public string GenerateCodeVerifier()
{
byte[] buffer = new byte[Constants.CodeVerifierByteSize];
var windowsBuffer = CryptographicBuffer.GenerateRandom((uint)buffer.Length);
Array.Copy(windowsBuffer.ToArray(), buffer, buffer.Length);
return(MsalHelpers.EncodeToBase64Url(buffer));
}
public string GenerateCodeVerifier()
{
byte[] buffer = new byte[Internal.Constants.CodeVerifierByteSize];
using (RNGCryptoServiceProvider randomSource = new RNGCryptoServiceProvider())
{
randomSource.GetBytes(buffer);
}
return(MsalHelpers.EncodeToBase64Url(buffer));
}
private Uri CreateAuthorizationUri(bool addVerifier = false, bool addState = false)
{
IDictionary <string, string> requestParameters = this.CreateAuthorizationRequestParameters();
if (addVerifier)
{
_codeVerifier = PlatformPlugin.CryptographyHelper.GenerateCodeVerifier();
string codeVerifierHash = PlatformPlugin.CryptographyHelper.CreateSha256Hash(_codeVerifier);
requestParameters[OAuth2Parameter.CodeChallenge] = MsalHelpers.EncodeToBase64Url(codeVerifierHash);
requestParameters[OAuth2Parameter.CodeChallengeMethod] = OAuth2Value.CodeChallengeMethodValue;
}
if (addState)
{
_state = Guid.NewGuid().ToString();
requestParameters[OAuth2Parameter.State] = _state;
}
if (!string.IsNullOrWhiteSpace(AuthenticationRequestParameters.ExtraQueryParameters))
{
// Checks for _extraQueryParameters duplicating standard parameters
Dictionary <string, string> kvps =
MsalHelpers.ParseKeyValueList(AuthenticationRequestParameters.ExtraQueryParameters, '&', false,
this.CallState);
foreach (KeyValuePair <string, string> kvp in kvps)
{
if (requestParameters.ContainsKey(kvp.Key))
{
throw new MsalException(MsalError.DuplicateQueryParameter,
string.Format(CultureInfo.InvariantCulture, MsalErrorMessage.DuplicateQueryParameterTemplate,
kvp.Key));
}
}
}
string qp = requestParameters.ToQueryParameter();
if (!string.IsNullOrEmpty(AuthenticationRequestParameters.ExtraQueryParameters))
{
qp += "&" + AuthenticationRequestParameters.ExtraQueryParameters;
}
return(new Uri(new Uri(this.Authority.AuthorizationEndpoint), "?" + qp));
}
