将表单数据发布到Amazon S3存储桶

Question

我花了三天时间试图为亚马逊s3设置一个简单的发布表格.每次我收到此错误:

SignatureDoesNotMatch我们计算的请求签名与您提供的签名不匹配.检查您的密钥和签名方法.

我没有看到问题.:-(

<?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>

我替换了桶名称以及上面的私钥和公钥.

我按照指示一丝不苟地签署了该政策:http: //docs.amazonwebservices.com/AmazonS3/2006-03-01/dev/HTTPPOSTForms.html#HTTPPOSTConstructPolicy

我错过了什么？为什么代码不起作用？

Answer 1

没有那个库,你只是缺少一个参数.问题是你没有设置hash_hmac函数来输出二进制数据.为此,请将第四个参数设置为true:

$signature = base64_encode(hash_hmac('sha1', $policy_b64, $secret, true));

如果您未设置此选项,则不会按照AWS预期的方式对签名进行编码.

Answer 2

好的，我终于设法使用此示例代码库完成了这项工作： http://aws.amazon.com/code/Amazon-S3/1618