/// <summary>
/// Create a permissions string to provide
/// <see cref="QueueSasBuilder.Permissions"/>.
/// </summary>
/// <returns>A permissions string.</returns>
internal static string ToPermissionsString(this QueueAccountSasPermissions permissions)
{
var sb = new StringBuilder();
if ((permissions & QueueAccountSasPermissions.Read) == QueueAccountSasPermissions.Read)
{
sb.Append(Constants.Sas.Permissions.Read);
}
if ((permissions & QueueAccountSasPermissions.Write) == QueueAccountSasPermissions.Write)
{
sb.Append(Constants.Sas.Permissions.Write);
}
if ((permissions & QueueAccountSasPermissions.Delete) == QueueAccountSasPermissions.Delete)
{
sb.Append(Constants.Sas.Permissions.Delete);
}
if ((permissions & QueueAccountSasPermissions.List) == QueueAccountSasPermissions.List)
{
sb.Append(Constants.Sas.Permissions.List);
}
if ((permissions & QueueAccountSasPermissions.Add) == QueueAccountSasPermissions.Add)
{
sb.Append(Constants.Sas.Permissions.Add);
}
if ((permissions & QueueAccountSasPermissions.Update) == QueueAccountSasPermissions.Update)
{
sb.Append(Constants.Sas.Permissions.Update);
}
if ((permissions & QueueAccountSasPermissions.Process) == QueueAccountSasPermissions.Process)
{
sb.Append(Constants.Sas.Permissions.Process);
}
return(sb.ToString());
}
/// <summary>
/// ToSasQueryParameters uses an account's shared key credential to sign this signature values to produce
/// the proper SAS query parameters.
/// </summary>
/// <param name="sharedKeyCredential">
/// <see cref="SharedKeyCredentials"/>
/// </param>
/// <returns>
/// <see cref="SasQueryParameters"/>
/// </returns>
public SasQueryParameters ToSasQueryParameters(SharedKeyCredentials sharedKeyCredential)
{
sharedKeyCredential = sharedKeyCredential ?? throw Errors.ArgumentNull(nameof(sharedKeyCredential));
this.Permissions = QueueAccountSasPermissions.Parse(this.Permissions).ToString();
if (String.IsNullOrEmpty(this.Version))
{
this.Version = SasQueryParameters.SasVersion;
}
var startTime = SasQueryParameters.FormatTimesForSasSigning(this.StartTime);
var expiryTime = SasQueryParameters.FormatTimesForSasSigning(this.ExpiryTime);
// String to sign: http://msdn.microsoft.com/en-us/library/azure/dn140255.aspx
var stringToSign = String.Join("\n",
this.Permissions,
startTime,
expiryTime,
GetCanonicalName(sharedKeyCredential.AccountName, this.QueueName ?? String.Empty),
this.Identifier,
this.IPRange.ToString(),
this.Protocol.ToString(),
this.Version);
var signature = sharedKeyCredential.ComputeHMACSHA256(stringToSign);
var p = new SasQueryParameters(
version: this.Version,
services: null,
resourceTypes: null,
protocol: this.Protocol,
startTime: this.StartTime,
expiryTime: this.ExpiryTime,
ipRange: this.IPRange,
identifier: this.Identifier,
resource: null,
permissions: this.Permissions,
signature: signature);
return(p);
}