Extension ext = extensions.GetExtension(oid);
+ extGenerator.AddExtension(oid, ext.critical, ext.Value.GetOctets());
+ }
+ }
+
/// <summary>
/// Reset the Generator.
/// </summary>
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