Vocabulary
crypto.passwd-md5

Inputs
magica string
salta string
passworda string


Outputs
bytesan md5-shadowed password entry


Word description
Encodes the password with the given magic string and salt to an MD5-shadow password entry.

Definition


:: passwd-md5 ( magic salt password -- bytes )
password magic salt 3append salt password dup surround
md5 checksum-bytes password length
[ 16 / ceiling swap <repetition> concat ] keep head-slice
append password [ length make-bits ] [ first ] bi
[ [ 0 ] ] dip [ ? ] curry compose "" map-as append
md5 checksum-bytes :> final! 1000 <iota> [
"" swap {
[ 0 bit? password final ? append ]
[ 3 mod 0 > [ salt append ] when ]
[ 7 mod 0 > [ password append ] when ]
[ 0 bit? final password ? append ]
} cleave md5 checksum-bytes final!
] each magic salt "$" 3append
{ 12 0 6 13 1 7 14 2 8 15 3 9 5 4 10 } final nths 3 group
[ first3 [ 16 shift ] [ 8 shift ] bi* + + 4 to64 ] map
concat 11 final nth 2 to64 3append ;