Add working and easy crypt(3)-switching. Yes, we need a whole new API

for crypt(3) by now.  In any case:

Add crypt_set_format(3) + documentation to -lcrypt.
Add login_setcryptfmt(3) + documentation to -lutil.
Support for switching crypt formats in passwd(8).
Support for switching crypt formats in pw(8).

The simple synopsis is:
edit login.conf; add a passwd_format field set to "des" or "md5"; go nuts :)

Reviewed by:	peter

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/libutil/login_cap.c b/lib/libutil/login_cap.c
index b7528b9..7410380 100644
--- a/lib/libutil/login_cap.c
+++ b/lib/libutil/login_cap.c
@@ -798,3 +798,16 @@ login_getstyle(login_cap_t *lc, char *style, const char *auth)
 
     return lc->lc_style;
 }
+
+const char *
+login_setcryptfmt(login_cap_t *lc, const char *def, const char *error)
+{
+	const char *cipher;
+
+	cipher = login_getcapstr(lc, "passwd_format", def, NULL);
+	if (cipher == NULL)
+		return (error);
+	if (!crypt_set_format(cipher))
+		return (error);
+	return (cipher);
+}