public static RSAParameters GetRSAParameters(this RsaJwk jwk)
{
return(new RSAParameters
{
D = jwk.PrivateExponent,
DP = jwk.FirstFactorCrtExponent,
DQ = jwk.SecondFactorCrtExponent,
Exponent = jwk.Exponent,
InverseQ = jwk.FirstCrtCoefficient,
Modulus = jwk.Modulus,
P = jwk.FirstPrimeFactor,
Q = jwk.SecondPrimeFactor,
});
}
public static RSAEncryptionPadding GetPadding(this RsaJwk jwk)
{
switch (jwk.Algorithm)
{
case "RSA-OAEP": return(RSAEncryptionPadding.OaepSHA1);
case "RSA-OAEP-256": return(RSAEncryptionPadding.OaepSHA256);
case "RSA-OAEP-384": return(RSAEncryptionPadding.OaepSHA384);
case "RSA-OAEP-512": return(RSAEncryptionPadding.OaepSHA512);
default: throw new InvalidDataException($"Unsupported JWK algorithm {jwk.Algorithm}");
}
}
public static (RSA Rsa, RSAEncryptionPadding Padding) ToRSA(this RsaJwk jwk)
{
var rsa = RSA.Create(jwk.GetRSAParameters());
return(rsa, jwk.GetPadding());
}