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POCRX_ZREO_SIGNTURE_LENGTH failure in .crx file
 

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    <p>I have found this post <a href="https://stackoverflow.com/questions/5013263/create-google-chrome-crx-file-with-php">Create Google Chrome Crx file with PHP</a> to create a .crx file vith my ZIP archive. but when I try to run it I got a length of $signtrue = 0 and I didn't figure out why...my .pem file in found and valid, as well my .pub key file but it still return to me a zero length in the signture...</p> <pre><code>$fp = fopen("/public_html/apps/chrome/nsii.pem", "r"); $priv_key = fread($fp, filesize($fp)); fclose($fp); $pkeyid = openssl_get_privatekey($priv_key); openssl_sign(file_get_contents("$name.zip"), $signature, $pkeyid, 'sha1'); openssl_free_key($pk); # decode the public key $key = base64_decode(file_get_contents('extension_public_key.pub')); $fh = fopen("$name.crx", 'wb'); fwrite($fh, 'Cr24'); // extension file magic number fwrite($fh, pack('V', 2)); // crx format version fwrite($fh, pack('V', strlen($key))); // public key length fwrite($fh, pack('V', strlen($signature))); // signature length fwrite($fh, $key); // public key fwrite($fh, $signature); // signature fwrite($fh, file_get_contents("$name.zip")); // package contents, zipped fclose($fh); </code></pre> <p><strong>UPDATE:</strong></p> <p>The orignial code is as following:</p> <pre><code>&lt;?php # make a SHA1 signature using our private key $pk = openssl_pkey_get_private(file_get_contents('/public_html/apps/chrome/nsii.pem')); openssl_sign(file_get_contents('/public_html/apps/chrome/extGoogle.zip'), $signature, $pk, 'sha1'); openssl_free_key($pk); # decode the public key $key = base64_decode(file_get_contents('/public_html/apps/chrome/extension_public_key.pub')); # .crx package format: # # magic number char(4) # crx format ver byte(4) # pub key lenth byte(4) # signature length byte(4) # public key string # signature string # package contents, zipped string # # see http://code.google.com/chrome/extensions/crx.html # $fh = fopen('extension.crx', 'wb'); fwrite($fh, 'Cr24'); // extension file magic number fwrite($fh, pack('V', 2)); // crx format version fwrite($fh, pack('V', strlen($key))); // public key length fwrite($fh, pack('V', strlen($signature))); // signature length fwrite($fh, $key); // public key fwrite($fh, $signature); // signature fwrite($fh, file_get_contents('/public_html/apps/chrome/extGoogle.zip')); // package contents, zipped fclose($fh); </code></pre> <p>Seems is not work as well...the question is why?... All works fine if I using CLI to compile it...</p>
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    1. USMaor Tal
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    1. COPlease see the wording in your question and make yourself comfortable with the editing tools. Your code looks akward, please properly indent it as others need to read it. Also your call for help with a smiley is sometimes considered rude, because you just throw in some code and a "does not work". That's normally not enough to get some help here.
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    2. COThanks, I have update my post...my first time that I ask for help in those subjects..btw, this happen just in case I try to make a .crx from a archive .zip file, I have attached the original link with the original code..
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      1. USMaor Tal
    3. COThe original code is not very failsafe. I added an answer that should give you some pointers how you can add additional checks to make it more robust.
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