RFC 2628 (rfc2628) - Page 1 of 30

Simple Cryptographic Program Interface (Crypto API)

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Network Working Group                                         V. Smyslov
Request for Comments: 2628                                           TWS
Category: Informational                                        June 1999


          Simple Cryptographic Program Interface (Crypto API)

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (1999).  All Rights Reserved.

Abstract

   This document describes a simple Application Program Interface to
   cryptographic functions. The main purpose of such an interface is to
   separate cryptographic libraries from internet applications, thus
   allowing an independent development of both. It can be used in
   various internet applications such as [IPsec], [ISAKMP], [IKE],
   [TLS].

Table of Contents

   1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . .  2
   1.1. Summary . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
   1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . .  2
   1.3. Objectives of Development . . . . . . . . . . . . . . . . . .  3
   2. Cryptoplugin Structure. . . . . . . . . . . . . . . . . . . . .  3
   3. Program Interface . . . . . . . . . . . . . . . . . . . . . . .  4
   3.1. Cryptoplugin Initialization Function. . . . . . . . . . . . .  4
   3.1.1. Description of CryptoPluginInfo structure . . . . . . . . .  6
   3.1.2. Description of CryptoAlgInfo structure. . . . . . . . . . .  6
   3.2. Cryptoplugin Deinitialization Function. . . . . . . . . . . .  9
   3.3. Cryptographic Context Opening Function. . . . . . . . . . . . 10
   3.4. Cryptographic Context Reopening Function. . . . . . . . . . . 11
   3.5. Cryptographic Context Closing Function. . . . . . . . . . . . 12
   3.6. Key Verification Function . . . . . . . . . . . . . . . . . . 12
   3.7. Data Transformation Function. . . . . . . . . . . . . . . . . 13
   3.7.1. For CRYPTO_TYPE_ENCRYPT Algorithm Type. . . . . . . . . . . 13
   3.7.2. For CRYPTO_TYPE_DECRYPT Algorithm Type. . . . . . . . . . . 14
   3.7.3. For CRYPTO_TYPE_SIGN Algorithm Type . . . . . . . . . . . . 15
   3.7.4. For CRYPTO_TYPE_VERIFY Algorithm Type . . . . . . . . . . . 17
   3.7.5. For CRYPTO_TYPE_COMPRESS Algorithm Type . . . . . . . . . . 18



Smyslov                      Informational
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