1 /* 2 * Copyright 2001-2021 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 engine deprecated APIs */ 11 #define OPENSSL_SUPPRESS_DEPRECATED 12 13 #include "eng_local.h" 14 15 static ENGINE_TABLE *cipher_table = NULL; 16 17 void ENGINE_unregister_ciphers(ENGINE *e) 18 { 19 engine_table_unregister(&cipher_table, e); 20 } 21 22 static void engine_unregister_all_ciphers(void) 23 { 24 engine_table_cleanup(&cipher_table); 25 } 26 27 int ENGINE_register_ciphers(ENGINE *e) 28 { 29 if (e->ciphers) { 30 const int *nids; 31 int num_nids = e->ciphers(e, NULL, &nids, 0); 32 if (num_nids > 0) 33 return engine_table_register(&cipher_table, 34 engine_unregister_all_ciphers, e, 35 nids, num_nids, 0); 36 } 37 return 1; 38 } 39 40 void ENGINE_register_all_ciphers(void) 41 { 42 ENGINE *e; 43 44 for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) 45 ENGINE_register_ciphers(e); 46 } 47 48 int ENGINE_set_default_ciphers(ENGINE *e) 49 { 50 if (e->ciphers) { 51 const int *nids; 52 int num_nids = e->ciphers(e, NULL, &nids, 0); 53 if (num_nids > 0) 54 return engine_table_register(&cipher_table, 55 engine_unregister_all_ciphers, e, 56 nids, num_nids, 1); 57 } 58 return 1; 59 } 60 61 /* 62 * Exposed API function to get a functional reference from the implementation 63 * table (ie. try to get a functional reference from the tabled structural 64 * references) for a given cipher 'nid' 65 */ 66 ENGINE *ENGINE_get_cipher_engine(int nid) 67 { 68 return ossl_engine_table_select(&cipher_table, nid, 69 OPENSSL_FILE, OPENSSL_LINE); 70 } 71 72 /* Obtains a cipher implementation from an ENGINE functional reference */ 73 const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid) 74 { 75 const EVP_CIPHER *ret; 76 ENGINE_CIPHERS_PTR fn = ENGINE_get_ciphers(e); 77 if (!fn || !fn(e, &ret, NULL, nid)) { 78 ERR_raise(ERR_LIB_ENGINE, ENGINE_R_UNIMPLEMENTED_CIPHER); 79 return NULL; 80 } 81 return ret; 82 } 83 84 /* Gets the cipher callback from an ENGINE structure */ 85 ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e) 86 { 87 return e->ciphers; 88 } 89 90 /* Sets the cipher callback in an ENGINE structure */ 91 int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f) 92 { 93 e->ciphers = f; 94 return 1; 95 } 96