public override void Decode
(Asn1BerDecodeBuffer buffer, bool explicitTagging, int implicitLength)
{
int llen = (explicitTagging) ?
MatchTag(buffer, Asn1Tag.Sequence) : implicitLength;
Init();
// decode SEQUENCE
Asn1BerDecodeContext context =
new Asn1BerDecodeContext(buffer, llen);
IntHolder elemLen = new IntHolder();
// decode encryptionParamSet
if (context.MatchElemTag(Asn1Tag.Universal, Asn1Tag.PRIM, 6, elemLen, false))
{
encryptionParamSet = new Gost28147_89_ParamSet();
encryptionParamSet.Decode(buffer, true, elemLen.Value);
}
else
{
throw new Exception("Asn1MissingRequiredException (buffer)");
}
// decode ephemeralPublicKey
if (context.MatchElemTag(Asn1Tag.CTXT, Asn1Tag.CONS, 0, elemLen, true))
{
ephemeralPublicKey = new SubjectPublicKeyInfo();
ephemeralPublicKey.Decode(buffer, false, elemLen.Value);
}
// decode ukm
if (context.MatchElemTag(Asn1Tag.Universal, Asn1Tag.PRIM, 4, elemLen, false))
{
ukm = new Asn1OctetString();
ukm.Decode(buffer, true, elemLen.Value);
if (!(ukm.Length == 8))
{
throw new Exception("Asn1ConsVioException (ukm.Length, ukm.Length)");
}
}
else
{
throw new Exception("Asn1MissingRequiredException (buffer)");
}
}
public override void Decode(Asn1BerDecodeBuffer buffer, bool explicitTagging, int implicitLength)
{
var elemLength = explicitTagging ? MatchTag(buffer, Asn1Tag.Sequence) : implicitLength;
EncryptionParamSet = null;
EphemeralPublicKey = null;
Ukm = null;
var context = new Asn1BerDecodeContext(buffer, elemLength);
var parsedLen = new IntHolder();
if (!context.MatchElemTag(0, 0, ObjectIdentifierTypeCode, parsedLen, false))
{
throw ExceptionUtility.CryptographicException(Resources.Asn1MissingRequiredException, buffer.ByteCount);
}
EncryptionParamSet = new Gost_28147_89_ParamSet();
EncryptionParamSet.Decode(buffer, true, parsedLen.Value);
if (context.MatchElemTag(0x80, 0x20, EocTypeCode, parsedLen, true))
{
EphemeralPublicKey = new SubjectPublicKeyInfo();
EphemeralPublicKey.Decode(buffer, false, parsedLen.Value);
}
if (!context.MatchElemTag(0, 0, OctetStringTypeCode, parsedLen, false))
{
throw ExceptionUtility.CryptographicException(Resources.Asn1MissingRequiredException, buffer.ByteCount);
}
Ukm = new Asn1OctetString();
Ukm.Decode(buffer, true, parsedLen.Value);
if (Ukm.Length != 8)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1ConsVioException, nameof(Ukm.Length), Ukm.Length);
}
}