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AS2协议详解(五) -- 消息报文结构

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AS2报文包括如下四种情况(注意AS2 1.1支持对报文进行压缩传输)
 
 一、情景1( No encryption, no signature)没有加密,没有数字签名
  MIME只有一个主体:传递报文的明文,如下 
 
application/xxxx根据报文格式不同而不同,如application/octet-stream,application/xml,application/edifact.下同
AS2头
content-type: application/xxxx
AS2头


报文明文

 

二、 情景2 (No encryption, signature)没有加密,有数字签名
  MIME包括两个并列的主题
  ----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz指分割符,不同实现不同但是往往比较长和复杂。
AS2头
content-type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
AS2头

----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Content-Type: application/octet-stream
主体相关的头

报文明文

----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Content-Type: application/pkcs7-signature; name=smime.p7s; smime-type=signed-data
主体相关的头

数字签名(签名算法在AS2头中给出,本例子使用sha1)
----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
 

 

三、情景3 (Encryption, no signature)加密没有签名
  MIME外层只有一个主体
AS2头
content-type: application/pkcs7-mime; name="smime.p7m"; smime-type=enveloped-data
AS2头

加密后的报文 (加密前是一个仅仅包含报文,content type为 application/xxxx的MIME包)
 

 

 
四、情景4 Encryption, signature(加密,数字签名)
    MIME外层只有一个主体
 
AS2头
content-type: application/pkcs7-mime; name="smime.p7m"; smime-type=enveloped-data
AS2头

加密后的报文(是与情景2类似的MIME包-不包含AS2头)

 

 
 五、MDN回执有不签名和签名两种情景
 
 5.1 情景1  MDN over HTTP, no signature(不签名)
AS2头
Content-Type: multipart/report; report-type=disposition-notification; boundary="----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
AS2头

----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: binary

The message you sent on "Tue, 26 Oct 2010 04:32:24 GMT" from "xxxxxx" to
"yyyyyyyy" with subject "AS2 test message" has been received successfully on 26
Oct 2010 04:32:24 GMT and this is no guarantee that the message has been read or understood.

----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Content-Type: message/disposition-notification
Content-Transfer-Encoding: binary

Reporting-UA: 223.1.1.128; XXXXXXXXXXXXXXXXXXXXX
Original-Recipient: yyyyyyyyyyy
Final-Recipient: yyyyyyyyyy
Original-Message-ID: <1295227776399941288067544796>
Disposition: automatic-action/MDN-sent-automatically; processed
Received-content-MIC: poaQNS6MuGVvDwqONFw9L8Ng6jk=, sha1

----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
 

 

 
5.2 情景2  MDN over HTTP, signature(签名)
  -----yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy:指另外一个分割符
AS2头
Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"

AS2头

----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Content-Type: multipart/report; report-type=disposition-notification;boundary="-----yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy"

-----yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: binary

The message you sent on "Tue, 26 Oct 2010 04:32:24 GMT" from "xxxxxx" to
"yyyyyyyy" with subject "AS2 test message" has been received successfully on 26
Oct 2010 04:32:24 GMT and this is no guarantee that the message has been read or understood.

-----yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
Content-Type: message/disposition-notification
Content-Transfer-Encoding: binary

Reporting-UA: 223.1.1.128
Original-Recipient: yyyyyy
Final-Recipient: yyyyyyy
Original-Message-ID: <2575437176399941288067570296>
Disposition: automatic-action/MDN-sent-automatically; processed
Received-content-MIC: SNQ7jE8yo/nTyI4AKOKlNQlkQc4=, sha1

-----yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy

----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Content-Type: application/pkcs7-signature; name=smime.p7s; smime-type=signed-data
Content-Transfer-Encoding: binary
Content-Disposition: attachment; filename="smime.p7s"
Content-Description: S/MIME Cryptographic Signature

数字签名

----zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 
 



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