string GenerateSignature(IOAuthContext authContext, SigningContext signingContext)
{
if (signingContext.Algorithm == null)
{
throw Error.AlgorithmPropertyNotSetOnSigningContext();
}
SHA1CryptoServiceProvider sha1 = GenerateHash(signingContext);
var formatter = new RSAPKCS1SignatureFormatter(signingContext.Algorithm);
formatter.SetHashAlgorithm("MD5");
byte[] signature = formatter.CreateSignature(sha1);
return(Convert.ToBase64String(signature));
}
public bool ValidateSignature(IOAuthContext authContext, SigningContext signingContext)
{
if (signingContext.Algorithm == null)
{
throw Error.AlgorithmPropertyNotSetOnSigningContext();
}
SHA1CryptoServiceProvider sha1 = GenerateHash(signingContext);
var deformatter = new RSAPKCS1SignatureDeformatter(signingContext.Algorithm);
deformatter.SetHashAlgorithm("MD5");
byte[] signature = Convert.FromBase64String(authContext.Signature);
return(deformatter.VerifySignature(sha1, signature));
}