First commit

node_modules/@ldapjs/dn/lib/utils/parse-string/find-name-end.js

@@ -0,0 +1,58 @@
+'use strict'
+
+/**
+ * Find the ending position of the attribute type name portion of an RDN.
+ * This function does not verify if the name is a valid description string
+ * or numeric OID. It merely reads a string from the given starting position
+ * to the spec defined end of an attribute type string.
+ *
+ * @param {Buffer} searchBuffer A buffer representing the RDN.
+ * @param {number} startPos The position in the `searchBuffer` to start
+ * searching from.
+ *
+ * @returns {number} The position of the end of the RDN's attribute type name,
+ * or `-1` if an invalid character has been encountered.
+ */
+module.exports = function findNameEnd ({ searchBuffer, startPos }) {
+  let pos = startPos
+
+  while (pos < searchBuffer.byteLength) {
+    const char = searchBuffer[pos]
+    if (char === 0x20 || char === 0x3d) {
+      // Name ends with a space or an '=' character.
+      break
+    }
+    if (isValidNameChar(char) === true) {
+      pos += 1
+      continue
+    }
+    return -1
+  }
+
+  return pos
+}
+
+/**
+ * Determine if a character is a valid `attributeType` character as defined
+ * in RFC 4514 §3.
+ *
+ * @param {number} c The character to verify. Should be the byte representation
+ * of the character from a {@link Buffer} instance.
+ *
+ * @returns {boolean}
+ */
+function isValidNameChar (c) {
+  if (c >= 0x41 && c <= 0x5a) { // A - Z
+    return true
+  }
+  if (c >= 0x61 && c <= 0x7a) { // a - z
+    return true
+  }
+  if (c >= 0x30 && c <= 0x39) { // 0 - 9
+    return true
+  }
+  if (c === 0x2d || c === 0x2e) { // - or .
+    return true
+  }
+  return false
+}