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76 lines
2.9 KiB
Plaintext
76 lines
2.9 KiB
Plaintext
/*
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* Copyright (c) 2013-2016 Galois, Inc.
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* Distributed under the terms of the BSD3 license (see LICENSE file)
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*/
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module Keys where
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import CfrgCurves
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import Blake2s
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import SCrypt
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import Base58
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type MinilockID = [46][8]
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// Given a public key compute the ASCII ID
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encodeID : Public25519 -> MinilockID
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encodeID pub = base58enc (join (pub # [h]))
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where
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h = blake2s `{nn=1} pub : [8]
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decodeID : MinilockID -> (Bit,Public25519)
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decodeID ident = (hComp == hRecv, key)
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where
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bs = split (base58dec ident) : [33][8]
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hRecv = bs ! 0
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hComp = blake2s `{nn=1} key : [8]
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key = take bs : [32][8]
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// Accept a possibly-short key (base58 is value dependent encoding)
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// and expand it to the full, fixed, size.
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mkFullLengthID : {n} (46 >= n, n>= 1) => [n][8] -> MinilockID
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mkFullLengthID n = drop (['1' | _ <- [0..45] : [_][8]] # n)
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mkID : {passBytes, saltBytes}
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( fin passBytes, fin saltBytes
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, 64 >= width passBytes
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, 32 >= width (4*saltBytes)
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)
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=> [passBytes][8] -> [saltBytes][8] -> (MinilockID,Private25519)
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mkID pw email = (encodeID pub,priv)
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where
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// XXX wait for cryptol 2.3: priv = SCrypt `{N=2^^17,r=8} (split (blake2s `{nn=32} pw)) email
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priv : Private25519
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priv = SCrypt `{N=2^^1,r=8} (split (blake2s `{nn=32} pw)) email
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// XXX we can't interpret N=2^^17 so this N value is a place holder...
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pub = Curve25519 priv basePoint25519
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// XXX we can not run these tests in the cryptol interpreter, SCrypt is too expensive.
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testPass = "some bears eat all the honey in the jar"
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testEmail = "example@example.com"
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testID : MinilockID
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testID = mkFullLengthID "28ZvW9rqRqvqpFTtHnusUntRqrxb4qqZAaNAd3QsqjSsXq"
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testID_computed = "28ZvW9rqRqvqpFTtHnusUntRqrxb4qqZAaNAd3QsqjSsXq" // Computed on deathstar
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testPriv_computed =
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[0x12, 0x86, 0xe0, 0x18, 0xc6, 0x68, 0x34, 0x96, 0x09, 0x2e, 0x53,
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0x32, 0x37, 0x76, 0x80, 0x3c, 0x30, 0xb4, 0x75, 0x2d, 0xd7, 0x70,
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0xea, 0xa9, 0x6f, 0x0d, 0xda, 0x25, 0xc7, 0xfe, 0x28, 0x1f]
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// Deathstar results:
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// ([0x32, 0x38, 0x5a, 0x76, 0x57, 0x39, 0x72, 0x71, 0x52, 0x71, 0x76,
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// 0x71, 0x70, 0x46, 0x54, 0x74, 0x48, 0x6e, 0x75, 0x73, 0x55, 0x6e,
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// 0x74, 0x52, 0x71, 0x72, 0x78, 0x62, 0x34, 0x71, 0x71, 0x5a, 0x41,
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// 0x61, 0x4e, 0x41, 0x64, 0x33, 0x51, 0x73, 0x71, 0x6a, 0x53, 0x73,
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// 0x58, 0x71],
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// [0x12, 0x86, 0xe0, 0x18, 0xc6, 0x68, 0x34, 0x96, 0x09, 0x2e, 0x53,
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// 0x32, 0x37, 0x76, 0x80, 0x3c, 0x30, 0xb4, 0x75, 0x2d, 0xd7, 0x70,
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// 0xea, 0xa9, 0x6f, 0x0d, 0xda, 0x25, 0xc7, 0xfe, 0x28, 0x1f])
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// testPriv : Private25519
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testPriv = [0x12, 0x86, 0xe0, 0x18, 0xc6, 0x68, 0x34, 0x96, 0x09, 0x2e, 0x53, 0x32, 0x37, 0x76, 0x80, 0x3c, 0x30, 0xb4, 0x75, 0x2d, 0xd7, 0x70,0xea, 0xa9, 0x6f, 0x0d, 0xda, 0x25, 0xc7, 0xfe, 0x28, 0x1f]
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testPub = Curve25519 testPriv basePoint25519
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property kat_pub_id_eq = testPub == (decodeID testID).1 /\ encodeID testPub == testID /\ testID == testID_computed /\ testPriv == testPriv_computed
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