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RSA Security 4.3 Generate Random Numbers, Destroy all Objects, Generating Random Numbers, break

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Step 5: Generate Random Numbers

Generating Random Numbers

call would be identical in a software implementation:

if ((status = B_RandomUpdate (randomAlgorithm, randomSeed, randomSeedLen, (A_SURRENDER_CTX *)NULL_PTR)) != 0)

break;

Step 5: Generate Random Numbers

Before calling B_GenerateRandomBytes, prepare a buffer for receiving the random bytes. This is a little different than the software implementation.

randomByteBuffer = T_malloc (BYTES_TO_GENERATE); if ((status = (randomByteBuffer == NULL_PTR)) != 0)

break;

T_memset (randomByteBuffer, 0, BYTES_TO_GENERATE);

Now you can generate the random bytes. Since generating 128 bytes is quick, you can use a NULL_PTR for the surrender context:

if ((status = B_GenerateRandomBytes

(randomAlgorithm, randomByteBuffer, BYTES_TO_GENERATE, (A_SURRENDER_CTX *)NULL_PTR)) != 0)

break;

Step 6: Destroy all Objects

Remember to destroy all objects when you are done with them, and free all memory. Again, this is identical to the software implementation:

B_DestroyAlgorithmObject (&randomAlgorithm);

T_memset (randomSeed, 0, randomSeedLen);

T_free (randomSeed);

T_free (randomByteBuffer);

2 2	R S A B S A F E C r y p t o - C I n t e l H a r d w a r e U s e r ’s G u i d e

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RSA Security 4.3 manual Generate Random Numbers, Destroy all Objects, Generating Random Numbers, break

Contents

RSA BSAFE Cryptographic Components for CCrypto-C Intel Security Hardware User’s Guide001-19001-430-001-000 Copyright Notice1999 RSA SECURITY INC Overview ContentsUsing Intel Hardware With Crypto-C ChapterIndex Crypto-C Error CodesIntel Security Hardware Error Codes Appendix A Appendix B Appendix CRSA BSAFE Crypto-CInterface Intel Hardware Security FeaturesOverview ChapterHow This Book Is Organized How This Book Is OrganizedAdditional Documentation Overview of a Crypto-CHardware Application Overview of a Crypto-CHardware ApplicationThe Six-StepSequence The Six-StepSequenceUsing Intel Hardware With Crypto-C Algorithm MethodsCrypto-CAlgorithm Methods ChapterIntel Hardware Algorithm Methods Algorithm MethodsCreating the Software Chooser The Session ChooserCreating the Session Chooser The Session ChooserThe Session Chooser Creating the Hardware ChooserCreating the Session Chooser if status = B CreateSessionChooserHardware Availability Hardware AvailabilityHardware Errors Hardware ErrorserrorMsg A RSA EXTENDED ERRORerrorCode DefinitionsHardware Errors Chapter Using the Intel Random Number GeneratorRandom Numbers Whitening Hardware Results Using the Intel RNGThe Intel Random Number Generator Unavailability of HardwarePseudo-RandomNumber Generators PRNGs Random NumbersStep 0 Create the Session Chooser Generating Random NumbersObtaining a Random Seed from Hardware Generating Random NumbersStep 3 Initialize the Random Object Step 1 Create an Algorithm ObjectStep 2 Set the Algorithm Object Generating Random NumbersStep 6 Destroy All Objects Step 4 Update the Random ObjectStep 5 Generate Random Bytes Step 6a Destroy the Algorithm ObjectStep 6b Free the Session Chooser Retrieving Hardware Error CodesGenerating Random Numbers in Software Generating Random NumbersGenerating Random Numbers Step 1 Create an Algorithm ObjectStep 2 Set the Algorithm Object if status = B SetAlgorithmInfoGenerating Random Numbers Step 3 Initialize the Random AlgorithmStep 4 Seed the Random Object Generating Random Numbers Step 5 Generate Random NumbersStep 6 Destroy all Objects breakCrypto-CError Codes Appendix APage Appendix B Intel Security Hardware Error CodesTable B-1 Intel Security Hardware Error Codes Page Redistributing the Intel Security Driver Appendix CRedistributing the Driver Redistributing via a Silent Installsetup -s Redistributing the DriverFile Files InstalledRedistributing the Driver LocationRedistributing the Driver Redistributing the Driver via .inf FilesMicrosoft Windows NT Redistributing the Driver 4.Click Start Settings Control PanelMicrosoft Windows Redistributing the Driver 4.Click Start Settings Control PanelMicrosoft Windows 2.Log on to the target systemIndex