1 /* 2 * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include "eng_local.h" 11 #include <openssl/evp.h> 12 13 static ENGINE_TABLE *pkey_meth_table = NULL; 14 15 void ENGINE_unregister_pkey_meths(ENGINE *e) 16 { 17 engine_table_unregister(&pkey_meth_table, e); 18 } 19 20 static void engine_unregister_all_pkey_meths(void) 21 { 22 engine_table_cleanup(&pkey_meth_table); 23 } 24 25 int ENGINE_register_pkey_meths(ENGINE *e) 26 { 27 if (e->pkey_meths) { 28 const int *nids; 29 int num_nids = e->pkey_meths(e, NULL, &nids, 0); 30 if (num_nids > 0) 31 return engine_table_register(&pkey_meth_table, 32 engine_unregister_all_pkey_meths, e, 33 nids, num_nids, 0); 34 } 35 return 1; 36 } 37 38 void ENGINE_register_all_pkey_meths(void) 39 { 40 ENGINE *e; 41 42 for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) 43 ENGINE_register_pkey_meths(e); 44 } 45 46 int ENGINE_set_default_pkey_meths(ENGINE *e) 47 { 48 if (e->pkey_meths) { 49 const int *nids; 50 int num_nids = e->pkey_meths(e, NULL, &nids, 0); 51 if (num_nids > 0) 52 return engine_table_register(&pkey_meth_table, 53 engine_unregister_all_pkey_meths, e, 54 nids, num_nids, 1); 55 } 56 return 1; 57 } 58 59 /* 60 * Exposed API function to get a functional reference from the implementation 61 * table (ie. try to get a functional reference from the tabled structural 62 * references) for a given pkey_meth 'nid' 63 */ 64 ENGINE *ENGINE_get_pkey_meth_engine(int nid) 65 { 66 return engine_table_select(&pkey_meth_table, nid); 67 } 68 69 /* Obtains a pkey_meth implementation from an ENGINE functional reference */ 70 const EVP_PKEY_METHOD *ENGINE_get_pkey_meth(ENGINE *e, int nid) 71 { 72 EVP_PKEY_METHOD *ret; 73 ENGINE_PKEY_METHS_PTR fn = ENGINE_get_pkey_meths(e); 74 if (!fn || !fn(e, &ret, NULL, nid)) { 75 ENGINEerr(ENGINE_F_ENGINE_GET_PKEY_METH, 76 ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD); 77 return NULL; 78 } 79 return ret; 80 } 81 82 /* Gets the pkey_meth callback from an ENGINE structure */ 83 ENGINE_PKEY_METHS_PTR ENGINE_get_pkey_meths(const ENGINE *e) 84 { 85 return e->pkey_meths; 86 } 87 88 /* Sets the pkey_meth callback in an ENGINE structure */ 89 int ENGINE_set_pkey_meths(ENGINE *e, ENGINE_PKEY_METHS_PTR f) 90 { 91 e->pkey_meths = f; 92 return 1; 93 } 94 95 /* 96 * Internal function to free up EVP_PKEY_METHOD structures before an ENGINE 97 * is destroyed 98 */ 99 100 void engine_pkey_meths_free(ENGINE *e) 101 { 102 int i; 103 EVP_PKEY_METHOD *pkm; 104 if (e->pkey_meths) { 105 const int *pknids; 106 int npknids; 107 npknids = e->pkey_meths(e, NULL, &pknids, 0); 108 for (i = 0; i < npknids; i++) { 109 if (e->pkey_meths(e, &pkm, NULL, pknids[i])) { 110 EVP_PKEY_meth_free(pkm); 111 } 112 } 113 } 114 } 115