cryptpw: new applet (a bit less than 3k added)

(by Thomas Lundquist <lists@zelow.no>)

3 files changed, 7 insertions, 50 deletions

diff --git a/loginutils/Config.in b/loginutils/Config.in
index e8ab9ec3c..919091ec6 100644
--- a/loginutils/Config.in
+++ b/loginutils/Config.in
@@ -166,6 +166,12 @@ config FEATURE_PASSWD_WEAK_CHECK
 	help
 	  With this option passwd will refuse new passwords which are "weak".
 
+config CRYPTPW
+	bool "cryptpw"
+	default n
+	help
+	  Applet for crypting a string.
+
 config SU
 	bool "su"
 	default n
diff --git a/loginutils/Kbuild b/loginutils/Kbuild
index 6c9d193e1..1b1165a6e 100644
--- a/loginutils/Kbuild
+++ b/loginutils/Kbuild
@@ -7,6 +7,7 @@
 lib-y:=
 lib-$(CONFIG_ADDGROUP)	+= addgroup.o
 lib-$(CONFIG_ADDUSER)	+= adduser.o
+lib-$(CONFIG_CRYPTPW)	+= cryptpw.o
 lib-$(CONFIG_GETTY)	+= getty.o
 lib-$(CONFIG_LOGIN)	+= login.o
 lib-$(CONFIG_PASSWD)	+= passwd.o
diff --git a/loginutils/passwd.c b/loginutils/passwd.c
index b937ce45e..a323c0a40 100644
--- a/loginutils/passwd.c
+++ b/loginutils/passwd.c
@@ -12,44 +12,6 @@ static void nuke_str(char *str)
 	if (str) memset(str, 0, strlen(str));
 }
 
-
-static int i64c(int i)
-{
-	i &= 0x3f;
-	if (i == 0)
-		return '.';
-	if (i == 1)
-		return '/';
-	if (i < 12)
-		return ('0' - 2 + i);
-	if (i < 38)
-		return ('A' - 12 + i);
-	return ('a' - 38 + i);
-}
-
-
-static void crypt_make_salt(char *p, int cnt)
-{
-	unsigned x = x; /* it's pointless to initialize it anyway :) */
-
-	x += getpid() + time(NULL) + clock();
-	do {
-		/* x = (x*1664525 + 1013904223) % 2^32 generator is lame
-		 * (low-order bit is not "random", etc...),
-		 * but for our purposes it is good enough */
-		x = x*1664525 + 1013904223;
-		/* BTW, Park and Miller's "minimal standard generator" is
-		 * x = x*16807 % ((2^31)-1)
-		 * It has no problem with visibly alternating lowest bit
-		 * but is also weak in cryptographic sense + needs div,
-		 * which needs more code (and slower) on many CPUs */
-		*p++ = i64c(x >> 16);
-		*p++ = i64c(x >> 22);
-	} while (--cnt);
-	*p = '\0';
-}
-
-
 static char* new_password(const struct passwd *pw, uid_t myuid, int algo)
 {
 	char salt[sizeof("$N$XXXXXXXX")]; /* "$N$XXXXXXXX" or "XX" */
@@ -109,18 +71,6 @@ static char* new_password(const struct passwd *pw, uid_t myuid, int algo)
 }
 
 
-#if 0
-static int get_algo(char *a)
-{
-	/* standard: MD5 */
-	int x = 1;
-	if (strcasecmp(a, "des") == 0)
-		x = 0;
-	return x;
-}
-#endif
-
-
 static int update_passwd(const char *filename, const char *username,
 			const char *new_pw)
 {