node js hash string

Question

I have a string that I want to hash  What s the easiest way to generate the hash in node js   The hash is for versioning  not security

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sha256  quot string or binary quot     I experienced issue with other answer  I advice you to set encoding argument to binary to use the byte string and prevent different hash between Javascript  NodeJS  and other langage service like Python  PHP  Github    If you don t use this code  you can get a different hash between NodeJS and Python    How to get the same hash that Python  PHP  Perl  Github  and prevent an issue     NodeJS is hashing the UTF-8 representation of the string  Other languages  like Python  PHP or PERL     are hashing the byte string   We can add binary argument to use the byte string  Code   const crypto   require  quot crypto quot     function sha256 data        return crypto createHash  quot sha256 quot   update data   quot binary quot   digest  quot base64 quot                                                         ------  binary  hash the byte string    sha256  quot string or binary quot     Documentation   crypto createHash algorithm   options    The algorithm is dependent on the available algorithms supported by the version of OpenSSL on the platform  hash digest  encoding    The encoding can be  hex    latin1  or  base64    base 64 is less longer    You can get the issue with   sha256  quot  xac quot     quot  xd1 quot    quot  xb9 quot    quot  xe2 quot    quot  xbb quot    quot  x93 quot   etc     Other languages  like PHP  Python  Perl     and my solution with  update data   quot binary quot       sha1  quot  xac quot     39527c59247a39d18ad48b9947ea738396a3bc47   Nodejs by default  without binary      sha1  quot  xac quot     f50eb35d94f1d75480496e54f4b4a472a9148752

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Here you can benchmark all supported hashes on your hardware  supported by your version of node js  Some are cryptographic  and some is just for a checksum  Its calculating  Hello World  1 million times for each algorithm  It may take around 1-15 seconds for each algorithm  Tested on the Standard Google Computing Engine with Node js 4 2 2    for var i1 0 i1 lt crypto getHashes   length i1       var Algh crypto getHashes   i1     console time Algh     for var i2 0 i2 lt 1000000 i2         crypto createHash Algh  update  Hello World   digest  hex          console timeEnd Algh         Result  DSA  1992ms DSA-SHA  1960ms DSA-SHA1  2062ms DSA-SHA1-old  2124ms RSA-MD4  1893ms RSA-MD5  1982ms RSA-MDC2  2797ms RSA-RIPEMD160  2101ms RSA-SHA  1948ms RSA-SHA1  1908ms RSA-SHA1-2  2042ms RSA-SHA224  2176ms RSA-SHA256  2158ms RSA-SHA384  2290ms RSA-SHA512  2357ms dsaEncryption  1936ms dsaWithSHA  1910ms dsaWithSHA1  1926ms dss1  1928ms ecdsa-with-SHA1  1880ms md4  1833ms md4WithRSAEncryption  1925ms md5  1863ms md5WithRSAEncryption  1923ms mdc2  2729ms mdc2WithRSA  2890ms ripemd  2101ms ripemd160  2153ms ripemd160WithRSA  2210ms rmd160  2146ms sha  1929ms sha1  1880ms sha1WithRSAEncryption  1957ms sha224  2121ms sha224WithRSAEncryption  2290ms sha256  2134ms sha256WithRSAEncryption  2190ms sha384  2181ms sha384WithRSAEncryption  2343ms sha512  2371ms sha512WithRSAEncryption  2434ms shaWithRSAEncryption  1966ms ssl2-md5  1853ms ssl3-md5  1868ms ssl3-sha1  1971ms whirlpool  2578ms

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Simple One Liners   If you want UTF8 text hash   const hash   require  crypto   createHash  sha256   update  Hash me    utf8   digest  hex      If you want to get the same hash with Python  PHP  Perl  Github   const hash   require  crypto   createHash  sha256   update  Hash me    binary   digest  hex      You can also replace  sha256  with  sha1    md5    sha256    sha512

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function md5 a        var r   0          c           return h a        function h t            return u l m t               function l t            return p g f t   8   t length              function u t            for  var e  i   r    0123456789ABCDEF     0123456789abcdef   n       o   0  o  lt  t length  o                e   t charCodeAt o               n    i charAt e  gt  gt  gt  4  amp  15    i charAt 15  amp  e           return n            function m t            for  var e  i  n       o   -1    o  lt  t length               e   t charCodeAt o               i   o   1  lt  t length   t charCodeAt o   1    0              55296  lt   e  amp  amp  e  lt   56319  amp  amp  56320  lt   i  amp  amp  i  lt   57343  amp  amp   e   65536     1023  amp  e   lt  lt  10     1023  amp  i                   o                 e  lt   127   n    String fromCharCode e    e  lt   2047   n    String fromCharCode 192   e  gt  gt  gt  6  amp  31  128   63  amp  e    e  lt   65535   n    String fromCharCode 224   e  gt  gt  gt  12  amp  15  128   e  gt  gt  gt  6  amp  63  128   63  amp  e    e  lt   2097151  amp  amp   n    String fromCharCode 240   e  gt  gt  gt  18  amp  7  128   e  gt  gt  gt  12  amp  63  128   e  gt  gt  gt  6  amp  63  128   63  amp  e            return n            function f t            for  var e   Array t length  gt  gt  2   i   0  i  lt  e length  i                e i    0          for  i   0  i  lt  8   t length  i    8              e i  gt  gt  5      255  amp  t charCodeAt i   8    lt  lt  i   32          return e            function p t            for  var e       i   0  i  lt  32   t length  i    8              e    String fromCharCode t i  gt  gt  5   gt  gt  gt  i   32  amp  255           return e            function g t  e            t e  gt  gt  5     128  lt  lt  e   32              t 14    e   64  gt  gt  gt  9  lt  lt  4     e          for  var i   1732584193  n   -271733879  o   -1732584194  s   271733878  a   0  a  lt  t length  a    16                var r   i                  c   n                  h   o                  l   s              n   E n   E n   E n   E n   N n   N n   N n   N n   C n   C n   C n   C n   S n   S n   S n   S n  o   S o  s   S s  i   S i  n  o  s  t a   0   7  -680876936   n  o  t a   1   12  -389564586   i  n  t a   2   17  606105819   s  i  t a   3   22  -1044525330   o   S o  s   S s  i   S i  n  o  s  t a   4   7  -176418897   n  o  t a   5   12  1200080426   i  n  t a   6   17  -1473231341   s  i  t a   7   22  -45705983   o   S o  s   S s  i   S i  n  o  s  t a   8   7  1770035416   n  o  t a   9   12  -1958414417   i  n  t a   10   17  -42063   s  i  t a   11   22  -1990404162   o   S o  s   S s  i   S i  n  o  s  t a   12   7  1804603682   n  o  t a   13   12  -40341101   i  n  t a   14   17  -1502002290   s  i  t a   15   22  1236535329   o   C o  s   C s  i   C i  n  o  s  t a   1   5  -165796510   n  o  t a   6   9  -1069501632   i  n  t a   11   14  643717713   s  i  t a   0   20  -373897302   o   C o  s   C s  i   C i  n  o  s  t a   5   5  -701558691   n  o  t a   10   9  38016083   i  n  t a   15   14  -660478335   s  i  t a   4   20  -405537848   o   C o  s   C s  i   C i  n  o  s  t a   9   5  568446438   n  o  t a   14   9  -1019803690   i  n  t a   3   14  -187363961   s  i  t a   8   20  1163531501   o   C o  s   C s  i   C i  n  o  s  t a   13   5  -1444681467   n  o  t a   2   9  -51403784   i  n  t a   7   14  1735328473   s  i  t a   12   20  -1926607734   o   N o  s   N s  i   N i  n  o  s  t a   5   4  -378558   n  o  t a   8   11  -2022574463   i  n  t a   11   16  1839030562   s  i  t a   14   23  -35309556   o   N o  s   N s  i   N i  n  o  s  t a   1   4  -1530992060   n  o  t a   4   11  1272893353   i  n  t a   7   16  -155497632   s  i  t a   10   23  -1094730640   o   N o  s   N s  i   N i  n  o  s  t a   13   4  681279174   n  o  t a   0   11  -358537222   i  n  t a   3   16  -722521979   s  i  t a   6   23  76029189   o   N o  s   N s  i   N i  n  o  s  t a   9   4  -640364487   n  o  t a   12   11  -421815835   i  n  t a   15   16  530742520   s  i  t a   2   23  -995338651   o   E o  s   E s  i   E i  n  o  s  t a   0   6  -198630844   n  o  t a   7   10  1126891415   i  n  t a   14   15  -1416354905   s  i  t a   5   21  -57434055   o   E o  s   E s  i   E i  n  o  s  t a   12   6  1700485571   n  o  t a   3   10  -1894986606   i  n  t a   10   15  -1051523   s  i  t a   1   21  -2054922799   o   E o  s   E s  i   E i  n  o  s  t a   8   6  1873313359   n  o  t a   15   10  -30611744   i  n  t a   6   15  -1560198380   s  i  t a   13   21  1309151649   o   E o  s   E s  i   E i  n  o  s  t a   4   6  -145523070   n  o  t a   11   10  -1120210379   i  n  t a   2   15  718787259   s  i  t a   9   21  -343485551                   i   v i  r                   n   v n  c                   o   v o  h                   s   v s  l                    return  i  n  o  s             function   t  e  i  n  o  s            return v  a   v v e  t   v n  s     lt  lt   r   o    a  gt  gt  gt  32 - r  i           var a  r            function S t  e  i  n  o  s  a            return   e  amp  i    e  amp  n  t  e  o  s  a             function C t  e  i  n  o  s  a            return   e  amp  n   i  amp   n  t  e  o  s  a             function N t  e  i  n  o  s  a            return   e   i   n  t  e  o  s  a             function E t  e  i  n  o  s  a            return   i    e    n   t  e  o  s  a             function v t  e            var i    65535  amp  t     65535  amp  e           return  t  gt  gt  16     e  gt  gt  16     i  gt  gt  16   lt  lt  16   65535  amp  i         string    hello   console log md5 string

User · Answer

Take a look at crypto createHash algorithm   var filename   process argv 2   var crypto   require  crypto    var fs   require  fs     var md5sum   crypto createHash  md5     var s   fs ReadStream filename   s on  data   function d      md5sum update d        s on  end   function       var d   md5sum digest  hex      console log d          filename

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The crypto module makes this very easy    Setup       import crypto from  crypto   const crypto   require  crypto     const sha256   x   gt  crypto createHash  sha256   update x   utf8   digest  hex      Usage    sha256  Hello  world

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I use blueimp-md5 which is  Compatible with server-side environments like Node js  module loaders like RequireJS  Browserify or webpack and all web browsers    Use it like this   var md5   require  blueimp-md5     var myHashedString   createHash  GreensterRox     createHash myString       return md5 myString       If passing hashed values around in the open it s always a good idea to salt them so that it is harder for people to recreate them   createHash myString       var salt    HnasBzbxH9       return md5 myString salt

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Node s crypto module API is still unstable   As of version 4 0 0  the native Crypto module is not unstable anymore  From the official documentation      Crypto      Stability  2 - Stable      The API has proven satisfactory  Compatibility with the npm ecosystem   is a high priority  and will not be broken unless absolutely necessary    So  it should be considered safe to use the native implementation  without external dependencies   For reference  the modules mentioned bellow were suggested as alternative solutions when the Crypto module was still unstable     You could also use one of the modules sha1 or md5 which both do the job     npm install sha1   and then  var sha1   require  sha1     var hash   sha1  my message     console log hash      104ab42f1193c336aa2cf08a2c946d5c6fd0fcdb   or    npm install md5   and then  var md5   require  md5     var hash   md5  my message     console log hash      8ba6c19dc1def5702ff5acbf2aeea5aa    MD5 is insecure but often used by services like Gravatar    The API of these modules won t change

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If you just want to md5 hash a simple string I found this works for me   var crypto   require  crypto    var name    braitsch   var hash   crypto createHash  md5   update name  digest  hex    console log hash      9b74c9897bac770ffc029102a200c5de

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you can use crypto-js javaScript library of crypto standards  there is easiest way to generate sha256 or sha512 const SHA256   require  quot crypto-js sha256 quot    const SHA512   require  quot crypto-js sha512 quot     let password    quot hello quot  let hash 256   SHA256  password  toString    let hash 512   SHA512  password  toString

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Considering the thoughts from http   www thoughtcrime org blog the-cryptographic-doom-principle   in short  FIRST encrypt  THEN authenticate  Afterwards FIRST verify  THEN decrypt  I have implemented the following solution in node js   function encrypt text password     var cipher   crypto createCipher algorithm password    var crypted   cipher update text  utf8   hex     crypted    cipher final  hex      return crypted     function decrypt text password     var decipher   crypto createDecipher algorithm password    var dec   decipher update text  hex   utf8     dec    decipher final  utf8      return dec     function hashText text       var hash   crypto createHash  md5   update text  digest  hex          console log hash        return hash     function encryptThenAuthenticate plainText pw        var encryptedText   encrypt plainText pw       var hash   hashText encryptedText       return encryptedText     hash    function VerifyThenDecrypt encryptedAndAuthenticatedText pw        var encryptedAndHashArray   encryptedAndAuthenticatedText split           var encrypted   encryptedAndHashArray 0       var hash   encryptedAndHashArray 1       var hash2Compare   hashText encrypted       if  hash     hash2Compare                return decrypt encrypted pw              It can be tested with   var doom   encryptThenAuthenticate  The encrypted text  user cryptoPassword   console log VerifyThenDecrypt doom user cryptoPassword      Hope this helps  -

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Even if the hash is not for security  you can use sha instead of md5  In my opinion  the people should forget about md5 for now  it s in the past   The normal nodejs sha256 is deprecated  So  you have two alternatives for now   var shajs   require  sha js    - https   www npmjs com package sha js  used by Browserify   var hash   require  hash js    - https   github com indutny hash js   I prefer using shajs instead of hash  because I consider sha the best hash function nowadays and you don t need a different hash function for now  So to get some hash in hex you should do something like the following    sha256 update  hello   digest  hex

[hash] node.js hash string?

How to get the same hash that Python, PHP, Perl, Github (and prevent an issue) :

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