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POPHP server side IAB verification openssl_verify always returns 0
 

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  1. POPHP server side IAB verification openssl_verify always returns 0
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    <p>I'm using the following function (server side php) to verify a IAB v3 transaction:</p> <p>I'm passing from the android app:</p> <pre><code>@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { String signed_data=data.getStringExtra(IabHelper.RESPONSE_INAPP_PURCHASE_DATA); String signature=data.getStringExtra(IabHelper.RESPONSE_INAPP_SIGNATURE); </code></pre> <p>I have a feeling it may have something to do with the signature I'm passing. I'm using the following Android method to encode it, because without encoding I get an error:</p> <pre><code>public String URLsafe(String text){ try { return URLEncoder.encode(text, "utf-8"); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace();; } return null; } </code></pre> <p>I'm passing the url </p> <pre><code>http://www.example.com/handlepayment.php?signature=....&amp;data=.... public String getXmlFromUrl(String url) { String xml = null; try { // defaultHttpClient DefaultHttpClient httpClient = new MyHttpClient_ALKS(myContext.getApplicationContext()); HttpPost httpPost = new HttpPost(url); HttpResponse httpResponse = httpClient.execute(httpPost); HttpEntity httpEntity = httpResponse.getEntity(); xml = EntityUtils.toString(httpEntity); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return xml; } </code></pre> <p>to the server:</p> <pre><code>function verify_play($signed_data, $signature) { global $public_key_base64; $pkey = "-----BEGIN PUBLIC KEY-----\n". chunk_split($public_key_base64, 64,"\n"). '-----END PUBLIC KEY-----'; //using PHP to create an RSA key $pkey = openssl_get_publickey($pkey); //$signature should be in binary format, but it comes as BASE64. //So, I'll convert it. $signature = base64_decode($signature); //using PHP's native support to verify the signature $result = openssl_verify( $signed_data, $signature, $pkey, OPENSSL_ALGO_SHA1); if (0 === $result) { return false; } else if (1 !== $result) { return false; } else { return true; } } ; </code></pre> <p>It always seem to return false ($result=0), anybody any idea why? How can I pass the signature un-encoded, or which encoding should I use?</p>
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