s3upload script for uploading backups from a really old server

s3upload.sh

#!/bin/bash

# Configuration
# ACCESS_KEY="YOUR_ACCESS_KEY"
# SECRET_KEY="YOUR_SECRET_KEY"
# BUCKET="your-bucket-name"
# REGION="your-region"
# SUBPATH="your-subpath"

# Function to upload a file
upload_file() {
  FILE_PATH="$1"
  FILE_NAME=$(basename "$FILE_PATH")
  DATE=$(date -u +"%Y%m%dT%H%M%SZ")

  # Create signature
  STRING_TO_SIGN="PUT\n\n${CONTENT_TYPE}\n${DATE}\n/${BUCKET}/${SUBPATH}/${FILE_NAME}"
  SIGNATURE=$(echo -en ${STRING_TO_SIGN} | openssl sha1 -hmac ${SECRET_KEY} -binary | base64)

  # Upload
  curl -X PUT -T "${FILE_PATH}" \
    -H "Date: ${DATE}" \
    -H "Authorization: AWS ${ACCESS_KEY}:${SIGNATURE}" \
    "https://${BUCKET}.s3.${REGION}.amazonaws.com/${SUBPATH}/${FILE_NAME}"
}

# Usage
if [ -z "$1" ]; then
  echo "Usage: $0 /path/to/file"
  exit 1
fi

upload_file "$1"