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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics.CodeAnalysis;
using System.Runtime.Versioning;
using Microsoft.Win32.SafeHandles;
namespace System.Security.Cryptography
{
public sealed partial class ECDiffieHellmanOpenSsl : ECDiffieHellman
{
private ECOpenSsl? _key;
[UnsupportedOSPlatform("android")]
[UnsupportedOSPlatform("browser")]
[UnsupportedOSPlatform("ios")]
[UnsupportedOSPlatform("tvos")]
[UnsupportedOSPlatform("windows")]
public ECDiffieHellmanOpenSsl(ECCurve curve)
{
ThrowIfNotSupported();
_key = new ECOpenSsl(curve);
KeySizeValue = _key.KeySize;
}
[UnsupportedOSPlatform("android")]
[UnsupportedOSPlatform("browser")]
[UnsupportedOSPlatform("ios")]
[UnsupportedOSPlatform("tvos")]
[UnsupportedOSPlatform("windows")]
public ECDiffieHellmanOpenSsl()
: this(521)
{
}
[UnsupportedOSPlatform("android")]
[UnsupportedOSPlatform("browser")]
[UnsupportedOSPlatform("ios")]
[UnsupportedOSPlatform("tvos")]
[UnsupportedOSPlatform("windows")]
public ECDiffieHellmanOpenSsl(int keySize)
{
ThrowIfNotSupported();
base.KeySize = keySize;
_key = new ECOpenSsl(this);
}
public override KeySizes[] LegalKeySizes => s_defaultKeySizes.CloneKeySizesArray();
protected override void Dispose(bool disposing)
{
if (disposing)
{
_key?.Dispose();
_key = null;
}
base.Dispose(disposing);
}
public override int KeySize
{
get
{
return base.KeySize;
}
set
{
if (KeySize == value)
{
return;
}
// Set the KeySize before FreeKey so that an invalid value doesn't throw away the key
base.KeySize = value;
ThrowIfDisposed();
_key.Dispose();
_key = new ECOpenSsl(this);
}
}
public override void GenerateKey(ECCurve curve)
{
ThrowIfDisposed();
KeySizeValue = _key.GenerateKey(curve);
}
public override ECDiffieHellmanPublicKey PublicKey
{
get
{
ThrowIfDisposed();
using (SafeEvpPKeyHandle handle = _key.UpRefKeyHandle())
{
return new ECDiffieHellmanOpenSslPublicKey(handle);
}
}
}
public override void ImportParameters(ECParameters parameters)
{
ThrowIfDisposed();
KeySizeValue = _key.ImportParameters(parameters);
}
public override ECParameters ExportExplicitParameters(bool includePrivateParameters) =>
ECOpenSsl.ExportExplicitParameters(GetKey(), includePrivateParameters);
public override ECParameters ExportParameters(bool includePrivateParameters) =>
ECOpenSsl.ExportParameters(GetKey(), includePrivateParameters);
public override void ImportEncryptedPkcs8PrivateKey(
ReadOnlySpan<byte> passwordBytes,
ReadOnlySpan<byte> source,
out int bytesRead)
{
ThrowIfDisposed();
base.ImportEncryptedPkcs8PrivateKey(passwordBytes, source, out bytesRead);
}
public override void ImportEncryptedPkcs8PrivateKey(
ReadOnlySpan<char> password,
ReadOnlySpan<byte> source,
out int bytesRead)
{
ThrowIfDisposed();
base.ImportEncryptedPkcs8PrivateKey(password, source, out bytesRead);
}
[MemberNotNull(nameof(_key))]
private void ThrowIfDisposed()
{
ObjectDisposedException.ThrowIf(_key is null, this);
}
private SafeEcKeyHandle GetKey()
{
ThrowIfDisposed();
return _key.Value;
}
static partial void ThrowIfNotSupported();
}
}
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