/// <summary>
/// This constructor is for required elements only. It allows
/// primitive data to be passed for all primitive elements.
/// It will create new object wrappers for the primitive data
/// and set other elements to references to the given objects.
/// </summary>
public Gost28147_89_EncryptedKey(
byte[] encryptedKey_,
byte[] macKey_
)
: base()
{
encryptedKey = new Gost28147_89_Key(encryptedKey_);
macKey = new Gost28147_89_MAC(macKey_);
}
/// <summary>
/// This constructor is for required elements only. It sets
/// all elements to references to the given objects
/// </summary>
public Gost28147_89_EncryptedKey(
Gost28147_89_Key encryptedKey_,
Gost28147_89_MAC macKey_
)
: base()
{
encryptedKey = encryptedKey_;
macKey = macKey_;
}
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 encryptedKey
if (context.MatchElemTag(Asn1Tag.Universal, Asn1Tag.PRIM, 4, elemLen, false))
{
encryptedKey = new Gost28147_89_Key();
encryptedKey.Decode(buffer, true, elemLen.Value);
}
else
{
throw new Exception("Asn1MissingRequiredException");
}
// decode maskKey
if (context.MatchElemTag(Asn1Tag.CTXT, Asn1Tag.PRIM, 0, elemLen, true))
{
maskKey = new Gost28147_89_Key();
maskKey.Decode(buffer, false, elemLen.Value);
}
// decode macKey
if (context.MatchElemTag(Asn1Tag.Universal, Asn1Tag.PRIM, 4, elemLen, false))
{
macKey = new Gost28147_89_MAC();
macKey.Decode(buffer, true, elemLen.Value);
if (!(macKey.Length == 4))
{
throw new Exception("Asn1ConsVioException");
}
}
else
{
throw new Exception("Asn1MissingRequiredException");
}
}
public void Init()
{
encryptedKey = null;
maskKey = null;
macKey = null;
}
