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Try EGD/PRNGD if random device fails.

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When built --without-openssl, try EGD/PRGGD (if configured) as a last
resort before failing.
This commit is contained in:
Darren Tucker 2021-06-18 18:34:08 +10:00
parent e43a898043
commit e409d79667
1 changed files with 9 additions and 3 deletions
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12
openbsd-compat/arc4random.c
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@ -88,7 +88,7 @@ _rs_init(u_char *buf, size_t n)
static void static void
getrnd(u_char *s, size_t len) getrnd(u_char *s, size_t len)
{ {
int fd; int fd, save_errno;
ssize_t r; ssize_t r;
size_t o = 0; size_t o = 0;
@ -97,8 +97,14 @@ getrnd(u_char *s, size_t len)
return; return;
#endif /* HAVE_GETRANDOM */ #endif /* HAVE_GETRANDOM */
if ((fd = open(SSH_RANDOM_DEV, O_RDONLY)) == -1) if ((fd = open(SSH_RANDOM_DEV, O_RDONLY)) == -1) {
fatal("Couldn't open %s: %s", SSH_RANDOM_DEV, strerror(errno)); save_errno = errno;
/* Try egd/prngd before giving up. */
if (seed_from_prngd(s, len) == 0)
return;
fatal("Couldn't open %s: %s", SSH_RANDOM_DEV,
strerror(save_errno));
}
while (o < len) { while (o < len) {
r = read(fd, s + o, len - o); r = read(fd, s + o, len - o);
if (r < 0) { if (r < 0) {