diff options
Diffstat (limited to 'SSHKey.hs')
-rw-r--r-- | SSHKey.hs | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/SSHKey.hs b/SSHKey.hs deleted file mode 100644 index 488f55f..0000000 --- a/SSHKey.hs +++ /dev/null | |||
@@ -1,49 +0,0 @@ | |||
1 | {-# LANGUAGE OverloadedStrings #-} | ||
2 | module SSHKey where | ||
3 | |||
4 | import qualified Data.ByteString.Lazy.Char8 as L8 | ||
5 | import qualified Data.ByteString.Lazy as L | ||
6 | import qualified Codec.Binary.Base64 as Base64 | ||
7 | import Data.Binary.Get ( runGet ) | ||
8 | import Data.Binary.Put ( putWord32be, runPut, putByteString ) | ||
9 | import Data.Binary ( get, put ) | ||
10 | import Data.Monoid ( (<>) ) | ||
11 | import Data.Maybe ( listToMaybe ) | ||
12 | import Data.Char ( isSpace ) | ||
13 | import Control.Monad ( guard ) | ||
14 | import LengthPrefixedBE | ||
15 | |||
16 | type Key = (Integer,Integer) | ||
17 | |||
18 | keyblob :: Key -> L.ByteString | ||
19 | keyblob (n,e) = "ssh-rsa " <> blob | ||
20 | where | ||
21 | bs = sshrsa e n | ||
22 | blob = L8.pack $ Base64.encode (L.unpack bs) | ||
23 | |||
24 | sshrsa :: Integer -> Integer -> L.ByteString | ||
25 | sshrsa e n = runPut $ do | ||
26 | putWord32be 7 | ||
27 | putByteString "ssh-rsa" | ||
28 | put (LengthPrefixedBE e) | ||
29 | put (LengthPrefixedBE n) | ||
30 | |||
31 | blobkey :: L8.ByteString -> Maybe Key | ||
32 | blobkey bs = do | ||
33 | let (pre,bs1) = L8.splitAt 7 bs | ||
34 | guard $ pre == "ssh-rsa" | ||
35 | let (sp,bs2) = L8.span isSpace bs1 | ||
36 | guard $ not (L8.null sp) | ||
37 | bs3 <- listToMaybe $ L8.words bs2 | ||
38 | qq <- L.pack `fmap` Base64.decode (L8.unpack bs3) | ||
39 | decode_sshrsa qq | ||
40 | where | ||
41 | decode_sshrsa :: L8.ByteString -> Maybe Key | ||
42 | decode_sshrsa bs = do | ||
43 | let (pre,bs1) = L8.splitAt 11 bs | ||
44 | guard $ pre == runPut (putWord32be 7 >> putByteString "ssh-rsa") | ||
45 | let rsakey = flip runGet bs1 $ do | ||
46 | LengthPrefixedBE e <- get | ||
47 | LengthPrefixedBE n <- get | ||
48 | return (n,e) | ||
49 | return rsakey | ||