1 /* 2 * Copyright 2006-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (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 /* We need to use some deprecated APIs */ 11 #include "internal/deprecated.h" 12 13 #include "eng_local.h" 14 #include <openssl/evp.h> 15 16 static ENGINE_TABLE *pkey_meth_table = NULL; 17 18 void ENGINE_unregister_pkey_meths(ENGINE *e) 19 { 20 engine_table_unregister(&pkey_meth_table, e); 21 } 22 23 static void engine_unregister_all_pkey_meths(void) 24 { 25 engine_table_cleanup(&pkey_meth_table); 26 } 27 28 int ENGINE_register_pkey_meths(ENGINE *e) 29 { 30 if (e->pkey_meths) { 31 const int *nids; 32 int num_nids = e->pkey_meths(e, NULL, &nids, 0); 33 if (num_nids > 0) 34 return engine_table_register(&pkey_meth_table, 35 engine_unregister_all_pkey_meths, e, 36 nids, num_nids, 0); 37 } 38 return 1; 39 } 40 41 void ENGINE_register_all_pkey_meths(void) 42 { 43 ENGINE *e; 44 45 for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) 46 ENGINE_register_pkey_meths(e); 47 } 48 49 int ENGINE_set_default_pkey_meths(ENGINE *e) 50 { 51 if (e->pkey_meths) { 52 const int *nids; 53 int num_nids = e->pkey_meths(e, NULL, &nids, 0); 54 if (num_nids > 0) 55 return engine_table_register(&pkey_meth_table, 56 engine_unregister_all_pkey_meths, e, 57 nids, num_nids, 1); 58 } 59 return 1; 60 } 61 62 /* 63 * Exposed API function to get a functional reference from the implementation 64 * table (ie. try to get a functional reference from the tabled structural 65 * references) for a given pkey_meth 'nid' 66 */ 67 ENGINE *ENGINE_get_pkey_meth_engine(int nid) 68 { 69 return ossl_engine_table_select(&pkey_meth_table, nid, 70 OPENSSL_FILE, OPENSSL_LINE); 71 } 72 73 /* Obtains a pkey_meth implementation from an ENGINE functional reference */ 74 const EVP_PKEY_METHOD *ENGINE_get_pkey_meth(ENGINE *e, int nid) 75 { 76 EVP_PKEY_METHOD *ret; 77 ENGINE_PKEY_METHS_PTR fn = ENGINE_get_pkey_meths(e); 78 if (!fn || !fn(e, &ret, NULL, nid)) { 79 ERR_raise(ERR_LIB_ENGINE, ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD); 80 return NULL; 81 } 82 return ret; 83 } 84 85 /* Gets the pkey_meth callback from an ENGINE structure */ 86 ENGINE_PKEY_METHS_PTR ENGINE_get_pkey_meths(const ENGINE *e) 87 { 88 return e->pkey_meths; 89 } 90 91 /* Sets the pkey_meth callback in an ENGINE structure */ 92 int ENGINE_set_pkey_meths(ENGINE *e, ENGINE_PKEY_METHS_PTR f) 93 { 94 e->pkey_meths = f; 95 return 1; 96 } 97 98 /* 99 * Internal function to free up EVP_PKEY_METHOD structures before an ENGINE 100 * is destroyed 101 */ 102 103 void engine_pkey_meths_free(ENGINE *e) 104 { 105 int i; 106 EVP_PKEY_METHOD *pkm; 107 if (e->pkey_meths) { 108 const int *pknids; 109 int npknids; 110 npknids = e->pkey_meths(e, NULL, &pknids, 0); 111 for (i = 0; i < npknids; i++) { 112 if (e->pkey_meths(e, &pkm, NULL, pknids[i])) { 113 EVP_PKEY_meth_free(pkm); 114 } 115 } 116 } 117 } 118