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®
RSA BSAFE
Crypto-C
Cryptographic Components for C
Developer’s Guide
Version 5.2.2
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RSA Security Inc. RSA Security Ireland Limited 20 Crosby Drive Bay 127, Shannon Free Zone Bedford, MA 01730 USA Shannon, County Clare, Ireland Tel (US) 1 877 RSA 4900, +1 781 301 5000 Tel +353 61 72 5100 Fax +1 781 301 5170 Fax +353 61 72 5110 www.rsasecurity.com www.rsasecurity.ie See our Web Site for regional Customer Service telephone and fax numbers. Trademarks ACE/Server, BSAFE, Genuine RSA Encryption Engine, Keon, RC2, RC4, RC5, RSA, RSA SecurPC, SecurCare, SecurID, SoftID, and WebID are
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Contents Preface xv What’s New in Version 5.2.2? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi Improved performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xvi Hardware support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xvi MultiPrime RSA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Cryptographic Standards and Crypto-C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 PKCS Standards and Crypto-C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 NIST Standards and Crypto-C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 PKCS Compared with NIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ANSI X9 Standards and
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Optimal Asymmetric Encryption Padding (OAEP) . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Authentication and Digital Signatures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Digital Signature Algorithm (DSA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60 Digital Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Diffie-Hellman Public Key Agreement . . . . . . . .
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Elliptic Curve Algorithms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 Interoperability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Elliptic Curve Standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Security Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Handling
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Memory-Management Routines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122 Memory-Management Routines and Standard C Libraries . . . . . . . . . . . . . . . . . .122 Memory Allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123 Binary Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123 BER/DER Encoding. . . . . . . . . . . . . . . . .
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Chapter 6 Symmetric-Key Operations 177 Block Ciphers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 DES with CBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 Decrypting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 The RC2 Cipher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Performing Diffie-Hellman Key Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249 Generating Diffie-Hellman Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .249 Distributing Diffie-Hellman Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .253 Crypto-C Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .253 BER Format . . . . . . . . . . . . . . .
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Appendix A Command-Line Demos 327 Overview of the Demos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327 Command-Line Demo User’s Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328 BDEMO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328 Starting BDEMO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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List of Figures Figure 3-1 Symmetric-Key Encryption and Decryption . . . . . . . . . . . . . . . . . . . . 36 Figure 3-2 Triple DES Encryption as Implemented in Crypto-C. . . . . . . . . . . . . . 38 Figure 3-3 Electronic Codebook (ECB) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Figure 3-4 Cipher-Block Chaining (CBC) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Figure 3-5 Cipher Feedback (CFB) Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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xii RSA BSAFE Crypto-C Developer ’s Guide
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List of Tables 27 Table 3-1 Calculation of 8 mod 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Table 3-2 Elliptic Curve Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Table 3-3 DES Weak and Semi-Weak Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 Table 3-4 Summary of Recommended Key Sizes . . . . . . . . . . . . . . . . . . . . . . . 98 Table 4-1 Message Digests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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xiv RSA BSAFE Crypto-C Developer ’s Guide
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Preface Dear Crypto-C Developer: Congratulations on your purchase of RSA BSAFE® Crypto-C (Crypto-C), the state-of- the-art in cryptographic software toolkits. Crypto-C provides developers with the most important privacy, authentication, and data integrity routines. Crypto-C contains a full palette of popular cryptographic algorithms. This software development kit enables you to develop applications for a wide range of purposes, including electronic commerce, home banking, Webcasting, and e
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What’s New in Version 5.2.2? What’s New in Version 5.2.2? Following is a list of RSA BSAFE Crypto-C features that are new in version 5.2.2: Improved performance With the new performance improvements, you’ll be able to use RSA BSAFE Crypto- C’s algorithms at unprecedented levels of speed and throughput across a wide range of hardware platforms. RSA BSAFE Crypto-C’s support for the Intel Itanium™ and Pentium™4 processors will allow developers the ability to take advantage of benefits of these p
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Organization of This Manual V5.2. Use this AI to save the internal state of an RC4 encryption or decryption object, or to create a new object from the saved state of a previous RC4 object. Advanced Encryption Standard (AES) Crypto-C includes basic AES support for the cutting edge in processor technology: Intel Itanium and Pentium 4. Organization of This Manual This manual is organized as follows: Chapter 1, “Introduction,” introduces the Crypto-C toolkit. It lists the algorithms, cryptograp
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Conventions Used in This Manual Conventions Used in This Manual The following typographical conventions are used in this manual. Italic is used for: new terms where they are introduced the names of manuals and books Lucida Typewriter Sans is used for: anything that appears literally in a C program, such as the names of structures and functions supplied by Crypto-C: for example, B_DecodeInit Lucida Typewriter Sans Italic is used for: function parameters and placeholders that indicate tha
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Terms and Abbreviations Terms and Abbreviations The following table lists terms and abbreviations used in this document. Refer to the Glossary for a list of security and cryptographic terms and abbreviations, along with their definitions, that are used throughout the RSA BSAFE Crypto-C documentation set. Term or Abbreviation Definition Crypto-C RSA BSAFE Crypto-C: Cryptographic software development kit developers use to develop secure applications. .doc (file) Word for Windows, version 6.x
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Related Documents Related Documents Following is a list of documents referenced in this book and suggested material for further reading. 1. The Public-Key Cryptography Standards (PKCS), RSA Laboratories. (http://www.rsasecurity.com/rsalabs/PKCS/) 2. Frequently Asked Questions (FAQ) About Today’s Cryptography, RSA Laboratories. (http://www.rsasecurity.com/rsalabs/faq/) 3. The following Internet Standard documents: RFCs 1421, 1422, 1423, 1424 on Privacy Enhancement for Internet Electronic Ma
