static Utf8String s_emptyHeaders = (Utf8String)"\n\n\n\n\n\n\n\n\n\n\nx-ms-date:"; // this wont be needed once we have UTF8 literals
public static bool TryWrite(Span <byte> output, Sha256 hash, string verb, string canonicalizedResource, DateTime utc, out int bytesWritten)
{
try
{
var writer = new SpanWriter(output);
writer.WriteLine(verb);
writer.Write("\n\n\n\n\n\n\n\n\n\n\nx-ms-date:");
writer.WriteLine(utc, 'R');
writer.Write(canonicalizedResource);
hash.Append(writer.Written);
writer.Index = 0;
writer.WriteBytes(hash, default, Base64Experimental.BytesToUtf8Encoder);
public static bool TryWrite(Span <byte> output, Sha256 hash, string keyType, string verb, string resourceId, string resourceType, string tokenVersion, DateTime utc, out int bytesWritten)
{
Span <byte> buffer = stackalloc byte[AuthenticationHeaderBufferSize];
var writer = new SpanWriter(buffer);
writer.Enlarge = (minumumSize) => { return(new byte[minumumSize * 2]); };
// compute signature hash
writer.WriteLine(verb, Ascii.ToLowercase);
writer.WriteLine(resourceType, Ascii.ToLowercase);
writer.WriteLine(resourceId, Ascii.ToLowercase);
writer.WriteLine(utc, 'l');
writer.Write('\n');
hash.Append(writer.Written);
// combine token
writer.Index = 0; // reuse writer and buffer
writer.Write("type=");
writer.Write(keyType);
writer.Write("&ver=");
writer.Write(tokenVersion);
writer.Write("&sig=");
writer.WriteBytes(hash, default, Base64Experimental.BytesToUtf8Encoder);
