Change endpoint from persons to people

backend/apis/nodejs/node_modules/nodemailer/lib/dkim/relaxed-body.js

@@ -0,0 +1,154 @@
+'use strict';
+
+// streams through a message body and calculates relaxed body hash
+
+const Transform = require('stream').Transform;
+const crypto = require('crypto');
+
+class RelaxedBody extends Transform {
+    constructor(options) {
+        super();
+        options = options || {};
+        this.chunkBuffer = [];
+        this.chunkBufferLen = 0;
+        this.bodyHash = crypto.createHash(options.hashAlgo || 'sha1');
+        this.remainder = '';
+        this.byteLength = 0;
+
+        this.debug = options.debug;
+        this._debugBody = options.debug ? [] : false;
+    }
+
+    updateHash(chunk) {
+        let bodyStr;
+
+        // find next remainder
+        let nextRemainder = '';
+
+        // This crux finds and removes the spaces from the last line and the newline characters after the last non-empty line
+        // If we get another chunk that does not match this description then we can restore the previously processed data
+        let state = 'file';
+        for (let i = chunk.length - 1; i >= 0; i--) {
+            let c = chunk[i];
+
+            if (state === 'file' && (c === 0x0a || c === 0x0d)) {
+                // do nothing, found \n or \r at the end of chunk, stil end of file
+            } else if (state === 'file' && (c === 0x09 || c === 0x20)) {
+                // switch to line ending mode, this is the last non-empty line
+                state = 'line';
+            } else if (state === 'line' && (c === 0x09 || c === 0x20)) {
+                // do nothing, found ' ' or \t at the end of line, keep processing the last non-empty line
+            } else if (state === 'file' || state === 'line') {
+                // non line/file ending character found, switch to body mode
+                state = 'body';
+                if (i === chunk.length - 1) {
+                    // final char is not part of line end or file end, so do nothing
+                    break;
+                }
+            }
+
+            if (i === 0) {
+                // reached to the beginning of the chunk, check if it is still about the ending
+                // and if the remainder also matches
+                if (
+                    (state === 'file' && (!this.remainder || /[\r\n]$/.test(this.remainder))) ||
+                    (state === 'line' && (!this.remainder || /[ \t]$/.test(this.remainder)))
+                ) {
+                    // keep everything
+                    this.remainder += chunk.toString('binary');
+                    return;
+                } else if (state === 'line' || state === 'file') {
+                    // process existing remainder as normal line but store the current chunk
+                    nextRemainder = chunk.toString('binary');
+                    chunk = false;
+                    break;
+                }
+            }
+
+            if (state !== 'body') {
+                continue;
+            }
+
+            // reached first non ending byte
+            nextRemainder = chunk.slice(i + 1).toString('binary');
+            chunk = chunk.slice(0, i + 1);
+            break;
+        }
+
+        let needsFixing = !!this.remainder;
+        if (chunk && !needsFixing) {
+            // check if we even need to change anything
+            for (let i = 0, len = chunk.length; i < len; i++) {
+                if (i && chunk[i] === 0x0a && chunk[i - 1] !== 0x0d) {
+                    // missing \r before \n
+                    needsFixing = true;
+                    break;
+                } else if (i && chunk[i] === 0x0d && chunk[i - 1] === 0x20) {
+                    // trailing WSP found
+                    needsFixing = true;
+                    break;
+                } else if (i && chunk[i] === 0x20 && chunk[i - 1] === 0x20) {
+                    // multiple spaces found, needs to be replaced with just one
+                    needsFixing = true;
+                    break;
+                } else if (chunk[i] === 0x09) {
+                    // TAB found, needs to be replaced with a space
+                    needsFixing = true;
+                    break;
+                }
+            }
+        }
+
+        if (needsFixing) {
+            bodyStr = this.remainder + (chunk ? chunk.toString('binary') : '');
+            this.remainder = nextRemainder;
+            bodyStr = bodyStr
+                .replace(/\r?\n/g, '\n') // use js line endings
+                .replace(/[ \t]*$/gm, '') // remove line endings, rtrim
+                .replace(/[ \t]+/gm, ' ') // single spaces
+                .replace(/\n/g, '\r\n'); // restore rfc822 line endings
+            chunk = Buffer.from(bodyStr, 'binary');
+        } else if (nextRemainder) {
+            this.remainder = nextRemainder;
+        }
+
+        if (this.debug) {
+            this._debugBody.push(chunk);
+        }
+        this.bodyHash.update(chunk);
+    }
+
+    _transform(chunk, encoding, callback) {
+        if (!chunk || !chunk.length) {
+            return callback();
+        }
+
+        if (typeof chunk === 'string') {
+            chunk = Buffer.from(chunk, encoding);
+        }
+
+        this.updateHash(chunk);
+
+        this.byteLength += chunk.length;
+        this.push(chunk);
+        callback();
+    }
+
+    _flush(callback) {
+        // generate final hash and emit it
+        if (/[\r\n]$/.test(this.remainder) && this.byteLength > 2) {
+            // add terminating line end
+            this.bodyHash.update(Buffer.from('\r\n'));
+        }
+        if (!this.byteLength) {
+            // emit empty line buffer to keep the stream flowing
+            this.push(Buffer.from('\r\n'));
+            // this.bodyHash.update(Buffer.from('\r\n'));
+        }
+
+        this.emit('hash', this.bodyHash.digest('base64'), this.debug ? Buffer.concat(this._debugBody) : false);
+        callback();
+    }
+}
+
+module.exports = RelaxedBody;