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Use a constant time equality check for HMAC signature verification

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This commit is contained in:
Edward Wible 2014-08-30 15:36:51 -03:00
parent 96e515d257
commit 8e6be13652
2 changed files with 5 additions and 3 deletions
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3
project.clj
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@ -1,4 +1,4 @@
(defproject clj-jwt "0.0.9"
(defproject clj-jwt "0.0.10"
:description "Clojure library for JSON Web Token(JWT)"
:url "https://github.com/liquidz/clj-jwt"
:license {:name "Eclipse Public License"
@ -7,6 +7,7 @@
[org.clojure/data.json "0.2.5"]
[org.clojure/data.codec "0.1.0"]
[org.bouncycastle/bcprov-jdk15 "1.46"]
[crypto-equality "1.0.0"]
[clj-time "0.8.0"]]
:profiles {:dev {:dependencies [[midje "1.6.3" :exclusions [org.clojure/clojure]]]}}

5
src/clj_jwt/sign.clj
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@ -1,6 +1,7 @@
(ns clj-jwt.sign
(:require
[clj-jwt.base64 :refer [url-safe-encode-str url-safe-decode]]))
[clj-jwt.base64 :refer [url-safe-encode-str url-safe-decode]]
[crypto.equality :as creq]))
(java.security.Security/addProvider
(org.bouncycastle.jce.provider.BouncyCastleProvider.))
@ -17,7 +18,7 @@
(defn- hmac-verify
"Function to verify data and signature with HMAC algorithm."
[alg key body signature & {:keys [charset] :or {charset "UTF-8"}}]
(= signature (hmac-sign alg key body :charset charset)))
(creq/eq? signature (hmac-sign alg key body :charset charset)))
; RSA
(defn- rsa-sign