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]<mailto:[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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