Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2014, Google Inc. |
| 2 | * |
| 3 | * Permission to use, copy, modify, and/or distribute this software for any |
| 4 | * purpose with or without fee is hereby granted, provided that the above |
| 5 | * copyright notice and this permission notice appear in all copies. |
| 6 | * |
| 7 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 8 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 9 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| 10 | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 11 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| 12 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| 13 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ |
| 14 | |
| 15 | #include <openssl/engine.h> |
| 16 | |
| 17 | #include <openssl/dh.h> |
| 18 | #include <openssl/dsa.h> |
| 19 | #include <openssl/ec_key.h> |
| 20 | #include <openssl/mem.h> |
| 21 | #include <openssl/rsa.h> |
| 22 | #include <openssl/thread.h> |
| 23 | |
| 24 | |
| 25 | struct engine_st { |
| 26 | DH_METHOD *dh_method; |
| 27 | DSA_METHOD *dsa_method; |
| 28 | RSA_METHOD *rsa_method; |
| 29 | ECDSA_METHOD *ecdsa_method; |
| 30 | }; |
| 31 | |
David Benjamin | c44d2f4 | 2014-08-20 16:24:00 -0400 | [diff] [blame] | 32 | ENGINE *ENGINE_new(void) { |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 33 | ENGINE *engine = OPENSSL_malloc(sizeof(ENGINE)); |
| 34 | if (engine == NULL) { |
| 35 | return NULL; |
| 36 | } |
| 37 | |
| 38 | memset(engine, 0, sizeof(ENGINE)); |
| 39 | return engine; |
| 40 | } |
| 41 | |
| 42 | void ENGINE_free(ENGINE *engine) { |
| 43 | if (engine->dh_method != NULL) { |
| 44 | METHOD_unref(engine->dh_method); |
| 45 | } |
| 46 | |
| 47 | OPENSSL_free(engine); |
| 48 | } |
| 49 | |
| 50 | /* set_method takes a pointer to a method and its given size and sets |
| 51 | * |*out_member| to point to a copy of it. The copy is |compiled_size| bytes |
| 52 | * long and has zero padding if needed. */ |
| 53 | static int set_method(void **out_member, const void *method, size_t method_size, |
| 54 | size_t compiled_size) { |
| 55 | void *copy = OPENSSL_malloc(compiled_size); |
| 56 | if (copy == NULL) { |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | memset(copy, 0, compiled_size); |
| 61 | |
| 62 | if (method_size > compiled_size) { |
| 63 | method_size = compiled_size; |
| 64 | } |
| 65 | memcpy(copy, method, method_size); |
| 66 | |
| 67 | METHOD_unref(*out_member); |
| 68 | *out_member = copy; |
| 69 | |
| 70 | return 1; |
| 71 | } |
| 72 | |
| 73 | int ENGINE_set_DH_method(ENGINE *engine, const DH_METHOD *method, |
| 74 | size_t method_size) { |
| 75 | return set_method((void **)&engine->dh_method, method, method_size, |
| 76 | sizeof(DH_METHOD)); |
| 77 | } |
| 78 | |
| 79 | DH_METHOD *ENGINE_get_DH_method(const ENGINE *engine) { |
| 80 | return engine->dh_method; |
| 81 | } |
| 82 | |
| 83 | int ENGINE_set_DSA_method(ENGINE *engine, const DSA_METHOD *method, |
| 84 | size_t method_size) { |
| 85 | return set_method((void **)&engine->dsa_method, method, method_size, |
| 86 | sizeof(DSA_METHOD)); |
| 87 | } |
| 88 | |
| 89 | DSA_METHOD *ENGINE_get_DSA_method(const ENGINE *engine) { |
| 90 | return engine->dsa_method; |
| 91 | } |
| 92 | |
| 93 | int ENGINE_set_RSA_method(ENGINE *engine, const RSA_METHOD *method, |
| 94 | size_t method_size) { |
| 95 | return set_method((void **)&engine->rsa_method, method, method_size, |
| 96 | sizeof(RSA_METHOD)); |
| 97 | } |
| 98 | |
| 99 | RSA_METHOD *ENGINE_get_RSA_method(const ENGINE *engine) { |
| 100 | return engine->rsa_method; |
| 101 | } |
| 102 | |
| 103 | int ENGINE_set_ECDSA_method(ENGINE *engine, const ECDSA_METHOD *method, |
| 104 | size_t method_size) { |
| 105 | return set_method((void **)&engine->ecdsa_method, method, method_size, |
| 106 | sizeof(ECDSA_METHOD)); |
| 107 | } |
| 108 | |
| 109 | ECDSA_METHOD *ENGINE_get_ECDSA_method(const ENGINE *engine) { |
| 110 | return engine->ecdsa_method; |
| 111 | } |
| 112 | |
| 113 | void METHOD_ref(void *method_in) { |
| 114 | struct openssl_method_common_st *method = method_in; |
| 115 | |
| 116 | if (method->is_static) { |
| 117 | return; |
| 118 | } |
| 119 | |
| 120 | CRYPTO_add(&method->references, 1, CRYPTO_LOCK_ENGINE); |
| 121 | } |
| 122 | |
| 123 | void METHOD_unref(void *method_in) { |
| 124 | struct openssl_method_common_st *method = method_in; |
| 125 | |
| 126 | if (method == NULL || method->is_static) { |
| 127 | return; |
| 128 | } |
| 129 | |
| 130 | if (CRYPTO_add(&method->references, -1, CRYPTO_LOCK_ENGINE) == 0) { |
| 131 | OPENSSL_free(method); |
| 132 | } |
| 133 | } |