/usr/include/passwdqc.h is in libpasswdqc-dev 1.3.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | /*
* Copyright (c) 2000-2002 by Solar Designer
* Copyright (c) 2008,2009 by Dmitry V. Levin
* See LICENSE
*/
#ifndef PASSWDQC_H__
#define PASSWDQC_H__
#include <pwd.h>
typedef struct {
int min[5], max;
int passphrase_words;
int match_length;
int similar_deny;
int random_bits;
} passwdqc_params_qc_t;
typedef struct {
int flags;
int retry;
} passwdqc_params_pam_t;
typedef struct {
passwdqc_params_qc_t qc;
passwdqc_params_pam_t pam;
} passwdqc_params_t;
extern const char *passwdqc_check(const passwdqc_params_qc_t *params,
const char *newpass, const char *oldpass, const struct passwd *pw);
extern char *passwdqc_random(const passwdqc_params_qc_t *params);
extern int passwdqc_params_parse(passwdqc_params_t *params,
char **reason, int argc, const char *const *argv);
extern int passwdqc_params_load(passwdqc_params_t *params,
char **reason, const char *pathname);
extern void passwdqc_params_reset(passwdqc_params_t *params);
#define F_ENFORCE_MASK 0x00000003
#define F_ENFORCE_USERS 0x00000001
#define F_ENFORCE_ROOT 0x00000002
#define F_ENFORCE_EVERYONE F_ENFORCE_MASK
#define F_NON_UNIX 0x00000004
#define F_ASK_OLDAUTHTOK_MASK 0x00000030
#define F_ASK_OLDAUTHTOK_PRELIM 0x00000010
#define F_ASK_OLDAUTHTOK_UPDATE 0x00000020
#define F_CHECK_OLDAUTHTOK 0x00000040
#define F_USE_FIRST_PASS 0x00000100
#define F_USE_AUTHTOK 0x00000200
#define PASSWDQC_VERSION "1.3.0"
#endif /* PASSWDQC_H__ */
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