diff options
Diffstat (limited to 'Crypto/src/x509/X509V3CertificateGenerator.cs')
| -rw-r--r-- | Crypto/src/x509/X509V3CertificateGenerator.cs | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/Crypto/src/x509/X509V3CertificateGenerator.cs b/Crypto/src/x509/X509V3CertificateGenerator.cs new file mode 100644 index 000000000..bb0dd9cbc --- /dev/null +++ b/Crypto/src/x509/X509V3CertificateGenerator.cs @@ -0,0 +1,346 @@ +using System; +using System.Collections; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Math; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Security.Certificates; +using Org.BouncyCastle.X509.Extension; + +namespace Org.BouncyCastle.X509 +{ + /// <summary> + /// A class to Generate Version 3 X509Certificates. + /// </summary> + public class X509V3CertificateGenerator + { + private readonly X509ExtensionsGenerator extGenerator = new X509ExtensionsGenerator(); + + private V3TbsCertificateGenerator tbsGen; + private DerObjectIdentifier sigOid; + private AlgorithmIdentifier sigAlgId; + private string signatureAlgorithm; + + public X509V3CertificateGenerator() + { + tbsGen = new V3TbsCertificateGenerator(); + } + + /// <summary> + /// Reset the Generator. + /// </summary> + public void Reset() + { + tbsGen = new V3TbsCertificateGenerator(); + extGenerator.Reset(); + } + + /// <summary> + /// Set the certificate's serial number. + /// </summary> + /// <remarks>Make serial numbers long, if you have no serial number policy make sure the number is at least 16 bytes of secure random data. + /// You will be surprised how ugly a serial number collision can Get.</remarks> + /// <param name="serialNumber">The serial number.</param> + public void SetSerialNumber( + BigInteger serialNumber) + { + if (serialNumber.SignValue <= 0) + { + throw new ArgumentException("serial number must be a positive integer", "serialNumber"); + } + + tbsGen.SetSerialNumber(new DerInteger(serialNumber)); + } + + /// <summary> + /// Set the distinguished name of the issuer. + /// The issuer is the entity which is signing the certificate. + /// </summary> + /// <param name="issuer">The issuer's DN.</param> + public void SetIssuerDN( + X509Name issuer) + { + tbsGen.SetIssuer(issuer); + } + + /// <summary> + /// Set the date that this certificate is to be valid from. + /// </summary> + /// <param name="date"/> + public void SetNotBefore( + DateTime date) + { + tbsGen.SetStartDate(new Time(date)); + } + + /// <summary> + /// Set the date after which this certificate will no longer be valid. + /// </summary> + /// <param name="date"/> + public void SetNotAfter( + DateTime date) + { + tbsGen.SetEndDate(new Time(date)); + } + + /// <summary> + /// Set the DN of the entity that this certificate is about. + /// </summary> + /// <param name="subject"/> + public void SetSubjectDN( + X509Name subject) + { + tbsGen.SetSubject(subject); + } + + /// <summary> + /// Set the public key that this certificate identifies. + /// </summary> + /// <param name="publicKey"/> + public void SetPublicKey( + AsymmetricKeyParameter publicKey) + { + tbsGen.SetSubjectPublicKeyInfo(SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(publicKey)); + } + + /// <summary> + /// Set the signature algorithm that will be used to sign this certificate. + /// </summary> + /// <param name="signatureAlgorithm"/> + public void SetSignatureAlgorithm( + string signatureAlgorithm) + { + this.signatureAlgorithm = signatureAlgorithm; + + try + { + sigOid = X509Utilities.GetAlgorithmOid(signatureAlgorithm); + } + catch (Exception) + { + throw new ArgumentException("Unknown signature type requested: " + signatureAlgorithm); + } + + sigAlgId = X509Utilities.GetSigAlgID(sigOid, signatureAlgorithm); + + tbsGen.SetSignature(sigAlgId); + } + + /// <summary> + /// Set the subject unique ID - note: it is very rare that it is correct to do this. + /// </summary> + /// <param name="uniqueID"/> + public void SetSubjectUniqueID( + bool[] uniqueID) + { + tbsGen.SetSubjectUniqueID(booleanToBitString(uniqueID)); + } + + /// <summary> + /// Set the issuer unique ID - note: it is very rare that it is correct to do this. + /// </summary> + /// <param name="uniqueID"/> + public void SetIssuerUniqueID( + bool[] uniqueID) + { + tbsGen.SetIssuerUniqueID(booleanToBitString(uniqueID)); + } + + private DerBitString booleanToBitString( + bool[] id) + { + byte[] bytes = new byte[(id.Length + 7) / 8]; + + for (int i = 0; i != id.Length; i++) + { + if (id[i]) + { + bytes[i / 8] |= (byte)(1 << ((7 - (i % 8)))); + } + } + + int pad = id.Length % 8; + + if (pad == 0) + { + return new DerBitString(bytes); + } + + return new DerBitString(bytes, 8 - pad); + } + + /// <summary> + /// Add a given extension field for the standard extensions tag (tag 3). + /// </summary> + /// <param name="oid">string containing a dotted decimal Object Identifier.</param> + /// <param name="critical">Is it critical.</param> + /// <param name="extensionValue">The value.</param> + public void AddExtension( + string oid, + bool critical, + Asn1Encodable extensionValue) + { + extGenerator.AddExtension(new DerObjectIdentifier(oid), critical, extensionValue); + } + + /// <summary> + /// Add an extension to this certificate. + /// </summary> + /// <param name="oid">Its Object Identifier.</param> + /// <param name="critical">Is it critical.</param> + /// <param name="extensionValue">The value.</param> + public void AddExtension( + DerObjectIdentifier oid, + bool critical, + Asn1Encodable extensionValue) + { + extGenerator.AddExtension(oid, critical, extensionValue); + } + + /// <summary> + /// Add an extension using a string with a dotted decimal OID. + /// </summary> + /// <param name="oid">string containing a dotted decimal Object Identifier.</param> + /// <param name="critical">Is it critical.</param> + /// <param name="extensionValue">byte[] containing the value of this extension.</param> + public void AddExtension( + string oid, + bool critical, + byte[] extensionValue) + { + extGenerator.AddExtension(new DerObjectIdentifier(oid), critical, new DerOctetString(extensionValue)); + } + + /// <summary> + /// Add an extension to this certificate. + /// </summary> + /// <param name="oid">Its Object Identifier.</param> + /// <param name="critical">Is it critical.</param> + /// <param name="extensionValue">byte[] containing the value of this extension.</param> + public void AddExtension( + DerObjectIdentifier oid, + bool critical, + byte[] extensionValue) + { + extGenerator.AddExtension(oid, critical, new DerOctetString(extensionValue)); + } + + /// <summary> + /// Add a given extension field for the standard extensions tag (tag 3), + /// copying the extension value from another certificate. + /// </summary> + public void CopyAndAddExtension( + string oid, + bool critical, + X509Certificate cert) + { + CopyAndAddExtension(new DerObjectIdentifier(oid), critical, cert); + } + + /** + * add a given extension field for the standard extensions tag (tag 3) + * copying the extension value from another certificate. + * @throws CertificateParsingException if the extension cannot be extracted. + */ + public void CopyAndAddExtension( + DerObjectIdentifier oid, + bool critical, + X509Certificate cert) + { + Asn1OctetString extValue = cert.GetExtensionValue(oid); + + if (extValue == null) + { + throw new CertificateParsingException("extension " + oid + " not present"); + } + + try + { + Asn1Encodable value = X509ExtensionUtilities.FromExtensionValue(extValue); + + this.AddExtension(oid, critical, value); + } + catch (Exception e) + { + throw new CertificateParsingException(e.Message, e); + } + } + + /// <summary> + /// Generate an X509Certificate. + /// </summary> + /// <param name="privateKey">The private key of the issuer that is signing this certificate.</param> + /// <returns>An X509Certificate.</returns> + public X509Certificate Generate( + AsymmetricKeyParameter privateKey) + { + return Generate(privateKey, null); + } + + /// <summary> + /// Generate an X509Certificate using your own SecureRandom. + /// </summary> + /// <param name="privateKey">The private key of the issuer that is signing this certificate.</param> + /// <param name="random">You Secure Random instance.</param> + /// <returns>An X509Certificate.</returns> + public X509Certificate Generate( + AsymmetricKeyParameter privateKey, + SecureRandom random) + { + TbsCertificateStructure tbsCert = GenerateTbsCert(); + byte[] signature; + + try + { + signature = X509Utilities.GetSignatureForObject( + sigOid, signatureAlgorithm, privateKey, random, tbsCert); + } + catch (Exception e) + { + // TODO +// throw new ExtCertificateEncodingException("exception encoding TBS cert", e); + throw new CertificateEncodingException("exception encoding TBS cert", e); + } + + try + { + return GenerateJcaObject(tbsCert, signature); + } + catch (CertificateParsingException e) + { + // TODO + // throw new ExtCertificateEncodingException("exception producing certificate object", e); + throw new CertificateEncodingException("exception producing certificate object", e); + } + } + + private TbsCertificateStructure GenerateTbsCert() + { + if (!extGenerator.IsEmpty) + { + tbsGen.SetExtensions(extGenerator.Generate()); + } + + return tbsGen.GenerateTbsCertificate(); + } + + private X509Certificate GenerateJcaObject( + TbsCertificateStructure tbsCert, + byte[] signature) + { + return new X509Certificate( + new X509CertificateStructure(tbsCert, sigAlgId, new DerBitString(signature))); + } + + /// <summary> + /// Allows enumeration of the signature names supported by the generator. + /// </summary> + public IEnumerable SignatureAlgNames + { + get { return X509Utilities.GetAlgNames(); } + } + } +} |