/// <summary>
/// Create and initialize structure from binary data with defined header
/// </summary>
/// <exception cref="CryptographicException">On validate errors</exception>
/// <returns>Initialized structure</returns>
public static PublicKeyBlob FromBinary(BinaryReader reader, BlobHeader header)
{
var publicKeyBlob = new PublicKeyBlob
{
Header = header,
RSAPubKey = RSAPubKey.FromBinary(reader),
};
int modulusLength = (int)(publicKeyBlob.RSAPubKey.BitLength >> 3);
publicKeyBlob.Modulus = new byte[modulusLength];
reader.Read(publicKeyBlob.Modulus, 0, publicKeyBlob.Modulus.Length);
return(publicKeyBlob);
}
/// <summary>
/// Create and initialize structure from RSAParameters
/// </summary>
/// <returns>Initialized structure</returns>
/// <note>http://msdn.microsoft.com/en-us/library/system.security.cryptography.rsaparameters.aspx</note>
public static PublicKeyBlob FromRSAParameters(RSAParameters @params)
{
var publicKeyBlob = new PublicKeyBlob
{
Header = BlobHeader.FromRSAParameters(KeyBlobType.PublicKeyBlob),
RSAPubKey = RSAPubKey.FromRSAParameters(@params, false),
Modulus = new byte[@params.N.Length],
};
for (int i = 0; i < publicKeyBlob.Modulus.Length; i++)
{
publicKeyBlob.Modulus[i] = @params.N[@params.N.Length - i - 1];
}
return(publicKeyBlob);
}
/// <summary>
/// Exports a blob that contains the key information associated with an AsymmetricAlgorithm object.
/// </summary>
/// <param name="includePrivateParameters">true to include the private key; otherwise, false.</param>
/// <returns>A byte array that contains the key information associated with an AsymmetricAlgorithm object</returns>
public byte[] ExportCspBlob(bool includePrivateParameters)
{
var @params = this.ExportParameters();
using (var stream = new MemoryStream())
{
using (var writer = new BinaryWriter(stream))
{
if (includePrivateParameters)
{
PrivateKeyBlob.FromRSAParameters(@params).ToBinary(writer);
}
else
{
PublicKeyBlob.FromRSAParameters(@params).ToBinary(writer);
}
return(stream.ToArray());
}
}
}
/// <summary>
/// Imports a blob that represents asymmetric key information.
/// </summary>
/// <param name="rawData">A byte array that represents an asymmetric key blob.</param>
/// <exception cref="CryptographicException">Invalid key blob data</exception>
/// <returns>Initialized RSAParameters structure</returns>
public void ImportCspBlob(byte[] rawData)
{
using (var stream = new MemoryStream(rawData))
{
using (var reader = new BinaryReader(stream))
{
BlobHeader header = BlobHeader.FromBinary(reader);
if (header.BlobType == KeyBlobType.PublicKeyBlob)
{
this.ImportParameters(PublicKeyBlob.FromBinary(reader, header).ToRSAParameters());
return;
}
if (header.BlobType == KeyBlobType.PrivateKeyBlob)
{
this.ImportParameters(PrivateKeyBlob.FromBinary(reader, header).ToRSAParameters());
return;
}
}
}
throw new CryptographicException("Invalid key blob data");
}
/// <summary>
/// Create and initialize structure from RSAParameters
/// </summary>
/// <returns>Initialized structure</returns>
/// <note>http://msdn.microsoft.com/en-us/library/system.security.cryptography.rsaparameters.aspx</note>
public static PublicKeyBlob FromRSAParameters(RSAParameters @params)
{
var publicKeyBlob = new PublicKeyBlob
{
Header = BlobHeader.FromRSAParameters(KeyBlobType.PublicKeyBlob),
RSAPubKey = RSAPubKey.FromRSAParameters(@params, false),
Modulus = new byte[@params.N.Length],
};
for (int i = 0; i < publicKeyBlob.Modulus.Length; i++)
{
publicKeyBlob.Modulus[i] = @params.N[@params.N.Length - i - 1];
}
return publicKeyBlob;
}
/// <summary>
/// Create and initialize structure from binary data with defined header
/// </summary>
/// <exception cref="CryptographicException">On validate errors</exception>
/// <returns>Initialized structure</returns>
public static PublicKeyBlob FromBinary(BinaryReader reader, BlobHeader header)
{
var publicKeyBlob = new PublicKeyBlob
{
Header = header,
RSAPubKey = RSAPubKey.FromBinary(reader),
};
int modulusLength = (int)(publicKeyBlob.RSAPubKey.BitLength >> 3);
publicKeyBlob.Modulus = new byte[modulusLength];
reader.Read(publicKeyBlob.Modulus, 0, publicKeyBlob.Modulus.Length);
return publicKeyBlob;
}
