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Remove seed passing over reexec. 

This was added for the benefit of platforms using ssh-rand-helper to
prevent a delay on each connection as sshd reseeded itself.

ssh-random-helper is long gone, and since the re-exec happens before the
chroot the re-execed sshd can reseed itself normally. ok djm@
This commit is contained in:
Darren Tucker 2022-11-10 12:44:51 +11:00
parent ca98d3f8c6
commit 5372db7e79
No known key found for this signature in database
2 changed files with 0 additions and 42 deletions
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34
entropy.c
View File

@ -57,40 +57,6 @@
* /dev/random), then collect RANDOM_SEED_SIZE bytes of randomness from
* PRNGd.
*/
#ifndef OPENSSL_PRNG_ONLY
void
rexec_send_rng_seed(struct sshbuf *m)
{
u_char buf[RANDOM_SEED_SIZE];
size_t len = sizeof(buf);
int r;
if (RAND_bytes(buf, sizeof(buf)) <= 0) {
error("Couldn't obtain random bytes (error %ld)",
ERR_get_error());
len = 0;
}
if ((r = sshbuf_put_string(m, buf, len)) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
explicit_bzero(buf, sizeof(buf));
}
void
rexec_recv_rng_seed(struct sshbuf *m)
{
const u_char *buf = NULL;
size_t len = 0;
int r;
if ((r = sshbuf_get_string_direct(m, &buf, &len)) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
debug3("rexec_recv_rng_seed: seeding rng with %lu bytes",
(unsigned long)len);
RAND_add(buf, len, len);
}
#endif /* OPENSSL_PRNG_ONLY */
void
seed_rng(void)

8
sshd.c
View File

@ -937,14 +937,10 @@ send_rexec_state(int fd, struct sshbuf *conf)
* string filename
* string contents
* }
* string rng_seed (if required)
*/
if ((r = sshbuf_put_stringb(m, conf)) != 0 ||
(r = sshbuf_put_stringb(m, inc)) != 0)
fatal_fr(r, "compose config");
#if defined(WITH_OPENSSL) && !defined(OPENSSL_PRNG_ONLY)
rexec_send_rng_seed(m);
#endif
if (ssh_msg_send(fd, 0, m) == -1)
error_f("ssh_msg_send failed");
@ -977,10 +973,6 @@ recv_rexec_state(int fd, struct sshbuf *conf)
(r = sshbuf_get_stringb(m, inc)) != 0)
fatal_fr(r, "parse config");
#if defined(WITH_OPENSSL) && !defined(OPENSSL_PRNG_ONLY)
rexec_recv_rng_seed(m);
#endif
if (conf != NULL && (r = sshbuf_put(conf, cp, len)))
fatal_fr(r, "sshbuf_put");