early-access version 1255

externals/libressl/crypto/crypto_init.c

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+/*
+ * Copyright (c) 2018 Bob Beck <beck@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* OpenSSL style init */
+
+#include <pthread.h>
+#include <stdio.h>
+
+#include <openssl/objects.h>
+#include <openssl/conf.h>
+#include <openssl/evp.h>
+#include <openssl/err.h>
+
+#include "cryptlib.h"
+
+int OpenSSL_config(const char *);
+int OpenSSL_no_config(void);
+
+static pthread_t crypto_init_thread;
+
+static void
+OPENSSL_init_crypto_internal(void)
+{
+	crypto_init_thread = pthread_self();
+
+	OPENSSL_cpuid_setup();
+	ERR_load_crypto_strings();
+	OpenSSL_add_all_ciphers();
+	OpenSSL_add_all_digests();
+}
+
+int
+OPENSSL_init_crypto(uint64_t opts, const void *settings)
+{
+	static pthread_once_t once = PTHREAD_ONCE_INIT;
+
+	if (pthread_equal(pthread_self(), crypto_init_thread))
+		return 1; /* don't recurse */
+
+	if (pthread_once(&once, OPENSSL_init_crypto_internal) != 0)
+		return 0;
+
+	if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG) &&
+	    (OpenSSL_no_config() == 0))
+		return 0;
+
+	if ((opts & OPENSSL_INIT_LOAD_CONFIG) &&
+	    (OpenSSL_config(NULL) == 0))
+		return 0;
+
+	return 1;
+}