8e79f2ee9c
Based on Nekogram. Key additions: - Rebrand to FoxiGram (app name, APK name, applicationId com.foxigram.app) - Embedded Xray (VLESS+Reality) proxy client via JNI libxray.so - Bundled hidden one-tap proxies (LTE + WiFi), read-only in UI - Auto-restore proxy on restart, rebind to active network (LTE/WiFi) - Server credentials externalized to git-ignored XrayServers.java (+ template) - libxray Go source included; compiled .so, keystore, google-services.json ignored
1573 lines
52 KiB
C++
1573 lines
52 KiB
C++
// Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
|
||
//
|
||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
// you may not use this file except in compliance with the License.
|
||
// You may obtain a copy of the License at
|
||
//
|
||
// https://www.apache.org/licenses/LICENSE-2.0
|
||
//
|
||
// Unless required by applicable law or agreed to in writing, software
|
||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
// See the License for the specific language governing permissions and
|
||
// limitations under the License.
|
||
|
||
#ifndef OPENSSL_HEADER_CRYPTO_INTERNAL_H
|
||
#define OPENSSL_HEADER_CRYPTO_INTERNAL_H
|
||
|
||
#include <openssl/crypto.h>
|
||
#include <openssl/ex_data.h>
|
||
#include <openssl/stack.h>
|
||
#include <openssl/thread.h>
|
||
|
||
#include <assert.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
|
||
#if defined(BORINGSSL_CONSTANT_TIME_VALIDATION)
|
||
#include <valgrind/memcheck.h>
|
||
#endif
|
||
|
||
#if defined(BORINGSSL_FIPS_BREAK_TESTS)
|
||
#include <stdlib.h>
|
||
#endif
|
||
|
||
#if defined(OPENSSL_THREADS) && \
|
||
(!defined(OPENSSL_WINDOWS) || defined(__MINGW32__))
|
||
#include <pthread.h>
|
||
#define OPENSSL_PTHREADS
|
||
#endif
|
||
|
||
#if defined(OPENSSL_THREADS) && !defined(OPENSSL_PTHREADS) && \
|
||
defined(OPENSSL_WINDOWS)
|
||
#define OPENSSL_WINDOWS_THREADS
|
||
#endif
|
||
|
||
#if defined(OPENSSL_THREADS)
|
||
#include <atomic>
|
||
#endif
|
||
|
||
#if defined(OPENSSL_WINDOWS_THREADS)
|
||
#include <windows.h>
|
||
#endif
|
||
|
||
#if defined(__cplusplus)
|
||
extern "C" {
|
||
#endif
|
||
|
||
|
||
#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/getauxval call
|
||
// for the asm to work correctly, unless compiled without asm code.
|
||
#define NEED_CPUID
|
||
|
||
// OPENSSL_cpuid_setup initializes the platform-specific feature cache. This
|
||
// function should not be called directly. Call |OPENSSL_init_cpuid| instead.
|
||
void OPENSSL_cpuid_setup(void);
|
||
|
||
// OPENSSL_init_cpuid initializes the platform-specific feature cache, if
|
||
// needed. This function is idempotent and may be called concurrently.
|
||
void OPENSSL_init_cpuid(void);
|
||
#else
|
||
inline void OPENSSL_init_cpuid(void) {}
|
||
#endif
|
||
|
||
#if (defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)) && \
|
||
!defined(OPENSSL_STATIC_ARMCAP)
|
||
// OPENSSL_get_armcap_pointer_for_test returns a pointer to |OPENSSL_armcap_P|
|
||
// for unit tests. Any modifications to the value must be made before any other
|
||
// function call in BoringSSL.
|
||
OPENSSL_EXPORT uint32_t *OPENSSL_get_armcap_pointer_for_test(void);
|
||
#endif
|
||
|
||
|
||
// On non-MSVC 64-bit targets, we expect __uint128_t support. This includes
|
||
// clang-cl, which defines both __clang__ and _MSC_VER.
|
||
#if (!defined(_MSC_VER) || defined(__clang__)) && defined(OPENSSL_64_BIT)
|
||
#define BORINGSSL_HAS_UINT128
|
||
typedef __int128_t int128_t;
|
||
typedef __uint128_t uint128_t;
|
||
|
||
// __uint128_t division depends on intrinsics in the compiler runtime. Those
|
||
// intrinsics are missing in clang-cl (https://crbug.com/787617) and nanolibc.
|
||
// These may be bugs in the toolchain definition, but just disable it for now.
|
||
// EDK2's toolchain is missing __udivti3 (b/339380897) so cannot support
|
||
// 128-bit division currently.
|
||
#if !defined(_MSC_VER) && !defined(OPENSSL_NANOLIBC) && \
|
||
!defined(__EDK2_BORINGSSL__)
|
||
#define BORINGSSL_CAN_DIVIDE_UINT128
|
||
#endif
|
||
#endif
|
||
|
||
#define OPENSSL_ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
|
||
|
||
#if defined(__clang__) && __clang_major__ >= 5
|
||
#if __has_attribute(fallthrough)
|
||
#define OPENSSL_CAN_USE_ATTR_FALLTHROUGH
|
||
#endif
|
||
#endif
|
||
|
||
// GCC-like compilers indicate SSE2 with |__SSE2__|. MSVC leaves the caller to
|
||
// know that x86_64 has SSE2, and uses _M_IX86_FP to indicate SSE2 on x86.
|
||
// https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=msvc-170
|
||
#if defined(__SSE2__) || defined(_M_AMD64) || defined(_M_X64) || \
|
||
(defined(_M_IX86_FP) && _M_IX86_FP >= 2)
|
||
#define OPENSSL_SSE2
|
||
#endif
|
||
|
||
#if defined(OPENSSL_X86) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_SSE2)
|
||
#error \
|
||
"x86 assembly requires SSE2. Build with -msse2 (recommended), or disable assembly optimizations with -DOPENSSL_NO_ASM."
|
||
#endif
|
||
|
||
// For convenience in testing the fallback code, we allow disabling SSE2
|
||
// intrinsics via |OPENSSL_NO_SSE2_FOR_TESTING|. We require SSE2 on x86 and
|
||
// x86_64, so we would otherwise need to test such code on a non-x86 platform.
|
||
//
|
||
// This does not remove the above requirement for SSE2 support with assembly
|
||
// optimizations. It only disables some intrinsics-based optimizations so that
|
||
// we can test the fallback code on CI.
|
||
#if defined(OPENSSL_SSE2) && defined(OPENSSL_NO_SSE2_FOR_TESTING)
|
||
#undef OPENSSL_SSE2
|
||
#endif
|
||
|
||
#if defined(__GNUC__) || defined(__clang__)
|
||
#define OPENSSL_ATTR_CONST __attribute__((const))
|
||
#else
|
||
#define OPENSSL_ATTR_CONST
|
||
#endif
|
||
|
||
#if defined(BORINGSSL_MALLOC_FAILURE_TESTING)
|
||
// OPENSSL_reset_malloc_counter_for_testing, when malloc testing is enabled,
|
||
// resets the internal malloc counter, to simulate further malloc failures. This
|
||
// should be called in between independent tests, at a point where failure from
|
||
// a previous test will not impact subsequent ones.
|
||
OPENSSL_EXPORT void OPENSSL_reset_malloc_counter_for_testing(void);
|
||
|
||
// OPENSSL_disable_malloc_failures_for_testing, when malloc testing is enabled,
|
||
// disables simulated malloc failures. Calls to |OPENSSL_malloc| will not
|
||
// increment the malloc counter or synthesize failures. This may be used to skip
|
||
// simulating malloc failures in some region of code.
|
||
OPENSSL_EXPORT void OPENSSL_disable_malloc_failures_for_testing(void);
|
||
|
||
// OPENSSL_enable_malloc_failures_for_testing, when malloc testing is enabled,
|
||
// re-enables simulated malloc failures.
|
||
OPENSSL_EXPORT void OPENSSL_enable_malloc_failures_for_testing(void);
|
||
#else
|
||
inline void OPENSSL_reset_malloc_counter_for_testing(void) {}
|
||
inline void OPENSSL_disable_malloc_failures_for_testing(void) {}
|
||
inline void OPENSSL_enable_malloc_failures_for_testing(void) {}
|
||
#endif
|
||
|
||
#if defined(__has_builtin)
|
||
#define OPENSSL_HAS_BUILTIN(x) __has_builtin(x)
|
||
#else
|
||
#define OPENSSL_HAS_BUILTIN(x) 0
|
||
#endif
|
||
|
||
|
||
// Pointer utility functions.
|
||
|
||
// buffers_alias returns one if |a| and |b| alias and zero otherwise.
|
||
static inline int buffers_alias(const void *a, size_t a_bytes, const void *b,
|
||
size_t b_bytes) {
|
||
// Cast |a| and |b| to integers. In C, pointer comparisons between unrelated
|
||
// objects are undefined whereas pointer to integer conversions are merely
|
||
// implementation-defined. We assume the implementation defined it in a sane
|
||
// way.
|
||
uintptr_t a_u = (uintptr_t)a;
|
||
uintptr_t b_u = (uintptr_t)b;
|
||
return a_u + a_bytes > b_u && b_u + b_bytes > a_u;
|
||
}
|
||
|
||
// align_pointer returns |ptr|, advanced to |alignment|. |alignment| must be a
|
||
// power of two, and |ptr| must have at least |alignment - 1| bytes of scratch
|
||
// space.
|
||
static inline void *align_pointer(void *ptr, size_t alignment) {
|
||
// |alignment| must be a power of two.
|
||
assert(alignment != 0 && (alignment & (alignment - 1)) == 0);
|
||
// Instead of aligning |ptr| as a |uintptr_t| and casting back, compute the
|
||
// offset and advance in pointer space. C guarantees that casting from pointer
|
||
// to |uintptr_t| and back gives the same pointer, but general
|
||
// integer-to-pointer conversions are implementation-defined. GCC does define
|
||
// it in the useful way, but this makes fewer assumptions.
|
||
uintptr_t offset = (0u - (uintptr_t)ptr) & (alignment - 1);
|
||
ptr = (char *)ptr + offset;
|
||
assert(((uintptr_t)ptr & (alignment - 1)) == 0);
|
||
return ptr;
|
||
}
|
||
|
||
|
||
// Constant-time utility functions.
|
||
//
|
||
// The following methods return a bitmask of all ones (0xff...f) for true and 0
|
||
// for false. This is useful for choosing a value based on the result of a
|
||
// conditional in constant time. For example,
|
||
//
|
||
// if (a < b) {
|
||
// c = a;
|
||
// } else {
|
||
// c = b;
|
||
// }
|
||
//
|
||
// can be written as
|
||
//
|
||
// crypto_word_t lt = constant_time_lt_w(a, b);
|
||
// c = constant_time_select_w(lt, a, b);
|
||
|
||
// crypto_word_t is the type that most constant-time functions use. Ideally we
|
||
// would like it to be |size_t|, but NaCl builds in 64-bit mode with 32-bit
|
||
// pointers, which means that |size_t| can be 32 bits when |BN_ULONG| is 64
|
||
// bits. Since we want to be able to do constant-time operations on a
|
||
// |BN_ULONG|, |crypto_word_t| is defined as an unsigned value with the native
|
||
// word length.
|
||
#if defined(OPENSSL_64_BIT)
|
||
typedef uint64_t crypto_word_t;
|
||
#elif defined(OPENSSL_32_BIT)
|
||
typedef uint32_t crypto_word_t;
|
||
#else
|
||
#error "Must define either OPENSSL_32_BIT or OPENSSL_64_BIT"
|
||
#endif
|
||
|
||
#define CONSTTIME_TRUE_W ~((crypto_word_t)0)
|
||
#define CONSTTIME_FALSE_W ((crypto_word_t)0)
|
||
#define CONSTTIME_TRUE_8 ((uint8_t)0xff)
|
||
#define CONSTTIME_FALSE_8 ((uint8_t)0)
|
||
|
||
// value_barrier_w returns |a|, but prevents GCC and Clang from reasoning about
|
||
// the returned value. This is used to mitigate compilers undoing constant-time
|
||
// code, until we can express our requirements directly in the language.
|
||
//
|
||
// Note the compiler is aware that |value_barrier_w| has no side effects and
|
||
// always has the same output for a given input. This allows it to eliminate
|
||
// dead code, move computations across loops, and vectorize.
|
||
static inline crypto_word_t value_barrier_w(crypto_word_t a) {
|
||
#if defined(__GNUC__) || defined(__clang__)
|
||
__asm__("" : "+r"(a) : /* no inputs */);
|
||
#endif
|
||
return a;
|
||
}
|
||
|
||
// value_barrier_u32 behaves like |value_barrier_w| but takes a |uint32_t|.
|
||
static inline uint32_t value_barrier_u32(uint32_t a) {
|
||
#if defined(__GNUC__) || defined(__clang__)
|
||
__asm__("" : "+r"(a) : /* no inputs */);
|
||
#endif
|
||
return a;
|
||
}
|
||
|
||
// value_barrier_u64 behaves like |value_barrier_w| but takes a |uint64_t|.
|
||
static inline uint64_t value_barrier_u64(uint64_t a) {
|
||
#if defined(__GNUC__) || defined(__clang__)
|
||
__asm__("" : "+r"(a) : /* no inputs */);
|
||
#endif
|
||
return a;
|
||
}
|
||
|
||
// |value_barrier_u8| could be defined as above, but compilers other than
|
||
// clang seem to still materialize 0x00..00MM instead of reusing 0x??..??MM.
|
||
|
||
// constant_time_msb_w returns the given value with the MSB copied to all the
|
||
// other bits.
|
||
static inline crypto_word_t constant_time_msb_w(crypto_word_t a) {
|
||
return 0u - (a >> (sizeof(a) * 8 - 1));
|
||
}
|
||
|
||
// constant_time_lt_w returns 0xff..f if a < b and 0 otherwise.
|
||
static inline crypto_word_t constant_time_lt_w(crypto_word_t a,
|
||
crypto_word_t b) {
|
||
// Consider the two cases of the problem:
|
||
// msb(a) == msb(b): a < b iff the MSB of a - b is set.
|
||
// msb(a) != msb(b): a < b iff the MSB of b is set.
|
||
//
|
||
// If msb(a) == msb(b) then the following evaluates as:
|
||
// msb(a^((a^b)|((a-b)^a))) ==
|
||
// msb(a^((a-b) ^ a)) == (because msb(a^b) == 0)
|
||
// msb(a^a^(a-b)) == (rearranging)
|
||
// msb(a-b) (because ∀x. x^x == 0)
|
||
//
|
||
// Else, if msb(a) != msb(b) then the following evaluates as:
|
||
// msb(a^((a^b)|((a-b)^a))) ==
|
||
// msb(a^(𝟙 | ((a-b)^a))) == (because msb(a^b) == 1 and 𝟙
|
||
// represents a value s.t. msb(𝟙) = 1)
|
||
// msb(a^𝟙) == (because ORing with 1 results in 1)
|
||
// msb(b)
|
||
//
|
||
//
|
||
// Here is an SMT-LIB verification of this formula:
|
||
//
|
||
// (define-fun lt ((a (_ BitVec 32)) (b (_ BitVec 32))) (_ BitVec 32)
|
||
// (bvxor a (bvor (bvxor a b) (bvxor (bvsub a b) a)))
|
||
// )
|
||
//
|
||
// (declare-fun a () (_ BitVec 32))
|
||
// (declare-fun b () (_ BitVec 32))
|
||
//
|
||
// (assert (not (= (= #x00000001 (bvlshr (lt a b) #x0000001f)) (bvult a b))))
|
||
// (check-sat)
|
||
// (get-model)
|
||
return constant_time_msb_w(a ^ ((a ^ b) | ((a - b) ^ a)));
|
||
}
|
||
|
||
// constant_time_lt_8 acts like |constant_time_lt_w| but returns an 8-bit
|
||
// mask.
|
||
static inline uint8_t constant_time_lt_8(crypto_word_t a, crypto_word_t b) {
|
||
return (uint8_t)(constant_time_lt_w(a, b));
|
||
}
|
||
|
||
// constant_time_ge_w returns 0xff..f if a >= b and 0 otherwise.
|
||
static inline crypto_word_t constant_time_ge_w(crypto_word_t a,
|
||
crypto_word_t b) {
|
||
return ~constant_time_lt_w(a, b);
|
||
}
|
||
|
||
// constant_time_ge_8 acts like |constant_time_ge_w| but returns an 8-bit
|
||
// mask.
|
||
static inline uint8_t constant_time_ge_8(crypto_word_t a, crypto_word_t b) {
|
||
return (uint8_t)(constant_time_ge_w(a, b));
|
||
}
|
||
|
||
// constant_time_is_zero returns 0xff..f if a == 0 and 0 otherwise.
|
||
static inline crypto_word_t constant_time_is_zero_w(crypto_word_t a) {
|
||
// Here is an SMT-LIB verification of this formula:
|
||
//
|
||
// (define-fun is_zero ((a (_ BitVec 32))) (_ BitVec 32)
|
||
// (bvand (bvnot a) (bvsub a #x00000001))
|
||
// )
|
||
//
|
||
// (declare-fun a () (_ BitVec 32))
|
||
//
|
||
// (assert (not (= (= #x00000001 (bvlshr (is_zero a) #x0000001f)) (= a
|
||
// #x00000000)))) (check-sat) (get-model)
|
||
return constant_time_msb_w(~a & (a - 1));
|
||
}
|
||
|
||
// constant_time_is_zero_8 acts like |constant_time_is_zero_w| but returns an
|
||
// 8-bit mask.
|
||
static inline uint8_t constant_time_is_zero_8(crypto_word_t a) {
|
||
return (uint8_t)(constant_time_is_zero_w(a));
|
||
}
|
||
|
||
// constant_time_eq_w returns 0xff..f if a == b and 0 otherwise.
|
||
static inline crypto_word_t constant_time_eq_w(crypto_word_t a,
|
||
crypto_word_t b) {
|
||
return constant_time_is_zero_w(a ^ b);
|
||
}
|
||
|
||
// constant_time_eq_8 acts like |constant_time_eq_w| but returns an 8-bit
|
||
// mask.
|
||
static inline uint8_t constant_time_eq_8(crypto_word_t a, crypto_word_t b) {
|
||
return (uint8_t)(constant_time_eq_w(a, b));
|
||
}
|
||
|
||
// constant_time_eq_int acts like |constant_time_eq_w| but works on int
|
||
// values.
|
||
static inline crypto_word_t constant_time_eq_int(int a, int b) {
|
||
return constant_time_eq_w((crypto_word_t)(a), (crypto_word_t)(b));
|
||
}
|
||
|
||
// constant_time_eq_int_8 acts like |constant_time_eq_int| but returns an 8-bit
|
||
// mask.
|
||
static inline uint8_t constant_time_eq_int_8(int a, int b) {
|
||
return constant_time_eq_8((crypto_word_t)(a), (crypto_word_t)(b));
|
||
}
|
||
|
||
// constant_time_select_w returns (mask & a) | (~mask & b). When |mask| is all
|
||
// 1s or all 0s (as returned by the methods above), the select methods return
|
||
// either |a| (if |mask| is nonzero) or |b| (if |mask| is zero).
|
||
static inline crypto_word_t constant_time_select_w(crypto_word_t mask,
|
||
crypto_word_t a,
|
||
crypto_word_t b) {
|
||
// Clang recognizes this pattern as a select. While it usually transforms it
|
||
// to a cmov, it sometimes further transforms it into a branch, which we do
|
||
// not want.
|
||
//
|
||
// Hiding the value of the mask from the compiler evades this transformation.
|
||
mask = value_barrier_w(mask);
|
||
return (mask & a) | (~mask & b);
|
||
}
|
||
|
||
// constant_time_select_8 acts like |constant_time_select| but operates on
|
||
// 8-bit values.
|
||
static inline uint8_t constant_time_select_8(crypto_word_t mask, uint8_t a,
|
||
uint8_t b) {
|
||
// |mask| is a word instead of |uint8_t| to avoid materializing 0x000..0MM
|
||
// Making both |mask| and its value barrier |uint8_t| would allow the compiler
|
||
// to materialize 0x????..?MM instead, but only clang is that clever.
|
||
// However, vectorization of bitwise operations seems to work better on
|
||
// |uint8_t| than a mix of |uint64_t| and |uint8_t|, so |m| is cast to
|
||
// |uint8_t| after the value barrier but before the bitwise operations.
|
||
uint8_t m = value_barrier_w(mask);
|
||
return (m & a) | (~m & b);
|
||
}
|
||
|
||
// constant_time_select_int acts like |constant_time_select| but operates on
|
||
// ints.
|
||
static inline int constant_time_select_int(crypto_word_t mask, int a, int b) {
|
||
return (int)(constant_time_select_w(mask, (crypto_word_t)(a),
|
||
(crypto_word_t)(b)));
|
||
}
|
||
|
||
// constant_time_conditional_memcpy copies |n| bytes from |src| to |dst| if
|
||
// |mask| is 0xff..ff and does nothing if |mask| is 0. The |n|-byte memory
|
||
// ranges at |dst| and |src| must not overlap, as when calling |memcpy|.
|
||
static inline void constant_time_conditional_memcpy(void *dst, const void *src,
|
||
const size_t n,
|
||
const crypto_word_t mask) {
|
||
assert(!buffers_alias(dst, n, src, n));
|
||
uint8_t *out = (uint8_t *)dst;
|
||
const uint8_t *in = (const uint8_t *)src;
|
||
for (size_t i = 0; i < n; i++) {
|
||
out[i] = constant_time_select_8(mask, in[i], out[i]);
|
||
}
|
||
}
|
||
|
||
// constant_time_conditional_memxor xors |n| bytes from |src| to |dst| if
|
||
// |mask| is 0xff..ff and does nothing if |mask| is 0. The |n|-byte memory
|
||
// ranges at |dst| and |src| must not overlap, as when calling |memcpy|.
|
||
static inline void constant_time_conditional_memxor(void *dst, const void *src,
|
||
size_t n,
|
||
const crypto_word_t mask) {
|
||
assert(!buffers_alias(dst, n, src, n));
|
||
uint8_t *out = (uint8_t *)dst;
|
||
const uint8_t *in = (const uint8_t *)src;
|
||
#if defined(__GNUC__) && !defined(__clang__)
|
||
// gcc 13.2.0 doesn't automatically vectorize this loop regardless of barrier
|
||
typedef uint8_t v32u8 __attribute__((vector_size(32), aligned(1), may_alias));
|
||
size_t n_vec = n & ~(size_t)31;
|
||
v32u8 masks = ((uint8_t)mask - (v32u8){}); // broadcast
|
||
for (size_t i = 0; i < n_vec; i += 32) {
|
||
*(v32u8 *)&out[i] ^= masks & *(v32u8 *)&in[i];
|
||
}
|
||
out += n_vec;
|
||
n -= n_vec;
|
||
#endif
|
||
for (size_t i = 0; i < n; i++) {
|
||
out[i] ^= value_barrier_w(mask) & in[i];
|
||
}
|
||
}
|
||
|
||
#if defined(BORINGSSL_CONSTANT_TIME_VALIDATION)
|
||
|
||
// CONSTTIME_SECRET takes a pointer and a number of bytes and marks that region
|
||
// of memory as secret. Secret data is tracked as it flows to registers and
|
||
// other parts of a memory. If secret data is used as a condition for a branch,
|
||
// or as a memory index, it will trigger warnings in valgrind.
|
||
#define CONSTTIME_SECRET(ptr, len) VALGRIND_MAKE_MEM_UNDEFINED(ptr, len)
|
||
|
||
// CONSTTIME_DECLASSIFY takes a pointer and a number of bytes and marks that
|
||
// region of memory as public. Public data is not subject to constant-time
|
||
// rules.
|
||
#define CONSTTIME_DECLASSIFY(ptr, len) VALGRIND_MAKE_MEM_DEFINED(ptr, len)
|
||
|
||
#else
|
||
|
||
#define CONSTTIME_SECRET(ptr, len)
|
||
#define CONSTTIME_DECLASSIFY(ptr, len)
|
||
|
||
#endif // BORINGSSL_CONSTANT_TIME_VALIDATION
|
||
|
||
static inline crypto_word_t constant_time_declassify_w(crypto_word_t v) {
|
||
// Return |v| through a value barrier to be safe. Valgrind-based constant-time
|
||
// validation is partly to check the compiler has not undone any constant-time
|
||
// work. Any place |BORINGSSL_CONSTANT_TIME_VALIDATION| influences
|
||
// optimizations, this validation is inaccurate.
|
||
//
|
||
// However, by sending pointers through valgrind, we likely inhibit escape
|
||
// analysis. On local variables, particularly booleans, we likely
|
||
// significantly impact optimizations.
|
||
//
|
||
// Thus, to be safe, stick a value barrier, in hopes of comparably inhibiting
|
||
// compiler analysis.
|
||
CONSTTIME_DECLASSIFY(&v, sizeof(v));
|
||
return value_barrier_w(v);
|
||
}
|
||
|
||
static inline int constant_time_declassify_int(int v) {
|
||
static_assert(sizeof(uint32_t) == sizeof(int),
|
||
"int is not the same size as uint32_t");
|
||
// See comment above.
|
||
CONSTTIME_DECLASSIFY(&v, sizeof(v));
|
||
return value_barrier_u32(v);
|
||
}
|
||
|
||
// declassify_assert behaves like |assert| but declassifies the result of
|
||
// evaluating |expr|. This allows the assertion to branch on the (presumably
|
||
// public) result, but still ensures that values leading up to the computation
|
||
// were secret.
|
||
#define declassify_assert(expr) assert(constant_time_declassify_int(expr))
|
||
|
||
|
||
// Thread-safe initialisation.
|
||
|
||
#if !defined(OPENSSL_THREADS)
|
||
typedef uint32_t CRYPTO_once_t;
|
||
#define CRYPTO_ONCE_INIT 0
|
||
#elif defined(OPENSSL_WINDOWS_THREADS)
|
||
typedef INIT_ONCE CRYPTO_once_t;
|
||
#define CRYPTO_ONCE_INIT INIT_ONCE_STATIC_INIT
|
||
#elif defined(OPENSSL_PTHREADS)
|
||
typedef pthread_once_t CRYPTO_once_t;
|
||
#define CRYPTO_ONCE_INIT PTHREAD_ONCE_INIT
|
||
#else
|
||
#error "Unknown threading library"
|
||
#endif
|
||
|
||
// CRYPTO_once calls |init| exactly once per process. This is thread-safe: if
|
||
// concurrent threads call |CRYPTO_once| with the same |CRYPTO_once_t| argument
|
||
// then they will block until |init| completes, but |init| will have only been
|
||
// called once.
|
||
//
|
||
// The |once| argument must be a |CRYPTO_once_t| that has been initialised with
|
||
// the value |CRYPTO_ONCE_INIT|.
|
||
OPENSSL_EXPORT void CRYPTO_once(CRYPTO_once_t *once, void (*init)(void));
|
||
|
||
|
||
// Atomics.
|
||
//
|
||
// The following functions provide an API analogous to <stdatomic.h> from C11
|
||
// and abstract between a few variations on atomics we need to support.
|
||
|
||
#if defined(OPENSSL_THREADS)
|
||
|
||
using CRYPTO_atomic_u32 = std::atomic<uint32_t>;
|
||
|
||
static_assert(sizeof(CRYPTO_atomic_u32) == sizeof(uint32_t), "");
|
||
|
||
inline uint32_t CRYPTO_atomic_load_u32(const CRYPTO_atomic_u32 *val) {
|
||
return val->load(std::memory_order_seq_cst);
|
||
}
|
||
|
||
inline bool CRYPTO_atomic_compare_exchange_weak_u32(CRYPTO_atomic_u32 *val,
|
||
uint32_t *expected,
|
||
uint32_t desired) {
|
||
return val->compare_exchange_weak(
|
||
*expected, desired, std::memory_order_seq_cst, std::memory_order_seq_cst);
|
||
}
|
||
|
||
inline void CRYPTO_atomic_store_u32(CRYPTO_atomic_u32 *val, uint32_t desired) {
|
||
val->store(desired, std::memory_order_seq_cst);
|
||
}
|
||
|
||
#else
|
||
|
||
typedef uint32_t CRYPTO_atomic_u32;
|
||
|
||
inline uint32_t CRYPTO_atomic_load_u32(CRYPTO_atomic_u32 *val) { return *val; }
|
||
|
||
inline int CRYPTO_atomic_compare_exchange_weak_u32(CRYPTO_atomic_u32 *val,
|
||
uint32_t *expected,
|
||
uint32_t desired) {
|
||
if (*val != *expected) {
|
||
*expected = *val;
|
||
return 0;
|
||
}
|
||
*val = desired;
|
||
return 1;
|
||
}
|
||
|
||
inline void CRYPTO_atomic_store_u32(CRYPTO_atomic_u32 *val, uint32_t desired) {
|
||
*val = desired;
|
||
}
|
||
|
||
#endif
|
||
|
||
// See the comment in the |__cplusplus| section above.
|
||
static_assert(sizeof(CRYPTO_atomic_u32) == sizeof(uint32_t),
|
||
"CRYPTO_atomic_u32 does not match uint32_t size");
|
||
static_assert(alignof(CRYPTO_atomic_u32) == alignof(uint32_t),
|
||
"CRYPTO_atomic_u32 does not match uint32_t alignment");
|
||
|
||
|
||
// Reference counting.
|
||
|
||
// CRYPTO_REFCOUNT_MAX is the value at which the reference count saturates.
|
||
#define CRYPTO_REFCOUNT_MAX 0xffffffff
|
||
|
||
// CRYPTO_refcount_inc atomically increments the value at |*count| unless the
|
||
// value would overflow. It's safe for multiple threads to concurrently call
|
||
// this or |CRYPTO_refcount_dec_and_test_zero| on the same
|
||
// |CRYPTO_refcount_t|.
|
||
OPENSSL_EXPORT void CRYPTO_refcount_inc(CRYPTO_refcount_t *count);
|
||
|
||
// CRYPTO_refcount_dec_and_test_zero tests the value at |*count|:
|
||
// if it's zero, it crashes the address space.
|
||
// if it's the maximum value, it returns zero.
|
||
// otherwise, it atomically decrements it and returns one iff the resulting
|
||
// value is zero.
|
||
//
|
||
// It's safe for multiple threads to concurrently call this or
|
||
// |CRYPTO_refcount_inc| on the same |CRYPTO_refcount_t|.
|
||
OPENSSL_EXPORT int CRYPTO_refcount_dec_and_test_zero(CRYPTO_refcount_t *count);
|
||
|
||
|
||
// Locks.
|
||
|
||
#if !defined(OPENSSL_THREADS)
|
||
typedef struct crypto_mutex_st {
|
||
char padding; // Empty structs have different sizes in C and C++.
|
||
} CRYPTO_MUTEX;
|
||
#define CRYPTO_MUTEX_INIT {0}
|
||
#elif defined(OPENSSL_WINDOWS_THREADS)
|
||
typedef SRWLOCK CRYPTO_MUTEX;
|
||
#define CRYPTO_MUTEX_INIT SRWLOCK_INIT
|
||
#elif defined(OPENSSL_PTHREADS)
|
||
typedef pthread_rwlock_t CRYPTO_MUTEX;
|
||
#define CRYPTO_MUTEX_INIT PTHREAD_RWLOCK_INITIALIZER
|
||
#else
|
||
#error "Unknown threading library"
|
||
#endif
|
||
|
||
// CRYPTO_MUTEX_init initialises |lock|. If |lock| is a static variable, use a
|
||
// |CRYPTO_MUTEX_INIT|.
|
||
OPENSSL_EXPORT void CRYPTO_MUTEX_init(CRYPTO_MUTEX *lock);
|
||
|
||
// CRYPTO_MUTEX_lock_read locks |lock| such that other threads may also have a
|
||
// read lock, but none may have a write lock.
|
||
OPENSSL_EXPORT void CRYPTO_MUTEX_lock_read(CRYPTO_MUTEX *lock);
|
||
|
||
// CRYPTO_MUTEX_lock_write locks |lock| such that no other thread has any type
|
||
// of lock on it.
|
||
OPENSSL_EXPORT void CRYPTO_MUTEX_lock_write(CRYPTO_MUTEX *lock);
|
||
|
||
// CRYPTO_MUTEX_unlock_read unlocks |lock| for reading.
|
||
OPENSSL_EXPORT void CRYPTO_MUTEX_unlock_read(CRYPTO_MUTEX *lock);
|
||
|
||
// CRYPTO_MUTEX_unlock_write unlocks |lock| for writing.
|
||
OPENSSL_EXPORT void CRYPTO_MUTEX_unlock_write(CRYPTO_MUTEX *lock);
|
||
|
||
// CRYPTO_MUTEX_cleanup releases all resources held by |lock|.
|
||
OPENSSL_EXPORT void CRYPTO_MUTEX_cleanup(CRYPTO_MUTEX *lock);
|
||
|
||
#if defined(__cplusplus)
|
||
extern "C++" {
|
||
|
||
BSSL_NAMESPACE_BEGIN
|
||
|
||
namespace internal {
|
||
|
||
// MutexLockBase is a RAII helper for CRYPTO_MUTEX locking.
|
||
template <void (*LockFunc)(CRYPTO_MUTEX *), void (*ReleaseFunc)(CRYPTO_MUTEX *)>
|
||
class MutexLockBase {
|
||
public:
|
||
explicit MutexLockBase(CRYPTO_MUTEX *mu) : mu_(mu) {
|
||
assert(mu_ != nullptr);
|
||
LockFunc(mu_);
|
||
}
|
||
~MutexLockBase() { ReleaseFunc(mu_); }
|
||
MutexLockBase(const MutexLockBase<LockFunc, ReleaseFunc> &) = delete;
|
||
MutexLockBase &operator=(const MutexLockBase<LockFunc, ReleaseFunc> &) =
|
||
delete;
|
||
|
||
private:
|
||
CRYPTO_MUTEX *const mu_;
|
||
};
|
||
|
||
} // namespace internal
|
||
|
||
using MutexWriteLock =
|
||
internal::MutexLockBase<CRYPTO_MUTEX_lock_write, CRYPTO_MUTEX_unlock_write>;
|
||
using MutexReadLock =
|
||
internal::MutexLockBase<CRYPTO_MUTEX_lock_read, CRYPTO_MUTEX_unlock_read>;
|
||
|
||
BSSL_NAMESPACE_END
|
||
|
||
} // extern "C++"
|
||
#endif // defined(__cplusplus)
|
||
|
||
|
||
// Thread local storage.
|
||
|
||
// thread_local_data_t enumerates the types of thread-local data that can be
|
||
// stored.
|
||
typedef enum {
|
||
OPENSSL_THREAD_LOCAL_ERR = 0,
|
||
OPENSSL_THREAD_LOCAL_RAND,
|
||
OPENSSL_THREAD_LOCAL_FIPS_COUNTERS,
|
||
OPENSSL_THREAD_LOCAL_FIPS_SERVICE_INDICATOR_STATE,
|
||
OPENSSL_THREAD_LOCAL_TEST,
|
||
NUM_OPENSSL_THREAD_LOCALS,
|
||
} thread_local_data_t;
|
||
|
||
// thread_local_destructor_t is the type of a destructor function that will be
|
||
// called when a thread exits and its thread-local storage needs to be freed.
|
||
typedef void (*thread_local_destructor_t)(void *);
|
||
|
||
// CRYPTO_get_thread_local gets the pointer value that is stored for the
|
||
// current thread for the given index, or NULL if none has been set.
|
||
OPENSSL_EXPORT void *CRYPTO_get_thread_local(thread_local_data_t value);
|
||
|
||
// CRYPTO_set_thread_local sets a pointer value for the current thread at the
|
||
// given index. This function should only be called once per thread for a given
|
||
// |index|: rather than update the pointer value itself, update the data that
|
||
// is pointed to.
|
||
//
|
||
// The destructor function will be called when a thread exits to free this
|
||
// thread-local data. All calls to |CRYPTO_set_thread_local| with the same
|
||
// |index| should have the same |destructor| argument. The destructor may be
|
||
// called with a NULL argument if a thread that never set a thread-local
|
||
// pointer for |index|, exits. The destructor may be called concurrently with
|
||
// different arguments.
|
||
//
|
||
// This function returns one on success or zero on error. If it returns zero
|
||
// then |destructor| has been called with |value| already.
|
||
OPENSSL_EXPORT int CRYPTO_set_thread_local(
|
||
thread_local_data_t index, void *value,
|
||
thread_local_destructor_t destructor);
|
||
|
||
|
||
// ex_data
|
||
|
||
typedef struct crypto_ex_data_func_st CRYPTO_EX_DATA_FUNCS;
|
||
|
||
// CRYPTO_EX_DATA_CLASS tracks the ex_indices registered for a type which
|
||
// supports ex_data. It should defined as a static global within the module
|
||
// which defines that type.
|
||
typedef struct {
|
||
CRYPTO_MUTEX lock;
|
||
// funcs is a linked list of |CRYPTO_EX_DATA_FUNCS| structures. It may be
|
||
// traversed without serialization only up to |num_funcs|. last points to the
|
||
// final entry of |funcs|, or NULL if empty.
|
||
CRYPTO_EX_DATA_FUNCS *funcs, *last;
|
||
// num_funcs is the number of entries in |funcs|.
|
||
CRYPTO_atomic_u32 num_funcs;
|
||
// num_reserved is one if the ex_data index zero is reserved for legacy
|
||
// |TYPE_get_app_data| functions.
|
||
uint8_t num_reserved;
|
||
} CRYPTO_EX_DATA_CLASS;
|
||
|
||
#define CRYPTO_EX_DATA_CLASS_INIT {CRYPTO_MUTEX_INIT, NULL, NULL, {}, 0}
|
||
#define CRYPTO_EX_DATA_CLASS_INIT_WITH_APP_DATA \
|
||
{CRYPTO_MUTEX_INIT, NULL, NULL, {}, 1}
|
||
|
||
// CRYPTO_get_ex_new_index_ex allocates a new index for |ex_data_class|. Each
|
||
// class of object should provide a wrapper function that uses the correct
|
||
// |CRYPTO_EX_DATA_CLASS|. It returns the new index on success and -1 on error.
|
||
OPENSSL_EXPORT int CRYPTO_get_ex_new_index_ex(
|
||
CRYPTO_EX_DATA_CLASS *ex_data_class, long argl, void *argp,
|
||
CRYPTO_EX_free *free_func);
|
||
|
||
// CRYPTO_set_ex_data sets an extra data pointer on a given object. Each class
|
||
// of object should provide a wrapper function.
|
||
OPENSSL_EXPORT int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int index, void *val);
|
||
|
||
// CRYPTO_get_ex_data returns an extra data pointer for a given object, or NULL
|
||
// if no such index exists. Each class of object should provide a wrapper
|
||
// function.
|
||
OPENSSL_EXPORT void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int index);
|
||
|
||
// CRYPTO_new_ex_data initialises a newly allocated |CRYPTO_EX_DATA|.
|
||
OPENSSL_EXPORT void CRYPTO_new_ex_data(CRYPTO_EX_DATA *ad);
|
||
|
||
// CRYPTO_free_ex_data frees |ad|, which is embedded inside |obj|, which is an
|
||
// object of the given class.
|
||
OPENSSL_EXPORT void CRYPTO_free_ex_data(CRYPTO_EX_DATA_CLASS *ex_data_class,
|
||
void *obj, CRYPTO_EX_DATA *ad);
|
||
|
||
|
||
// Endianness conversions.
|
||
|
||
#if defined(__GNUC__) && __GNUC__ >= 2
|
||
static inline uint16_t CRYPTO_bswap2(uint16_t x) {
|
||
return __builtin_bswap16(x);
|
||
}
|
||
|
||
static inline uint32_t CRYPTO_bswap4(uint32_t x) {
|
||
return __builtin_bswap32(x);
|
||
}
|
||
|
||
static inline uint64_t CRYPTO_bswap8(uint64_t x) {
|
||
return __builtin_bswap64(x);
|
||
}
|
||
#elif defined(_MSC_VER)
|
||
#pragma intrinsic(_byteswap_uint64, _byteswap_ulong, _byteswap_ushort)
|
||
static inline uint16_t CRYPTO_bswap2(uint16_t x) { return _byteswap_ushort(x); }
|
||
|
||
static inline uint32_t CRYPTO_bswap4(uint32_t x) { return _byteswap_ulong(x); }
|
||
|
||
static inline uint64_t CRYPTO_bswap8(uint64_t x) { return _byteswap_uint64(x); }
|
||
#else
|
||
static inline uint16_t CRYPTO_bswap2(uint16_t x) { return (x >> 8) | (x << 8); }
|
||
|
||
static inline uint32_t CRYPTO_bswap4(uint32_t x) {
|
||
x = (x >> 16) | (x << 16);
|
||
x = ((x & 0xff00ff00) >> 8) | ((x & 0x00ff00ff) << 8);
|
||
return x;
|
||
}
|
||
|
||
static inline uint64_t CRYPTO_bswap8(uint64_t x) {
|
||
return CRYPTO_bswap4(x >> 32) | (((uint64_t)CRYPTO_bswap4(x)) << 32);
|
||
}
|
||
#endif
|
||
|
||
|
||
// Language bug workarounds.
|
||
//
|
||
// 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
|
||
//
|
||
// These wrapper functions behave the same as the corresponding C standard
|
||
// functions, but behave as expected when passed NULL if the length is zero.
|
||
//
|
||
// Note |OPENSSL_memcmp| is a different function from |CRYPTO_memcmp|.
|
||
|
||
// C++ defines |memchr| as a const-correct overload.
|
||
#if defined(__cplusplus)
|
||
extern "C++" {
|
||
|
||
static inline const void *OPENSSL_memchr(const void *s, int c, size_t n) {
|
||
if (n == 0) {
|
||
return NULL;
|
||
}
|
||
|
||
return memchr(s, c, n);
|
||
}
|
||
|
||
static inline void *OPENSSL_memchr(void *s, int c, size_t n) {
|
||
if (n == 0) {
|
||
return NULL;
|
||
}
|
||
|
||
return memchr(s, c, n);
|
||
}
|
||
|
||
} // extern "C++"
|
||
#else // __cplusplus
|
||
|
||
static inline void *OPENSSL_memchr(const void *s, int c, size_t n) {
|
||
if (n == 0) {
|
||
return NULL;
|
||
}
|
||
|
||
return memchr(s, c, n);
|
||
}
|
||
|
||
#endif // __cplusplus
|
||
|
||
static inline int OPENSSL_memcmp(const void *s1, const void *s2, size_t n) {
|
||
if (n == 0) {
|
||
return 0;
|
||
}
|
||
|
||
return memcmp(s1, s2, n);
|
||
}
|
||
|
||
static inline void *OPENSSL_memcpy(void *dst, const void *src, size_t n) {
|
||
if (n == 0) {
|
||
return dst;
|
||
}
|
||
|
||
return memcpy(dst, src, n);
|
||
}
|
||
|
||
static inline void *OPENSSL_memmove(void *dst, const void *src, size_t n) {
|
||
if (n == 0) {
|
||
return dst;
|
||
}
|
||
|
||
return memmove(dst, src, n);
|
||
}
|
||
|
||
static inline void *OPENSSL_memset(void *dst, int c, size_t n) {
|
||
if (n == 0) {
|
||
return dst;
|
||
}
|
||
|
||
return memset(dst, c, n);
|
||
}
|
||
|
||
|
||
// Loads and stores.
|
||
//
|
||
// The following functions load and store sized integers with the specified
|
||
// endianness. They use |memcpy|, and so avoid alignment or strict aliasing
|
||
// requirements on the input and output pointers.
|
||
|
||
static inline uint16_t CRYPTO_load_u16_be(const void *in) {
|
||
uint16_t v;
|
||
OPENSSL_memcpy(&v, in, sizeof(v));
|
||
return CRYPTO_bswap2(v);
|
||
}
|
||
|
||
static inline void CRYPTO_store_u16_be(void *out, uint16_t v) {
|
||
v = CRYPTO_bswap2(v);
|
||
OPENSSL_memcpy(out, &v, sizeof(v));
|
||
}
|
||
|
||
static inline uint32_t CRYPTO_load_u32_le(const void *in) {
|
||
uint32_t v;
|
||
OPENSSL_memcpy(&v, in, sizeof(v));
|
||
return v;
|
||
}
|
||
|
||
static inline void CRYPTO_store_u32_le(void *out, uint32_t v) {
|
||
OPENSSL_memcpy(out, &v, sizeof(v));
|
||
}
|
||
|
||
static inline uint32_t CRYPTO_load_u32_be(const void *in) {
|
||
uint32_t v;
|
||
OPENSSL_memcpy(&v, in, sizeof(v));
|
||
return CRYPTO_bswap4(v);
|
||
}
|
||
|
||
static inline void CRYPTO_store_u32_be(void *out, uint32_t v) {
|
||
v = CRYPTO_bswap4(v);
|
||
OPENSSL_memcpy(out, &v, sizeof(v));
|
||
}
|
||
|
||
static inline uint64_t CRYPTO_load_u64_le(const void *in) {
|
||
uint64_t v;
|
||
OPENSSL_memcpy(&v, in, sizeof(v));
|
||
return v;
|
||
}
|
||
|
||
static inline void CRYPTO_store_u64_le(void *out, uint64_t v) {
|
||
OPENSSL_memcpy(out, &v, sizeof(v));
|
||
}
|
||
|
||
static inline uint64_t CRYPTO_load_u64_be(const void *ptr) {
|
||
uint64_t ret;
|
||
OPENSSL_memcpy(&ret, ptr, sizeof(ret));
|
||
return CRYPTO_bswap8(ret);
|
||
}
|
||
|
||
static inline void CRYPTO_store_u64_be(void *out, uint64_t v) {
|
||
v = CRYPTO_bswap8(v);
|
||
OPENSSL_memcpy(out, &v, sizeof(v));
|
||
}
|
||
|
||
static inline crypto_word_t CRYPTO_load_word_le(const void *in) {
|
||
crypto_word_t v;
|
||
OPENSSL_memcpy(&v, in, sizeof(v));
|
||
return v;
|
||
}
|
||
|
||
static inline void CRYPTO_store_word_le(void *out, crypto_word_t v) {
|
||
OPENSSL_memcpy(out, &v, sizeof(v));
|
||
}
|
||
|
||
static inline crypto_word_t CRYPTO_load_word_be(const void *in) {
|
||
crypto_word_t v;
|
||
OPENSSL_memcpy(&v, in, sizeof(v));
|
||
#if defined(OPENSSL_64_BIT)
|
||
static_assert(sizeof(v) == 8, "crypto_word_t has unexpected size");
|
||
return CRYPTO_bswap8(v);
|
||
#else
|
||
static_assert(sizeof(v) == 4, "crypto_word_t has unexpected size");
|
||
return CRYPTO_bswap4(v);
|
||
#endif
|
||
}
|
||
|
||
|
||
// Bit rotation functions.
|
||
//
|
||
// Note these functions use |(-shift) & 31|, etc., because shifting by the bit
|
||
// width is undefined. Both Clang and GCC recognize this pattern as a rotation,
|
||
// but MSVC does not. Instead, we call MSVC's built-in functions.
|
||
|
||
static inline uint32_t CRYPTO_rotl_u32(uint32_t value, int shift) {
|
||
#if defined(_MSC_VER)
|
||
return _rotl(value, shift);
|
||
#else
|
||
return (value << shift) | (value >> ((-shift) & 31));
|
||
#endif
|
||
}
|
||
|
||
static inline uint32_t CRYPTO_rotr_u32(uint32_t value, int shift) {
|
||
#if defined(_MSC_VER)
|
||
return _rotr(value, shift);
|
||
#else
|
||
return (value >> shift) | (value << ((-shift) & 31));
|
||
#endif
|
||
}
|
||
|
||
static inline uint64_t CRYPTO_rotl_u64(uint64_t value, int shift) {
|
||
#if defined(_MSC_VER)
|
||
return _rotl64(value, shift);
|
||
#else
|
||
return (value << shift) | (value >> ((-shift) & 63));
|
||
#endif
|
||
}
|
||
|
||
static inline uint64_t CRYPTO_rotr_u64(uint64_t value, int shift) {
|
||
#if defined(_MSC_VER)
|
||
return _rotr64(value, shift);
|
||
#else
|
||
return (value >> shift) | (value << ((-shift) & 63));
|
||
#endif
|
||
}
|
||
|
||
|
||
// FIPS functions.
|
||
|
||
#if defined(BORINGSSL_FIPS)
|
||
|
||
// BORINGSSL_FIPS_abort is called when a FIPS power-on or continuous test
|
||
// fails. It prevents any further cryptographic operations by the current
|
||
// process.
|
||
void BORINGSSL_FIPS_abort(void) __attribute__((noreturn));
|
||
|
||
// boringssl_self_test_startup runs all startup self tests and returns one on
|
||
// success or zero on error. Startup self tests do not include lazy tests.
|
||
// Call |BORINGSSL_self_test| to run every self test.
|
||
int boringssl_self_test_startup(void);
|
||
|
||
// boringssl_ensure_rsa_self_test checks whether the RSA self-test has been run
|
||
// in this address space. If not, it runs it and crashes the address space if
|
||
// unsuccessful.
|
||
void boringssl_ensure_rsa_self_test(void);
|
||
|
||
// boringssl_ensure_ecc_self_test checks whether the ECDSA and ECDH self-test
|
||
// has been run in this address space. If not, it runs it and crashes the
|
||
// address space if unsuccessful.
|
||
void boringssl_ensure_ecc_self_test(void);
|
||
|
||
// boringssl_ensure_ffdh_self_test checks whether the FFDH self-test has been
|
||
// run in this address space. If not, it runs it and crashes the address space
|
||
// if unsuccessful.
|
||
void boringssl_ensure_ffdh_self_test(void);
|
||
|
||
#else
|
||
|
||
// Outside of FIPS mode, the lazy tests are no-ops.
|
||
|
||
inline void boringssl_ensure_rsa_self_test(void) {}
|
||
inline void boringssl_ensure_ecc_self_test(void) {}
|
||
inline void boringssl_ensure_ffdh_self_test(void) {}
|
||
|
||
#endif // FIPS
|
||
|
||
// BORINGSSL_check_test memcmp's two values of equal length. It returns 1 on
|
||
// success and, on failure, it prints an error message that includes the
|
||
// hexdumps the two values and returns 0.
|
||
int BORINGSSL_check_test(const void *expected, const void *actual,
|
||
size_t expected_len, const char *name);
|
||
|
||
// boringssl_self_test_sha256 performs a SHA-256 KAT.
|
||
int boringssl_self_test_sha256(void);
|
||
|
||
// boringssl_self_test_sha512 performs a SHA-512 KAT.
|
||
int boringssl_self_test_sha512(void);
|
||
|
||
// boringssl_self_test_hmac_sha256 performs an HMAC-SHA-256 KAT.
|
||
int boringssl_self_test_hmac_sha256(void);
|
||
|
||
// boringssl_self_test_mlkem performs the ML-KEM KATs.
|
||
OPENSSL_EXPORT int boringssl_self_test_mlkem(void);
|
||
|
||
// boringssl_self_test_mldsa performs the ML-DSA KATs.
|
||
OPENSSL_EXPORT int boringssl_self_test_mldsa(void);
|
||
|
||
// boringssl_self_test_slhdsa performs the SLH-DSA KATs.
|
||
OPENSSL_EXPORT int boringssl_self_test_slhdsa(void);
|
||
|
||
#if defined(BORINGSSL_FIPS_COUNTERS)
|
||
void boringssl_fips_inc_counter(enum fips_counter_t counter);
|
||
#else
|
||
inline void boringssl_fips_inc_counter(enum fips_counter_t counter) {}
|
||
#endif
|
||
|
||
#if defined(BORINGSSL_FIPS_BREAK_TESTS)
|
||
inline int boringssl_fips_break_test(const char *test) {
|
||
const char *const value = getenv("BORINGSSL_FIPS_BREAK_TEST");
|
||
return value != NULL && strcmp(value, test) == 0;
|
||
}
|
||
#else
|
||
inline int boringssl_fips_break_test(const char *test) { return 0; }
|
||
#endif // BORINGSSL_FIPS_BREAK_TESTS
|
||
|
||
|
||
// Runtime CPU feature support
|
||
|
||
#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
|
||
// OPENSSL_ia32cap_P contains the Intel CPUID bits when running on an x86 or
|
||
// x86-64 system.
|
||
//
|
||
// Index 0:
|
||
// EDX for CPUID where EAX = 1
|
||
// Bit 30 is used to indicate an Intel CPU
|
||
// Index 1:
|
||
// ECX for CPUID where EAX = 1
|
||
// Index 2:
|
||
// EBX for CPUID where EAX = 7, ECX = 0
|
||
// Bit 14 (for removed feature MPX) is used to indicate a preference for ymm
|
||
// registers over zmm even when zmm registers are supported
|
||
// Index 3:
|
||
// ECX for CPUID where EAX = 7, ECX = 0
|
||
//
|
||
// Note: the CPUID bits are pre-adjusted for the OSXSAVE bit and the XMM, YMM,
|
||
// and AVX512 bits in XCR0, so it is not necessary to check those. (WARNING: See
|
||
// caveats in cpu_intel.c.)
|
||
//
|
||
// This symbol should only be accessed with |OPENSSL_get_ia32cap|.
|
||
extern uint32_t OPENSSL_ia32cap_P[4];
|
||
|
||
// OPENSSL_get_ia32cap initializes the library if needed and returns the |idx|th
|
||
// entry of |OPENSSL_ia32cap_P|. It is marked as a const function so duplicate
|
||
// calls can be merged by the compiler, at least when indices match.
|
||
OPENSSL_ATTR_CONST uint32_t OPENSSL_get_ia32cap(int idx);
|
||
|
||
// See Intel manual, volume 2A, table 3-11.
|
||
|
||
inline int CRYPTO_is_intel_cpu(void) {
|
||
// The reserved bit 30 is used to indicate an Intel CPU.
|
||
return (OPENSSL_get_ia32cap(0) & (1u << 30)) != 0;
|
||
}
|
||
|
||
// See Intel manual, volume 2A, table 3-10.
|
||
|
||
inline int CRYPTO_is_PCLMUL_capable(void) {
|
||
#if defined(__PCLMUL__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(1) & (1u << 1)) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_SSSE3_capable(void) {
|
||
#if defined(__SSSE3__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(1) & (1u << 9)) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_SSE4_1_capable(void) {
|
||
#if defined(__SSE4_1__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(1) & (1u << 19)) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_MOVBE_capable(void) {
|
||
#if defined(__MOVBE__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(1) & (1u << 22)) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_AESNI_capable(void) {
|
||
#if defined(__AES__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(1) & (1u << 25)) != 0;
|
||
#endif
|
||
}
|
||
|
||
// We intentionally avoid defining a |CRYPTO_is_XSAVE_capable| function. See
|
||
// |CRYPTO_cpu_perf_is_like_silvermont|.
|
||
|
||
inline int CRYPTO_is_AVX_capable(void) {
|
||
#if defined(__AVX__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(1) & (1u << 28)) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_RDRAND_capable(void) {
|
||
// We intentionally do not check |__RDRND__| here. On some AMD processors, we
|
||
// will act as if the hardware is RDRAND-incapable, even it actually supports
|
||
// it. See cpu_intel.c.
|
||
return (OPENSSL_get_ia32cap(1) & (1u << 30)) != 0;
|
||
}
|
||
|
||
// See Intel manual, volume 2A, table 3-8.
|
||
|
||
inline int CRYPTO_is_BMI1_capable(void) {
|
||
#if defined(__BMI__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(2) & (1u << 3)) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_AVX2_capable(void) {
|
||
#if defined(__AVX2__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(2) & (1u << 5)) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_BMI2_capable(void) {
|
||
#if defined(__BMI2__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(2) & (1u << 8)) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_ADX_capable(void) {
|
||
#if defined(__ADX__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(2) & (1u << 19)) != 0;
|
||
#endif
|
||
}
|
||
|
||
// SHA-1 and SHA-256 are defined as a single extension.
|
||
inline int CRYPTO_is_x86_SHA_capable(void) {
|
||
#if defined(__SHA__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(2) & (1u << 29)) != 0;
|
||
#endif
|
||
}
|
||
|
||
// CRYPTO_cpu_perf_is_like_silvermont returns one if, based on a heuristic, the
|
||
// CPU has Silvermont-like performance characteristics. It is often faster to
|
||
// run different codepaths on these CPUs than the available instructions would
|
||
// otherwise select. See chacha-x86_64.pl.
|
||
//
|
||
// Bonnell, Silvermont's predecessor in the Atom lineup, will also be matched by
|
||
// this. Goldmont (Silvermont's successor in the Atom lineup) added XSAVE so it
|
||
// isn't matched by this. Various sources indicate AMD first implemented MOVBE
|
||
// and XSAVE at the same time in Jaguar, so it seems like AMD chips will not be
|
||
// matched by this. That seems to be the case for other x86(-64) CPUs.
|
||
inline int CRYPTO_cpu_perf_is_like_silvermont(void) {
|
||
// WARNING: This MUST NOT be used to guard the execution of the XSAVE
|
||
// instruction. This is the "hardware supports XSAVE" bit, not the OSXSAVE bit
|
||
// that indicates whether we can safely execute XSAVE. This bit may be set
|
||
// even when XSAVE is disabled (by the operating system). See how the users of
|
||
// this bit use it.
|
||
//
|
||
// Historically, the XSAVE bit was artificially cleared on Knights Landing
|
||
// and Knights Mill chips, but as Intel has removed all support from GCC,
|
||
// LLVM, and SDE, we assume they are no longer worth special-casing.
|
||
int hardware_supports_xsave = (OPENSSL_get_ia32cap(1) & (1u << 26)) != 0;
|
||
return !hardware_supports_xsave && CRYPTO_is_MOVBE_capable();
|
||
}
|
||
|
||
inline int CRYPTO_is_AVX512BW_capable(void) {
|
||
#if defined(__AVX512BW__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(2) & (1u << 30)) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_AVX512VL_capable(void) {
|
||
#if defined(__AVX512VL__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(2) & (1u << 31)) != 0;
|
||
#endif
|
||
}
|
||
|
||
// CRYPTO_cpu_avoid_zmm_registers returns 1 if zmm registers (512-bit vectors)
|
||
// should not be used even if the CPU supports them.
|
||
//
|
||
// Note that this reuses the bit for the removed MPX feature.
|
||
inline int CRYPTO_cpu_avoid_zmm_registers(void) {
|
||
return (OPENSSL_get_ia32cap(2) & (1u << 14)) != 0;
|
||
}
|
||
|
||
inline int CRYPTO_is_VAES_capable(void) {
|
||
#if defined(__VAES__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(3) & (1u << 9)) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_VPCLMULQDQ_capable(void) {
|
||
#if defined(__VPCLMULQDQ__)
|
||
return 1;
|
||
#else
|
||
return (OPENSSL_get_ia32cap(3) & (1u << 10)) != 0;
|
||
#endif
|
||
}
|
||
|
||
#endif // OPENSSL_X86 || OPENSSL_X86_64
|
||
|
||
#if defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
|
||
|
||
// ARMV7_NEON indicates support for NEON.
|
||
#define ARMV7_NEON (1 << 0)
|
||
|
||
// ARMV8_AES indicates support for hardware AES instructions.
|
||
#define ARMV8_AES (1 << 2)
|
||
|
||
// ARMV8_SHA1 indicates support for hardware SHA-1 instructions.
|
||
#define ARMV8_SHA1 (1 << 3)
|
||
|
||
// ARMV8_SHA256 indicates support for hardware SHA-256 instructions.
|
||
#define ARMV8_SHA256 (1 << 4)
|
||
|
||
// ARMV8_PMULL indicates support for carryless multiplication.
|
||
#define ARMV8_PMULL (1 << 5)
|
||
|
||
// ARMV8_SHA512 indicates support for hardware SHA-512 instructions.
|
||
#define ARMV8_SHA512 (1 << 6)
|
||
|
||
// OPENSSL_armcap_P contains ARM CPU capabilities as a bitmask of the above
|
||
// constants. This should only be accessed with |OPENSSL_get_armcap|.
|
||
extern uint32_t OPENSSL_armcap_P;
|
||
|
||
// OPENSSL_get_armcap initializes the library if needed and returns ARM CPU
|
||
// capabilities. It is marked as a const function so duplicate calls can be
|
||
// merged by the compiler.
|
||
OPENSSL_ATTR_CONST uint32_t OPENSSL_get_armcap(void);
|
||
|
||
// Normalize some older feature flags to their modern ACLE values.
|
||
// https://developer.arm.com/architectures/system-architectures/software-standards/acle
|
||
#if defined(__ARM_NEON__) && !defined(__ARM_NEON)
|
||
#define __ARM_NEON 1
|
||
#endif
|
||
#if defined(__ARM_FEATURE_CRYPTO)
|
||
#if !defined(__ARM_FEATURE_AES)
|
||
#define __ARM_FEATURE_AES 1
|
||
#endif
|
||
#if !defined(__ARM_FEATURE_SHA2)
|
||
#define __ARM_FEATURE_SHA2 1
|
||
#endif
|
||
#endif
|
||
|
||
// CRYPTO_is_NEON_capable returns true if the current CPU has a NEON unit. If
|
||
// this is known statically, it is a constant inline function.
|
||
inline int CRYPTO_is_NEON_capable(void) {
|
||
#if defined(OPENSSL_STATIC_ARMCAP_NEON) || defined(__ARM_NEON)
|
||
return 1;
|
||
#elif defined(OPENSSL_STATIC_ARMCAP)
|
||
return 0;
|
||
#else
|
||
return (OPENSSL_get_armcap() & ARMV7_NEON) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_ARMv8_AES_capable(void) {
|
||
#if defined(OPENSSL_STATIC_ARMCAP_AES) || defined(__ARM_FEATURE_AES)
|
||
return 1;
|
||
#elif defined(OPENSSL_STATIC_ARMCAP)
|
||
return 0;
|
||
#else
|
||
return (OPENSSL_get_armcap() & ARMV8_AES) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_ARMv8_PMULL_capable(void) {
|
||
#if defined(OPENSSL_STATIC_ARMCAP_PMULL) || defined(__ARM_FEATURE_AES)
|
||
return 1;
|
||
#elif defined(OPENSSL_STATIC_ARMCAP)
|
||
return 0;
|
||
#else
|
||
return (OPENSSL_get_armcap() & ARMV8_PMULL) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_ARMv8_SHA1_capable(void) {
|
||
// SHA-1 and SHA-2 (only) share |__ARM_FEATURE_SHA2| but otherwise
|
||
// are dealt with independently.
|
||
#if defined(OPENSSL_STATIC_ARMCAP_SHA1) || defined(__ARM_FEATURE_SHA2)
|
||
return 1;
|
||
#elif defined(OPENSSL_STATIC_ARMCAP)
|
||
return 0;
|
||
#else
|
||
return (OPENSSL_get_armcap() & ARMV8_SHA1) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_ARMv8_SHA256_capable(void) {
|
||
// SHA-1 and SHA-2 (only) share |__ARM_FEATURE_SHA2| but otherwise
|
||
// are dealt with independently.
|
||
#if defined(OPENSSL_STATIC_ARMCAP_SHA256) || defined(__ARM_FEATURE_SHA2)
|
||
return 1;
|
||
#elif defined(OPENSSL_STATIC_ARMCAP)
|
||
return 0;
|
||
#else
|
||
return (OPENSSL_get_armcap() & ARMV8_SHA256) != 0;
|
||
#endif
|
||
}
|
||
|
||
inline int CRYPTO_is_ARMv8_SHA512_capable(void) {
|
||
// There is no |OPENSSL_STATIC_ARMCAP_SHA512|.
|
||
#if defined(__ARM_FEATURE_SHA512)
|
||
return 1;
|
||
#elif defined(OPENSSL_STATIC_ARMCAP)
|
||
return 0;
|
||
#else
|
||
return (OPENSSL_get_armcap() & ARMV8_SHA512) != 0;
|
||
#endif
|
||
}
|
||
|
||
#endif // OPENSSL_ARM || OPENSSL_AARCH64
|
||
|
||
|
||
#if defined(BORINGSSL_DISPATCH_TEST)
|
||
// Runtime CPU dispatch testing support
|
||
|
||
// BORINGSSL_function_hit is an array of flags. The following functions will
|
||
// set these flags if BORINGSSL_DISPATCH_TEST is defined.
|
||
// 0: aes_hw_ctr32_encrypt_blocks
|
||
// 1: aes_hw_encrypt
|
||
// 2: aesni_gcm_encrypt
|
||
// 3: aes_hw_set_encrypt_key
|
||
// 4: vpaes_encrypt
|
||
// 5: vpaes_set_encrypt_key
|
||
// 6: aes_gcm_enc_update_vaes_avx2
|
||
// 7: aes_gcm_enc_update_vaes_avx512
|
||
extern uint8_t BORINGSSL_function_hit[8];
|
||
#endif // BORINGSSL_DISPATCH_TEST
|
||
|
||
|
||
// OPENSSL_vasprintf_internal is just like |vasprintf(3)|. If |system_malloc| is
|
||
// 0, memory will be allocated with |OPENSSL_malloc| and must be freed with
|
||
// |OPENSSL_free|. Otherwise the system |malloc| function is used and the memory
|
||
// must be freed with the system |free| function.
|
||
OPENSSL_EXPORT int OPENSSL_vasprintf_internal(char **str, const char *format,
|
||
va_list args, int system_malloc)
|
||
OPENSSL_PRINTF_FORMAT_FUNC(2, 0);
|
||
|
||
|
||
// Fuzzer mode.
|
||
|
||
#if defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION)
|
||
// CRYPTO_fuzzer_mode_enabled returns whether fuzzer mode is enabled. See
|
||
// |CRYPTO_set_fuzzer_mode|. In non-fuzzer builds, this function statically
|
||
// returns zero so the codepaths will be deleted by the optimizer.
|
||
int CRYPTO_fuzzer_mode_enabled(void);
|
||
#else
|
||
inline int CRYPTO_fuzzer_mode_enabled(void) { return 0; }
|
||
#endif
|
||
|
||
|
||
#if defined(__cplusplus)
|
||
} // extern C
|
||
#endif
|
||
|
||
// Arithmetic functions.
|
||
|
||
// CRYPTO_addc_* returns |x + y + carry|, and sets |*out_carry| to the carry
|
||
// bit. |carry| must be zero or one.
|
||
#if OPENSSL_HAS_BUILTIN(__builtin_addc)
|
||
|
||
inline unsigned int CRYPTO_addc_impl(unsigned int x, unsigned int y,
|
||
unsigned int carry,
|
||
unsigned int *out_carry) {
|
||
return __builtin_addc(x, y, carry, out_carry);
|
||
}
|
||
|
||
inline unsigned long CRYPTO_addc_impl(unsigned long x, unsigned long y,
|
||
unsigned long carry,
|
||
unsigned long *out_carry) {
|
||
return __builtin_addcl(x, y, carry, out_carry);
|
||
}
|
||
|
||
inline unsigned long long CRYPTO_addc_impl(unsigned long long x,
|
||
unsigned long long y,
|
||
unsigned long long carry,
|
||
unsigned long long *out_carry) {
|
||
return __builtin_addcll(x, y, carry, out_carry);
|
||
}
|
||
|
||
inline uint32_t CRYPTO_addc_u32(uint32_t x, uint32_t y, uint32_t carry,
|
||
uint32_t *out_carry) {
|
||
return CRYPTO_addc_impl(x, y, carry, out_carry);
|
||
}
|
||
|
||
inline uint64_t CRYPTO_addc_u64(uint64_t x, uint64_t y, uint64_t carry,
|
||
uint64_t *out_carry) {
|
||
return CRYPTO_addc_impl(x, y, carry, out_carry);
|
||
}
|
||
|
||
#else
|
||
|
||
static inline uint32_t CRYPTO_addc_u32(uint32_t x, uint32_t y, uint32_t carry,
|
||
uint32_t *out_carry) {
|
||
declassify_assert(carry <= 1);
|
||
uint64_t ret = carry;
|
||
ret += (uint64_t)x + y;
|
||
*out_carry = (uint32_t)(ret >> 32);
|
||
return (uint32_t)ret;
|
||
}
|
||
|
||
static inline uint64_t CRYPTO_addc_u64(uint64_t x, uint64_t y, uint64_t carry,
|
||
uint64_t *out_carry) {
|
||
declassify_assert(carry <= 1);
|
||
#if defined(BORINGSSL_HAS_UINT128)
|
||
uint128_t ret = carry;
|
||
ret += (uint128_t)x + y;
|
||
*out_carry = (uint64_t)(ret >> 64);
|
||
return (uint64_t)ret;
|
||
#else
|
||
x += carry;
|
||
carry = x < carry;
|
||
uint64_t ret = x + y;
|
||
carry += ret < x;
|
||
*out_carry = carry;
|
||
return ret;
|
||
#endif
|
||
}
|
||
#endif
|
||
|
||
|
||
// CRYPTO_subc_* returns |x - y - borrow|, and sets |*out_borrow| to the borrow
|
||
// bit. |borrow| must be zero or one.
|
||
#if OPENSSL_HAS_BUILTIN(__builtin_subc)
|
||
|
||
inline unsigned int CRYPTO_subc_impl(unsigned int x, unsigned int y,
|
||
unsigned int borrow,
|
||
unsigned int *out_borrow) {
|
||
return __builtin_subc(x, y, borrow, out_borrow);
|
||
}
|
||
|
||
inline unsigned long CRYPTO_subc_impl(unsigned long x, unsigned long y,
|
||
unsigned long borrow,
|
||
unsigned long *out_borrow) {
|
||
return __builtin_subcl(x, y, borrow, out_borrow);
|
||
}
|
||
|
||
inline unsigned long long CRYPTO_subc_impl(unsigned long long x,
|
||
unsigned long long y,
|
||
unsigned long long borrow,
|
||
unsigned long long *out_borrow) {
|
||
return __builtin_subcll(x, y, borrow, out_borrow);
|
||
}
|
||
|
||
inline uint32_t CRYPTO_subc_u32(uint32_t x, uint32_t y, uint32_t borrow,
|
||
uint32_t *out_borrow) {
|
||
return CRYPTO_subc_impl(x, y, borrow, out_borrow);
|
||
}
|
||
|
||
inline uint64_t CRYPTO_subc_u64(uint64_t x, uint64_t y, uint64_t borrow,
|
||
uint64_t *out_borrow) {
|
||
return CRYPTO_subc_impl(x, y, borrow, out_borrow);
|
||
}
|
||
|
||
#else
|
||
|
||
static inline uint32_t CRYPTO_subc_u32(uint32_t x, uint32_t y, uint32_t borrow,
|
||
uint32_t *out_borrow) {
|
||
declassify_assert(borrow <= 1);
|
||
uint32_t ret = x - y - borrow;
|
||
*out_borrow = (x < y) | ((x == y) & borrow);
|
||
return ret;
|
||
}
|
||
|
||
static inline uint64_t CRYPTO_subc_u64(uint64_t x, uint64_t y, uint64_t borrow,
|
||
uint64_t *out_borrow) {
|
||
declassify_assert(borrow <= 1);
|
||
uint64_t ret = x - y - borrow;
|
||
*out_borrow = (x < y) | ((x == y) & borrow);
|
||
return ret;
|
||
}
|
||
#endif
|
||
|
||
#if defined(OPENSSL_64_BIT)
|
||
#define CRYPTO_addc_w CRYPTO_addc_u64
|
||
#define CRYPTO_subc_w CRYPTO_subc_u64
|
||
#else
|
||
#define CRYPTO_addc_w CRYPTO_addc_u32
|
||
#define CRYPTO_subc_w CRYPTO_subc_u32
|
||
#endif
|
||
|
||
|
||
#endif // OPENSSL_HEADER_CRYPTO_INTERNAL_H
|