AWS S3 - How to fix The request signature we calculated does not match the signature error

Question

I have searched on the web for over two days now  and probably have looked through most of the online documented scenarios and workarounds  but nothing worked for me so far   I am on AWS SDK for PHP V2 8 7 running on PHP 5 3   I am trying to connect to my S3 bucket with the following code      Create a  Aws  object using a configuration file           aws   Aws  factory  config php                Get the client from the service locator by namespace          s3Client    aws- gt get  s3              bucket    xxx            keyname    xxx            try                result    s3Client- gt putObject array                   Bucket           gt        bucket                   Key              gt        keyname                   Body             gt        Hello World                                file error   false            catch  Exception  e                 file error   true              echo  e- gt getMessage                die                             My config php file is as follows    lt  php  return array         Bootstrap the configuration file with AWS specific features      includes    gt  array   aws         services    gt  array             All AWS clients extend from  default settings   Here we are            overriding  default settings  with our default credentials and            providing a default region setting           default settings    gt  array               params    gt  array                   credentials    gt  array                       key       gt   key                        secret    gt   secret                                                       It is producing the following error      The request signature we calculated does not match the signature you provided  Check your key and signing method    I ve already checked my access key and secret at least 20 times  generated new ones  used different methods to pass in the information  i e  profile and including credentials in code  but nothing is working at the moment

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I solved this issue by adding apiVersion inside AWS S3    then it works perfectly for S3 signed url   Change from  var s3   new AWS S3      to  var s3   new AWS S3  apiVersion   2006-03-01       For more detailed examples  can refer to this AWS Doc SDK Example  https   github com awsdocs aws-doc-sdk-examples blob master javascript example code s3 s3 getsignedurl js

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I just experienced this uploading an image to S3 using the AWS SDK with React Native  It turned out to be caused by the ContentEncoding parameter   Removing that parameter  fixed  the issue

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In a previous version of the aws-php-sdk  prior to the deprecation of the S3Client  factory   method  you were allowed to place part of the file path  or Key as it is called in the S3Client- gt putObject   parameters  on the bucket parameter  I had a file manager in production use  using the v2 SDK  Since the factory method still worked  I did not revisit this module after updating to  3 70 0  Today I spent the better part of two hours debugging why I had started receiving this error  and it ended up being due to the parameters I was passing  which used to work     s3Client   new S3Client        profile    gt   default        region    gt   us-east-1        version    gt   2006-03-01       result    s3Client- gt putObject        Bucket    gt   awesomecatpictures catsinhats        Key    gt   whitecats white cat in hat1 png        SourceFile    gt    tmp asdf1234        I had to move the catsinhats portion of my bucket key path to the Key parameter  like so    s3Client   new S3Client        profile    gt   default        region    gt   us-east-1        version    gt   2006-03-01       result    s3Client- gt putObject        Bucket    gt   awesomecatpictures        Key    gt   catsinhats whitecats white cat in hat1 png        SourceFile    gt    tmp asdf1234        What I believe is happening is that the Bucket name is now being URL Encoded  After further inspection of the exact message I was receiving from the SDK  I found this   Error executing PutObject on https   s3 amazonaws com awesomecatpictures 2Fcatsinhats whitecats white cat in hat1 png  AWS HTTP error  Client error  PUT https   s3 amazonaws com awesomecatpictures 2Fcatsinhats whitecats white cat in hat1 png resulted in a 403 Forbidden  This shows that the   I provided to my Bucket parameter has been through urlencode   and is now  2F   The way the Signature works is fairly complicated  but the issue boils down to the bucket and key are used to generate the encrypted signature  If they do not match exactly on both the calling client  and within AWS  then the request will be denied with a 403  The error message does actually point out the issue      The request signature we calculated does not match the signature you   provided  Check your key and signing method    So  my Key was wrong because my Bucket was wrong

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In my case the bucketname was wrong  it included the first part of the key  bucketxxx keyxxx  - there was nothing wrong with the signature

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I had the same error in nodejs  But adding signatureVersion in s3 constructor helped me    const s3   new AWS S3     apiVersion   2006-03-01     signatureVersion   v4

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I encountered this in a Docker image  with a non-AWS S3 endpoint  when using the latest awscli version available to Debian stretch  i e  version 1 11 13   Upgrading to CLI version 1 16 84 resolved the issue   To install the latest version of the CLI with a Dockerfile based on a Debian stretch image  instead of   RUN apt-get update RUN apt-get install -y awscli RUN aws --version   Use   RUN apt-get update RUN apt-get install -y python-pip RUN pip install awscli RUN aws --version

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After two days of debugging  I finally discovered the problem     The key I was assigning to the object started with a period i e     images ABC jpg  and this caused the error to occur   I wish the API provides more meaningful and relevant error message  alas  I hope this will help someone else out there

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Most of the time it happens because of the wrong key  AWS SECRET ACCESS KEY   Please cross verify your AWS SECRET ACCESS KEY  Hope it will work

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Weirdly I previously had an error The authorization mechanism you have provided is not supported  Please use AWS4-HMAC-SHA256  There was an answer on Stackoverflow which required to add AWS S3 REGION NAME    eu-west-2   your region   AWS S3 SIGNATURE VERSION    quot s3v4  After doing that the previous error cleared but I ended up with this signature error again  Searched for answers until I ended up removing the AWS S3 SIGNATURE VERSION    quot s3v4 Then it worked  Placed it here maybe it might help someone  I am using Django by the way

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After debugging and spending a lot of time  in my case  the issue was with the access key id and secret access key  just double check your credentials or generate new one if possible and make sure you are passing the credentials in params

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If none of the other mentioned solution works for you   then try using  aws configure   this command will open a set of options asking for keys  region and output format   Hope this helps

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I got this error while trying to copy an object  I fixed it by encoding the copySource  This is actually described in the method documentation      Params    copySource     The name of the source bucket and key name of the source object  separated by a slash      Must be URL-encoded    CopyObjectRequest objectRequest   CopyObjectRequest builder                    copySource URLEncoder encode bucket         oldFileKey   UTF-8                     destinationBucket bucket                   destinationKey newFileKey                   build

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Just to add to the many different ways this can show up    If you using safari on iOS and you are connected to the Safari Technology Preview console - you will see the same problem  If you disconnect from the console - the problem will go away     Of course it makes troubleshooting other issues difficult but it is a 100  repro   I am trying to figure out what I can change in STP to stop it from doing this but have not found it yet

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I had to set   Aws config update     credentials  Aws  Credentials new access key id  secret access key       before with the ruby aws sdk v2  there is probably something similiar to this in the other languages as well

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I had the same issue  I had the default method  PUT set to define the pre-signed URL but was trying to perform a GET  The error was due to method mismatch

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I don t know if anyone came to this issue while trying to test the outputted URL in browser but if you are using Postman and try to copy the generated url of AWS from the RAW tab  because of escaping backslashes you are going to get the above error    Use the Pretty tab to copy and paste the url to see if it actually works   I run into this issue recently and this solution solved my issue  It s for testing purposes to see if you actually retrieve the data through the url   This answer is a reference to those who try to generate a download  temporary link from AWS or generally generate a URL from AWS to use

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My AccessKey had some special characters in that were not properly escaped  I didn t check for special characters when I did the copy paste of the keys  Tripped me up for a few mins  A simple backslash fixed it  Example  not my real access key obviously   secretAccessKey   Gk JCK77STMU6VWGrVYa1rmZiq Mn98OdpJRNV614tM  becomes secretAccessKey   Gk  JCK77STMU6VWGrVYa1rmZiq  Mn98OdpJRNV614tM

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For Python set - signature version s3v4 s3   boto3 client      s3      aws access key id  AKIAIO5FODNN7EXAMPLE      aws secret access key  ABCDEF c2L7yXeGvUyrPgYsDnWRRC1AYEXAMPLE      config Config signature version  s3v4

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I had the same issue  the problem I had was I imported the wrong environment variable  which means that my secret key for AWS was wrong  Based on reading all the answers  I would verify that all your access ID and secret key is right and there are no additional characters or anything

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Got this error while uploading document to CloudSearch through Java SDK  The issue was because of a special character in the document to be uploaded  The error  The request signature we calculated does not match the signature you provided  Check your AWS Secret Access Key and signing method   is very misleading

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In my case I was using s3 getSignedUrl  getObject   when I needed to be using s3 getSignedUrl  putObject    because I m using a PUT to upload my file   which is why the signatures didn t match

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Another possible issue might be that the meta values contain non US-ASCII characters  For me it helped to UrlEncode the values when adding them to the putRequest   request Metadata Add AmzMetaPrefix    artist   HttpUtility UrlEncode song Artist    request Metadata Add AmzMetaPrefix    title   HttpUtility UrlEncode song Title

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Actually in Java i was getting same error After spending 4 hours to debug it what i found that that the problem was in meta data in S3 Objects as there was space while sitting cache controls in s3 files This space was allowed in 1 6   version but in 1 11   it is disallowed and thus was throwing the signature mismatch error

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Like others have said  I had this exact same problem and it turned out to be related to the password   access secret  I generated a password for my s3 user that was not valid  and it didn t inform me  When trying to connect with the user  it gave this error  It doesn t seem to like certain or all symbols in passwords  at least for Minio

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In my case I had to wait for a couple of hours between uploading files into the bucket and generating pre-signed URLs for them

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generating a fresh access key worked for me

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This mostly happens when you take a SECRET key and pass it to elastic client   e g   Secret Key  ABCW1233   OxMMMMMMM8x    While configuring in the client  You should only pass  ABCW1233   The part before the   sign

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I could solve this issue with setting environment variables    export AWS ACCESS KEY  export AWS SECRET ACCESS KEY    In IntelliJ   py test  I set environment variables with  Run   gt   Edit Configurations   gt   Configuration   gt   Environment   gt   Environment variables

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I had a similar error  but for me it seemed to be caused by re-using an IAM user to work with S3 in two different Elastic Beanstalk environments   I treated the symptom by creating an identically permissioned IAM user for each environment and that made the error go away

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In my case  I was using S3  uppercase  as service name when making request using postman in AWS signature Authorization method

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This error seems to occur mostly if there is a space before or after your secret key

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The issue in my case was the API Gateway URL used to configure Amplify that had an extra slash at the end      The queried url looked like https       amazonaws com myapi  myendpoint  I removed the extra slash in the conf and it worked    Not the most explicit error message of my life

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I got this when I had quotes around the key in    aws credentials   aws secret access key    KEY

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I am getting the same error Due to following reason   I have entered right credentials but with copy-paste  So that may b issue of junk characters insertion while copy paste   I have entered manually and ran the code and now its working fine  Thank You

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I had the same problem when tried to copy an object with some UTF8 characters  Below is a JS example   var s3   new AWS S3     s3 copyObject       Bucket   somebucket       CopySource   path to Weird file name   O  pi  u jpg       Key   destination key jpg       ACL   authenticated-read     cb     Solved by encoding the CopySource with encodeURIComponent

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I get this error with the wrong credentials  I think there were invisible characters when I pasted it originally

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For me I used axios and by deafult it sends header  content-type  application x-www-form-urlencoded   so i change to send   content-type  application octet-stream   and also had to add this Content-Type to AWS signature  const params         Bucket  bucket      Key  key      Expires  expires      ContentType    application octet-stream     const s3   new AWS S3   s3 getSignedUrl  putObject   params

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In my case  python  it failed because I had these two lines of code in the file  inherited from an older code  http client HTTPConnection  http vsn   10 http client HTTPConnection  http vsn str    HTTP 1 0

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In my case I was calling s3request promise   then   incorreclty which caused two executions of the request happening when only one call was done    What I mean is that I was iterating through 6 objects but 12 requests were made  you can check by logging in the console or debuging network in the browser   Since the timestamp for the second  unwanted  request did not match the signture of the firs one this produced this issue

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In my case I parsed an S3 url into its components   For example   Url     s3   bucket-name path to file   Was parsed into   Bucket  bucket-name Path     path to file   Having the path part containing a leading     failed the request

[amazon-web-services] AWS S3 - How to fix 'The request signature we calculated does not match the signature' error?

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