The result from get_random_bytes should already be random, so further
manipulation and mixing should not be needed.
Signed-off-by: Andy Grover <agrover@xxxxxxxxxx>
---
drivers/target/iscsi/iscsi_target_auth.c | 28 +---------------------------
1 files changed, 1 insertions(+), 27 deletions(-)
diff --git a/drivers/target/iscsi/iscsi_target_auth.c b/drivers/target/iscsi/iscsi_target_auth.c
index db0cf7c..b104c49 100644
--- a/drivers/target/iscsi/iscsi_target_auth.c
+++ b/drivers/target/iscsi/iscsi_target_auth.c
@@ -49,32 +49,6 @@ static void chap_binaryhex_to_asciihex(char *dst, char *src, int src_len)
}
}
-static void chap_set_random(char *data, int length)
-{
- long r;
- unsigned n;
-
- while (length > 0) {
- get_random_bytes(&r, sizeof(long));
- r = r ^ (r >> 8);
- r = r ^ (r >> 4);
- n = r & 0x7;
-
- get_random_bytes(&r, sizeof(long));
- r = r ^ (r >> 8);
- r = r ^ (r >> 5);
- n = (n << 3) | (r & 0x7);
-
- get_random_bytes(&r, sizeof(long));
- r = r ^ (r >> 8);
- r = r ^ (r >> 5);
- n = (n << 2) | (r & 0x3);
-
- *data++ = n;
- length--;
- }
-}
-
static void chap_gen_challenge(
struct iscsi_conn *conn,
int caller,
@@ -86,7 +60,7 @@ static void chap_gen_challenge(
memset(challenge_asciihex, 0, CHAP_CHALLENGE_LENGTH * 2 + 1);
- chap_set_random(chap->challenge, CHAP_CHALLENGE_LENGTH);
+ get_random_bytes(chap->challenge, CHAP_CHALLENGE_LENGTH);
chap_binaryhex_to_asciihex(challenge_asciihex, chap->challenge,
CHAP_CHALLENGE_LENGTH);
/*
--
1.7.1
--
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