#include "k5-int.h"
#include "des_int.h"
#include <ctype.h>
#define afs_crypt mit_afs_crypt
char *afs_crypt (const char *, const char *, char *);
#undef min
#define min(a,b) ((a)>(b)?(b):(a))
krb5_error_code
mit_afs_string_to_key (keyblock, data, salt)
krb5_keyblock * keyblock;
const krb5_data * data;
const krb5_data * salt;
{
char *realm = salt->data;
unsigned int i, j;
krb5_octet *key = keyblock->contents;
if (data->length <= 8) {
unsigned char password[9];
char afs_crypt_buf[16];
memset (password, 0, sizeof (password));
memcpy (password, realm, min (salt->length, 8));
for (i=0; i<8; i++)
if (isupper(password[i]))
password[i] = tolower(password[i]);
for (i=0; i<data->length; i++)
password[i] ^= data->data[i];
for (i=0; i<8; i++)
if (password[i] == '\0')
password[i] = 'X';
password[8] = '\0';
strncpy((char *) key,
(char *) afs_crypt((char *) password, "#~", afs_crypt_buf) + 2,
8);
for (i=0; i<8; i++)
key[i] <<= 1;
mit_des_fixup_key_parity(key);
memset(password, 0, (size_t) sizeof(password));
} else {
mit_des_cblock ikey, tkey;
mit_des_key_schedule key_sked;
unsigned int pw_len = salt->length+data->length;
unsigned char *password = malloc(pw_len+1);
if (!password) return ENOMEM;
memcpy (password, data->data, data->length);
for (i=data->length, j = 0; j < salt->length; i++, j++) {
password[i] = realm[j];
if (isupper(password[i]))
password[i] = tolower(password[i]);
}
memcpy (ikey, "kerberos", sizeof(ikey));
memcpy (tkey, ikey, sizeof(tkey));
mit_des_fixup_key_parity (tkey);
(void) mit_des_key_sched (tkey, key_sked);
(void) mit_des_cbc_cksum (password, tkey, i, key_sked, ikey);
memcpy (ikey, tkey, sizeof(ikey));
mit_des_fixup_key_parity (tkey);
(void) mit_des_key_sched (tkey, key_sked);
(void) mit_des_cbc_cksum (password, key, i, key_sked, ikey);
memset((char *)key_sked, 0,sizeof(key_sked));
mit_des_fixup_key_parity(key);
memset(password, 0, (size_t) pw_len);
krb5_xfree(password);
}
#if 0
krb5_xfree(salt->data);
#endif
return 0;
}
static void krb5_afs_crypt_setkey (char*, char*, char(*)[48]);
static void krb5_afs_encrypt (char*,long,char*,char (*)[48]);
static const char IP[] = {
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 const char FP[] = {
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 const char PC1_C[] = {
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,
};
static const char PC1_D[] = {
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 const char shifts[] = {
1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1,
};
static const char PC2_C[] = {
14,17,11,24, 1, 5,
3,28,15, 6,21,10,
23,19,12, 4,26, 8,
16, 7,27,20,13, 2,
};
static const char PC2_D[] = {
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 const char e[] = {
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 const char P[] = {
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 const char S[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},
};
char *afs_crypt(pw, salt, iobuf)
const char *pw;
const char *salt;
char *iobuf;
{
int i, j, c;
int temp;
char block[66];
char E[48];
char KS[16][48];
for(i=0; i<66; i++)
block[i] = 0;
for(i=0; (c= *pw) && i<64; pw++){
for(j=0; j<7; j++, i++)
block[i] = (c>>(6-j)) & 01;
i++;
}
krb5_afs_crypt_setkey(block, E, KS);
for(i=0; i<66; i++)
block[i] = 0;
for(i=0;i<2;i++){
c = *salt++;
iobuf[i] = c;
if(c>'Z') c -= 6;
if(c>'9') c -= 7;
c -= '.';
for(j=0;j<6;j++){
if((c>>j) & 01){
temp = E[6*i+j];
E[6*i+j] = E[6*i+j+24];
E[6*i+j+24] = temp;
}
}
}
for(i=0; i<25; i++)
krb5_afs_encrypt(block,0,E,KS);
for(i=0; i<11; i++){
c = 0;
for(j=0; j<6; j++){
c <<= 1;
c |= block[6*i+j];
}
c += '.';
if(c>'9') c += 7;
if(c>'Z') c += 6;
iobuf[i+2] = c;
}
iobuf[i+2] = 0;
if(iobuf[1]==0)
iobuf[1] = iobuf[0];
return(iobuf);
}
static void krb5_afs_crypt_setkey(key, E, KS)
char *key;
char *E, (*KS)[48];
{
register int i, j, k;
int t;
char C[28], D[28];
for (i=0; i<28; i++) {
C[i] = key[PC1_C[i]-1];
D[i] = key[PC1_D[i]-1];
}
for (i=0; i<16; i++) {
for (k=0; k<shifts[i]; k++) {
t = C[0];
for (j=0; j<28-1; j++)
C[j] = C[j+1];
C[27] = t;
t = D[0];
for (j=0; j<28-1; j++)
D[j] = D[j+1];
D[27] = t;
}
for (j=0; j<24; j++) {
KS[i][j] = C[PC2_C[j]-1];
KS[i][j+24] = D[PC2_D[j]-28-1];
}
}
for(i=0;i<48;i++) {
E[i] = e[i];
}
}
static void krb5_afs_encrypt(block, edflag, E, KS)
char *block;
long edflag;
char *E, (*KS)[48];
{
int i, ii;
int t, j, k;
char tempL[32];
char f[32];
char L[64];
char *const R = &L[32];
char preS[48];
for (j=0; j<64; j++)
L[j] = block[IP[j]-1];
for (ii=0; ii<16; ii++) {
if (edflag)
i = 15-ii;
else
i = ii;
for (j=0; j<32; j++)
tempL[j] = R[j];
for (j=0; j<48; j++)
preS[j] = R[E[j]-1] ^ KS[i][j];
for (j=0; j<8; j++) {
t = 6*j;
k = S[j][(preS[t+0]<<5)+
(preS[t+1]<<3)+
(preS[t+2]<<2)+
(preS[t+3]<<1)+
(preS[t+4]<<0)+
(preS[t+5]<<4)];
t = 4*j;
f[t+0] = (k>>3)&01;
f[t+1] = (k>>2)&01;
f[t+2] = (k>>1)&01;
f[t+3] = (k>>0)&01;
}
for (j=0; j<32; j++)
R[j] = L[j] ^ f[P[j]-1];
for (j=0; j<32; j++)
L[j] = tempL[j];
}
for (j=0; j<32; j++) {
t = L[j];
L[j] = R[j];
R[j] = t;
}
for (j=0; j<64; j++)
block[j] = L[FP[j]-1];
}