Diff: wolfcrypt/src/curve25519.c

Revision:

17:ff9d1e86ad5f

Parent:

16:048e5e270a58

--- a/wolfcrypt/src/curve25519.c	Tue Nov 19 14:32:16 2019 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,456 +0,0 @@
-/* curve25519.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
- */
-
-
- /* Based On Daniel J Bernstein's curve25519 Public Domain ref10 work. */
-
-
-#ifdef HAVE_CONFIG_H
-    #include <config.h>
-#endif
-
-#include <wolfssl/wolfcrypt/settings.h>
-
-#ifdef HAVE_CURVE25519
-
-#include <wolfssl/wolfcrypt/curve25519.h>
-#include <wolfssl/wolfcrypt/error-crypt.h>
-#ifdef NO_INLINE
-    #include <wolfssl/wolfcrypt/misc.h>
-#else
-    #define WOLFSSL_MISC_INCLUDED
-    #include <wolfcrypt/src/misc.c>
-#endif
-
-#if defined(FREESCALE_LTC_ECC)
-    #include <wolfssl/wolfcrypt/port/nxp/ksdk_port.h>
-#endif
-
-const curve25519_set_type curve25519_sets[] = {
-    {
-        CURVE25519_KEYSIZE,
-        "CURVE25519",
-    }
-};
-
-int wc_curve25519_make_key(WC_RNG* rng, int keysize, curve25519_key* key)
-{
-#ifdef FREESCALE_LTC_ECC
-    const ECPoint* basepoint = wc_curve25519_GetBasePoint();
-#else
-    unsigned char basepoint[CURVE25519_KEYSIZE] = {9};
-#endif
-    int  ret;
-
-    if (key == NULL || rng == NULL)
-        return BAD_FUNC_ARG;
-
-    /* currently only a key size of 32 bytes is used */
-    if (keysize != CURVE25519_KEYSIZE)
-        return ECC_BAD_ARG_E;
-
-#ifndef FREESCALE_LTC_ECC
-    fe_init();
-#endif
-
-    /* random number for private key */
-    ret = wc_RNG_GenerateBlock(rng, key->k.point, keysize);
-    if (ret != 0)
-        return ret;
-
-    /* Clamp the private key */
-    key->k.point[0] &= 248;
-    key->k.point[CURVE25519_KEYSIZE-1] &= 63; /* same &=127 because |=64 after */
-    key->k.point[CURVE25519_KEYSIZE-1] |= 64;
-
-    /* compute public key */
-    #ifdef FREESCALE_LTC_ECC
-        ret = wc_curve25519(&key->p, key->k.point, basepoint, kLTC_Weierstrass); /* input basepoint on Weierstrass curve */
-    #else
-        ret = curve25519(key->p.point, key->k.point, basepoint);
-    #endif
-    if (ret != 0) {
-        ForceZero(key->k.point, keysize);
-        ForceZero(key->p.point, keysize);
-        return ret;
-    }
-
-    return ret;
-}
-
-#ifdef HAVE_CURVE25519_SHARED_SECRET
-
-int wc_curve25519_shared_secret(curve25519_key* private_key,
-                                curve25519_key* public_key,
-                                byte* out, word32* outlen)
-{
-    return wc_curve25519_shared_secret_ex(private_key, public_key,
-                                          out, outlen, EC25519_BIG_ENDIAN);
-}
-
-int wc_curve25519_shared_secret_ex(curve25519_key* private_key,
-                                   curve25519_key* public_key,
-                                   byte* out, word32* outlen, int endian)
-{
-    #ifdef FREESCALE_LTC_ECC
-        ECPoint o = {{0}};
-    #else
-        unsigned char o[CURVE25519_KEYSIZE];
-    #endif
-    int ret = 0;
-
-    /* sanity check */
-    if (private_key == NULL || public_key == NULL ||
-        out == NULL || outlen == NULL || *outlen < CURVE25519_KEYSIZE)
-        return BAD_FUNC_ARG;
-
-    /* avoid implementation fingerprinting */
-    if (public_key->p.point[CURVE25519_KEYSIZE-1] > 0x7F)
-        return ECC_BAD_ARG_E;
-
-    #ifdef FREESCALE_LTC_ECC
-        ret = wc_curve25519(&o, private_key->k.point, &public_key->p, kLTC_Curve25519 /* input point P on Curve25519 */);
-    #else
-        ret = curve25519(o, private_key->k.point, public_key->p.point);
-    #endif
-    if (ret != 0) {
-        #ifdef FREESCALE_LTC_ECC
-            ForceZero(o.point, CURVE25519_KEYSIZE);
-            ForceZero(o.pointY, CURVE25519_KEYSIZE);
-        #else
-            ForceZero(o, CURVE25519_KEYSIZE);
-        #endif
-        return ret;
-    }
-
-    if (endian == EC25519_BIG_ENDIAN) {
-        int i;
-        /* put shared secret key in Big Endian format */
-        for (i = 0; i < CURVE25519_KEYSIZE; i++)
-            #ifdef FREESCALE_LTC_ECC
-                out[i] = o.point[CURVE25519_KEYSIZE - i -1];
-            #else
-                out[i] = o[CURVE25519_KEYSIZE - i -1];
-            #endif
-    }
-    else /* put shared secret key in Little Endian format */
-        #ifdef FREESCALE_LTC_ECC
-            XMEMCPY(out, o.point, CURVE25519_KEYSIZE);
-        #else
-            XMEMCPY(out, o, CURVE25519_KEYSIZE);
-        #endif
-
-    *outlen = CURVE25519_KEYSIZE;
-
-    #ifdef FREESCALE_LTC_ECC
-        ForceZero(o.point, CURVE25519_KEYSIZE);
-        ForceZero(o.pointY, CURVE25519_KEYSIZE);
-    #else
-        ForceZero(o, CURVE25519_KEYSIZE);
-    #endif
-
-    return ret;
-}
-
-#endif /* HAVE_CURVE25519_SHARED_SECRET */
-
-#ifdef HAVE_CURVE25519_KEY_EXPORT
-
-/* export curve25519 public key (Big endian)
- * return 0 on success */
-int wc_curve25519_export_public(curve25519_key* key, byte* out, word32* outLen)
-{
-    return wc_curve25519_export_public_ex(key, out, outLen, EC25519_BIG_ENDIAN);
-}
-
-/* export curve25519 public key (Big or Little endian)
- * return 0 on success */
-int wc_curve25519_export_public_ex(curve25519_key* key, byte* out,
-                                   word32* outLen, int endian)
-{
-    if (key == NULL || out == NULL || outLen == NULL)
-        return BAD_FUNC_ARG;
-
-    /* check and set outgoing key size */
-    if (*outLen < CURVE25519_KEYSIZE) {
-        *outLen = CURVE25519_KEYSIZE;
-        return ECC_BAD_ARG_E;
-    }
-    *outLen = CURVE25519_KEYSIZE;
-
-    if (endian == EC25519_BIG_ENDIAN) {
-        int i;
-
-        /* read keys in Big Endian format */
-        for (i = 0; i < CURVE25519_KEYSIZE; i++)
-            out[i] = key->p.point[CURVE25519_KEYSIZE - i - 1];
-    }
-    else
-        XMEMCPY(out, key->p.point, CURVE25519_KEYSIZE);
-
-    return 0;
-}
-
-#endif /* HAVE_CURVE25519_KEY_EXPORT */
-
-#ifdef HAVE_CURVE25519_KEY_IMPORT
-
-/* import curve25519 public key (Big endian)
- *  return 0 on success */
-int wc_curve25519_import_public(const byte* in, word32 inLen,
-                                curve25519_key* key)
-{
-    return wc_curve25519_import_public_ex(in, inLen, key, EC25519_BIG_ENDIAN);
-}
-
-/* import curve25519 public key (Big or Little endian)
- * return 0 on success */
-int wc_curve25519_import_public_ex(const byte* in, word32 inLen,
-                                curve25519_key* key, int endian)
-{
-    /* sanity check */
-    if (key == NULL || in == NULL)
-        return BAD_FUNC_ARG;
-
-    /* check size of incoming keys */
-    if (inLen != CURVE25519_KEYSIZE)
-       return ECC_BAD_ARG_E;
-
-    if (endian == EC25519_BIG_ENDIAN) {
-        int i;
-
-        /* read keys in Big Endian format */
-        for (i = 0; i < CURVE25519_KEYSIZE; i++)
-            key->p.point[i] = in[CURVE25519_KEYSIZE - i - 1];
-    }
-    else
-        XMEMCPY(key->p.point, in, inLen);
-
-    key->dp = &curve25519_sets[0];
-
-    /* LTC needs also Y coordinate - let's compute it */
-    #ifdef FREESCALE_LTC_ECC
-        ltc_pkha_ecc_point_t ltcPoint;
-        ltcPoint.X = &key->p.point[0];
-        ltcPoint.Y = &key->p.pointY[0];
-        LTC_PKHA_Curve25519ComputeY(&ltcPoint);
-    #endif
-
-    return 0;
-}
-
-#endif /* HAVE_CURVE25519_KEY_IMPORT */
-
-
-#ifdef HAVE_CURVE25519_KEY_EXPORT
-
-/* export curve25519 private key only raw (Big endian)
- * outLen is in/out size
- * return 0 on success */
-int wc_curve25519_export_private_raw(curve25519_key* key, byte* out,
-                                     word32* outLen)
-{
-    return wc_curve25519_export_private_raw_ex(key, out, outLen,
-                                               EC25519_BIG_ENDIAN);
-}
-
-/* export curve25519 private key only raw (Big or Little endian)
- * outLen is in/out size
- * return 0 on success */
-int wc_curve25519_export_private_raw_ex(curve25519_key* key, byte* out,
-                                        word32* outLen, int endian)
-{
-    /* sanity check */
-    if (key == NULL || out == NULL || outLen == NULL)
-        return BAD_FUNC_ARG;
-
-    /* check size of outgoing buffer */
-    if (*outLen < CURVE25519_KEYSIZE) {
-        *outLen = CURVE25519_KEYSIZE;
-        return ECC_BAD_ARG_E;
-    }
-    *outLen = CURVE25519_KEYSIZE;
-
-    if (endian == EC25519_BIG_ENDIAN) {
-        int i;
-
-        /* put the key in Big Endian format */
-        for (i = 0; i < CURVE25519_KEYSIZE; i++)
-            out[i] = key->k.point[CURVE25519_KEYSIZE - i - 1];
-    }
-    else
-        XMEMCPY(out, key->k.point, CURVE25519_KEYSIZE);
-
-    return 0;
-}
-
-/* curve25519 key pair export (Big or Little endian)
- * return 0 on success */
-int wc_curve25519_export_key_raw(curve25519_key* key,
-                                 byte* priv, word32 *privSz,
-                                 byte* pub, word32 *pubSz)
-{
-    return wc_curve25519_export_key_raw_ex(key, priv, privSz,
-                                           pub, pubSz, EC25519_BIG_ENDIAN);
-}
-
-/* curve25519 key pair export (Big or Little endian)
- * return 0 on success */
-int wc_curve25519_export_key_raw_ex(curve25519_key* key,
-                                    byte* priv, word32 *privSz,
-                                    byte* pub, word32 *pubSz,
-                                    int endian)
-{
-    int ret;
-
-    /* export private part */
-    ret = wc_curve25519_export_private_raw_ex(key, priv, privSz, endian);
-    if (ret != 0)
-        return ret;
-
-    /* export public part */
-    return wc_curve25519_export_public_ex(key, pub, pubSz, endian);
-}
-
-#endif /* HAVE_CURVE25519_KEY_EXPORT */
-
-#ifdef HAVE_CURVE25519_KEY_IMPORT
-
-/* curve25519 private key import (Big endian)
- * Public key to match private key needs to be imported too
- * return 0 on success */
-int wc_curve25519_import_private_raw(const byte* priv, word32 privSz,
-                                     const byte* pub, word32 pubSz,
-                                     curve25519_key* key)
-{
-    return wc_curve25519_import_private_raw_ex(priv, privSz, pub, pubSz,
-                                               key, EC25519_BIG_ENDIAN);
-}
-
-/* curve25519 private key import (Big or Little endian)
- * Public key to match private key needs to be imported too
- * return 0 on success */
-int wc_curve25519_import_private_raw_ex(const byte* priv, word32 privSz,
-                                        const byte* pub, word32 pubSz,
-                                        curve25519_key* key, int endian)
-{
-    int ret;
-
-    /* import private part */
-    ret = wc_curve25519_import_private_ex(priv, privSz, key, endian);
-    if (ret != 0)
-        return ret;
-
-    /* import public part */
-    return wc_curve25519_import_public_ex(pub, pubSz, key, endian);
-}
-
-/* curve25519 private key import only. (Big endian)
- * return 0 on success */
-int wc_curve25519_import_private(const byte* priv, word32 privSz,
-                                 curve25519_key* key)
-{
-    return wc_curve25519_import_private_ex(priv, privSz,
-                                           key, EC25519_BIG_ENDIAN);
-}
-
-/* curve25519 private key import only. (Big or Little endian)
- * return 0 on success */
-int wc_curve25519_import_private_ex(const byte* priv, word32 privSz,
-                                    curve25519_key* key, int endian)
-{
-    /* sanity check */
-    if (key == NULL || priv == NULL)
-        return BAD_FUNC_ARG;
-
-    /* check size of incoming keys */
-    if ((int)privSz != CURVE25519_KEYSIZE)
-        return ECC_BAD_ARG_E;
-
-    if (endian == EC25519_BIG_ENDIAN) {
-        int i;
-
-        /* read the key in Big Endian format */
-        for (i = 0; i < CURVE25519_KEYSIZE; i++)
-            key->k.point[i] = priv[CURVE25519_KEYSIZE - i - 1];
-    }
-    else
-        XMEMCPY(key->k.point, priv, CURVE25519_KEYSIZE);
-
-    key->dp = &curve25519_sets[0];
-
-    /* Clamp the key */
-    key->k.point[0] &= 248;
-    key->k.point[privSz-1] &= 63; /* same &=127 because |=64 after */
-    key->k.point[privSz-1] |= 64;
-
-    return 0;
-}
-
-#endif /* HAVE_CURVE25519_KEY_IMPORT */
-
-
-int wc_curve25519_init(curve25519_key* key)
-{
-    if (key == NULL)
-       return BAD_FUNC_ARG;
-
-    XMEMSET(key, 0, sizeof(*key));
-
-    /* currently the format for curve25519 */
-    key->dp = &curve25519_sets[0];
-
-#ifndef FREESCALE_LTC_ECC
-    fe_init();
-#endif
-
-    return 0;
-}
-
-
-/* Clean the memory of a key */
-void wc_curve25519_free(curve25519_key* key)
-{
-   if (key == NULL)
-       return;
-
-   key->dp = NULL;
-   ForceZero(key->p.point, sizeof(key->p.point));
-   ForceZero(key->k.point, sizeof(key->k.point));
-   #ifdef FREESCALE_LTC_ECC
-       ForceZero(key->p.point, sizeof(key->p.pointY));
-       ForceZero(key->k.point, sizeof(key->k.pointY));
-   #endif
-}
-
-
-/* get key size */
-int wc_curve25519_size(curve25519_key* key)
-{
-    if (key == NULL)
-        return 0;
-
-    return key->dp->size;
-}
-
-#endif /*HAVE_CURVE25519*/
-
-