/// <summary>
/// 根据十六进制还是base64来进行RSA的初始化
/// </summary>
/// <param name="privateKey"></param>
/// <returns></returns>
public static RSA CreateRsaProviderFromPrivateKey(byte[] privateKeyByte)
{
using (var rsa = RSA.Create())
{
var rsaParameters = new RSAParameters();
using (BinaryReader binr = new BinaryReader(new MemoryStream(privateKeyByte)))
{
byte bt = 0;
ushort twobytes = 0;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8130)
{
binr.ReadByte();
}
else if (twobytes == 0x8230)
{
binr.ReadInt16();
}
else
{
throw new Exception("Unexpected value read binr.ReadUInt16()");
}
twobytes = binr.ReadUInt16();
if (twobytes != 0x0102)
{
throw new Exception("Unexpected version");
}
bt = binr.ReadByte();
if (bt != 0x00)
{
throw new Exception("Unexpected value read binr.ReadByte()");
}
rsaParameters.Modulus = binr.ReadBytes(SecretAlg.GetIntegerSize(binr));
rsaParameters.Exponent = binr.ReadBytes(SecretAlg.GetIntegerSize(binr));
rsaParameters.D = binr.ReadBytes(SecretAlg.GetIntegerSize(binr));
rsaParameters.P = binr.ReadBytes(SecretAlg.GetIntegerSize(binr));
rsaParameters.Q = binr.ReadBytes(SecretAlg.GetIntegerSize(binr));
rsaParameters.DP = binr.ReadBytes(SecretAlg.GetIntegerSize(binr));
rsaParameters.DQ = binr.ReadBytes(SecretAlg.GetIntegerSize(binr));
rsaParameters.InverseQ = binr.ReadBytes(SecretAlg.GetIntegerSize(binr));
}
rsa.ImportParameters(rsaParameters);
return(rsa);
}
}
