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using System;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Crmf;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Operators;
namespace Org.BouncyCastle.Crmf
{
public class CertificateRequestMessage
{
public static readonly int popRaVerified = Org.BouncyCastle.Asn1.Crmf.ProofOfPossession.TYPE_RA_VERIFIED;
public static readonly int popSigningKey = Org.BouncyCastle.Asn1.Crmf.ProofOfPossession.TYPE_SIGNING_KEY;
public static readonly int popKeyEncipherment = Org.BouncyCastle.Asn1.Crmf.ProofOfPossession.TYPE_KEY_ENCIPHERMENT;
public static readonly int popKeyAgreement = Org.BouncyCastle.Asn1.Crmf.ProofOfPossession.TYPE_KEY_AGREEMENT;
private readonly CertReqMsg certReqMsg;
private readonly Controls controls;
private static CertReqMsg ParseBytes(byte[] encoding)
{
return CertReqMsg.GetInstance(encoding);
}
/// <summary>
/// Create a CertificateRequestMessage from the passed in bytes.
/// </summary>
/// <param name="encoded">BER/DER encoding of the CertReqMsg structure.</param>
public CertificateRequestMessage(byte[] encoded)
: this(CertReqMsg.GetInstance(encoded))
{
}
public CertificateRequestMessage(CertReqMsg certReqMsg)
{
this.certReqMsg = certReqMsg;
this.controls = certReqMsg.CertReq.Controls;
}
/// <summary>
/// Return the underlying ASN.1 object defining this CertificateRequestMessage object.
/// </summary>
/// <returns>A CertReqMsg</returns>
public CertReqMsg ToAsn1Structure()
{
return certReqMsg;
}
/// <summary>
/// Return the certificate template contained in this message.
/// </summary>
/// <returns>a CertTemplate structure.</returns>
public CertTemplate GetCertTemplate()
{
return this.certReqMsg.CertReq.CertTemplate;
}
/// <summary>
/// Return whether or not this request has control values associated with it.
/// </summary>
/// <returns>true if there are control values present, false otherwise.</returns>
public bool HasControls
{
get { return controls != null; }
}
/// <summary>
/// Return whether or not this request has a specific type of control value.
/// </summary>
/// <param name="objectIdentifier">the type OID for the control value we are checking for.</param>
/// <returns>true if a control value of type is present, false otherwise.</returns>
public bool HasControl(DerObjectIdentifier objectIdentifier)
{
return FindControl(objectIdentifier) != null;
}
/// <summary>
/// Return a control value of the specified type.
/// </summary>
/// <param name="type">the type OID for the control value we are checking for.</param>
/// <returns>the control value if present, null otherwise.</returns>
public IControl GetControl(DerObjectIdentifier type)
{
AttributeTypeAndValue found = FindControl(type);
if (found != null)
{
if (found.Type.Equals(CrmfObjectIdentifiers.id_regCtrl_pkiArchiveOptions))
{
return new PkiArchiveControl(PkiArchiveOptions.GetInstance(found.Value));
}
if (found.Type.Equals(CrmfObjectIdentifiers.id_regCtrl_regToken))
{
return new RegTokenControl(DerUtf8String.GetInstance(found.Value));
}
if (found.Type.Equals(CrmfObjectIdentifiers.id_regCtrl_authenticator))
{
return new AuthenticatorControl(DerUtf8String.GetInstance(found.Value));
}
}
return null;
}
public AttributeTypeAndValue FindControl(DerObjectIdentifier type)
{
if (controls == null)
{
return null;
}
AttributeTypeAndValue[] tAndV = controls.ToAttributeTypeAndValueArray();
AttributeTypeAndValue found = null;
for (int i = 0; i < tAndV.Length; i++)
{
if (tAndV[i].Type.Equals(type))
{
found = tAndV[i];
break;
}
}
return found;
}
/// <summary>
/// Return whether or not this request message has a proof-of-possession field in it.
/// </summary>
/// <returns>true if proof-of-possession is present, false otherwise.</returns>
public bool HasProofOfPossession
{
get { return certReqMsg.Pop != null; }
}
/// <summary>
/// Return the type of the proof-of-possession this request message provides.
/// </summary>
/// <returns>one of: popRaVerified, popSigningKey, popKeyEncipherment, popKeyAgreement</returns>
public int ProofOfPossession
{
get { return certReqMsg.Pop.Type; }
}
/// <summary>
/// Return whether or not the proof-of-possession (POP) is of the type popSigningKey and
/// it has a public key MAC associated with it.
/// </summary>
/// <returns>true if POP is popSigningKey and a PKMAC is present, false otherwise.</returns>
public bool HasSigningKeyProofOfPossessionWithPkMac
{
get
{
ProofOfPossession pop = certReqMsg.Pop;
if (pop.Type == popSigningKey)
{
PopoSigningKey popoSign = PopoSigningKey.GetInstance(pop.Object);
return popoSign.PoposkInput.PublicKeyMac != null;
}
return false;
}
}
/// <summary>
/// Return whether or not a signing key proof-of-possession (POP) is valid.
/// </summary>
/// <param name="verifierProvider">a provider that can produce content verifiers for the signature contained in this POP.</param>
/// <returns>true if the POP is valid, false otherwise.</returns>
/// <exception cref="InvalidOperationException">if there is a problem in verification or content verifier creation.</exception>
/// <exception cref="InvalidOperationException">if POP not appropriate.</exception>
public bool IsValidSigningKeyPop(IVerifierFactoryProvider verifierProvider)
{
ProofOfPossession pop = certReqMsg.Pop;
if (pop.Type == popSigningKey)
{
PopoSigningKey popoSign = PopoSigningKey.GetInstance(pop.Object);
if (popoSign.PoposkInput != null && popoSign.PoposkInput.PublicKeyMac != null)
throw new InvalidOperationException("verification requires password check");
return VerifySignature(verifierProvider, popoSign);
}
throw new InvalidOperationException("not Signing Key type of proof of possession");
}
private bool VerifySignature(IVerifierFactoryProvider verifierFactoryProvider, PopoSigningKey signKey)
{
var verifierFactory = verifierFactoryProvider.CreateVerifierFactory(signKey.AlgorithmIdentifier);
Asn1Encodable asn1Encodable = signKey.PoposkInput;
if (asn1Encodable == null)
{
asn1Encodable = certReqMsg.CertReq;
}
return X509.X509Utilities.VerifySignature(verifierFactory, asn1Encodable, signKey.Signature);
}
/// <summary>
/// Return the ASN.1 encoding of the certReqMsg we wrap.
/// </summary>
/// <returns>a byte array containing the binary encoding of the certReqMsg.</returns>
public byte[] GetEncoded()
{
return certReqMsg.GetEncoded();
}
}
}
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