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<cfscript>
    /*
        IMPORTANT: Make sure fileGetMimeType("c:/path/article.json") returns the
        correct mime type in your environment:
        
        ie:  Should return: "application/json"
             ...  and not :  "text/plain"
    */

    // Modify these variables for your environment

Leigh-

<!---
    CFML translation of Amazon Web Services Example - Task 4:
    http://docs.aws.amazon.com/general/latest/gr/sigv4-add-signature-to-request.html

    Note: Translation only includes generating Authorization header
--->
<h1>Task 4: Add the Signing Information to the Request</h1>

<div> 
    After you calculate the signature, you add it to the request. You can add the signing information to a request in one of two ways:

Leigh-

<!---
    CFML translation of Amazon Web Services Example - Task 3:
    http://docs.aws.amazon.com/general/latest/gr/sigv4-calculate-signature.html
--->
<h1>Task 3: Calculate the AWS Signature Version 4</h1>

<div> 
    <strong>Pseudocode for deriving a signing key</strong>
    <pre>
        kSecret = Your AWS Secret Access Key

Leigh-

<!---
    CFML translation of Amazon Web Services Example - Task 2:
    http://docs.aws.amazon.com/general/latest/gr/sigv4-create-string-to-sign.html
--->

<h1>Task 2: Create a String to Sign for Signature Version 4</h1>
<div> 
    <strong>Structure of string to sign</strong>
    <pre>StringToSign  = Algorithm + '\n' +
            RequestDate + '\n' +

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<!---
	CFML translation of Amazon Web Services Example - Task 1:
	http://docs.aws.amazon.com/general/latest/gr/sigv4-create-canonical-request.html
--->
<h1>Task 1: Create a Canonical Request for Signature Version 4 (ColdFusion)</h1>
<div> 
	<strong>Canonical request pseudocode</strong>
	<pre>CanonicalRequest = HTTPRequestMethod + '\n' +
			CanonicalURI + '\n' +
			CanonicalQueryString + '\n' +

Leigh-

<cfscript>
	/**
	* URI encoding per RFC 3986, which has treats the following as unreserved: ALPHA / DIGIT / "-" / "." / "_" / "~"
	* @text Text to encode
	* @returns URI encoded text
	*/
	public function encodeRFC3986(required string text) {
		// Requires CF10+
		Local.encoded = encodeForURL(arguments.text);
		// Reverse encoding of tilde "~"

Leigh-

/**
 * Amazon Web Services Signature 4 Utility for ColdFusion 
 * Version Date: 2016-04-12 (Alpha)
 *
 * Copyright 2016 Leigh (cfsearching)
 *
 * Requirements: Adobe ColdFusion 10+ 
 * AWS Signature 4 specifications: http://docs.aws.amazon.com/general/latest/gr/signature-version-4.html
 *
 * Licensed under the Apache License, Version 2.0 (the "License");

Leigh-

/**
 * Amazon S3 REST Wrapper
 * Version Date: 2016-04-12 
 * 
 * Copyright 2015 CF Webtools | cfwebtools.com
 *
 * 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
 *

Leigh-

/*
   Encrypt in ColdFusion

   Summary
   1. Generate a cryptographically random key with GenerateSecretKey(). Do *not* use a self generated 
      password, which is less secure. 
   2. Generate a random IV (initialization vector)][2] and decode into binary.
   3. Encrypt the plain text with AES/CBC/PKCS5Padding
*/