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public static FromUnsignedBigInteger ( byte big ) : |
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| big | byte | |
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/// <summary>
/// Encodes the RSAParameters as an asn1-encoded RSAPublicKey or RSAPrivateKey struct, as defined by PKCS#1 / rfc3447.
/// </summary>
/// <param name="rsa">The RSA.</param>
/// <returns></returns>
/// <remarks>Adapted from Mono.Security</remarks>
public static byte[] EncodeAsAsn1(RSAParameters param)
{
ASN1 asn1;
// See: http://tools.ietf.org/html/rfc3447
// - A.1.1 RSA public key syntax
// - A.1.2 RSA private key syntax
if (param.D == null)
{
// Emit a RSAPublicKey ASN.1 type.
asn1 = new ASN1(0x30);
asn1.Add(ASN1Convert.FromUnsignedBigInteger(param.Modulus));
asn1.Add(ASN1Convert.FromUnsignedBigInteger(param.Exponent));
}
else
{
// Emit a RSAPrivateKey ASN.1 type.
asn1 = new ASN1(0x30);
asn1.Add(new ASN1(0x02, new byte[1] {
0x00
}));
asn1.Add(ASN1Convert.FromUnsignedBigInteger(param.Modulus));
asn1.Add(ASN1Convert.FromUnsignedBigInteger(param.Exponent));
asn1.Add(ASN1Convert.FromUnsignedBigInteger(param.D));
asn1.Add(ASN1Convert.FromUnsignedBigInteger(param.P));
asn1.Add(ASN1Convert.FromUnsignedBigInteger(param.Q));
asn1.Add(ASN1Convert.FromUnsignedBigInteger(param.DP));
asn1.Add(ASN1Convert.FromUnsignedBigInteger(param.DQ));
asn1.Add(ASN1Convert.FromUnsignedBigInteger(param.InverseQ));
}
return(asn1.GetBytes());
}
/*
* RSAPrivateKey ::= SEQUENCE {
* version Version,
* modulus INTEGER, -- n
* publicExponent INTEGER, -- e
* privateExponent INTEGER, -- d
* prime1 INTEGER, -- p
* prime2 INTEGER, -- q
* exponent1 INTEGER, -- d mod (p-1)
* exponent2 INTEGER, -- d mod (q-1)
* coefficient INTEGER, -- (inverse of q) mod p
* otherPrimeInfos OtherPrimeInfos OPTIONAL
* }
*/
static public byte[] Encode(RSA rsa)
{
RSAParameters param = rsa.ExportParameters(true);
ASN1 rsaPrivateKey = new ASN1(0x30);
rsaPrivateKey.Add(new ASN1(0x02, new byte[1] {
0x00
}));
rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.Modulus));
rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.Exponent));
rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.D));
rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.P));
rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.Q));
rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.DP));
rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.DQ));
rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.InverseQ));
return(rsaPrivateKey.GetBytes());
}
static public byte[] Encode(DSA dsa)
{
DSAParameters param = dsa.ExportParameters(true);
return(ASN1Convert.FromUnsignedBigInteger(param.X).GetBytes());
}
