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| author | Guillaume Nault <g.nault@alphalink.fr> | 2013-04-09 21:43:04 +0200 |
|---|---|---|
| committer | Dmitry Kozlov <xeb@mail.ru> | 2013-04-17 09:06:35 +0400 |
| commit | b041db6c60fb80846ad6b6770adc3971e41b2194 (patch) | |
| tree | d1d2b3b8b5dbae57360357bf8b0ad4064abc01a3 /accel-pppd/ctrl/l2tp/l2tp.c | |
| parent | 76f30e4e2d664d3c10f988b8d9660b478718c777 (diff) | |
| download | accel-ppp-b041db6c60fb80846ad6b6770adc3971e41b2194.tar.gz accel-ppp-b041db6c60fb80846ad6b6770adc3971e41b2194.zip | |
utils: Add random buffer generation function
Define and export the u_randbuf() function that fills a buffer with
random data.
Convert L2TP's challenge generation code for using it.
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Diffstat (limited to 'accel-pppd/ctrl/l2tp/l2tp.c')
| -rw-r--r-- | accel-pppd/ctrl/l2tp/l2tp.c | 27 |
1 files changed, 9 insertions, 18 deletions
diff --git a/accel-pppd/ctrl/l2tp/l2tp.c b/accel-pppd/ctrl/l2tp/l2tp.c index 267a47f8..c6ba82ff 100644 --- a/accel-pppd/ctrl/l2tp/l2tp.c +++ b/accel-pppd/ctrl/l2tp/l2tp.c @@ -223,8 +223,7 @@ static int l2tp_tunnel_genchall(uint16_t chall_len, struct l2tp_packet_t *pack) { void *ptr = NULL; - size_t urandlen; - ssize_t rdlen; + int err; if (chall_len == 0 || conf_secret == NULL || conf_secret_len == 0) { @@ -248,26 +247,18 @@ static int l2tp_tunnel_genchall(uint16_t chall_len, conn->challenge_len = chall_len; } - for (urandlen = 0; urandlen < chall_len; urandlen += rdlen) { - rdlen = read(urandom_fd, conn->challenge + urandlen, - chall_len - urandlen); - if (rdlen < 0) { - if (errno == EINTR) - rdlen = 0; - else { - log_tunnel(log_error, conn, - "impossible to generate Challenge:" - " reading from urandom failed: %s\n", - strerror(errno)); - goto err; - } - } else if (rdlen == 0) { + if (u_randbuf(conn->challenge, chall_len, &err) < 0) { + if (err) + log_tunnel(log_error, conn, + "impossible to generate Challenge:" + " reading from urandom failed: %s\n", + strerror(err)); + else log_tunnel(log_error, conn, "impossible to generate Challenge:" " end of file reached while reading" " from urandom\n"); - goto err; - } + goto err; } if (l2tp_packet_add_octets(pack, Challenge, conn->challenge, |