ironclad哈希和couch pbkdf2哈希不匹配

Question

我的问题背景:Fedora 22 64位Linode KVM实例，CouchDB v.1.6.1, SBCL 1.2.16

CouchDB:我创建了一个密码为"testpass"的用户。_users数据库中相应创建的文档包含(除其他内容外):

{ ...
  "password_scheme": "pbkdf2",
   "iterations": 10,
   "name": "test",
   "roles": ["reader"],
   "type": "user",
   "derived_key": "7b0cad0d2762b448b88684332e68988e801195ad",
   "salt": "2e4bcf85f39279ab9d1e1336a00dce0e"
...}

所以在我的lisp repl中，在同一台机器上，我这样做:

REPL>(in-package :ironclad)
REPL>(byte-array-to-hex-string 
         (pbkdf2-hash-password 
             (ascii-string-to-byte-array "testpass") 
             :salt (hex-string-to-byte-array "2e4bcf85f39279ab9d1e1336a00dce0e")
             :digest 'sha1 
             :iterations 10))
"ce55610fe10bc49703f0df95adb6c9c9c71e3f8e"
REPL>

所以ironclad输出的"ce55610fe10bc49703f0df95adb6c9c9c71e3f8e"与couch输出的"7b0cad0d2762b448b88684332e68988e801195ad"不匹配。

我尝试了ironclad中所有支持的消化，但没有运气。有人知道是哪里出了问题吗?

Answer 1

这很简单:CouchDB使用"2e4bcf85f39279ab9d1e1336a00dce0e" salt作为二进制字符串，而您使用hex-string-to-byte-array将其转换为字节数组。去除它会得到不同的盐。很容易检查:

(node1@127.0.0.1)1> couch_passwords:pbkdf2(<<"testpass">>, <<"2e4bcf85f39279ab9d1e1336a00dce0e">>, 10).
<<"7b0cad0d2762b448b88684332e68988e801195ad">>
(node1@127.0.0.1)2> couch_passwords:pbkdf2(<<"testpass">>, <<50,101,52,98,99,102,56,53,102,51,57,50,55,57,97,98,57,100,49,101,49,51,51,54,97,48,48,100,99,101,48,101>>, 10).
<<"7b0cad0d2762b448b88684332e68988e801195ad">>
(node1@127.0.0.1)3> couch_passwords:pbkdf2(<<"testpass">>, <<46,75,207,133,243,146,121,171,157,30,19,54,160,13,206,14>>, 10).
<<"ce55610fe10bc49703f0df95adb6c9c9c71e3f8e">>