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SM4/CTR

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This commit is contained in:
Zhi Guan
2016-04-18 13:41:56 +02:00
parent 37ac6cd45a
commit da6bb109b4
27 changed files with 1494 additions and 255 deletions
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50
crypto/zuc/zuc.c
View File

@@ -1,7 +1,7 @@
#include "../byteorder.h"
#include "zuc.h"
static uint8_t S0[256] = {
0x3e,0x72,0x5b,0x47,0xca,0xe0,0x00,0x33,0x04,0xd1,0x54,0x98,0x09,0xb9,0x6d,0xcb,
0x7b,0x1b,0xf9,0x32,0xaf,0x9d,0x6a,0xa5,0xb8,0x2d,0xfc,0x1d,0x08,0x53,0x03,0x90,
@@ -52,6 +52,7 @@ static inline uint32_t AddM(uint32_t a, uint32_t b)
}
#define MulByPow2(x, k) ((((x) << k) | ((x) >> (31 - k))) & 0x7FFFFFFF)
static void LFSRWithInitialisationMode(ZUC_KEY *key, uint32_t u)
{
uint32_t f, v;
@@ -171,7 +172,6 @@ void ZUC_set_key(ZUC_KEY *key, const unsigned char *k, const unsigned char *iv)
{
uint32_t w, nCount;
/* expand key */
key->LFSR_S0 = MAKEU31(k[0], EK_d[0], iv[0]);
key->LFSR_S1 = MAKEU31(k[1], EK_d[1], iv[1]);
key->LFSR_S2 = MAKEU31(k[2], EK_d[2], iv[2]);
@@ -189,48 +189,46 @@ void ZUC_set_key(ZUC_KEY *key, const unsigned char *k, const unsigned char *iv)
key->LFSR_S14 = MAKEU31(k[14], EK_d[14], iv[14]);
key->LFSR_S15 = MAKEU31(k[15], EK_d[15], iv[15]);
/* set F_R1 and F_R2 to zero */
key->F_R1 = 0;
key->F_R2 = 0;
nCount = 32;
while (nCount > 0)
{
while (nCount > 0) {
BitReorganization(key);
w = F(key);
LFSRWithInitialisationMode(key, w >> 1);
nCount--;
}
/* set buffer */
key->buflen = 0;
BitReorganization(key);
F(key);
LFSRWithWorkMode(key);
}
void ZUC_encrypt(ZUC_KEY *key, size_t inlen, const unsigned char *in, unsigned char *out)
{
#if 0
int i;
uint32_t word;
if (key->buflen) {
int len = inlen < 4 - key->buflen ? inlen : 4 - key->buflen;
memcpy(key->buf + key->buflen, in, len);
inlen -= len;
if (key->buflen == 4) {
}
}
if (inlen < 4) {
/*
while (key->buf_index < 4 && inlen > 0) {
*out++ = *in++ ^ key->buf[key->buf_index++];
inlen--;
}
BitReorganization(key);
F(key); /* discard the output of F */
LFSRWithWorkMode(key);
for (i = 0; i < KeystreamLen; i ++)
{
while (inlen >= 4) {
BitReorganization(key);
pKeystream[i] = F(key) ^ key->BRC_X3;
word = le32_to_cpu((uint32_t *)in);
word ^= F(key) ^ key->BRC_X3;
*((uint32_t *)out) = cpu_to_le32(word);
LFSRWithWorkMode(key);
inlen -= 4;
}
#endif
while (inlen-- > 0) {
*out++ = *in++ ^ *buf++;
key->buflen--;
}
*/
}

2
crypto/zuc/zuc.h
View File

@@ -39,7 +39,7 @@ typedef struct {
/* word buffer */
unsigned char buf[4];
int buflen;
int buf_index;
} ZUC_KEY;