use local library source instead to correct some black-box issue for aliyuniot

lib/Crypto/BigNumberUtil.h

@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2015 Southern Storm Software, Pty Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef CRYPTO_BIGNUMBERUTIL_h
+#define CRYPTO_BIGNUMBERUTIL_h
+
+#include <inttypes.h>
+#include <stddef.h>
+
+// Define exactly one of these to 1 to set the size of the basic limb type.
+#if defined(__AVR__) || defined(ESP8266)
+// 16-bit limbs seem to give the best performance on 8-bit AVR micros.
+// They also seem to give better performance on ESP8266 as well.
+#define BIGNUMBER_LIMB_8BIT  0
+#define BIGNUMBER_LIMB_16BIT 1
+#define BIGNUMBER_LIMB_32BIT 0
+#define BIGNUMBER_LIMB_64BIT 0
+#elif defined(__GNUC__) && __WORDSIZE == 64
+// 64-bit system with 128-bit double limbs.
+#define BIGNUMBER_LIMB_8BIT  0
+#define BIGNUMBER_LIMB_16BIT 0
+#define BIGNUMBER_LIMB_32BIT 0
+#define BIGNUMBER_LIMB_64BIT 1
+#else
+// On all other platforms, assume 32-bit is best.
+#define BIGNUMBER_LIMB_8BIT  0
+#define BIGNUMBER_LIMB_16BIT 0
+#define BIGNUMBER_LIMB_32BIT 1
+#define BIGNUMBER_LIMB_64BIT 0
+#endif
+
+// Define the limb types to use on this platform.
+#if BIGNUMBER_LIMB_8BIT
+typedef uint8_t limb_t;
+typedef int8_t slimb_t;
+typedef uint16_t dlimb_t;
+#elif BIGNUMBER_LIMB_16BIT
+typedef uint16_t limb_t;
+typedef int16_t slimb_t;
+typedef uint32_t dlimb_t;
+#elif BIGNUMBER_LIMB_32BIT
+typedef uint32_t limb_t;
+typedef int32_t slimb_t;
+typedef uint64_t dlimb_t;
+#elif BIGNUMBER_LIMB_64BIT
+typedef uint64_t limb_t;
+typedef int64_t slimb_t;
+typedef unsigned __int128 dlimb_t;
+#else
+#error "limb_t must be 8, 16, 32, or 64 bits in size"
+#endif
+
+class BigNumberUtil
+{
+public:
+    static void unpackLE(limb_t *limbs, size_t count,
+                         const uint8_t *bytes, size_t len);
+    static void unpackBE(limb_t *limbs, size_t count,
+                         const uint8_t *bytes, size_t len);
+    static void packLE(uint8_t *bytes, size_t len,
+                       const limb_t *limbs, size_t count);
+    static void packBE(uint8_t *bytes, size_t len,
+                       const limb_t *limbs, size_t count);
+
+    static limb_t add(limb_t *result, const limb_t *x,
+                      const limb_t *y, size_t size);
+    static limb_t sub(limb_t *result, const limb_t *x,
+                      const limb_t *y, size_t size);
+    static void mul(limb_t *result, const limb_t *x, size_t xcount,
+                    const limb_t *y, size_t ycount);
+    static void reduceQuick(limb_t *result, const limb_t *x,
+                            const limb_t *y, size_t size);
+
+    static limb_t add_P(limb_t *result, const limb_t *x,
+                        const limb_t *y, size_t size);
+    static limb_t sub_P(limb_t *result, const limb_t *x,
+                        const limb_t *y, size_t size);
+    static void mul_P(limb_t *result, const limb_t *x, size_t xcount,
+                      const limb_t *y, size_t ycount);
+    static void reduceQuick_P(limb_t *result, const limb_t *x,
+                              const limb_t *y, size_t size);
+
+    static limb_t isZero(const limb_t *x, size_t size);
+
+private:
+    // Constructor and destructor are private - cannot instantiate this class.
+    BigNumberUtil() {}
+    ~BigNumberUtil() {}
+};
+
+#endif