Manuale d’uso / di manutenzione del prodotto 4.3 del fabbricante RSA Security
Vai alla pagina of 38
RSA BS AFE ® Crypto-C Cryptograph ic Comp onents for C Intel ® Se cu rit y Ha r dwar e User’ s G uide Ve r s i o n 4 . 3.
© 1999 RSA SECU RI TY INC. 001-190 01-430-00 1- 000 Copyri ght Notice © 1999 RSA Securi ty Inc. All righ ts re ser v ed. This work contai n s pr opri eta r y informa tion o f RSA Sec urity I nc. Distribut ion is limited t o auth o rized licensees o f RS A Secur ity I nc.
iii Contents Ch apt er 1 Overview 1 Inte l Hard ware S ecur ity Fe ature s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 RSA BSA FE Cryp to-C I nterfa ce . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv RSA BS AFE Crypto -C I ntel Har dwar e User ’ s Gui de Obt aini ng a R and om Se ed fro m H ardw are . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Ret rievi ng Ha rdw are Er ror Cod es . . . . . . . . . . . . . . . . .
1 Ch apt er 1 Overview RS A Secu r ity Inc. an d Intel Corpor ation have te ame d to provid e C pro g r amme rs acce s s to the Inte l Random Numb e r Gen erator via the RSA BSAFE ® Crypto -C interface.
How This Book Is Organize d 2 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide ce rt ain featu res in th eir BS AFE Crypto -C sof twar e applicat ions.
Chapte r 1 Ov erview 3 Overvie w of a Cry pto-C Hardw are Appli cat ion Overv iew of a Crypto-C Har dware Appli cation Creat ing a Crypto- C applic atio n that can us e Intel’ s security hardwar e f eatur es is similar to crea ting any Crypt o -C app lication.
The S ix-Step Sequence 4 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide The S ix-Ste p Sequenc e Th e model fo r buildin g a ha rdwa re-aware applic ation wit h Cry pto-C is similar t o the six -st ep m odel desc ribed in Ch apter 1 of t h e Cr ypto- C Use r ’ s Manua l .
5 Ch apt er 2 Using Intel Hardware With Crypto -C Cr ypto -C use s th e R SA BS AFE Ha rdwa r e AP I (B HAP I ) to acce ss th e Int el h a rdwa re sec uri ty f ea t u re s . I n or d er to us e th is i nt erf a c e, you n e e d to ma tc h th e a p p ro p ri a t e Cryp t o-C and Intel al gorit h m meth ods vi a a se ssi on cho oser.
Algo rith m Metho ds 6 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide capabilit ies. The AM s requir ed to su pport the In tel secu rity hardw a re are in cluded as par t of Cr ypto- C . As wi th all algor ithm met hods, th e hardw a re -compa ti ble AMs i n Crypto -C are only availabl e for c ertain algorithm info types ( AIs ).
Chapte r 2 Using In tel Hardware With C rypto-C 7 The Se ssion Choo ser The S ession Chooser Any Crypto-C applic ation wh ich uses hardwar e requires you r applicati on to declare two ch oose r s: • Th e baseli ne softwa r e choo ser , such as the on e th at is used in any Cr ypto- C appl ic ation.
The S ess ion Choos er 8 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide Creating the Hardw are Chooser A ha rd war e ch oo s e r is a lis t o f m an u f a ct u re r -s up p l ie d HW_T ABL E_ENTRY s. E a ch e ntr y def in es the necess ary co de f or acc essi ng the spe cifi ed piece of hard war e.
Chapte r 2 Using In tel Hardware With C rypto-C 9 Hardware A vail abilit y make the actual Crypto-C function call during the Crypto-C Init step, for ex ample, a s the c h o oser a rg u me n t to B_R andomI nit .
Hardware Err ors 10 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide Ha rd wa re Er ror s If the ha rdwa re fails, C rypto-C w ill ret urn an e rror o f BE_HARDW ARE or BE_NOT_ SUPPORTED . BE_HARDWARE indicates that the Intel p rimit ive ha s returned an er ro r.
Chapte r 2 Using In tel Hardware With C rypto-C 11 Hardware Err ors A_R SA_ EXTE NDED _ER ROR Th is Cryp t o-C s tructure is defin ed sp ecifically for r etrievin g Intel er ror cod es. It is defined as follows: Definit ions: errorCode Th e erro r co de r e turn e d by the Inte l h ardware .
Hardware Err ors 12 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide.
13 Ch apt er 3 Using the Intel R andom N umber Generator This ch apter gi v es s ome b a c k gr ound on rand om numbe r g e nerat ors and shows h ow to us e t h e Intel Ran dom Numbe r Gener at or ( RN G) with a Crypt o-C appli ca tion.
Rand om Numbers 14 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide The Inte l Rand om Numb er Gen erator The Inte l Rando m Numb e r Gener ator is ded icat ed hard ware th at har nesses sy ste m therm al noise t o gener ate rando m va lues. The g enerat or is fre e- running, accumu lating rando m bits of dat a until a 32-bit buffer is filled.
Chapte r 3 Us ing the Inte l Rando m Number Generato r 15 Random Numb ers Pseudo-Random Number Generators (PR NGs) Crypto-C provides several pseud o-ra ndom n umber generators that can be seeded vi a the I ntel RNG a nd used t o gener ate r an dom numbe rs.
Genera ting Ra ndom Numbers 16 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide Genera ting Random Numbers This example demonstrates how to use the Int el Hardware Random N umb er Ge nerato r to se ed a soft war e-based p se u do-ran d om number ge n erat or (PRN G).
Chapte r 3 Us ing the Inte l Rando m Number Generato r 17 Generati ng Random Numb ers Step 1: Creat e an Algorithm O bject Th e ne xt task is to creat e the al gorithm objec t. This ob ject w ill contr ol the ra ndom b yte gen e ra tion. Creat ing the objec t only alloc ate s t he memor y neede d for the pr ocess.
Genera ting Ra ndom Numbers 18 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide Step 4: Updat e the Random Object Step 4 is not needed fo r random number seeding in h ardware. Step 5: Gener ate Random By tes Gene rate the rando m bytes f or the seed.
Chapte r 3 Us ing the Inte l Rando m Number Generato r 19 Generati ng Random Numb ers Step 6b: Free the Session Chooser Fr ee the se ssi on ch oo ser. It is import ant to fre e th e sessi on choo ser, so th at any ha nd les to h ar dw are an d al loc a ted me mor y a re rele as ed .
Genera ting Ra ndom Numbers 20 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide software. After the seed has been passed to t he sof tware algorithm info type, this is similar to any Cr ypt o-C PRNG implementation. The o nly difference is the fast, truly random, seed o peration.
Chapte r 3 Us ing the Inte l Rando m Number Generato r 21 Generati ng Random Numb ers Step 3: Initial ize the Ra ndom Algorithm To i niti ali z e t he ra ndom al gorit h m, y ou mu st pass th e alg or ithm o b ject , the algo r ithm ch ooser, and a sur re n der co n t ext.
Genera ting Ra ndom Numbers 22 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide call would be identic al in a software imple m ent a tion: Step 5: Gener ate Random Numb ers Befo re calling B_Gen erateR andomBy tes , prepare a buffer f or receiving the random byte s.
23 Appe ndix A Crypto- C Error Codes Table A-1 lists th e hardware-relate d error v alues returned by Crypto-C. If Crypto-C rec eive s a ha rdwa re-le ve l er ror fro m t he In tel ha rdwa re, C ryp to -C will retu rn BE_HAR DWA RE .
24 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide.
25 Appe ndix B Intel Security H ardware E rror Codes Table B-1 l ists the error val u es returned by the underlying Intel har dw a re. If Crypto-C ret urn s an e rro r of BE_ HARDWAR E , t he u nde r lying Intel er ror co de can b e retr ieved using the Crypto-C function B_GetE xtende dErrorI nfo .
26 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide.
27 Appe ndix C Redistributing t he Intel Security Driver Deter mining That the Fi rmware Hub Is Inst alled on the T arget Sy stem Before installin g the In tel Secur ity Driver , you sh ould ve rify t.
Redi stribu ting the D river 28 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide Redis t r ibuti ng the Drive r Th e Intel Sec urity D river ca n be redistri buted in two w ays: via a sil ent ins t all (usi ng Inst allShie l d ) or v i a .inf fi l e s.
Appen dix C Red istributing the Intel S ecurity Dr iver 29 Redistri buting the Dri v er Files Inst alled Th e silent ins tall pla ces the driver files in the followi ng locatio ns: Fil e O/S Locat ion De scrip tion ISECD RV . S YS Mi cr osoft Wi ndo w s NT 4.
Redi stribu ting the D river 30 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide Re di s tri b uti ng th e Driv er vi a .i nf Fi le s Instead o f running the InstallSh ield si lent install, described above, you can have the use r i ns tall th e driv e r on the tar get sy st em by do i ng the fol lowi n g.
Appen dix C Red istributing the Intel S ecurity Dr iver 31 Redistri buting the Dri v er Microsoft Windows 95 1. Copy t he foll o wing files f ro m t he Crypto -C C D to a f l oppy di sk . RED IS TRIB INF Win9 5 IS D_ 95.IN F IS EC DRV.V XD 2. Lo g on to th e ta rg e t sy st e m .
Redi stribu ting the D river 32 RSA B SAFE Crypto -C Intel H ardwa re User’ s Guide Microsoft Windows 98 1. Copy t he foll o wing files f ro m t he Crypto -C C D to a f l oppy di sk . RE DI STRIB INF WDM IS D_ WDM.I NF IS EC DRV.S YS IS D_ CAT.C AT 2.
33 In dex A alg o ri t hm i nf o t y p e 3 AI_HW _Random 6 su pp or t fo r ha rd w a re 6 algor it hm metho d 3 , 5 AM _HW_RA NDO M 6 , 16 ha rd wa re m eth o d co r res po ndin g to 8 h ard wa re- aw.
34 RSA BSAFE Crypto-C Intel Security Hardware Us er’ s Gui de.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il RSA Security 4.3 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del RSA Security 4.3 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso RSA Security 4.3 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul RSA Security 4.3 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il RSA Security 4.3, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del RSA Security 4.3.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il RSA Security 4.3. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo RSA Security 4.3 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
