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authorYaroslav De La Peña Smirnov <yaros.rus_89@live.com.mx>2017-11-29 11:44:34 +0300
committerYaroslav De La Peña Smirnov <yaros.rus_89@live.com.mx>2017-11-29 11:44:34 +0300
commit67fdec20726e48ba3a934cb25bb30d47ec4a4f29 (patch)
tree37fd9f4f0b0c20103e1646fc83021e4765de3680 /node_modules/base64id/lib
downloadspanish-checkers-67fdec20726e48ba3a934cb25bb30d47ec4a4f29.tar.gz
spanish-checkers-67fdec20726e48ba3a934cb25bb30d47ec4a4f29.zip
Initial commit, version 0.5.3
Diffstat (limited to 'node_modules/base64id/lib')
-rw-r--r--node_modules/base64id/lib/base64id.js103
1 files changed, 103 insertions, 0 deletions
diff --git a/node_modules/base64id/lib/base64id.js b/node_modules/base64id/lib/base64id.js
new file mode 100644
index 0000000..f688159
--- /dev/null
+++ b/node_modules/base64id/lib/base64id.js
@@ -0,0 +1,103 @@
+/*!
+ * base64id v0.1.0
+ */
+
+/**
+ * Module dependencies
+ */
+
+var crypto = require('crypto');
+
+/**
+ * Constructor
+ */
+
+var Base64Id = function() { };
+
+/**
+ * Get random bytes
+ *
+ * Uses a buffer if available, falls back to crypto.randomBytes
+ */
+
+Base64Id.prototype.getRandomBytes = function(bytes) {
+
+ var BUFFER_SIZE = 4096
+ var self = this;
+
+ bytes = bytes || 12;
+
+ if (bytes > BUFFER_SIZE) {
+ return crypto.randomBytes(bytes);
+ }
+
+ var bytesInBuffer = parseInt(BUFFER_SIZE/bytes);
+ var threshold = parseInt(bytesInBuffer*0.85);
+
+ if (!threshold) {
+ return crypto.randomBytes(bytes);
+ }
+
+ if (this.bytesBufferIndex == null) {
+ this.bytesBufferIndex = -1;
+ }
+
+ if (this.bytesBufferIndex == bytesInBuffer) {
+ this.bytesBuffer = null;
+ this.bytesBufferIndex = -1;
+ }
+
+ // No buffered bytes available or index above threshold
+ if (this.bytesBufferIndex == -1 || this.bytesBufferIndex > threshold) {
+
+ if (!this.isGeneratingBytes) {
+ this.isGeneratingBytes = true;
+ crypto.randomBytes(BUFFER_SIZE, function(err, bytes) {
+ self.bytesBuffer = bytes;
+ self.bytesBufferIndex = 0;
+ self.isGeneratingBytes = false;
+ });
+ }
+
+ // Fall back to sync call when no buffered bytes are available
+ if (this.bytesBufferIndex == -1) {
+ return crypto.randomBytes(bytes);
+ }
+ }
+
+ var result = this.bytesBuffer.slice(bytes*this.bytesBufferIndex, bytes*(this.bytesBufferIndex+1));
+ this.bytesBufferIndex++;
+
+ return result;
+}
+
+/**
+ * Generates a base64 id
+ *
+ * (Original version from socket.io <http://socket.io>)
+ */
+
+Base64Id.prototype.generateId = function () {
+ var rand = new Buffer(15); // multiple of 3 for base64
+ if (!rand.writeInt32BE) {
+ return Math.abs(Math.random() * Math.random() * Date.now() | 0).toString()
+ + Math.abs(Math.random() * Math.random() * Date.now() | 0).toString();
+ }
+ this.sequenceNumber = (this.sequenceNumber + 1) | 0;
+ rand.writeInt32BE(this.sequenceNumber, 11);
+ if (crypto.randomBytes) {
+ this.getRandomBytes(12).copy(rand);
+ } else {
+ // not secure for node 0.4
+ [0, 4, 8].forEach(function(i) {
+ rand.writeInt32BE(Math.random() * Math.pow(2, 32) | 0, i);
+ });
+ }
+ return rand.toString('base64').replace(/\//g, '_').replace(/\+/g, '-');
+};
+
+/**
+ * Export
+ */
+
+exports = module.exports = new Base64Id();