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| <?php | ||
| /** | ||
| * FoxyCart_Helper | ||
| * | ||
| * @author FoxyCart.com | ||
| * @copyright FoxyCart.com LLC, 2010 | ||
| * @version 0.7.0.20100716 | ||
| * @license http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public License | ||
| * @example http://wiki.foxycart.com/docs/cart/validation | ||
| * | ||
| * Requirements: | ||
| * - Form "code" values should not have leading or trailing whitespace. | ||
| * - Cannot use double-pipes in an input's name | ||
| * - Empty textareas are assumed to be "open" | ||
| */ | ||
| class FoxyCart_Helper { | ||
| /** | ||
| * API Key (Secret) | ||
| * | ||
| * @var string | ||
| **/ | ||
| private static $secret = 'ENTER YOUR KEY HERE'; | ||
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||
| /** | ||
| * Cart URL | ||
| * | ||
| * @var string | ||
| **/ | ||
| // protected static $cart_url = 'https://yourdomain.foxycart.tld/cart'; | ||
| protected static $cart_url = 'https://themancan.foxycart.com/dev/sandbox_brett/cart'; | ||
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| /** | ||
| * Cart Excludes | ||
| * | ||
| * Arrays of values and prefixes that should be ignored when signing links and forms. | ||
| * @var array | ||
| */ | ||
| protected static $cart_excludes = array( | ||
| // Cart values | ||
| 'cart', 'fcsid', 'empty', 'coupon', 'output', 'sub_token', 'redirect', 'callback', '_', | ||
| // Checkout pre-population values | ||
| 'customer_email', 'customer_first_name', 'customer_last_name', 'customer_address1', 'customer_address2', | ||
| 'customer_city', 'customer_state', 'customer_postal_code', 'customer_country', 'customer_phone', 'customer_company', | ||
| 'shipping_first_name', 'shipping_last_name', 'shipping_address1', 'shipping_address2', | ||
| 'shipping_city', 'shipping_state', 'shipping_postal_code', 'shipping_country', 'shipping_phone', 'shipping_company', | ||
| ); | ||
| protected static $cart_excludes_prefixes = array( | ||
| 'h:', 'x:', '__', | ||
| ); | ||
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||
| /** | ||
| * Debugging | ||
| * | ||
| * Set to $debug to TRUE to enable debug logging. This will BREAK the functionality, but will aid in debugging. | ||
| * | ||
| */ | ||
| protected static $debug = FALSE; | ||
| protected static $log = array(); | ||
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| /** | ||
| * "Link Method": Generate HMAC SHA256 for GET Query Strings | ||
| * | ||
| * Notes: Can't parse_str because PHP doesn't support non-alphanumeric characters as array keys. | ||
| * @return string | ||
| **/ | ||
| public static function fc_hash_querystring($qs, $output = TRUE) { | ||
| self::$log[] = '<strong>Signing link</strong> with data: '.htmlspecialchars(substr($qs, 0, 150)).'...'; | ||
| $fail = self::$cart_url.'?'.$qs; | ||
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||
| // If the link appears to be hashed already, don't bother | ||
| if (strpos($qs, '||')) { | ||
| self::$log[] = '<strong>Link appears to be signed already</strong>: '.htmlspecialchars($code[0]); | ||
| return $fail; | ||
| } | ||
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||
| // Stick an ampersand on the beginning of the querystring to make matching the first element a little easier | ||
| $qs = '&'.urldecode($qs); | ||
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||
| // Get all the prefixes, codes, and name=value pairs | ||
| preg_match_all('%(?P<amp>&(?:amp;)?)(?P<prefix>[a-z0-9]{1,3}:)?(?P<name>[^=]+)=(?P<value>[^&]+)%', $qs, $pairs, PREG_SET_ORDER); | ||
| self::$log[] = 'Found the following pairs to sign:<pre>'.htmlspecialchars(print_r($pairs, true)).'</pre>'; | ||
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| // Get all the "code" values, set the matches in $codes | ||
| $codes = array(); | ||
| foreach ($pairs as $pair) { | ||
| if ($pair['name'] == 'code') { | ||
| $codes[$pair['prefix']] = $pair['value']; | ||
| } | ||
| } | ||
| if ( ! count($codes)) { | ||
| self::$log[] = '<strong style="color:#600;">No code found</strong> for the above link.'; | ||
| return $fail; | ||
| } | ||
| self::$log[] = '<strong style="color:orange;">CODES found:</strong> '.htmlspecialchars(print_r($codes, true)); | ||
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||
| // Sign the name/value pairs | ||
| foreach ($pairs as $pair) { | ||
| // Skip the cart excludes | ||
| if (in_array($pair['name'], self::$cart_excludes) || in_array($pair['prefix'], self::$cart_excludes_prefixes)) { | ||
| self::$log[] = '<strong style="color:purple;">Skipping</strong> the reserved parameter or prefix "'.$pair['prefix'].$pair['name'].'" = '.$pair['value']; | ||
| continue; | ||
| } | ||
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||
| // Continue to sign the value and replace the name=value in the querystring with name=value||hash | ||
| $value = self::fc_hash_value($codes[$pair['prefix']], $pair['name'], $pair['value'], 'value', FALSE, 'urlencode'); | ||
| $replacement = $pair['amp'].$pair['prefix'].urlencode($pair['name']).'='.$value; | ||
| $qs = str_replace($pair[0], $replacement, $qs); | ||
| self::$log[] = 'Signed <strong>'.$pair['name'].'</strong> = <strong>'.$pair['value'].'</strong> with '.$replacement.'.<br />Replacing: '.$pair[0].'<br />With... '.$replacement; | ||
| } | ||
| $qs = ltrim($qs, '&'); // Get rid of that leading ampersand we added earlier | ||
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||
| if ($output) { | ||
| echo self::$cart_url.'?'.$qs; | ||
| } else { | ||
| return self::$cart_url.'?'.$qs; | ||
| } | ||
| } | ||
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| /** | ||
| * "Form Method": Generate HMAC SHA256 for form elements or individual <input />s | ||
| * | ||
| * @return string | ||
| **/ | ||
| public static function fc_hash_value($product_code, $option_name, $option_value = '', $method = 'name', $output = TRUE, $urlencode = false) { | ||
| if (!$product_code || !$option_name) { | ||
| return FALSE; | ||
| } | ||
| if ($option_value == '--OPEN--') { | ||
| $hash = hash_hmac('sha256', $product_code.$option_name.$option_value, self::$secret); | ||
| $value = ($urlencode) ? urlencode($option_name).'||'.$hash.'||open' : $option_name.'||'.$hash.'||open'; | ||
| } else { | ||
| $hash = hash_hmac('sha256', $product_code.$option_name.$option_value, self::$secret); | ||
| if ($method == 'name') { | ||
| $value = ($urlencode) ? urlencode($option_name).'||'.$hash : $option_name.'||'.$hash; | ||
| } else { | ||
| $value = ($urlencode) ? urlencode($option_value).'||'.$hash : $option_value.'||'.$hash; | ||
| } | ||
| } | ||
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| if ($output) { | ||
| echo $value; | ||
| } else { | ||
| return $value; | ||
| } | ||
| } | ||
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| /** | ||
| * Raw HTML Signing: Sign all links and form elements in a block of HTML | ||
| * | ||
| * Accepts a string of HTML and signs all links and forms. | ||
| * Requires link 'href' and form 'action' attributes to use 'https' and not 'http'. | ||
| * Requires a 'code' to be set in every form. | ||
| * | ||
| * @return string | ||
| **/ | ||
| public static function fc_hash_html($html) { | ||
| // Initialize some counting | ||
| $count['temp'] = 0; // temp counter | ||
| $count['links'] = 0; | ||
| $count['forms'] = 0; | ||
| $count['inputs'] = 0; | ||
| $count['lists'] = 0; | ||
| $count['textareas'] = 0; | ||
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| // Find and sign all the links | ||
| preg_match_all('%<a .*?href=[\'"]'.preg_quote(self::$cart_url).'(?:\.php)?\?(.+?)[\'"].*?>%i', $html, $querystrings); | ||
| // print_r($querystrings); | ||
| foreach ($querystrings[1] as $querystring) { | ||
| // If it's already signed, skip it. | ||
| if (preg_match('%&(?:amp;)?hash=%i', $querystring)) { | ||
| continue; | ||
| } | ||
| $pattern = '%(href=[\'"])'.preg_quote(self::$cart_url, '%').'(?:\.php)?\?'.preg_quote($querystring, '%').'([\'"])%i'; | ||
| $signed = self::fc_hash_querystring($querystring, FALSE); | ||
| $html = preg_replace($pattern, '$1'.$signed.'$2', $html, -1, $count['temp']); | ||
| $count['links'] += $count['temp']; | ||
| } | ||
| unset($querystrings); | ||
|
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| // Find and sign all form values | ||
| preg_match_all('%<form [^>]*?action=[\'"]'.preg_quote(self::$cart_url).'(?:\.php)?[\'"].*?>(.+?)</form>%is', $html, $forms); | ||
| foreach ($forms[1] as $form) { | ||
| $count['forms']++; | ||
| self::$log[] = '<strong>Signing form</strong> with data: '.htmlspecialchars(substr($form, 0, 150)).'...'; | ||
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| // Store the original form so we can replace it when we're done | ||
| $form_original = $form; | ||
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| // Check for the "code" input, set the matches in $codes | ||
| if (!preg_match_all('%<[^>]*?name=([\'"])([0-9]{1,3}:)?code\1[^>]*?>%i', $form, $codes, PREG_SET_ORDER)) { | ||
| self::$log[] = '<strong style="color:#600;">No code found</strong> for the above form.'; | ||
| continue; | ||
| } | ||
| // For each code found, sign the appropriate inputs | ||
| foreach ($codes as $code) { | ||
| // If the form appears to be hashed already, don't bother | ||
| if (strpos($code[0], '||')) { | ||
| self::$log[] = '<strong>Form appears to be signed already</strong>: '.htmlspecialchars($code[0]); | ||
| continue; | ||
| } | ||
| // Get the code and the prefix | ||
| $prefix = (isset($code[2])) ? $code[2] : ''; | ||
| preg_match('%<[^>]*?value=([\'"])(.+?)\1[^>]*?>%i', $code[0], $code); | ||
| $code = trim($code[2]); | ||
| self::$log[] = '<strong>Prefix for '.htmlspecialchars($code).'</strong>: '.htmlspecialchars($prefix); | ||
| if (!$code) { // If the code is empty, skip this form or specific prefixed elements | ||
| continue; | ||
| } | ||
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||
| // Sign all <input /> elements with matching prefix | ||
| preg_match_all('%<input [^>]*?name=([\'"])'.preg_quote($prefix).'(?![0-9]{1,3})(?:.+?)\1[^>]*>%i', $form, $inputs); | ||
| foreach ($inputs[0] as $input) { | ||
| $count['inputs']++; | ||
| // Test to make sure both name and value attributes are found | ||
| if ((preg_match('%name=([\'"])'.preg_quote($prefix).'(?![0-9]{1,3})(.+?)\1%i', $input, $name) > 0) && (preg_match('%value=([\'"])(.+?)\1%i', $input, $value) > 0)) { | ||
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| self::$log[] = '<strong>INPUT:</strong> Code: <strong>'.$prefix.htmlspecialchars(preg_quote($name[2])).'</strong>'; | ||
| self::$log[] = '<strong>Replacement Pattern:</strong> ([\'"])'.$prefix.preg_quote($name[2]).'\1'; | ||
| $input_signed = preg_replace('%([\'"])'.$prefix.preg_quote($name[2]).'\1%', '${1}'.$prefix.self::fc_hash_value($code, $name[2], $value[2], 'name', FALSE)."$1", $input); | ||
| self::$log[] = '<strong>INPUT:</strong> Code: <strong>'.htmlspecialchars($prefix.$code). | ||
| '</strong> :: Name: <strong>'.htmlspecialchars($prefix.$name[2]). | ||
| '</strong> :: Value: <strong>'.htmlspecialchars($value[2]). | ||
| '</strong><br />Initial input: '.htmlspecialchars($input). | ||
| '<br />Signed: <span style="color:#060;">'.htmlspecialchars($input_signed).'</span>'; | ||
| $form = str_replace($input, $input_signed, $form); | ||
| } | ||
| } | ||
| self::$log[] = '<strong>FORM after INPUTS:</strong> <pre>'.htmlspecialchars($form).'</pre>'; | ||
|
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| // Sign all <option /> elements | ||
| preg_match_all('%<select [^>]*name=([\'"])'.preg_quote($prefix).'(?![0-9]{1,3})(.+?)\1[^>]*>(.+?)</select>%is', $form, $lists, PREG_SET_ORDER); | ||
| // echo "\n\nSelects: ".print_r($lists, true); | ||
| foreach ($lists as $list) { | ||
| $count['lists']++; | ||
| preg_match_all('%<option [^>]*value=([\'"])(.+?)\1[^>]*>(?:.*?)</option>%i', $list[0], $options, PREG_SET_ORDER); | ||
| // echo "\n\nOptions: ".print_r($options, true); | ||
| foreach ($options as $option) { | ||
| $option_signed = preg_replace('%([\'"])'.preg_quote($option[2]).'\1%', "$1".self::fc_hash_value($code, $list[2], $option[2], 'value', FALSE)."$1", $option[0]); | ||
| $form = str_replace($option[0], $option_signed, $form); | ||
| self::$log[] = '<strong>OPTION:</strong> Code: <strong>'.htmlspecialchars($prefix.$code). | ||
| '</strong> :: Name: <strong>'.htmlspecialchars($prefix.$list[2]). | ||
| '</strong> :: Value: <strong>'.htmlspecialchars($option[2]). | ||
| '</strong><br />Initial option: '.htmlspecialchars($option[0]). | ||
| '<br />Signed: <span style="color:#060;">'.htmlspecialchars($option_signed).'</span>'; | ||
| } | ||
| } | ||
| self::$log[] = '<strong>FORM after OPTIONS:</strong> <pre>'.htmlspecialchars($form).'</pre>'; | ||
|
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| // Sign all <textarea /> elements | ||
| preg_match_all('%<textarea [^>]*name=([\'"])'.preg_quote($prefix).'(?![0-9]{1,3})(.+?)\1[^>]*>(.*?)</textarea>%is', $form, $textareas, PREG_SET_ORDER); | ||
| // echo "\n\nTextareas: ".print_r($textareas, true); | ||
| foreach ($textareas as $textarea) { | ||
| $count['textareas']++; | ||
| // Tackle implied "--OPEN--" first, if textarea is empty | ||
| $textarea[3] = ($textarea[3] == '') ? '--OPEN--' : $textarea[3]; | ||
| $textarea_signed = preg_replace('%([\'"])'.preg_quote($prefix.$textarea[2]).'\1%', "$1".self::fc_hash_value($code, $textarea[2], $textarea[3], 'name', FALSE)."$1", $textarea[0]); | ||
| $form = str_replace($textarea[0], $textarea_signed, $form); | ||
| self::$log[] = '<strong>TEXTAREA:</strong> Code: <strong>'.htmlspecialchars($prefix.$code). | ||
| '</strong> :: Name: <strong>'.htmlspecialchars($prefix.$textarea[2]). | ||
| '</strong> :: Value: <strong>'.htmlspecialchars($textarea[3]). | ||
| '</strong><br />Initial textarea: '.htmlspecialchars($textarea[0]). | ||
| '<br />Signed: <span style="color:#060;">'.htmlspecialchars($textarea_signed).'</span>'; | ||
| } | ||
| self::$log[] = '<strong>FORM after TEXTAREAS:</strong> <pre>'.htmlspecialchars($form).'</pre>'; | ||
|
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| // Exclude all <button> elements | ||
| $form = preg_replace('%<button ([^>]*)name=([\'"])(.*?)\1([^>]*>.*?</button>)%i', "<button $1name=$2x:$3$4", $form); | ||
|
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||
| } | ||
| // Replace the entire form | ||
| self::$log[] = '<strong>FORM after ALL:</strong> <pre>'.htmlspecialchars($form).'</pre>'.'replacing <pre>'.htmlspecialchars($form_original).'</pre>'; | ||
| $html = str_replace($form_original, $form, $html); | ||
| self::$log[] = '<strong>FORM end</strong><hr />'; | ||
| } | ||
|
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| // Return the signed output | ||
| $output = ''; | ||
| if (self::$debug) { | ||
| self::$log['Summary'] = $count['links'].' links signed. '.$count['forms'].' forms signed. '.$count['inputs'].' inputs signed. '.$count['lists'].' lists signed. '.$count['textareas'].' textareas signed.'; | ||
| $output .= '<h3>FoxyCart HMAC Debugging:</h3><ul>'; | ||
| foreach (self::$log as $name => $value) { | ||
| $output .= '<li><strong>'.$name.':</strong> '.$value.'</li>'; | ||
| } | ||
| $output .= '</ul><hr />'; | ||
| } | ||
| return $output.$html; | ||
| } | ||
|
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||
| } |