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update efficient rain option

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owein D 2020-09-29 21:01:13 +02:00
parent 3fa6d372cf
commit c65e3a26fc
2 changed files with 15 additions and 32 deletions
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44
bfg.c
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@ -60,7 +60,6 @@ static int32_t add_single_char(char ch, char flags, int32_t *crs_len) {
//
int32_t bf_init(char *arg) {
bf_options.rotate = 0;
bf_options.strafe = 0;
int32_t i = 0;
int32_t crs_len = 0;
@ -224,34 +223,16 @@ char *bf_next(_Bool rainy) {
if(rainy)
{
//only strafe the index above length 3
if(bf_options.current > 3) {
for(i=0; i<bf_options.current; ++i) {
bf_options.ptr[i] = bf_options.crs[(bf_options.state[(bf_options.strafe[loop]/(bf_options.current/4)+i) % bf_options.current] + bf_options.rotate) % bf_options.crs_len];
bf_options.rotate += (i+1)%(bf_options.current/2+1);
bf_options.strafe += 2 * (2-bf_options.current%2);
}
//the first character cannot be taken into account
bf_options.ptr[0] = bf_options.crs[bf_options.state[0]];
for(i=1; i<bf_options.current; ++i) {
bf_options.ptr[i] = bf_options.crs[(bf_options.state[i] + bf_options.rotate) % bf_options.crs_len];
bf_options.rotate += i+3;
}
else {
for(i=0; i<bf_options.current; ++i) {
bf_options.ptr[i] = bf_options.crs[(bf_options.state[i] + bf_options.rotate) % bf_options.crs_len];
bf_options.rotate += (i+1)%(bf_options.current/2+1);;
}
}
#define accu(i) \
do { \
int j; \
for(j=1; j<=i; ++j) k += j; \
} while(0)
int k = 0;
accu(bf_options.current);
bf_options.rotate -= k;
//we don't subtract the same depending on wether the length is odd or even
for(i=1+bf_options.current%2; i<=bf_options.current; ++i)
bf_options.rotate -= i+1;
}
else
for (i = 0; i < bf_options.current; i++)
bf_options.ptr[i] = bf_options.crs[bf_options.state[i]];
bf_options.ptr[bf_options.current] = 0;
if (debug) {
@ -261,11 +242,16 @@ char *bf_next(_Bool rainy) {
printf(", x: %s\n", bf_options.ptr);
}
//we revert the ordering of the bruteforce to fix the first static character
if(rainy)
while (pos >= 0 && (++bf_options.state[bf_options.current-1-pos]) >= bf_options.crs_len) {
bf_options.state[bf_options.current-1-pos] = 0;
pos--;
}
else
while (pos >= 0 && (++bf_options.state[pos]) >= bf_options.crs_len) {
bf_options.state[pos] = 0;
pos--;
bf_options.strafe = 0;
bf_options.rotate = 0;
}
if (pos < 0) {

3
bfg.h
View file

@ -43,10 +43,7 @@ typedef struct {
char *crs; /* internal representation of charset */
char *ptr; /* ptr to the last generated password */
uint32_t disable_symbols;
uint64_t rotate;
uint64_t strafe;
} bf_option;
extern bf_option bf_options;