internal override bool TryExportPublicKey(
ReadOnlySpan <byte> publicKeyBytes,
KeyBlobFormat format,
Span <byte> blob,
out int blobSize)
{
switch (format)
{
case KeyBlobFormat.RawPublicKey:
return(s_rawPublicKeyFormatter.TryExport(publicKeyBytes, blob, out blobSize));
case KeyBlobFormat.NSecPublicKey:
return(s_nsecPublicKeyFormatter.TryExport(publicKeyBytes, blob, out blobSize));
case KeyBlobFormat.PkixPublicKey:
return(s_pkixPublicKeyFormatter.TryExport(publicKeyBytes, blob, out blobSize));
case KeyBlobFormat.PkixPublicKeyText:
return(s_pkixPublicKeyFormatter.TryExportText(publicKeyBytes, blob, out blobSize));
default:
throw Error.Argument_FormatNotSupported(nameof(format), format.ToString());
}
}
internal override bool TryImportKey(
ReadOnlySpan <byte> blob,
KeyBlobFormat format,
out SecureMemoryHandle keyHandle,
out byte[] publicKeyBytes)
{
switch (format)
{
case KeyBlobFormat.RawPrivateKey:
return(s_rawPrivateKeyFormatter.TryImport(blob, out keyHandle, out publicKeyBytes));
case KeyBlobFormat.NSecPrivateKey:
return(s_nsecPrivateKeyFormatter.TryImport(blob, out keyHandle, out publicKeyBytes));
case KeyBlobFormat.PkixPrivateKey:
return(s_pkixPrivateKeyFormatter.TryImport(blob, out keyHandle, out publicKeyBytes));
case KeyBlobFormat.PkixPrivateKeyText:
return(s_pkixPrivateKeyFormatter.TryImportText(blob, out keyHandle, out publicKeyBytes));
default:
throw Error.Argument_FormatNotSupported(nameof(format), format.ToString());
}
}
internal override bool TryExportKey(
SecureMemoryHandle keyHandle,
KeyBlobFormat format,
Span <byte> blob,
out int blobSize)
{
switch (format)
{
case KeyBlobFormat.RawPrivateKey:
return(s_rawPrivateKeyFormatter.TryExport(keyHandle, blob, out blobSize));
case KeyBlobFormat.NSecPrivateKey:
return(s_nsecPrivateKeyFormatter.TryExport(keyHandle, blob, out blobSize));
case KeyBlobFormat.PkixPrivateKey:
return(s_pkixPrivateKeyFormatter.TryExport(keyHandle, blob, out blobSize));
case KeyBlobFormat.PkixPrivateKeyText:
return(s_pkixPrivateKeyFormatter.TryExportText(keyHandle, blob, out blobSize));
default:
throw Error.Argument_FormatNotSupported(nameof(format), format.ToString());
}
}
private static void Test(Algorithm a, int seedSize, KeyBlobFormat importFormat, int keySize, int outputSize, KeyBlobFormat format, byte[] blobHeader)
{
var b = Utilities.RandomBytes.Slice(0, seedSize);
using (var k = Key.Import(a, b, importFormat, new KeyCreationParameters {
ExportPolicy = KeyExportPolicies.AllowPlaintextArchiving
}))
{
var blob = k.Export(format);
Assert.NotNull(blob);
Assert.Equal(blobHeader.Length + sizeof(short) + sizeof(short) + keySize, blob.Length);
Assert.Equal(blobHeader, blob.AsSpan(0, blobHeader.Length).ToArray());
Assert.Equal(keySize, BitConverter.ToInt16(blob, blobHeader.Length));
Assert.Equal(outputSize, BitConverter.ToInt16(blob, blobHeader.Length + sizeof(short)));
}
}
public static void TryImportEmpty(Algorithm a, KeyBlobFormat format)
{
Assert.False(PublicKey.TryImport(a, ReadOnlySpan <byte> .Empty, format, out var pk));
Assert.Null(pk);
}
public static void ImportEmpty(Algorithm a, KeyBlobFormat format)
{
Assert.Throws <FormatException>(() => PublicKey.Import(a, ReadOnlySpan <byte> .Empty, format));
}
private static void Test(Algorithm a, int seedSize, KeyBlobFormat importFormat, int keySize, KeyBlobFormat format, byte[] blobHeader)
{
var b = Utilities.RandomBytes.Slice(0, seedSize);
using (var k = Key.Import(a, b, importFormat, KeyFlags.AllowArchiving))
{
var blob = k.Export(format);
Assert.NotNull(blob);
Assert.Equal(blobHeader.Length + sizeof(uint) + keySize, blob.Length);
Assert.Equal(blobHeader, blob.AsSpan().Slice(0, blobHeader.Length).ToArray());
Assert.Equal(BitConverter.GetBytes(keySize), blob.AsSpan().Slice(blobHeader.Length, sizeof(int)).ToArray());
}
}
public static void TryImportSymmetricKeyEmpty(Type algorithmType, KeyBlobFormat format)
{
var a = (Algorithm)Activator.CreateInstance(algorithmType);
Assert.False(Key.TryImport(a, ReadOnlySpan <byte> .Empty, format, KeyExportPolicies.None, out Key k));
}
public static void ImportSymmetricKeyEmpty(Type algorithmType, KeyBlobFormat format)
{
var a = (Algorithm)Activator.CreateInstance(algorithmType);
Assert.Throws <FormatException>(() => Key.Import(a, ReadOnlySpan <byte> .Empty, format));
}
public static void TryImportSymmetricKeyEmpty(Algorithm a, KeyBlobFormat format)
{
Assert.False(Key.TryImport(a, ReadOnlySpan <byte> .Empty, format, out var k, new KeyCreationParameters {
ExportPolicy = KeyExportPolicies.None
}));
}
public static void TryExportSmaller(Algorithm a, KeyBlobFormat format)
{
using var k = new Key(a);
Assert.False(k.PublicKey.TryExport(format, Span <byte> .Empty, out _));
}
// Gets the size of a key blob in the specified format.
internal virtual int GetKeyBlobSize(
KeyBlobFormat format)
{
throw Error.NotSupported_ExportKey();
}
public byte[] Export(
KeyBlobFormat format)
{
byte[] blob;
int blobSize;
if (format < 0)
{
if (_handle.IsClosed)
{
throw Error.ObjectDisposed_Key();
}
bool allowExport = (_flags & KeyFlags.AllowExport) != 0;
bool allowArchiving = (_flags & KeyFlags.AllowArchiving) != 0;
if (!allowExport)
{
if (!allowArchiving)
{
throw Error.InvalidOperation_ExportNotAllowed();
}
if (_exported)
{
throw Error.InvalidOperation_AlreadyArchived();
}
}
_exported = true;
if (_algorithm.TryExportKey(_handle, format, Span <byte> .Empty, out blobSize))
{
Debug.Assert(blobSize == 0);
return(Utilities.Empty <byte>());
}
blob = new byte[blobSize];
if (_algorithm.TryExportKey(_handle, format, blob, out blobSize))
{
Debug.Assert(blobSize == blob.Length);
return(blob);
}
throw Error.Cryptographic_InternalError();
}
else
{
if (_publicKey == null)
{
throw Error.Argument_FormatNotSupported(nameof(format), format.ToString());
}
if (_algorithm.TryExportPublicKey(_publicKey.Bytes, format, Span <byte> .Empty, out blobSize))
{
Debug.Assert(blobSize == 0);
return(Utilities.Empty <byte>());
}
blob = new byte[blobSize];
if (_algorithm.TryExportPublicKey(_publicKey.Bytes, format, blob, out blobSize))
{
Debug.Assert(blobSize == blob.Length);
return(blob);
}
throw Error.Cryptographic_InternalError();
}
}