diff options
Diffstat (limited to 'loginutils')
| -rw-r--r-- | loginutils/passwd.c | 50 |
1 files changed, 28 insertions, 22 deletions
diff --git a/loginutils/passwd.c b/loginutils/passwd.c index 41033e5..83c3a2d 100644 --- a/loginutils/passwd.c +++ b/loginutils/passwd.c @@ -5,6 +5,7 @@ #include "busybox.h" #include <syslog.h> +#include <sys/times.h> /* times() */ static void nuke_str(char *str) @@ -19,28 +20,35 @@ static int i64c(int i) return '.'; if (i == 1) return '/'; - if (i >= 2 && i < 12) + if (i < 12) return ('0' - 2 + i); - if (i >= 12 && i < 38) + if (i < 38) return ('A' - 12 + i); - if (i >= 38 && i < 63) - return ('a' - 38 + i); - return 'z'; + return ('a' - 38 + i); } -static char *crypt_make_salt(void) +static void crypt_make_salt(char *p, int cnt) { - time_t now; - static unsigned long x; - static char result[3]; - - time(&now); - x += now + getpid() + clock(); - result[0] = i64c(((x >> 18) ^ (x >> 6)) & 077); - result[1] = i64c(((x >> 12) ^ x) & 077); - result[2] = '\0'; - return result; +#if !defined(__GLIBC__) + struct tms t; +#define TIMES times(&t) +#else +/* glibc allows for times(NULL) a-la time() */ +#define TIMES times(NULL) +#endif + unsigned long x = x; /* it's pointless to initialize it anyway :) */ + + x += getpid(); + do { + /* clock() and times() variability is different between systems */ + /* hopefully at least one is good enough */ + x += time(NULL) + clock() + TIMES; + *p++ = i64c(((x >> 18) ^ (x >> 6)) & 0x3f); + *p++ = i64c(((x >> 12) ^ x) & 0x3f); + usleep(100); /* or else time() etc won't change */ + } while (--cnt); + *p = '\0'; } @@ -88,14 +96,12 @@ static char* new_password(const struct passwd *pw, const char *old_crypted, goto err_ret; } - memset(salt, 0, sizeof(salt)); - if (algo == 1) { /* MD5 */ + /*memset(salt, 0, sizeof(salt)); - why?*/ + crypt_make_salt(salt, 1); /* des */ + if (algo) { /* MD5 */ strcpy(salt, "$1$"); - strcat(salt, crypt_make_salt()); - strcat(salt, crypt_make_salt()); - strcat(salt, crypt_make_salt()); + crypt_make_salt(salt + 3, 4); } - strcat(salt, crypt_make_salt()); ret = xstrdup(pw_encrypt(newp, salt)); /* returns ptr to static */ /* whee, success! */ |