Header And Logo
|
#include "postgres.h"#include "px.h"#include "mbuf.h"#include "pgp.h"
Go to the source code of this file.
Functions | |
| static int | calc_s2k_simple (PGP_S2K *s2k, PX_MD *md, const uint8 *key, unsigned key_len) |
| static int | calc_s2k_salted (PGP_S2K *s2k, PX_MD *md, const uint8 *key, unsigned key_len) |
| static int | calc_s2k_iter_salted (PGP_S2K *s2k, PX_MD *md, const uint8 *key, unsigned key_len) |
| static int | decide_count (unsigned rand_byte) |
| int | pgp_s2k_fill (PGP_S2K *s2k, int mode, int digest_algo) |
| int | pgp_s2k_read (PullFilter *src, PGP_S2K *s2k) |
| int | pgp_s2k_process (PGP_S2K *s2k, int cipher, const uint8 *key, int key_len) |
| static int calc_s2k_iter_salted | ( | PGP_S2K * | s2k, | |
| PX_MD * | md, | |||
| const uint8 * | key, | |||
| unsigned | key_len | |||
| ) | [static] |
Definition at line 125 of file pgp-s2k.c.
References buf, PGP_S2K::iter, PGP_S2K::key, PGP_S2K::key_len, PGP_S2K_SALT, px_md_finish, px_md_reset, px_md_result_size, px_md_update, and PGP_S2K::salt.
Referenced by pgp_s2k_process().
{
unsigned md_rlen;
uint8 buf[PGP_MAX_DIGEST];
uint8 *dst;
unsigned preload = 0;
unsigned remain,
c,
cval,
curcnt,
count;
cval = s2k->iter;
count = ((unsigned) 16 + (cval & 15)) << ((cval >> 4) + 6);
md_rlen = px_md_result_size(md);
remain = s2k->key_len;
dst = s2k->key;
while (remain > 0)
{
px_md_reset(md);
if (preload)
{
memset(buf, 0, preload);
px_md_update(md, buf, preload);
}
preload++;
px_md_update(md, s2k->salt, PGP_S2K_SALT);
px_md_update(md, key, key_len);
curcnt = PGP_S2K_SALT + key_len;
while (curcnt < count)
{
if (curcnt + PGP_S2K_SALT < count)
c = PGP_S2K_SALT;
else
c = count - curcnt;
px_md_update(md, s2k->salt, c);
curcnt += c;
if (curcnt + key_len < count)
c = key_len;
else if (curcnt < count)
c = count - curcnt;
else
break;
px_md_update(md, key, c);
curcnt += c;
}
px_md_finish(md, buf);
if (remain > md_rlen)
{
memcpy(dst, buf, md_rlen);
remain -= md_rlen;
dst += md_rlen;
}
else
{
memcpy(dst, buf, remain);
remain = 0;
}
}
return 0;
}
| static int calc_s2k_salted | ( | PGP_S2K * | s2k, | |
| PX_MD * | md, | |||
| const uint8 * | key, | |||
| unsigned | key_len | |||
| ) | [static] |
Definition at line 82 of file pgp-s2k.c.
References buf, PGP_S2K::key, PGP_S2K::key_len, PGP_S2K_SALT, px_md_finish, px_md_reset, px_md_result_size, px_md_update, and PGP_S2K::salt.
Referenced by pgp_s2k_process().
{
unsigned md_rlen;
uint8 buf[PGP_MAX_DIGEST];
unsigned preload = 0;
uint8 *dst;
unsigned remain;
md_rlen = px_md_result_size(md);
dst = s2k->key;
remain = s2k->key_len;
while (remain > 0)
{
px_md_reset(md);
if (preload > 0)
{
memset(buf, 0, preload);
px_md_update(md, buf, preload);
}
preload++;
px_md_update(md, s2k->salt, PGP_S2K_SALT);
px_md_update(md, key, key_len);
px_md_finish(md, buf);
if (remain > md_rlen)
{
memcpy(dst, buf, md_rlen);
remain -= md_rlen;
dst += md_rlen;
}
else
{
memcpy(dst, buf, remain);
remain = 0;
}
}
return 0;
}
| static int calc_s2k_simple | ( | PGP_S2K * | s2k, | |
| PX_MD * | md, | |||
| const uint8 * | key, | |||
| unsigned | key_len | |||
| ) | [static] |
Definition at line 39 of file pgp-s2k.c.
References buf, PGP_S2K::key, PGP_S2K::key_len, px_md_finish, px_md_reset, px_md_result_size, and px_md_update.
Referenced by pgp_s2k_process().
{
unsigned md_rlen;
uint8 buf[PGP_MAX_DIGEST];
unsigned preload;
unsigned remain;
uint8 *dst = s2k->key;
md_rlen = px_md_result_size(md);
remain = s2k->key_len;
preload = 0;
while (remain > 0)
{
px_md_reset(md);
if (preload)
{
memset(buf, 0, preload);
px_md_update(md, buf, preload);
}
preload++;
px_md_update(md, key, key_len);
px_md_finish(md, buf);
if (remain > md_rlen)
{
memcpy(dst, buf, md_rlen);
dst += md_rlen;
remain -= md_rlen;
}
else
{
memcpy(dst, buf, remain);
remain = 0;
}
}
return 0;
}
| static int decide_count | ( | unsigned | rand_byte | ) | [static] |
Definition at line 204 of file pgp-s2k.c.
Referenced by pgp_s2k_fill().
{
return 96 + (rand_byte & 0x1F);
}
| int pgp_s2k_fill | ( | PGP_S2K * | s2k, | |
| int | mode, | |||
| int | digest_algo | |||
| ) |
Definition at line 210 of file pgp-s2k.c.
References decide_count(), PGP_S2K::digest_algo, PGP_S2K::iter, PGP_S2K::mode, PGP_S2K_SALT, px_get_pseudo_random_bytes(), and PGP_S2K::salt.
Referenced by init_s2k_key().
{
int res = 0;
uint8 tmp;
s2k->mode = mode;
s2k->digest_algo = digest_algo;
switch (s2k->mode)
{
case 0:
break;
case 1:
res = px_get_pseudo_random_bytes(s2k->salt, PGP_S2K_SALT);
break;
case 3:
res = px_get_pseudo_random_bytes(s2k->salt, PGP_S2K_SALT);
if (res < 0)
break;
res = px_get_pseudo_random_bytes(&tmp, 1);
if (res < 0)
break;
s2k->iter = decide_count(tmp);
break;
default:
res = PXE_PGP_BAD_S2K_MODE;
}
return res;
}
Definition at line 267 of file pgp-s2k.c.
References calc_s2k_iter_salted(), calc_s2k_salted(), calc_s2k_simple(), PGP_S2K::digest_algo, PGP_S2K::key_len, PGP_S2K::mode, pgp_get_cipher_key_size(), pgp_load_digest(), and px_md_free.
Referenced by init_s2k_key(), parse_symenc_sesskey(), and process_secret_key().
{
int res;
PX_MD *md;
s2k->key_len = pgp_get_cipher_key_size(cipher);
if (s2k->key_len <= 0)
return PXE_PGP_UNSUPPORTED_CIPHER;
res = pgp_load_digest(s2k->digest_algo, &md);
if (res < 0)
return res;
switch (s2k->mode)
{
case 0:
res = calc_s2k_simple(s2k, md, key, key_len);
break;
case 1:
res = calc_s2k_salted(s2k, md, key, key_len);
break;
case 3:
res = calc_s2k_iter_salted(s2k, md, key, key_len);
break;
default:
res = PXE_PGP_BAD_S2K_MODE;
}
px_md_free(md);
return res;
}
| int pgp_s2k_read | ( | PullFilter * | src, | |
| PGP_S2K * | s2k | |||
| ) |
Definition at line 241 of file pgp-s2k.c.
References PGP_S2K::digest_algo, GETBYTE, PGP_S2K::iter, PGP_S2K::mode, pullf_read_fixed(), and PGP_S2K::salt.
Referenced by parse_symenc_sesskey(), and process_secret_key().
{
int res = 0;
GETBYTE(src, s2k->mode);
GETBYTE(src, s2k->digest_algo);
switch (s2k->mode)
{
case 0:
break;
case 1:
res = pullf_read_fixed(src, 8, s2k->salt);
break;
case 3:
res = pullf_read_fixed(src, 8, s2k->salt);
if (res < 0)
break;
GETBYTE(src, s2k->iter);
break;
default:
res = PXE_PGP_BAD_S2K_MODE;
}
return res;
}
1.7.1