oysteikt/heimdal
0
0
Fork 0
Code Issues 5 Pull Requests Releases Activity

Add default seed.

Browse Source 
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@40 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Björn Groenvall
1995-07-11 17:36:08 +00:00
parent 21c91d2472
commit 57828f6684
1 changed files with 16 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
lib/des/rnd_keys.c
View File

@@ -17,6 +17,18 @@
static des_key_schedule sequence_seed; static des_key_schedule sequence_seed;
static u_int32_t sequence_index[2]; static u_int32_t sequence_index[2];
/*
* In case the generator does not get inited use this for backup.
*/
static int initialized;
static des_cblock default_seed = {0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef};
static void
do_initialize()
{
des_set_odd_parity(&default_seed);
des_set_random_generator_seed(&default_seed);
}
#define zero_long_long(ll) do { ll[0] = ll[1] = 0; } while (0) #define zero_long_long(ll) do { ll[0] = ll[1] = 0; } while (0)
#define incr_long_long(ll) do { if (++ll[0] == 0) ++ll[1]; } while (0) #define incr_long_long(ll) do { if (++ll[0] == 0) ++ll[1]; } while (0)
@@ -37,6 +49,7 @@ des_set_random_generator_seed(des_cblock *seed)
{ {
des_key_sched(seed, sequence_seed); des_key_sched(seed, sequence_seed);
zero_long_long(sequence_index); zero_long_long(sequence_index);
initialized = 1;
} }
/* /*
@@ -47,6 +60,9 @@ des_set_random_generator_seed(des_cblock *seed)
int int
des_new_random_key(des_cblock *key) des_new_random_key(des_cblock *key)
{ {
if (!initialized)
do_initialize();
try_again: try_again:
des_generate_random_block(key); des_generate_random_block(key);
/* random key must have odd parity and not be weak */ /* random key must have odd parity and not be weak */