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 <string.h>
18 #include <assert.h>
19
20 #include <openssl/ec_key.h>
21 #include <openssl/err.h>
22 #include <openssl/mem.h>
23 #include <openssl/rsa.h>
24 #include <openssl/thread.h>
25
26 #include "../internal.h"
27
28
29 struct engine_st {
30 RSA_METHOD *rsa_method;
31 ECDSA_METHOD *ecdsa_method;
32 };
33
ENGINE_new(void)34 ENGINE *ENGINE_new(void) {
35 ENGINE *engine = OPENSSL_malloc(sizeof(ENGINE));
36 if (engine == NULL) {
37 return NULL;
38 }
39
40 OPENSSL_memset(engine, 0, sizeof(ENGINE));
41 return engine;
42 }
43
ENGINE_free(ENGINE * engine)44 int ENGINE_free(ENGINE *engine) {
45 // Methods are currently required to be static so are not unref'ed.
46 OPENSSL_free(engine);
47 return 1;
48 }
49
50 // set_method takes a pointer to a method and its given size and sets
51 // |*out_member| to point to it. This function might want to be extended in the
52 // future to support making a copy of the method so that a stable ABI for
53 // ENGINEs can be supported. But, for the moment, all *_METHODS must be
54 // static.
set_method(void ** out_member,const void * method,size_t method_size,size_t compiled_size)55 static int set_method(void **out_member, const void *method, size_t method_size,
56 size_t compiled_size) {
57 const struct openssl_method_common_st *common = method;
58 if (method_size != compiled_size || !common->is_static) {
59 return 0;
60 }
61
62 *out_member = (void*) method;
63 return 1;
64 }
65
ENGINE_set_RSA_method(ENGINE * engine,const RSA_METHOD * method,size_t method_size)66 int ENGINE_set_RSA_method(ENGINE *engine, const RSA_METHOD *method,
67 size_t method_size) {
68 return set_method((void **)&engine->rsa_method, method, method_size,
69 sizeof(RSA_METHOD));
70 }
71
ENGINE_get_RSA_method(const ENGINE * engine)72 RSA_METHOD *ENGINE_get_RSA_method(const ENGINE *engine) {
73 return engine->rsa_method;
74 }
75
ENGINE_set_ECDSA_method(ENGINE * engine,const ECDSA_METHOD * method,size_t method_size)76 int ENGINE_set_ECDSA_method(ENGINE *engine, const ECDSA_METHOD *method,
77 size_t method_size) {
78 return set_method((void **)&engine->ecdsa_method, method, method_size,
79 sizeof(ECDSA_METHOD));
80 }
81
ENGINE_get_ECDSA_method(const ENGINE * engine)82 ECDSA_METHOD *ENGINE_get_ECDSA_method(const ENGINE *engine) {
83 return engine->ecdsa_method;
84 }
85
METHOD_ref(void * method_in)86 void METHOD_ref(void *method_in) {
87 assert(((struct openssl_method_common_st*) method_in)->is_static);
88 }
89
METHOD_unref(void * method_in)90 void METHOD_unref(void *method_in) {
91 struct openssl_method_common_st *method = method_in;
92
93 if (method == NULL) {
94 return;
95 }
96 assert(method->is_static);
97 }
98
99 OPENSSL_DECLARE_ERROR_REASON(ENGINE, OPERATION_NOT_SUPPORTED)
100