StackOverflow2013

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plurals

PO
primarykey
Id
13914233
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
5
CommunityOwnedDate
CreationDate
2012-12-17T12:30:50.380
FavoriteCount
0
LastActivityDate
2012-12-17T20:08:38.140
LastEditDate
2012-12-17T20:08:38.140
LastEditorUserId
1143495
OwnerUserId
1143495
ParentId
13902082
PostTypeId
2
Score
2
ViewCount
0
LastEditorDisplayName
text
Body
You were using <code>openssl_pkey_export</code> wrong and you haven't removed <pre><code>-----BEGIN PUBLIC KEY----- ... -----END PUBLIC KEY----- </code></pre> from public key string before decoding it. I figured this out by looking at length of public key and signature. First one should be 161 and second one should be 128 bytes long (<a href="http://developer.chrome.com/extensions/crx.html#example" rel="nofollow">source</a>): <pre><code>A2 00 00 00 # 162 -- length of public key in bytes 80 00 00 00 # 128 -- length of signature in bytes </code></pre> Here is the fixed code (PHP 5.4): <pre><code>$pk=file_get_contents('pk.pem'); $priv = openssl_pkey_get_private($pk); $pub = openssl_pkey_get_details($priv)['key']; # make a SHA1 signature using our private key openssl_sign(file_get_contents('download.zip'), $signature, $priv, OPENSSL_ALGO_SHA1); # geting rid of -----BEGIN/END PUBLIC KEY----- # you can probably do it better using preg_match_all / explode(PHP_EOL, $pub) etc. $pub = trim(explode('-----',$pub)[2]); # decode the public key $pub = base64_decode($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($pub))); // public key length fwrite($fh, pack('V', strlen($signature))); // signature length fwrite($fh, $pub); // public key fwrite($fh, $signature); // signature fwrite($fh, file_get_contents('download.zip')); // package contents, zipped fclose($fh); </code></pre>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POGenerate Chrome .crx from PHP
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USKonrad Dzwinel
UserOwnerUserId
1. USKonrad Dzwinel
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. POGenerate Chrome .crx from PHP
 singulars
 PostTypePostTypeId
 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTAcceptedByOriginator
2. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId

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