public static void ExpectedTag_IgnoresConstructed(
PublicEncodingRules ruleSet,
string inputHex,
PublicTagClass tagClass,
int tagValue)
{
byte[] inputData = inputHex.HexToByteArray();
AsnReader reader = new AsnReader(inputData, (AsnEncodingRules)ruleSet);
Assert.True(
reader.TryGetPrimitiveCharacterStringBytes(
new Asn1Tag((TagClass)tagClass, tagValue, true),
UniversalTagNumber.UTF8String,
out ReadOnlyMemory <byte> val1));
Assert.False(reader.HasData);
reader = new AsnReader(inputData, (AsnEncodingRules)ruleSet);
Assert.True(
reader.TryGetPrimitiveCharacterStringBytes(
new Asn1Tag((TagClass)tagClass, tagValue, false),
UniversalTagNumber.UTF8String,
out ReadOnlyMemory <byte> val2));
Assert.False(reader.HasData);
Assert.Equal(val1.ByteArrayToHex(), val2.ByteArrayToHex());
}
public static void TryGetUTF8StringBytes(
PublicEncodingRules ruleSet,
string inputHex,
bool expectSuccess)
{
byte[] inputData = inputHex.HexToByteArray();
AsnReader reader = new AsnReader(inputData, (AsnEncodingRules)ruleSet);
bool got = reader.TryGetPrimitiveCharacterStringBytes(
UniversalTagNumber.UTF8String,
out ReadOnlyMemory <byte> contents);
if (expectSuccess)
{
Assert.True(got, "reader.TryGetUTF8StringBytes");
Assert.True(
Unsafe.AreSame(
ref MemoryMarshal.GetReference(contents.Span),
ref inputData[2]));
}
else
{
Assert.False(got, "reader.TryGetUTF8StringBytes");
Assert.True(contents.IsEmpty, "contents.IsEmpty");
}
}
public static bool TryGetIA5StringBytes(
this AsnReader reader,
out ReadOnlyMemory <byte> contents)
{
return(reader.TryGetPrimitiveCharacterStringBytes(
UniversalTagNumber.IA5String,
out contents));
}
public static bool TryGetBMPStringBytes(
this AsnReader reader,
Asn1Tag expectedTag,
out ReadOnlyMemory <byte> contents)
{
return(reader.TryGetPrimitiveCharacterStringBytes(
expectedTag,
UniversalTagNumber.BMPString,
out contents));
}
public static void TryGetUTF8StringBytes_Throws(
string description,
PublicEncodingRules ruleSet,
string inputHex)
{
byte[] inputData = inputHex.HexToByteArray();
AsnReader reader = new AsnReader(inputData, (AsnEncodingRules)ruleSet);
Assert.Throws <CryptographicException>(
() => reader.TryGetPrimitiveCharacterStringBytes(UniversalTagNumber.UTF8String, out _));
}
public static void TagMustBeCorrect_Universal(PublicEncodingRules ruleSet)
{
byte[] inputData = { 0x0C, 2, (byte)'e', (byte)'l' };
AsnReader reader = new AsnReader(inputData, (AsnEncodingRules)ruleSet);
const UniversalTagNumber EncodingType = UniversalTagNumber.UTF8String;
AssertExtensions.Throws <ArgumentException>(
"expectedTag",
() => reader.TryGetPrimitiveCharacterStringBytes(Asn1Tag.Null, EncodingType, out _));
Assert.True(reader.HasData, "HasData after bad universal tag");
Assert.Throws <CryptographicException>(
() => reader.TryGetPrimitiveCharacterStringBytes(new Asn1Tag(TagClass.ContextSpecific, 0), EncodingType, out _));
Assert.True(reader.HasData, "HasData after wrong tag");
Assert.True(reader.TryGetPrimitiveCharacterStringBytes(EncodingType, out ReadOnlyMemory <byte> value));
Assert.Equal("656C", value.ByteArrayToHex());
Assert.False(reader.HasData, "HasData after read");
}