/* ==================================================================== * Copyright (c) 2014 - 2017 The GmSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the GmSSL Project. * (http://gmssl.org/)" * * 4. The name "GmSSL Project" must not be used to endorse or promote * products derived from this software without prior written * permission. For written permission, please contact * guanzhi1980@gmail.com. * * 5. Products derived from this software may not be called "GmSSL" * nor may "GmSSL" appear in their names without prior written * permission of the GmSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the GmSSL Project * (http://gmssl.org/)" * * THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE GmSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== */ #include //rotate n bits to the left in a 32bit buffer #define SM4_ROTL32(buf, n) (((buf)<>(32-n))) uint32_t 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 }; uint8_t 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 }; uint32_t SM4_FK[4] = {0xA3B1BAC6, 0x56AA3350, 0x677D9197, 0xB27022DC}; void sm4_standard_key_schedule(const unsigned char *key, uint32_t *rk) { uint32_t tmp, buf, K[36]; uint32_t i; for (i = 0; i < 4; i++) { K[i] = SM4_FK[i] ^ ( (key[4 * i] << 24) | (key[4 * i + 1] << 16) | (key[4 * i + 2] << 8) | (key[4 * i + 3]) ); } for (i = 0; i < 32; i++) { tmp = K[i + 1] ^ K[i + 2] ^ K[i + 3] ^ SM4_CK[i]; //nonlinear operation buf = (SM4_SBOX[(tmp >> 24) & 0xFF]) << 24 | (SM4_SBOX[(tmp >> 16) & 0xFF]) << 16 | (SM4_SBOX[(tmp >> 8) & 0xFF]) << 8 | (SM4_SBOX[tmp & 0xFF]); //linear operation K[i + 4] = K[i] ^ ((buf) ^ (SM4_ROTL32((buf), 13)) ^ (SM4_ROTL32((buf), 23))); rk[i] = K[i + 4]; } } void sms4_standard_encrypt(const unsigned char *in, unsigned char *out, const unsigned char *key) { uint32_t rk[32], X[36], tmp, buf; uint32_t i, j; sm4_standard_key_schedule(key, rk); for (j = 0; j < 4; j++) { X[j] = (in[j * 4] << 24) | (in[j * 4 + 1] << 16) | (in[j * 4 + 2] << 8) | (in[j * 4 + 3]); } for (i = 0; i < 32; i++) { tmp = X[i + 1] ^ X[i + 2] ^ X[i + 3] ^ rk[i]; //nonlinear operation buf = ( SM4_SBOX[(tmp >> 24) & 0xFF]) << 24 | (SM4_SBOX[(tmp >> 16) & 0xFF]) << 16 | (SM4_SBOX[(tmp >> 8) & 0xFF]) << 8 | (SM4_SBOX[tmp & 0xFF]); //linear operation X[i + 4] = X[i] ^ (buf ^ SM4_ROTL32((buf), 2)^ SM4_ROTL32((buf), 10) ^ SM4_ROTL32((buf), 18)^ SM4_ROTL32((buf), 24)); } for (j = 0; j < 4; j++) { out[4 * j] = (X[35 - j] >> 24) & 0xFF; out[4 * j + 1] = (X[35 - j] >> 16) & 0xFF; out[4 * j + 2] = (X[35 - j] >> 8) & 0xFF; out[4 * j + 3] = (X[35 - j]) & 0xFF; } } void sms4_standard_decrypt(const unsigned char *in, unsigned char *out, const unsigned char *key) { uint32_t rk[32], X[36], tmp, buf; uint32_t i, j; sm4_standard_key_schedule(key, rk); for (j = 0; j < 4; j++) { X[j] = (in[j * 4] << 24) | (in[j * 4 + 1] << 16) | (in[j * 4 + 2] << 8) | (in[j * 4 + 3]); } for (i = 0; i < 32; i++) { tmp = X[i + 1] ^ X[i + 2] ^ X[i + 3] ^ rk[31 - i]; //nonlinear operation buf = (SM4_SBOX[(tmp >> 24) & 0xFF]) << 24 | (SM4_SBOX[(tmp >> 16) & 0xFF]) << 16 | (SM4_SBOX[(tmp >> 8) & 0xFF]) << 8 | (SM4_SBOX[tmp & 0xFF]); //linear operation X[i + 4] = X[i] ^ (buf ^ SM4_ROTL32((buf), 2)^ SM4_ROTL32((buf), 10) ^ SM4_ROTL32((buf), 18)^ SM4_ROTL32((buf), 24)); } for (j = 0; j < 4; j++) { out[4 * j] = (X[35 - j] >> 24) & 0xFF; out[4 * j + 1] = (X[35 - j] >> 16) & 0xFF; out[4 * j + 2] = (X[35 - j] >> 8) & 0xFF; out[4 * j + 3] = (X[35 - j]) & 0xFF; } } int sm4_standard_self_check() { int i; //Standard data unsigned char key[16] = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10}; unsigned char plain[16] = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10}; unsigned char cipher[16] = {0x68, 0x1e, 0xdf, 0x34, 0xd2, 0x06, 0x96, 0x5e, 0x86, 0xb3, 0xe9, 0x4f, 0x53, 0x6e, 0x42, 0x46}; unsigned char En_output[16]; unsigned char De_output[16]; sms4_standard_encrypt(plain, En_output,key); sms4_standard_decrypt(cipher, De_output,key); for (i = 0; i < 16; i++) { if ( (En_output[i] != cipher[i]) | (De_output[i] != plain[i]) ) { return 1; } } return 0; }