tyler.durden
/
openssh-portable
mirror of https://github.com/PowerShell/openssh-portable.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

upstream: move authorized_keys option parsing helpsers to misc.c 

and make them public; ok markus@

OpenBSD-Commit-ID: c18bcb2a687227b3478377c981c2d56af2638ea2
This commit is contained in:
djm@openbsd.org 2019-09-03 08:32:11 +00:00 committed by Damien Miller
parent f8df0413f0
commit 5485f8d50a
3 changed files with 80 additions and 72 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
auth-options.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth-options.c,v 1.86 2019/07/09 04:15:00 djm Exp $ */
/* $OpenBSD: auth-options.c,v 1.87 2019/09/03 08:32:11 djm Exp $ */
/*
* Copyright (c) 2018 Damien Miller <djm@mindrot.org>
*
@ -40,75 +40,6 @@
#include "ssh2.h"
#include "auth-options.h"
/*
* Match flag 'opt' in *optsp, and if allow_negate is set then also match
* 'no-opt'. Returns -1 if option not matched, 1 if option matches or 0
* if negated option matches.
* If the option or negated option matches, then *optsp is updated to
* point to the first character after the option.
*/
static int
opt_flag(const char *opt, int allow_negate, const char **optsp)
{
size_t opt_len = strlen(opt);
const char *opts = *optsp;
int negate = 0;
if (allow_negate && strncasecmp(opts, "no-", 3) == 0) {
opts += 3;
negate = 1;
}
if (strncasecmp(opts, opt, opt_len) == 0) {
*optsp = opts + opt_len;
return negate ? 0 : 1;
}
return -1;
}
static char *
opt_dequote(const char **sp, const char **errstrp)
{
const char *s = *sp;
char *ret;
size_t i;
*errstrp = NULL;
if (*s != '"') {
*errstrp = "missing start quote";
return NULL;
}
s++;
if ((ret = malloc(strlen((s)) + 1)) == NULL) {
*errstrp = "memory allocation failed";
return NULL;
}
for (i = 0; *s != '\0' && *s != '"';) {
if (s[0] == '\\' && s[1] == '"')
s++;
ret[i++] = *s++;
}
if (*s == '\0') {
*errstrp = "missing end quote";
free(ret);
return NULL;
}
ret[i] = '\0';
s++;
*sp = s;
return ret;
}
static int
opt_match(const char **opts, const char *term)
{
if (strncasecmp((*opts), term, strlen(term)) == 0 &&
(*opts)[strlen(term)] == '=') {
*opts += strlen(term) + 1;
return 1;
}
return 0;
}
static int
dup_strings(char ***dstp, size_t *ndstp, char **src, size_t nsrc)
{

74
misc.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: misc.c,v 1.141 2019/09/03 08:29:58 djm Exp $ */
/* $OpenBSD: misc.c,v 1.142 2019/09/03 08:32:11 djm Exp $ */
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
* Copyright (c) 2005,2006 Damien Miller. All rights reserved.
@ -2137,3 +2137,75 @@ skip_space(char **cpp)
;
*cpp = cp;
}
/* authorized_key-style options parsing helpers */
/*
* Match flag 'opt' in *optsp, and if allow_negate is set then also match
* 'no-opt'. Returns -1 if option not matched, 1 if option matches or 0
* if negated option matches.
* If the option or negated option matches, then *optsp is updated to
* point to the first character after the option.
*/
int
opt_flag(const char *opt, int allow_negate, const char **optsp)
{
size_t opt_len = strlen(opt);
const char *opts = *optsp;
int negate = 0;
if (allow_negate && strncasecmp(opts, "no-", 3) == 0) {
opts += 3;
negate = 1;
}
if (strncasecmp(opts, opt, opt_len) == 0) {
*optsp = opts + opt_len;
return negate ? 0 : 1;
}
return -1;
}
char *
opt_dequote(const char **sp, const char **errstrp)
{
const char *s = *sp;
char *ret;
size_t i;
*errstrp = NULL;
if (*s != '"') {
*errstrp = "missing start quote";
return NULL;
}
s++;
if ((ret = malloc(strlen((s)) + 1)) == NULL) {
*errstrp = "memory allocation failed";
return NULL;
}
for (i = 0; *s != '\0' && *s != '"';) {
if (s[0] == '\\' && s[1] == '"')
s++;
ret[i++] = *s++;
}
if (*s == '\0') {
*errstrp = "missing end quote";
free(ret);
return NULL;
}
ret[i] = '\0';
s++;
*sp = s;
return ret;
}
int
opt_match(const char **opts, const char *term)
{
if (strncasecmp((*opts), term, strlen(term)) == 0 &&
(*opts)[strlen(term)] == '=') {
*opts += strlen(term) + 1;
return 1;
}
return 0;
}

7
misc.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: misc.h,v 1.80 2019/09/03 08:29:58 djm Exp $ */
/* $OpenBSD: misc.h,v 1.81 2019/09/03 08:32:11 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -166,6 +166,11 @@ int safe_path(const char *, struct stat *, const char *, uid_t,
int safe_path_fd(int, const char *, struct passwd *,
char *err, size_t errlen);
/* authorized_key-style options parsing helpers */
int opt_flag(const char *opt, int allow_negate, const char **optsp);
char *opt_dequote(const char **sp, const char **errstrp);
int opt_match(const char **opts, const char *term);
/* readpass.c */
#define RP_ECHO 0x0001