40ecf58d4b
This does not change the overall license of the git-annex program, which was already AGPL due to a number of sources files being AGPL already. Legally speaking, I'm adding a new license under which these files are now available; I already released their current contents under the GPL license. Now they're dual licensed GPL and AGPL. However, I intend for all my future changes to these files to only be released under the AGPL license, and I won't be tracking the dual licensing status, so I'm simply changing the license statement to say it's AGPL. (In some cases, others wrote parts of the code of a file and released it under the GPL; but in all cases I have contributed a significant portion of the code in each file and it's that code that is getting the AGPL license; the GPL license of other contributors allows combining with AGPL code.)
58 lines
1.4 KiB
Haskell
58 lines
1.4 KiB
Haskell
{- git-annex crypto types
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-
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- Copyright 2011-2015 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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module Types.Crypto (
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Cipher(..),
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StorableCipher(..),
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EncryptedCipherVariant(..),
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KeyIds(..),
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cipherKeyIds,
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Mac(..),
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readMac,
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showMac,
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defaultMac,
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calcMac,
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) where
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import Utility.Hash
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import Utility.Gpg (KeyIds(..))
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-- XXX ideally, this would be a locked memory region
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data Cipher = Cipher String | MacOnlyCipher String
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data StorableCipher
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= EncryptedCipher String EncryptedCipherVariant KeyIds
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| SharedCipher String
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| SharedPubKeyCipher String KeyIds
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deriving (Ord, Eq)
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data EncryptedCipherVariant = Hybrid | PubKey
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deriving (Ord, Eq)
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cipherKeyIds :: StorableCipher -> Maybe KeyIds
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cipherKeyIds (EncryptedCipher _ _ ks) = Just ks
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cipherKeyIds (SharedPubKeyCipher _ ks) = Just ks
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cipherKeyIds (SharedCipher _) = Nothing
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defaultMac :: Mac
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defaultMac = HmacSha1
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-- MAC algorithms are shown as follows in the file names.
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showMac :: Mac -> String
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showMac HmacSha1 = "HMACSHA1"
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showMac HmacSha224 = "HMACSHA224"
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showMac HmacSha256 = "HMACSHA256"
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showMac HmacSha384 = "HMACSHA384"
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showMac HmacSha512 = "HMACSHA512"
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-- Read the MAC algorithm from the remote config.
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readMac :: String -> Maybe Mac
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readMac "HMACSHA1" = Just HmacSha1
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readMac "HMACSHA224" = Just HmacSha224
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readMac "HMACSHA256" = Just HmacSha256
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readMac "HMACSHA384" = Just HmacSha384
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readMac "HMACSHA512" = Just HmacSha512
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readMac _ = Nothing
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