[exim] system_filter to regex_mime

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Autor: Silmar A. Marca
Data:  
A: exim-users
Assumpte: [exim] system_filter to regex_mime
I need help to convert my system_filter to regex_mime expression. All
expressions RUN OK and are tested in my client servers. I convert for use in
"acl_smtp_mime" and "acl_smtp_data"...

The acls is:
1) Block URL to executable (exe, com, pif etc...)
2) Block IMG SRC witch cgi query, for valiate email of users (Spyware Images:
img src=....?=idofuser=UID)
3) Block Script.ENCODE binary deny
4) Block Embeebed Object in Mail

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#1) Virus tipo link para Executaveis
if $message_body matches "(?ixm-s)\
        (?:(?:<[^>=]*)(?:href|src)(?:\\\\s*=)(?:3D)?)?\
        ((?:\"?)\
         (?:(?:http[s]?|ftp)://[^\"\? ]+/)\
         (?:[^\"\?. ]+(?:\\\\.|2E))+\


(?:ad[ep]|asd|ba[st]|chm|cmd|com|cpl|crt|dll|exe|hlp|hta|in[fs]|isp|jse?|\

jar|lnk|md[bez]|ms[cipt]|ole|ocx|pcd|pif|reg|sc[rt]|sh[sb]|sys|url|vb[es]?|vxd|ws[cfh]|cab)\
        (?:[?][=])?(?:\"?)\\\\s(?:<[^<]*)?)"
then
   fail text "This message contains an unwanted link for binary file\n\
             Link: $1"
  seen finish
endif


#2)Teste de Email atraves de Imagens SRC
if $message_body matches "(?ixm-s)\
        (?:src=)(?:3D)?\
        ((?:\"?)\
         (?:(?:http[s]?|ftp)://[^\"\? ]+/)\
         (?:[^\">])*(?:[?&])(?:[^\">])*\
        (?:\"?))(?:[^>]*>)"
then
   fail text "This message contains an unwanted link for embebbed cgi\n\
             Src: $1"
  seen finish
endif


#3)Virus tipo Assinatura OUTLOOK
if $message_body matches "(?ixm-s)\
        (?:SCRIPT)(?:[^\"=>]*language=)?(?:3D)?\
                ([^\">]* \
                 (?:Encode) \
                [^\">]*)"
then
   fail text "This message contains an unwanted script encode\n\
             Script: $1"
  seen finish
endif


#4) Objetos Vinculados
if $message_body matches "(?ixm-s)\
        (?:OBJECT)\
        (.*)\
        (?:[>].*[<].*)(?:OBJECT)"
then
  fail text "This message contains an unwanted link for embebbed object\n\
             Obj: $1"
  seen finish
endif




-------------------------------------------------------------
Cordialmente, Silmar A. Marca
GrupoGSN - Desenvolvimento, Implantação e Verificação de Servidores
Profissionais baseados em Linux/Novell