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update speck module

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This commit is contained in:
Zhi Guan
2017-03-26 15:23:37 +08:00
parent 019924627e
commit 64cedcdf29
7 changed files with 45 additions and 9 deletions
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60
demos/mycipher/speck.c
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@@ -1,60 +0,0 @@
#include "speck.h"
#define ROR(x, r) ((x >> r) | (x << ((sizeof(SPECK_TYPE) * 8) - r)))//循环右移
#define ROL(x, r) ((x << r) | (x >> ((sizeof(SPECK_TYPE) * 8) - r)))//循环左移
#ifdef SPECK_32_64
#define R(x, y, k) (x = ROR(x, 7), x += y, x ^= k, y = ROL(y, 2), y ^= x)
#define RR(x, y, k) (y ^= x, y = ROR(y, 2), x ^= k, x -= y, x = ROL(x, 7))
#else
#define R(x, y, k) (x = ROR(x, 8), x += y, x ^= k, y = ROL(y, 3), y ^= x)
#define RR(x, y, k) (y ^= x, y = ROR(y, 3), x ^= k, x -= y, x = ROL(x, 8))
#endif
void mycipher_set_encrypt_key(mycipher_key_t *key, const unsigned char *user_key)
{
int i;
for (i = 0; i < num_word; i++)
{
if (user_key[i] == '\0')
break;
key->rk[i] = user_key[i];
}
int j = 0;
for (; i < num_word; i++)
{
key->rk[i] = user_key[j++];
}
}
void speck_expand(SPECK_TYPE const K[ SPECK_KEY_LEN], SPECK_TYPE S[ SPECK_ROUNDS])
{
SPECK_TYPE i, b = K[0];
SPECK_TYPE a[SPECK_KEY_LEN - 1];
for (i = 0; i < (SPECK_KEY_LEN - 1); i++)
{
a[i] = K[i + 1];
}
S[0] = b;
for (i = 0; i < SPECK_ROUNDS - 1; i++) {
R(a[i % (SPECK_KEY_LEN - 1)], b, i);
S[i + 1] = b;
}
}
void speck_encrypt(SPECK_TYPE const pt[ 2], SPECK_TYPE ct[ 2], SPECK_TYPE const K[ SPECK_ROUNDS])
{
SPECK_TYPE i;
ct[0] = pt[0]; ct[1] = pt[1];
for (i = 0; i < SPECK_ROUNDS; i++){
R(ct[1], ct[0], K[i]);
}
}
void speck_decrypt(SPECK_TYPE const ct[ 2], SPECK_TYPE pt[ 2], SPECK_TYPE const K[ SPECK_ROUNDS])
{
SPECK_TYPE i;
pt[0] = ct[0]; pt[1] = ct[1];
for (i = 0; i < SPECK_ROUNDS; i++){
RR(pt[1], pt[0], K[(SPECK_ROUNDS - 1) - i]);
}
}

48
demos/mycipher/speck.h
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@@ -1,48 +0,0 @@
#ifndef SPECK_H
#define SPECK_H
/*
* define speck type to use
*(one of SPECK_32_64, SPECK_64_128, SPECK_128_256)
*/
#define SPECK_32_64
#ifdef SPECK_32_64
#define SPECK_TYPE uint16_t
#define SPECK_ROUNDS 22
#define SPECK_KEY_LEN 4
#endif
#ifdef SPECK_64_128
#define SPECK_TYPE uint32_t
#define SPECK_ROUNDS 27
#define SPECK_KEY_LEN 4
#endif
#ifdef SPECK_128_256
#define SPECK_TYPE uint64_t
#define SPECK_ROUNDS 34
#define SPECK_KEY_LEN 4
#endif
#define num_word sizeof(SPECK_TYPE)
#include <sys/types.h>
#include <stdint.h>
#include <string.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
unsigned char rk[num_word];
} mycipher_key_t;
void mycipher_set_encrypt_key(mycipher_key_t *key, const unsigned char *user_key);
void speck_expand(SPECK_TYPE const K[SPECK_KEY_LEN], SPECK_TYPE S[SPECK_ROUNDS]);
void speck_encrypt(SPECK_TYPE const pt[2], SPECK_TYPE ct[2], SPECK_TYPE const K[SPECK_ROUNDS]);
void speck_decrypt(SPECK_TYPE const ct[2], SPECK_TYPE pt[2], SPECK_TYPE const K[SPECK_ROUNDS]);
#ifdef __cplusplus
}
#endif
#endif

22
demos/mycipher/specktest.c
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@@ -1,22 +0,0 @@
#include"speck.h"
int main(int argc, char **argv)
{
mycipher_key_t key;
unsigned char userkey[2] = { 0x01, 0x02, };
unsigned char msg[2] = { 0xab, 0xcd, };
SPECK_TYPE S[SPECK_ROUNDS];
unsigned char cbuf[2];
unsigned char mbuf[2];
mycipher_set_encrypt_key(&key, userkey);
speck_expand(&key, S);
speck_encrypt(msg, cbuf, S);
speck_decrypt(cbuf, mbuf, S);
if (memcmp(msg, mbuf, 2)) {
return -1;
}
return 0;
}