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88 lines
3.0 KiB
88 lines
3.0 KiB
1 year ago
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
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#pragma warning disable
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using System;
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using System.IO;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.Cms;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.X509;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Security;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.X509;
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Cms
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{
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public class KeyTransRecipientInfoGenerator : RecipientInfoGenerator
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{
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private static readonly CmsEnvelopedHelper Helper = CmsEnvelopedHelper.Instance;
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private Asn1OctetString subjectKeyIdentifier;
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private IKeyWrapper keyWrapper;
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// Derived fields
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private SubjectPublicKeyInfo info;
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private IssuerAndSerialNumber issuerAndSerialNumber;
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private SecureRandom random;
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public KeyTransRecipientInfoGenerator(X509Certificate recipCert, IKeyWrapper keyWrapper)
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: this(new Asn1.Cms.IssuerAndSerialNumber(recipCert.IssuerDN, new DerInteger(recipCert.SerialNumber)), keyWrapper)
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{
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}
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public KeyTransRecipientInfoGenerator(IssuerAndSerialNumber issuerAndSerial, IKeyWrapper keyWrapper)
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{
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this.issuerAndSerialNumber = issuerAndSerial;
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this.keyWrapper = keyWrapper;
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}
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public KeyTransRecipientInfoGenerator(byte[] subjectKeyID, IKeyWrapper keyWrapper)
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{
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this.subjectKeyIdentifier = new DerOctetString(subjectKeyIdentifier);
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this.keyWrapper = keyWrapper;
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}
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public RecipientInfo Generate(KeyParameter contentEncryptionKey, SecureRandom random)
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{
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AlgorithmIdentifier keyEncryptionAlgorithm = this.AlgorithmDetails;
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this.random = random;
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byte[] encryptedKeyBytes = GenerateWrappedKey(contentEncryptionKey);
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RecipientIdentifier recipId;
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if (issuerAndSerialNumber != null)
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{
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recipId = new RecipientIdentifier(issuerAndSerialNumber);
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}
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else
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{
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recipId = new RecipientIdentifier(subjectKeyIdentifier);
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}
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return new RecipientInfo(new KeyTransRecipientInfo(recipId, keyEncryptionAlgorithm,
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new DerOctetString(encryptedKeyBytes)));
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}
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protected virtual AlgorithmIdentifier AlgorithmDetails
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{
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get
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{
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if (this.keyWrapper != null)
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{
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return (AlgorithmIdentifier)keyWrapper.AlgorithmDetails;
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}
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return info.AlgorithmID;
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}
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}
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protected virtual byte[] GenerateWrappedKey(KeyParameter contentEncryptionKey)
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{
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return keyWrapper.Wrap(contentEncryptionKey.GetKey()).Collect();
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}
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}
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}
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#pragma warning restore
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#endif
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