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