[PATCH 4.18 57/88] scsi: target: iscsi: Use bin2hex instead of a re-implementation

[Greg Kroah-Hartman]

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vincent Pelletier <plr.vinc...@gmail.com>

commit 8c39e2699f8acb2e29782a834e56306da24937fe upstream.

Signed-off-by: Vincent Pelletier <plr.vinc...@gmail.com>
Reviewed-by: Mike Christie <mchri...@redhat.com>
Signed-off-by: Martin K. Petersen <martin.peter...@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/target/iscsi/iscsi_target_auth.c |   15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

--- 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;