Initial import of old CVS repository
1 files changed, 183 insertions, 0 deletions
diff --git a/crypto/src/x509/X509CertificateParser.cs b/crypto/src/x509/X509CertificateParser.cs
new file mode 100644
index 000000000..8f0e7406c
--- /dev/null
+++ b/crypto/src/x509/X509CertificateParser.cs
@@ -0,0 +1,183 @@
+using System;
+using System.Collections;
+using System.IO;
+using System.Text;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Pkcs;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Security.Certificates;
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Encoders;
+using Org.BouncyCastle.Utilities.IO;
+
+namespace Org.BouncyCastle.X509
+{
+ /**
+ * class for dealing with X509 certificates.
+ * <p>
+ * At the moment this will deal with "-----BEGIN CERTIFICATE-----" to "-----END CERTIFICATE-----"
+ * base 64 encoded certs, as well as the BER binaries of certificates and some classes of PKCS#7
+ * objects.</p>
+ */
+ public class X509CertificateParser
+ {
+ private static readonly PemParser PemCertParser = new PemParser("CERTIFICATE");
+
+ private Asn1Set sData;
+ private int sDataObjectCount;
+ private Stream currentStream;
+
+ private X509Certificate ReadDerCertificate(
+ Asn1InputStream dIn)
+ {
+ Asn1Sequence seq = (Asn1Sequence)dIn.ReadObject();
+
+ if (seq.Count > 1 && seq[0] is DerObjectIdentifier)
+ {
+ if (seq[0].Equals(PkcsObjectIdentifiers.SignedData))
+ {
+ sData = SignedData.GetInstance(
+ Asn1Sequence.GetInstance((Asn1TaggedObject) seq[1], true)).Certificates;
+
+ return GetCertificate();
+ }
+ }
+
+ return CreateX509Certificate(X509CertificateStructure.GetInstance(seq));
+ }
+
+ private X509Certificate GetCertificate()
+ {
+ if (sData != null)
+ {
+ while (sDataObjectCount < sData.Count)
+ {
+ object obj = sData[sDataObjectCount++];
+
+ if (obj is Asn1Sequence)
+ {
+ return CreateX509Certificate(
+ X509CertificateStructure.GetInstance(obj));
+ }
+ }
+ }
+
+ return null;
+ }
+
+ private X509Certificate ReadPemCertificate(
+ Stream inStream)
+ {
+ Asn1Sequence seq = PemCertParser.ReadPemObject(inStream);
+
+ return seq == null
+ ? null
+ : CreateX509Certificate(X509CertificateStructure.GetInstance(seq));
+ }
+
+ protected virtual X509Certificate CreateX509Certificate(
+ X509CertificateStructure c)
+ {
+ return new X509Certificate(c);
+ }
+
+ /// <summary>
+ /// Create loading data from byte array.
+ /// </summary>
+ /// <param name="input"></param>
+ public X509Certificate ReadCertificate(
+ byte[] input)
+ {
+ return ReadCertificate(new MemoryStream(input, false));
+ }
+
+ /// <summary>
+ /// Create loading data from byte array.
+ /// </summary>
+ /// <param name="input"></param>
+ public ICollection ReadCertificates(
+ byte[] input)
+ {
+ return ReadCertificates(new MemoryStream(input, false));
+ }
+
+ /**
+ * Generates a certificate object and initializes it with the data
+ * read from the input stream inStream.
+ */
+ public X509Certificate ReadCertificate(
+ Stream inStream)
+ {
+ if (inStream == null)
+ throw new ArgumentNullException("inStream");
+ if (!inStream.CanRead)
+ throw new ArgumentException("inStream must be read-able", "inStream");
+
+ if (currentStream == null)
+ {
+ currentStream = inStream;
+ sData = null;
+ sDataObjectCount = 0;
+ }
+ else if (currentStream != inStream) // reset if input stream has changed
+ {
+ currentStream = inStream;
+ sData = null;
+ sDataObjectCount = 0;
+ }
+
+ try
+ {
+ if (sData != null)
+ {
+ if (sDataObjectCount != sData.Count)
+ {
+ return GetCertificate();
+ }
+
+ sData = null;
+ sDataObjectCount = 0;
+ return null;
+ }
+
+ PushbackStream pis = new PushbackStream(inStream);
+ int tag = pis.ReadByte();
+
+ if (tag < 0)
+ return null;
+
+ pis.Unread(tag);
+
+ if (tag != 0x30) // assume ascii PEM encoded.
+ {
+ return ReadPemCertificate(pis);
+ }
+
+ return ReadDerCertificate(new Asn1InputStream(pis));
+ }
+ catch (Exception e)
+ {
+ throw new CertificateException("Failed to read certificate", e);
+ }
+ }
+
+ /**
+ * Returns a (possibly empty) collection view of the certificates
+ * read from the given input stream inStream.
+ */
+ public ICollection ReadCertificates(
+ Stream inStream)
+ {
+ X509Certificate cert;
+ IList certs = Platform.CreateArrayList();
+
+ while ((cert = ReadCertificate(inStream)) != null)
+ {
+ certs.Add(cert);
+ }
+
+ return certs;
+ }
+ }
+}
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