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Apply some updates after doing some reverse engineering.

edge.strict_endians
antona 2005-07-20 10:59:06 +00:00
parent 0dac29a487
commit e55c6769e1
1 changed files with 19 additions and 24 deletions
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43
ntfsprogs/decrypt.c
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@ -76,8 +76,9 @@ static HMODULE hCrypt32 = INVALID_HANDLE_VALUE;
#include <malloc.h>
#include <string.h>
#define CALG_DESX (0x6603)
#define CALG_3DES (0x6604)
/* If not one of the below three, use standard Des. */
#define CALG_3DES (0x6603)
#define CALG_DESX (0x6604)
#define CALG_AES_256 (0x6610)
#endif /* defined(__CYGWIN__) */
@ -436,23 +437,16 @@ unsigned int decrypt_decrypt_sector(decrypt_key *key, void *data,
}
}
switch (dkey->gcry_algo) {
case GCRY_CIPHER_DES_SK:
// don't know!
case GCRY_CIPHER_3DES:
((unsigned long long *)data)[0] ^=
0x169119629891ad13LL + offset;
break;
case GCRY_CIPHER_AES256:
((unsigned long long *)data)[0] ^=
0x5816657be9161312LL + offset;
((unsigned long long *)data)[1] ^=
0x1989adbe44918961LL + offset;
break;
default:
break;
if (dkey->gcry_algo == GCRY_CIPHER_AES256) {
((unsigned long long *)data)[0] ^=
0x5816657be9161312LL + offset;
((unsigned long long *)data)[1] ^=
0x1989adbe44918961LL + offset;
} else {
/* All other algos (Des, 3Des, DesX) use the same IV. */
((unsigned long long *)data)[0] ^=
0x169119629891ad13LL + offset;
}
return 512;
}
@ -468,6 +462,7 @@ static decrypt_key *decrypt_make_gcry_key(char *key_data, int gcry_algo) {
switch (gcry_algo) {
case GCRY_CIPHER_DES_SK:
/* FIXME: This should be MODE_CBC, no? */
gcry_mode = GCRY_CIPHER_MODE_ECB;
gcry_length = 8;
break;
@ -480,6 +475,7 @@ static decrypt_key *decrypt_make_gcry_key(char *key_data, int gcry_algo) {
gcry_length = 32;
break;
default:
/* FIXME: This should use standard Des. */
errno = ENOTSUP;
return 0;
}
@ -501,9 +497,9 @@ static decrypt_key *decrypt_make_gcry_key(char *key_data, int gcry_algo) {
}
decrypt_key *decrypt_make_key(
decrypt_session *session __attribute__((unused)),
unsigned int data_size __attribute__((unused)),
void *data) {
decrypt_session *session __attribute__((unused)),
unsigned int data_size __attribute__((unused)),
void *data) {
unsigned int key_size, alg_id;
char *key_data;
@ -526,10 +522,9 @@ decrypt_key *decrypt_make_key(
return decrypt_make_gcry_key(key_data,
GCRY_CIPHER_AES256);
default:
fprintf(stderr, "Error: Unknown algorithm: 0x%x\n",
(unsigned int)alg_id);
//fprintf(stderr, "DES key of %u bytes\n", key_size);
fprintf(stderr, "DES is not supported yet.\n");
errno = ENOTSUP;
return NULL;
}
}