发出亚马逊灵活付款请求时出现无效签名错误
我正在使用 PHP 在 Amazon 中按照这些说明进行工作：http://docs.amazonwebservices。 com/AmazonFPS/latest/FPSBasicGuide/APPNDX_GenerateaSignature.html
这是我如何进行签名：
$string_to_sign = "GET\nauthorize.payments-sandbox.amazon.com\n/cobranded-ui/actions/start\n
SignatureMethod=HmacSHA256&SignatureVersion=2&callerKey='.$my_access_key_id.'&callerReference='.$caller_reference.'&paymentReason='.$payment_reason.'&pipelineName=SingleUse&returnUrl='.$return_url.'&transactionAmount=1.1";
$encoded_string_to_sign = URLEncode(Base64_Encode(hash_hmac("sha256", $string_to_sign, "1")));
但我不确定为什么签名编码不正确。需要注意的一件事是 hash_hmac("sha256", $string_to_sign, "1") 我在其中随机放置了“1”，因为亚马逊没有给出要在其中放置其他内容的说明。我如何知道亚马逊需要我在该功能中放置哪个键？我在他们的说明中没有注意到这一点。但也许我做错了什么？
I am working from these instructions in Amazon with PHP: http://docs.amazonwebservices.com/AmazonFPS/latest/FPSBasicGuide/APPNDX_GeneratingaSignature.html
and here is how I make my signature:
$string_to_sign = "GET\nauthorize.payments-sandbox.amazon.com\n/cobranded-ui/actions/start\n
SignatureMethod=HmacSHA256&SignatureVersion=2&callerKey='.$my_access_key_id.'&callerReference='.$caller_reference.'&paymentReason='.$payment_reason.'&pipelineName=SingleUse&returnUrl='.$return_url.'&transactionAmount=1.1";
$encoded_string_to_sign = URLEncode(Base64_Encode(hash_hmac("sha256", $string_to_sign, "1")));
But I am not sure why the signature isn't encoded correctly. One thing to look at is the hash_hmac("sha256", $string_to_sign, "1") where I randomly put the "1" because Amazon didn't give instructions for what other thing to put in there. How do I know which key in that function Amazon needs me to place? I didn't notice it in their instructions. But maybe it is something else I am doing wrong?
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$key参数使用的值是由亚马逊向您颁发的密钥。正如我在对上一个问题的回答中所解释的，您确实应该查看FPS PHP 库。
The value to use for the
$keyparameter is your Secret Key that you were issued by Amazon.As I explained in the answer to your last question, you really should have a look at the code included in the FPS PHP library.