public void VerifyDerDecodeSequenceOfErrorCases()
{
// for reference, the valid SequenceOf DER block is: new byte[] { 0x30, 0x34, 0x1e, 0x26, 0x00, 0x56, 0x00, 0x61, 0x00, 0x6c, 0x00, 0x69, 0x00, 0x64, 0x00, 0x69, 0x00, 0x74, 0x00, 0x79, 0x00, 0x50, 0x00, 0x65, 0x00, 0x72, 0x00, 0x69, 0x00, 0x6f, 0x00, 0x64, 0x00, 0x55, 0x00, 0x6e, 0x00, 0x69, 0x00, 0x74, 0x00, 0x73, 0x1e, 0x0a, 0x00, 0x57, 0x00, 0x65, 0x00, 0x65, 0x00, 0x6b, 0x00, 0x73 }
var testCases = new[] {
new { test = new byte[] { 0x30, 0x35, 0x1e, 0x26, 0x00, 0x56, 0x00, 0x61, 0x00, 0x6c, 0x00, 0x69, 0x00, 0x64, 0x00, 0x69, 0x00, 0x74, 0x00, 0x79, 0x00, 0x50, 0x00, 0x65, 0x00, 0x72, 0x00, 0x69, 0x00, 0x6f, 0x00, 0x64, 0x00, 0x55, 0x00, 0x6e, 0x00, 0x69, 0x00, 0x74, 0x00, 0x73, 0x1e, 0x0a, 0x00, 0x57, 0x00, 0x65, 0x00, 0x65, 0x00, 0x6b, 0x00, 0x73 },
description = "SequenceOf length too large" },
new { test = new byte[] { 0x30, 0x33, 0x1e, 0x26, 0x00, 0x56, 0x00, 0x61, 0x00, 0x6c, 0x00, 0x69, 0x00, 0x64, 0x00, 0x69, 0x00, 0x74, 0x00, 0x79, 0x00, 0x50, 0x00, 0x65, 0x00, 0x72, 0x00, 0x69, 0x00, 0x6f, 0x00, 0x64, 0x00, 0x55, 0x00, 0x6e, 0x00, 0x69, 0x00, 0x74, 0x00, 0x73, 0x1e, 0x0a, 0x00, 0x57, 0x00, 0x65, 0x00, 0x65, 0x00, 0x6b, 0x00, 0x73 },
description = "SequenceOf length too small" },
new { test = new byte[] { 0x30 },
description = "incomplete header" },
new { test = new byte[] { 0x15, 0x34, 0x1e, 0x26, 0x00, 0x56, 0x00, 0x61, 0x00, 0x6c, 0x00, 0x69, 0x00, 0x64, 0x00, 0x69, 0x00, 0x74, 0x00, 0x79, 0x00, 0x50, 0x00, 0x65, 0x00, 0x72, 0x00, 0x69, 0x00, 0x6f, 0x00, 0x64, 0x00, 0x55, 0x00, 0x6e, 0x00, 0x69, 0x00, 0x74, 0x00, 0x73, 0x1e, 0x0a, 0x00, 0x57, 0x00, 0x65, 0x00, 0x65, 0x00, 0x6b, 0x00, 0x73 },
description = "wrong tag" },
new { test = (byte[])null,
description = "null input" },
new { test = new byte[] { 0x30, 0x34, 0x1e, 0x26, 0x00, 0x56, 0x00, 0x61, 0x00, 0x6c, 0x00, 0x69, 0x00, 0x64, 0x00, 0x69, 0x00, 0x74, 0x00, 0x79, 0x00, 0x50, 0x00, 0x65, 0x00, 0x72, 0x00, 0x69, 0x00, 0x6f, 0x00, 0x64, 0x00, 0x55, 0x00, 0x6e, 0x00, 0x69, 0x00, 0x74, 0x00, 0x73, 0x1e, 0x0a, 0x00, 0x57, 0x00, 0x65, 0x00, 0x65, 0x00, 0x6b, 0x00 },
description = "entry has length too large" },
new { test = new byte[] { 0x30, 0x34, 0x1e, 0x26, 0x00, 0x56, 0x00, 0x61, 0x00, 0x6c, 0x00, 0x69, 0x00, 0x64, 0x00, 0x69, 0x00, 0x74, 0x00, 0x79, 0x00, 0x50, 0x00, 0x65, 0x00, 0x72, 0x00, 0x69, 0x00, 0x6f, 0x00, 0x64, 0x00, 0x55, 0x00, 0x6e, 0x00, 0x69, 0x00, 0x74, 0x00, 0x73, 0x1e, 0x0a, 0x00, 0x57, 0x00, 0x65, 0x00, 0x65, 0x00, 0x6b, 0x00, 0x73, 0x73 },
description = "entry has length too small" },
};
foreach (var testCase in testCases)
{
bool caught = false;
try
{
DerUtils.DecodeSequenceOf(testCase.test);
}
catch (Exception)
{
caught = true;
}
Assert.IsTrue(caught, "excected an error, but none caught on test: " + testCase.description);
}
}
public void VerifyDerSequenceOfRoundTrip()
{
var testCases = new[] {
new { entryData = new List <string>()
{
"data1"
}, description = "single entry" },
new { entryData = new List <string>()
{
"data1", "data2", "data3"
}, description = "multiple entries" },
new { entryData = new List <string>()
{
}, description = "no entries" },
};
foreach (var testCase in testCases)
{
// convert the input data from strings to der encoding, since that's the expected input format
List <byte[]> derEntries = new List <byte[]>();
foreach (string entry in testCase.entryData)
{
derEntries.Add(DerUtils.EncodePrintableString(entry));
}
List <byte[]> outputEntries = DerUtils.DecodeSequenceOf(DerUtils.EncodeSequenceOf(derEntries));
// verify the output matches the input
Assert.AreEqual(testCase.entryData.Count, outputEntries.Count, "number of output entries should match the number of input entries for test case: " + testCase.description);
for (int i = 0; i < outputEntries.Count; i++)
{
Assert.AreEqual(testCase.entryData[i], DerUtils.DecodeString(outputEntries[i]), "Output data should match input data for test case: " + testCase.description);
}
}
}