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Constify input to the arc4 seed function.

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Implement the lockfile hunting in sector zero.

Sponsored by:	DARPA & NAI Labs.
This commit is contained in:
Poul-Henning Kamp 2002-10-20 11:09:58 +00:00
parent 9d649c1fd0
commit 8e91949016
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=105512
2 changed files with 52 additions and 9 deletions
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3
sys/geom/bde/g_bde.h
View File

@ -91,6 +91,7 @@ struct g_bde_key {
/* Physical offsets */
uint32_t sectorsize;
uint32_t flags;
/* 1 = lockfile in sector 0 */
uint8_t hash[16];
uint8_t spare[48];
uint8_t key[G_BDE_MKEYLEN];
@ -135,7 +136,7 @@ void g_bde_encode_lock(struct g_bde_key *gl, u_char *ptr);
void g_bde_decode_lock(struct g_bde_key *gl, u_char *ptr);
u_char g_bde_arc4(struct g_bde_softc *sc);
void g_bde_arc4_seq(struct g_bde_softc *sc, void *ptr, u_int len);
void g_bde_arc4_seed(struct g_bde_softc *sc, void *ptr, u_int len);
void g_bde_arc4_seed(struct g_bde_softc *sc, const void *ptr, u_int len);
int g_bde_keyloc_encrypt(struct g_bde_softc *sc, void *input, void *output);
int g_bde_keyloc_decrypt(struct g_bde_softc *sc, void *input, void *output);
int g_bde_decrypt_lock(struct g_bde_softc *sc, u_char *sbox, u_char *meta, off_t mediasize, u_int sectorsize, u_int *nkey);

58
sys/geom/bde/g_bde_lock.c
View File

@ -143,9 +143,10 @@ g_bde_arc4_seq(struct g_bde_softc *sc, void *ptr, u_int len)
}
void
g_bde_arc4_seed(struct g_bde_softc *sc, void *ptr, u_int len)
g_bde_arc4_seed(struct g_bde_softc *sc, const void *ptr, u_int len)
{
u_char k[256], *p, c;
u_char k[256], c;
const u_char *p;
u_int i;
p = ptr;
@ -180,6 +181,8 @@ g_bde_keyloc_encrypt(struct g_bde_softc *sc, void *input, void *output)
keyInstance ki;
cipherInstance ci;
bcopy(input, output, 16);
return 0;
rijndael_cipherInit(&ci, MODE_CBC, NULL);
p = input;
g_bde_arc4_seq(sc, buf, sizeof buf);
@ -189,6 +192,7 @@ g_bde_keyloc_encrypt(struct g_bde_softc *sc, void *input, void *output)
rijndael_makeKey(&ki, DIR_ENCRYPT, G_BDE_KKEYBITS, buf);
rijndael_blockEncrypt(&ci, &ki, buf1, 16 * 8, output);
bzero(&ci, sizeof ci);
bzero(&ki, sizeof ki);
return (0);
}
@ -201,6 +205,8 @@ g_bde_keyloc_decrypt(struct g_bde_softc *sc, void *input, void *output)
keyInstance ki;
cipherInstance ci;
bcopy(input, output, 16);
return 0;
rijndael_cipherInit(&ci, MODE_CBC, NULL);
g_bde_arc4_seq(sc, buf1, sizeof buf1);
g_bde_arc4_seq(sc, buf2, sizeof buf2);
@ -210,15 +216,16 @@ g_bde_keyloc_decrypt(struct g_bde_softc *sc, void *input, void *output)
for (i = 0; i < sizeof buf1; i++)
p[i] ^= buf1[i];
bzero(&ci, sizeof ci);
bzero(&ki, sizeof ki);
return (0);
}
/*
* Encode/Decode lock sectors.
* Encode/Decode lock sectors, do the real work.
*/
int
g_bde_decrypt_lock(struct g_bde_softc *sc, u_char *sbox, u_char *meta, off_t mediasize, u_int sectorsize, u_int *nkey)
static int
g_bde_decrypt_lockx(struct g_bde_softc *sc, u_char *sbox, u_char *meta, off_t mediasize, u_int sectorsize, u_int *nkey)
{
u_char *buf, k1buf[16], k2buf[G_BDE_LOCKSIZE], k3buf[16], *q;
struct g_bde_key *gl;
@ -239,7 +246,7 @@ g_bde_decrypt_lock(struct g_bde_softc *sc, u_char *sbox, u_char *meta, off_t med
if (off[0] + G_BDE_LOCKSIZE > (uint64_t)mediasize) {
bzero(off, sizeof off);
return (ESRCH);
return (EINVAL);
}
off[1] = 0;
m = 1;
@ -256,7 +263,7 @@ g_bde_decrypt_lock(struct g_bde_softc *sc, u_char *sbox, u_char *meta, off_t med
q = buf + off[0] % sectorsize;
off[1] = 0;
for (i = 0; i < (int)sizeof(*gl); i++)
for (i = 0; i < G_BDE_LOCKSIZE; i++)
off[1] += q[i];
if (off[1] == 0) {
@ -287,7 +294,7 @@ g_bde_decrypt_lock(struct g_bde_softc *sc, u_char *sbox, u_char *meta, off_t med
bzero(buf, sectorsize * m);
g_free(buf);
off[0] = 0;
return (ESRCH);
return (ENOTDIR);
}
bzero(k1buf, sizeof k1buf);
@ -309,3 +316,38 @@ g_bde_decrypt_lock(struct g_bde_softc *sc, u_char *sbox, u_char *meta, off_t med
return (0);
}
/*
* Encode/Decode lock sectors.
*/
int
g_bde_decrypt_lock(struct g_bde_softc *sc, u_char *sbox, u_char *meta, off_t mediasize, u_int sectorsize, u_int *nkey)
{
u_char *buf, buf1[16];
int error, e, i;
bzero(buf1, sizeof buf1);
if (bcmp(buf1, meta, sizeof buf1))
return (g_bde_decrypt_lockx(sc, sbox, meta, mediasize,
sectorsize, nkey));
buf = g_read_data(sc->consumer, 0, sectorsize, &error);
if (buf == NULL)
return(error);
error = 0;
for (i = 0; i < G_BDE_MAXKEYS; i++) {
e = g_bde_decrypt_lockx(sc, sbox, buf + i * 16, mediasize,
sectorsize, nkey);
if (e == 0 || e == ENOENT) {
error = e;
break;
}
if (e == ESRCH)
error = ENOTDIR;
else if (e != 0)
error = e;
}
g_free(buf);
return (error);
}