CN101047699A - Method and device for BGP updating message protection and verification - Google Patents
Method and device for BGP updating message protection and verification Download PDFInfo
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- CN101047699A CN101047699A CNA2006100605508A CN200610060550A CN101047699A CN 101047699 A CN101047699 A CN 101047699A CN A2006100605508 A CNA2006100605508 A CN A2006100605508A CN 200610060550 A CN200610060550 A CN 200610060550A CN 101047699 A CN101047699 A CN 101047699A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/12—Applying verification of the received information
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Abstract
This invention provides a protection and verification method and a device for updated information of BGP, in which, an update information generator computes abstracts to the updated information and accumulates them to generate complete protection information based on the accumulated abstract information, and the result of the protection information is sent along with the accumulated updated information, a receiver receives the updated information with complete protection information to carry out complete protection information verification to the accumulated abstract information.
Description
Technical field
The invention belongs to computer network communication field, the method and the device of particularly a kind of bgp update message protection and checking.
Background technology
Border Gateway Protocol (BGP) is a kind of Exterior Gateway Protocol, is mainly used in the routing iinformation that distributes between autonomous system (AS).
BGP is a kind of distance vector routing protocol, and bottom transmits by transmission control protocol (TCP).Its reliability of data transmission is just guaranteed by Transmission Control Protocol.In addition, BGP uses routing update increment, trigger-type, rather than the whole routing table of general distance vector protocol, the periodic renewal.In addition, BGP also has the module of multiple measurement routed path, is also referred to as routing property, can judge optimum path more accurately.
By bgp protocol Internet reachability information, these information comprise prefix information, the prefix information of cancelling, path attribute between the AS.One of wherein important path attribute be bgp update information arrive certain network path (AS_PATH) information of AS of process, by can prevent the generation of loop for the inspection of this attribute.
There is some inadequate natural endowment in the bgp protocol design, and some intrinsic safety problems can't solve.For example, judge promptly whether announcement has passed through the AS that enumerates among the AS_PATH really for the checking of the authenticity of as_path attribute.And whether routing iinformation was modified through the AS in the path time.In order to solve the above problems, mainly contain following solution in the prior art:
Adopting updating message AS on the way to carry out signature way proves when in updating message shielded attribute has passed through the path that this AS_PATH represents really and is not modified.In this mode; each AS on the way can carry out the nested mode signature for renewal, and promptly Qian Ming information also comprises the signature section of an AS except content of message; be used to prove that message passed through this AS, and the protection of integrality is provided for previous signature operation.Recipient's testing successively after receiving renewal for each signature section, if check all by show that message transmits through this path really.From the scheme of prior art, we as can be seen, the digital signature in this technical scheme and verification operation exist call frequent, thereby bring system budget to open big problem.
Summary of the invention
The object of the present invention is to provide a kind of method of protection and checking of bgp update message, it can reduce the protection of updating message and the number of times that verification operation calls, thereby reduces system's computing expense.
The invention provides a kind of method of protection and checking of bgp update message, comprise following steps:
Steps A: updating message is produced the survivor updating message that is generated is calculated summary, and summary is accumulated, and according to the summary info generation integrity protection information of accumulation, described protection result of information sends with updating message;
Step B: after updating message recipient receives the updating message that has integrity protection information, the summary info of accumulating is carried out the integrity protection Information Authentication.
Updating message is produced the survivor and is calculated summary according to the content that needs protection in the updating message in the steps A, and described protection content need embody in updating message.
Steps A specifically comprises:
A1, updating message are produced the survivor updating message that is generated are calculated summary, and result of calculation is temporary local, continue to send updating message;
After A2, updating message product survivor sent the updating message of some, according to the summary info generation integrity protection information of accumulation, described protection result of information sent with updating message.
Integrity protection information in the described steps A obtains by digital signature or Hash Message Authentication Code (HMAC).
The product survivor of updating message adds serial number information among updating message.
The account form of making a summary in the steps A adopts the summary info with the last time to calculate summary jointly or calculate a summary separately at each updating message in conjunction with the content of this updating message that needs protection.
The serial number information of the lastest imformation of summary info correspondence need be stored in the steps A.
Before generating integrity protection information, updating message is produced the survivor and will be sorted for summary according to sequence number.
After step B, also comprise,
Step C, updating message recipient use and carry out digest calculations with the identical digest calculations mode of update information generation person at the protection content of appointment in the updating message, and will make a summary and the sequence number of the pairing updating message of described summary is saved in this locality.
Step C specifically comprises, updating message recipient verifies the filtering information that starts updating message, be filtered if described checking starts updating message, then the updating message recipient need preserve in the summary info that is filtered in the described updating message and sequence number and the updating message summary and the serial number information that is filtered among the updating message recipient formerly.
Also comprise behind the step C:
Behind the summary info of the recipient of step D, updating message according to sequence number ordering buffer memory; employing is carried out the integrity protection information calculations with the identical integrity protection account form of the sender of updating message; and the result of calculation of integrity protection information compared with the integrity protection information of carrying in the updating message; if the two unanimity is then verified by integrity protection.
Step D specifically comprises; if having the updating message of integrity protection information is filtered by local policy; the recipient of updating message need take out its additional summary info, sequence number and integrity protection authorization information from described updating message; and take out the local same updating message that is filtered and send out summary info, the sequence number that the survivor is correlated with, updating message recipient continues to transmit after with above information combination.
The present invention also provides a kind of device of protection and checking of updating message, comprising:
Updating message produces processing module, produces the survivor by updating message and calls, and is used to carry out the generation of updating message and sends handle;
The updating message receiving processing module, the recipient calls by updating message, is used for the updating message of being received is verified.
Also comprise:
The integrity protection information generating module is produced the survivor by updating message and is called, and is used to generate integrity protection information;
Integrity protection Information Authentication module, the recipient calls by updating message, is used to verify integrity protection information.
Also comprise:
Summary buffer memory 1, the recipient calls by updating message, is used for the still not verified updating message that receives is carried out buffer memory;
Summary buffer memory 2, the recipient calls by updating message, is used to store the summary info that is filtered out by local policy.
Also comprise:
Digest calculations/maintenance module produces the survivor by updating message recipient and updating message and calls respectively, is used for calculating summary, and safeguards summary buffer memory 1 and summary buffer memory 2.
Also comprise:
Local policy 1, the recipient calls by updating message, is used for the local policy storehouse of storage update message screening, and updating message recipient determines whether to filter relevant updating message according to the information in this policy library;
Local policy 2, the recipient calls by updating message, is used for storage update message checking result's local policy storehouse, and the recipient of updating message is according to the relevant processing policy of this policy library inquiry of checking result queries of updating message.
By the present invention; updating message is produced the summary generation integrity protection information of survivor for a plurality of updating message; updating message recipient carries out the checking of integrity protection information for the summary info of a plurality of renewals; thereby updating message protection and verification operation are often in the solution prior art; the big problem of system's operation expense, and alleviate because the influence that a large amount of calculating that the security mechanism that protection advertising of route information is introduced causes bring the network equipment.
Description of drawings
Fig. 1 is the application scenarios figure of one embodiment of the invention;
Fig. 2 is the entity function illustraton of model of one embodiment of the invention;
Fig. 3 is that the common updating message of one embodiment of the invention produces flow chart;
Fig. 4 is the generation flow chart that the checking of one embodiment of the invention starts updating message;
Fig. 5 is the reception process chart of the common updating message of one embodiment of the invention;
Fig. 6 is the reception process chart that the checking of one embodiment of the invention starts updating message.
Specific embodiments
Below in conjunction with drawings and Examples the present invention is further specified, but do not represent limitation of the invention.
The practical application scene of present embodiment is referring to Fig. 1.Comprise updating message product survivor and updating message recipient among the figure.Wherein updating message product survivor's function is the initial bgp update message of generation and transmits between the AS territory.Updating message recipient's function is that the updating message that will receive is transmitted between the AS territory.The function of producing survivor and recipient is relative, and being directed to certain entity of prefix may be to produce the survivor, and is the recipient at another prefix.
The entity of this programme (upgrade to produce the survivor or upgrade the recipient) functional mode figure is referring to Fig. 2,
Local policy 1, the recipient calls by updating message, is used for the local policy storehouse of storage update message screening, and updating message recipient determines whether to filter relevant updating message according to the information in this policy library;
Local policy 2, the recipient calls by updating message, is used for storage update message checking result's local policy storehouse, and the recipient of updating message is according to the relevant processing policy of this policy library inquiry of checking result queries of updating message.
" updating message generation processing module " produced the survivor by updating message and called, and is used to carry out the generation of updating message and sends handle.
" updating message receiving processing module " called by the updating message recipient, is used to handle the updating message of receiving, carries out the operation of follow-up checking and message propagation.
The integrity protection information generating module is produced the survivor by updating message and is called, and is used to generate integrity protection information;
Integrity protection Information Authentication module, the recipient calls by updating message, is used to verify integrity protection information.
Summary buffer memory 1, the recipient calls by updating message, is used for the still not verified updating message that receives is carried out buffer memory;
Summary buffer memory 2, the recipient calls by updating message, is used to store the summary info that is filtered out by local policy.
The digest calculations module is produced the survivor by updating message recipient and updating message and is called respectively, is used for calculating summary.
Upgrade the product survivor and can produce two kinds of updating message, common message and checking start message.
Wherein, integrity protection information can be to wait other modes to obtain by digital signature or Hash Message Authentication Code (HMAC).The present invention specifically is that example illustrates implementation procedure of the present invention with the digital signature,
With reference to Fig. 3, the production method of common updating message of the present invention is as follows:
Step 301: updating message is produced the survivor and is generated bgp update message, generates a sequence number simultaneously and described sequence number is joined in the described updating message.Described sequence number is used for updating message of unique identification and can reflects the order of updating message, and addition manner can use the mode of standard BGP expansion.
Step 302: updating message is produced the survivor at the information calculations summary info that will protect in upgrading, and the summary result who calculates is saved in " summary buffer memory 1 " together with the pairing sequence number of described updating message.The part that needs protection in the updating message can adopt the mode of local configuration to specify, for example the path attribute of appointment and prefix etc.
Simultaneously, the range information of the part that needs protection will join updating message, uses when verifying with recipient, and its adding mode can be used the mode of standard BGP expansion.
Step 303: the updating message that updating message product survivor will be contained sequence number and protection range information requires to send according to bgp protocol.
With reference to Fig. 4, the production method of checking startup updating message of the present invention is as follows:
Step 401: updating message is produced the survivor and is generated bgp update message, generates a sequence number simultaneously and described sequence number is joined in the described updating message.The mode of the interpolation of sequence number can be used the mode of standard BGP expansion.
Step 402: updating message is produced the survivor at the information calculations summary info that will protect in upgrading, and the summary result that calculates is saved in " summary buffer memory 1 " together with the renewal serial number information of correspondence.The part that needs protection in the updating message can adopt the mode of local configuration to specify, for example the path attribute of appointment and prefix etc.
Simultaneously, the range information of the part that needs protection will join in the updating message, uses when verifying with recipient, and the mode of its adding can be used the mode of standard BGP expansion.
Step 403: updating message is produced the survivor " summary buffer memory 1 " middle summary info of accumulating is finished signature after sorting according to sequence number.
In realization of the present invention, definite quantity of the summary info of accumulation that needs can be by the product survivor decision of updating message.
Step 404: updating message is produced the survivor described signing messages is appended in the updating message, and the summary and the pairing serial number information of renewal that filters out because of the local filter strategy of preservation in " summary buffer memory 2 " are appended in the updating message, final message is externally sent.
In specific implementation of the present invention, if crossing, the information of adding in this step can be divided into a plurality of messages transmissions at most, also can send the special-purpose message that only comprises the checking relevant information and do not comprise prefix information.
With reference to Fig. 5, the receiving handling method of common updating message of the present invention is as follows:
Step 501: updating message recipient is according to the range information that needs protection that provides in the updating message that receives, and part is calculated summary for needing protection.And will make a summary and the updating message corresponding sequence number is saved in " summary buffer memory 1 ".
Step 502: the updating message inquiry " local policy 1 " of updating message recipient to being received, judge whether updating message can be filtered by local policy.
Step 503: if updating message can be filtered out after using " local policy 1 ", updating message recipient then is kept at self summary and serial number information in " summary buffer memory 2 ".
Step 504: if updating message can not filtered accent after using " local policy 1 ", updating message then continues to transmit lastest imformation.
With reference to Fig. 6, the receiving handling method of checking startup updating message of the present invention is as follows:
Step 601: updating message recipient is according to the range information that needs protection in the updating message that receives, and part is calculated summary for needing protection.And will make a summary and the updating message corresponding sequence number is saved in " summary buffer memory 1 ".Additional summary and the serial number information that carries in this updating message is written in " summary buffer memory 1 ".
Step 602: updating message recipient takes out in " summary buffer memory 2 " and produces summary info and the corresponding sequence number that the survivor is correlated with updating message, and described information is appended in this updating message, prepares follow-up overseas publicity.
Step 603: updating message recipient takes out in " summary buffer memory 1 " and produces summary info and the corresponding sequence number that the survivor is correlated with updating message, arranges the summary back according to sequence number summary is carried out signature verification.Processing according to the result of signature verification and local follow-up this updating message of strategy decision.
" local policy 2 " depended in the subsequent processes action.If for example signature verification failure can select to abandon this lastest imformation, also can select to keep this lastest imformation.
Step 604: updating message recipient uses " local policy 1 " to described updating message, judges whether message can be filtered by " local policy 1 "." local policy 1 " can be for the filtering policy that receives message etc.
Step 605: updating message recipient verifies the filtering information that starts updating message, if starting updating message, described checking is filtered, then the updating message recipient takes out its additional summary info, sequence number and signing messages from described updating message, and from " summary buffer memory 2 ", take out and send out summary info, the sequence number that the survivor is correlated with updating message, updating message recipient continues transmission after with above information combination.
In implementation procedure of the present invention, checking starts updating message and is filtered, but the summary that is filtered, serial number information and signing messages must transmit, and the routing iinformation in the updating message can not transmitted.
Step 606: if described checking startup updating message is not filtered, updating message recipient appends to continuation transmission in this lastest imformation with summary and the serial number information that same updating message product survivor in " summary buffer memory 2 " is correlated with.
Step 607: updating message recipient produces the relevant summary info of survivor with " summary buffer memory 1 " with same updating message in " summary buffer memory 2 " and discharges.
In addition; in realization of the present invention; updating message is produced the survivor and the updating message recipient need adopt same digest calculations mode and integrity protection verification mode; could guarantee passing through of authentication like this; for example can consult digest algorithm, signature algorithm by BGP standard agreement extension mechanism between the two, also can be by in each updating message, adding digest algorithm, the signature algorithm that identification information shows employing.
The present invention also provides a kind of prioritization scheme of making a summary and producing and storing, and promptly the recipient appends to calculating summary in this lastest imformation with the summary info last time that upgrades the sender after receiving new lastest imformation.Be not filtered corresponding each renewal sender under the situation in updating message, this locality only keeps a summary info.
More than be that preferred implementation of the present invention is described, those skilled in the art is in the scheme scope of the technology of the present invention, and common variation and the replacement carried out all should be included in protection scope of the present invention.
Claims (17)
1, the method for a kind of protection of bgp update message and checking is characterized in that, comprises following steps:
Steps A: updating message is produced the survivor updating message that is generated is calculated summary, and summary is accumulated, and according to the summary info generation integrity protection information of accumulation, described protection result of information sends with updating message;
Step B: after updating message recipient receives the updating message that has integrity protection information, the summary info of accumulating is carried out the integrity protection Information Authentication.
2. the method for the protection of updating message as claimed in claim 1 and checking is characterized in that: updating message is produced the survivor and is calculated summary according to the content that needs protection in the updating message in the steps A, and described protection content need embody in updating message.
3. the method for the protection of updating message as claimed in claim 1 or 2 and checking, it is characterized in that: steps A specifically comprises:
A1, updating message are produced the survivor updating message that is generated are calculated summary, and result of calculation is temporary local, continue to send updating message;
After A2, updating message product survivor sent the updating message of some, according to the summary info generation integrity protection information of accumulation, described protection result of information sent with updating message.
4, the method for the protection of updating message as claimed in claim 1 and checking is characterized in that, the integrity protection information in the described steps A is to obtain by digital signature or Hash Message Authentication Code HMAC.
5, the method for the protection of updating message as claimed in claim 1 and checking is characterized in that, the product survivor of updating message adds serial number information among updating message.
6. the method for the protection of updating message as claimed in claim 1 or 2 and checking is characterized in that: the account form of making a summary in the steps A adopts the summary info with the last time to calculate summary jointly or calculate a summary separately at each updating message in conjunction with the content of this updating message that needs protection.
7. the method for the protection of lastest imformation as claimed in claim 5 and checking, it is characterized in that: the serial number information of the lastest imformation of summary info correspondence need be stored in the steps A.
8. as the protection of claim 5 or 7 described lastest imformations and the method for checking, it is characterized in that: before generating integrity protection information, updating message is produced the survivor and will be sorted for summary according to sequence number.
9. the method for the protection of lastest imformation as claimed in claim 7 and checking is characterized in that: after step B, also comprises,
Step C, updating message recipient use with the identical digest calculations mode of update information generation person at
The protection content of appointment in the updating message is carried out digest calculations, and will make a summary and the sequence number of the pairing updating message of described summary is saved in this locality.
10. the method for the protection of lastest imformation as claimed in claim 9 and checking; it is characterized in that: step C specifically comprises; updating message recipient verifies the filtering information that starts updating message; be filtered if described checking starts updating message, then the updating message recipient need preserve in the summary info that is filtered in the described updating message and sequence number and the updating message summary and the serial number information that is filtered among the updating message recipient formerly.
11. the protection of lastest imformation as claimed in claim 10 and the method for checking is characterized in that: also comprise behind the step C:
Behind the summary info of the recipient of step D, updating message according to sequence number ordering buffer memory; employing is carried out the integrity protection information calculations with the identical integrity protection account form of the sender of updating message; and the result of calculation of integrity protection information compared with the integrity protection information of carrying in the updating message; if the two unanimity is then verified by integrity protection.
12. the protection of lastest imformation as claimed in claim 11 and the method for checking; it is characterized in that: step D specifically comprises; if having the updating message of integrity protection information is filtered by local policy; the recipient of updating message need take out its additional summary info, sequence number and integrity protection authorization information from described updating message; and take out the local same updating message that is filtered and send out summary info, the sequence number that the survivor is correlated with, updating message recipient continues to transmit after with above information combination.
13, the device of a kind of protection of updating message and checking is characterized in that, comprises with the lower part:
Updating message produces processing module, produces the survivor by updating message and calls, and is used to carry out the generation of updating message and sends handle;
The updating message receiving processing module, the recipient calls by updating message, is used for the updating message of being received is verified.
14, device as claimed in claim 13 is characterized in that, also comprises:
The integrity protection information generating module is produced the survivor by updating message and is called, and is used to generate integrity protection information;
Integrity protection Information Authentication module, the recipient calls by updating message, is used to verify integrity protection information.
15, device as claimed in claim 13 is characterized in that, also comprises:
Summary buffer memory 1, the recipient calls by updating message, is used for the still not verified updating message that receives is carried out buffer memory;
Summary buffer memory 2, the recipient calls by updating message, is used to store the summary info that is filtered out by local policy.
16, device as claimed in claim 15 is characterized in that, also comprises:
Digest calculations/maintenance module produces the survivor by updating message recipient and updating message and calls respectively, is used for calculating summary, and safeguards summary buffer memory 1 and summary buffer memory 2.
17, device as claimed in claim 13 is characterized in that, also comprises:
Local policy 1, the recipient calls by updating message, is used for the local policy storehouse of storage update message screening, and updating message recipient determines whether to filter relevant updating message according to the information in this policy library;
Local policy 2, the recipient calls by updating message, is used for storage update message checking result's local policy storehouse, and the recipient of updating message is according to the relevant processing policy of this policy library inquiry of checking result queries of updating message.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100605508A CN101047699A (en) | 2006-04-27 | 2006-04-27 | Method and device for BGP updating message protection and verification |
| PCT/CN2007/001401 WO2007128212A1 (en) | 2006-04-27 | 2007-04-26 | An update message protect and validate method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100605508A CN101047699A (en) | 2006-04-27 | 2006-04-27 | Method and device for BGP updating message protection and verification |
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| CN101047699A true CN101047699A (en) | 2007-10-03 |
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| CNA2006100605508A Pending CN101047699A (en) | 2006-04-27 | 2006-04-27 | Method and device for BGP updating message protection and verification |
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| CN (1) | CN101047699A (en) |
| WO (1) | WO2007128212A1 (en) |
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| CN105704681A (en) * | 2014-11-25 | 2016-06-22 | 北京信威通信技术股份有限公司 | Meticulous monitoring method of end-to-end encrypted call |
| CN114537482B (en) * | 2020-11-26 | 2023-05-05 | 比亚迪股份有限公司 | Method, device and storage medium for checking track traffic information data |
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| KR100744935B1 (en) * | 2001-09-26 | 2007-08-01 | 주식회사 케이티 | System and method for automatically configuring router for optimal routing between ISPs |
| ITTO20020762A1 (en) * | 2002-09-02 | 2004-03-03 | Telecom Italia Lab Spa | PROCEDURE AND SYSTEM FOR REALIZING CONNECTIVITY ESTIMATES |
| CN100359968C (en) * | 2003-09-19 | 2008-01-02 | 华为技术有限公司 | Method for changing group key in group system |
| JP4372646B2 (en) * | 2004-08-27 | 2009-11-25 | Ｋｄｄｉ株式会社 | Information generator |
| CN100413290C (en) * | 2005-11-11 | 2008-08-20 | 清华大学 | Method for setting up notification function for route selection according to border gateway protocol |
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Open date: 20071003 |