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Annotation of lucent/sys/src/9/boot/key.c, revision 1.1.1.1

1.1       root        1: #include <u.h>
                      2: #include <libc.h>
                      3: #include <auth.h>
                      4: #include <../boot/boot.h>
                      5: 
                      6: static void
                      7: check(void *x, int len, uchar sum, char *msg)
                      8: {
                      9:        if(nvcsum(x, len) == sum)
                     10:                return;
                     11:        memset(x, 0, len);
                     12:        kflag = 1;
                     13:        warning(msg);
                     14: }
                     15: 
                     16: /*
                     17:  *  get info out of nvram.  since there isn't room in the PC's nvram use
                     18:  *  a disk partition there.
                     19:  */
                     20: void
                     21: key(int islocal, Method *mp)
                     22: {
                     23:        int fd, safeoff;
                     24:        Nvrsafe safe;
                     25:        char password[20];
                     26: 
                     27:        USED(islocal);
                     28:        USED(mp);
                     29: 
                     30:        if(strcmp(cputype, "sparc") == 0){
                     31:                fd = open("#r/nvram", ORDWR);
                     32:                safeoff = 1024+850;
                     33:        } else if(strcmp(cputype, "386") == 0){
                     34:                fd = open("#H/hd0nvram", ORDWR);
                     35:                if(fd < 0)
                     36:                        fd = open("#w/sd0nvram", ORDWR);
                     37:                safeoff = 0x0;
                     38:        } else {
                     39:                fd = open("#r/nvram", ORDWR);
                     40:                safeoff = 1024+900;
                     41:        }
                     42: 
                     43:        if(fd < 0
                     44:        || seek(fd, safeoff, 0) < 0
                     45:        || read(fd, &safe, sizeof safe) != sizeof safe){
                     46:                memset(&safe, 0, sizeof(safe));
                     47:                warning("can't read nvram");
                     48:        }
                     49:        check(safe.machkey, DESKEYLEN, safe.machsum, "bad nvram key");
                     50:        check(safe.authid, NAMELEN, safe.authidsum, "bad authentication id");
                     51:        check(safe.authdom, DOMLEN, safe.authdomsum, "bad authentication domain");
                     52:        if(kflag){
                     53:                do
                     54:                        getpasswd(password, sizeof password);
                     55:                while(!passtokey(safe.machkey, password));
                     56:                outin(0, "authid", safe.authid, sizeof(safe.authid));
                     57:                outin(0, "authdom", safe.authdom, sizeof(safe.authdom));
                     58:                safe.machsum = nvcsum(safe.machkey, DESKEYLEN);
                     59:                safe.authidsum = nvcsum(safe.authid, sizeof(safe.authid));
                     60:                safe.authdomsum = nvcsum(safe.authdom, sizeof(safe.authdom));
                     61:                if(seek(fd, safeoff, 0) < 0
                     62:                || write(fd, &safe, sizeof safe) != sizeof safe)
                     63:                        warning("can't write key to nvram");
                     64:        }
                     65:        close(fd);
                     66: 
                     67:        /* set host's key */
                     68:        if(writefile("#c/key", safe.machkey, DESKEYLEN) < 0)
                     69:                fatal("#c/key");
                     70: 
                     71:        /* set host's owner (and uid of current process) */
                     72:        if(writefile("#c/hostowner", safe.authid, strlen(safe.authid)) < 0)
                     73:                fatal("#c/hostowner");
                     74: 
                     75:        /* set host's domain */
                     76:        if(writefile("#c/hostdomain", safe.authdom, strlen(safe.authdom)) < 0)
                     77:                fatal("#c/hostdomain");
                     78: }

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