Aws::AwsError: SignatureDoesNotMatch

I am trying to copy all contents in bucket b1 to bucket b2.

S3ID = 'id_here'
S3KEY = 'key_here'
SRCBUCKET = 'b1'
DESTBUCKET = 'b2'

bucket_logger ||= Logger.new("#{Rails.root}/log/bucket.log")
bucket_logger.info "Time started #{Time.now}"

s3 = RightAws::S3Interface.new(S3ID, S3KEY)
s3.incrementally_list_bucket(SRCBUCKET) do |h|
  h[:contents].each do |o|
    bucket_logger.info "Copying #{o[:key]}"
    # s3.copy(SRCBUCKET, o[:key], DESTBUCKET, o[:key])
  end
end

bucket_logger.info "Time ended #{Time.now}"

It starts copying some of the files. I can verify the output in the log file and the files in the bucket. And then it hits this error:

Opening new HTTPS connection to b1.s3.amazonaws.com:443
Closing HTTPS connection to b1.s3.amazonaws.com:443
Opening new HTTPS connection to b1.s3.amazonaws.com:443
##### Aws::S3Interface returned an error: 403 Forbidden
<?xml version="1.0" encoding="UTF-8"?>
<Error><Code>SignatureDoesNotMatch</Code><Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message><StringToSignBytes>47 45 54 0a 0a 0a 54 75 65 2c 20 30 32 20 4a 75 6c 20 32 30 31 33 20 31 30 3a 33 35 3a 32 34 20 47 4d 54 0a 2f 74 77 69 74 6d 75 73 69 63 73 74 61 67 69 6e 67 2f</StringToSignBytes><RequestId>4B4D7951B3DC32D1</RequestId><HostId>oCZMLVNwCQh689ShjOWgJqVg5OnUOrogzGDQ5jPY6Z5vrzmrcyfJkofZ5ppfGUin</HostId><SignatureProvided>/jsAfXRbb0ZOslgbB8XnIOllzns=</SignatureProvided><StringToSign>GET

Tue, 02 Jul 2013 10:35:24 GMT
/b1/</StringToSign><AWSAccessKeyId>actual key here</AWSAccessKeyId></Error> #####
##### Aws::S3Interface request: b1.s3.amazonaws.com:443/?marker=assets%2Fglyphicons%2Fstandard%2Fglyphicons_262_spade%402x-996bbd6e7303a36b5f0a33174a982648.png ####
Closing HTTPS connection to b1.s3.amazonaws.com:443
Aws::AwsError: SignatureDoesNotMatch: The request signature we calculated does not match the signature you provided. Check your key and signing method.
REQUEST=b1.s3.amazonaws.com:443/?marker=assets%2Fglyphicons%2Fstandard%2Fglyphicons_262_spade%402x-996bbd6e7303a36b5f0a33174a982648.png 
  from /Users/Chris/.rvm/gems/ruby-1.9.3-p392/bundler/gems/aws-f136acf02221/lib/awsbase/awsbase.rb:572:in `request_info_impl'
  from /Users/Chris/.rvm/gems/ruby-1.9.3-p392/bundler/gems/aws-f136acf02221/lib/awsbase/awsbase.rb:316:in `request_info2'
  from /Users/Chris/.rvm/gems/ruby-1.9.3-p392/bundler/gems/aws-f136acf02221/lib/awsbase/awsbase.rb:338:in `request_info3'
  from /Users/Chris/.rvm/gems/ruby-1.9.3-p392/bundler/gems/aws-f136acf02221/lib/s3/s3_interface.rb:186:in `request_info'
  from /Users/Chris/.rvm/gems/ruby-1.9.3-p392/bundler/gems/aws-f136acf02221/lib/s3/s3_interface.rb:349:in `incrementally_list_bucket'
  from (irb):30
  from /Users/Chris/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.11/lib/rails/commands/console.rb:47:in `start'
  from /Users/Chris/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.11/lib/rails/commands/console.rb:8:in `start'
  from /Users/Chris/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.11/lib/rails/commands.rb:41:in `<top (required)>'
  from script/rails:6:in `require'
  from script/rails:6:in `<main>'

flexera-public / right_aws

Aws::AwsError: SignatureDoesNotMatch #171