HP UX Security Products and Features Software manual Certiﬁcate Library Services CL API

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Common Data Security Architecture (CDSA) White Paper

Certiﬁcate Library Services (CL) API

Certiﬁcate Library Services (CL) API

What is a Certiﬁcate?

A certiﬁcate is a mechanism for establishing identity. Think of an X.509 certiﬁcate as a packet that can be given safely to others. X.509 derives from a data storage concept for directory services, called X.500, a mechanism that allows individuals to access others’ data.

The most important characteristic about a certiﬁcate is that it can be digitally signed by a Certiﬁcate Authority (CA). An Internet infrastructure is emerging to handle that responsibility.

When a certiﬁcate is “signed”, the contents of the certiﬁcate (such as public key, start validity date, and so forth) are hashed. Then, the hash is signed with the CA’s private key.

The encrypted hash is then also placed in the certiﬁcate as the “signature” of the certiﬁcate.

When someone veriﬁes the authenticity of a certiﬁcate, he or she may need to establish a certiﬁcate chain to verify, then decrypt the signature with the public key at the end of the certiﬁcate chain, rehash the certiﬁcate, and compare the hash to the decrypted hash. He or she may also check the certiﬁcate’s start and end validity dates to verify the certiﬁcate is still valid.

Outline of a Generic Certiﬁcate

All certiﬁcates have the following basic ﬁelds:

•Version ID (Version 1, 2, or 3)

•Serial Number (arbitrary, but should be unique for each Certiﬁcate Authority)

•Signature Algorithm ID (for example, RSA with MD5)

•Issuer Distinguished Name (that is, the Certiﬁcate Authority (CA) who issues the certiﬁcate)

•Start Validity Date

•End Validity Date

•Subject Distinguished Name (that is, the owner or recipient of the certiﬁcate)

•Public Key Algorithm ID (for example, RSA encryption)

•Signature

•Extensions (optional)

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Chapter 1

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Contents Contents Sample Install Program Generating the Credential File Migrating to Cdsa ZIP format Private Key FileCommon Data Security Architecture Cdsa White Paper ChapterGlossary of Cdsa Terms and Acronyms Glossary of Cdsa Terms and AcronymsGlossary of Cdsa Terms and Acronyms RC2 Glossary of Cdsa Terms and Acronyms Glossary of Cdsa Terms and Acronyms Glossary of Cdsa Terms and Acronyms Glossary of Cdsa Terms and Acronyms HP’s Implementation of Cdsa What Is CDSA?What Is CDSA? HP-UX Cdsa Product OverviewWhat Is CDSA? Cdsa Components in HP-UX Cdsa Components on HP-UXWhat Is CDSA? Example of Cdsa APIs Used for Applications vs. Shared Cdsa in the Context of Other Security ApplicationsLibraries CDSA, shown relative to higher-level protocols and user ApplicationsHP’s Paradigm Shift Common Security Services Manager Cssm Common Security Services Manager Cssm APICssm Module Information Files Cssmnotlongfilenamesys Public/Private Key Algorithms Cryptography Service Provider CSP APICryptography Service Provider CSP API Dual Asymmetric Key AlgorithmSymmetric Key Algorithm Authenticating a Digital Signature RC2 or RC4Cryptography Service Provider CSP API Hash Interaction between CSP and Applications CSP Operations Cryptography Service Provider CSP API Cryptography Service Provider CSP API Extensibility Functions Supported Functions and AlgorithmsCssmalgidcdmf Cssmalgiddsa Cssmalgiddh Purpose Pass-Through ID Certiﬁcate Library Services CL API Certiﬁcate Library Services CL APIWhat is a Certiﬁcate? Outline of a Generic CertiﬁcateCertiﬁcate Revocation List CRL and Operations Interaction between Certiﬁcate Library and Application Interaction between Cssm and Certiﬁcate Library Interface Operations on CertiﬁcatesCertiﬁcate Library Interface Certiﬁcate Library Services CL API Certiﬁcate Library Services CL API Certiﬁcate Library Services CL API INTELX509V3PASSTHROUGHCREATEENCODEDNAME INTELX509V3PASSTHROUGHENCODENAME INTELX509V3PASSTHROUGHENCODEALGID INTELX509V3PASSTHROUGHREADCERTFROMFILE INTELX509V3PASSTHROUGHENCODEREVOKEDCERTLIST INTELX509V3PASSTHROUGHFINDSUPPORTINGCSP INTELX509V3PASSTHROUGHCSSMKEYTOSPKI Role of Add-In Modules in the Cdsa Framework Introduction to Add-in ModulesIntroduction to Add-in Modules Design Criteria for Add-In Modules Global Unique Identiﬁer GuidInitializer Code to Register Services with Cssm Add-In Module Install ProgramTo Install an Add-In Library How to Create a Cdsa Add-In Module for How to Create a Cdsa Add-In Module for HP-UXLd -b -o libmylib.1 +I MyAddInInit Implementing Integrity Checking in Add-In Modules Programming Self-Check Functions into the Initializer How to Create a Cdsa Add-In Module for HP-UX How to Create a Cdsa Add-In Module for HP-UX How to Create a Cdsa Add-In Module for HP-UX How to Create a Cdsa Add-In Module for HP-UX Typeprocedure How to Create a Cdsa Add-In Module for HP-UX Or specify the following for CL/TP/DL add-ins With a Cssm capable of integrity checking Certiﬁcate Chain Validating the CSP CredentialsCredential File Validating the CSP CredentialsValidation Sequence Verifying a Certiﬁcate ChainIntegrity Check prior to Loading Verifying the signature on the .SF ﬁleSHA-1 Self Check 11 Verifying the validity of the CSP libraryBilateral Authentication In-Memory vs. Static CheckingFurther References Concluding RemarksConcluding Remarks Concluding Remarks Sample Install Program Appendix aAppendix a Appendix a Cssmapimemoryfuncs Appendix a Else if argc != Destpath Sample Install Program Appendix a Sample Install Program Generating the Credential File Appendix BHP Signing Policy for CSP Add-In Vendors for Cdsa Version HP Signing Policy for CSP Add-In Vendors for Cdsa VersionSample Add-in Module Code Appendix CAppendix C Appendix C Sample Add-in Module Code Appendix C Cssmreturn = Null Sample Add-in Module Code == Cssmfail Cssmmodulefuncs Appendix C Sample Add-in Module Code Appendix C Sample Add-in Module Code Data 100 Appendix C 101 102 Appendix C 103 104 Functions Needed for Add-in Module Integrity Appendix D 105106 Trouble Shooting HP Cdsa Appendix E 107Cdsa API Errors Cdsa API Errors108 Appendix E 109 110 Appendix E 111 112 Appendix E 113 114 Appendix E 115 116 Appendix E 117 Cdsa Start Up Errors when calling CSSMModuleAttach Cdsa Start Up Errors when calling CSSMModuleAttach118 Appendix E 119 Debugging Core Dumps Using DDE to Debug Cdsa Applications120 Migrating to Cdsa Appendix F 121122 Appendix F 123 DL data structures 124ZIP format Appendix G 125126 Appendix G 127 128 Private Key File Appendix H 129Private Key File Contention 130

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