init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Cms/CmsAuthEnvelopedData.cs

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+using System.IO;
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Cms;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Crypto.Parameters;
+
+namespace Org.BouncyCastle.Cms;
+
+internal class CmsAuthEnvelopedData
+{
+	private class AuthEnvelopedSecureReadable : CmsSecureReadable
+	{
+		private readonly CmsAuthEnvelopedData parent;
+
+		public AlgorithmIdentifier Algorithm => parent.authEncAlg;
+
+		public object CryptoObject => null;
+
+		internal AuthEnvelopedSecureReadable(CmsAuthEnvelopedData parent)
+		{
+			this.parent = parent;
+		}
+
+		public CmsReadable GetReadable(KeyParameter key)
+		{
+			throw new CmsException("AuthEnveloped data decryption not yet implemented");
+		}
+	}
+
+	internal RecipientInformationStore recipientInfoStore;
+
+	internal ContentInfo contentInfo;
+
+	private OriginatorInfo originator;
+
+	private AlgorithmIdentifier authEncAlg;
+
+	private Asn1Set authAttrs;
+
+	private byte[] mac;
+
+	private Asn1Set unauthAttrs;
+
+	public CmsAuthEnvelopedData(byte[] authEnvData)
+		: this(CmsUtilities.ReadContentInfo(authEnvData))
+	{
+	}
+
+	public CmsAuthEnvelopedData(Stream authEnvData)
+		: this(CmsUtilities.ReadContentInfo(authEnvData))
+	{
+	}
+
+	public CmsAuthEnvelopedData(ContentInfo contentInfo)
+	{
+		this.contentInfo = contentInfo;
+		AuthEnvelopedData instance = AuthEnvelopedData.GetInstance(contentInfo.Content);
+		originator = instance.OriginatorInfo;
+		Asn1Set recipientInfos = instance.RecipientInfos;
+		EncryptedContentInfo authEncryptedContentInfo = instance.AuthEncryptedContentInfo;
+		authEncAlg = authEncryptedContentInfo.ContentEncryptionAlgorithm;
+		CmsSecureReadable secureReadable = new AuthEnvelopedSecureReadable(this);
+		recipientInfoStore = CmsEnvelopedHelper.BuildRecipientInformationStore(recipientInfos, secureReadable);
+		authAttrs = instance.AuthAttrs;
+		mac = instance.Mac.GetOctets();
+		unauthAttrs = instance.UnauthAttrs;
+	}
+}