add sms4 module

2026-08-08 23:13:38 +08:00 · 2017-02-14 23:14:06 +08:00
parent 4e49434209
commit 01c76aa6a0
33 changed files with 3036 additions and 6 deletions
--- a/crypto/sms4/sms4_setkey.c
+++ b/crypto/sms4/sms4_setkey.c
@@ -0,0 +1,116 @@
+/* ====================================================================
+ * 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 <openssl/sms4.h>
+#include "sms4_lcl.h"
+
+static uint32_t FK[4] = {
+	0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc,
+};
+
+static uint32_t 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,
+};
+
+#define L32_(x)					\
+	((x) ^ 					\
+	ROT32((x), 13) ^			\
+	ROT32((x), 23))
+
+#define ENC_ROUND(x0, x1, x2, x3, x4, i)	\
+	x4 = x1 ^ x2 ^ x3 ^ *(CK + i);		\
+	x4 = S32(x4);				\
+	x4 = x0 ^ L32_(x4);			\
+	*(rk + i) = x4
+
+#define DEC_ROUND(x0, x1, x2, x3, x4, i)	\
+	x4 = x1 ^ x2 ^ x3 ^ *(CK + i);		\
+	x4 = S32(x4);				\
+	x4 = x0 ^ L32_(x4);			\
+	*(rk + 31 - i) = x4
+
+void sms4_set_encrypt_key(sms4_key_t *key, const unsigned char *user_key)
+{
+	uint32_t *rk = key->rk;
+	uint32_t x0, x1, x2, x3, x4;
+
+	x0 = GET32(user_key     ) ^ FK[0];
+	x1 = GET32(user_key  + 4) ^ FK[1];
+	x2 = GET32(user_key  + 8) ^ FK[2];
+	x3 = GET32(user_key + 12) ^ FK[3];
+
+#define ROUND ENC_ROUND
+	ROUNDS(x0, x1, x2, x3, x4);
+
+	x0 = x1 = x2 = x3 = x4 = 0;
+}
+
+void sms4_set_decrypt_key(sms4_key_t *key, const unsigned char *user_key)
+{
+	uint32_t *rk = key->rk;
+	uint32_t x0, x1, x2, x3, x4;
+
+	x0 = GET32(user_key     ) ^ FK[0];
+	x1 = GET32(user_key  + 4) ^ FK[1];
+	x2 = GET32(user_key  + 8) ^ FK[2];
+	x3 = GET32(user_key + 12) ^ FK[3];
+
+#undef ROUND
+#define ROUND DEC_ROUND
+	ROUNDS(x0, x1, x2, x3, x4);
+
+	x0 = x1 = x2 = x3 = x4 = 0;
+}