ref: 57d690c482c7e5f57608befe7cb04797b1bff153
dir: /sys/src/cmd/auth/lib/readwrite.c/
#include <u.h> #include <libc.h> #include <bio.h> #include <libsec.h> #include <authsrv.h> #include "authcmdlib.h" static uchar zeros[16]; int readfile(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; } int writefile(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; } int findkey(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; } int setkey(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; }