Authentication Method B
Authentication URL format
http://Hostname/timestamp/md5hash/Filenamehttps://Hostname/timestamp/md5hash/Filename
Parameter description
Field | Description |
Hostname | Site Acceleration Domain. |
Path | Resource access path, authentication requires prefixing with /. |
timestamp | UTC+8 Time, format: YYYYMMDDHHMM, e.g., 201807301000. |
md5hash | A fixed length string of 32 bits calculated using the MD5 algorithm: Algorithm: MD5(Key + timestamp + Path). Authentication Logic: If the request has not expired, the node compares this string value with the md5hash value carried in the request URL. If the values are the same, authentication passes, and the request is responded to; if the values are different, authentication fails, returning 403. |
Configuration Samples
Assume the request
https://www.example.com/foo.jpg uses Authentication Method B, configure as follows:
Get authentication parameters:
Path:
/foo.jpg.timestamp: The server-side generated authentication URL time is July 15, 2024, 15:33:50 (UTC+8), expressed in decimal (YYYYMMDDHHmm) format as
202407151533.Key:
DvYmqE81E1F9R791H6lmht.md5hash: MD5(Key + timestamp + Path) = MD5(
DvYmqE81E1F9R791H6lmht202407151533/foo.jpg) = d1f0b51c6894231fc12e054fcc7f0b3e. Authentication URL generated by the client request
https://www.example.com/202407151533/d1f0b51c6894231fc12e054fcc7f0b3e/foo.jpg.Node Authentication
When the Node Server receives a request from the client via the encrypted URL, it extracts the timestamp parameter from the URL, adds the configured Effective duration of "1 second", and compares it to the current time:
1. exceed the "timestamp + effective duration" time, the request is not expired, continue to step 2.
2. The Node Server calculates the md5hash value using the obtained authentication parameters and compares it with the md5hash value carried in the request URL. If the values are the same, authentication passes and the request is responded to; if the values are different, authentication fails, returning 403.
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