247 lines
7.3 KiB
C
247 lines
7.3 KiB
C
/* ====================================================================
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* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include "eng_int.h"
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#include "asn1_locl.h"
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#include <openssl/evp.h>
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/* If this symbol is defined then ENGINE_get_pkey_asn1_meth_engine(), the
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* function that is used by EVP to hook in pkey_asn1_meth code and cache
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* defaults (etc), will display brief debugging summaries to stderr with the
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* 'nid'. */
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/* #define ENGINE_PKEY_ASN1_METH_DEBUG */
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static ENGINE_TABLE *pkey_asn1_meth_table = NULL;
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void ENGINE_unregister_pkey_asn1_meths(ENGINE *e)
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{
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engine_table_unregister(&pkey_asn1_meth_table, e);
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}
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static void engine_unregister_all_pkey_asn1_meths(void)
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{
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engine_table_cleanup(&pkey_asn1_meth_table);
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}
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int ENGINE_register_pkey_asn1_meths(ENGINE *e)
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{
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if(e->pkey_asn1_meths)
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{
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const int *nids;
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int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0);
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if(num_nids > 0)
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return engine_table_register(&pkey_asn1_meth_table,
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engine_unregister_all_pkey_asn1_meths, e, nids,
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num_nids, 0);
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}
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return 1;
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}
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void ENGINE_register_all_pkey_asn1_meths(void)
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{
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ENGINE *e;
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for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
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ENGINE_register_pkey_asn1_meths(e);
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}
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int ENGINE_set_default_pkey_asn1_meths(ENGINE *e)
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{
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if(e->pkey_asn1_meths)
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{
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const int *nids;
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int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0);
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if(num_nids > 0)
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return engine_table_register(&pkey_asn1_meth_table,
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engine_unregister_all_pkey_asn1_meths, e, nids,
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num_nids, 1);
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}
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return 1;
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}
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/* Exposed API function to get a functional reference from the implementation
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* table (ie. try to get a functional reference from the tabled structural
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* references) for a given pkey_asn1_meth 'nid' */
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ENGINE *ENGINE_get_pkey_asn1_meth_engine(int nid)
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{
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return engine_table_select(&pkey_asn1_meth_table, nid);
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}
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/* Obtains a pkey_asn1_meth implementation from an ENGINE functional reference */
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const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth(ENGINE *e, int nid)
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{
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EVP_PKEY_ASN1_METHOD *ret;
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ENGINE_PKEY_ASN1_METHS_PTR fn = ENGINE_get_pkey_asn1_meths(e);
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if(!fn || !fn(e, &ret, NULL, nid))
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{
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ENGINEerr(ENGINE_F_ENGINE_GET_PKEY_ASN1_METH,
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ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD);
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return NULL;
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}
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return ret;
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}
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/* Gets the pkey_asn1_meth callback from an ENGINE structure */
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ENGINE_PKEY_ASN1_METHS_PTR ENGINE_get_pkey_asn1_meths(const ENGINE *e)
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{
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return e->pkey_asn1_meths;
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}
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/* Sets the pkey_asn1_meth callback in an ENGINE structure */
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int ENGINE_set_pkey_asn1_meths(ENGINE *e, ENGINE_PKEY_ASN1_METHS_PTR f)
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{
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e->pkey_asn1_meths = f;
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return 1;
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}
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/* Internal function to free up EVP_PKEY_ASN1_METHOD structures before an
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* ENGINE is destroyed
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*/
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void engine_pkey_asn1_meths_free(ENGINE *e)
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{
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int i;
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EVP_PKEY_ASN1_METHOD *pkm;
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if (e->pkey_asn1_meths)
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{
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const int *pknids;
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int npknids;
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npknids = e->pkey_asn1_meths(e, NULL, &pknids, 0);
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for (i = 0; i < npknids; i++)
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{
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if (e->pkey_asn1_meths(e, &pkm, NULL, pknids[i]))
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{
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EVP_PKEY_asn1_free(pkm);
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}
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}
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}
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}
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/* Find a method based on a string. This does a linear search through
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* all implemented algorithms. This is OK in practice because only
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* a small number of algorithms are likely to be implemented in an engine
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* and it is not used for speed critical operations.
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*/
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const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth_str(ENGINE *e,
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const char *str, int len)
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{
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int i, nidcount;
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const int *nids;
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EVP_PKEY_ASN1_METHOD *ameth;
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if (!e->pkey_asn1_meths)
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return NULL;
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if (len == -1)
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len = strlen(str);
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nidcount = e->pkey_asn1_meths(e, NULL, &nids, 0);
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for (i = 0; i < nidcount; i++)
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{
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e->pkey_asn1_meths(e, &ameth, NULL, nids[i]);
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if (((int)strlen(ameth->pem_str) == len) &&
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!strncasecmp(ameth->pem_str, str, len))
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return ameth;
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}
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return NULL;
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}
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typedef struct
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{
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ENGINE *e;
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const EVP_PKEY_ASN1_METHOD *ameth;
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const char *str;
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int len;
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} ENGINE_FIND_STR;
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static void look_str_cb(int nid, STACK_OF(ENGINE) *sk, ENGINE *def, void *arg)
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{
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ENGINE_FIND_STR *lk = arg;
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int i;
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if (lk->ameth)
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return;
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for (i = 0; i < sk_ENGINE_num(sk); i++)
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{
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ENGINE *e = sk_ENGINE_value(sk, i);
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EVP_PKEY_ASN1_METHOD *ameth;
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e->pkey_asn1_meths(e, &ameth, NULL, nid);
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if (((int)strlen(ameth->pem_str) == lk->len) &&
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!strncasecmp(ameth->pem_str, lk->str, lk->len))
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{
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lk->e = e;
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lk->ameth = ameth;
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return;
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}
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}
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}
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const EVP_PKEY_ASN1_METHOD *ENGINE_pkey_asn1_find_str(ENGINE **pe,
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const char *str, int len)
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{
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ENGINE_FIND_STR fstr;
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fstr.e = NULL;
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fstr.ameth = NULL;
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fstr.str = str;
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fstr.len = len;
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CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
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engine_table_doall(pkey_asn1_meth_table, look_str_cb, &fstr);
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/* If found obtain a structural reference to engine */
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if (fstr.e)
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{
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fstr.e->struct_ref++;
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engine_ref_debug(fstr.e, 0, 1)
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}
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*pe = fstr.e;
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CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
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return fstr.ameth;
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}
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