In message <[EMAIL PROTECTED]> on Wed, 25 Sep 2002 09:04:45 +0200,
Michiels Olivier <[EMAIL PROTECTED]> said:
olivier.michiels> I'm trying to uderstand how the engine object is
olivier.michiels> working with openssl-engine.
olivier.michiels> I'm using a NFast crypto device (chil) and when I
olivier.michiels> look into hw_ncipher.c I found three interristing
olivier.michiels> functions:
olivier.michiels>
olivier.michiels> static int hwcrhk_insert_card(const char *prompt_info,
olivier.michiels> const char *wrong_info,
olivier.michiels> HWCryptoHook_PassphraseContext *ppctx,
olivier.michiels> HWCryptoHook_CallerContext *cactx);
olivier.michiels> static int hwcrhk_get_pass(const char *prompt_info,
olivier.michiels> int *len_io, char *buf,
olivier.michiels> HWCryptoHook_PassphraseContext *ppctx,
olivier.michiels> HWCryptoHook_CallerContext *cactx);
olivier.michiels> static void hwcrhk_log_message(void *logstr, const char *message);
olivier.michiels>
olivier.michiels> How can I use them ? They are all static. I found
olivier.michiels> that they are in the HWCryptoHook_InitInfo
olivier.michiels> hwcrhk_globals structure but how can I have access
olivier.michiels> to this structure ?
Those functions are callbacks that are called by the hwcrhk library
when it needs to display certain messages or when it needs you to
insert a password. hwcrhk_insert_card() will display a message
telling you to insert some card (admin or operator),
hwcrhk_log_message() will display a log message and hwcrhk_get_pass()
will prompt you for a password.
You should not tamper directly with those functions. However, you can
provide password prompting callbacks with ENGINE_load_private_key()
and ENGINE_load_public_key(). You can also affect where logs go by
using ENGINE_ctrl(e, ENGINE_CTRL_SET_LOGSTREAM, 0, bio, NULL).
--
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