I ve spent three days now trying to set up a simple posting form to amazon s3. Everytime I get this error:

SignatureDoesNotMatchThe request signature we calculated does not match the signature you provided. Check your key and signing method.

我没看到问题所在。

<?php
        $form = array(
             key                        =>  queue/1_1_1234567890.wmv ,
             AWSAccessKeyId             =>  mypublickeyishere ,
             acl                        =>  public-read ,
             success_action_redirect    =>  http://someurl.com ,
        );

        $form[ policy ] =  {
            "expiration": "2015-12-01T12:00:00.000Z",
                "conditions": [
                    {
                        "acl": " .$form[ acl ]. "
                    },
                    {
                        "success_action_redirect": " .$form[ success_action_redirect ]. "
                    },
                    {
                        "bucket": "thenameofmybucket"
                    },
                    [
                        "starts-with",
                        "$key",
                        "queue/"
                    ]
                ]
            } ;

    $form[ policy_encoded ] = base64_encode($form[ policy ]);
    $form[ signature ] = base64_encode(hash_hmac(  sha1 , base64_encode(utf8_encode($form[ policy ])),  F90mc5kpjuNMPg8XG7iV6bxOzacYhktcw+RVGzpZ ));

?>


<form action="https://thenameofmybucket.s3.amazonaws.com/" method="post" enctype="multipart/form-data">
      <input type="hidden" name="key" value="<?php echo $form[ key ] ?>">
      <input type="hidden" name="AWSAccessKeyId" value="<?php echo $form[ AWSAccessKeyId ] ?>">
      <input type="hidden" name="acl" value="<?php echo $form[ acl ] ?>">
      <input type="hidden" name="success_action_redirect" value="<?php echo $form[ success_action_redirect ] ?>">
      <input type="hidden" name="policy" value="<?php echo $form[ policy_encoded ] ?>">
      <input type="hidden" name="signature" value="<?php echo $form[ signature ] ?>">

      File to upload to S3:
      <input name="file" type="file">
      <br>
      <input type="submit" value="Upload File to S3">
</form>

我替换了桶名以及上面的私人和公共钥匙。

I followed the instruction to sign the policy meticulously: http://docs.amazonwebservices.com/AmazonS3/2006-03-01/dev/HTTPPOSTForms.html#HTTPPOSTConstructPolicy

我错过什么了 为什么密码不起作用