Invalid signature on upload

Nathan

April 28, 2020 15:32

Hi,

I'm trying implement signed uploads with Angular and .net core 3, but my signatures are always invalid, the error message I'm getting is :

"Invalid Signature <my-signature>. String to sign - 'folder=clubCarpool&source=uw&timestamp=1588084033&upload_preset=ml_default'.

But I can't find the missing informations when I generate my signature.

 

To generate the signature I'm using the dotnet core cloudinary library, and on the front-end side I'm using the upload widget. Here's the code I'm using to do this :

On the Angular side to create the widget :

this.widget = (window as any).cloudinary.createUploadWidget(

      {

        cloudName: this.cloudinary.config().cloud_name,

        uploadPreset: this.cloudinary.config().upload_preset,

        multiple: false,

        uploadSignature: (_callback, _paramsToSign) => {

          this.accountService.accountCloudinaryAuthSignaturePost$Json$Response({body: _paramsToSign}).subscribe(resp => {

            _callback(resp.body.signature);

          });

        },

        apiKey: this.cloudinary.config().api_key,

        folder: 'clubCarpool',

        language: 'fr'

      },

      (_error, result) => {

        if(result.event === "success"){

          this.savedImage = result.info.secure_url;

        }

      }

    );

 

And on the API side (dotnet core 3) :

I'm simply getting the _paramsToSign Dictionary and using it like this :

 

Account account = new Account(

            "clubcarpool",

            "<my-api-key>",

            "<my-api-secret>");

            Cloudinary cloudinary = new Cloudinary(account);

            string signature = cloudinary.Api.SignParameters(_paramsToSignIn);

 

In the _paramsToSignIn, all the keys-value pairs I have are :

"timestamp", "folder", "upload_preset" and "source", should I add another parameter to generate a valid signature ?

 

Regards,

Nathan

0

• 

  Aditi Madan

  April 29, 2020 22:13

  Hi Nathan,

  Along with the params to sign also please note that the order is important. It is arranged in alphabetical order. Please use the exact string: `folder=clubCarpool&source=uw&timestamp=1588084033&upload_preset=ml_default`.

  If you still experience the issue then please open a support ticket here:https://support.cloudinary.com/hc/en-us/requests/new and we will be able to dig in deeper.

  Regards,

  Aditi

  1
• 

  Nathan

  April 29, 2020 23:55

  Thank you very much for your quick response, I was able to fix the issue :)

  0

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