// Convert RSA public parameters into an ASN.1 buffer.
internal void PublicToASN1(ASN1Builder builder, bool x509)
{
if (x509)
{
// Output an X.509 "SubjectPublicKeyInfo" block.
ASN1Builder alg = builder.AddSequence();
alg.AddObjectIdentifier(rsaID);
alg.AddNull();
ASN1Builder bitString = builder.AddBitStringContents();
ASN1Builder inner = bitString.AddSequence();
inner.AddBigInt(Modulus);
inner.AddBigInt(Exponent);
}
else
{
// Output a bare list of RSA parameters.
builder.AddBigInt(Modulus);
builder.AddBigInt(Exponent);
}
}
// Convert DSA public parameters into an ASN.1 buffer.
internal void PublicToASN1(ASN1Builder builder, bool x509)
{
if (x509)
{
// Output an X.509 "SubjectPublicKeyInfo" block.
ASN1Builder alg = builder.AddSequence();
alg.AddObjectIdentifier(dsaID);
ASN1Builder inner = alg.AddSequence();
inner.AddBigInt(P);
inner.AddBigInt(Q);
inner.AddBigInt(G);
ASN1Builder bitString = builder.AddBitStringContents();
bitString.AddBigInt(Y);
}
else
{
// Output the raw public parameters.
builder.AddBigInt(P);
builder.AddBigInt(Q);
builder.AddBigInt(G);
builder.AddBigInt(Y);
}
}
