On Friday, March 23, 2018 at 9:11:00 AM UTC-4, Миша Винник wrote:
>
> Hello third time.
>
> Totally newbie in C++ and crypto-things.
> General schema is here: 
> https://developers.google.com/pay/api/payment-data-cryptography#encrypt-spec 
>

The Google Pay example is this:

{
  "protocolVersion": "ECv1",
  "signature": "TJVA95OrM7E2cBab30RMHrHDcEfxjoYZgeFONFh7HgQ",
  "signedMessage": "{\"encryptedMessage\":
                     \"ZW5jcnlwdGVkTWVzc2FnZQ==\",
                     \"ephemeralPublicKey\": \"ZXBoZW1lcmFsUHVibGljS2V5\",
                     \"tag\": \"c2lnbmF0dXJl\"}"
}

The workflow say Step 1 is:

    1. Fetch the Google signing keys

Do you know where the signing key is located? I cannot find a URL for it; 
and I cannot find a Hex or Base64 dump of it. Searching is producing a lot 
of irrelevant noise. (Maybe I missed it in my initial read of the page).

Jeff

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