public static RSAParameters ReadRSAPrivateKey(Stream s)
{
using (StreamReader sR = new StreamReader(s))
{
if (sR.ReadLine() != "-----BEGIN RSA PRIVATE KEY-----")
{
throw new IOException("The data should begin with header: -----BEGIN RSA PRIVATE KEY-----");
}
StringBuilder base64Data = new StringBuilder(2048);
do
{
string line = sR.ReadLine();
if (line == "-----END RSA PRIVATE KEY-----")
{
break;
}
base64Data.Append(line);
}while (true);
DEREncoding obj = DEREncoding.Decode(Convert.FromBase64String(base64Data.ToString()));
using (Stream sV = obj.GetValueStream())
{
DEREncoding objVer = DEREncoding.Decode(sV);
if (objVer.Value[0] != 0)
{
throw new IOException("Unknown version number for RSA private key data.");
}
DEREncoding objModulus = DEREncoding.Decode(sV);
DEREncoding objExponent = DEREncoding.Decode(sV);
DEREncoding objD = DEREncoding.Decode(sV);
DEREncoding objP = DEREncoding.Decode(sV);
DEREncoding objQ = DEREncoding.Decode(sV);
DEREncoding objDP = DEREncoding.Decode(sV);
DEREncoding objDQ = DEREncoding.Decode(sV);
DEREncoding objInverseQ = DEREncoding.Decode(sV);
RSAParameters parameters = new RSAParameters();
parameters.Modulus = objModulus.GetIntegerValue();
parameters.Exponent = objExponent.GetIntegerValue();
parameters.D = objD.GetIntegerValue();
parameters.P = objP.GetIntegerValue();
parameters.Q = objQ.GetIntegerValue();
parameters.DP = objDP.GetIntegerValue();
parameters.DQ = objDQ.GetIntegerValue();
parameters.InverseQ = objInverseQ.GetIntegerValue();
return(parameters);
}
}
}
public static RSAParameters DecodeRSAPublicKey(Stream s)
{
DEREncoding seq = Decode(s);
using (Stream seqStream = seq.GetValueStream())
{
DEREncoding objModulus = Decode(seqStream);
DEREncoding objExponent = Decode(seqStream);
RSAParameters parameters = new RSAParameters();
parameters.Modulus = objModulus.GetIntegerValue();
parameters.Exponent = objExponent.GetIntegerValue();
return(parameters);
}
}
public static RSAParameters DecodeRSAPrivateKey(Stream s)
{
DEREncoding seq = Decode(s);
using (Stream seqStream = seq.GetValueStream())
{
DEREncoding objVer = Decode(seqStream);
if (objVer.Value[0] != 0)
{
throw new IOException("Unknown version number for RSA private key data.");
}
DEREncoding objModulus = Decode(seqStream);
DEREncoding objExponent = Decode(seqStream);
DEREncoding objD = Decode(seqStream);
DEREncoding objP = Decode(seqStream);
DEREncoding objQ = Decode(seqStream);
DEREncoding objDP = Decode(seqStream);
DEREncoding objDQ = Decode(seqStream);
DEREncoding objInverseQ = Decode(seqStream);
RSAParameters parameters = new RSAParameters();
parameters.Modulus = objModulus.GetIntegerValue();
parameters.Exponent = objExponent.GetIntegerValue();
parameters.D = objD.GetIntegerValue();
parameters.P = objP.GetIntegerValue();
parameters.Q = objQ.GetIntegerValue();
parameters.DP = objDP.GetIntegerValue();
parameters.DQ = objDQ.GetIntegerValue();
parameters.InverseQ = objInverseQ.GetIntegerValue();
return(parameters);
}
}
