69 lines
1.5 KiB
JavaScript
69 lines
1.5 KiB
JavaScript
var sha = require('./sha')
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var rng = require('./rng')
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var algorithms = {
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sha1: {
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hex: sha.hex_sha1,
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binary: sha.b64_sha1,
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ascii: sha.str_sha1
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}
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}
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function error () {
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var m = [].slice.call(arguments).join(' ')
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throw new Error([
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m,
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'we accept pull requests',
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'http://github.com/dominictarr/crypto-browserify'
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].join('\n'))
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}
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exports.createHash = function (alg) {
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alg = alg || 'sha1'
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if(!algorithms[alg])
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error('algorithm:', alg, 'is not yet supported')
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var s = ''
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var _alg = algorithms[alg]
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return {
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update: function (data) {
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s += data
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return this
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},
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digest: function (enc) {
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enc = enc || 'binary'
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var fn
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if(!(fn = _alg[enc]))
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error('encoding:', enc , 'is not yet supported for algorithm', alg)
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var r = fn(s)
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s = null //not meant to use the hash after you've called digest.
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return r
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}
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}
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}
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exports.randomBytes = function(size, callback) {
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if (callback && callback.call) {
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try {
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callback.call(this, undefined, rng(size));
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} catch (err) { callback(err); }
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} else {
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return rng(size);
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}
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}
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// the least I can do is make error messages for the rest of the node.js/crypto api.
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;['createCredentials'
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, 'createHmac'
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, 'createCypher'
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, 'createCypheriv'
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, 'createDecipher'
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, 'createDecipheriv'
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, 'createSign'
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, 'createVerify'
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, 'createDeffieHellman'
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, 'pbkdf2'].forEach(function (name) {
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exports[name] = function () {
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error('sorry,', name, 'is not implemented yet')
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}
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})
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