Signature parameter no longer send

[marekgach]

My code was working properly and somehow Shopify stopped to send signature parameter. This will lead to:

Notice: Undefined index: signature in **/vendor/phpish/shopify/shopify.php on line 21

in function is_valid_request while validating request. As stated here https://help.shopify.com/api/guides/authentication/oauth#verification says: The signature attribute is deprecated due to vulnerabilities in how the signature is generated.

So it is possible they removed it in previous days from Shopify? Any suggestions?

[archimedesign]

Not sure if that's related but I couldn't access one of my shops on 26th
May and here's the reply from their support, maybe they were changing
something at the time:
"We experienced a brief outage earlier in the day, however the team has
resolved the issue."
On 2 Jun 2016 16:37, "Marek Gach" [email protected] wrote:

My code was working properly and somehow Shopify stopped to send signature
parameter. This will lead to:

Notice: Undefined index: signature in **/vendor/phpish/shopify/shopify.php
on line 21

in function is_valid_request while validating request. As stated here
https://help.shopify.com/api/guides/authentication/oauth#verification
says: The signature attribute is deprecated due to vulnerabilities in how
the signature is generated.

So it is possible they removed it in previous days from Shopify? Any
suggestions?

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[marekgach]

MD5 signature is no longer supported since 1st June. So it may be fixed like this: https://github.com/hsleewis/shopify/commit/fced4542010fcc566472fc6fefb36e195872fd49

However even this solution is not working for me when I verify the request for plugin preferences page. Because this request has some different parameters and SHA hash does not match at all.

[hellozach]

@marekgach - wrap the http_build_query() in urldecode()

See here: #4 (comment)

[ajrana000]

Please check this : #6

It will solve this issue.

[LukeTowers]

@marekgach @archimedesign @hellozach @ajrana000 feel free to give my version a try: https://github.com/LukeTowers/php-shopify-api