Diff: wolfcrypt/src/wolfmath.c

Revision:

17:ff9d1e86ad5f

Parent:

16:048e5e270a58

--- a/wolfcrypt/src/wolfmath.c	Tue Nov 19 14:32:16 2019 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,306 +0,0 @@
-/* wolfmath.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
- */
-
-
-/* common functions for either math library */
-
-#ifdef HAVE_CONFIG_H
-    #include <config.h>
-#endif
-
-/* in case user set USE_FAST_MATH there */
-#include <wolfssl/wolfcrypt/settings.h>
-
-#ifdef USE_FAST_MATH
-    #include <wolfssl/wolfcrypt/tfm.h>
-#else
-    #include <wolfssl/wolfcrypt/integer.h>
-#endif
-
-#include <wolfssl/wolfcrypt/error-crypt.h>
-#include <wolfssl/wolfcrypt/logging.h>
-
-#if defined(USE_FAST_MATH) || !defined(NO_BIG_INT)
-
-#ifdef WOLFSSL_ASYNC_CRYPT
-    #include <wolfssl/wolfcrypt/async.h>
-#endif
-
-#ifdef NO_INLINE
-    #include <wolfssl/wolfcrypt/misc.h>
-#else
-    #define WOLFSSL_MISC_INCLUDED
-    #include <wolfcrypt/src/misc.c>
-#endif
-
-
-#if !defined(WC_NO_CACHE_RESISTANT) && \
-    ((defined(HAVE_ECC) && defined(ECC_TIMING_RESISTANT)) || \
-     (defined(USE_FAST_MATH) && defined(TFM_TIMING_RESISTANT)))
-
-    /* all off / all on pointer addresses for constant calculations */
-    /* ecc.c uses same table */
-    const wolfssl_word wc_off_on_addr[2] =
-    {
-    #if defined(WC_64BIT_CPU)
-        W64LIT(0x0000000000000000),
-        W64LIT(0xffffffffffffffff)
-    #elif defined(WC_16BIT_CPU)
-        0x0000U,
-        0xffffU
-    #else
-        /* 32 bit */
-        0x00000000U,
-        0xffffffffU
-    #endif
-    };
-#endif
-
-
-int get_digit_count(mp_int* a)
-{
-    if (a == NULL)
-        return 0;
-
-    return a->used;
-}
-
-mp_digit get_digit(mp_int* a, int n)
-{
-    if (a == NULL)
-        return 0;
-
-    return (n >= a->used || n < 0) ? 0 : a->dp[n];
-}
-
-int get_rand_digit(WC_RNG* rng, mp_digit* d)
-{
-    return wc_RNG_GenerateBlock(rng, (byte*)d, sizeof(mp_digit));
-}
-
-#ifdef WC_RSA_BLINDING
-int mp_rand(mp_int* a, int digits, WC_RNG* rng)
-{
-    int ret = 0;
-    DECLARE_VAR(d, mp_digit, 1, rng->heap);
-
-    if (rng == NULL) {
-        ret = MISSING_RNG_E; goto exit;
-    }
-
-    if (a == NULL
-    #ifdef WOLFSSL_ASYNC_CRYPT
-        || d == NULL
-    #endif
-    ) {
-        ret = BAD_FUNC_ARG; goto exit;
-    }
-
-    mp_zero(a);
-    if (digits <= 0) {
-        ret = MP_OKAY; goto exit;
-    }
-
-    /* first place a random non-zero digit */
-    do {
-        ret = get_rand_digit(rng, d);
-        if (ret != 0) {
-            goto exit;
-        }
-    } while (*d == 0);
-
-    if ((ret = mp_add_d(a, *d, a)) != MP_OKAY) {
-        goto exit;
-    }
-
-    while (--digits > 0) {
-        if ((ret = mp_lshd(a, 1)) != MP_OKAY) {
-            goto exit;
-        }
-        if ((ret = get_rand_digit(rng, d)) != 0) {
-            goto exit;
-        }
-        if ((ret = mp_add_d(a, *d, a)) != MP_OKAY) {
-            goto exit;
-        }
-    }
-
-exit:
-    FREE_VAR(d, rng->heap);
-
-    return ret;
-}
-#endif /* WC_RSA_BLINDING */
-
-
-#ifdef HAVE_WOLF_BIGINT
-void wc_bigint_init(WC_BIGINT* a)
-{
-    if (a != NULL) {
-        a->buf = NULL;
-        a->len = 0;
-        a->heap = NULL;
-    }
-}
-
-int wc_bigint_alloc(WC_BIGINT* a, word32 sz)
-{
-    int err = MP_OKAY;
-
-    if (a == NULL)
-        return BAD_FUNC_ARG;
-
-    if (sz > 0) {
-        if (a->buf && sz > a->len) {
-            wc_bigint_free(a);
-        }
-        if (a->buf == NULL) {
-            a->buf = (byte*)XMALLOC(sz, a->heap, DYNAMIC_TYPE_WOLF_BIGINT);
-        }
-        if (a->buf == NULL) {
-            err = MP_MEM;
-        }
-        else {
-            XMEMSET(a->buf, 0, sz);
-        }
-    }
-    a->len = sz;
-
-    return err;
-}
-
-/* assumes input is big endian format */
-int wc_bigint_from_unsigned_bin(WC_BIGINT* a, const byte* in, word32 inlen)
-{
-    int err;
-
-    if (a == NULL || in == NULL || inlen == 0)
-        return BAD_FUNC_ARG;
-
-    err = wc_bigint_alloc(a, inlen);
-    if (err == 0) {
-        XMEMCPY(a->buf, in, inlen);
-    }
-
-    return err;
-}
-
-int wc_bigint_to_unsigned_bin(WC_BIGINT* a, byte* out, word32* outlen)
-{
-    word32 sz;
-
-    if (a == NULL || out == NULL || outlen == NULL || *outlen == 0)
-        return BAD_FUNC_ARG;
-
-    /* trim to fit into output buffer */
-    sz = a->len;
-    if (a->len > *outlen) {
-        WOLFSSL_MSG("wc_bigint_export: Truncating output");
-        sz = *outlen;
-    }
-
-    if (a->buf) {
-        XMEMCPY(out, a->buf, sz);
-    }
-
-    *outlen = sz;
-
-    return MP_OKAY;
-}
-
-void wc_bigint_zero(WC_BIGINT* a)
-{
-    if (a && a->buf) {
-        ForceZero(a->buf, a->len);
-    }
-}
-
-void wc_bigint_free(WC_BIGINT* a)
-{
-    if (a) {
-        if (a->buf) {
-          XFREE(a->buf, a->heap, DYNAMIC_TYPE_WOLF_BIGINT);
-        }
-        a->buf = NULL;
-        a->len = 0;
-    }
-}
-
-/* sz: make sure the buffer is at least that size and zero padded.
- *     A `sz == 0` will use the size of `src`.
- *     The calulcates sz is stored into dst->len in `wc_bigint_alloc`.
- */
-int wc_mp_to_bigint_sz(mp_int* src, WC_BIGINT* dst, word32 sz)
-{
-    int err;
-    word32 x, y;
-
-    if (src == NULL || dst == NULL)
-        return BAD_FUNC_ARG;
-
-    /* get size of source */
-    x = mp_unsigned_bin_size(src);
-    if (sz < x)
-        sz = x;
-
-    /* make sure destination is allocated and large enough */
-    err = wc_bigint_alloc(dst, sz);
-    if (err == MP_OKAY) {
-
-        /* leading zero pad */
-        y = sz - x;
-        XMEMSET(dst->buf, 0, y);
-
-        /* export src as unsigned bin to destination buf */
-        err = mp_to_unsigned_bin(src, dst->buf + y);
-    }
-
-    return err;
-}
-
-int wc_mp_to_bigint(mp_int* src, WC_BIGINT* dst)
-{
-    if (src == NULL || dst == NULL)
-        return BAD_FUNC_ARG;
-
-    return wc_mp_to_bigint_sz(src, dst, 0);
-}
-
-int wc_bigint_to_mp(WC_BIGINT* src, mp_int* dst)
-{
-    int err;
-
-    if (src == NULL || dst == NULL)
-        return BAD_FUNC_ARG;
-
-    if (src->buf == NULL)
-        return BAD_FUNC_ARG;
-
-    err = mp_read_unsigned_bin(dst, src->buf, src->len);
-    wc_bigint_free(src);
-
-    return err;
-}
-
-#endif /* HAVE_WOLF_BIGINT */
-
-#endif /* USE_FAST_MATH || !NO_BIG_INT */
-