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246 lines
8.0 KiB
246 lines
8.0 KiB
/* ==================================================================== |
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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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/* |
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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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*/ |
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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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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, |
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e, nids, 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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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, |
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e, nids, num_nids, 1); |
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} |
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return 1; |
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} |
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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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*/ |
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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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/* |
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* Obtains a pkey_asn1_meth implementation from an ENGINE functional |
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* reference |
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*/ |
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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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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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/* |
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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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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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if (e->pkey_asn1_meths(e, &pkm, NULL, pknids[i])) { |
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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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/* |
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* Find a method based on a string. This does a linear search through all |
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* implemented algorithms. This is OK in practice because only a small number |
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* of algorithms are likely to be implemented in an engine and it is not used |
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* 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, |
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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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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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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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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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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, |
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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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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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