17cf2cb1d2
Most C standard library functions are undefined if passed NULL, even when the corresponding length is zero. This gives them (and, in turn, all functions which call them) surprising behavior on empty arrays. Some compilers will miscompile code due to this rule. See also https://www.imperialviolet.org/2016/06/26/nonnull.html Add OPENSSL_memcpy, etc., wrappers which avoid this problem. BUG=23 Change-Id: I95f42b23e92945af0e681264fffaf578e7f8465e Reviewed-on: https://boringssl-review.googlesource.com/12928 Commit-Queue: David Benjamin <davidben@google.com> Reviewed-by: Adam Langley <agl@google.com>
99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/* Copyright (c) 2014, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#include <openssl/engine.h>
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#include <string.h>
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#include <assert.h>
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#include <openssl/ec_key.h>
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#include <openssl/err.h>
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#include <openssl/mem.h>
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#include <openssl/rsa.h>
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#include <openssl/thread.h>
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#include "../internal.h"
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struct engine_st {
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RSA_METHOD *rsa_method;
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ECDSA_METHOD *ecdsa_method;
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};
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ENGINE *ENGINE_new(void) {
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ENGINE *engine = OPENSSL_malloc(sizeof(ENGINE));
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if (engine == NULL) {
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return NULL;
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}
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OPENSSL_memset(engine, 0, sizeof(ENGINE));
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return engine;
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}
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void ENGINE_free(ENGINE *engine) {
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/* Methods are currently required to be static so are not unref'ed. */
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OPENSSL_free(engine);
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}
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/* set_method takes a pointer to a method and its given size and sets
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* |*out_member| to point to it. This function might want to be extended in the
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* future to support making a copy of the method so that a stable ABI for
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* ENGINEs can be supported. But, for the moment, all *_METHODS must be
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* static. */
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static int set_method(void **out_member, const void *method, size_t method_size,
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size_t compiled_size) {
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const struct openssl_method_common_st *common = method;
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if (method_size != compiled_size || !common->is_static) {
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return 0;
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}
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*out_member = (void*) method;
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return 1;
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}
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int ENGINE_set_RSA_method(ENGINE *engine, const RSA_METHOD *method,
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size_t method_size) {
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return set_method((void **)&engine->rsa_method, method, method_size,
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sizeof(RSA_METHOD));
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}
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RSA_METHOD *ENGINE_get_RSA_method(const ENGINE *engine) {
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return engine->rsa_method;
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}
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int ENGINE_set_ECDSA_method(ENGINE *engine, const ECDSA_METHOD *method,
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size_t method_size) {
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return set_method((void **)&engine->ecdsa_method, method, method_size,
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sizeof(ECDSA_METHOD));
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}
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ECDSA_METHOD *ENGINE_get_ECDSA_method(const ENGINE *engine) {
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return engine->ecdsa_method;
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}
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void METHOD_ref(void *method_in) {
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assert(((struct openssl_method_common_st*) method_in)->is_static);
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}
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void METHOD_unref(void *method_in) {
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struct openssl_method_common_st *method = method_in;
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if (method == NULL) {
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return;
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}
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assert(method->is_static);
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}
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OPENSSL_DECLARE_ERROR_REASON(ENGINE, OPERATION_NOT_SUPPORTED)
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