tb_rsa.c

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/* ====================================================================
 * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *    distribution.
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 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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 *
 * This product includes cryptographic software written by Eric Young
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]).
 *
 */

#include "eng_int.h"

/* If this symbol is defined then ENGINE_get_default_RSA(), the function that is
 * used by RSA to hook in implementation code and cache defaults (etc), will
 * display brief debugging summaries to stderr with the 'nid'. */
/* #define ENGINE_RSA_DEBUG */

static ENGINE_TABLE *rsa_table = NULL;
static const int dummy_nid = 1;

void ENGINE_unregister_RSA(ENGINE *e)
    {
    engine_table_unregister(&rsa_table, e);
    }

static void engine_unregister_all_RSA(void)
    {
    engine_table_cleanup(&rsa_table);
    }

int ENGINE_register_RSA(ENGINE *e)
    {
    if(e->rsa_meth)
        return engine_table_register(&rsa_table,
                engine_unregister_all_RSA, e, &dummy_nid, 1, 0);
    return 1;
    }

void ENGINE_register_all_RSA()
    {
    ENGINE *e;

    for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
        ENGINE_register_RSA(e);
    }

int ENGINE_set_default_RSA(ENGINE *e)
    {
    if(e->rsa_meth)
        return engine_table_register(&rsa_table,
                engine_unregister_all_RSA, e, &dummy_nid, 1, 1);
    return 1;
    }

/* Exposed API function to get a functional reference from the implementation
 * table (ie. try to get a functional reference from the tabled structural
 * references). */
ENGINE *ENGINE_get_default_RSA(void)
    {
    return engine_table_select(&rsa_table, dummy_nid);
    }

/* Obtains an RSA implementation from an ENGINE functional reference */
const RSA_METHOD *ENGINE_get_RSA(const ENGINE *e)
    {
    return e->rsa_meth;
    }

/* Sets an RSA implementation in an ENGINE structure */
int ENGINE_set_RSA(ENGINE *e, const RSA_METHOD *rsa_meth)
    {
    e->rsa_meth = rsa_meth;
    return 1;
    }