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iscsi-target; Enforce 1024 byte maximum for CHAP_C key value

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This patch adds a check in chap_server_compute_md5() to enforce a
1024 byte maximum for the CHAP_C key value following the requirement
in RFC-3720 Section 11.1.4:

   "..., C and R are large-binary-values and their binary length (not
   the length of the character string that represents them in encoded
   form) MUST not exceed 1024 bytes."

Reported-by: rahul.rane <rahul.rane@calsoftinc.com>
Tested-by: rahul.rane <rahul.rane@calsoftinc.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2014-06-13 04:28:31 +00:00
parent b06eef6eab
commit e4fae2318b
1 changed files with 4 additions and 0 deletions
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4
drivers/target/iscsi/iscsi_target_auth.c
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@ -355,6 +355,10 @@ static int chap_server_compute_md5(
pr_err("Unable to convert incoming challenge\n");
goto out;
}
if (challenge_len > 1024) {
pr_err("CHAP_C exceeds maximum binary size of 1024 bytes\n");
goto out;
}
/*
* During mutual authentication, the CHAP_C generated by the
* initiator must not match the original CHAP_C generated by