Questions about trojan protocol design (关于trojan协议设计的问题)

[ttc0419]

According to trojan official document, the protocol is defined as following:

+-----------------------+---------+----------------+---------+----------+
| hex(SHA224(password)) |  CRLF   | Trojan Request |  CRLF   | Payload  |
+-----------------------+---------+----------------+---------+----------+
|          56           | X'0D0A' |    Variable    | X'0D0A' | Variable |
+-----------------------+---------+----------------+---------+----------+

1. Why do we convert the binary output of sha224 to hex string?
2. hex(SHA224(password)) length is fixed, Trojan Request length can also be calculated esaily, why do we need to add CRLF at the end of each section?

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根据trojan官方文档，协议定义如下：

+-----------------------+---------+----------------+---------+----------+
| hex(SHA224(password)) |  CRLF   | Trojan Request |  CRLF   | Payload  |
+-----------------------+---------+----------------+---------+----------+
|          56           | X'0D0A' |    Variable    | X'0D0A' | Variable |
+-----------------------+---------+----------------+---------+----------+

1. 为什么要把sha224的二进制输出转换为文本十六进制？
2. hex(SHA224(password))为固定长度，Trojan Request也可以轻松计算长度，为什么需要CRLF把不同部分间隔？