diff options
Diffstat (limited to 'Utility/Gpg.hs')
| -rw-r--r-- | Utility/Gpg.hs | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/Utility/Gpg.hs b/Utility/Gpg.hs index c31755d62..4a13d456c 100644 --- a/Utility/Gpg.hs +++ b/Utility/Gpg.hs @@ -85,7 +85,8 @@ feedRead params passphrase feeder reader = do reader from {- Finds gpg public keys matching some string. (Could be an email address, - - a key id, or a name. -} + - a key id, or a name; See the section 'HOW TO SPECIFY A USER ID' of + - GnuPG's manpage.) -} findPubKeys :: String -> IO KeyIds findPubKeys for = KeyIds . parse <$> readStrict params where @@ -97,8 +98,8 @@ findPubKeys for = KeyIds . parse <$> readStrict params {- Creates a block of high-quality random data suitable to use as a cipher. - It is armored, to avoid newlines, since gpg only reads ciphers up to the - first newline. -} -genRandom :: Int -> IO String -genRandom size = checksize <$> readStrict +genRandom :: Bool -> Int -> IO String +genRandom highQuality size = checksize <$> readStrict [ Params params , Param $ show randomquality , Param $ show size @@ -106,8 +107,13 @@ genRandom size = checksize <$> readStrict where params = "--gen-random --armor" - -- 1 is /dev/urandom; 2 is /dev/random - randomquality = 1 :: Int + -- See http://www.gnupg.org/documentation/manuals/gcrypt/Quality-of-random-numbers.html + -- for the meaning of random quality levels. + -- The highest available is 2, which is the default for OpenPGP + -- key generation; Note that it uses the blocking PRNG /dev/random + -- on the Linux kernel, hence the running time may take a while. + randomquality :: Int + randomquality = if highQuality then 2 else 1 {- The size is the number of bytes of entropy desired; the data is - base64 encoded, so needs 8 bits to represent every 6 bytes of |