Imported Upstream version 4.8.0.309

Former-commit-id: 5f9c6ae75f295e057a7d2971f3a6df4656fa8850

external/boringssl/crypto/crypto.c

@@ -0,0 +1,158 @@
+/* Copyright (c) 2014, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or 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. */
+
+#include <openssl/crypto.h>
+
+#include <openssl/cpu.h>
+
+#include "internal.h"
+
+
+#if !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_STATIC_ARMCAP) && \
+    (defined(OPENSSL_X86) || defined(OPENSSL_X86_64) || \
+     defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64))
+/* x86, x86_64 and the ARMs need to record the result of a cpuid call for the
+ * asm to work correctly, unless compiled without asm code. */
+#define NEED_CPUID
+
+#else
+
+/* Otherwise, don't emit a static initialiser. */
+
+#if !defined(BORINGSSL_NO_STATIC_INITIALIZER)
+#define BORINGSSL_NO_STATIC_INITIALIZER
+#endif
+
+#endif  /* !OPENSSL_NO_ASM && (OPENSSL_X86 || OPENSSL_X86_64 ||
+                               OPENSSL_ARM || OPENSSL_AARCH64) */
+
+
+/* The capability variables are defined in this file in order to work around a
+ * linker bug. When linking with a .a, if no symbols in a .o are referenced
+ * then the .o is discarded, even if it has constructor functions.
+ *
+ * This still means that any binaries that don't include some functionality
+ * that tests the capability values will still skip the constructor but, so
+ * far, the init constructor function only sets the capability variables. */
+
+#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
+/* This value must be explicitly initialised to zero in order to work around a
+ * bug in libtool or the linker on OS X.
+ *
+ * If not initialised then it becomes a "common symbol". When put into an
+ * archive, linking on OS X will fail to resolve common symbols. By
+ * initialising it to zero, it becomes a "data symbol", which isn't so
+ * affected. */
+uint32_t OPENSSL_ia32cap_P[4] = {0};
+#elif defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
+
+#include <openssl/arm_arch.h>
+
+#if defined(OPENSSL_STATIC_ARMCAP)
+
+uint32_t OPENSSL_armcap_P =
+#if defined(OPENSSL_STATIC_ARMCAP_NEON) || defined(__ARM_NEON__)
+    ARMV7_NEON |
+#endif
+#if defined(OPENSSL_STATIC_ARMCAP_AES)
+    ARMV8_AES |
+#endif
+#if defined(OPENSSL_STATIC_ARMCAP_SHA1)
+    ARMV8_SHA1 |
+#endif
+#if defined(OPENSSL_STATIC_ARMCAP_SHA256)
+    ARMV8_SHA256 |
+#endif
+#if defined(OPENSSL_STATIC_ARMCAP_PMULL)
+    ARMV8_PMULL |
+#endif
+    0;
+
+#else
+uint32_t OPENSSL_armcap_P = 0;
+#endif
+
+#endif
+
+
+#if defined(OPENSSL_WINDOWS) && !defined(BORINGSSL_NO_STATIC_INITIALIZER)
+#define OPENSSL_CDECL __cdecl
+#else
+#define OPENSSL_CDECL
+#endif
+
+#if defined(BORINGSSL_NO_STATIC_INITIALIZER)
+static CRYPTO_once_t once = CRYPTO_ONCE_INIT;
+#elif defined(OPENSSL_WINDOWS)
+#pragma section(".CRT$XCU", read)
+static void __cdecl do_library_init(void);
+__declspec(allocate(".CRT$XCU")) void(*library_init_constructor)(void) =
+    do_library_init;
+#else
+static void do_library_init(void) __attribute__ ((constructor));
+#endif
+
+/* do_library_init is the actual initialization function. If
+ * BORINGSSL_NO_STATIC_INITIALIZER isn't defined, this is set as a static
+ * initializer. Otherwise, it is called by CRYPTO_library_init. */
+static void OPENSSL_CDECL do_library_init(void) {
+ /* WARNING: this function may only configure the capability variables. See the
+  * note above about the linker bug. */
+#if defined(NEED_CPUID)
+  OPENSSL_cpuid_setup();
+#endif
+}
+
+void CRYPTO_library_init(void) {
+  /* TODO(davidben): It would be tidier if this build knob could be replaced
+   * with an internal lazy-init mechanism that would handle things correctly
+   * in-library. https://crbug.com/542879 */
+#if defined(BORINGSSL_NO_STATIC_INITIALIZER)
+  CRYPTO_once(&once, do_library_init);
+#endif
+}
+
+int CRYPTO_is_confidential_build(void) {
+#if defined(BORINGSSL_CONFIDENTIAL)
+  return 1;
+#else
+  return 0;
+#endif
+}
+
+int CRYPTO_has_asm(void) {
+#if defined(OPENSSL_NO_ASM)
+  return 0;
+#else
+  return 1;
+#endif
+}
+
+const char *SSLeay_version(int unused) {
+  return "BoringSSL";
+}
+
+unsigned long SSLeay(void) {
+  return OPENSSL_VERSION_NUMBER;
+}
+
+int CRYPTO_malloc_init(void) {
+  return 1;
+}
+
+void ENGINE_load_builtin_engines(void) {}
+
+void OPENSSL_load_builtin_modules(void) {}
+
+int FIPS_mode(void) { return 0; }