(C#) How to Generate an Azure Storage Account Shared Access Signature (SAS)

Shows how to generate a Shared Access Signature (SAS) for an Azure Storage Account.

Note: This example requires Chilkat v9.5.0.65 or greater.

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// Note: Requires Chilkat v9.5.0.65 or greater.

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// --------------------------------------------------------------------------
// Create a Shared Access Signature (SAS) token for an Azure Storage Account.
// --------------------------------------------------------------------------

// See https://docs.microsoft.com/en-us/rest/api/storageservices/fileservices/constructing-an-account-sas 
// for details regarding the Azure Storage Account SAS fields.

Chilkat.AuthAzureSAS authSas = new Chilkat.AuthAzureSAS();
authSas.AccessKey = "AZURE_ACCESS_KEY";

// Specify the format of the string to sign.
// Each comma character in the following string represents a LF ("\n") character.
// The names specified in the StringToSign are replaced with the values specified
// in the subsequent calls to SetTokenParam and SetNonTokenParam,.

// Note: The trailing comma in the StringToSign is intentional and important. This indicates that the 
// string to sign will end with a "\n".

// Also note: The names in the StringToSign are case sensitive.  The names
// specified in the 1st argument in the calls to SetNonTokenParam and SetTokenParam should
// match a name listed in StringToSign. 
authSas.StringToSign = "accountname,signedpermissions,signedservice,signedresourcetype,signedstart,signedexpiry,signedIP,signedProtocol,signedversion,";

//  The account name is "chilkat".  Use your own account name instead of "chilkat".
//  Also use your own container name instead of "mycontainer".
authSas.SetNonTokenParam("accountname","chilkat");

authSas.SetTokenParam("signedpermissions","sp","rwdlacup");
authSas.SetTokenParam("signedservice","ss","bfqt");
authSas.SetTokenParam("signedresourcetype","srt","sco");

Chilkat.CkDateTime dt = new Chilkat.CkDateTime();
dt.SetFromCurrentSystemTime();
authSas.SetTokenParam("signedstart","st",dt.GetAsIso8601("YYYY-MM-DDThh:mmTZD",false));

// This SAS token will be valid for 30 days.
dt.AddDays(30);
authSas.SetTokenParam("signedexpiry","se",dt.GetAsIso8601("YYYY-MM-DDThh:mmTZD",false));

authSas.SetTokenParam("signedProtocol","spr","https");

//  Specifiy values and query param names for each field.
//  If a field is not specified, then an empty string will be used for its value.
authSas.SetTokenParam("signedversion","sv","2015-04-05");

// Note that we did not call SetTokenParam for "signedIP".  For any omitted fields
// the value will default to the empty string.

// Generate the SAS token.
string sasToken = authSas.GenerateToken();
if (authSas.LastMethodSuccess != true) {
    Debug.WriteLine(authSas.LastErrorText);
    return;
}

Debug.WriteLine("SAS token: " + sasToken);

// Save the SAS token to a file.
// We can then use this pre-generated token for future Azure Storage Account operations.
Chilkat.FileAccess fac = new Chilkat.FileAccess();
fac.WriteEntireTextFile("qa_data/tokens/azureStorageAccountSas.txt",sasToken,"utf-8",false);