using System; using Org.BouncyCastle.Asn1.X509; namespace Org.BouncyCastle.Asn1.Cmp { /* *
     * KemOtherInfo ::= SEQUENCE {
     *   staticString      PKIFreeText,  -- MUST be "CMP-KEM"
     *   transactionID [0] OCTET STRING     OPTIONAL,
     *   senderNonce   [1] OCTET STRING     OPTIONAL,
     *   recipNonce    [2] OCTET STRING     OPTIONAL,
     *   len               INTEGER (1..MAX),
     *   mac               AlgorithmIdentifier{MAC-ALGORITHM, {...}}
     *   ct                OCTET STRING
     * }
     * 
*/ public class KemOtherInfo : Asn1Encodable { public static KemOtherInfo GetInstance(object obj) { if (obj == null) return null; if (obj is KemOtherInfo kemOtherInfo) return kemOtherInfo; return new KemOtherInfo(Asn1Sequence.GetInstance(obj)); } public static KemOtherInfo GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit) => new KemOtherInfo(Asn1Sequence.GetInstance(taggedObject, declaredExplicit)); private static readonly PkiFreeText DEFAULT_staticString = new PkiFreeText("CMP-KEM"); private readonly PkiFreeText m_staticString; private readonly Asn1OctetString m_transactionID; private readonly Asn1OctetString m_senderNonce; private readonly Asn1OctetString m_recipNonce; private readonly DerInteger m_len; private readonly AlgorithmIdentifier m_mac; private readonly Asn1OctetString m_ct; public KemOtherInfo(Asn1OctetString transactionID, Asn1OctetString senderNonce, Asn1OctetString recipNonce, DerInteger len, AlgorithmIdentifier mac, Asn1OctetString ct) { m_staticString = DEFAULT_staticString; m_transactionID = transactionID; m_senderNonce = senderNonce; m_recipNonce = recipNonce; m_len = len; m_mac = mac; m_ct = ct; } public KemOtherInfo(Asn1OctetString transactionID, Asn1OctetString senderNonce, Asn1OctetString recipNonce, long len, AlgorithmIdentifier mac, Asn1OctetString ct) : this(transactionID, senderNonce, recipNonce, new DerInteger(len), mac, ct) { } private KemOtherInfo(Asn1Sequence seq) { if (seq.Count < 4 || seq.Count > 7) throw new ArgumentException("sequence size should be between 4 and 7 inclusive", nameof(seq)); int seqPos = 0; m_staticString = PkiFreeText.GetInstance(seq[seqPos]); if (!DEFAULT_staticString.Equals(m_staticString)) throw new ArgumentException("staticString field should be " + DEFAULT_staticString); Asn1TaggedObject tagged = seq[++seqPos] as Asn1TaggedObject; if (tagged != null && Asn1Utilities.TryGetContextBaseUniversal(tagged, 0, true, Asn1Tags.OctetString, out var transactionID)) { m_transactionID = (Asn1OctetString)transactionID; tagged = seq[++seqPos] as Asn1TaggedObject; } if (tagged != null && Asn1Utilities.TryGetContextBaseUniversal(tagged, 1, true, Asn1Tags.OctetString, out var senderNonce)) { m_senderNonce = (Asn1OctetString)senderNonce; tagged = seq[++seqPos] as Asn1TaggedObject; } if (tagged != null && Asn1Utilities.TryGetContextBaseUniversal(tagged, 2, true, Asn1Tags.OctetString, out var recipNonce)) { m_recipNonce = (Asn1OctetString)recipNonce; tagged = seq[++seqPos] as Asn1TaggedObject; } if (tagged != null) throw new ArgumentException("unknown tag: " + Asn1Utilities.GetTagText(tagged)); m_len = DerInteger.GetInstance(seq[seqPos]); m_mac = AlgorithmIdentifier.GetInstance(seq[++seqPos]); m_ct = Asn1OctetString.GetInstance(seq[++seqPos]); if (++seqPos != seq.Count) throw new ArgumentException("unexpected data at end of sequence", nameof(seq)); } public virtual Asn1OctetString TransactionID => m_transactionID; public virtual Asn1OctetString SenderNonce => m_senderNonce; public virtual Asn1OctetString RecipNonce => m_recipNonce; public virtual DerInteger Len => m_len; public virtual AlgorithmIdentifier Mac => m_mac; public virtual Asn1OctetString Ct => m_ct; /** *
         * KemOtherInfo ::= SEQUENCE {
         *   staticString      PKIFreeText,   -- MUST be "CMP-KEM"
         *   transactionID [0] OCTET STRING     OPTIONAL,
         *   senderNonce   [1] OCTET STRING     OPTIONAL,
         *   recipNonce    [2] OCTET STRING     OPTIONAL,
         *   len               INTEGER (1..MAX),
         *   mac               AlgorithmIdentifier{MAC-ALGORITHM, {...}}
         *   ct                OCTET STRING
         * }
         * 
* * @return a basic ASN.1 object representation. */ public override Asn1Object ToAsn1Object() { Asn1EncodableVector v = new Asn1EncodableVector(7); v.Add(m_staticString); v.AddOptionalTagged(true, 0, m_transactionID); v.AddOptionalTagged(true, 1, m_senderNonce); v.AddOptionalTagged(true, 2, m_recipNonce); v.Add(m_len); v.Add(m_mac); v.Add(m_ct); return new DerSequence(v); } } }