diff options
Diffstat (limited to 'lib/libcrypt/crypt.3')
| -rw-r--r-- | lib/libcrypt/crypt.3 | 51 |
1 files changed, 43 insertions, 8 deletions
diff --git a/lib/libcrypt/crypt.3 b/lib/libcrypt/crypt.3 index e9f98c1..81f6261 100644 --- a/lib/libcrypt/crypt.3 +++ b/lib/libcrypt/crypt.3 @@ -43,6 +43,10 @@ .Fd #include <unistd.h> .Ft char * .Fn crypt "const char *key" "const char *salt" +.Ft const char * +.Fn crypt_get_format "void" +.Ft int +.Fn crypt_set_format "const char *string" .Sh DESCRIPTION The .Fn crypt @@ -59,10 +63,12 @@ Currently these include the .Tn Data Encryption Standard (DES) , and .Tn MD5 . -The algorithm used will depend upon the format of the Salt--following -the Modular Crypt Format (MCF)--and if +The algorithm used will depend upon the format of the Salt (following +the Modular Crypt Format (MCF)), if .Tn DES -is installed or not. +is installed or not, and whether +.Fn crypt_set_format +has been called to change the default. .Pp The first argument to .Nm @@ -177,10 +183,15 @@ Other crypt formats may be easilly added. An example salt would be: .Ss "Traditional" crypt: .Pp The algorithm used will depend upon whether +.Fn crypt_set_format +has been called and whether .Tn DES -is installed or not. If it is, +is installed or not. If .Tn DES -will be used. Otherwise, the best algorithm is used, which is currently +is installed and +.Fn crypt_set_format +has not set the format to something else, it will be used. +Otherwise, the best algorithm is used, which is currently .\" .\" NOTICE: Also make sure to update this .\" @@ -188,6 +199,23 @@ MD5. .Pp How the salt is used will depend upon the algorithm for the hash. For best results, specify at least two characters of salt. +.Pp +The +.Fn crypt_get_format +function returns a constant string that represents the name of the +algorithm currently used. +Valid values are +.\" +.\" NOTICE: Also make sure to update this, too, as well +.\" +.Ql des +and +.Ql md5 . +.Pp +The +.Fn crypt_set_format +function sets the default encoding format according to the supplied +.Fa string . .Sh RETURN VALUES .Pp .Fn crypt @@ -195,6 +223,10 @@ returns a pointer to the encrypted value on success, and NULL on failure. Note: this is not a standard behaviour, AT&T .Fn crypt will always return a pointer to a string. +.Pp +.Fn crypt_set_format +will return 1 if the supplied encoding format was valid. +Otherwise, a value of 0 is returned. .Sh SEE ALSO .Xr login 1 , .Xr passwd 1 , @@ -206,7 +238,9 @@ The .Fn crypt function returns a pointer to static data, and subsequent calls to .Fn crypt -will modify the same data. +will modify the same data. Likewise, +.Fn crypt_set_format +modifies static data. .Sh HISTORY A rotor-based .Fn crypt @@ -230,6 +264,7 @@ Originally written by .An David Burren Aq davidb@werj.com.au , later additions and changes by .An Poul-henning Kamp , -.An Mark R V Murray -and +.An Mark R V Murray , .An Kris Kennaway . +and +.An Brian Feldman . |
