Digital Ocean Spaces Signing Request

gistfile1.txt

require 'openssl'
require 'base64'
require 'digest'

SECRET_KEY = "9qVrrCk/9OtL5tD9fLASOtFQvbDo74oRh6JUeb0zprQ"
ACCESS_KEY = "PXCXJJK6N7T3S4HSDKQH"

request_timestamp = Time.now.utc

canonicalRequest = ""
canonicalRequest += "GET\n"
canonicalRequest += "/\n"
canonicalRequest += "\n"
canonicalRequest += "host:cp-space-test.nyc3.digitaloceanspaces.com\n"
canonicalRequest += "x-amz-content-sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855\n"
canonicalRequest += "x-amz-date:#{request_timestamp.strftime("%Y%m%dT%H%M%SZ")}\n"
canonicalRequest += "\n"
canonicalRequest += "host;x-amz-content-sha256;x-amz-date\n"
canonicalRequest += "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"

sha_of_canonicalRequest = (Digest::SHA256::new << canonicalRequest).hexdigest

stringToSign = "AWS4-HMAC-SHA256" + "\n"
stringToSign += request_timestamp.strftime("%F") + "\n"
stringToSign += request_timestamp.strftime("%Y%m%d") + "/nyc3/s3/aws4_request\n"
stringToSign += sha_of_canonicalRequest

dateKey = OpenSSL::HMAC.digest(OpenSSL::Digest::Digest.new('sha256'), "AWS4#{SECRET_KEY}", request_timestamp.strftime("%Y%m%d"))
dateRegionKey = OpenSSL::HMAC.digest(OpenSSL::Digest::Digest.new('sha256'), dateKey, "nyc3")
dateRegionServiceKey = OpenSSL::HMAC.digest(OpenSSL::Digest::Digest.new('sha256'), dateRegionKey, "s3")
signingKey = OpenSSL::HMAC.digest(OpenSSL::Digest::Digest.new('sha256'), dateRegionServiceKey, "aws4_request")

signature = OpenSSL::HMAC.hexdigest(OpenSSL::Digest::Digest.new('sha256'), signingKey, stringToSign)

puts "Request:"
puts
puts "GET /"
puts "Host: cp-space-test.nyc3.digitaloceanspaces.com"
puts "X-Amz-Content-Sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
puts "X-Amz-Date: #{request_timestamp.strftime("%Y%m%dT%H%M%SZ")}"
puts "Authorization: AWS4-HMAC-SHA256 Credential=#{ACCESS_KEY}/#{request_timestamp.strftime("%Y%m%d")}/nyc3/s3/aws4_request,SignedHeaders=host;x-amz-acl;x-amz-content-sha256;x-amz-date,Signature=#{signature}"
puts