yes, SNMP does send encrypted PDU. I had almost forgotten my Engineering
project. I opened up the documentation of my project and found out that it
does send packets after encryption.
On Tue, Dec 7, 2010 at 1:49 PM, Sampige, Sahana Prabhakar (R&D Bangalore) <
[email protected]> wrote:
> I did try to find some documentation on this, but no success. But the
> source code does indicate that snmp_sess_send does encrypt the pdu. Below is
> a bt of a sample test program which sends data using snmp_sess_send
>
>
> #0 sc_encrypt (privtype=0x8450b30, privtypelen=10, key=0x8452010
> "ƺ3IgP\003R\024i�\034�ޢ\022", keylen=16, iv=0xbfc77d38
> "\024i�b��~p^w�", ivlen=8,
> plaintext=0x846ebf6 "0P\004\r\200", ptlen=82, ciphertext=0x846dff0
> "h\003%", ctlen=0xbfc77d54) at scapi.c:648
> #1 0x00c945ff in usm_rgenerate_out_msg (msgProcModel=0,
> globalData=0x843cb15 "\002\001\0030\021\002\0043W�T\002\003",
> globalDataLen=22, maxMsgSize=1472,
> secModel=3, secEngineID=0x8420c20 "\200", secEngineIDLen=13,
> secName=0x8450d60 "sahana", secNameLen=6, secLevel=3, scopedPdu=0x846ebf6
> "0P\004\r\200",
> scopedPduLen=82, secStateRef=0x0, wholeMsg=0xbfc78118,
> wholeMsgLen=0xbfc78114, offset=0xbfc78110) at snmpusm.c:1538
> #2 0x00c96361 in usm_secmod_rgenerate_out_msg (parms=0x8452010) at
> snmpusm.c:1267
> #3 0x00c4fa31 in snmpv3_packet_realloc_rbuild (pkt=0xbfc78118,
> pkt_len=0xbfc78114, offset=0xbfc78110, session=0x8422680, pdu=0x846dd08,
> pdu_data=0x0,
> pdu_data_len=0) at snmp_api.c:2748
> #4 0x00c5011d in snmp_build (pkt=0xbfc78118, pkt_len=0xbfc78114,
> offset=0xbfc78110, pss=0x8422680, pdu=0x846dd08) at snmp_api.c:2335
> #5 0x00c54a45 in snmp_sess_async_send (sessp=0x8450880, pdu=0x846dd08,
> callback=0, cb_data=0x0) at snmp_api.c:5052
> #6 0x00c54d6a in snmp_async_send (session=0x8422680, pdu=0x846dd08,
> callback=0, cb_data=0x0) at snmp_api.c:4900
> #7 0x00c54da4 in snmp_send (session=0x8422680, pdu=0x846dd08) at
> snmp_api.c:4886
> #8 0x08048e16 in main (argc=1, argv=0xbfc785f4) at mysnmptrap.c:217
>
> Rgds,
>
> Sahana
>
> ------------------------------
> *From:* Ashwin Kumar [mailto:[email protected]]
> *Sent:* Tuesday, December 07, 2010 12:42 PM
> *To:* Sampige, Sahana Prabhakar (R&D Bangalore)
> *Subject:* Re: Does the snmp_sess_send encrypt the data ?
>
> Dear Prabhakar,
>
> I guess it mostly does. Go through the documentation of Net-SNMP.
>
> On Tue, Dec 7, 2010 at 12:11 PM, Sampige, Sahana Prabhakar (R&D Bangalore)
> <[email protected]> wrote:
>
>> Hi,
>> I am using the net-snmp api's to generate snmp v3 traps. The API I am
>> using is snmp_sess_send. Do I have to encrypt the data or does the net-snmp
>> framework automatically encrypt the data based on the user setting ?
>>
>> Rgds,
>> Sahana
>>
>> ------------------------------------------------------------------------------
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>
>
>
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