/// <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 PrivateKeyBlob FromBinary(BinaryReader reader, BlobHeader header)
{
var privateKeyBlob = new PrivateKeyBlob
{
Header = header,
RSAPubKey = RSAPubKey.FromBinary(reader),
};
int byteLength = (int)(privateKeyBlob.RSAPubKey.BitLength >> 3);
int wordLength = (int)(privateKeyBlob.RSAPubKey.BitLength >> 4);
privateKeyBlob.Modulus = new byte[byteLength];
reader.Read(privateKeyBlob.Modulus, 0, privateKeyBlob.Modulus.Length);
privateKeyBlob.Prime1 = new byte[wordLength];
reader.Read(privateKeyBlob.Prime1, 0, privateKeyBlob.Prime1.Length);
privateKeyBlob.Prime2 = new byte[wordLength];
reader.Read(privateKeyBlob.Prime2, 0, privateKeyBlob.Prime2.Length);
privateKeyBlob.Exponent1 = new byte[wordLength];
reader.Read(privateKeyBlob.Exponent1, 0, privateKeyBlob.Exponent1.Length);
privateKeyBlob.Exponent2 = new byte[wordLength];
reader.Read(privateKeyBlob.Exponent2, 0, privateKeyBlob.Exponent2.Length);
privateKeyBlob.Coefficient = new byte[wordLength];
reader.Read(privateKeyBlob.Coefficient, 0, privateKeyBlob.Coefficient.Length);
privateKeyBlob.PrivateExponent = new byte[byteLength];
reader.Read(privateKeyBlob.PrivateExponent, 0, privateKeyBlob.PrivateExponent.Length);
return(privateKeyBlob);
}
/// <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 PrivateKeyBlob FromRSAParameters(RSAParameters @params)
{
var privateKeyBlob = new PrivateKeyBlob
{
Header = BlobHeader.FromRSAParameters(KeyBlobType.PrivateKeyBlob),
RSAPubKey = RSAPubKey.FromRSAParameters(@params, true),
};
privateKeyBlob.Modulus = new byte[@params.N.Length];
for (int i = 0; i < privateKeyBlob.Modulus.Length; i++)
{
privateKeyBlob.Modulus[i] = @params.N[@params.N.Length - i - 1];
}
privateKeyBlob.Prime1 = new byte[@params.P.Length];
for (int i = 0; i < privateKeyBlob.Prime1.Length; i++)
{
privateKeyBlob.Prime1[i] = @params.P[@params.P.Length - i - 1];
}
privateKeyBlob.Prime2 = new byte[@params.Q.Length];
for (int i = 0; i < privateKeyBlob.Prime2.Length; i++)
{
privateKeyBlob.Prime2[i] = @params.Q[@params.Q.Length - i - 1];
}
privateKeyBlob.Exponent1 = new byte[@params.DP.Length];
for (int i = 0; i < privateKeyBlob.Exponent1.Length; i++)
{
privateKeyBlob.Exponent1[i] = @params.DP[@params.DP.Length - i - 1];
}
privateKeyBlob.Exponent2 = new byte[@params.DQ.Length];
for (int i = 0; i < privateKeyBlob.Exponent2.Length; i++)
{
privateKeyBlob.Exponent2[i] = @params.DQ[@params.DQ.Length - i - 1];
}
privateKeyBlob.Coefficient = new byte[@params.IQ.Length];
for (int i = 0; i < privateKeyBlob.Coefficient.Length; i++)
{
privateKeyBlob.Coefficient[i] = @params.IQ[@params.IQ.Length - i - 1];
}
privateKeyBlob.PrivateExponent = new byte[@params.D.Length];
for (int i = 0; i < privateKeyBlob.PrivateExponent.Length; i++)
{
privateKeyBlob.PrivateExponent[i] = @params.D[@params.D.Length - i - 1];
}
return(privateKeyBlob);
}
/// <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 PrivateKeyBlob FromRSAParameters(RSAParameters @params)
{
var privateKeyBlob = new PrivateKeyBlob
{
Header = BlobHeader.FromRSAParameters(KeyBlobType.PrivateKeyBlob),
RSAPubKey = RSAPubKey.FromRSAParameters(@params, true),
};
privateKeyBlob.Modulus = new byte[@params.N.Length];
for (int i = 0; i < privateKeyBlob.Modulus.Length; i++)
{
privateKeyBlob.Modulus[i] = @params.N[@params.N.Length - i - 1];
}
privateKeyBlob.Prime1 = new byte[@params.P.Length];
for (int i = 0; i < privateKeyBlob.Prime1.Length; i++)
{
privateKeyBlob.Prime1[i] = @params.P[@params.P.Length - i - 1];
}
privateKeyBlob.Prime2 = new byte[@params.Q.Length];
for (int i = 0; i < privateKeyBlob.Prime2.Length; i++)
{
privateKeyBlob.Prime2[i] = @params.Q[@params.Q.Length - i - 1];
}
privateKeyBlob.Exponent1 = new byte[@params.DP.Length];
for (int i = 0; i < privateKeyBlob.Exponent1.Length; i++)
{
privateKeyBlob.Exponent1[i] = @params.DP[@params.DP.Length - i - 1];
}
privateKeyBlob.Exponent2 = new byte[@params.DQ.Length];
for (int i = 0; i < privateKeyBlob.Exponent2.Length; i++)
{
privateKeyBlob.Exponent2[i] = @params.DQ[@params.DQ.Length - i - 1];
}
privateKeyBlob.Coefficient = new byte[@params.IQ.Length];
for (int i = 0; i < privateKeyBlob.Coefficient.Length; i++)
{
privateKeyBlob.Coefficient[i] = @params.IQ[@params.IQ.Length - i - 1];
}
privateKeyBlob.PrivateExponent = new byte[@params.D.Length];
for (int i = 0; i < privateKeyBlob.PrivateExponent.Length; i++)
{
privateKeyBlob.PrivateExponent[i] = @params.D[@params.D.Length - i - 1];
}
return privateKeyBlob;
}
/// <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 PrivateKeyBlob FromBinary(BinaryReader reader, BlobHeader header)
{
var privateKeyBlob = new PrivateKeyBlob
{
Header = header,
RSAPubKey = RSAPubKey.FromBinary(reader),
};
int byteLength = (int)(privateKeyBlob.RSAPubKey.BitLength >> 3);
int wordLength = (int)(privateKeyBlob.RSAPubKey.BitLength >> 4);
privateKeyBlob.Modulus = new byte[byteLength];
reader.Read(privateKeyBlob.Modulus, 0, privateKeyBlob.Modulus.Length);
privateKeyBlob.Prime1 = new byte[wordLength];
reader.Read(privateKeyBlob.Prime1, 0, privateKeyBlob.Prime1.Length);
privateKeyBlob.Prime2 = new byte[wordLength];
reader.Read(privateKeyBlob.Prime2, 0, privateKeyBlob.Prime2.Length);
privateKeyBlob.Exponent1 = new byte[wordLength];
reader.Read(privateKeyBlob.Exponent1, 0, privateKeyBlob.Exponent1.Length);
privateKeyBlob.Exponent2 = new byte[wordLength];
reader.Read(privateKeyBlob.Exponent2, 0, privateKeyBlob.Exponent2.Length);
privateKeyBlob.Coefficient = new byte[wordLength];
reader.Read(privateKeyBlob.Coefficient, 0, privateKeyBlob.Coefficient.Length);
privateKeyBlob.PrivateExponent = new byte[byteLength];
reader.Read(privateKeyBlob.PrivateExponent, 0, privateKeyBlob.PrivateExponent.Length);
return privateKeyBlob;
}
