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Basic formatting applied. Unnecessary comments have been removed. Suspicious code is covered by TODO.
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using GostCryptography.Asn1.Ber;
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using GostCryptography.Properties;
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namespace GostCryptography.Asn1.Gost.Gost_R3410
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{
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public abstract class Gost_R3410_PublicKeyParams : Asn1Type
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{
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public Asn1ObjectIdentifier PublicKeyParamSet { get; set; }
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public Asn1ObjectIdentifier DigestParamSet { get; set; }
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public Asn1ObjectIdentifier EncryptionParamSet { get; set; }
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public override void Decode(Asn1BerDecodeBuffer buffer, bool explicitTagging, int implicitLength)
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{
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var elemLength = explicitTagging ? MatchTag(buffer, Asn1Tag.Sequence) : implicitLength;
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PublicKeyParamSet = null;
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DigestParamSet = null;
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EncryptionParamSet = null;
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var context = new Asn1BerDecodeContext(buffer, elemLength);
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var parsedLen = new IntHolder();
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if (context.MatchElemTag(0, 0, ObjectIdentifierTypeCode, parsedLen, false))
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{
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PublicKeyParamSet = new Asn1ObjectIdentifier();
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PublicKeyParamSet.Decode(buffer, true, parsedLen.Value);
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}
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else
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{
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throw ExceptionUtility.CryptographicException(Resources.Asn1MissingRequiredException, buffer.ByteCount);
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}
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if (context.MatchElemTag(0, 0, ObjectIdentifierTypeCode, parsedLen, false))
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{
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DigestParamSet = new Asn1ObjectIdentifier();
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DigestParamSet.Decode(buffer, true, parsedLen.Value);
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}
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if (context.MatchElemTag(0, 0, ObjectIdentifierTypeCode, parsedLen, false))
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{
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EncryptionParamSet = new Asn1ObjectIdentifier();
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EncryptionParamSet.Decode(buffer, true, parsedLen.Value);
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}
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if (!context.Expired())
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{
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var lastTag = buffer.PeekTag();
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if (lastTag.Equals(0, 0, ObjectIdentifierTypeCode))
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{
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throw ExceptionUtility.CryptographicException(Resources.Asn1SeqOrderException);
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}
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}
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}
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public override int Encode(Asn1BerEncodeBuffer buffer, bool explicitTagging)
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{
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var len = 0;
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if (EncryptionParamSet != null)
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{
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len += EncryptionParamSet.Encode(buffer, true);
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}
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if (DigestParamSet != null)
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{
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len += DigestParamSet.Encode(buffer, true);
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}
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len += PublicKeyParamSet.Encode(buffer, true);
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if (explicitTagging)
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{
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len += buffer.EncodeTagAndLength(Asn1Tag.Sequence, len);
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}
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return len;
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}
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}
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}
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