为什么我的Azure SAS令牌签名不匹配? [英] Why isn't my Azure SAS Token Signature matching?

问题描述

这是我尝试访问存储中的Blob时返回的错误:

This is the error returned when I try to access a blob in storage:

代码:AuthenticationFailed消息:服务器无法验证请求.请确保正确构成Authorization标头的值，包括签名.AuthenticationErrorDetail:签名不匹配.用于签名的字符串是xxstorageaccount rwdlac b sco 2017-08-17T21:29:24Z 2017-08-17T21:34:24Z https 2017-04-17

Code: AuthenticationFailed Message: Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature. AuthenticationErrorDetail: Signature did not match. String to sign used was xxstorageaccount rwdlac b sco 2017-08-17T21:29:24Z 2017-08-17T21:34:24Z https 2017-04-17

这是我的代码:

$storageAccount = config('azure.storage.account');

$start = new \DateTime();     
$end = (new \DateTime())->modify('+5 minutes');
$start = $start->format('Y-m-d\TH:i:s\Z');
$end = $end->format('Y-m-d\TH:i:s\Z');

$toSign = $storageAccount . "\n";
$toSign .= "rwdlac" . "\n";
$toSign .= "b" . "\n";
$toSign .= "sco" . "\n";
$toSign .= $start . "\n";
$toSign .= $end . "\n"; 
$toSign .= "\n";
$toSign .= "https" . "\n";
$toSign .= "2017-04-17" . "\n";

$signature = rawurlencode(base64_encode(hash_hmac('sha256', $toSign, $sasKeyValue, TRUE))); 
$token = "?sv=2017-04-17&ss=b&srt=sco&sp=rwdlac&se=" . $end . "&st=" . $start . "&spr=https&sig=" . $signature;

return $uri . $token;

推荐答案

您可以做两件事来避免此错误.

You could do 2 things to avoid this error.

1. 通过 setTimezone()函数将开始和结束时间转换为GMT时间，或考虑使用

1. Convert start and end time to GMT time via setTimezone() function or consider using the gmdate function instead.

通过 base64_decode()函数解码base64帐户密钥.

Decode base64 account key through base64_decode() function.

请按以下方式更改您的代码:

Please change your code like the following:

$storageAccount = config('azure.storage.account');

$start = (new \DateTime())->setTimezone(new DateTimeZone('GMT'));     
$end = (new \DateTime())->setTimezone(new DateTimeZone('GMT'))->modify('+5 minutes');
$start = $start->format('Y-m-d\TH:i:s\Z');
$end = $end->format('Y-m-d\TH:i:s\Z');

$toSign = $storageAccount . "\n";
$toSign .= "rwdlac" . "\n";
$toSign .= "b" . "\n";
$toSign .= "sco" . "\n";
$toSign .= $start . "\n";
$toSign .= $end . "\n"; 
$toSign .= "\n";
$toSign .= "https" . "\n";
$toSign .= "2017-04-17" . "\n";

$signature = rawurlencode(base64_encode(hash_hmac('sha256', $toSign, base64_decode($sasKeyValue), TRUE))); 
$token = "?sv=2017-04-17&ss=b&srt=sco&sp=rwdlac&se=" . $end . "&st=" . $start . "&spr=https&sig=" . $signature;

return $uri . $token;

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