/// <summary>
/// Calculates the payload information based on the request and the authentication information.
/// </summary>
/// <param name="request">
/// The request which has the information (method, url and content) for the calculation.
/// </param>
/// <param name="authInfo">
/// The <see cref="PrivateKeyAuthenticationInfo"/> which holds the application uuid, the time of the
/// signature and the private key.
/// </param>
/// <returns>A task object which will result the payload as a Base64 encoded string when completed.</returns>
public static async Task <string> CalculatePayload(
this HttpRequestMessage request, PrivateKeyAuthenticationInfo authInfo)
{
var unsignedData = await request.GetSignature(authInfo);
var signer = new Pkcs1Encoding(new RsaEngine());
signer.Init(true, authInfo.PrivateKey.AsCipherParameters());
return(Convert.ToBase64String(signer.ProcessBlock(unsignedData, 0, unsignedData.Length)));
}
/// <summary>
/// Adds authentication information to a <see cref="HttpRequestMessage"/>.
/// </summary>
/// <param name="request">The request to add the information to.</param>
/// <param name="authInfo">
/// The authentication information with a private key to calculate the payload with.
/// </param>
/// <returns>
/// A Task object which will result the request with the authentication information added when it completes.
/// </returns>
internal async Task <HttpRequestMessage> AddAuthenticationInfo(
HttpRequestMessage request, PrivateKeyAuthenticationInfo authInfo)
{
var authHeader =
$"{MAuthVersion.MWSV2} {authInfo.ApplicationUuid.ToHyphenString()}:" +
$"{await CalculatePayload(request, authInfo).ConfigureAwait(false)};";
request.Headers.Add(Constants.MAuthHeaderKeyV2, authHeader);
request.Headers.Add(Constants.MAuthTimeHeaderKeyV2, authInfo.SignedTime.ToUnixTimeSeconds().ToString());
return(request);
}
/// <summary>
/// Adds authentication information to a <see cref="HttpRequestMessage"/>.
/// </summary>
/// <param name="request">The request to add the information to.</param>
/// <param name="authInfo">
/// The authentication information with a private key to calculate the payload with.
/// </param>
/// <returns>
/// A Task object which will result the request with the authentication information added when it completes.
/// </returns>
public async static Task <HttpRequestMessage> AddAuthenticationInfo(
this HttpRequestMessage request, PrivateKeyAuthenticationInfo authInfo)
{
var authHeader =
$"MWS {authInfo.ApplicationUuid.ToHyphenString()}:" +
$"{await request.CalculatePayload(authInfo)}";
request.Headers.Add(Constants.MAuthHeaderKey, authHeader);
request.Headers.Add(Constants.MAuthTimeHeaderKey, authInfo.SignedTime.ToUnixTimeSeconds().ToString());
return(request);
}
/// <summary>
/// Calculates the payload information based on the request and the authentication information.
/// </summary>
/// <param name="request">
/// The request which has the information (method, url and content) for the calculation.
/// </param>
/// <param name="authInfo">
/// The <see cref="PrivateKeyAuthenticationInfo"/> which holds the application uuid, the time of the
/// signature and the private key.
/// </param>
/// <returns>A task object which will result the payload as a Base64 encoded string when completed.</returns>
internal async Task <string> CalculatePayload(
HttpRequestMessage request, PrivateKeyAuthenticationInfo authInfo)
{
var unsignedData = await GetSignature(request, authInfo).ConfigureAwait(false);
var signer = new RSACryptoServiceProvider();
signer.PersistKeyInCsp = false;
signer.ImportParameters(authInfo.PrivateKey.AsRsaParameters());
return(Convert.ToBase64String(signer.SignData(unsignedData, CryptoConfig.MapNameToOID("SHA512"))));
}
