Subversion Repositories rtea

#define KEY     (256/32)

#define ROUND   ((32 + KEY*4) - 1)

unsigned int    a, b, c;

unsigned int    key[KEY] = {

    0xddeeff00, 0x99aabbcc,

    0x55667788, 0x11223344

};

void crypt() {

    char r;

    for (r=0; r <= ROUND; r++) {

        c = b;

        b = b + (a + ((b<<6)^(b>>8)) + key[r % KEY] + r);

        a = c;

        printf("%02i %08lX %08lX\n", r, a, b);

    }

}

void decrypt() {

    char r;

    for (r = ROUND; r>=0; r--) {

        c = a;

        a = b - (a + ((a<<6)^(a>>8)) + key[r % KEY] + r);

        b = c;

        printf("%02i %08lX %08lX\n", r, a, b);

    }

}

int main() {

    memset(key, 0 , sizeof(key));

    a = 0x12345678;

    b = 0x11112222;

    printf(">>>\n");

    crypt();

    a = 0x12345678;

    b = 0x11112222;

    printf("<<<\n");

    decrypt();

    return 0;

}