public static void WriteMap_DuplicateKeys_StrictConformance_ShouldBeRecoverableError(CborConformanceMode mode, object dupeKey)
{
byte[] expected = PerformWrite(attemptDuplicateWrite: false);
byte[] actual = PerformWrite(attemptDuplicateWrite: true);
Assert.Equal(expected.ByteArrayToHex(), actual.ByteArrayToHex());
byte[] PerformWrite(bool attemptDuplicateWrite)
{
var writer = new CborWriter(mode);
writer.WriteStartMap(2);
Helpers.WriteValue(writer, dupeKey);
writer.WriteInt32(0);
if (attemptDuplicateWrite)
{
Assert.Throws <InvalidOperationException>(() => Helpers.WriteValue(writer, dupeKey));
}
// wrap dupe key in an array to satisfy key sorting & uniqueness constraints
Helpers.WriteValue(writer, new object[] { dupeKey });
writer.WriteInt32(0);
writer.WriteEndMap();
return(writer.Encode());
}
}
public void VerifyThrowsIfIncorrectIntegerAlgorithm(int incorrectAlg)
{
CoseSigner signer = GetCoseSigner(DefaultKey, DefaultHash);
// Template header
signer.ProtectedHeaders.Add(new CoseHeaderLabel(42), 42);
string hexTemplateHeaders = "47A20126182A182A";
string hexCborMessage = Sign(s_sampleContent, signer).ByteArrayToHex();
// Creaft a encoded protected map that replaces the "Template value" map.
var writer = new CborWriter();
writer.WriteStartMap(1);
writer.WriteInt32(1);
writer.WriteInt32(incorrectAlg);
writer.WriteEndMap();
byte[] newMap = writer.Encode();
writer.Reset();
writer.WriteByteString(newMap);
string hexNewMap = writer.Encode().ByteArrayToHex();
hexCborMessage = ReplaceFirst(hexCborMessage, hexTemplateHeaders, hexNewMap);
CoseMessage msg = Decode(ByteUtils.HexToByteArray(hexCborMessage));
Assert.Throws <CryptographicException>(() => Verify(msg, DefaultKey, s_sampleContent));
}
public static void WriteInt32_SingleValue_HappyPath(int input, string hexExpectedEncoding)
{
byte[] expectedEncoding = hexExpectedEncoding.HexToByteArray();
using var writer = new CborWriter();
writer.WriteInt32(input);
AssertHelper.HexEqual(expectedEncoding, writer.GetEncoding());
}
public static CoseHeaderValue FromInt32(int value)
{
var writer = new CborWriter();
writer.WriteInt32(value);
return(FromEncodedValue(Encode(writer)));
}
public static void WriteMap_DuplicateKeys_StrictConformance_ShouldFail(CborConformanceLevel level, object dupeKey)
{
using var writer = new CborWriter(level);
writer.WriteStartMap(2);
Helpers.WriteValue(writer, dupeKey);
writer.WriteInt32(0);
Assert.Throws <InvalidOperationException>(() => Helpers.WriteValue(writer, dupeKey));
}
public static void WriteValue(CborWriter writer, object value, bool useDefiniteLengthCollections = true)
{
switch (value)
{
case null: writer.WriteNull(); break;
case bool b: writer.WriteBoolean(b); break;
case int i: writer.WriteInt32(i); break;
case long i: writer.WriteInt64(i); break;
case ulong i: writer.WriteUInt64(i); break;
case float f: writer.WriteSingle(f); break;
case double d: writer.WriteDouble(d); break;
case decimal d: writer.WriteDecimal(d); break;
case string s: writer.WriteTextString(s); break;
case BigInteger i: writer.WriteBigInteger(i); break;
case DateTimeOffset d: writer.WriteDateTimeOffset(d); break;
case byte[] b: writer.WriteByteString(b); break;
case byte[][] chunks: WriteChunkedByteString(writer, chunks); break;
case string[] chunks when IsIndefiniteLengthByteString(chunks):
byte[][] byteChunks = chunks.Skip(1).Select(ch => ch.HexToByteArray()).ToArray();
WriteChunkedByteString(writer, byteChunks);
break;
case string[] chunks: WriteChunkedTextString(writer, chunks); break;
case object[] nested when IsCborMapRepresentation(nested): WriteMap(writer, nested, useDefiniteLengthCollections); break;
case object[] nested when IsEncodedValueRepresentation(nested):
byte[] encodedValue = ((string)nested[1]).HexToByteArray();
writer.WriteEncodedValue(encodedValue);
break;
case object[] nested when IsTaggedValueRepresentation(nested):
writer.WriteTag((CborTag)nested[0]);
WriteValue(writer, nested[1]);
break;
case object[] nested: WriteArray(writer, nested, useDefiniteLengthCollections); break;
default: throw new ArgumentException($"Unrecognized argument type {value.GetType()}");
}
;
}
public void WriteDiscriminator(ref CborWriter writer, Type actualType)
{
if (!_discriminatorsByType.TryGetValue(actualType, out int discriminator))
{
throw new CborException($"Unknown discriminator for type: {actualType}");
}
writer.WriteInt32(discriminator);
}
public void GetValueAsInt32Succeeds(int value)
{
var writer = new CborWriter();
writer.WriteInt32(value);
CoseHeaderValue headerValue = CoseHeaderValue.FromEncodedValue(writer.Encode());
Assert.Equal(value, headerValue.GetValueAsInt32());
}
public static void Reset_NonTrivialWriter_HappyPath()
{
// Set up: build a nontrivial writer state.
// Favor maps and Ctap2 canonicalization since
// since that utilizes most of the moving parts.
var writer = new CborWriter(conformanceMode: CborConformanceMode.Ctap2Canonical);
for (int i = 0; i < 10; i++)
{
if (i % 2 == 0)
{
writer.WriteStartMap(100);
}
else
{
writer.WriteStartArray(100);
}
}
writer.WriteStartMap(3);
writer.WriteInt32(1); // key
writer.WriteInt32(2); // value
writer.WriteInt32(-1); // key
writer.WriteInt32(1); // value
// End set up
Assert.Equal(11, writer.CurrentDepth);
Assert.True(writer.BytesWritten > 11, "must have written a nontrivial number of bytes to the buffer");
writer.Reset();
Assert.Equal(0, writer.CurrentDepth);
Assert.Equal(0, writer.BytesWritten);
// Write an object from scratch and validate that it is correct
writer.WriteInt32(42);
Assert.Equal(new byte[] { 0x18, 0x2a }, writer.Encode());
}
public void FromInt32Succeeds(int value)
{
var writer = new CborWriter();
writer.WriteInt32(value);
CoseHeaderValue headerValue = CoseHeaderValue.FromInt32(value);
AssertExtensions.SequenceEqual(writer.Encode(), headerValue.EncodedValue.Span);
Assert.Equal(value, headerValue.GetValueAsInt32());
}
private static void WriteECParametersAsCosePublicKey(CborWriter writer, ECParameters ecParams, HashAlgorithmName?algorithmName)
{
Debug.Assert(writer.ConformanceMode == CborConformanceMode.Ctap2Canonical && writer.ConvertIndefiniteLengthEncodings);
if (ecParams.Q.X is null || ecParams.Q.Y is null)
{
throw new ArgumentException("does not specify a public key point.", nameof(ecParams));
}
// run these first to perform necessary validation
(CoseKeyType kty, CoseCrvId crv) = MapECCurveToCoseKtyAndCrv(ecParams.Curve);
CoseKeyAlgorithm?alg = (algorithmName != null) ? MapHashAlgorithmNameToCoseKeyAlg(algorithmName.Value) : (CoseKeyAlgorithm?)null;
// Begin writing a CBOR object
writer.WriteStartMap(definiteLength: null);
// NB labels should be sorted according to CTAP2 canonical encoding rules.
// While the CborWriter will attempt to sort the encodings on its own,
// it is generally more efficient if keys are written in sorted order to begin with.
WriteCoseKeyLabel(writer, CoseKeyLabel.Kty);
writer.WriteInt32((int)kty);
if (alg != null)
{
WriteCoseKeyLabel(writer, CoseKeyLabel.Alg);
writer.WriteInt32((int)alg);
}
WriteCoseKeyLabel(writer, CoseKeyLabel.EcCrv);
writer.WriteInt32((int)crv);
WriteCoseKeyLabel(writer, CoseKeyLabel.EcX);
writer.WriteByteString(ecParams.Q.X);
WriteCoseKeyLabel(writer, CoseKeyLabel.EcY);
writer.WriteByteString(ecParams.Q.Y);
writer.WriteEndMap();
static void WriteCoseKeyLabel(CborWriter writer, CoseKeyLabel label)
{
writer.WriteInt32((int)label);
}
public override void Write(ref CborWriter writer, int value)
{
writer.WriteInt32(value);
}
static ReadOnlyMemory <byte> EncodeInt32(int value, CborWriter writer)
{
writer.WriteInt32(value);
return(EncodeAndReset(writer));
}