From: Vincent Pelletier Date: Sun, 9 Sep 2018 04:09:27 +0000 Subject: scsi: target: iscsi: Use bin2hex instead of a re-implementation Git-commit: 8c39e2699f8acb2e29782a834e56306da24937fe Patch-mainline: v4.19-rc6 References: bsc#1107829 CVE-2018-14633 Signed-off-by: Vincent Pelletier Reviewed-by: Mike Christie Signed-off-by: Martin K. Petersen Acked-by: Lee Duncan --- drivers/target/iscsi/iscsi_target_auth.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) diff --git a/drivers/target/iscsi/iscsi_target_auth.c b/drivers/target/iscsi/iscsi_target_auth.c index 6c3b4c022894..4e680d753941 100644 --- a/drivers/target/iscsi/iscsi_target_auth.c +++ b/drivers/target/iscsi/iscsi_target_auth.c @@ -26,15 +26,6 @@ #include "iscsi_target_nego.h" #include "iscsi_target_auth.h" -static void chap_binaryhex_to_asciihex(char *dst, char *src, int src_len) -{ - int i; - - for (i = 0; i < src_len; i++) { - sprintf(&dst[i*2], "%02x", (int) src[i] & 0xff); - } -} - static int chap_gen_challenge( struct iscsi_conn *conn, int caller, @@ -50,7 +41,7 @@ static int chap_gen_challenge( ret = get_random_bytes_wait(chap->challenge, CHAP_CHALLENGE_LENGTH); if (unlikely(ret)) return ret; - chap_binaryhex_to_asciihex(challenge_asciihex, chap->challenge, + bin2hex(challenge_asciihex, chap->challenge, CHAP_CHALLENGE_LENGTH); /* * Set CHAP_C, and copy the generated challenge into c_str. @@ -289,7 +280,7 @@ static int chap_server_compute_md5( goto out; } - chap_binaryhex_to_asciihex(response, server_digest, MD5_SIGNATURE_SIZE); + bin2hex(response, server_digest, MD5_SIGNATURE_SIZE); pr_debug("[server] MD5 Server Digest: %s\n", response); if (memcmp(server_digest, client_digest, MD5_SIGNATURE_SIZE) != 0) { @@ -411,7 +402,7 @@ static int chap_server_compute_md5( /* * Convert response from binary hex to ascii hext. */ - chap_binaryhex_to_asciihex(response, digest, MD5_SIGNATURE_SIZE); + bin2hex(response, digest, MD5_SIGNATURE_SIZE); *nr_out_len += sprintf(nr_out_ptr + *nr_out_len, "CHAP_R=0x%s", response); *nr_out_len += 1;