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sm4.c
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/* sm4.c
*
* Copyright (C) 2006-2024 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
*/
/* For more info on the algorithm, see:
* https://datatracker.ietf.org/doc/html/draft-ribose-cfrg-sm4
*/
#include <wolfssl/wolfcrypt/libwolfssl_sources.h>
#ifdef WOLFSSL_SM4
#include <wolfssl/wolfcrypt/sm4.h>
#ifdef NO_INLINE
#include <wolfssl/wolfcrypt/misc.h>
#else
#define WOLFSSL_MISC_INCLUDED
#include <wolfcrypt/src/misc.c>
#endif
#ifdef LITTLE_ENDIAN_ORDER
/* Load unsigned 32-bit word from big-endian byte array.
*
* @param [in] b Byte array with big-endian data.
* @return Unsigned 32-bit word.
*/
#define LOAD_U32_BE(b, v0, v1, v2, v3) \
XMEMCPY(&v0, b + 0, sizeof(v0)); \
XMEMCPY(&v1, b + 4, sizeof(v1)); \
XMEMCPY(&v2, b + 8, sizeof(v2)); \
XMEMCPY(&v3, b + 12, sizeof(v3)); \
v0 = ByteReverseWord32(v0); \
v1 = ByteReverseWord32(v1); \
v2 = ByteReverseWord32(v2); \
v3 = ByteReverseWord32(v3)
/* Store unsigned 32-bit word as big-endian byte array.
*
* @param [in] v Unsigned 32-bit value.
* @param [out] b Byte array to hold big-endian data.
*/
#define STORE_U32_BE(v0, v1, v2, v3, b) \
v0 = ByteReverseWord32(v0); \
v1 = ByteReverseWord32(v1); \
v2 = ByteReverseWord32(v2); \
v3 = ByteReverseWord32(v3); \
XMEMCPY(b + 0, &v3, sizeof(v3)); \
XMEMCPY(b + 4, &v2, sizeof(v2)); \
XMEMCPY(b + 8, &v1, sizeof(v1)); \
XMEMCPY(b + 12, &v0, sizeof(v0))
#else
/* Load unsigned 32-bit word from big-endian byte array.
*
* @param [in] b Byte array with big-endian data.
* @return Unsigned 32-bit word.
*/
#define LOAD_U32_BE(b, v0, v1, v2, v3) \
XMEMCPY(&v0, b + 0, sizeof(v0)); \
XMEMCPY(&v1, b + 4, sizeof(v1)); \
XMEMCPY(&v2, b + 8, sizeof(v2)); \
XMEMCPY(&v3, b + 12, sizeof(v3))
/* Store unsigned 32-bit word as big-endian byte array.
*
* @param [in] v Unsigned 32-bit value.
* @param [out] b Byte array to hold big-endian data.
*/
#define STORE_U32_BE(v0, v1, v2, v3, b) \
XMEMCPY(b + 0, &v3, sizeof(v3)); \
XMEMCPY(b + 4, &v2, sizeof(v2)); \
XMEMCPY(b + 8, &v1, sizeof(v1)); \
XMEMCPY(b + 12, &v0, sizeof(v0))
#endif
/* Constant key values used in creating key schedule. */
static word32 sm4_ck[32] = {
0x00070E15, 0x1C232A31, 0x383F464D, 0x545B6269,
0x70777E85, 0x8C939AA1, 0xA8AFB6BD, 0xC4CBD2D9,
0xE0E7EEF5, 0xFC030A11, 0x181F262D, 0x343B4249,
0x50575E65, 0x6C737A81, 0x888F969D, 0xA4ABB2B9,
0xC0C7CED5, 0xDCE3EAF1, 0xF8FF060D, 0x141B2229,
0x30373E45, 0x4C535A61, 0x686F767D, 0x848B9299,
0xA0A7AEB5, 0xBCC3CAD1, 0xD8DFE6ED, 0xF4FB0209,
0x10171E25, 0x2C333A41, 0x484F565D, 0x646B7279
};
/* Family key values used in creating key schedule. */
static word32 sm4_fk[4] = {
0xA3B1BAC6, 0x56AA3350, 0x677D9197, 0xB27022DC
};
#if !defined(__aarch64__) || !defined(WOLFSSL_ARMASM_CRYPTO_SM4)
/* S-box used in nonlinear transformation tau. */
static byte sm4_sbox[256] = {
0xD6, 0x90, 0xE9, 0xFE, 0xCC, 0xE1, 0x3D, 0xB7,
0x16, 0xB6, 0x14, 0xC2, 0x28, 0xFB, 0x2C, 0x05,
0x2B, 0x67, 0x9A, 0x76, 0x2A, 0xBE, 0x04, 0xC3,
0xAA, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
0x9C, 0x42, 0x50, 0xF4, 0x91, 0xEF, 0x98, 0x7A,
0x33, 0x54, 0x0B, 0x43, 0xED, 0xCF, 0xAC, 0x62,
0xE4, 0xB3, 0x1C, 0xA9, 0xC9, 0x08, 0xE8, 0x95,
0x80, 0xDF, 0x94, 0xFA, 0x75, 0x8F, 0x3F, 0xA6,
0x47, 0x07, 0xA7, 0xFC, 0xF3, 0x73, 0x17, 0xBA,
0x83, 0x59, 0x3C, 0x19, 0xE6, 0x85, 0x4F, 0xA8,
0x68, 0x6B, 0x81, 0xB2, 0x71, 0x64, 0xDA, 0x8B,
0xF8, 0xEB, 0x0F, 0x4B, 0x70, 0x56, 0x9D, 0x35,
0x1E, 0x24, 0x0E, 0x5E, 0x63, 0x58, 0xD1, 0xA2,
0x25, 0x22, 0x7C, 0x3B, 0x01, 0x21, 0x78, 0x87,
0xD4, 0x00, 0x46, 0x57, 0x9F, 0xD3, 0x27, 0x52,
0x4C, 0x36, 0x02, 0xE7, 0xA0, 0xC4, 0xC8, 0x9E,
0xEA, 0xBF, 0x8A, 0xD2, 0x40, 0xC7, 0x38, 0xB5,
0xA3, 0xF7, 0xF2, 0xCE, 0xF9, 0x61, 0x15, 0xA1,
0xE0, 0xAE, 0x5D, 0xA4, 0x9B, 0x34, 0x1A, 0x55,
0xAD, 0x93, 0x32, 0x30, 0xF5, 0x8C, 0xB1, 0xE3,
0x1D, 0xF6, 0xE2, 0x2E, 0x82, 0x66, 0xCA, 0x60,
0xC0, 0x29, 0x23, 0xAB, 0x0D, 0x53, 0x4E, 0x6F,
0xD5, 0xDB, 0x37, 0x45, 0xDE, 0xFD, 0x8E, 0x2F,
0x03, 0xFF, 0x6A, 0x72, 0x6D, 0x6C, 0x5B, 0x51,
0x8D, 0x1B, 0xAF, 0x92, 0xBB, 0xDD, 0xBC, 0x7F,
0x11, 0xD9, 0x5C, 0x41, 0x1F, 0x10, 0x5A, 0xD8,
0x0A, 0xC1, 0x31, 0x88, 0xA5, 0xCD, 0x7B, 0xBD,
0x2D, 0x74, 0xD0, 0x12, 0xB8, 0xE5, 0xB4, 0xB0,
0x89, 0x69, 0x97, 0x4A, 0x0C, 0x96, 0x77, 0x7E,
0x65, 0xB9, 0xF1, 0x09, 0xC5, 0x6E, 0xC6, 0x84,
0x18, 0xF0, 0x7D, 0xEC, 0x3A, 0xDC, 0x4D, 0x20,
0x79, 0xEE, 0x5F, 0x3E, 0xD7, 0xCB, 0x39, 0x48
};
#ifndef WOLFSSL_SM4_SMALL
/* S-boxes used in nonlinear transformation tau.
* Linear transformation applied to each byte.
*
* Generated using script: ruby scripts/sm4/tables.rb
*/
static const word32 sm4_sbox_0[256] = {
0xd55b5b8e, 0x924242d0, 0xeaa7a74d, 0xfdfbfb06, 0xcf3333fc, 0xe2878765,
0x3df4f4c9, 0xb5dede6b, 0x1658584e, 0xb4dada6e, 0x14505044, 0xc10b0bca,
0x28a0a088, 0xf8efef17, 0x2cb0b09c, 0x05141411, 0x2bacac87, 0x669d9dfb,
0x986a6af2, 0x77d9d9ae, 0x2aa8a882, 0xbcfafa46, 0x04101014, 0xc00f0fcf,
0xa8aaaa02, 0x45111154, 0x134c4c5f, 0x269898be, 0x4825256d, 0x841a1a9e,
0x0618181e, 0x9b6666fd, 0x9e7272ec, 0x4309094a, 0x51414110, 0xf7d3d324,
0x934646d5, 0xecbfbf53, 0x9a6262f8, 0x7be9e992, 0x33ccccff, 0x55515104,
0x0b2c2c27, 0x420d0d4f, 0xeeb7b759, 0xcc3f3ff3, 0xaeb2b21c, 0x638989ea,
0xe7939374, 0xb1cece7f, 0x1c70706c, 0xaba6a60d, 0xca2727ed, 0x08202028,
0xeba3a348, 0x975656c1, 0x82020280, 0xdc7f7fa3, 0x965252c4, 0xf9ebeb12,
0x74d5d5a1, 0x8d3e3eb3, 0x3ffcfcc3, 0xa49a9a3e, 0x461d1d5b, 0x071c1c1b,
0xa59e9e3b, 0xfff3f30c, 0xf0cfcf3f, 0x72cdcdbf, 0x175c5c4b, 0xb8eaea52,
0x810e0e8f, 0x5865653d, 0x3cf0f0cc, 0x1964647d, 0xe59b9b7e, 0x87161691,
0x4e3d3d73, 0xaaa2a208, 0x69a1a1c8, 0x6aadadc7, 0x83060685, 0xb0caca7a,
0x70c5c5b5, 0x659191f4, 0xd96b6bb2, 0x892e2ea7, 0xfbe3e318, 0xe8afaf47,
0x0f3c3c33, 0x4a2d2d67, 0x71c1c1b0, 0x5759590e, 0x9f7676e9, 0x35d4d4e1,
0x1e787866, 0x249090b4, 0x0e383836, 0x5f797926, 0x628d8def, 0x59616138,
0xd2474795, 0xa08a8a2a, 0x259494b1, 0x228888aa, 0x7df1f18c, 0x3bececd7,
0x01040405, 0x218484a5, 0x79e1e198, 0x851e1e9b, 0xd7535384, 0x00000000,
0x4719195e, 0x565d5d0b, 0x9d7e7ee3, 0xd04f4f9f, 0x279c9cbb, 0x5349491a,
0x4d31317c, 0x36d8d8ee, 0x0208080a, 0xe49f9f7b, 0xa2828220, 0xc71313d4,
0xcb2323e8, 0x9c7a7ae6, 0xe9abab42, 0xbdfefe43, 0x882a2aa2, 0xd14b4b9a,
0x41010140, 0xc41f1fdb, 0x38e0e0d8, 0xb7d6d661, 0xa18e8e2f, 0xf4dfdf2b,
0xf1cbcb3a, 0xcd3b3bf6, 0xfae7e71d, 0x608585e5, 0x15545441, 0xa3868625,
0xe3838360, 0xacbaba16, 0x5c757529, 0xa6929234, 0x996e6ef7, 0x34d0d0e4,
0x1a686872, 0x54555501, 0xafb6b619, 0x914e4edf, 0x32c8c8fa, 0x30c0c0f0,
0xf6d7d721, 0x8e3232bc, 0xb3c6c675, 0xe08f8f6f, 0x1d747469, 0xf5dbdb2e,
0xe18b8b6a, 0x2eb8b896, 0x800a0a8a, 0x679999fe, 0xc92b2be2, 0x618181e0,
0xc30303c0, 0x29a4a48d, 0x238c8caf, 0xa9aeae07, 0x0d343439, 0x524d4d1f,
0x4f393976, 0x6ebdbdd3, 0xd6575781, 0xd86f6fb7, 0x37dcdceb, 0x44151551,
0xdd7b7ba6, 0xfef7f709, 0x8c3a3ab6, 0x2fbcbc93, 0x030c0c0f, 0xfcffff03,
0x6ba9a9c2, 0x73c9c9ba, 0x6cb5b5d9, 0x6db1b1dc, 0x5a6d6d37, 0x50454515,
0x8f3636b9, 0x1b6c6c77, 0xadbebe13, 0x904a4ada, 0xb9eeee57, 0xde7777a9,
0xbef2f24c, 0x7efdfd83, 0x11444455, 0xda6767bd, 0x5d71712c, 0x40050545,
0x1f7c7c63, 0x10404050, 0x5b696932, 0xdb6363b8, 0x0a282822, 0xc20707c5,
0x31c4c4f5, 0x8a2222a8, 0xa7969631, 0xce3737f9, 0x7aeded97, 0xbff6f649,
0x2db4b499, 0x75d1d1a4, 0xd3434390, 0x1248485a, 0xbae2e258, 0xe6979771,
0xb6d2d264, 0xb2c2c270, 0x8b2626ad, 0x68a5a5cd, 0x955e5ecb, 0x4b292962,
0x0c30303c, 0x945a5ace, 0x76ddddab, 0x7ff9f986, 0x649595f1, 0xbbe6e65d,
0xf2c7c735, 0x0924242d, 0xc61717d1, 0x6fb9b9d6, 0xc51b1bde, 0x86121294,
0x18606078, 0xf3c3c330, 0x7cf5f589, 0xefb3b35c, 0x3ae8e8d2, 0xdf7373ac,
0x4c353579, 0x208080a0, 0x78e5e59d, 0xedbbbb56, 0x5e7d7d23, 0x3ef8f8c6,
0xd45f5f8b, 0xc82f2fe7, 0x39e4e4dd, 0x49212168,
};
static const word32 sm4_sbox_1[256] = {
0x5b5b8ed5, 0x4242d092, 0xa7a74dea, 0xfbfb06fd, 0x3333fccf, 0x878765e2,
0xf4f4c93d, 0xdede6bb5, 0x58584e16, 0xdada6eb4, 0x50504414, 0x0b0bcac1,
0xa0a08828, 0xefef17f8, 0xb0b09c2c, 0x14141105, 0xacac872b, 0x9d9dfb66,
0x6a6af298, 0xd9d9ae77, 0xa8a8822a, 0xfafa46bc, 0x10101404, 0x0f0fcfc0,
0xaaaa02a8, 0x11115445, 0x4c4c5f13, 0x9898be26, 0x25256d48, 0x1a1a9e84,
0x18181e06, 0x6666fd9b, 0x7272ec9e, 0x09094a43, 0x41411051, 0xd3d324f7,
0x4646d593, 0xbfbf53ec, 0x6262f89a, 0xe9e9927b, 0xccccff33, 0x51510455,
0x2c2c270b, 0x0d0d4f42, 0xb7b759ee, 0x3f3ff3cc, 0xb2b21cae, 0x8989ea63,
0x939374e7, 0xcece7fb1, 0x70706c1c, 0xa6a60dab, 0x2727edca, 0x20202808,
0xa3a348eb, 0x5656c197, 0x02028082, 0x7f7fa3dc, 0x5252c496, 0xebeb12f9,
0xd5d5a174, 0x3e3eb38d, 0xfcfcc33f, 0x9a9a3ea4, 0x1d1d5b46, 0x1c1c1b07,
0x9e9e3ba5, 0xf3f30cff, 0xcfcf3ff0, 0xcdcdbf72, 0x5c5c4b17, 0xeaea52b8,
0x0e0e8f81, 0x65653d58, 0xf0f0cc3c, 0x64647d19, 0x9b9b7ee5, 0x16169187,
0x3d3d734e, 0xa2a208aa, 0xa1a1c869, 0xadadc76a, 0x06068583, 0xcaca7ab0,
0xc5c5b570, 0x9191f465, 0x6b6bb2d9, 0x2e2ea789, 0xe3e318fb, 0xafaf47e8,
0x3c3c330f, 0x2d2d674a, 0xc1c1b071, 0x59590e57, 0x7676e99f, 0xd4d4e135,
0x7878661e, 0x9090b424, 0x3838360e, 0x7979265f, 0x8d8def62, 0x61613859,
0x474795d2, 0x8a8a2aa0, 0x9494b125, 0x8888aa22, 0xf1f18c7d, 0xececd73b,
0x04040501, 0x8484a521, 0xe1e19879, 0x1e1e9b85, 0x535384d7, 0x00000000,
0x19195e47, 0x5d5d0b56, 0x7e7ee39d, 0x4f4f9fd0, 0x9c9cbb27, 0x49491a53,
0x31317c4d, 0xd8d8ee36, 0x08080a02, 0x9f9f7be4, 0x828220a2, 0x1313d4c7,
0x2323e8cb, 0x7a7ae69c, 0xabab42e9, 0xfefe43bd, 0x2a2aa288, 0x4b4b9ad1,
0x01014041, 0x1f1fdbc4, 0xe0e0d838, 0xd6d661b7, 0x8e8e2fa1, 0xdfdf2bf4,
0xcbcb3af1, 0x3b3bf6cd, 0xe7e71dfa, 0x8585e560, 0x54544115, 0x868625a3,
0x838360e3, 0xbaba16ac, 0x7575295c, 0x929234a6, 0x6e6ef799, 0xd0d0e434,
0x6868721a, 0x55550154, 0xb6b619af, 0x4e4edf91, 0xc8c8fa32, 0xc0c0f030,
0xd7d721f6, 0x3232bc8e, 0xc6c675b3, 0x8f8f6fe0, 0x7474691d, 0xdbdb2ef5,
0x8b8b6ae1, 0xb8b8962e, 0x0a0a8a80, 0x9999fe67, 0x2b2be2c9, 0x8181e061,
0x0303c0c3, 0xa4a48d29, 0x8c8caf23, 0xaeae07a9, 0x3434390d, 0x4d4d1f52,
0x3939764f, 0xbdbdd36e, 0x575781d6, 0x6f6fb7d8, 0xdcdceb37, 0x15155144,
0x7b7ba6dd, 0xf7f709fe, 0x3a3ab68c, 0xbcbc932f, 0x0c0c0f03, 0xffff03fc,
0xa9a9c26b, 0xc9c9ba73, 0xb5b5d96c, 0xb1b1dc6d, 0x6d6d375a, 0x45451550,
0x3636b98f, 0x6c6c771b, 0xbebe13ad, 0x4a4ada90, 0xeeee57b9, 0x7777a9de,
0xf2f24cbe, 0xfdfd837e, 0x44445511, 0x6767bdda, 0x71712c5d, 0x05054540,
0x7c7c631f, 0x40405010, 0x6969325b, 0x6363b8db, 0x2828220a, 0x0707c5c2,
0xc4c4f531, 0x2222a88a, 0x969631a7, 0x3737f9ce, 0xeded977a, 0xf6f649bf,
0xb4b4992d, 0xd1d1a475, 0x434390d3, 0x48485a12, 0xe2e258ba, 0x979771e6,
0xd2d264b6, 0xc2c270b2, 0x2626ad8b, 0xa5a5cd68, 0x5e5ecb95, 0x2929624b,
0x30303c0c, 0x5a5ace94, 0xddddab76, 0xf9f9867f, 0x9595f164, 0xe6e65dbb,
0xc7c735f2, 0x24242d09, 0x1717d1c6, 0xb9b9d66f, 0x1b1bdec5, 0x12129486,
0x60607818, 0xc3c330f3, 0xf5f5897c, 0xb3b35cef, 0xe8e8d23a, 0x7373acdf,
0x3535794c, 0x8080a020, 0xe5e59d78, 0xbbbb56ed, 0x7d7d235e, 0xf8f8c63e,
0x5f5f8bd4, 0x2f2fe7c8, 0xe4e4dd39, 0x21216849,
};
static const word32 sm4_sbox_2[256] = {
0x5b8ed55b, 0x42d09242, 0xa74deaa7, 0xfb06fdfb, 0x33fccf33, 0x8765e287,
0xf4c93df4, 0xde6bb5de, 0x584e1658, 0xda6eb4da, 0x50441450, 0x0bcac10b,
0xa08828a0, 0xef17f8ef, 0xb09c2cb0, 0x14110514, 0xac872bac, 0x9dfb669d,
0x6af2986a, 0xd9ae77d9, 0xa8822aa8, 0xfa46bcfa, 0x10140410, 0x0fcfc00f,
0xaa02a8aa, 0x11544511, 0x4c5f134c, 0x98be2698, 0x256d4825, 0x1a9e841a,
0x181e0618, 0x66fd9b66, 0x72ec9e72, 0x094a4309, 0x41105141, 0xd324f7d3,
0x46d59346, 0xbf53ecbf, 0x62f89a62, 0xe9927be9, 0xccff33cc, 0x51045551,
0x2c270b2c, 0x0d4f420d, 0xb759eeb7, 0x3ff3cc3f, 0xb21caeb2, 0x89ea6389,
0x9374e793, 0xce7fb1ce, 0x706c1c70, 0xa60daba6, 0x27edca27, 0x20280820,
0xa348eba3, 0x56c19756, 0x02808202, 0x7fa3dc7f, 0x52c49652, 0xeb12f9eb,
0xd5a174d5, 0x3eb38d3e, 0xfcc33ffc, 0x9a3ea49a, 0x1d5b461d, 0x1c1b071c,
0x9e3ba59e, 0xf30cfff3, 0xcf3ff0cf, 0xcdbf72cd, 0x5c4b175c, 0xea52b8ea,
0x0e8f810e, 0x653d5865, 0xf0cc3cf0, 0x647d1964, 0x9b7ee59b, 0x16918716,
0x3d734e3d, 0xa208aaa2, 0xa1c869a1, 0xadc76aad, 0x06858306, 0xca7ab0ca,
0xc5b570c5, 0x91f46591, 0x6bb2d96b, 0x2ea7892e, 0xe318fbe3, 0xaf47e8af,
0x3c330f3c, 0x2d674a2d, 0xc1b071c1, 0x590e5759, 0x76e99f76, 0xd4e135d4,
0x78661e78, 0x90b42490, 0x38360e38, 0x79265f79, 0x8def628d, 0x61385961,
0x4795d247, 0x8a2aa08a, 0x94b12594, 0x88aa2288, 0xf18c7df1, 0xecd73bec,
0x04050104, 0x84a52184, 0xe19879e1, 0x1e9b851e, 0x5384d753, 0x00000000,
0x195e4719, 0x5d0b565d, 0x7ee39d7e, 0x4f9fd04f, 0x9cbb279c, 0x491a5349,
0x317c4d31, 0xd8ee36d8, 0x080a0208, 0x9f7be49f, 0x8220a282, 0x13d4c713,
0x23e8cb23, 0x7ae69c7a, 0xab42e9ab, 0xfe43bdfe, 0x2aa2882a, 0x4b9ad14b,
0x01404101, 0x1fdbc41f, 0xe0d838e0, 0xd661b7d6, 0x8e2fa18e, 0xdf2bf4df,
0xcb3af1cb, 0x3bf6cd3b, 0xe71dfae7, 0x85e56085, 0x54411554, 0x8625a386,
0x8360e383, 0xba16acba, 0x75295c75, 0x9234a692, 0x6ef7996e, 0xd0e434d0,
0x68721a68, 0x55015455, 0xb619afb6, 0x4edf914e, 0xc8fa32c8, 0xc0f030c0,
0xd721f6d7, 0x32bc8e32, 0xc675b3c6, 0x8f6fe08f, 0x74691d74, 0xdb2ef5db,
0x8b6ae18b, 0xb8962eb8, 0x0a8a800a, 0x99fe6799, 0x2be2c92b, 0x81e06181,
0x03c0c303, 0xa48d29a4, 0x8caf238c, 0xae07a9ae, 0x34390d34, 0x4d1f524d,
0x39764f39, 0xbdd36ebd, 0x5781d657, 0x6fb7d86f, 0xdceb37dc, 0x15514415,
0x7ba6dd7b, 0xf709fef7, 0x3ab68c3a, 0xbc932fbc, 0x0c0f030c, 0xff03fcff,
0xa9c26ba9, 0xc9ba73c9, 0xb5d96cb5, 0xb1dc6db1, 0x6d375a6d, 0x45155045,
0x36b98f36, 0x6c771b6c, 0xbe13adbe, 0x4ada904a, 0xee57b9ee, 0x77a9de77,
0xf24cbef2, 0xfd837efd, 0x44551144, 0x67bdda67, 0x712c5d71, 0x05454005,
0x7c631f7c, 0x40501040, 0x69325b69, 0x63b8db63, 0x28220a28, 0x07c5c207,
0xc4f531c4, 0x22a88a22, 0x9631a796, 0x37f9ce37, 0xed977aed, 0xf649bff6,
0xb4992db4, 0xd1a475d1, 0x4390d343, 0x485a1248, 0xe258bae2, 0x9771e697,
0xd264b6d2, 0xc270b2c2, 0x26ad8b26, 0xa5cd68a5, 0x5ecb955e, 0x29624b29,
0x303c0c30, 0x5ace945a, 0xddab76dd, 0xf9867ff9, 0x95f16495, 0xe65dbbe6,
0xc735f2c7, 0x242d0924, 0x17d1c617, 0xb9d66fb9, 0x1bdec51b, 0x12948612,
0x60781860, 0xc330f3c3, 0xf5897cf5, 0xb35cefb3, 0xe8d23ae8, 0x73acdf73,
0x35794c35, 0x80a02080, 0xe59d78e5, 0xbb56edbb, 0x7d235e7d, 0xf8c63ef8,
0x5f8bd45f, 0x2fe7c82f, 0xe4dd39e4, 0x21684921,
};
static const word32 sm4_sbox_3[256] = {
0x8ed55b5b, 0xd0924242, 0x4deaa7a7, 0x06fdfbfb, 0xfccf3333, 0x65e28787,
0xc93df4f4, 0x6bb5dede, 0x4e165858, 0x6eb4dada, 0x44145050, 0xcac10b0b,
0x8828a0a0, 0x17f8efef, 0x9c2cb0b0, 0x11051414, 0x872bacac, 0xfb669d9d,
0xf2986a6a, 0xae77d9d9, 0x822aa8a8, 0x46bcfafa, 0x14041010, 0xcfc00f0f,
0x02a8aaaa, 0x54451111, 0x5f134c4c, 0xbe269898, 0x6d482525, 0x9e841a1a,
0x1e061818, 0xfd9b6666, 0xec9e7272, 0x4a430909, 0x10514141, 0x24f7d3d3,
0xd5934646, 0x53ecbfbf, 0xf89a6262, 0x927be9e9, 0xff33cccc, 0x04555151,
0x270b2c2c, 0x4f420d0d, 0x59eeb7b7, 0xf3cc3f3f, 0x1caeb2b2, 0xea638989,
0x74e79393, 0x7fb1cece, 0x6c1c7070, 0x0daba6a6, 0xedca2727, 0x28082020,
0x48eba3a3, 0xc1975656, 0x80820202, 0xa3dc7f7f, 0xc4965252, 0x12f9ebeb,
0xa174d5d5, 0xb38d3e3e, 0xc33ffcfc, 0x3ea49a9a, 0x5b461d1d, 0x1b071c1c,
0x3ba59e9e, 0x0cfff3f3, 0x3ff0cfcf, 0xbf72cdcd, 0x4b175c5c, 0x52b8eaea,
0x8f810e0e, 0x3d586565, 0xcc3cf0f0, 0x7d196464, 0x7ee59b9b, 0x91871616,
0x734e3d3d, 0x08aaa2a2, 0xc869a1a1, 0xc76aadad, 0x85830606, 0x7ab0caca,
0xb570c5c5, 0xf4659191, 0xb2d96b6b, 0xa7892e2e, 0x18fbe3e3, 0x47e8afaf,
0x330f3c3c, 0x674a2d2d, 0xb071c1c1, 0x0e575959, 0xe99f7676, 0xe135d4d4,
0x661e7878, 0xb4249090, 0x360e3838, 0x265f7979, 0xef628d8d, 0x38596161,
0x95d24747, 0x2aa08a8a, 0xb1259494, 0xaa228888, 0x8c7df1f1, 0xd73becec,
0x05010404, 0xa5218484, 0x9879e1e1, 0x9b851e1e, 0x84d75353, 0x00000000,
0x5e471919, 0x0b565d5d, 0xe39d7e7e, 0x9fd04f4f, 0xbb279c9c, 0x1a534949,
0x7c4d3131, 0xee36d8d8, 0x0a020808, 0x7be49f9f, 0x20a28282, 0xd4c71313,
0xe8cb2323, 0xe69c7a7a, 0x42e9abab, 0x43bdfefe, 0xa2882a2a, 0x9ad14b4b,
0x40410101, 0xdbc41f1f, 0xd838e0e0, 0x61b7d6d6, 0x2fa18e8e, 0x2bf4dfdf,
0x3af1cbcb, 0xf6cd3b3b, 0x1dfae7e7, 0xe5608585, 0x41155454, 0x25a38686,
0x60e38383, 0x16acbaba, 0x295c7575, 0x34a69292, 0xf7996e6e, 0xe434d0d0,
0x721a6868, 0x01545555, 0x19afb6b6, 0xdf914e4e, 0xfa32c8c8, 0xf030c0c0,
0x21f6d7d7, 0xbc8e3232, 0x75b3c6c6, 0x6fe08f8f, 0x691d7474, 0x2ef5dbdb,
0x6ae18b8b, 0x962eb8b8, 0x8a800a0a, 0xfe679999, 0xe2c92b2b, 0xe0618181,
0xc0c30303, 0x8d29a4a4, 0xaf238c8c, 0x07a9aeae, 0x390d3434, 0x1f524d4d,
0x764f3939, 0xd36ebdbd, 0x81d65757, 0xb7d86f6f, 0xeb37dcdc, 0x51441515,
0xa6dd7b7b, 0x09fef7f7, 0xb68c3a3a, 0x932fbcbc, 0x0f030c0c, 0x03fcffff,
0xc26ba9a9, 0xba73c9c9, 0xd96cb5b5, 0xdc6db1b1, 0x375a6d6d, 0x15504545,
0xb98f3636, 0x771b6c6c, 0x13adbebe, 0xda904a4a, 0x57b9eeee, 0xa9de7777,
0x4cbef2f2, 0x837efdfd, 0x55114444, 0xbdda6767, 0x2c5d7171, 0x45400505,
0x631f7c7c, 0x50104040, 0x325b6969, 0xb8db6363, 0x220a2828, 0xc5c20707,
0xf531c4c4, 0xa88a2222, 0x31a79696, 0xf9ce3737, 0x977aeded, 0x49bff6f6,
0x992db4b4, 0xa475d1d1, 0x90d34343, 0x5a124848, 0x58bae2e2, 0x71e69797,
0x64b6d2d2, 0x70b2c2c2, 0xad8b2626, 0xcd68a5a5, 0xcb955e5e, 0x624b2929,
0x3c0c3030, 0xce945a5a, 0xab76dddd, 0x867ff9f9, 0xf1649595, 0x5dbbe6e6,
0x35f2c7c7, 0x2d092424, 0xd1c61717, 0xd66fb9b9, 0xdec51b1b, 0x94861212,
0x78186060, 0x30f3c3c3, 0x897cf5f5, 0x5cefb3b3, 0xd23ae8e8, 0xacdf7373,
0x794c3535, 0xa0208080, 0x9d78e5e5, 0x56edbbbb, 0x235e7d7d, 0xc63ef8f8,
0x8bd45f5f, 0xe7c82f2f, 0xdd39e4e4, 0x68492121,
};
/* Linear transformation of nonlinear transformation tau.
*
* Each S-box value has had the linear transformation applied.
*
* @param [in] x Unsigned 32-bit value to transform.
* @return Unsigned 32-bit bit value.
*/
static WC_INLINE word32 sm4_t(word32 x)
{
return sm4_sbox_3[(byte)(x >> 24)] ^
sm4_sbox_2[(byte)(x >> 16)] ^
sm4_sbox_1[(byte)(x >> 8)] ^
sm4_sbox_0[(byte)(x >> 0)];
}
#else
/* Linear transformation of nonlinear transformation tau.
*
* @param [in] x Unsigned 32-bit value to transform.
* @return Unsigned 32-bit bit value.
*/
static word32 sm4_t(word32 x)
{
word32 t;
/* Nonlinear transformation. */
t = ((word32)sm4_sbox[(byte)(x >> 24)]) << 24;
t |= ((word32)sm4_sbox[(byte)(x >> 16)]) << 16;
t |= ((word32)sm4_sbox[(byte)(x >> 8)]) << 8;
t |= sm4_sbox[(byte) x ] ;
/* Linear transformation. */
return t ^ rotlFixed(t, 2) ^ rotlFixed(t, 10) ^ rotlFixed(t, 18) ^
rotlFixed(t, 24);
}
#endif
#endif /* !__aarch64__ || !WOLFSSL_ARMASM_CRYPTO_SM4 */
/* Key schedule calculation.
*
* @param [in] key Array of bytes representing key.
* @param [out] ks Array of unsigned 32-bit values that are the key schedule.
*/
static void sm4_key_schedule(const byte* key, word32* ks)
{
#if !defined(__aarch64__) || !defined(WOLFSSL_ARMASM_CRYPTO_SM4)
#ifndef WOLFSSL_SMALL_STACK
word32 k[36];
word32 t;
word32 x;
int i;
/* Load key into words. */
LOAD_U32_BE(key, k[0], k[1], k[2], k[3]);
k[0] ^= sm4_fk[0];
k[1] ^= sm4_fk[1];
k[2] ^= sm4_fk[2];
k[3] ^= sm4_fk[3];
/* Calculate each word of key schedule. */
for (i = 0; i < SM4_KEY_SCHEDULE; ++i) {
x = k[i + 1] ^ k[i + 2] ^ k[i + 3] ^ sm4_ck[i];
/* Nonlinear operation tau */
t = ((word32)sm4_sbox[(byte)(x >> 24)]) << 24 |
((word32)sm4_sbox[(byte)(x >> 16)]) << 16 |
((word32)sm4_sbox[(byte)(x >> 8)]) << 8 |
((word32)sm4_sbox[(byte)(x )]) ;
/* Linear operation L' */
k[i+4] = k[i] ^ (t ^ rotlFixed(t, 13) ^ rotlFixed(t, 23));
ks[i] = k[i + 4];
}
#else
word32 k[8];
word32 t;
word32 x;
int i;
/* Load key into words. */
LOAD_U32_BE(key, k[0], k[1], k[2], k[3]);
k[0] ^= sm4_fk[0];
k[1] ^= sm4_fk[1];
k[2] ^= sm4_fk[2];
k[3] ^= sm4_fk[3];
/* Calculate first 4 words of key schedule using k. */
for (i = 0; i < 4; ++i) {
x = k[i + 1] ^ k[i + 2] ^ k[i + 3] ^ sm4_ck[i];
/* Nonlinear operation tau */
t = ((word32)sm4_sbox[(byte)(x >> 24)]) << 24 |
((word32)sm4_sbox[(byte)(x >> 16)]) << 16 |
((word32)sm4_sbox[(byte)(x >> 8)]) << 8 |
((word32)sm4_sbox[(byte)(x )]) ;
/* Linear operation L' */
k[i + 4] = k[i] ^ (t ^ rotlFixed(t, 13) ^ rotlFixed(t, 23));
ks[i] = k[i + 4];
}
/* Calculate remaining words of key schedule without k. */
for (; i < SM4_KEY_SCHEDULE; ++i) {
x = ks[i - 3] ^ ks[i - 2] ^ ks[i - 1] ^ sm4_ck[i];
/* Nonlinear operation tau */
t = ((word32)sm4_sbox[(byte)(x >> 24)]) << 24 |
((word32)sm4_sbox[(byte)(x >> 16)]) << 16 |
((word32)sm4_sbox[(byte)(x >> 8)]) << 8 |
((word32)sm4_sbox[(byte)(x )]) ;
/* Linear operation L' */
ks[i] = ks[i - 4] ^ (t ^ rotlFixed(t, 13) ^ rotlFixed(t, 23));
}
#endif
#else
word32* ck = sm4_ck;
__asm__ volatile (
"LD1 {v0.16b}, [%[key]]\n\t"
"LD1 {v9.16b}, [%[fk]]\n\t"
"REV32 v0.16B, v0.16B\n\t"
"LD1 {v1.4S-v4.4S}, [%[ck]], #64\n\t"
"EOR v0.16B, v0.16B, v9.16B\n\t"
"LD1 {v5.4S-v8.4S}, [%[ck]]\n\t"
"SM4EKEY v1.4S, v0.4S, v1.4S\n\t"
"SM4EKEY v2.4S, v1.4S, v2.4S\n\t"
"SM4EKEY v3.4S, v2.4S, v3.4S\n\t"
"SM4EKEY v4.4S, v3.4S, v4.4S\n\t"
"SM4EKEY v5.4S, v4.4S, v5.4S\n\t"
"SM4EKEY v6.4S, v5.4S, v6.4S\n\t"
"SM4EKEY v7.4S, v6.4S, v7.4S\n\t"
"SM4EKEY v8.4S, v7.4S, v8.4S\n\t"
"ST4 {v1.S-v4.S}[0], [%[ks]], #16\n\t"
"ST4 {v5.S-v8.S}[0], [%[ks]], #16\n\t"
"ST4 {v1.S-v4.S}[1], [%[ks]], #16\n\t"
"ST4 {v5.S-v8.S}[1], [%[ks]], #16\n\t"
"ST4 {v1.S-v4.S}[2], [%[ks]], #16\n\t"
"ST4 {v5.S-v8.S}[2], [%[ks]], #16\n\t"
"ST4 {v1.S-v4.S}[3], [%[ks]], #16\n\t"
"ST4 {v5.S-v8.S}[3], [%[ks]], #16\n\t"
: [ks] "+r" (ks), [ck] "+r" (ck)
: [key] "r" (key), [fk] "r" (sm4_fk)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8",
"v9"
);
#endif
}
/* Round operation.
*
* Assumes x0, x1, x2, x3 are the current state.
* Assumes ks is the key schedule.
*
* @param [in] k0 Index into key schedule for first word.
* @param [in] k1 Index into key schedule for second word.
* @param [in] k2 Index into key schedule for third word.
* @param [in] k3 Index into key schedule for fourth word.
*/
#define SM4_ROUNDS(k0, k1, k2, k3) \
x0 ^= sm4_t(x1 ^ x2 ^ x3 ^ ks[k0]); \
x1 ^= sm4_t(x0 ^ x2 ^ x3 ^ ks[k1]); \
x2 ^= sm4_t(x0 ^ x1 ^ x3 ^ ks[k2]); \
x3 ^= sm4_t(x0 ^ x1 ^ x2 ^ ks[k3])
/* Encrypt a block of data using SM4 algorithm.
*
* @param [in] ks Key schedule.
* @param [in] in Block to encrypt.
* @param [out] out Encrypted block.
*/
static void sm4_encrypt(const word32* ks, const byte* in, byte* out)
{
#if !defined(__aarch64__) || !defined(WOLFSSL_ARMASM_CRYPTO_SM4)
word32 x0, x1, x2, x3;
/* Load block. */
LOAD_U32_BE(in, x0, x1, x2, x3);
/* Encrypt block. */
SM4_ROUNDS( 0, 1, 2, 3);
SM4_ROUNDS( 4, 5, 6, 7);
SM4_ROUNDS( 8, 9, 10, 11);
SM4_ROUNDS(12, 13, 14, 15);
SM4_ROUNDS(16, 17, 18, 19);
SM4_ROUNDS(20, 21, 22, 23);
SM4_ROUNDS(24, 25, 26, 27);
SM4_ROUNDS(28, 29, 30, 31);
/* Store encrypted block. */
STORE_U32_BE(x0, x1, x2, x3, out);
#else
__asm__ volatile (
"LD1 {v0.16b}, [%[in]]\n\t"
"LD4 {v1.S-v4.S}[0], [%[ks]], #16\n\t"
"LD4 {v5.S-v8.S}[0], [%[ks]], #16\n\t"
"LD4 {v1.S-v4.S}[1], [%[ks]], #16\n\t"
"LD4 {v5.S-v8.S}[1], [%[ks]], #16\n\t"
"REV32 v0.16B, v0.16B\n\t"
"LD4 {v1.S-v4.S}[2], [%[ks]], #16\n\t"
"LD4 {v5.S-v8.S}[2], [%[ks]], #16\n\t"
"LD4 {v1.S-v4.S}[3], [%[ks]], #16\n\t"
"LD4 {v5.S-v8.S}[3], [%[ks]], #16\n\t"
"SM4E v0.4S, v1.4S\n\t"
"SM4E v0.4S, v2.4S\n\t"
"SM4E v0.4S, v3.4S\n\t"
"SM4E v0.4S, v4.4S\n\t"
"SM4E v0.4S, v5.4S\n\t"
"SM4E v0.4S, v6.4S\n\t"
"SM4E v0.4S, v7.4S\n\t"
"SM4E v0.4S, v8.4S\n\t"
"REV64 v0.16B, v0.16B\n\t"
"EXT v0.16B, v0.16B, v0.16B, #8\n\t"
"ST1 {v0.16b}, [%[out]]\n\t"
: [ks] "+r" (ks), [out] "+r" (out)
: [in] "r" (in)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8"
);
#endif
}
#if defined(WOLFSSL_SM4_ECB) || defined(WOLFSSL_SM4_CBC)
/* Decrypt a block of data using SM4 algorithm.
*
* @param [in] ks Key schedule.
* @param [in] in Block to decrypt.
* @param [out] out Decrypted block.
*/
static void sm4_decrypt(const word32* ks, const byte* in, byte* out)
{
#if !defined(__aarch64__) || !defined(WOLFSSL_ARMASM_CRYPTO_SM4)
word32 x0, x1, x2, x3;
/* Load block. */
LOAD_U32_BE(in, x0, x1, x2, x3);
/* Decrypt block. */
SM4_ROUNDS(31, 30, 29, 28);
SM4_ROUNDS(27, 26, 25, 24);
SM4_ROUNDS(23, 22, 21, 20);
SM4_ROUNDS(19, 18, 17, 16);
SM4_ROUNDS(15, 14, 13, 12);
SM4_ROUNDS(11, 10, 9, 8);
SM4_ROUNDS( 7, 6, 5, 4);
SM4_ROUNDS( 3, 2, 1, 0);
/* Store decrypted block. */
STORE_U32_BE(x0, x1, x2, x3, out);
#else
__asm__ volatile (
"LD1 {v0.16b}, [%[in]]\n\t"
"LD4 {v1.S-v4.S}[3], [%[ks]], #16\n\t"
"LD4 {v5.S-v8.S}[3], [%[ks]], #16\n\t"
"LD4 {v1.S-v4.S}[2], [%[ks]], #16\n\t"
"LD4 {v5.S-v8.S}[2], [%[ks]], #16\n\t"
"REV32 v0.16B, v0.16B\n\t"
"LD4 {v1.S-v4.S}[1], [%[ks]], #16\n\t"
"LD4 {v5.S-v8.S}[1], [%[ks]], #16\n\t"
"LD4 {v1.S-v4.S}[0], [%[ks]], #16\n\t"
"LD4 {v5.S-v8.S}[0], [%[ks]], #16\n\t"
"SM4E v0.4S, v8.4S\n\t"
"SM4E v0.4S, v7.4S\n\t"
"SM4E v0.4S, v6.4S\n\t"
"SM4E v0.4S, v5.4S\n\t"
"SM4E v0.4S, v4.4S\n\t"
"SM4E v0.4S, v3.4S\n\t"
"SM4E v0.4S, v2.4S\n\t"
"SM4E v0.4S, v1.4S\n\t"
"REV64 v0.16B, v0.16B\n\t"
"EXT v0.16B, v0.16B, v0.16B, #8\n\t"
"ST1 {v0.16b}, [%[out]]\n\t"
: [ks] "+r" (ks)
: [in] "r" (in), [out] "r" (out)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8"
);
#endif
}
#endif
/* Initialize the SM4 algorithm object.
*
* @param [in, out] sm4 SM4 algorithm object.
* @param [in] heap Heap hint for dynamic memory allocation.
* @param [in] devId Device identifier.
* @return 0 on success.
* @return BAD_FUNC_ARG when sm4 is NULL.
*/
int wc_Sm4Init(wc_Sm4* sm4, void* heap, int devId)
{
int ret = 0;
/* No device support yet. */
(void)devId;
/* Validate parameters. */
if (sm4 == NULL) {
ret = BAD_FUNC_ARG;
}
if (ret == 0) {
/* Set all fields to zero including bit fields. */
XMEMSET(sm4, 0, sizeof(*sm4));
/* Cache heap hint to use with any dynamic allocations. */
sm4->heap = heap;
}
return ret;
}
/* Dispose of SM4 algorithm object.
*
* Zeroize sensitive data in object.
*
* @param [in, out] sm4 SM4 algorithm object.
*/
void wc_Sm4Free(wc_Sm4* sm4)
{
/* Check we have something to work with. */
if (sm4 != NULL) {
/* Must zeroize key schedule. */
ForceZero(sm4->ks, sizeof(sm4->ks));
#if defined(WOLFSSL_SM4_CTR)
/* For CBC, tmp is cipher text - no need to zeroize. */
/* For CTR, tmp is encrypted counter that must be zeroized. */
ForceZero(sm4->tmp, sizeof(sm4->tmp));
#endif
}
}
/* Set the key.
*
* @param [in, out] sm4 SM4 algorithm object.
* @param [in] key Array of bytes representing key.
*/
static void sm4_set_key(wc_Sm4* sm4, const byte* key)
{
/* Create key schedule. */
sm4_key_schedule(key, sm4->ks);
/* Mark key as having been set. */
sm4->keySet = 1;
}
#if defined(WOLFSSL_SM4_ECB) || defined(WOLFSSL_SM4_CBC) || \
defined(WOLFSSL_SM4_CTR) || defined(WOLFSSL_SM4_CCM)
/* Set the key.
*
* @param [in, out] sm4 SM4 algorithm object.
* @param [in] key Array of bytes representing key.
* @param [in] len Length of key. Must be SM4_KEY_SIZE.
* @return 0 on success.
* @return BAD_FUNC_ARG when sm4 or key is NULL.
* @return BAD_FUNC_ARG when len is not SM4_KEY_SIZE.
*/
int wc_Sm4SetKey(wc_Sm4* sm4, const byte* key, word32 len)
{
int ret = 0;
/* Validate parameters. */
if ((sm4 == NULL) || (key == NULL) || (len != SM4_KEY_SIZE)) {
ret = BAD_FUNC_ARG;
}
if (ret == 0) {
sm4_set_key(sm4, key);
}
return ret;
}
#endif
#if defined(WOLFSSL_SM4_CBC) || defined(WOLFSSL_SM4_CTR) || \
defined(WOLFSSL_SM4_GCM)
/* Set the IV.
*
* @param [in, out] sm4 SM4 algorithm object.
* @param [in] iv Array of bytes representing IV. May be NULL.
*/
static void sm4_set_iv(wc_Sm4* sm4, const byte* iv)
{
/* Set IV. */
XMEMCPY(sm4->iv, iv, SM4_IV_SIZE);
#ifdef WOLFSSL_SM4_CTR
/* Unused count of encrypted counter for CTR mode. */
sm4->unused = 0;
#endif
sm4->ivSet = 1;
}
#endif
#if defined(WOLFSSL_SM4_CBC) || defined(WOLFSSL_SM4_CTR)
/* Set the IV.
*
* @param [in, out] sm4 SM4 algorithm object.
* @param [in] iv Array of bytes representing IV. May be NULL.
* @return 0 on success.
* @return BAD_FUNC_ARG when sm4 or iv is NULL.
*/
int wc_Sm4SetIV(wc_Sm4* sm4, const byte* iv)
{
int ret = 0;
/* Validate parameters. */
if ((sm4 == NULL) || (iv == NULL)) {
ret = BAD_FUNC_ARG;
}
if (ret == 0) {
sm4_set_iv(sm4, iv);
}
return ret;
}
#endif
#ifdef WOLFSSL_SM4_ECB
/* Encrypt bytes using SM4-ECB.
*
* Length of input must be a multiple of the block size.
* Assumes out is at least sz bytes long.
*
* @param [in] sm4 SM4 algorithm object.
* @param [out] out Byte array in which to place encrypted data.
* @param [in] in Array of bytes to encrypt.
* @param [in] sz Number of bytes to encrypt.
* @return 0 on success.
* @return BAD_FUNC_ARG when sm4, out or in is NULL.
* @return BAD_FUNC_ARG when sz is not a multiple of SM4_BLOCK_SIZE.
* @return MISSING_KEY when a key has not been set.
*/
int wc_Sm4EcbEncrypt(wc_Sm4* sm4, byte* out, const byte* in, word32 sz)
{
int ret = 0;
/* Validate parameters. */
if ((sm4 == NULL) || (in == NULL) || (out == NULL)) {
ret = BAD_FUNC_ARG;
}
/* Can only work on multiples of block size of bytes. */
if ((ret == 0) && ((sz & (SM4_BLOCK_SIZE - 1)) != 0)) {
ret = BAD_FUNC_ARG;
}
/* Ensure a key has been set. */
if ((ret == 0) && (!sm4->keySet)) {
ret = MISSING_KEY;
}
if (ret == 0) {
/* Encrypt all bytes. */
while (sz > 0) {
/* Encrypt a block. */
sm4_encrypt(sm4->ks, in, out);
/* Move on to next block. */
in += SM4_BLOCK_SIZE;
out += SM4_BLOCK_SIZE;
sz -= SM4_BLOCK_SIZE;
}
}
return ret;
}
/* Decrypt bytes using SM4-ECB.
*
* Length of input must be a multiple of the block size.
* Assumes out is at least sz bytes long.
*
* @param [in] sm4 SM4 algorithm object.
* @param [out] out Byte array in which to place decrypted data.
* @param [in] in Array of bytes to decrypt.
* @param [in] sz Number of bytes to decrypt.
* @return 0 on success.
* @return BAD_FUNC_ARG when sm4, out or in is NULL.
* @return BAD_FUNC_ARG when sz is not a multiple of SM4_BLOCK_SIZE.
* @return MISSING_KEY when a key has not been set.
*/
int wc_Sm4EcbDecrypt(wc_Sm4* sm4, byte* out, const byte* in, word32 sz)
{
int ret = 0;
/* Validate parameters. */
if ((sm4 == NULL) || (in == NULL) || (out == NULL)) {
ret = BAD_FUNC_ARG;
}
/* Can only work on multiples of block size of bytes. */
if ((ret == 0) && ((sz & (SM4_BLOCK_SIZE - 1)) != 0)) {
ret = BAD_FUNC_ARG;
}
/* Ensure a key has been set. */
if ((ret == 0) && (!sm4->keySet)) {
ret = MISSING_KEY;
}
if (ret == 0) {
/* Decrypt all bytes. */
while (sz > 0) {
/* Decrypt a block. */
sm4_decrypt(sm4->ks, in, out);
/* Move on to next block. */
in += SM4_BLOCK_SIZE;
out += SM4_BLOCK_SIZE;
sz -= SM4_BLOCK_SIZE;
}
}
return ret;
}
#endif /* WOLFSSL_SM4_ECB */
#ifdef WOLFSSL_SM4_CBC
/* Encrypt bytes using SM4-CBC.
*
* Length of input must be a multiple of the block size.
* Assumes out is at least sz bytes long.
*
* @param [in] sm4 SM4 algorithm object.
* @param [out] out Byte array in which to place encrypted data.
* @param [in] in Array of bytes to encrypt.
* @param [in] sz Number of bytes to encrypt.
* @return 0 on success.
* @return BAD_FUNC_ARG when sm4, out or in is NULL.
* @return BAD_FUNC_ARG when sz is not a multiple of SM4_BLOCK_SIZE.
* @return MISSING_KEY when a key has not been set.
* @return MISSING_IV when an IV has not been set.
*/
int wc_Sm4CbcEncrypt(wc_Sm4* sm4, byte* out, const byte* in, word32 sz)
{
int ret = 0;
/* Validate parameters. */
if ((sm4 == NULL) || (in == NULL) || (out == NULL)) {
ret = BAD_FUNC_ARG;
}
/* Can only work on multiples of block size of bytes. */
if ((ret == 0) && ((sz & (SM4_BLOCK_SIZE - 1)) != 0)) {
ret = BAD_FUNC_ARG;
}
/* Ensure a key and IV have been set. */
if ((ret == 0) && (!sm4->keySet)) {
ret = MISSING_KEY;
}
if ((ret == 0) && (!sm4->ivSet)) {
ret = MISSING_IV;
}
if (ret == 0) {
/* Encrypt all bytes. */
while (sz > 0) {
/* XOR next block into IV. */
xorbuf(sm4->iv, in, SM4_BLOCK_SIZE);
/* Encrypt IV XORed with block. */
sm4_encrypt(sm4->ks, sm4->iv, sm4->iv);
/* Use output block as next IV. */
XMEMCPY(out, sm4->iv, SM4_BLOCK_SIZE);
/* Move on to next block. */
in += SM4_BLOCK_SIZE;
out += SM4_BLOCK_SIZE;
sz -= SM4_BLOCK_SIZE;
}
}
return ret;
}
/* Decrypt bytes using SM4-CBC.
*
* Length of input must be a multiple of the block size.
* Assumes out is at least sz bytes long.
*
* @param [in] sm4 SM4 algorithm object.
* @param [out] out Byte array in which to place decrypted data.
* @param [in] in Array of bytes to decrypt.
* @param [in] sz Number of bytes to decrypt.
* @return 0 on success.
* @return BAD_FUNC_ARG when sm4, out or in is NULL.
* @return MISSING_KEY when a key has not been set.
* @return MISSING_IV when an IV has not been set.
*/
int wc_Sm4CbcDecrypt(wc_Sm4* sm4, byte* out, const byte* in, word32 sz)
{
int ret = 0;
/* Validate parameters. */
if ((sm4 == NULL) || (in == NULL) || (out == NULL)) {
ret = BAD_FUNC_ARG;
}
/* Can only work on multiples of block size of bytes. */
if ((ret == 0) && ((sz & (SM4_BLOCK_SIZE - 1)) != 0)) {
ret = BAD_FUNC_ARG;
}
/* Ensure a key and IV have been set. */
if ((ret == 0) && (!sm4->keySet)) {
ret = MISSING_KEY;
}
if ((ret == 0) && (!sm4->ivSet)) {
ret = MISSING_IV;
}
if (ret == 0) {
#ifndef WOLFSSL_SM4_SMALL
if (in != out) {
while (sz > 0) {
/* Decrypt next block. */
sm4_decrypt(sm4->ks, in, sm4->tmp);
/* XOR decrypted block with IV to create output. */
xorbufout(out, sm4->tmp, sm4->iv, SM4_BLOCK_SIZE);
/* This encrypted block is the IV for next decryption. */
XMEMCPY(sm4->iv, in, SM4_BLOCK_SIZE);
/* Move on to next block. */
in += SM4_BLOCK_SIZE;
out += SM4_BLOCK_SIZE;
sz -= SM4_BLOCK_SIZE;
}
}
else
#endif
{
while (sz > 0) {
/* Cache encrypted block as it is next IV. */
XMEMCPY(sm4->tmp, in, SM4_BLOCK_SIZE);
/* Decrypt next block. */
sm4_decrypt(sm4->ks, sm4->tmp, out);
/* XOR decrypted block with IV to create output. */
xorbuf(out, sm4->iv, SM4_BLOCK_SIZE);
/* Cached encrypted block is next IV. */
XMEMCPY(sm4->iv, sm4->tmp, SM4_BLOCK_SIZE);
/* Move on to next block. */
in += SM4_BLOCK_SIZE;
out += SM4_BLOCK_SIZE;
sz -= SM4_BLOCK_SIZE;
}
}
}
return ret;
}