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using System;
using System.Collections.Generic;
using System.IO;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Ocsp;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities.Collections;
using Org.BouncyCastle.X509;
namespace Org.BouncyCastle.Ocsp
{
/**
* <pre>
* OcspRequest ::= SEQUENCE {
* tbsRequest TBSRequest,
* optionalSignature [0] EXPLICIT Signature OPTIONAL }
*
* TBSRequest ::= SEQUENCE {
* version [0] EXPLICIT Version DEFAULT v1,
* requestorName [1] EXPLICIT GeneralName OPTIONAL,
* requestList SEQUENCE OF Request,
* requestExtensions [2] EXPLICIT Extensions OPTIONAL }
*
* Signature ::= SEQUENCE {
* signatureAlgorithm AlgorithmIdentifier,
* signature BIT STRING,
* certs [0] EXPLICIT SEQUENCE OF Certificate OPTIONAL}
*
* Version ::= INTEGER { v1(0) }
*
* Request ::= SEQUENCE {
* reqCert CertID,
* singleRequestExtensions [0] EXPLICIT Extensions OPTIONAL }
*
* CertID ::= SEQUENCE {
* hashAlgorithm AlgorithmIdentifier,
* issuerNameHash OCTET STRING, -- Hash of Issuer's DN
* issuerKeyHash OCTET STRING, -- Hash of Issuers public key
* serialNumber CertificateSerialNumber }
* </pre>
*/
public class OcspReq
: X509ExtensionBase
{
private OcspRequest req;
public OcspReq(
OcspRequest req)
{
this.req = req;
}
public OcspReq(
byte[] req)
: this(new Asn1InputStream(req))
{
}
public OcspReq(
Stream inStr)
: this(new Asn1InputStream(inStr))
{
}
private OcspReq(
Asn1InputStream aIn)
{
try
{
this.req = OcspRequest.GetInstance(aIn.ReadObject());
}
catch (ArgumentException e)
{
throw new IOException("malformed request: " + e.Message);
}
catch (InvalidCastException e)
{
throw new IOException("malformed request: " + e.Message);
}
}
/**
* Return the DER encoding of the tbsRequest field.
* @return DER encoding of tbsRequest
* @throws OcspException in the event of an encoding error.
*/
public byte[] GetTbsRequest()
{
try
{
return req.TbsRequest.GetEncoded();
}
catch (IOException e)
{
throw new OcspException("problem encoding tbsRequest", e);
}
}
public int Version
{
get { return req.TbsRequest.Version.IntValueExact + 1; }
}
public GeneralName RequestorName
{
get { return GeneralName.GetInstance(req.TbsRequest.RequestorName); }
}
public Req[] GetRequestList()
{
Asn1Sequence seq = req.TbsRequest.RequestList;
Req[] requests = new Req[seq.Count];
for (int i = 0; i != requests.Length; i++)
{
requests[i] = new Req(Request.GetInstance(seq[i]));
}
return requests;
}
public X509Extensions RequestExtensions
{
get { return X509Extensions.GetInstance(req.TbsRequest.RequestExtensions); }
}
protected override X509Extensions GetX509Extensions()
{
return RequestExtensions;
}
/**
* return the object identifier representing the signature algorithm
*/
public string SignatureAlgOid
{
get
{
if (!this.IsSigned)
return null;
return req.OptionalSignature.SignatureAlgorithm.Algorithm.Id;
}
}
public byte[] GetSignature()
{
if (!this.IsSigned)
return null;
return req.OptionalSignature.GetSignatureOctets();
}
private List<X509Certificate> GetCertList()
{
// load the certificates if we have any
var result = new List<X509Certificate>();
Asn1Sequence certs = req.OptionalSignature.Certs;
if (certs != null)
{
foreach (Asn1Encodable ae in certs)
{
if (ae != null && ae.ToAsn1Object() is Asn1Sequence s)
{
result.Add(new X509Certificate(X509CertificateStructure.GetInstance(s)));
}
}
}
return result;
}
public X509Certificate[] GetCerts()
{
if (!this.IsSigned)
return null;
return this.GetCertList().ToArray();
}
/**
* If the request is signed return a possibly empty CertStore containing the certificates in the
* request. If the request is not signed the method returns null.
*
* @return null if not signed, a CertStore otherwise
* @throws OcspException
*/
public IStore<X509Certificate> GetCertificates()
{
if (!this.IsSigned)
return null;
return CollectionUtilities.CreateStore(this.GetCertList());
}
/**
* Return whether or not this request is signed.
*
* @return true if signed false otherwise.
*/
public bool IsSigned
{
get { return req.OptionalSignature != null; }
}
/**
* Verify the signature against the TBSRequest object we contain.
*/
public bool Verify(
AsymmetricKeyParameter publicKey)
{
if (!this.IsSigned)
throw new OcspException("attempt to Verify signature on unsigned object");
try
{
ISigner signature = SignerUtilities.GetSigner(this.SignatureAlgOid);
signature.Init(false, publicKey);
byte[] encoded = req.TbsRequest.GetEncoded();
signature.BlockUpdate(encoded, 0, encoded.Length);
return signature.VerifySignature(this.GetSignature());
}
catch (Exception e)
{
throw new OcspException("exception processing sig: " + e, e);
}
}
/**
* return the ASN.1 encoded representation of this object.
*/
public byte[] GetEncoded()
{
return req.GetEncoded();
}
}
}
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