1992/0317/boot/userpasswd.c (diff list | history)

boot/userpasswd.c on 1992/0317
1992/0317		#include <u.h> #include <libc.h> #include <../boot/boot.h> char password[NAMELEN]; static int passtokey(char *key, char *p, int n) { uchar t[10]; int c; memset(t, ' ', sizeof t); if(n < 5) return 0; if(n > 10) n = 10; strncpy((char*)t, p, n); if(n >= 9){ c = p[8] & 0xf; if(n == 10) c += p[9] << 4; for(n = 0; n < 8; n++) if(c & (1 << n)) t[n] -= ' '; } for(n = 0; n < 7; n++) key[n] = (t[n] >> n) + (t[n+1] << (8 - (n+1))); return 1; } /* * get/set user name and password. verify password with auth server. */ void userpasswd(Method *mp) { char key[7]; char buf[8 + NAMELEN]; int fd, crfd; if(*username == 0 || strcmp(username, "none") == 0){ strcpy(username, "none"); outin("user", username, sizeof(username)); } crfd = fd = -1; while(strcmp(username, "none") != 0 && strcmp(mp->name, "local") != 0){ getpasswd(password, sizeof password); if(!passtokey(key, password, strlen(password))){ print("bad password; try again\n"); continue; } fd = open("#c/key", OWRITE); if(fd < 0) fatal("can't open #c/key; please reboot"); if(write(fd, key, 7) != 7) fatal("can't write #c/key; please reboot"); close(fd); crfd = open("#c/crypt", ORDWR); if(crfd < 0) fatal("can't open crypt file"); write(crfd, "E", 1); fd = (*mp->auth)(); if(fd < 0){ warning("password not checked!"); break; } strncpy(buf+8, username, NAMELEN); if(read(fd, buf, 8) != 8 || write(crfd, buf, 8) != 8 || read(crfd, buf, 8) != 8 || write(fd, buf, 8 + NAMELEN) != 8 + NAMELEN){ warning("password not checked!"); break; } if(read(fd, buf, 2) == 2 && buf[0]=='O' && buf[1]=='K') break; close(fd); outin("user", username, sizeof(username)); } close(fd); close(crfd); /* set user now that we're sure */ fd = open("#c/user", OWRITE|OTRUNC); if(fd >= 0){ if(write(fd, username, strlen(username)) < 0) warning("write user name"); close(fd); }else warning("open #c/user"); }