You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
2.2 KiB
92 lines
2.2 KiB
var Buffer = require('safe-buffer').Buffer |
|
var createHash = require('create-hash') |
|
var stream = require('readable-stream') |
|
var inherits = require('inherits') |
|
var sign = require('./sign') |
|
var verify = require('./verify') |
|
|
|
var algorithms = require('./algorithms.json') |
|
Object.keys(algorithms).forEach(function (key) { |
|
algorithms[key].id = Buffer.from(algorithms[key].id, 'hex') |
|
algorithms[key.toLowerCase()] = algorithms[key] |
|
}) |
|
|
|
function Sign (algorithm) { |
|
stream.Writable.call(this) |
|
|
|
var data = algorithms[algorithm] |
|
if (!data) throw new Error('Unknown message digest') |
|
|
|
this._hashType = data.hash |
|
this._hash = createHash(data.hash) |
|
this._tag = data.id |
|
this._signType = data.sign |
|
} |
|
inherits(Sign, stream.Writable) |
|
|
|
Sign.prototype._write = function _write (data, _, done) { |
|
this._hash.update(data) |
|
done() |
|
} |
|
|
|
Sign.prototype.update = function update (data, enc) { |
|
if (typeof data === 'string') data = Buffer.from(data, enc) |
|
|
|
this._hash.update(data) |
|
return this |
|
} |
|
|
|
Sign.prototype.sign = function signMethod (key, enc) { |
|
this.end() |
|
var hash = this._hash.digest() |
|
var sig = sign(hash, key, this._hashType, this._signType, this._tag) |
|
|
|
return enc ? sig.toString(enc) : sig |
|
} |
|
|
|
function Verify (algorithm) { |
|
stream.Writable.call(this) |
|
|
|
var data = algorithms[algorithm] |
|
if (!data) throw new Error('Unknown message digest') |
|
|
|
this._hash = createHash(data.hash) |
|
this._tag = data.id |
|
this._signType = data.sign |
|
} |
|
inherits(Verify, stream.Writable) |
|
|
|
Verify.prototype._write = function _write (data, _, done) { |
|
this._hash.update(data) |
|
done() |
|
} |
|
|
|
Verify.prototype.update = function update (data, enc) { |
|
if (typeof data === 'string') data = Buffer.from(data, enc) |
|
|
|
this._hash.update(data) |
|
return this |
|
} |
|
|
|
Verify.prototype.verify = function verifyMethod (key, sig, enc) { |
|
if (typeof sig === 'string') sig = Buffer.from(sig, enc) |
|
|
|
this.end() |
|
var hash = this._hash.digest() |
|
return verify(sig, hash, key, this._signType, this._tag) |
|
} |
|
|
|
function createSign (algorithm) { |
|
return new Sign(algorithm) |
|
} |
|
|
|
function createVerify (algorithm) { |
|
return new Verify(algorithm) |
|
} |
|
|
|
module.exports = { |
|
Sign: createSign, |
|
Verify: createVerify, |
|
createSign: createSign, |
|
createVerify: createVerify |
|
}
|
|
|