Initial commit

node_modules/@panva/asn1.js/lib/asn1/decoders/pem.js

@@ -0,0 +1,44 @@
+const { inherits } = require('util')
+
+const DERDecoder = require('./der')
+
+function PEMDecoder (entity) {
+  DERDecoder.call(this, entity)
+  this.enc = 'pem'
+}
+inherits(PEMDecoder, DERDecoder)
+
+PEMDecoder.prototype.decode = function decode (data, options) {
+  const lines = data.toString().split(/[\r\n]+/g)
+
+  const label = options.label.toUpperCase()
+
+  const re = /^-----(BEGIN|END) ([^-]+)-----$/
+  let start = -1
+  let end = -1
+  for (let i = 0; i < lines.length; i++) {
+    const match = lines[i].match(re)
+    if (match === null) { continue }
+
+    if (match[2] !== label) { continue }
+
+    if (start === -1) {
+      if (match[1] !== 'BEGIN') { break }
+      start = i
+    } else {
+      if (match[1] !== 'END') { break }
+      end = i
+      break
+    }
+  }
+  if (start === -1 || end === -1) { throw new Error(`PEM section not found for: ${label}`) }
+
+  const base64 = lines.slice(start + 1, end).join('')
+  // Remove excessive symbols
+  base64.replace(/[^a-z0-9+/=]+/gi, '')
+
+  const input = Buffer.from(base64, 'base64')
+  return DERDecoder.prototype.decode.call(this, input, options)
+}
+
+module.exports = PEMDecoder