Errors::SignatureDoesNotMatch, AWS-SDK gem for S3 support on paperclip 3.0.1 and rails 3.2

Question

I'm migrating my app from Rails 3.0.9 to 3.2.3 and ruby 1.9.3. I was using paperclip(2.3.11) with aws-s3 gem to store my pictures.

Now I want to use the last version of paperclip(3.0.1) and then I have to use aws-sdk gem.

I've set my aws.yml file as:

    development: &development
      bucket: bucket_name_for_dev
      access_key_id: *****
      secret_access_key: *******
    staging:
      <<: *development
      bucket: bucket_name_for_staging

    production:
      <<: *development
      bucket: bucket_name_for_prod

my model contains :

    has_attached_file :picture, :styles => { :medium => "300x300>", :thumb => "50x50>" }, :default_url => 'picture_missing.png',
         :storage => :s3,
         :bucket => "bucket_name_for_dev",
         :s3_credentials => Rails.root.join("config/aws.yml"),
         :path => "/presentation_pictures/:id/:style/:filename",
         :url  => ":s3_eu_url"

    attr_accessible :picture
    attr_accessor :picture_url

When trying to upload a file, I get the error:

AWS::S3::Errors::SignatureDoesNotMatch The request signature we calculated does not match the signature you provided. Check your key and signing method.

I verified that my keys are accessible and set to the right value.

Here is also what I get from console:

    [paperclip] Saving attachments.
    [paperclip] saving /presentation_pictures/43/original/Image_1.png
    [AWS S3 200 0.813272 0 retries] put_object(:acl=>:public_read,:bucket_name=>"*******_dev",:content_type=>"image/png",:data=>#<Paperclip::UploadedFileAdapter:0x2e144b4 @target=#<ActionDispatch::Http::UploadedFile:0x2dbb1fc @original_filename="Image 1.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"presentation_picture[picture]\"; filename=\"Image 1.png\"\r\nContent-Type: image/png\r\n", @tempfile=#<File:/var/folders/tb/tbmv4LE9EwGNPr1QqU2S0E+++TI/-Tmp-/RackMultipart20120407-33502-1gajfe9>>, @tempfile=#<File:/var/folders/tb/tbmv4LE9EwGNPr1QqU2S0E+++TI/-Tmp-/Image 1.png20120407-33502-an4dcy>>,:key=>"presentation_pictures/43/original/Image_1.png")

Do you have any idea from where could come this problem? Thx

Answer 1

I had the same issue. It turned out I was using the correct access key id but my secret key was copied incorrectly.

Double checking my secret key and correcting it fixed it for me.