csexton/ButtonGenerator.rb

## README
Originally from http://aws.amazon.com/code/Ruby/3007

## ButtonGenerator.rb

################################################################################
#  Copyright 2008-2010 Amazon Technologies, Inc
#  Licensed under the Apache License, Version 2.0 (the "License");
#
#  You may not use this file except in compliance with the License.
#  You may obtain a copy of the License at: http://aws.amazon.com/apache2.0
#  This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
#  CONDITIONS OF ANY KIND, either express or implied. See the License for the
#  specific language governing permissions and limitations under the License.
################################################################################


require 'ButtonGenerator'

module Amazon
module FPS

class MarketplacePayButtonSample

   @@accessKey = "<insert-access-key>";                             #Put your Access Key here
   @@secretKey = "<insert-secret-key>";                             #Put  your Secret Key here
   @@amount="USD 1.1";                                               #Enter the amount you want to collect for the item
   @@signatureMethod="HmacSHA256";                                   #Valid values are  HmacSHA256 and HmacSHA1.
   @@description="Test Widget";                                       #Enter a description of the item
   @@referenceId="test-reference123";                                 #Optionally, enter an ID that uniquely identifies this transaction for your records
   @@abandonUrl="http://yourwebsite.com/cancel.html";                 #Optionally, enter the URL where senders should be redirected if they cancel their transaction
    @@returnUrl="http://yourwebsite.com/return.html";                  #Optionally enter the URL where buyers should be redirected after they complete the transaction
    @@immediateReturn="0";                                             #Optionally, enter "1" if you want to skip the final status page in Amazon Payments
    @@processImmediate="1";                                            #Optionally, enter "1" if you want to settle the transaction immediately else "0". Default value is "1"
    @@ipnUrl="http://yourwebsite.com/ipn";                             #Optionally, type the URL of your host page to which Amazon Payments should send the IPN transaction information.
    @@collectShippingAddress=nil;                                      #Optionally, enter "1" if you want Amazon Payments to return the buyer's shipping address as part of the transaction information
     @@recipientEmail = "new_ngo@amazon.com";                  		#Enter the e-mail address for the seller
     @@fixedMarketplaceFee ="0.01";                                     #Optionally, enter the fixed market place fee
     @@variableMarketplaceFee = "4" ;                                   #Optionally, enter the variable market place fee

    @@environment="sandbox";                                            #Valid values are "sandbox" or "prod"


  def self.sample_form()
	Amazon::FPS::ButtonGenerator.generate_marketplace_pay_button_form( @@accessKey, @@secretKey, @@amount,  @@description,  @@referenceId, @@immediateReturn,@@returnUrl,  @@abandonUrl,  @@processImmediate, @@ipnUrl,@@collectShippingAddress, @@signatureMethod,@@recipientEmail,@@fixedMarketplaceFee, @@variableMarketplaceFee, @@environment)
	rescue Exception => msg
                puts msg

  end


end

end
end

Amazon::FPS::MarketplacePayButtonSample.sample_form()

## LICENSE
Apache License
Version 2.0, January 2004

TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

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END OF TERMS AND CONDITIONS

## MarketplacePayButtonSample.rb


################################################################################
#  Copyright 2008-2010 Amazon Technologies, Inc
#  Licensed under the Apache License, Version 2.0 (the "License");
#
#  You may not use this file except in compliance with the License.
#  You may obtain a copy of the License at: http://aws.amazon.com/apache2.0
#  This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
#  CONDITIONS OF ANY KIND, either express or implied. See the License for the
#  specific language governing permissions and limitations under the License.
################################################################################


require 'uri'
require 'SignatureUtils'

module Amazon
module FPS

class ButtonGenerator

  @@app_name = "ASP"
  @@ASPhttp_method = "POST"
  @@CBUIhttp_method = "POST"
  @@CBUI_REQUEST_URI = "/cobranded-ui/actions/start";
  @@SANDBOX_END_POINT = "https://authorize.payments-sandbox.amazon.com/pba/paypipeline";
  @@SANDBOX_IMAGE_LOCATION="https://authorize.payments-sandbox.amazon.com/pba/images/payNowButton.png";
  @@SANDBOX_MP_IMAGE_LOCATION = "https://authorize.payments-sandbox.amazon.com/pba/images/MarketPlaceFeeWithLogo.png";

  @@PROD_END_POINT = "https://authorize.payments.amazon.com/pba/paypipeline";
  @@PROD_IMAGE_LOCATION="https://authorize.payments.amazon.com/pba/images/payNowButton.png";
  @@PROD_MP_IMAGE_LOCATION = "https://authorize.payments.amazon.com/pba/images/MarketPlaceFeeWithLogo.png";

  SIGNATURE_KEYNAME = "signature"
  SIGNATURE_METHOD_KEYNAME = "signatureMethod"
  SIGNATURE_VERSION_KEYNAME = "signatureVersion"
  SIGNATURE_VERSION = "2"
  COBRANDING_STYLE = "logo"

  HMAC_SHA256_ALGORITHM = "HmacSHA256"
  HMAC_SHA1_ALGORITHM = "HmacSHA1"


   # Function creates a Map of key-value pairs for all valid values passed to the function
   # @param accessKey - Put your Access Key here
   # @param amount - Enter the amount you want to collect for the item
   # @param description - description - Enter a description of the item
   # @param referenceId - Optionally enter an ID that uniquely identifies this transaction for your records
   # @param abandonUrl - Optionally, enter the URL where senders should be redirected if they cancel their transaction
   # @param returnUrl - Optionally enter the URL where buyers should be redirected after they complete the transaction
   # @param immediateReturn - Optionally, enter "1" if you want to skip the final status page in Amazon Payments,
   # @param processImmediate - Optionally, enter "1" if you want to settle the transaction immediately else "0". Default value is "1"
   # @param ipnUrl - Optionally, type the URL of your host page to which Amazon Payments should send the IPN transaction information.
   # @param collectShippingAddress - Optionally, enter "1" if you want Amazon Payments to return the buyer's shipping address as part of the transaction information.
   # @param signatureMethod - Valid values are  HmacSHA256 and HmacSHA1
   # @param recipientEmail - Enter the e-mail address for the seller.
   # @param fixedMarketplaceFee - Optionally, enter the fixed market place fee
   # @param variableMarketplaceFee - Optionally, enter the variable market place fee

   # @return - A map of key of key-value pair for all non null parameters

  def self.get_marketplace_pay_button_params(access_key,amount, description, reference_id, immediate_return,
            return_url, abandon_url, process_immediate, ipn_url, collectShippingAddress,
            signatureMethod,recipientEmail, fixedMarketplaceFee,variableMarketplaceFee)
    form_hidden_inputs = {}
     if (access_key== nil) then
        raise ArgumentError, 'AccessKey is required parameter'
    else
    form_hidden_inputs["accessKey"] = access_key
    end
    if (amount == nil) then
        raise ArgumentError, 'Amount is required parameter'
    else
    form_hidden_inputs["amount"] = amount
    end
    if (description == nil) then
    raise ArgumentError, 'Description is required parameter'
    else
         form_hidden_inputs["description"] = description
    end
    if (signatureMethod == nil) then
        raise ArgumentError, 'Signature Method is required parameter'
    else
        form_hidden_inputs[SIGNATURE_METHOD_KEYNAME] = signatureMethod
    end
    if ( recipientEmail == nil) then
        raise ArgumentError, 'Recipient Email is required parameter'
    else
    	form_hidden_inputs["recipientEmail"] = recipientEmail
    end
    form_hidden_inputs["referenceId"] = reference_id unless reference_id.nil?
    form_hidden_inputs["immediateReturn"] = immediate_return unless immediate_return.nil?
    form_hidden_inputs["returnUrl"] = return_url unless return_url.nil?
    form_hidden_inputs["abandonUrl"] = abandon_url unless abandon_url.nil?
    form_hidden_inputs["processImmediate"] = process_immediate unless process_immediate.nil?
    form_hidden_inputs["ipnUrl"] = ipn_url unless ipn_url.nil?
    form_hidden_inputs["collectShippingAddress"] = collectShippingAddress unless collectShippingAddress.nil?

    form_hidden_inputs["fixedMarketplaceFee"] = fixedMarketplaceFee unless fixedMarketplaceFee.nil?
    form_hidden_inputs["variableMarketplaceFee"] = variableMarketplaceFee unless variableMarketplaceFee.nil?

    form_hidden_inputs["cobrandingStyle"] = COBRANDING_STYLE
    form_hidden_inputs[SIGNATURE_VERSION_KEYNAME] = SIGNATURE_VERSION

    return form_hidden_inputs
  end

  # Creates a form from the provided key-value pairs
  # @param form_hidden_inputs
  #            - A map of key of key-value pair for all non null parameters
  # @param service_end_point
  #            - The Endpoint to be used based on environment selected
  # @param image_location
  #            - The imagelocation based on environment
  # @return - An html form created using the key-value pairs


  def self.get_marketplace_pay_button_form(form_hidden_inputs,service_end_point,image_location)
    form = "<form action=\"" + service_end_point + "\" method=\"" + @@ASPhttp_method + "\">\n"
    form += "<input type=\"image\" src=\""+image_location+"\" border=\"0\">\n"
    form_hidden_inputs.each { |k,v|
        form += "<input type=\"hidden\" name=\"" + k + "\" value=\"" + v + "\" >\n"
    }
    form += "</form>\n"
  end


   # @param accessKey - Put your Access Key here
   # @param secretKey - Put your Secret Key here
   # @param amount - Enter the amount you want to collect for the item
   # @param description - description - Enter a description of the item
   # @param referenceId - Optionally enter an ID that uniquely identifies this transaction for your records
   # @param abandonUrl - Optionally, enter the URL where senders should be redirected if they cancel their transaction
   # @param returnUrl - Optionally enter the URL where buyers should be redirected after they complete the transaction
   # @param immediateReturn - Optionally, enter "1" if you want to skip the final status page in Amazon Payments,
   # @param processImmediate - Optionally, enter "1" if you want to settle the transaction immediately else "0". Default value is "1"
   # @param ipnUrl - Optionally, type the URL of your host page to which Amazon Payments should send the IPN transaction information.
   # @param collectShippingAddress - Optionally, enter "1" if you want Amazon Payments to return the buyer's shipping address as part of the transaction information.
   # @param signatureMethod - Valid values are  HmacSHA256 and HmacSHA1
   # @param recipientEmail - Enter the e-mail address for the seller.
   # @param fixedMarketplaceFee - Optionally, enter the fixed market place fee
   # @param variableMarketplaceFee - Optionally, enter the variable market place fee
   # @param environment - Valid values are "sandbox" or "prod"

  def self.generate_marketplace_pay_button_form(accessKey, secretKey, amount,  description,  referenceId, immediateReturn,returnUrl,  abandonUrl,  processImmediate, ipnUrl,collectShippingAddress, signatureMethod,recipientEmail, fixedMarketplaceFee,variableMarketplaceFee, environment)
    if (environment == "prod") then
	endPoint = @@PROD_END_POINT;
	imageLocation = @@PROD_IMAGE_LOCATION;
    else
	 endPoint = @@SANDBOX_END_POINT;
	 imageLocation = @@SANDBOX_IMAGE_LOCATION;
    end
    uri = URI.parse(endPoint)
    params = Amazon::FPS::ButtonGenerator.get_marketplace_pay_button_params(accessKey, amount,  description,  referenceId, immediateReturn,returnUrl,  abandonUrl,  processImmediate, ipnUrl,collectShippingAddress, signatureMethod,recipientEmail, fixedMarketplaceFee,variableMarketplaceFee)

    signature = Amazon::FPS::SignatureUtils.sign_parameters({:parameters => params,
                                            :aws_secret_key => secretKey,
                                            :host => uri.host,
                                            :verb => @@ASPhttp_method,
                                            :uri  => uri.path,
					    :algorithm => signatureMethod  })
    params[SIGNATURE_KEYNAME] = signature
    marketplace_pay_button_form = get_marketplace_pay_button_form(params,endPoint,imageLocation)
    print marketplace_pay_button_form
  end

   # Function creates a Map of key-value pairs for all valid values passed to the function
   # @param accessKey - Put your Access Key here
   # @param returnUrl - Enter the URL where recipient should be redirected after they accept the Marketplace Fee
   # @param signatureMethod - Valid values are  HmacSHA256 and HmacSHA1
   # @param callerReference -Optionally, enter an ID that uniquely identifies this transaction for callers Record
   # @param fixedMarketplaceFee - Optionally, enter the fixed market place fee
   # @param variableMarketplaceFee - Optionally, enter the variable market place fee
   # @return - A map of key of key-value pair for all non null parameters

  def self.get_accept_marketplace_fee_button_params(access_key,return_url,signatureMethod,callerReference, fixedMarketplaceFee,variableMarketplaceFee)
    form_hidden_inputs = {}
    if (access_key== nil) then
        raise ArgumentError, 'AccessKey is required parameter'
    else
    form_hidden_inputs["callerKey"] = access_key
    end
    if (signatureMethod == nil) then
        raise ArgumentError, 'Signature Method is required parameter'
    else
        form_hidden_inputs[SIGNATURE_METHOD_KEYNAME] = signatureMethod
    end
    if (return_url == nil) then
        raise ArgumentError, 'Return_url is required parameter'
    else
	form_hidden_inputs["returnUrl"] = return_url
    end

    form_hidden_inputs["pipelineName"] = "Recipient"
    form_hidden_inputs["recipientPaysFee"] = "True"
    form_hidden_inputs["collectEmailAddress"] = "True"

    if (callerReference == nil) then
    value=""; 8.times{value << ((rand(2)==1?65:97) + rand(25)).chr}
    callerReference = value
    end
    form_hidden_inputs["callerReference"] = callerReference
    form_hidden_inputs["maxFixedFee"] = fixedMarketplaceFee unless fixedMarketplaceFee.nil?
    form_hidden_inputs["maxvariableFee"] = variableMarketplaceFee unless variableMarketplaceFee.nil?

    form_hidden_inputs["cobrandingStyle"] = COBRANDING_STYLE
    form_hidden_inputs[SIGNATURE_VERSION_KEYNAME] = SIGNATURE_VERSION

    return form_hidden_inputs
  end

  # Creates a form from the provided key-value pairs
  # @param form_hidden_inputs
  #            - A map of key of key-value pair for all non null parameters
  # @param service_end_point
  #            - The Endpoint to be used based on environment selected
  # @param image_location
  #            - The imagelocation based on environment
  # @return - An html form created using the key-value pairs


  def self.get_accept_marketplace_fee_button_form(form_hidden_inputs,service_end_point,image_location,path)
    form = "<form action=\"https://" + service_end_point + path + "\" method=\"" + @@CBUIhttp_method + "\">\n"
    form += "<input type=\"image\" src=\""+image_location+"\" border=\"0\">\n"
    form_hidden_inputs.each { |k,v|
        form += "<input type=\"hidden\" name=\"" + k + "\" value=\"" + v + "\" >\n"
    }
    form += "</form>\n"
  end


   # @param accessKey - Put your Access Key here
   # @param secretKey - Put your Secret Key here
   # @param returnUrl - Enter the URL where recipient should be redirected after they accept the Marketplace Fee
   # @param callerReference -Optionally, enter an ID that uniquely identifies this transaction for callers Record
   # @param signatureMethod - Valid values are  HmacSHA256 and HmacSHA1
   # @param fixedMarketplaceFee - Optionally, enter the fixed market place fee
   # @param variableMarketplaceFee - Optionally, enter the variable market place fee
   # @param environment - Valid values are "sandbox" or "prod"

  def self.generate_accept_marketplace_fee_button_form(accessKey, secretKey,returnUrl,signatureMethod,callerReference, fixedMarketplaceFee,variableMarketplaceFee, environment)
    if (environment == "prod") then
	endPoint = @@PROD_END_POINT;
	imageLocation = @@PROD_MP_IMAGE_LOCATION;
    else
	 endPoint = @@SANDBOX_END_POINT;
	 imageLocation = @@SANDBOX_MP_IMAGE_LOCATION;
    end
    uri = URI.parse(endPoint)
    params = Amazon::FPS::ButtonGenerator.get_accept_marketplace_fee_button_params(accessKey,returnUrl,signatureMethod,callerReference, fixedMarketplaceFee,variableMarketplaceFee)

    signature = Amazon::FPS::SignatureUtils.sign_parameters({:parameters => params,
                                            :aws_secret_key => secretKey,
                                            :host => uri.host,
                                            :verb => @@CBUIhttp_method,
                                            :uri  => @@CBUI_REQUEST_URI,
					    :algorithm => signatureMethod })
    params[SIGNATURE_KEYNAME] = signature
    accept_marketplace_fee_button_form = get_accept_marketplace_fee_button_form(params,uri.host,imageLocation,@@CBUI_REQUEST_URI)
    print accept_marketplace_fee_button_form
  end

end

end
end

## NOTICE
Amazon FPS Ruby Library
Copyright 2008-2010 Amazon Technologies, Inc

This product includes software developed by
Amazon Technologies, Inc (http://www.amazon.com/).

## SignatureUtils.rb
################################################################################
#  Copyright 2008-2010 Amazon Technologies, Inc
#  Licensed under the Apache License, Version 2.0 (the "License");
#
#  You may not use this file except in compliance with the License.
#  You may obtain a copy of the License at: http://aws.amazon.com/apache2.0
#  This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
#  CONDITIONS OF ANY KIND, either express or implied. See the License for the
#  specific language governing permissions and limitations under the License.
################################################################################


require 'base64'
require 'cgi'
require 'openssl'

module Amazon
module FPS

#
# Copyright:: Copyright (c) 2009 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
#
# RFC 2104-compliant HMAC signature for request parameters
#  Implements AWS Signature, as per following spec:
#
# In Signature Version 2, string to sign is based on following:
#
#    1. The HTTP Request Method followed by an ASCII newline (%0A)
#    2. The HTTP Host header in the form of lowercase host, followed by an ASCII newline.
#    3. The URL encoded HTTP absolute path component of the URI
#       (up to but not including the query string parameters);
#       if this is empty use a forward '/'. This parameter is followed by an ASCII newline.
#    4. The concatenation of all query string components (names and values)
#       as UTF-8 characters which are URL encoded as per RFC 3986
#       (hex characters MUST be uppercase), sorted using lexicographic byte ordering.
#       Parameter names are separated from their values by the '=' character
#       (ASCII character 61), even if the value is empty.
#       Pairs of parameter and values are separated by the '&' character (ASCII code 38).
#
class SignatureUtils

  SIGNATURE_KEYNAME = "signature"

  HMAC_SHA256_ALGORITHM = "HmacSHA256"
  HMAC_SHA1_ALGORITHM = "HmacSHA1"

  def self.sign_parameters(args)
    string_to_sign = "";
    string_to_sign = calculate_string_to_sign_v2(args)
    return compute_signature(string_to_sign, args[:aws_secret_key],get_algorithm(args[:algorithm]))
  end

  # Convert a string into URL encoded form.
  def self.urlencode(plaintext)
    CGI.escape(plaintext.to_s).gsub("+", "%20").gsub("%7E", "~")
  end

  private # All the methods below are private

  def self.calculate_string_to_sign_v2(args)
    parameters = args[:parameters]

    uri = args[:uri]
    uri = "/" if uri.nil? or uri.empty?
    uri = urlencode(uri).gsub("%2F", "/")

    verb = args[:verb]
    host = args[:host].downcase


    # exclude any existing Signature parameter from the canonical string
    sorted = (parameters.reject { |k, v| k == SIGNATURE_KEYNAME }).sort

    canonical = "#{verb}\n#{host}\n#{uri}\n"
    isFirst = true

    sorted.each { |v|
      if(isFirst) then
        isFirst = false
      else
        canonical << '&'
      end

      canonical << urlencode(v[0])
      unless(v[1].nil?) then
        canonical << '='
        canonical << urlencode(v[1])
      end
    }

    return canonical
  end

  def self.get_algorithm(signature_method)
    return 'sha256' if (signature_method == HMAC_SHA256_ALGORITHM);
    return 'sha1'
  end

  def self.compute_signature(canonical, aws_secret_key, algorithm = 'sha1')
    digest = OpenSSL::Digest::Digest.new(algorithm)
    return Base64.encode64(OpenSSL::HMAC.digest(digest, aws_secret_key, canonical)).chomp
  end

end

end
end

	################################################################################
	# Copyright 2008-2010 Amazon Technologies, Inc
	# Licensed under the Apache License, Version 2.0 (the "License");
	#
	# You may not use this file except in compliance with the License.
	# You may obtain a copy of the License at: http://aws.amazon.com/apache2.0
	# This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
	# CONDITIONS OF ANY KIND, either express or implied. See the License for the
	# specific language governing permissions and limitations under the License.
	################################################################################



	require 'ButtonGenerator'

	module Amazon
	module FPS

	class MarketplacePayButtonSample

	@@accessKey = "<insert-access-key>"; #Put your Access Key here
	@@secretKey = "<insert-secret-key>"; #Put your Secret Key here
	@@amount="USD 1.1"; #Enter the amount you want to collect for the item
	@@signatureMethod="HmacSHA256"; #Valid values are HmacSHA256 and HmacSHA1.
	@@description="Test Widget"; #Enter a description of the item
	@@referenceId="test-reference123"; #Optionally, enter an ID that uniquely identifies this transaction for your records
	@@abandonUrl="http://yourwebsite.com/cancel.html"; #Optionally, enter the URL where senders should be redirected if they cancel their transaction
	@@returnUrl="http://yourwebsite.com/return.html"; #Optionally enter the URL where buyers should be redirected after they complete the transaction
	@@immediateReturn="0"; #Optionally, enter "1" if you want to skip the final status page in Amazon Payments
	@@processImmediate="1"; #Optionally, enter "1" if you want to settle the transaction immediately else "0". Default value is "1"
	@@ipnUrl="http://yourwebsite.com/ipn"; #Optionally, type the URL of your host page to which Amazon Payments should send the IPN transaction information.
	@@collectShippingAddress=nil; #Optionally, enter "1" if you want Amazon Payments to return the buyer's shipping address as part of the transaction information
	@@recipientEmail = "new_ngo@amazon.com"; #Enter the e-mail address for the seller
	@@fixedMarketplaceFee ="0.01"; #Optionally, enter the fixed market place fee
	@@variableMarketplaceFee = "4" ; #Optionally, enter the variable market place fee

	@@environment="sandbox"; #Valid values are "sandbox" or "prod"


	def self.sample_form()
	Amazon::FPS::ButtonGenerator.generate_marketplace_pay_button_form( @@accessKey, @@secretKey, @@amount, @@description, @@referenceId, @@immediateReturn,@@returnUrl, @@abandonUrl, @@processImmediate, @@ipnUrl,@@collectShippingAddress, @@signatureMethod,@@recipientEmail,@@fixedMarketplaceFee, @@variableMarketplaceFee, @@environment)
	rescue Exception => msg
	puts msg

	end


	end

	end
	end

	Amazon::FPS::MarketplacePayButtonSample.sample_form()
	Apache License
	Version 2.0, January 2004

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	Amazon FPS Ruby Library
	Copyright 2008-2010 Amazon Technologies, Inc

	This product includes software developed by
	Amazon Technologies, Inc (http://www.amazon.com/).