public static void ExpectedTag_IgnoresConstructed(
AsnEncodingRules ruleSet,
string inputHex,
TagClass tagClass,
int tagValue)
{
Asn1Tag primitiveTag = new Asn1Tag(tagClass, tagValue, false);
Asn1Tag constructedTag = new Asn1Tag(tagClass, tagValue, true);
byte[] inputData = inputHex.HexToByteArray();
AsnReader reader = new AsnReader(inputData, ruleSet);
ShortBacked val1 = reader.ReadEnumeratedValue <ShortBacked>(constructedTag);
Assert.False(reader.HasData);
reader = new AsnReader(inputData, ruleSet);
ShortBacked val2 = reader.ReadEnumeratedValue <ShortBacked>(primitiveTag);
Assert.False(reader.HasData);
Assert.Equal(val1, val2);
reader = new AsnReader(inputData, ruleSet);
ShortBacked val3 = (ShortBacked)reader.ReadEnumeratedValue(typeof(ShortBacked), constructedTag);
Assert.False(reader.HasData);
Assert.Equal(val1, val3);
reader = new AsnReader(inputData, ruleSet);
ShortBacked val4 = (ShortBacked)reader.ReadEnumeratedValue(typeof(ShortBacked), primitiveTag);
Assert.False(reader.HasData);
Assert.Equal(val1, val4);
reader = new AsnReader(inputData, ruleSet);
ReadOnlyMemory <byte> bytes1 = reader.ReadEnumeratedBytes(constructedTag);
Assert.False(reader.HasData);
reader = new AsnReader(inputData, ruleSet);
ReadOnlyMemory <byte> bytes2 = reader.ReadEnumeratedBytes(primitiveTag);
Assert.False(reader.HasData);
Assert.Equal(bytes1.ByteArrayToHex(), bytes2.ByteArrayToHex());
Assert.Equal("FF", bytes1.ByteArrayToHex());
}
public static void TagMustBeCorrect_Custom(PublicEncodingRules ruleSet)
{
byte[] inputData = { 0x87, 2, 0, 0x80 };
AsnReader reader = new AsnReader(inputData, (AsnEncodingRules)ruleSet);
AssertExtensions.Throws <ArgumentException>(
"expectedTag",
() => reader.ReadIntegerBytes(Asn1Tag.Null));
Assert.True(reader.HasData, "HasData after bad universal tag");
Assert.Throws <CryptographicException>(() => reader.ReadIntegerBytes());
Assert.True(reader.HasData, "HasData after default tag");
Assert.Throws <CryptographicException>(() => reader.ReadIntegerBytes(new Asn1Tag(TagClass.Application, 0)));
Assert.True(reader.HasData, "HasData after wrong custom class");
Assert.Throws <CryptographicException>(() => reader.ReadIntegerBytes(new Asn1Tag(TagClass.ContextSpecific, 1)));
Assert.True(reader.HasData, "HasData after wrong custom tag value");
ReadOnlyMemory <byte> value = reader.ReadIntegerBytes(new Asn1Tag(TagClass.ContextSpecific, 7));
Assert.Equal("0080", value.ByteArrayToHex());
Assert.False(reader.HasData, "HasData after reading value");
}
public static void ReadEnumeratedBytes(PublicEncodingRules ruleSet)
{
const string Payload = "0102030405060708090A0B0C0D0E0F10";
// ENUMERATED (payload) followed by INTEGER (0)
byte[] data = ("0A10" + Payload + "020100").HexToByteArray();
AsnReader reader = new AsnReader(data, (AsnEncodingRules)ruleSet);
ReadOnlyMemory <byte> contents = reader.ReadEnumeratedBytes();
Assert.Equal(0x10, contents.Length);
Assert.Equal(Payload, contents.ByteArrayToHex());
}
public static void ReadIntegerBytes()
{
const string Payload = "0102030405060708090A0B0C0D0E0F10";
// INTEGER (payload) followed by INTEGER (0)
byte[] data = ("0210" + Payload + "020100").HexToByteArray();
AsnReader reader = new AsnReader(data, AsnEncodingRules.DER);
ReadOnlyMemory <byte> contents = reader.ReadIntegerBytes();
Assert.Equal(0x10, contents.Length);
Assert.Equal(Payload, contents.ByteArrayToHex());
}
public static void ExpectedTag_IgnoresConstructed(
PublicEncodingRules ruleSet,
string inputHex,
PublicTagClass tagClass,
int tagValue)
{
byte[] inputData = inputHex.HexToByteArray();
AsnReader reader = new AsnReader(inputData, (AsnEncodingRules)ruleSet);
ReadOnlyMemory <byte> val1 = reader.ReadIntegerBytes(new Asn1Tag((TagClass)tagClass, tagValue, true));
Assert.False(reader.HasData);
reader = new AsnReader(inputData, (AsnEncodingRules)ruleSet);
ReadOnlyMemory <byte> val2 = reader.ReadIntegerBytes(new Asn1Tag((TagClass)tagClass, tagValue, false));
Assert.False(reader.HasData);
Assert.Equal(val1.ByteArrayToHex(), val2.ByteArrayToHex());
}
public static void TagMustBeCorrect_Universal(PublicEncodingRules ruleSet)
{
byte[] inputData = { 2, 1, 0x7E };
AsnReader reader = new AsnReader(inputData, (AsnEncodingRules)ruleSet);
AssertExtensions.Throws <ArgumentException>(
"expectedTag",
() => reader.ReadIntegerBytes(Asn1Tag.Null));
Assert.True(reader.HasData, "HasData after bad universal tag");
Assert.Throws <CryptographicException>(() => reader.ReadIntegerBytes(new Asn1Tag(TagClass.ContextSpecific, 0)));
Assert.True(reader.HasData, "HasData after wrong tag");
ReadOnlyMemory <byte> value = reader.ReadIntegerBytes();
Assert.Equal("7E", value.ByteArrayToHex());
Assert.False(reader.HasData, "HasData after read");
}
/// <summary> /// Assert equality by comparing hex string representations /// </summary> /// <param name="expected"></param> /// <param name="actual"></param> public static void HexEqual(ReadOnlyMemory <byte> expected, ReadOnlyMemory <byte> actual) => Assert.Equal(expected.ByteArrayToHex(), actual.ByteArrayToHex());
public static void EncryptDecryptMixBytesAndChars(bool encryptBytes, bool withSpan)
{
Pkcs12SafeContents contents = new Pkcs12SafeContents();
contents.AddSecret(s_zeroOid, s_derNull);
string password = nameof(EncryptDecryptMixBytesAndChars);
Span <byte> passwordUtf8Bytes = stackalloc byte[password.Length];
Encoding.UTF8.GetBytes(password, passwordUtf8Bytes);
Pkcs12Builder builder = new Pkcs12Builder();
if (encryptBytes)
{
builder.AddSafeContentsEncrypted(contents, passwordUtf8Bytes, s_pbkdf2Parameters);
}
else
{
builder.AddSafeContentsEncrypted(contents, password, s_pbkdf2Parameters);
}
builder.SealWithMac(password, HashAlgorithmName.SHA1, 2048);
byte[] encoded = builder.Encode();
Pkcs12Info info = Pkcs12Info.Decode(encoded, out _, skipCopy: true);
Assert.True(info.VerifyMac(password));
ReadOnlyCollection <Pkcs12SafeContents> authSafe = info.AuthenticatedSafe;
Assert.Equal(1, authSafe.Count);
Pkcs12SafeContents readContents = authSafe[0];
Assert.Equal(
Pkcs12ConfidentialityMode.Password,
readContents.ConfidentialityMode);
if (encryptBytes)
{
if (withSpan)
{
readContents.Decrypt(password.AsSpan());
}
else
{
readContents.Decrypt(password);
}
}
else
{
if (withSpan)
{
readContents.Decrypt(passwordUtf8Bytes);
}
else
{
readContents.Decrypt(passwordUtf8Bytes.ToArray());
}
}
Assert.Equal(
Pkcs12ConfidentialityMode.None,
readContents.ConfidentialityMode);
List <Pkcs12SafeBag> bags = readContents.GetBags().ToList();
Assert.Equal(1, bags.Count);
Pkcs12SecretBag secretBag = Assert.IsType <Pkcs12SecretBag>(bags[0]);
Assert.Equal(s_zeroOid.Value, secretBag.GetSecretType().Value);
Assert.Equal(s_derNull.ByteArrayToHex(), secretBag.SecretValue.ByteArrayToHex());
}