[PATCH/RFC 5/7] imap-send: provide fall-back random-source
From: Erik Faye-Lund <hidden>
Date: 2016-06-15 22:47:28
Subsystem:
the rest · Maintainer:
Linus Torvalds
Since some systems (at least Windows) does not have /dev/random nor friends, we need another random-source. This patch uses the C-runtime's rand()-function as a poor-mans random-source. Signed-off-by: Erik Faye-Lund <redacted> --- imap-send.c | 17 ++++++++++------- 1 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/imap-send.c b/imap-send.c
index 8338717..dda7b7f 100644
--- a/imap-send.c
+++ b/imap-send.c@@ -511,14 +511,17 @@ static void arc4_init(void) unsigned char j, si, dat[128]; if ((fd = open("/dev/urandom", O_RDONLY)) < 0 && (fd = open("/dev/random", O_RDONLY)) < 0) { - fprintf(stderr, "Fatal: no random number source available.\n"); - exit(3); - } - if (read_in_full(fd, dat, 128) != 128) { - fprintf(stderr, "Fatal: cannot read random number source.\n"); - exit(3); + /* poor-mans random-source */ + srand(clock()); + for (i = 0; i < 128; ++i) + dat[i] = rand() & 0xFF; + } else { + if (read_in_full(fd, dat, 128) != 128) { + fprintf(stderr, "Fatal: cannot read random number source.\n"); + exit(3); + } + close(fd); } - close(fd); for (i = 0; i < 256; i++) rs.s[i] = i;
--
1.6.5.rc2.7.g4f8d3