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d64b62998b
The context builds on CRYPTO_EX_DATA, allowing it to be dynamically extended with new data from the different parts of libcrypto. Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/8225)
111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*
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* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "internal/cryptlib.h"
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#include "internal/thread_once.h"
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struct openssl_ctx_st {
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CRYPTO_RWLOCK *lock;
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CRYPTO_EX_DATA data;
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};
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static OPENSSL_CTX default_context;
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static int context_init(OPENSSL_CTX *ctx)
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{
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return (ctx->lock = CRYPTO_THREAD_lock_new()) != NULL
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&& CRYPTO_new_ex_data(CRYPTO_EX_INDEX_OPENSSL_CTX, NULL,
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&ctx->data);
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}
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static int context_deinit(OPENSSL_CTX *ctx)
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{
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_OPENSSL_CTX, NULL, &ctx->data);
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CRYPTO_THREAD_lock_free(ctx->lock);
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return 1;
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}
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static CRYPTO_ONCE default_context_init = CRYPTO_ONCE_STATIC_INIT;
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static void do_default_context_deinit(void)
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{
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context_deinit(&default_context);
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}
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DEFINE_RUN_ONCE_STATIC(do_default_context_init)
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{
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return OPENSSL_init_crypto(0, NULL)
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&& context_init(&default_context)
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&& OPENSSL_atexit(do_default_context_deinit);
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}
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OPENSSL_CTX *OPENSSL_CTX_new(void)
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{
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OPENSSL_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
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if (ctx != NULL && !context_init(ctx)) {
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OPENSSL_CTX_free(ctx);
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ctx = NULL;
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}
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return ctx;
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}
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void OPENSSL_CTX_free(OPENSSL_CTX *ctx)
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{
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if (ctx != NULL)
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context_deinit(ctx);
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OPENSSL_free(ctx);
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}
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static void openssl_ctx_generic_new(void *parent_ign, void *ptr_ign,
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CRYPTO_EX_DATA *ad, int index,
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long argl_ign, void *argp)
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{
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const OPENSSL_CTX_METHOD *meth = argp;
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void *ptr = meth->new_func();
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if (ptr != NULL)
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CRYPTO_set_ex_data(ad, index, ptr);
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}
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static void openssl_ctx_generic_free(void *parent_ign, void *ptr,
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CRYPTO_EX_DATA *ad, int index,
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long argl_ign, void *argp)
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{
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const OPENSSL_CTX_METHOD *meth = argp;
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meth->free_func(ptr);
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}
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int openssl_ctx_new_index(const OPENSSL_CTX_METHOD *meth)
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{
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return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_OPENSSL_CTX, 0, (void *)meth,
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openssl_ctx_generic_new, NULL,
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openssl_ctx_generic_free);
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}
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void *openssl_ctx_get_data(OPENSSL_CTX *ctx, int index)
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{
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void *data = NULL;
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if (ctx == NULL) {
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if (!RUN_ONCE(&default_context_init, do_default_context_init))
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return 0;
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ctx = &default_context;
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}
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CRYPTO_THREAD_read_lock(ctx->lock);
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/* The alloc call ensures there's a value there */
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if (CRYPTO_alloc_ex_data(CRYPTO_EX_INDEX_OPENSSL_CTX, NULL,
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&ctx->data, index))
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data = CRYPTO_get_ex_data(&ctx->data, index);
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CRYPTO_THREAD_unlock(ctx->lock);
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return data;
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}
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