42 lines
1.2 KiB
JavaScript
42 lines
1.2 KiB
JavaScript
/**
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* Browser Bitmessage crypto implementation.
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* Documentation: <http://www.w3.org/TR/WebCryptoAPI/>
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* Browsers support: <http://caniuse.com/#feat=cryptography>
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* Blink implementation details: <https://sites.google.com/a/chromium.org/dev/blink/webcrypto>
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*/
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"use strict";
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require("es6-promise").polyfill();
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var assert = require("assert");
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var ripemd160 = require("ripemd160");
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// Support `webkit` prefix for Safari (not tested yet).
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// TODO(Kagami): Try to support IE11.
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var subtle = window.crypto.subtle || window.crypto.webkitSubtle;
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assert(subtle, "WebCryptoAPI is not supported");
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exports.sha512 = function(buf) {
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return subtle.digest({name: "SHA-512"}, buf).then(function(arr) {
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return new Buffer(new Uint8Array(arr));
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});
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};
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exports.sha256 = function(buf) {
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return subtle.digest({name: "SHA-256"}, buf).then(function(arr) {
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return new Buffer(new Uint8Array(arr));
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});
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};
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exports.ripemd160 = function(buf) {
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// XXX(Kagami): No support in browsers via Web Crypto API currently,
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// so use module.
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return Promise.resolve(ripemd160(buf));
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};
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exports.randomBytes = function(size) {
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var arr = new Uint8Array(size);
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window.crypto.getRandomValues(arr);
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return new Buffer(arr);
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};
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