s3_backups.sh

# Povides a function that allows files to be uploaded to an Amazon S3 bucket
function upload_to_s3 {
  
  # Definitions
  bucket=<bucket name>
  resource=$2/`basename $1`
  content_type="application/x-compressed"
  date=`date -R`
  md5=`openssl dgst -md5 -binary "$1" | openssl enc -e -base64`

  s3_key=<key>
  s3_secret=<secret>
  
  sigstring="PUT\n${md5}\n${content_type}\n${date}\nx-amz-server-side-encryption:AES256\n/${bucket}/${resource}"
  signature=`echo -en ${sigstring} | openssl sha1 -hmac ${s3_secret} -binary | base64`
  
  echo "Uploading $1 to $2..."

  curl -X PUT -T "$1" \
    -H "Host: ${bucket}.s3.amazonaws.com" \
    -H "Date: ${date}" \
    -H "Content-Type: $content_type" \
    -H "Content-MD5: $md5" \
    -H "Authorization: AWS ${s3_key}:${signature}" \
    -H "x-amz-server-side-encryption: AES256" \
    https://${bucket}.s3.amazonaws.com/$resource

}