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-
- ENGINE
- ======
-
- With OpenSSL 0.9.6, a new component has been added to support external
- crypto devices, for example accelerator cards. The component is called
- ENGINE, and has still a pretty experimental status and almost no
- documentation. It's designed to be faily easily extensible by the
- calling programs.
-
- There's currently built-in support for the following crypto devices:
-
- o CryptoSwift
- o Compaq Atalla
- o nCipher CHIL
-
- A number of things are still needed and are being worked on:
-
- o An openssl utility command to handle or at least check available
- engines.
- o A better way of handling the methods that are handled by the
- engines.
- o Documentation!
-
- What already exists is fairly stable as far as it has been tested, but
- the test base has been a bit small most of the time.
-
- Because of this experimental status and what's lacking, the ENGINE
- component is not yet part of the default OpenSSL distribution. However,
- we have made a separate kit for those who want to try this out, to be
- found in the same places as the default OpenSSL distribution, but with
- "-engine-" being part of the kit file name. For example, version 0.9.6
- is distributed in the following two files:
-
- openssl-0.9.6.tar.gz
- openssl-engine-0.9.6.tar.gz
-
- NOTES
- =====
-
- openssl-engine-0.9.6.tar.gz does not depend on openssl-0.9.6.tar, you do
- not need to download both.
-
- openssl-engine-0.9.6.tar.gz is usable even if you don't have an external
- crypto device. The internal OpenSSL functions are contained in the
- engine "openssl", and will be used by default.
-
- No external crypto device is chosen unless you say so. You have actively
- tell the openssl utility commands to use it through a new command line
- switch called "-engine". And if you want to use the ENGINE library to
- do something similar, you must also explicitely choose an external crypto
- device, or the built-in crypto routines will be used, just as in the
- default OpenSSL distribution.
-
-
- PROBLEMS
- ========
-
- It seems like the ENGINE part doesn't work too well with Cryptoswift on
- Win32. A quick test done right before the release showed that trying
- "openssl speed -engine cswift" generated errors. If the DSO gets enabled,
- an attempt is made to write at memory address 0x00000002.
-