diff options
Diffstat (limited to 'missing/crypt.c')
| -rw-r--r-- | missing/crypt.c | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/missing/crypt.c b/missing/crypt.c deleted file mode 100644 index 9f9b562c36..0000000000 --- a/missing/crypt.c +++ /dev/null @@ -1,276 +0,0 @@ -/* From Andy Tanenbaum's book "Computer Networks", - rewritten in C -*/ - -struct block { - unsigned char b_data[64]; -}; - -struct ordering { - unsigned char o_data[64]; -}; - -static struct block key; - -static struct ordering InitialTr = { - 58,50,42,34,26,18,10, 2,60,52,44,36,28,20,12, 4, - 62,54,46,38,30,22,14, 6,64,56,48,40,32,24,16, 8, - 57,49,41,33,25,17, 9, 1,59,51,43,35,27,19,11, 3, - 61,53,45,37,29,21,13, 5,63,55,47,39,31,23,15, 7, -}; - -static struct ordering FinalTr = { - 40, 8,48,16,56,24,64,32,39, 7,47,15,55,23,63,31, - 38, 6,46,14,54,22,62,30,37, 5,45,13,53,21,61,29, - 36, 4,44,12,52,20,60,28,35, 3,43,11,51,19,59,27, - 34, 2,42,10,50,18,58,26,33, 1,41, 9,49,17,57,25, -}; - -static struct ordering swap = { - 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48, - 49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64, - 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,16, - 17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32, -}; - -static struct ordering KeyTr1 = { - 57,49,41,33,25,17, 9, 1,58,50,42,34,26,18, - 10, 2,59,51,43,35,27,19,11, 3,60,52,44,36, - 63,55,47,39,31,23,15, 7,62,54,46,38,30,22, - 14, 6,61,53,45,37,29,21,13, 5,28,20,12, 4, -}; - -static struct ordering KeyTr2 = { - 14,17,11,24, 1, 5, 3,28,15, 6,21,10, - 23,19,12, 4,26, 8,16, 7,27,20,13, 2, - 41,52,31,37,47,55,30,40,51,45,33,48, - 44,49,39,56,34,53,46,42,50,36,29,32, -}; - -static struct ordering etr = { - 32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9, - 8, 9,10,11,12,13,12,13,14,15,16,17, - 16,17,18,19,20,21,20,21,22,23,24,25, - 24,25,26,27,28,29,28,29,30,31,32, 1, -}; - -static struct ordering ptr = { - 16, 7,20,21,29,12,28,17, 1,15,23,26, 5,18,31,10, - 2, 8,24,14,32,27, 3, 9,19,13,30, 6,22,11, 4,25, -}; - -static unsigned char s_boxes[8][64] = { -{ 14, 4,13, 1, 2,15,11, 8, 3,10, 6,12, 5, 9, 0, 7, - 0,15, 7, 4,14, 2,13, 1,10, 6,12,11, 9, 5, 3, 8, - 4, 1,14, 8,13, 6, 2,11,15,12, 9, 7, 3,10, 5, 0, - 15,12, 8, 2, 4, 9, 1, 7, 5,11, 3,14,10, 0, 6,13, -}, - -{ 15, 1, 8,14, 6,11, 3, 4, 9, 7, 2,13,12, 0, 5,10, - 3,13, 4, 7,15, 2, 8,14,12, 0, 1,10, 6, 9,11, 5, - 0,14, 7,11,10, 4,13, 1, 5, 8,12, 6, 9, 3, 2,15, - 13, 8,10, 1, 3,15, 4, 2,11, 6, 7,12, 0, 5,14, 9, -}, - -{ 10, 0, 9,14, 6, 3,15, 5, 1,13,12, 7,11, 4, 2, 8, - 13, 7, 0, 9, 3, 4, 6,10, 2, 8, 5,14,12,11,15, 1, - 13, 6, 4, 9, 8,15, 3, 0,11, 1, 2,12, 5,10,14, 7, - 1,10,13, 0, 6, 9, 8, 7, 4,15,14, 3,11, 5, 2,12, -}, - -{ 7,13,14, 3, 0, 6, 9,10, 1, 2, 8, 5,11,12, 4,15, - 13, 8,11, 5, 6,15, 0, 3, 4, 7, 2,12, 1,10,14, 9, - 10, 6, 9, 0,12,11, 7,13,15, 1, 3,14, 5, 2, 8, 4, - 3,15, 0, 6,10, 1,13, 8, 9, 4, 5,11,12, 7, 2,14, -}, - -{ 2,12, 4, 1, 7,10,11, 6, 8, 5, 3,15,13, 0,14, 9, - 14,11, 2,12, 4, 7,13, 1, 5, 0,15,10, 3, 9, 8, 6, - 4, 2, 1,11,10,13, 7, 8,15, 9,12, 5, 6, 3, 0,14, - 11, 8,12, 7, 1,14, 2,13, 6,15, 0, 9,10, 4, 5, 3, -}, - -{ 12, 1,10,15, 9, 2, 6, 8, 0,13, 3, 4,14, 7, 5,11, - 10,15, 4, 2, 7,12, 9, 5, 6, 1,13,14, 0,11, 3, 8, - 9,14,15, 5, 2, 8,12, 3, 7, 0, 4,10, 1,13,11, 6, - 4, 3, 2,12, 9, 5,15,10,11,14, 1, 7, 6, 0, 8,13, -}, - -{ 4,11, 2,14,15, 0, 8,13, 3,12, 9, 7, 5,10, 6, 1, - 13, 0,11, 7, 4, 9, 1,10,14, 3, 5,12, 2,15, 8, 6, - 1, 4,11,13,12, 3, 7,14,10,15, 6, 8, 0, 5, 9, 2, - 6,11,13, 8, 1, 4,10, 7, 9, 5, 0,15,14, 2, 3,12, -}, - -{ 13, 2, 8, 4, 6,15,11, 1,10, 9, 3,14, 5, 0,12, 7, - 1,15,13, 8,10, 3, 7, 4,12, 5, 6,11, 0,14, 9, 2, - 7,11, 4, 1, 9,12,14, 2, 0, 6,10,13,15, 3, 5, 8, - 2, 1,14, 7, 4,10, 8,13,15,12, 9, 0, 3, 5, 6,11, -}, -}; - -static int rots[] = { - 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1, -}; - -static void transpose(struct block *data, struct ordering *t, int n) -{ - struct block x; - - x = *data; - - while (n-- > 0) { - data->b_data[n] = x.b_data[t->o_data[n] - 1]; - } -} - -static void rotate(struct block *key) -{ - register unsigned char *p = key->b_data; - register unsigned char *ep = &(key->b_data[55]); - int data0 = key->b_data[0], data28 = key->b_data[28]; - - while (p++ < ep) *(p-1) = *p; - key->b_data[27] = (char) data0; - key->b_data[55] = (char) data28; -} - -static struct ordering *EP = &etr; - -static void f(int i, struct block *key, struct block *a, struct block *x) -{ - struct block e, ikey, y; - int k; - register unsigned char *p, *q, *r; - - e = *a; - transpose(&e, EP, 48); - for (k = rots[i]; k; k--) rotate(key); - ikey = *key; - transpose(&ikey, &KeyTr2, 48); - p = &(y.b_data[48]); - q = &(e.b_data[48]); - r = &(ikey.b_data[48]); - while (p > y.b_data) { - *--p = *--q ^ *--r; - } - q = x->b_data; - for (k = 0; k < 8; k++) { - register int xb, r; - - r = *p++ << 5; - r += *p++ << 3; - r += *p++ << 2; - r += *p++ << 1; - r += *p++; - r += *p++ << 4; - - xb = s_boxes[k][r]; - - *q++ = (char) (xb >> 3) & 1; - *q++ = (char) (xb>>2) & 1; - *q++ = (char) (xb>>1) & 1; - *q++ = (char) (xb & 1); - } - transpose(x, &ptr, 32); -} - -void definekey(char *k) -{ - - key = *((struct block *) k); - transpose(&key, &KeyTr1, 56); -} - -void encrypt(char *blck, int edflag) -{ - register struct block *p = (struct block *) blck; - register int i; - - transpose(p, &InitialTr, 64); - for (i = 15; i>= 0; i--) { - int j = edflag ? i : 15 - i; - register int k; - struct block b, x; - - b = *p; - for (k = 31; k >= 0; k--) { - p->b_data[k] = b.b_data[k + 32]; - } - f(j, &key, p, &x); - for (k = 31; k >= 0; k--) { - p->b_data[k+32] = b.b_data[k] ^ x.b_data[k]; - } - } - transpose(p, &swap, 64); - transpose(p, &FinalTr, 64); -} - -char *crypt(char *pw, char *salt) -{ - - char pwb[66]; - static char result[16]; - register char *p = pwb; - struct ordering new_etr; - register int i; - - while (*pw && p < &pwb[64]) { - register int j = 7; - - while (j--) { - *p++ = (*pw >> j) & 01; - } - pw++; - *p++ = 0; - } - while (p < &pwb[64]) *p++ = 0; - - definekey(p = pwb); - - while (p < &pwb[66]) *p++ = 0; - - new_etr = etr; - EP = &new_etr; - for (i = 0; i < 2; i++) { - register char c = *salt++; - register int j; - - result[i] = c; - if ( c > 'Z') c -= 6 + 7 + '.'; /* c was a lower case letter */ - else if ( c > '9') c -= 7 + '.';/* c was upper case letter */ - else c -= '.'; /* c was digit, '.' or '/'. */ - /* now, 0 <= c <= 63 */ - for (j = 0; j < 6; j++) { - if ((c >> j) & 01) { - int t = 6*i + j; - int temp = new_etr.o_data[t]; - new_etr.o_data[t] = new_etr.o_data[t+24]; - new_etr.o_data[t+24] = (char) temp; - } - } - } - - if (result[1] == 0) result[1] = result[0]; - - for (i = 0; i < 25; i++) encrypt(pwb,0); - EP = &etr; - - p = pwb; - pw = result+2; - while (p < &pwb[66]) { - register int c = 0; - register int j = 6; - - while (j--) { - c <<= 1; - c |= *p++; - } - c += '.'; /* becomes >= '.' */ - if (c > '9') c += 7; /* not in [./0-9], becomes upper */ - if (c > 'Z') c += 6; /* not in [A-Z], becomes lower */ - *pw++ = (char) c; - } - *pw = 0; - return result; -} |