diff options
Diffstat (limited to 'misc-utils/mcookie.c')
| -rw-r--r-- | misc-utils/mcookie.c | 91 |
1 files changed, 66 insertions, 25 deletions
diff --git a/misc-utils/mcookie.c b/misc-utils/mcookie.c index 33ae7630..9f13b49d 100644 --- a/misc-utils/mcookie.c +++ b/misc-utils/mcookie.c @@ -1,7 +1,7 @@ /* mcookie.c -- Generates random numbers for xauth * Created: Fri Feb 3 10:42:48 1995 by faith@cs.unc.edu - * Revised: Mon Sep 25 23:44:43 1995 by r.faith@ieee.org - * Public Domain 1995 Rickard E. Faith (faith@cs.unc.edu) + * Revised: Fri Mar 19 07:48:01 1999 by faith@acm.org + * Public Domain 1995, 1999 Rickard E. Faith (faith@acm.org) * This program comes with ABSOLUTELY NO WARRANTY. * * $Id: mcookie.c,v 1.5 1997/07/06 00:13:06 aebr Exp $ @@ -13,6 +13,11 @@ * NOTE: Unless /dev/random is available, this program does not actually * gather 128 bits of random information, so the magic cookie generated * will be considerably easier to guess than one might expect. + * + * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org> + * - added Native Language Support + * 1999-03-21 aeb: Added some fragments of code from Colin Plumb. + * */ #ifdef __linux__ @@ -27,29 +32,48 @@ #include <sys/time.h> #include <unistd.h> #endif +#include "nls.h" -#define MAXBUFFERSIZE 512 +#define BUFFERSIZE 4096 struct rngs { const char *path; - int length; + int minlength, maxlength; } rngs[] = { - { "/dev/random", 16 }, - { "/dev/urandom", 128 }, - { "/proc/stat", MAXBUFFERSIZE }, - { "/proc/loadavg", MAXBUFFERSIZE }, - { "/dev/audio", MAXBUFFERSIZE }, + { "/dev/random", 16, 16 }, /* 16 bytes = 128 bits suffice */ + { "/proc/interrupts", 0, 0 }, + { "/proc/slabinfo", 0, 0 }, + { "/proc/stat", 0, 0 }, + { "/dev/urandom", 32, 64 }, }; #define RNGS (sizeof(rngs)/sizeof(struct rngs)) int Verbose = 0; +/* The basic function to hash a file */ +static off_t +hash_file(struct MD5Context *ctx, int fd) +{ + off_t count = 0; + ssize_t r; + unsigned char buf[BUFFERSIZE]; + + while ((r = read(fd, buf, sizeof(buf))) > 0) { + MD5Update(ctx, buf, r); + count += r; + } + /* Separate files with a null byte */ + buf[0] = 0; + MD5Update(ctx, buf, 1); + return count; +} + int main( int argc, char **argv ) { int i; struct MD5Context ctx; unsigned char digest[16]; - unsigned char buf[MAXBUFFERSIZE]; + unsigned char buf[BUFFERSIZE]; int fd; int c; pid_t pid; @@ -62,6 +86,10 @@ int main( int argc, char **argv ) long int t; #endif + setlocale(LC_ALL, ""); + bindtextdomain(PACKAGE, LOCALEDIR); + textdomain(PACKAGE); + while ((c = getopt( argc, argv, "vf:" )) != EOF) switch (c) { case 'v': ++Verbose; break; @@ -85,39 +113,52 @@ int main( int argc, char **argv ) if (file) { int count = 0; - if (file[0] == '-' && !file[1]) fd = fileno(stdin); - else if ((fd = open( file, O_RDONLY )) <0) { - fprintf( stderr, "Could not open %s\n", file ); - } + if (file[0] == '-' && !file[1]) + fd = fileno(stdin); + else + fd = open( file, O_RDONLY ); + + if (fd < 0) { + fprintf( stderr, _("Could not open %s\n"), file ); + } else { + count = hash_file( &ctx, fd ); + if (Verbose) + fprintf( stderr, _("Got %d bytes from %s\n"), count, file ); - while ((r = read( fd, buf, sizeof( buf ) )) > 0) { - MD5Update( &ctx, buf, r ); - count += r; + if (file[0] != '-' || file[1]) close( fd ); } - if (Verbose) - fprintf( stderr, "Got %d bytes from %s\n", count, file ); - - if (file[0] != '-' || file[1]) close( fd ); } for (i = 0; i < RNGS; i++) { if ((fd = open( rngs[i].path, O_RDONLY|O_NONBLOCK )) >= 0) { - r = read( fd, buf, sizeof( buf ) ); + int count = sizeof(buf); + + if (rngs[i].maxlength && count > rngs[i].maxlength) + count = rngs[i].maxlength; + r = read( fd, buf, count ); if (r > 0) MD5Update( &ctx, buf, r ); else r = 0; close( fd ); if (Verbose) - fprintf( stderr, "Got %d bytes from %s\n", r, rngs[i].path ); - if (r >= rngs[i].length) break; + fprintf( stderr, _("Got %d bytes from %s\n"), r, rngs[i].path ); + if (rngs[i].minlength && r >= rngs[i].minlength) + break; } else if (Verbose) - fprintf( stderr, "Could not open %s\n", rngs[i].path ); + fprintf( stderr, _("Could not open %s\n"), rngs[i].path ); } MD5Final( digest, &ctx ); for (i = 0; i < 16; i++) printf( "%02x", digest[i] ); putchar ( '\n' ); + /* + * The following is important for cases like disk full, so shell scripts + * can bomb out properly rather than think they succeeded. + */ + if (fflush(stdout) < 0 || fclose(stdout) < 0) + return 1; + return 0; } |