| 1 | 'use strict'
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| 2 | var cl = require('chloride')
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| 3 |
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| 4 | exports.hash = function (data, enc) {
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| 5 | data = (
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| 6 | 'string' === typeof data && enc == null
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| 7 | ? new Buffer(data, 'binary')
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| 8 | : new Buffer(data, enc)
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| 9 | )
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| 10 | return cl.crypto_hash_sha256(data).toString('base64')+'.sha256'
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| 11 | }
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| 12 |
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| 13 | exports.hasSigil = function hasSigil (s) {
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| 14 | return /^(@|%|&)/.test(s)
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| 15 | }
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| 16 |
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| 17 | function tag (key, tag) {
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| 18 | if(!tag) throw new Error('no tag for:' + key.toString('base64'))
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| 19 | return key.toString('base64')+'.' + tag.replace(/^\./, '')
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| 20 | }
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| 21 |
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| 22 | exports.keysToJSON = function keysToJSON(keys, curve) {
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| 23 | curve = (keys.curve || curve)
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| 24 |
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| 25 | var pub = tag(keys.public.toString('base64'), curve)
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| 26 | return {
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| 27 | curve: curve,
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| 28 | public: pub,
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| 29 | private: keys.private ? tag(keys.private.toString('base64'), curve) : undefined,
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| 30 | id: '@'+(curve === 'ed25519' ? pub : exports.hash(pub))
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| 31 | }
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| 32 | }
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| 33 |
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| 34 | exports.getTag = function getTag (string) {
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| 35 | var i = string.indexOf('.')
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| 36 | return string.substring(i+1)
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| 37 | }
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| 38 |
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| 39 | exports.toBuffer = function (buf) {
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| 40 | if(buf == null) return buf
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| 41 | if(Buffer.isBuffer(buf)) throw new Error('already a buffer')
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| 42 | var i = buf.indexOf('.')
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| 43 | var start = (exports.hasSigil(buf)) ? 1 : 0
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| 44 | return new Buffer(buf.substring(start, ~i ? i : buf.length), 'base64')
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| 45 | }
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