feat: LRU cache key

src/utils.js

@@ -42,24 +42,7 @@ function ensurePromiseCallback(callback) {
   ]
 }
 
-function hashToken(token) {
-  const rawHeader = token.split('.', 1)[0]
-  const header = Buffer.from(rawHeader, 'base64').toString('utf-8')
-  let hasher = null
-
-  /* istanbul ignore next */
-  if (header.match(edAlgorithmMatcher) && header.match(ed448CurveMatcher)) {
-    hasher = createHash('shake256', { outputLength: 114 })
-  } else {
-    const mo = header.match(algorithmMatcher)
-    hasher = createHash(`sha${mo ? mo[1] : '512'}`)
-  }
-
-  return hasher.update(token).digest('hex')
-}
-
 module.exports = {
   getAsyncKey,
   ensurePromiseCallback,
-  hashToken
 }

src/verifier.js

@@ -6,7 +6,7 @@ const Cache = require('mnemonist/lru-cache')
 const { useNewCrypto, hsAlgorithms, verifySignature, detectPublicKeyAlgorithms } = require('./crypto')
 const createDecoder = require('./decoder')
 const { TokenError } = require('./error')
-const { getAsyncKey, ensurePromiseCallback, hashToken } = require('./utils')
+const { getAsyncKey, ensurePromiseCallback } = require('./utils')
 
 const defaultCacheSize = 1000
 
@@ -93,7 +93,7 @@ function cacheSet(
   if (value instanceof TokenError) {
     const ttl = typeof errorCacheTTL === 'function' ? errorCacheTTL(value) : errorCacheTTL
     cacheValue[2] = (clockTimestamp || Date.now()) + clockTolerance + ttl
-    cache.set(hashToken(token), cacheValue)
+    cache.set(token, cacheValue)
     return value
   }
 
@@ -116,7 +116,7 @@ function cacheSet(
   const maxTTL = (clockTimestamp || Date.now()) + clockTolerance + cacheTTL
   cacheValue[2] = cacheValue[2] === 0 ? maxTTL : Math.min(cacheValue[2], maxTTL)
 
-  cache.set(hashToken(token), cacheValue)
+  cache.set(token, cacheValue)
 
   return value
 }
@@ -280,7 +280,7 @@ function verify(
 
   // Check the cache
   if (cache) {
-    const [value, min, max] = cache.get(hashToken(token)) || [undefined, 0, 0]
+    const [value, min, max] = cache.get(token) || [undefined, 0, 0]
     const now = clockTimestamp || Date.now()
 
     // Validate time range