Question

在SSL 3.0握手服务器响应期间使用以下serverhello消息

16 03 00 00 51 02 00
00 4d 03 00 4f a1 c1
eb e3 fb 00 a9 c8 25
25 48 6f 89 27 ec bb
80 f3 8c 5d db f7 6c
94 56 d8 34 7a b5 9d
02 20 54 ab 20 ea 05
a6 38 6f ee 55 40 ae
af e2 5d ae 2a 4d c1
c6 f4 09 a7 08 b1 c5
49 39 87 82 d3 f7 00
39 00 00 05 ff 01 00
01 00

我理解这个回应如下：

Content-type: 22 (Handshake protocol)
Version: 3.0
Length: a1 (81 bytes)

Content-type: 02 (ServerHello)
Length: 4d (77 bytes)
Version: 3.0
Random: 4f a1 c1 eb e3 fb 00 a9
        c8 25 25 48 6f 89 27 ec
        bb 80 f3 8c 5d db f7 6c
        94 56 d8 34 7a b5 9d 02
SessionID Length: 20 (32 bytes)
SessionID: 54 ab 20 ea 05 a6 38 6f
           ee 55 40 ae af e2 5d ae
           2a 4d c1 c6 f4 09 a7 08
           b1 c5 49 39 87 82 d3 f7
Cipher Suite: 00 39
Compression method: 00

但是我无法理解应该如何解释最后7个字节：00 05 ff 01 00 01 00

Answer 1

这将是renegotiation_info中定义的o If this is the initial handshake for a connection, then the "renegotiated_connection" field is of zero length in both the ClientHello and the ServerHello. Thus, the entire encoding of the extension is ff 01 00 01 00. The first two octets represent the extension type, the third and fourth octets the length of the extension itself, and the final octet the zero length byte for the "renegotiated_connection" field.扩展名：

{{1}}

SSL serverhello消息中未指定的字节

1 个答案: