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Make the lines of md5chap understandable.

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This commit is contained in:
yasuoka 2024-07-14 10:52:50 +00:00
parent 8d77fc15c9
commit 1fb7daa0c2
1 changed files with 8 additions and 10 deletions
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18
usr.sbin/npppd/npppd/chap.c
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@ -1,4 +1,4 @@
/* $OpenBSD: chap.c,v 1.19 2024/07/01 07:09:07 yasuoka Exp $ */
/* $OpenBSD: chap.c,v 1.20 2024/07/14 10:52:50 yasuoka Exp $ */
/*-
* Copyright (c) 2009 Internet Initiative Japan Inc.
@ -36,7 +36,7 @@
* </ul></p>
*/
/* RFC 1994, 2433 */
/* $Id: chap.c,v 1.19 2024/07/01 07:09:07 yasuoka Exp $ */
/* $Id: chap.c,v 1.20 2024/07/14 10:52:50 yasuoka Exp $ */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
@ -537,14 +537,12 @@ md5chap_authenticate(chap *_this, int id, char *username, u_char *challenge,
MD5_CTX md5ctx;
int rval, passlen;
u_char digest[16];
char *password, buf[MAX_PASSWORD_LENGTH + 1];
buf[0] = id;
passlen = sizeof(buf) - 1;
password = &buf[1];
char idpass[1 + MAX_PASSWORD_LENGTH + 1];
idpass[0] = id;
passlen = MAX_PASSWORD_LENGTH;
rval = npppd_get_user_password(_this->ppp->pppd, _this->ppp, username,
password, &passlen);
idpass + 1, &passlen);
if (rval != 0) {
switch (rval) {
@ -559,9 +557,9 @@ md5chap_authenticate(chap *_this, int id, char *username, u_char *challenge,
}
goto auth_failed;
}
passlen = strlen(password);
passlen = strlen(idpass + 1);
MD5Init(&md5ctx);
MD5Update(&md5ctx, buf, passlen + 1);
MD5Update(&md5ctx, idpass, 1 + passlen);
MD5Update(&md5ctx, challenge, lchallenge);
MD5Final(digest, &md5ctx);