#include <afs/param.h>
#endif
-RCSID("$Header$");
+RCSID
+ ("$Header$");
#define DEBUG 0
#ifdef KERNEL
#define XPRT_FCRYPT
-int fc_keysched (struct ktc_encryptionKey *key,
- fc_KeySchedule schedule)
-{ unsigned char *keychar = (unsigned char *)key;
- afs_uint32 kword[2];
+int
+fc_keysched(struct ktc_encryptionKey *key, fc_KeySchedule schedule)
+{
+ unsigned char *keychar = (unsigned char *)key;
+ afs_uint32 kword[2];
- unsigned int temp;
- int i;
+ unsigned int temp;
+ int i;
/* first, flush the losing key parity bits. */
kword[0] = (*keychar++) >> 1;
kword[0] += (*keychar++) >> 1;
kword[0] <<= 7;
kword[0] += (*keychar++) >> 1;
- kword[1] = kword[0] >> 4; /* get top 24 bits for hi word */
+ kword[1] = kword[0] >> 4; /* get top 24 bits for hi word */
kword[0] &= 0xf;
kword[0] <<= 7;
kword[0] += (*keychar++) >> 1;
kword[0] += (*keychar) >> 1;
schedule[0] = kword[0];
- for (i=1; i<ROUNDS; i++) {
+ for (i = 1; i < ROUNDS; i++) {
/* rotate right 3 */
- temp = kword[0] & ((1<<11)-1); /* get 11 lsb */
- kword[0] = (kword[0] >> 11) | ((kword[1] & ((1<<11)-1)) << (32-11));
- kword[1] = (kword[1] >> 11) | (temp << (56-32-11));
+ temp = kword[0] & ((1 << 11) - 1); /* get 11 lsb */
+ kword[0] =
+ (kword[0] >> 11) | ((kword[1] & ((1 << 11) - 1)) << (32 - 11));
+ kword[1] = (kword[1] >> 11) | (temp << (56 - 32 - 11));
schedule[i] = kword[0];
}
- LOCK_RXKAD_STATS
- rxkad_stats.fc_key_scheds++;
- UNLOCK_RXKAD_STATS
- return 0;
+ LOCK_RXKAD_STATS rxkad_stats.fc_key_scheds++;
+ UNLOCK_RXKAD_STATS return 0;
}
/* IN int encrypt; * 0 ==> decrypt, else encrypt */
-afs_int32 fc_ecb_encrypt(afs_uint32 *clear, afs_uint32 *cipher,
- fc_KeySchedule schedule, int encrypt)
-{ afs_uint32 L,R;
- afs_uint32 S,P;
+afs_int32
+fc_ecb_encrypt(afs_uint32 * clear, afs_uint32 * cipher,
+ fc_KeySchedule schedule, int encrypt)
+{
+ afs_uint32 L, R;
+ afs_uint32 S, P;
unsigned char *Pchar = (unsigned char *)&P;
unsigned char *Schar = (unsigned char *)&S;
int i;
#if defined(vax) || (defined(mips) && defined(MIPSEL)) || defined(AFSLITTLE_ENDIAN)
-#define Byte0 3
+#define Byte0 3
#define Byte1 2
#define Byte2 1
#define Byte3 0
#if 0
memcpy(&L, clear, sizeof(afs_int32));
- memcpy(&R, clear+1, sizeof(afs_int32));
+ memcpy(&R, clear + 1, sizeof(afs_int32));
#else
L = ntohl(*clear);
- R = ntohl(*(clear+1));
+ R = ntohl(*(clear + 1));
#endif
if (encrypt) {
- LOCK_RXKAD_STATS
- rxkad_stats.fc_encrypts[ENCRYPT]++;
- UNLOCK_RXKAD_STATS
- for (i=0; i<(ROUNDS/2); i++) {
+ LOCK_RXKAD_STATS rxkad_stats.fc_encrypts[ENCRYPT]++;
+ UNLOCK_RXKAD_STATS for (i = 0; i < (ROUNDS / 2); i++) {
S = *schedule++ ^ R; /* xor R with key bits from schedule */
Pchar[Byte2] = sbox0[Schar[Byte0]]; /* do 8-bit S Box subst. */
Pchar[Byte3] = sbox1[Schar[Byte1]]; /* and permute the result */
Pchar[Byte1] = sbox2[Schar[Byte2]];
Pchar[Byte0] = sbox3[Schar[Byte3]];
- P = (P >> 5) | ((P & ((1<<5)-1)) << (32-5)); /* right rot 5 bits */
- L ^= P; /* we're done with L, so save there */
+ P = (P >> 5) | ((P & ((1 << 5) - 1)) << (32 - 5)); /* right rot 5 bits */
+ L ^= P; /* we're done with L, so save there */
S = *schedule++ ^ L; /* this time xor with L */
Pchar[Byte2] = sbox0[Schar[Byte0]];
Pchar[Byte3] = sbox1[Schar[Byte1]];
Pchar[Byte1] = sbox2[Schar[Byte2]];
Pchar[Byte0] = sbox3[Schar[Byte3]];
- P = (P >> 5) | ((P & ((1<<5)-1)) << (32-5)); /* right rot 5 bits */
+ P = (P >> 5) | ((P & ((1 << 5) - 1)) << (32 - 5)); /* right rot 5 bits */
R ^= P;
}
- }
- else {
- LOCK_RXKAD_STATS
- rxkad_stats.fc_encrypts[DECRYPT]++;
- UNLOCK_RXKAD_STATS
- schedule = &schedule[ROUNDS-1]; /* start at end of key schedule */
- for (i=0; i<(ROUNDS/2); i++) {
+ } else {
+ LOCK_RXKAD_STATS rxkad_stats.fc_encrypts[DECRYPT]++;
+ UNLOCK_RXKAD_STATS schedule = &schedule[ROUNDS - 1]; /* start at end of key schedule */
+ for (i = 0; i < (ROUNDS / 2); i++) {
S = *schedule-- ^ L; /* xor R with key bits from schedule */
Pchar[Byte2] = sbox0[Schar[Byte0]]; /* do 8-bit S Box subst. and */
Pchar[Byte3] = sbox1[Schar[Byte1]]; /* permute the result */
Pchar[Byte1] = sbox2[Schar[Byte2]];
Pchar[Byte0] = sbox3[Schar[Byte3]];
- P = (P >> 5) | ((P & ((1<<5)-1)) << (32-5)); /* right rot 5 bits */
- R ^= P; /* we're done with L, so save there */
+ P = (P >> 5) | ((P & ((1 << 5) - 1)) << (32 - 5)); /* right rot 5 bits */
+ R ^= P; /* we're done with L, so save there */
S = *schedule-- ^ R; /* this time xor with L */
Pchar[Byte2] = sbox0[Schar[Byte0]];
Pchar[Byte3] = sbox1[Schar[Byte1]];
Pchar[Byte1] = sbox2[Schar[Byte2]];
Pchar[Byte0] = sbox3[Schar[Byte3]];
- P = (P >> 5) | ((P & ((1<<5)-1)) << (32-5)); /* right rot 5 bits */
+ P = (P >> 5) | ((P & ((1 << 5) - 1)) << (32 - 5)); /* right rot 5 bits */
L ^= P;
}
}
#if 0
memcpy(cipher, &L, sizeof(afs_int32));
- memcpy(cipher+1, &R, sizeof(afs_int32));
+ memcpy(cipher + 1, &R, sizeof(afs_int32));
#else
*cipher = htonl(L);
- *(cipher+1) = htonl(R);
+ *(cipher + 1) = htonl(R);
#endif
return 0;
}
fc_KeySchedule key; * precomputed key schedule *
afs_uint32 *xor; * 8 bytes of initialization vector *
*/
-afs_int32 fc_cbc_encrypt (char *input, char *output, afs_int32 length,
- fc_KeySchedule key, afs_uint32 *xor, int encrypt)
-{ afs_uint32 i,j;
+afs_int32
+fc_cbc_encrypt(char *input, char *output, afs_int32 length,
+ fc_KeySchedule key, afs_uint32 * xor, int encrypt)
+{
+ afs_uint32 i, j;
afs_uint32 t_input[2];
afs_uint32 t_output[2];
- unsigned char *t_in_p = (unsigned char *) t_input;
+ unsigned char *t_in_p = (unsigned char *)t_input;
if (encrypt) {
for (i = 0; length > 0; i++, length -= 8) {
/* zero pad */
for (j = length; j <= 7; j++)
- *(t_in_p+j)= 0;
+ *(t_in_p + j) = 0;
/* do the xor for cbc into the temp */
- xor[0] ^= t_input[0] ;
- xor[1] ^= t_input[1] ;
+ xor[0] ^= t_input[0];
+ xor[1] ^= t_input[1];
/* encrypt */
- fc_ecb_encrypt (xor, t_output, key, encrypt);
+ fc_ecb_encrypt(xor, t_output, key, encrypt);
/* copy temp output and save it for cbc */
memcpy(output, t_output, sizeof(t_output));
}
t_output[0] = 0;
t_output[1] = 0;
- }
- else {
+ } else {
/* decrypt */
for (i = 0; length > 0; i++, length -= 8) {
/* get input */
fc_ecb_encrypt(t_input, t_output, key, encrypt);
/* do the xor for cbc into the output */
- t_output[0] ^= xor[0] ;
- t_output[1] ^= xor[1] ;
+ t_output[0] ^= xor[0];
+ t_output[1] ^= xor[1];
/* copy temp output */
memcpy(output, t_output, sizeof(t_output));
git://git.openafs.org / openafs.git / blobdiff