66 lines
1.8 KiB
C#
66 lines
1.8 KiB
C#
using System.IO;
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using Org.BouncyCastle.Asn1;
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using Org.BouncyCastle.Asn1.Cms;
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using Org.BouncyCastle.Asn1.X509;
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namespace Org.BouncyCastle.Cms;
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public class CmsEnvelopedData
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{
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internal RecipientInformationStore recipientInfoStore;
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internal ContentInfo contentInfo;
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private AlgorithmIdentifier encAlg;
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private Asn1Set unprotectedAttributes;
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public AlgorithmIdentifier EncryptionAlgorithmID => encAlg;
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public string EncryptionAlgOid => encAlg.Algorithm.Id;
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public ContentInfo ContentInfo => contentInfo;
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public CmsEnvelopedData(byte[] envelopedData)
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: this(CmsUtilities.ReadContentInfo(envelopedData))
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{
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}
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public CmsEnvelopedData(Stream envelopedData)
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: this(CmsUtilities.ReadContentInfo(envelopedData))
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{
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}
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public CmsEnvelopedData(ContentInfo contentInfo)
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{
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this.contentInfo = contentInfo;
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EnvelopedData instance = EnvelopedData.GetInstance(contentInfo.Content);
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Asn1Set recipientInfos = instance.RecipientInfos;
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EncryptedContentInfo encryptedContentInfo = instance.EncryptedContentInfo;
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encAlg = encryptedContentInfo.ContentEncryptionAlgorithm;
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CmsReadable readable = new CmsProcessableByteArray(encryptedContentInfo.EncryptedContent.GetOctets());
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CmsSecureReadable secureReadable = new CmsEnvelopedHelper.CmsEnvelopedSecureReadable(encAlg, readable);
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recipientInfoStore = CmsEnvelopedHelper.BuildRecipientInformationStore(recipientInfos, secureReadable);
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unprotectedAttributes = instance.UnprotectedAttrs;
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}
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public RecipientInformationStore GetRecipientInfos()
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{
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return recipientInfoStore;
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}
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public Org.BouncyCastle.Asn1.Cms.AttributeTable GetUnprotectedAttributes()
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{
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if (unprotectedAttributes == null)
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{
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return null;
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}
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return new Org.BouncyCastle.Asn1.Cms.AttributeTable(unprotectedAttributes);
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}
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public byte[] GetEncoded()
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{
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return contentInfo.GetEncoded();
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}
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}
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