Diff: wolfcrypt/src/misc.c

Revision:

17:ff9d1e86ad5f

Parent:

16:048e5e270a58

--- a/wolfcrypt/src/misc.c	Tue Nov 19 14:32:16 2019 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,362 +0,0 @@
-/* misc.c
- *
- * Copyright (C) 2006-2017 wolfSSL Inc.
- *
- * This file is part of wolfSSL.
- *
- * wolfSSL is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * wolfSSL is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
- */
-
-
-#ifdef HAVE_CONFIG_H
-    #include <config.h>
-#endif
-
-#include <wolfssl/wolfcrypt/settings.h>
-
-#ifndef WOLF_CRYPT_MISC_C
-#define WOLF_CRYPT_MISC_C
-
-#include <wolfssl/wolfcrypt/misc.h>
-
-/* inlining these functions is a huge speed increase and a small size decrease,
-   because the functions are smaller than function call setup/cleanup, e.g.,
-   md5 benchmark is twice as fast with inline.  If you don't want it, then
-   define NO_INLINE and compile this file into wolfssl, otherwise it's used as
-   a source header
- */
-
-#ifdef NO_INLINE
-    #define STATIC
-#else
-    #define STATIC static
-#endif
-
-/* Check for if compiling misc.c when not needed. */
-#if !defined(WOLFSSL_MISC_INCLUDED) && !defined(NO_INLINE)
-    #ifndef WOLFSSL_IGNORE_FILE_WARN
-        #warning misc.c does not need to be compiled when using inline (NO_INLINE not defined)
-    #endif
-
-#else
-
-
-#if defined(__ICCARM__)
-    #include <intrinsics.h>
-#endif
-
-
-#ifdef INTEL_INTRINSICS
-
-    #include <stdlib.h>      /* get intrinsic definitions */
-
-    /* for non visual studio probably need no long version, 32 bit only
-     * i.e., _rotl and _rotr */
-    #pragma intrinsic(_lrotl, _lrotr)
-
-    STATIC WC_INLINE word32 rotlFixed(word32 x, word32 y)
-    {
-        return y ? _lrotl(x, y) : x;
-    }
-
-    STATIC WC_INLINE word32 rotrFixed(word32 x, word32 y)
-    {
-        return y ? _lrotr(x, y) : x;
-    }
-
-#else /* generic */
-
-    STATIC WC_INLINE word32 rotlFixed(word32 x, word32 y)
-    {
-        return (x << y) | (x >> (sizeof(y) * 8 - y));
-    }
-
-
-    STATIC WC_INLINE word32 rotrFixed(word32 x, word32 y)
-    {
-        return (x >> y) | (x << (sizeof(y) * 8 - y));
-    }
-
-#endif
-
-
-STATIC WC_INLINE word32 ByteReverseWord32(word32 value)
-{
-#ifdef PPC_INTRINSICS
-    /* PPC: load reverse indexed instruction */
-    return (word32)__lwbrx(&value,0);
-#elif defined(__ICCARM__)
-    return (word32)__REV(value);
-#elif defined(KEIL_INTRINSICS)
-    return (word32)__rev(value);
-#elif defined(WOLF_ALLOW_BUILTIN) && \
-        defined(__GNUC_PREREQ) && __GNUC_PREREQ(4, 3)
-    return (word32)__builtin_bswap32(value);
-#elif defined(FAST_ROTATE)
-    /* 5 instructions with rotate instruction, 9 without */
-    return (rotrFixed(value, 8U) & 0xff00ff00) |
-           (rotlFixed(value, 8U) & 0x00ff00ff);
-#else
-    /* 6 instructions with rotate instruction, 8 without */
-    value = ((value & 0xFF00FF00) >> 8) | ((value & 0x00FF00FF) << 8);
-    return rotlFixed(value, 16U);
-#endif
-}
-
-
-STATIC WC_INLINE void ByteReverseWords(word32* out, const word32* in,
-                                    word32 byteCount)
-{
-    word32 count = byteCount/(word32)sizeof(word32), i;
-
-    for (i = 0; i < count; i++)
-        out[i] = ByteReverseWord32(in[i]);
-
-}
-
-
-#ifdef WORD64_AVAILABLE
-
-
-STATIC WC_INLINE word64 rotlFixed64(word64 x, word64 y)
-{
-    return (x << y) | (x >> (sizeof(y) * 8 - y));
-}
-
-
-STATIC WC_INLINE word64 rotrFixed64(word64 x, word64 y)
-{
-    return (x >> y) | (x << (sizeof(y) * 8 - y));
-}
-
-
-STATIC WC_INLINE word64 ByteReverseWord64(word64 value)
-{
-#if defined(WOLF_ALLOW_BUILTIN) && defined(__GNUC_PREREQ) && __GNUC_PREREQ(4, 3)
-    return (word64)__builtin_bswap64(value);
-#elif defined(WOLFCRYPT_SLOW_WORD64)
-	return (word64)((word64)ByteReverseWord32((word32) value)) << 32 |
-                    (word64)ByteReverseWord32((word32)(value   >> 32));
-#else
-	value = ((value & W64LIT(0xFF00FF00FF00FF00)) >> 8) |
-            ((value & W64LIT(0x00FF00FF00FF00FF)) << 8);
-	value = ((value & W64LIT(0xFFFF0000FFFF0000)) >> 16) |
-            ((value & W64LIT(0x0000FFFF0000FFFF)) << 16);
-	return rotlFixed64(value, 32U);
-#endif
-}
-
-
-STATIC WC_INLINE void ByteReverseWords64(word64* out, const word64* in,
-                                      word32 byteCount)
-{
-    word32 count = byteCount/(word32)sizeof(word64), i;
-
-    for (i = 0; i < count; i++)
-        out[i] = ByteReverseWord64(in[i]);
-
-}
-
-#endif /* WORD64_AVAILABLE */
-
-
-STATIC WC_INLINE void XorWords(wolfssl_word* r, const wolfssl_word* a, word32 n)
-{
-    word32 i;
-
-    for (i = 0; i < n; i++) r[i] ^= a[i];
-}
-
-
-STATIC WC_INLINE void xorbuf(void* buf, const void* mask, word32 count)
-{
-    if (((wolfssl_word)buf | (wolfssl_word)mask | count) % WOLFSSL_WORD_SIZE == 0)
-        XorWords( (wolfssl_word*)buf,
-                  (const wolfssl_word*)mask, count / WOLFSSL_WORD_SIZE);
-    else {
-        word32 i;
-        byte*       b = (byte*)buf;
-        const byte* m = (const byte*)mask;
-
-        for (i = 0; i < count; i++) b[i] ^= m[i];
-    }
-}
-
-
-/* Make sure compiler doesn't skip */
-STATIC WC_INLINE void ForceZero(const void* mem, word32 len)
-{
-    volatile byte* z = (volatile byte*)mem;
-
-#if defined(WOLFSSL_X86_64_BUILD) && defined(WORD64_AVAILABLE)
-    volatile word64* w;
-    #ifndef WOLFSSL_UNALIGNED_64BIT_ACCESS
-        word32 l = (sizeof(word64) - ((size_t)z & (sizeof(word64)-1))) &
-                                                             (sizeof(word64)-1);
-
-        if (len < l) l = len;
-        len -= l;
-        while (l--) *z++ = 0;
-    #endif
-    for (w = (volatile word64*)z; len >= sizeof(*w); len -= sizeof(*w))
-        *w++ = 0;
-    z = (volatile byte*)w;
-#endif
-
-    while (len--) *z++ = 0;
-}
-
-
-/* check all length bytes for equality, return 0 on success */
-STATIC WC_INLINE int ConstantCompare(const byte* a, const byte* b, int length)
-{
-    int i;
-    int compareSum = 0;
-
-    for (i = 0; i < length; i++) {
-        compareSum |= a[i] ^ b[i];
-    }
-
-    return compareSum;
-}
-
-
-#ifndef WOLFSSL_HAVE_MIN
-    #define WOLFSSL_HAVE_MIN
-    #if defined(HAVE_FIPS) && !defined(min) /* so ifdef check passes */
-        #define min min
-    #endif
-    STATIC WC_INLINE word32 min(word32 a, word32 b)
-    {
-        return a > b ? b : a;
-    }
-#endif /* !WOLFSSL_HAVE_MIN */
-
-#ifndef WOLFSSL_HAVE_MAX
-    #define WOLFSSL_HAVE_MAX
-    #if defined(HAVE_FIPS) && !defined(max) /* so ifdef check passes */
-        #define max max
-    #endif
-    STATIC WC_INLINE word32 max(word32 a, word32 b)
-    {
-        return a > b ? a : b;
-    }
-#endif /* !WOLFSSL_HAVE_MAX */
-
-/* converts a 32 bit integer to 24 bit */
-STATIC WC_INLINE void c32to24(word32 in, word24 out)
-{
-    out[0] = (in >> 16) & 0xff;
-    out[1] = (in >>  8) & 0xff;
-    out[2] =  in & 0xff;
-}
-
-/* convert 16 bit integer to opaque */
-STATIC WC_INLINE void c16toa(word16 wc_u16, byte* c)
-{
-    c[0] = (wc_u16 >> 8) & 0xff;
-    c[1] =  wc_u16 & 0xff;
-}
-
-/* convert 32 bit integer to opaque */
-STATIC WC_INLINE void c32toa(word32 wc_u32, byte* c)
-{
-    c[0] = (wc_u32 >> 24) & 0xff;
-    c[1] = (wc_u32 >> 16) & 0xff;
-    c[2] = (wc_u32 >>  8) & 0xff;
-    c[3] =  wc_u32 & 0xff;
-}
-
-/* convert a 24 bit integer into a 32 bit one */
-STATIC WC_INLINE void c24to32(const word24 wc_u24, word32* wc_u32)
-{
-    *wc_u32 = (wc_u24[0] << 16) | (wc_u24[1] << 8) | wc_u24[2];
-}
-
-
-/* convert opaque to 24 bit integer */
-STATIC WC_INLINE void ato24(const byte* c, word32* wc_u24)
-{
-    *wc_u24 = (c[0] << 16) | (c[1] << 8) | c[2];
-}
-
-/* convert opaque to 16 bit integer */
-STATIC WC_INLINE void ato16(const byte* c, word16* wc_u16)
-{
-    *wc_u16 = (word16) ((c[0] << 8) | (c[1]));
-}
-
-/* convert opaque to 32 bit integer */
-STATIC WC_INLINE void ato32(const byte* c, word32* wc_u32)
-{
-    *wc_u32 = ((word32)c[0] << 24) | (c[1] << 16) | (c[2] << 8) | c[3];
-}
-
-
-STATIC WC_INLINE word32 btoi(byte b)
-{
-    return (word32)(b - 0x30);
-}
-
-
-/* Constant time - mask set when a > b. */
-STATIC WC_INLINE byte ctMaskGT(int a, int b)
-{
-    return (((word32)a - b - 1) >> 31) - 1;
-}
-
-/* Constant time - mask set when a >= b. */
-STATIC WC_INLINE byte ctMaskGTE(int a, int b)
-{
-    return (((word32)a - b    ) >> 31) - 1;
-}
-
-/* Constant time - mask set when a < b. */
-STATIC WC_INLINE byte ctMaskLT(int a, int b)
-{
-    return (((word32)b - a - 1) >> 31) - 1;
-}
-
-/* Constant time - mask set when a <= b. */
-STATIC WC_INLINE byte ctMaskLTE(int a, int b)
-{
-    return (((word32)b - a    ) >> 31) - 1;
-}
-
-/* Constant time - mask set when a == b. */
-STATIC WC_INLINE byte ctMaskEq(int a, int b)
-{
-    return 0 - (a == b);
-}
-
-/* Constant time - select b when mask is set and a otherwise. */
-STATIC WC_INLINE byte ctMaskSel(byte m, byte a, byte b)
-{
-    return (a & ((byte)~(word32)m)) | (b & m);
-}
-
-/* Constant time - bit set when a <= b. */
-STATIC WC_INLINE byte ctSetLTE(int a, int b)
-{
-    return ((word32)a - b - 1) >> 31;
-}
-
-
-#undef STATIC
-
-#endif /* !WOLFSSL_MISC_INCLUDED && !NO_INLINE */
-
-#endif /* WOLF_CRYPT_MISC_C */
-