Posting images to AWS S3 with QNetworkAccessManager PUT (Android)

[marinadel]

I am trying to get my android app (qt5 c++) to upload taken pictures to an amazon bucket using PUT method but keep getting errors about calculated signature not matching the one provided.

here's my code:

QFile * fileData = new QFile(path, this);
  if (fileData->open(QIODevice::ReadOnly))
  {
    QFileInfo fileInfo(fileData->fileName());
 
    QByteArray AccessKey = "SOMEACCESKEY";
    QByteArray SecretKey = "SOMESECRETKEY";
    QByteArray DayOfWeek = QDateTime::currentDateTime().date().toString("ddd").toUtf8();
    QByteArray RFCDate = DayOfWeek + ", " + QDateTime::currentDateTime().toString(Qt::RFC2822Date).toUtf8();
    QByteArray S3Bucket = "somes3bucket";
    QByteArray S3region = "us-east-1";
    QByteArray ContentType = "image/jpeg";
    QByteArray StringToSign = "PUT\\n\\n" + ContentType + "\\n" + RFCDate + "\\n" + "/" + S3Bucket + "/" + fileInfo.fileName().toUtf8();
 
    QByteArray SignString = QMessageAuthenticationCode::hash(StringToSign, SecretKey, QCryptographicHash::Sha1).toBase64();
 
    QNetworkAccessManager * networkAccessManager = new QNetworkAccessManager(this);
 
    QNetworkRequest request(QUrl("https://" + S3Bucket + ".s3." + S3region + ".amazonaws.com/" + fileInfo.fileName()));
    request.setHeader(QNetworkRequest::ContentTypeHeader, ContentType);
    request.setHeader(QNetworkRequest::ContentLengthHeader, fileInfo.size());
    request.setRawHeader("Host", S3Bucket + ".s3." + S3region + ".amazonaws.com");
    request.setRawHeader("Date", RFCDate);
    request.setRawHeader("Authorization", "AWS " + AccessKey + ":" + SignString);
 
    m_reply = networkAccessManager->put(request, fileData);
    connect(m_reply, SIGNAL(finished()), this, SLOT(mySlot()));
}

QFile * fileData = new QFile(path, this);
  if (fileData->open(QIODevice::ReadOnly))
  {
    QFileInfo fileInfo(fileData->fileName());

    QByteArray AccessKey = "SOMEACCESKEY";
    QByteArray SecretKey = "SOMESECRETKEY";
    QByteArray DayOfWeek = QDateTime::currentDateTime().date().toString("ddd").toUtf8();
    QByteArray RFCDate = DayOfWeek + ", " + QDateTime::currentDateTime().toString(Qt::RFC2822Date).toUtf8();
    QByteArray S3Bucket = "somes3bucket";
    QByteArray S3region = "us-east-1";
    QByteArray ContentType = "image/jpeg";
    QByteArray StringToSign = "PUT\\n\\n" + ContentType + "\\n" + RFCDate + "\\n" + "/" + S3Bucket + "/" + fileInfo.fileName().toUtf8();

    QByteArray SignString = QMessageAuthenticationCode::hash(StringToSign, SecretKey, QCryptographicHash::Sha1).toBase64();

    QNetworkAccessManager * networkAccessManager = new QNetworkAccessManager(this);

    QNetworkRequest request(QUrl("https://" + S3Bucket + ".s3." + S3region + ".amazonaws.com/" + fileInfo.fileName()));
    request.setHeader(QNetworkRequest::ContentTypeHeader, ContentType);
    request.setHeader(QNetworkRequest::ContentLengthHeader, fileInfo.size());
    request.setRawHeader("Host", S3Bucket + ".s3." + S3region + ".amazonaws.com");
    request.setRawHeader("Date", RFCDate);
    request.setRawHeader("Authorization", "AWS " + AccessKey + ":" + SignString);

    m_reply = networkAccessManager->put(request, fileData);
    connect(m_reply, SIGNAL(finished()), this, SLOT(mySlot()));
}

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here's the error msg I am getting when reading m_reply->readAll():

<Code>SignatureDoesNotMatch</?Code>
<Message>The request signature we calculated does not match the signature you provided.? Check your key and signing method.?</?Message>


any help is much appreciated!