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/* Copyright (c) 2003, Roger Dingledine
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file keyval.c
*
* \brief Handle data encoded as a key=value pair.
**/
#include "orconfig.h"
#include "lib/encoding/keyval.h"
#include "lib/log/escape.h"
#include "lib/log/log.h"
#include "lib/log/util_bug.h"
#include <stdlib.h>
#include <string.h>
/** Return true if <b>string</b> is a valid 'key=[value]' string.
* "value" is optional, to indicate the empty string. Log at logging
* <b>severity</b> if something ugly happens. */
int
string_is_key_value(int severity, const char *string)
{
/* position of equal sign in string */
const char *equal_sign_pos = NULL;
tor_assert(string);
if (strlen(string) < 2) { /* "x=" is shortest args string */
tor_log(severity, LD_GENERAL, "'%s' is too short to be a k=v value.",
escaped(string));
return 0;
}
equal_sign_pos = strchr(string, '=');
if (!equal_sign_pos) {
tor_log(severity, LD_GENERAL, "'%s' is not a k=v value.", escaped(string));
return 0;
}
/* validate that the '=' is not in the beginning of the string. */
if (equal_sign_pos == string) {
tor_log(severity, LD_GENERAL, "'%s' is not a valid k=v value.",
escaped(string));
return 0;
}
return 1;
}
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