{"id":576,"date":"2019-12-12T08:37:27","date_gmt":"2019-12-12T03:07:27","guid":{"rendered":"https:\/\/askadmin.com\/?p=576"},"modified":"2020-07-29T19:32:19","modified_gmt":"2020-07-29T14:02:19","slug":"sip-authentication-response-with-nonce-in-sip-header","status":"publish","type":"post","link":"https:\/\/askadmin.com\/aa\/sip-authentication-response-with-nonce-in-sip-header\/","title":{"rendered":"SIP authentication response with nonce in SIP header"},"content":{"rendered":"

TIP OF THE DAY:<\/strong><\/p>\n

SIP useragent \/Registrar uses digest authentication for SIP authentication.\u00a0 To\u00a0 prevent replay attacks SIP registrar generates an arbitrary number\u00a0 NONCE ( number once) and send to sip client. SIP client uses that NONCE to hash the sip credentials\u00a0 and send to registrar.<\/p>\n

If you have packet capture and want to compare the\u00a0 hashed credentials in response header\u00a0 you can use this script . Change nonce ,authid,pwd,uri and realm\u00a0 values and run the script.<\/p>\n

#!\/usr\/bin\/perl -w<\/em><\/strong>
\nuse Digest::MD5 qw(md5_hex);<\/em><\/strong><\/p>\n

$authid = ‘test’;<\/em><\/strong>
\n$pwd = ‘1234’;<\/em><\/strong>
\n$realm = ‘asterisk’;<\/em><\/strong>
\n$method = ‘REGISTER’;<\/em><\/strong>
\n$uri = ‘sip:sip.test.com’;<\/em><\/strong>
\n$nonce = ‘035cf70b1c4fcf4731150330410151743443’;<\/em><\/strong><\/p>\n

$a1 = md5_hex(“$authid:$realm:$pwd”);<\/em><\/strong>
\n$a2 = md5_hex(“$method:$uri”);<\/em><\/strong>
\nprint md5_hex(“$a1:$nonce:$a2”), “\\n”;<\/em><\/strong><\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

TIP OF THE DAY: SIP useragent \/Registrar uses digest authentication for SIP authentication.\u00a0 To\u00a0 prevent replay attacks SIP registrar generates an arbitrary number\u00a0 NONCE ( number once) and send to sip client. SIP client uses that NONCE to hash the sip credentials\u00a0 and send to registrar. If you have packet […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false},"categories":[1,6],"tags":[178,177,176,175,179],"yoast_head":"\nSIP authentication response with nonce in SIP header - Ask Admin - A Lifelong Learner<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/askadmin.com\/aa\/sip-authentication-response-with-nonce-in-sip-header\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SIP authentication response with nonce in SIP header - Ask Admin - A Lifelong Learner\" \/>\n<meta property=\"og:description\" content=\"TIP OF THE DAY: SIP useragent \/Registrar uses digest authentication for SIP authentication.\u00a0 To\u00a0 prevent replay attacks SIP registrar generates an arbitrary number\u00a0 NONCE ( number once) and send to sip client. SIP client uses that NONCE to hash the sip credentials\u00a0 and send to registrar. 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SIP client uses that NONCE to hash the sip credentials\u00a0 and send to registrar. 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