public static void WriteByteString_IndefiniteLength_ImbalancedWrites_ShouldThrowInvalidOperationException(string opName)
{
var writer = new CborWriter();
writer.WriteStartIndefiniteLengthByteString();
Assert.Throws <InvalidOperationException>(() => Helpers.ExecOperation(writer, opName));
}
public static void ExecOperation(CborWriter writer, string op)
{
switch (op)
{
case nameof(writer.WriteInt64): writer.WriteInt64(42); break;
case nameof(writer.WriteByteString): writer.WriteByteString(Array.Empty <byte>()); break;
case nameof(writer.WriteTextString): writer.WriteTextString(""); break;
case nameof(writer.WriteStartIndefiniteLengthTextString): writer.WriteStartIndefiniteLengthTextString(); break;
case nameof(writer.WriteStartIndefiniteLengthByteString): writer.WriteStartIndefiniteLengthByteString(); break;
case nameof(writer.WriteStartArray): writer.WriteStartArray(null); break;
case nameof(writer.WriteStartMap): writer.WriteStartMap(null); break;
case nameof(writer.WriteEndIndefiniteLengthByteString): writer.WriteEndIndefiniteLengthByteString(); break;
case nameof(writer.WriteEndIndefiniteLengthTextString): writer.WriteEndIndefiniteLengthTextString(); break;
case nameof(writer.WriteEndArray): writer.WriteEndArray(); break;
case nameof(writer.WriteEndMap): writer.WriteEndMap(); break;
default: throw new Exception($"Unrecognized CborWriter operation name {op}");
}
}
public static void WriteChunkedByteString(CborWriter writer, byte[][] chunks)
{
writer.WriteStartIndefiniteLengthByteString();
foreach (byte[] chunk in chunks)
{
writer.WriteByteString(chunk);
}
writer.WriteEndIndefiniteLengthByteString();
}
public static void WriteEncodedValue_IndefiniteLengthByteString_HappyPath()
{
var writer = new CborWriter(convertIndefiniteLengthEncodings: false);
writer.WriteStartIndefiniteLengthByteString();
writer.WriteByteString(new byte[] { 1, 1, 1 });
writer.WriteEncodedValue("43020202".HexToByteArray());
writer.WriteEndIndefiniteLengthByteString();
byte[] encoding = writer.Encode();
Assert.Equal("5f4301010143020202ff", encoding.ByteArrayToHex().ToLower());
}
public static void Roundtrip_IndefiniteByteString(CborConformanceMode mode, byte[][] chunks)
{
bool convertIndefiniteLengthEncodings = mode is CborConformanceMode.Canonical or CborConformanceMode.Ctap2Canonical;
var writer = new CborWriter(convertIndefiniteLengthEncodings: convertIndefiniteLengthEncodings);
writer.WriteStartIndefiniteLengthByteString();
foreach (byte[] chunk in chunks)
{
writer.WriteByteString(chunk);
}
writer.WriteEndIndefiniteLengthByteString();
byte[] encoding = writer.Encode();
var reader = new CborReader(encoding);
byte[] expected = chunks.SelectMany(ch => ch).ToArray();
byte[] result = reader.ReadByteString();
AssertHelper.HexEqual(expected, result);
}
public void GetValueAsBytesBeingIndefiniteLengthSucceeds(ContentTestCase @case)
{
Verify(0);
Verify(1);
Verify(10);
void Verify(int repetitions)
{
byte[] content = GetDummyContent(@case);
var writer = new CborWriter();
writer.WriteStartIndefiniteLengthByteString();
for (int i = 0; i < repetitions; i++)
{
writer.WriteByteString(content);
}
writer.WriteEndIndefiniteLengthByteString();
int expectedLength = content.Length * repetitions;
CoseHeaderValue headerValue = CoseHeaderValue.FromEncodedValue(writer.Encode());
ReadOnlySpan <byte> result = headerValue.GetValueAsBytes();
Assert.Equal(expectedLength, result.Length);
for (int i = 0; i < expectedLength; i += content.Length)
{
AssertExtensions.SequenceEqual(content, result.Slice(i, content.Length));
}
Span <byte> buffer = new byte[expectedLength];
int length = headerValue.GetValueAsBytes(buffer);
Assert.Equal(expectedLength, length);
for (int i = 0; i < expectedLength; i += content.Length)
{
AssertExtensions.SequenceEqual(content, buffer.Slice(i, content.Length));
}
}
}
public static void WriteStartByteStringIndefiniteLength_NoPatching_UnsupportedConformance_ShouldThrowInvalidOperationException(CborConformanceMode conformanceMode)
{
var writer = new CborWriter(conformanceMode, convertIndefiniteLengthEncodings: false);
Assert.Throws <InvalidOperationException>(() => writer.WriteStartIndefiniteLengthByteString());
}