public void RandomStringTests()
{
var nonce = HawkCrypto.RandomString();
Assert.Equal(28, nonce.Length);
Assert.NotEqual(HawkCrypto.RandomString(), nonce);
}
public async Task SignAsync(HttpRequestMessage request, string?ext = null, bool requirePayloadHash = false)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
request.Headers.Host ??= request.RequestUri?.Host;
var timestamp = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
var nonce = HawkCrypto.RandomString();
var hash = "";
if (requirePayloadHash || _credential.RequirePayloadHash)
{
if (request.Content == null)
{
throw new ArgumentNullException(nameof(request));
}
var contentType = request.Content.Headers.ContentType?.MediaType;
if (string.IsNullOrWhiteSpace(contentType))
{
throw new NullReferenceException(nameof(contentType));
}
hash = HawkCrypto.CalculatePayloadHash(contentType, await request.Content.ReadAsStringAsync().ConfigureAwait(false));
}
if (request.RequestUri == null)
{
throw new NullReferenceException();
}
var mac = HawkCrypto.CalculateMac(_credential.Key, timestamp, nonce, request.Method.Method, request.RequestUri.PathAndQuery, request.RequestUri.Host, request.RequestUri.Port, hash, ext);
var signature = new HawkSignature
{
KeyId = _credential.KeyId,
Timestamp = timestamp,
Nonce = nonce,
Hash = hash,
Ext = ext,
Mac = mac
};
var header = $"{HawkConstants.AuthenticationScheme} {signature}";
request.Headers.TryAddWithoutValidation("Authorization", header);
}