* THIS ONLY WORKS FOR LITTEL ENDIAN!!!
*/
- #include <stdint.h>
- #include <stdlib.h>
- #include "rc6.h"
- #include "config.h"
+#include <stdint.h>
+#include <stdlib.h>
+#include "rc6.h"
+#include "config.h"
- #define P32 0xB7E15163 /* e -2 */
- #define Q32 0x9E3779B9 /* Golden Ratio -1 */
+#define P32 0xB7E15163 /* e -2 */
+#define Q32 0x9E3779B9 /* Golden Ratio -1 */
uint32_t rotl32(uint32_t a, uint8_t n){
n &= 0x1f; /* higher rotates would not bring anything */
return ( (a<<n)| (a>>(32-n)) );
- }
+}
uint32_t rotr32(uint32_t a, uint8_t n){
n &= 0x1f; /* higher rotates would not bring anything */
return ( (a>>n)| (a<<(32-n)) );
- }
+}
- uint8_t rc6_init(rc6_ctx_t *s,void* key, uint16_t keylength){
- return rc6_initl(s, key, keylength, 20);
- }
+uint8_t rc6_init(void* key, uint16_t keylength_b, rc6_ctx_t *s){
+ return rc6_initl(key, keylength_b, 20, s);
+}
- uint8_t rc6_initl(rc6_ctx_t *s,void* key, uint16_t keylength, uint8_t rounds){
+uint8_t rc6_initl(void* key, uint16_t keylength_b, uint8_t rounds, rc6_ctx_t *s){
uint8_t i,j;
uint16_t v,p,c;
uint32_t a,b, l=0;
s->rounds=rounds;
- c = keylength/32;
- if (keylength%32){
+ c = keylength_b/32;
+ if (keylength_b%32){
++c;
- j=(keylength%32)/8;
- if(keylength%8)
+ j=(keylength_b%32)/8;
+ if(keylength_b%8)
++j;
for (i=0; i<j; ++i)
((uint8_t*)&l)[i] = ((uint8_t*)key)[(c-1)*4 + i];
j = (j+1) % c;
}
return 0;
- }
+}
- void rc6_free(rc6_ctx_t *s){
+void rc6_free(rc6_ctx_t *s){
free(s->S);
- }
+}
- #define LG_W 5
- #define A (((uint32_t*)block)[0])
- #define B (((uint32_t*)block)[1])
- #define C (((uint32_t*)block)[2])
- #define D (((uint32_t*)block)[3])
+#define LG_W 5
+#define A (((uint32_t*)block)[0])
+#define B (((uint32_t*)block)[1])
+#define C (((uint32_t*)block)[2])
+#define D (((uint32_t*)block)[3])
- void rc6_enc(rc6_ctx_t *s, void* block){
+void rc6_enc(void* block, rc6_ctx_t *s){
uint8_t i;
uint32_t t,u,x; /* greetings to Linux? */
B += s->S[0];
}
A += s->S[2*s->rounds+2];
C += s->S[2*s->rounds+3];
- }
+}
- void rc6_dec(rc6_ctx_t *s, void* block)
- {
+void rc6_dec(void* block, rc6_ctx_t *s){
uint8_t i;
uint32_t t,u,x; /* greetings to Linux? */
}
D -= s->S[1];
B -= s->S[0];
- }
+}