#include <u.h>#include <libc.h>#include <bio.h>#include <libsec.h>#include <authsrv.h>#include "authcmdlib.h" static uchar zeros[16]; intreadfile(char *file, char *buf, int n){	int fd; 	fd = open(file, OREAD);	if(fd < 0){		werrstr("%s: %r", file);		return -1;	}	n = read(fd, buf, n);	close(fd);	return n;} intwritefile(char *file, char *buf, int n){	int fd; 	fd = open(file, OWRITE);	if(fd < 0)		return -1;	n = write(fd, buf, n);	close(fd);	return n;} char*finddeskey(char *db, char *user, char *key){	char filename[Maxpath]; 	snprint(filename, sizeof filename, "%s/%s/key", db, user);	if(readfile(filename, key, DESKEYLEN) != DESKEYLEN)		return nil;	return key;} uchar*findaeskey(char *db, char *user, uchar *key){	char filename[Maxpath]; 	snprint(filename, sizeof filename, "%s/%s/aeskey", db, user);	if(readfile(filename, (char*)key, AESKEYLEN) != AESKEYLEN)		return nil;	return key;} intfindkey(char *db, char *user, Authkey *key){	int ret; 	memset(key, 0, sizeof(Authkey));	ret = findaeskey(db, user, key->aes) != nil;	if(ret && tsmemcmp(key->aes, zeros, AESKEYLEN) != 0){		char filename[Maxpath]; 		snprint(filename, sizeof filename, "%s/%s/pakhash", db, user);		if(readfile(filename, (char*)key->pakhash, PAKHASHLEN) != PAKHASHLEN)			authpak_hash(key, user);	}	ret |= finddeskey(db, user, key->des) != nil;	return ret;} char*findsecret(char *db, char *user, char *secret){	int n;	char filename[Maxpath]; 	snprint(filename, sizeof filename, "%s/%s/secret", db, user);	if((n = readfile(filename, secret, SECRETLEN-1)) <= 0)		return nil;	secret[n]=0;	return secret;} char*setdeskey(char *db, char *user, char *key){	char filename[Maxpath]; 	snprint(filename, sizeof filename, "%s/%s/key", db, user);	if(writefile(filename, key, DESKEYLEN) != DESKEYLEN)		return nil;	return key;} uchar*setaeskey(char *db, char *user, uchar *key){	char filename[Maxpath]; 	snprint(filename, sizeof filename, "%s/%s/aeskey", db, user);	if(writefile(filename, (char*)key, AESKEYLEN) != AESKEYLEN)		return nil;	return key;} intsetkey(char *db, char *user, Authkey *key){	int ret; 	ret = setdeskey(db, user, key->des) != nil;	if(tsmemcmp(key->aes, zeros, AESKEYLEN) != 0)		ret |= setaeskey(db, user, key->aes) != nil;	return ret;} char*setsecret(char *db, char *user, char *secret){	char filename[Maxpath]; 	snprint(filename, sizeof filename, "%s/%s/secret", db, user);	if(writefile(filename, secret, strlen(secret)) != strlen(secret))		return nil;	return secret;}