通过加密S3存储桶上的预签名url返回的putObject返回的签名不匹配

Question

我有一个无服务器的aws lambda，它将通过预先签名的URL将对象获取/放入加密的S3存储桶。getObject工作得很好。一旦我加密存储桶，putObject就会生成SignatureDesNotMatch错误，我无法理解原因。我玩过头球之类的游戏，但仍然无法让它发挥作用。守则/政策如下：

λ

    const generatepresignedurl = (req, res, callback) => {

    var fileurls = [];
    const body = JSON.parse(req.body);
    const theBucket = body['theBucket'];
    const theKey = body['theKey'];
    const theContentType = body['theContentType'];
    const theOperation = body['theOperation'];

    /*setting the presigned url expiry time in seconds, also check if user making the request is an authorized user
     for your app (this will be specific to your app’s auth mechanism so i am skipping it)*/
    const signedUrlExpireSeconds = 60 * 60;

    if (theOperation == 'getObject') {
        var params = {
            Bucket: theBucket,
            Key: theKey,
            Expires: signedUrlExpireSeconds
        };
    } else {
        var params = {
            Bucket: theBucket,
            Key: theKey,
            Expires: signedUrlExpireSeconds,
            ACL: 'bucket-owner-full-control',
            ContentType: theContentType,
            ServerSideEncryption: 'AES256'
        };
    }

    s3.getSignedUrl(theOperation, params, function (err, url) {
        if (err) {
            console.log('Error Getting Presigned URL from AWS S3');
            // callback(null, ({ success: false, message: 'Pre-Signed URL error', urls: fileurls }));
            callback(null, {error: err});
        }
        else {
            fileurls[0] = url;
            console.log('Presigned URL: ', fileurls[0]);
            callback(null, { success: true, message: 'AWS SDK S3 Pre-signed urls generated successfully.', urls: fileurls });
        }
    });

}

呼叫代码如下：

生成预签名URL

Function callStandAloneAWSService(lambda As String, request As String, contentType As String) As String

    Dim httpserver As New MSXML2.XMLHTTP

    With httpserver

        Dim theURL As String
        theURL = AWS_WEBSERVICE_URL_DEV

        .Open "POST", theURL & lambda 'variable that contains generatepresignedurl

        .setRequestHeader "Content-type", contentType

        .send request

        Do: DoEvents: Loop Until .readyState = 4 'make sure we are ready to recieve response

        callStandAloneAWSService = .responseText

    End With

End Function

上传到PreSigned URL（原始问题没有serversid加密头）

Function uploadToPreSignedURL(url As String, whichFile As String, contentType) As Boolean

    'code to create binaryFile

    Dim httpserver As New MSXML2.XMLHTTP

    With httpserver

        .Open "POST", url
        .setRequestHeader "Content-type", "text/plain" 'contentType
        .send binaryFile
        Do: DoEvents: Loop Until .readyState = 4 'make sure we are ready to recieve response

        If Len(.responseText) = 0 Then

            uploadToPreSignedURL = True

        Else

            'extract error message from xml and write to report mail

        End If

    End With

End Function

桶政策

{
    "Version": "2012-10-17",
    "Id": "S3PolicyId1",
    "Statement": [
        {
            "Sid": "DenyIncorrectEncryptionHeader",
            "Effect": "Deny",
            "Principal": "*",
            "Action": "s3:PutObject",
            "Resource": "arn:aws:s3:::mybiggetybucket/*",
            "Condition": {
                "StringNotEquals": {
                    "s3:x-amz-server-side-encryption": "AES256"
                }
            }
        },
        {
            "Sid": "DenyUnEncryptedObjectUploads",
            "Effect": "Deny",
            "Principal": "*",
            "Action": "s3:PutObject",
            "Resource": "arn:aws:s3:::mybiggetybucket/*",
            "Condition": {
                "Null": {
                    "s3:x-amz-server-side-encryption": "true"
                }
            }
        }
    ]
}

FWIW，我可以通过aws cli运行这个并让它工作：

aws s3api put对象--bucket mybiggetybucket--key test.json--body package-lock.json--服务器端加密“AES256”

Answer 1

要引用服务器端加密文档，请执行以下操作：

您不能对使用预签名URL上载的对象强制执行SSE-S3加密。只能使用AWS管理控制台或HTTP请求头指定服务器端加密。有关详细信息，请参见在策略中指定条件。

我能够得到类似的工作。我需要使用PUT而不是POST，我需要提供x-amz-server-side-encryption:AES256作为标题，如下所示：

const axios = require('axios');
const AWS = require('aws-sdk');

const s3 = new AWS.S3();

const params = {
  Bucket: 'mybucket',
  Key: 'myfolder/myfile.txt',
  Expires: 60 * 60,
  ACL: 'bucket-owner-full-control',
  ContentType: 'text/plain',
  ServerSideEncryption: 'AES256',
};

const axiosConfig = {
  headers: {
    'Content-Type': 'text/plain',
    'x-amz-server-side-encryption': 'AES256',
  },
};

const uploadTextFile = (presignedurl) => {
  axios.put(presignedurl, 'some text here', axiosConfig).then((res) => {
    console.log('File uploaded');
  }).catch((error) => {
    console.error(error);
  });
};

s3.getSignedUrl('putObject', params, (err, url) => {
  if (err) {
    console.error(err);
  } else {
    console.log('Pre-signed URL:', url);
    uploadTextFile(url);
  }
});