本文目录一览：
如何使用CryptoJS的AES方法进行加密和解密
首先准备一份明文和秘钥：
var plaintText = 'aaaaaaaaaaaaaaaa'; // 明文
var keyStr = 'bbbbbbbbbbbbbbbb'; // 一般key为一个字符串
参看官网文档，AES方法是支持AES-128、AES-192和AES-256的，加密过程中使用哪种加密方式取决于传入key的类型，否则就会按照AES-256的方式加密。
CryptoJS supports AES-128, AES-192, and AES-256. It will pick the variant by the size of the key you pass in. If you use a passphrase, then it will generate a 256-bit key.
由于Java就是按照128bit给的，但是由于是一个字符串，需要先在前端将其转为128bit的才行。
最开始以为使用CryptoJS.enc.Hex.parse就可以正确地将其转为128bit的key。但是不然...
经过多次尝试，需要使用CryptoJS.enc.Utf8.parse方法才可以将key转为128bit的。好吧，既然说了是多次尝试，那么就不知道原因了，后期再对其进行更深入的研究。
// 字符串类型的key用之前需要用uft8先parse一下才能用
var key = CryptoJS.enc.Utf8.parse(keyStr);
由于后端使用的是PKCS5Padding，但是在使用CryptoJS的时候发现根本没有这个偏移，查询后发现PKCS5Padding和PKCS7Padding是一样的东东，使用时默认就是按照PKCS7Padding进行偏移的。
// 加密
var encryptedData = CryptoJS.AES.encrypt(plaintText, key, {
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.Pkcs7
});
由于CryptoJS生成的密文是一个对象，如果直接将其转为字符串是一个Base64编码过的，在encryptedData.ciphertext上的属性转为字符串才是后端需要的格式。
var encryptedBase64Str = encryptedData.toString();
// 输出：'RJcecVhTqCHHnlibzTypzuDvG8kjWC+ot8JuxWVdLgY='
console.log(encryptedBase64Str);
// 需要读取encryptedData上的ciphertext.toString()才能拿到跟Java一样的密文
var encryptedStr = encryptedData.ciphertext.toString();
// 输出：'44971e715853a821c79e589bcd3ca9cee0ef1bc923582fa8b7c26ec5655d2e06'
console.log(encryptedStr);
由于加密后的密文为128位的字符串，那么解密时，需要将其转为Base64编码的格式。
那么就需要先使用方法CryptoJS.enc.Hex.parse转为十六进制，再使用CryptoJS.enc.Base64.stringify将其变为Base64编码的字符串，此时才可以传入CryptoJS.AES.decrypt方法中对其进行解密。
// 拿到字符串类型的密文需要先将其用Hex方法parse一下
var encryptedHexStr = CryptoJS.enc.Hex.parse(encryptedStr);
// 将密文转为Base64的字符串
// 只有Base64类型的字符串密文才能对其进行解密
var encryptedBase64Str = CryptoJS.enc.Base64.stringify(encryptedHexStr);
使用转为Base64编码后的字符串即可传入CryptoJS.AES.decrypt方法中进行解密操作。
// 解密
var decryptedData = CryptoJS.AES.decrypt(encryptedBase64Str, key, {
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.Pkcs7
});
经过CryptoJS解密后，依然是一个对象，将其变成明文就需要按照Utf8格式转为字符串。
// 解密后，需要按照Utf8的方式将明文转位字符串
var decryptedStr = decryptedData.toString(CryptoJS.enc.Utf8);
console.log(decryptedStr); // 'aaaaaaaaaaaaaaaa'
前端JS AES加密 后端PHP AES加解密
!DOCTYPEhtml
html
head
titleaes demo/title
/head
body
script type="text/javascript" src="./CryptoJS/aes.js"/script
script type="text/javascript" src="./CryptoJS/pad-zeropadding.js"/script
script type="text/javascript"
text = 'did=12345dgversion=1';
var key = '123454536f667445454d537973576562';
key = CryptoJS.enc.Utf8.parse(key);
var iv = "1234577290ABCDEF1264147890ACAE45";
iv = CryptoJS.enc.Utf8.parse(iv);
var encrypted = CryptoJS.AES.encrypt(text, key, {
iv: iv,
mode: CryptoJS.mode.CBC,
padding: CryptoJS.pad.ZeroPadding
}).toString()
document.write(encrypted);
/script
/body
/html
后端
public function encrypt2($input = ''){
$pk = "123454536f667445454d537973576562";
$iv = substr("1234577290ABCDEF1264147890ACAE45", 0, 16);
// $t = 'T10515';
$encrypted = ( mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $pk, $input, MCRYPT_MODE_CBC,$iv) );
return base64_encode($encrypted);
}
public function decrypt2($encrypted){
$pk = "123454536f667445454d537973576562";
$iv = substr("1234577290ABCDEF1264147890ACAE45", 0, 16);
// $t = 'T10515';
// $encrypted = "b7y/JPJFNTfxNVR8H4NNtw==";
return mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $pk, base64_decode($encrypted), MCRYPT_MODE_CBC, $iv);
}
可以推断， js 部分实际只使用了 iv 的 16 位长度
ps：
js加密后默认会base64_encode
使用php解密需要base64_decode后才一致
所以使用js加密和php解密时候需要注意，php端要先base64_decode再解密，例：
js加密的串是$t=b7y/JPJFNTfxNVR8H4NNtw==
php需要
$password= trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $pk,base64_decode( $t), MCRYPT_MODE_CBC, $iv));
则$password才能正确解析出来
需要引入的两个js文件
ase.js
[javascript] view plain copy
/*
CryptoJS v3.1.2
code.google.com/p/crypto-js
(c) 2009-2013 by Jeff Mott. All rights reserved.
code.google.com/p/crypto-js/wiki/License
*/
var CryptoJS=CryptoJS||function(u,p){var d={},l=d.lib={},s=function(){},t=l.Base={extend:function(a){s.prototype=this;var c=new s;ac.mixIn(a);c.hasOwnProperty("init")||(c.init=function(){c.$super.init.apply(this,arguments)});c.init.prototype=c;c.$super=this;return c},create:function(){var a=this.extend();a.init.apply(a,arguments);return a},init:function(){},mixIn:function(a){for(var c in a)a.hasOwnProperty(c)(this[c]=a[c]);a.hasOwnProperty("toString")(this.toString=a.toString)},clone:function(){return this.init.prototype.extend(this)}},
r=l.WordArray=t.extend({init:function(a,c){a=this.words=a||[];this.sigBytes=c!=p?c:4*a.length},toString:function(a){return(a||v).stringify(this)},concat:function(a){var c=this.words,e=a.words,j=this.sigBytes;a=a.sigBytes;this.clamp();if(j%4)for(var k=0;ka;k++)c[j+k2]|=(e[k2]24-8*(k%4)255)24-8*((j+k)%4);else if(65535e.length)for(k=0;ka;k+=4)c[j+k2]=e[k2];else c.push.apply(c,e);this.sigBytes+=a;return this},clamp:function(){var a=this.words,c=this.sigBytes;a[c2]=4294967295
32-8*(c%4);a.length=u.ceil(c/4)},clone:function(){var a=t.clone.call(this);a.words=this.words.slice(0);return a},random:function(a){for(var c=[],e=0;ea;e+=4)c.push(4294967296*u.random()|0);return new r.init(c,a)}}),w=d.enc={},v=w.Hex={stringify:function(a){var c=a.words;a=a.sigBytes;for(var e=[],j=0;ja;j++){var k=c[j2]24-8*(j%4)255;e.push((k4).toString(16));e.push((k15).toString(16))}return e.join("")},parse:function(a){for(var c=a.length,e=[],j=0;jc;j+=2)e[j3]|=parseInt(a.substr(j,
2),16)24-4*(j%8);return new r.init(e,c/2)}},b=w.Latin1={stringify:function(a){var c=a.words;a=a.sigBytes;for(var e=[],j=0;ja;j++)e.push(String.fromCharCode(c[j2]24-8*(j%4)255));return e.join("")},parse:function(a){for(var c=a.length,e=[],j=0;jc;j++)e[j2]|=(a.charCodeAt(j)255)24-8*(j%4);return new r.init(e,c)}},x=w.Utf8={stringify:function(a){try{return decodeURIComponent(escape(b.stringify(a)))}catch(c){throw Error("Malformed UTF-8 data");}},parse:function(a){return b.parse(unescape(encodeURIComponent(a)))}},
q=l.BufferedBlockAlgorithm=t.extend({reset:function(){this._data=new r.init;this._nDataBytes=0},_append:function(a){"string"==typeof a(a=x.parse(a));this._data.concat(a);this._nDataBytes+=a.sigBytes},_process:function(a){var c=this._data,e=c.words,j=c.sigBytes,k=this.blockSize,b=j/(4*k),b=a?u.ceil(b):u.max((b|0)-this._minBufferSize,0);a=b*k;j=u.min(4*a,j);if(a){for(var q=0;qa;q+=k)this._doProcessBlock(e,q);q=e.splice(0,a);c.sigBytes-=j}return new r.init(q,j)},clone:function(){var a=t.clone.call(this);
a._data=this._data.clone();return a},_minBufferSize:0});l.Hasher=q.extend({cfg:t.extend(),init:function(a){this.cfg=this.cfg.extend(a);this.reset()},reset:function(){q.reset.call(this);this._doReset()},update:function(a){this._append(a);this._process();return this},finalize:function(a){athis._append(a);return this._doFinalize()},blockSize:16,_createHelper:function(a){return function(b,e){return(new a.init(e)).finalize(b)}},_createHmacHelper:function(a){return function(b,e){return(new n.HMAC.init(a,
e)).finalize(b)}}});var n=d.algo={};return d}(Math);
(function(){var u=CryptoJS,p=u.lib.WordArray;u.enc.Base64={stringify:function(d){var l=d.words,p=d.sigBytes,t=this._map;d.clamp();d=[];for(var r=0;rp;r+=3)for(var w=(l[r2]24-8*(r%4)255)16|(l[r+12]24-8*((r+1)%4)255)8|l[r+22]24-8*((r+2)%4)255,v=0;4vr+0.75*vp;v++)d.push(t.charAt(w6*(3-v)63));if(l=t.charAt(64))for(;d.length%4;)d.push(l);return d.join("")},parse:function(d){var l=d.length,s=this._map,t=s.charAt(64);t(t=d.indexOf(t),-1!=t(l=t));for(var t=[],r=0,w=0;w
l;w++)if(w%4){var v=s.indexOf(d.charAt(w-1))2*(w%4),b=s.indexOf(d.charAt(w))6-2*(w%4);t[r2]|=(v|b)24-8*(r%4);r++}return p.create(t,r)},_map:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="}})();
(function(u){function p(b,n,a,c,e,j,k){b=b+(na|~nc)+e+k;return(bj|b32-j)+n}function d(b,n,a,c,e,j,k){b=b+(nc|a~c)+e+k;return(bj|b32-j)+n}function l(b,n,a,c,e,j,k){b=b+(n^a^c)+e+k;return(bj|b32-j)+n}function s(b,n,a,c,e,j,k){b=b+(a^(n|~c))+e+k;return(bj|b32-j)+n}for(var t=CryptoJS,r=t.lib,w=r.WordArray,v=r.Hasher,r=t.algo,b=[],x=0;64x;x++)b[x]=4294967296*u.abs(u.sin(x+1))|0;r=r.MD5=v.extend({_doReset:function(){this._hash=new w.init([1732584193,4023233417,2562383102,271733878])},
_doProcessBlock:function(q,n){for(var a=0;16a;a++){var c=n+a,e=q[c];q[c]=(e8|e24)16711935|(e24|e8)4278255360}var a=this._hash.words,c=q[n+0],e=q[n+1],j=q[n+2],k=q[n+3],z=q[n+4],r=q[n+5],t=q[n+6],w=q[n+7],v=q[n+8],A=q[n+9],B=q[n+10],C=q[n+11],u=q[n+12],D=q[n+13],E=q[n+14],x=q[n+15],f=a[0],m=a[1],g=a[2],h=a[3],f=p(f,m,g,h,c,7,b[0]),h=p(h,f,m,g,e,12,b[1]),g=p(g,h,f,m,j,17,b[2]),m=p(m,g,h,f,k,22,b[3]),f=p(f,m,g,h,z,7,b[4]),h=p(h,f,m,g,r,12,b[5]),g=p(g,h,f,m,t,17,b[6]),m=p(m,g,h,f,w,22,b[7]),
f=p(f,m,g,h,v,7,b[8]),h=p(h,f,m,g,A,12,b[9]),g=p(g,h,f,m,B,17,b[10]),m=p(m,g,h,f,C,22,b[11]),f=p(f,m,g,h,u,7,b[12]),h=p(h,f,m,g,D,12,b[13]),g=p(g,h,f,m,E,17,b[14]),m=p(m,g,h,f,x,22,b[15]),f=d(f,m,g,h,e,5,b[16]),h=d(h,f,m,g,t,9,b[17]),g=d(g,h,f,m,C,14,b[18]),m=d(m,g,h,f,c,20,b[19]),f=d(f,m,g,h,r,5,b[20]),h=d(h,f,m,g,B,9,b[21]),g=d(g,h,f,m,x,14,b[22]),m=d(m,g,h,f,z,20,b[23]),f=d(f,m,g,h,A,5,b[24]),h=d(h,f,m,g,E,9,b[25]),g=d(g,h,f,m,k,14,b[26]),m=d(m,g,h,f,v,20,b[27]),f=d(f,m,g,h,D,5,b[28]),h=d(h,f,
m,g,j,9,b[29]),g=d(g,h,f,m,w,14,b[30]),m=d(m,g,h,f,u,20,b[31]),f=l(f,m,g,h,r,4,b[32]),h=l(h,f,m,g,v,11,b[33]),g=l(g,h,f,m,C,16,b[34]),m=l(m,g,h,f,E,23,b[35]),f=l(f,m,g,h,e,4,b[36]),h=l(h,f,m,g,z,11,b[37]),g=l(g,h,f,m,w,16,b[38]),m=l(m,g,h,f,B,23,b[39]),f=l(f,m,g,h,D,4,b[40]),h=l(h,f,m,g,c,11,b[41]),g=l(g,h,f,m,k,16,b[42]),m=l(m,g,h,f,t,23,b[43]),f=l(f,m,g,h,A,4,b[44]),h=l(h,f,m,g,u,11,b[45]),g=l(g,h,f,m,x,16,b[46]),m=l(m,g,h,f,j,23,b[47]),f=s(f,m,g,h,c,6,b[48]),h=s(h,f,m,g,w,10,b[49]),g=s(g,h,f,m,
E,15,b[50]),m=s(m,g,h,f,r,21,b[51]),f=s(f,m,g,h,u,6,b[52]),h=s(h,f,m,g,k,10,b[53]),g=s(g,h,f,m,B,15,b[54]),m=s(m,g,h,f,e,21,b[55]),f=s(f,m,g,h,v,6,b[56]),h=s(h,f,m,g,x,10,b[57]),g=s(g,h,f,m,t,15,b[58]),m=s(m,g,h,f,D,21,b[59]),f=s(f,m,g,h,z,6,b[60]),h=s(h,f,m,g,C,10,b[61]),g=s(g,h,f,m,j,15,b[62]),m=s(m,g,h,f,A,21,b[63]);a[0]=a[0]+f|0;a[1]=a[1]+m|0;a[2]=a[2]+g|0;a[3]=a[3]+h|0},_doFinalize:function(){var b=this._data,n=b.words,a=8*this._nDataBytes,c=8*b.sigBytes;n[c5]|=12824-c%32;var e=u.floor(a/
4294967296);n[(c+6494)+15]=(e8|e24)16711935|(e24|e8)4278255360;n[(c+6494)+14]=(a8|a24)16711935|(a24|a8)4278255360;b.sigBytes=4*(n.length+1);this._process();b=this._hash;n=b.words;for(a=0;4a;a++)c=n[a],n[a]=(c8|c24)16711935|(c24|c8)4278255360;return b},clone:function(){var b=v.clone.call(this);b._hash=this._hash.clone();return b}});t.MD5=v._createHelper(r);t.HmacMD5=v._createHmacHelper(r)})(Math);
(function(){var u=CryptoJS,p=u.lib,d=p.Base,l=p.WordArray,p=u.algo,s=p.EvpKDF=d.extend({cfg:d.extend({keySize:4,hasher:p.MD5,iterations:1}),init:function(d){this.cfg=this.cfg.extend(d)},compute:function(d,r){for(var p=this.cfg,s=p.hasher.create(),b=l.create(),u=b.words,q=p.keySize,p=p.iterations;u.lengthq;){ns.update(n);var n=s.update(d).finalize(r);s.reset();for(var a=1;ap;a++)n=s.finalize(n),s.reset();b.concat(n)}b.sigBytes=4*q;return b}});u.EvpKDF=function(d,l,p){return s.create(p).compute(d,
l)}})();
CryptoJS.lib.Cipher||function(u){var p=CryptoJS,d=p.lib,l=d.Base,s=d.WordArray,t=d.BufferedBlockAlgorithm,r=p.enc.Base64,w=p.algo.EvpKDF,v=d.Cipher=t.extend({cfg:l.extend(),createEncryptor:function(e,a){return this.create(this._ENC_XFORM_MODE,e,a)},createDecryptor:function(e,a){return this.create(this._DEC_XFORM_MODE,e,a)},init:function(e,a,b){this.cfg=this.cfg.extend(b);this._xformMode=e;this._key=a;this.reset()},reset:function(){t.reset.call(this);this._doReset()},process:function(e){this._append(e);return this._process()},
finalize:function(e){ethis._append(e);return this._doFinalize()},keySize:4,ivSize:4,_ENC_XFORM_MODE:1,_DEC_XFORM_MODE:2,_createHelper:function(e){return{encrypt:function(b,k,d){return("string"==typeof k?c:a).encrypt(e,b,k,d)},decrypt:function(b,k,d){return("string"==typeof k?c:a).decrypt(e,b,k,d)}}}});d.StreamCipher=v.extend({_doFinalize:function(){return this._process(!0)},blockSize:1});var b=p.mode={},x=function(e,a,b){var c=this._iv;c?this._iv=u:c=this._prevBlock;for(var d=0;db;d++)e[a+d]^=
c[d]},q=(d.BlockCipherMode=l.extend({createEncryptor:function(e,a){return this.Encryptor.create(e,a)},createDecryptor:function(e,a){return this.Decryptor.create(e,a)},init:function(e,a){this._cipher=e;this._iv=a}})).extend();q.Encryptor=q.extend({processBlock:function(e,a){var b=this._cipher,c=b.blockSize;x.call(this,e,a,c);b.encryptBlock(e,a);this._prevBlock=e.slice(a,a+c)}});q.Decryptor=q.extend({processBlock:function(e,a){var b=this._cipher,c=b.blockSize,d=e.slice(a,a+c);b.decryptBlock(e,a);x.call(this,
e,a,c);this._prevBlock=d}});b=b.CBC=q;q=(p.pad={}).Pkcs7={pad:function(a,b){for(var c=4*b,c=c-a.sigBytes%c,d=c24|c16|c8|c,l=[],n=0;nc;n+=4)l.push(d);c=s.create(l,c);a.concat(c)},unpad:function(a){a.sigBytes-=a.words[a.sigBytes-12]255}};d.BlockCipher=v.extend({cfg:v.cfg.extend({mode:b,padding:q}),reset:function(){v.reset.call(this);var a=this.cfg,b=a.iv,a=a.mode;if(this._xformMode==this._ENC_XFORM_MODE)var c=a.createEncryptor;else c=a.createDecryptor,this._minBufferSize=1;this._mode=c.call(a,
this,bb.words)},_doProcessBlock:function(a,b){this._mode.processBlock(a,b)},_doFinalize:function(){var a=this.cfg.padding;if(this._xformMode==this._ENC_XFORM_MODE){a.pad(this._data,this.blockSize);var b=this._process(!0)}else b=this._process(!0),a.unpad(b);return b},blockSize:4});var n=d.CipherParams=l.extend({init:function(a){this.mixIn(a)},toString:function(a){return(a||this.formatter).stringify(this)}}),b=(p.format={}).OpenSSL={stringify:function(a){var b=a.ciphertext;a=a.salt;return(a?s.create([1398893684,
1701076831]).concat(a).concat(b):b).toString(r)},parse:function(a){a=r.parse(a);var b=a.words;if(1398893684==b[0]1701076831==b[1]){var c=s.create(b.slice(2,4));b.splice(0,4);a.sigBytes-=16}return n.create({ciphertext:a,salt:c})}},a=d.SerializableCipher=l.extend({cfg:l.extend({format:b}),encrypt:function(a,b,c,d){d=this.cfg.extend(d);var l=a.createEncryptor(c,d);b=l.finalize(b);l=l.cfg;return n.create({ciphertext:b,key:c,iv:l.iv,algorithm:a,mode:l.mode,padding:l.padding,blockSize:a.blockSize,formatter:d.format})},
decrypt:function(a,b,c,d){d=this.cfg.extend(d);b=this._parse(b,d.format);return a.createDecryptor(c,d).finalize(b.ciphertext)},_parse:function(a,b){return"string"==typeof a?b.parse(a,this):a}}),p=(p.kdf={}).OpenSSL={execute:function(a,b,c,d){d||(d=s.random(8));a=w.create({keySize:b+c}).compute(a,d);c=s.create(a.words.slice(b),4*c);a.sigBytes=4*b;return n.create({key:a,iv:c,salt:d})}},c=d.PasswordBasedCipher=a.extend({cfg:a.cfg.extend({kdf:p}),encrypt:function(b,c,d,l){l=this.cfg.extend(l);d=l.kdf.execute(d,
b.keySize,b.ivSize);l.iv=d.iv;b=a.encrypt.call(this,b,c,d.key,l);b.mixIn(d);return b},decrypt:function(b,c,d,l){l=this.cfg.extend(l);c=this._parse(c,l.format);d=l.kdf.execute(d,b.keySize,b.ivSize,c.salt);l.iv=d.iv;return a.decrypt.call(this,b,c,d.key,l)}})}();
(function(){for(var u=CryptoJS,p=u.lib.BlockCipher,d=u.algo,l=[],s=[],t=[],r=[],w=[],v=[],b=[],x=[],q=[],n=[],a=[],c=0;256c;c++)a[c]=128c?c1:c1^283;for(var e=0,j=0,c=0;256c;c++){var k=j^j1^j2^j3^j4,k=k8^k255^99;l[e]=k;s[k]=e;var z=a[e],F=a[z],G=a[F],y=257*a[k]^16843008*k;t[e]=y24|y8;r[e]=y16|y16;w[e]=y8|y24;v[e]=y;y=16843009*G^65537*F^257*z^16843008*e;b[k]=y24|y8;x[k]=y16|y16;q[k]=y8|y24;n[k]=y;e?(e=z^a[a[a[G^z]]],j^=a[a[j]]):e=j=1}var H=[0,1,2,4,8,
16,32,64,128,27,54],d=d.AES=p.extend({_doReset:function(){for(var a=this._key,c=a.words,d=a.sigBytes/4,a=4*((this._nRounds=d+6)+1),e=this._keySchedule=[],j=0;ja;j++)if(jd)e[j]=c[j];else{var k=e[j-1];j%d?6d4==j%d(k=l[k24]24|l[k16255]16|l[k8255]8|l[k255]):(k=k8|k24,k=l[k24]24|l[k16255]16|l[k8255]8|l[k255],k^=H[j/d|0]24);e[j]=e[j-d]^k}c=this._invKeySchedule=[];for(d=0;da;d++)j=a-d,k=d%4?e[j]:e[j-4],c[d]=4d||4=j?k:b[l[k24]]^x[l[k16255]]^q[l[k
8255]]^n[l[k255]]},encryptBlock:function(a,b){this._doCryptBlock(a,b,this._keySchedule,t,r,w,v,l)},decryptBlock:function(a,c){var d=a[c+1];a[c+1]=a[c+3];a[c+3]=d;this._doCryptBlock(a,c,this._invKeySchedule,b,x,q,n,s);d=a[c+1];a[c+1]=a[c+3];a[c+3]=d},_doCryptBlock:function(a,b,c,d,e,j,l,f){for(var m=this._nRounds,g=a[b]^c[0],h=a[b+1]^c[1],k=a[b+2]^c[2],n=a[b+3]^c[3],p=4,r=1;rm;r++)var q=d[g24]^e[h16255]^j[k8255]^l[n255]^c[p++],s=d[h24]^e[k16255]^j[n8255]^l[g255]^c[p++],t=
d[k24]^e[n16255]^j[g8255]^l[h255]^c[p++],n=d[n24]^e[g16255]^j[h8255]^l[k255]^c[p++],g=q,h=s,k=t;q=(f[g24]24|f[h16255]16|f[k8255]8|f[n255])^c[p++];s=(f[h24]24|f[k16255]16|f[n8255]8|f[g255])^c[p++];t=(f[k24]24|f[n16255]16|f[g8255]8|f[h255])^c[p++];n=(f[n24]24|f[g16255]16|f[h8255]8|f[k255])^c[p++];a[b]=q;a[b+1]=s;a[b+2]=t;a[b+3]=n},keySize:8});u.AES=p._createHelper(d)})();
pad-zeropadding.js
/*
CryptoJS v3.1.2
code.google.com/p/crypto-js
(c) 2009-2013 by Jeff Mott. All rights reserved.
code.google.com/p/crypto-js/wiki/License
*/
/**
* Zero padding strategy.
*/
CryptoJS.pad.ZeroPadding = {
pad: function (data, blockSize) {
// Shortcut
var blockSizeBytes = blockSize * 4;
// Pad
data.clamp();
data.sigBytes += blockSizeBytes - ((data.sigBytes % blockSizeBytes) || blockSizeBytes);
},
unpad: function (data) {
// Shortcut
var dataWords = data.words;
// Unpad
var i = data.sigBytes - 1;
while (!((dataWords[i 2] (24 - (i % 4) * 8)) 0xff)) {
i--;
}
data.sigBytes = i + 1;
}
};
为什么 CryptoJS DES 加密的结果和 Java DES 不一样
最近需要对数据进行加密/解密, 因此选用了CryptoJS库, 对数据做DES算法的加密/解密
首选查看官方示例, 将密文进行Base64编码, 掉进一个大坑
script src="htt p:/ /crypto-js.googlecod e.c om/svn/tags/3.1.2/build/rollups/tripledes.js"/script
script
var encrypted = CryptoJS.DES.encrypt("Message", "Secret Passphrase");
// ciphertext changed every time you run it
// 加密的结果不应该每次都是一样的吗?
console.log(encrypted.toString(), encrypted.ciphertext.toString(CryptoJS.enc.Base64));
var decrypted = CryptoJS.DES.decrypt(encrypted, "Secret Passphrase");
console.log(decrypted.toString(CryptoJS.enc.Utf8));
/script
对这些加密算法不了解, 只能求助Google
des encrypion: js encrypted value does not match the java encrypted value
In cryptoJS you have to convert the key to hex and useit as word just like above (otherwise it will be considered as passphrase)
For the key, when you pass a string, it's treated as a passphrase and used to derive an actual key and IV. Or you can pass a WordArray that represents the actual key.
原来是我指定key的方式不对, 直接将字符串做为参数, 想当然的以为这就是key, 其实不然, CryptoJS会根据这个字符串算出真正的key和IV(各种新鲜名词不解释, 问我也没用, 我也不懂 -_-")
那么我们只需要将key和iv对应的字符串转成CryptoJS的WordArray类型, 在DES加密时做为参数传入即可, 这样对Message这个字符串加密, 每次得到的密文都是YOa3le0I+dI=
var keyHex = CryptoJS.enc.Utf8.parse('abcd1234');
var ivHex = CryptoJS.enc.Utf8.parse('inputvec');
var encrypted = CryptoJS.DES.encrypt('Message', keyHex, { iv: ivHex });
这样是不是就万事OK了? 哪有, 谁知道这坑是一个接一个啊.
我们再试试Java这边的DES加密是不是和这个结果一样, 具体实现请参考Simple Java Class to DES Encrypt Strings
果真掉坑里了, Java通过DES加密Message这个字符串得到的结果是8dKft9vkZ4I=和CryptoJS算出来的不一样啊...亲
继续求助Google
C# and Java DES Encryption value are not identical
SunJCE provider uses ECB as the default mode, and PKCS5Padding as the default padding scheme for DES.(JCA Doc)
This means that in the case of the SunJCE provider,
Cipher c1 = Cipher.getInstance("DES/ECB/PKCS5Padding");
and
Cipher c1 = Cipher.getInstance("DES");
are equivalent statements.
原来是CryptoJS进行DES加密时, 默认的模式和padding方式和Java默认的不一样造成的, 必须使用ECB mode和PKCS5Padding, 但是CryptoJS中只有Pkcs7, 不管了, 试试看...
script src="htt p:/ /crypto-js.googleco de.c om/svn/tags/3.1.2/build/rollups/tripledes.js"/script
script src="ht tp:/ /crypto-js.googleco de.c om/svn/tags/3.1.2/build/components/mode-ecb.js"/script
script
var keyHex = CryptoJS.enc.Utf8.parse('abcd1234');
var encrypted = CryptoJS.DES.encrypt('Message', keyHex, {
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.Pkcs7
});
console.log(encrypted.toString(), encrypted.ciphertext.toString(CryptoJS.enc.Base64));
/script
咦...使用Pkcs7能得到和Java DES一样的结果了, 哇塞...好神奇
那我们试试统一Java也改成Cipher.getInstance("DES/ECB/PKCS7Padding")试试, 结果得到一个大大的错误
Error:java.security.NoSuchAlgorithmException: Cannot find any provider supporting DES/ECB/PKCS7Padding
没办法, 继续Google
java.security.NoSuchAlgorithmException: Cannot find any provider supporting AES/ECB/PKCS7PADDING
I will point out that PKCS#5 and PKCS#7 actually specify exactly the same type of padding (they are the same!), but it's called #5 when used in this context. :)
这位大侠给出的解释是: PKCS#5和PKCS#7是一样的padding方式, 对加密算法一知半解, 我也只能暂且认可这个解释了.
忙完了DES的加密, 接下来就是使用CryptoJS来解密了. 我们需要直接解密DES加密后的base64密文字符串. CryptoJS好像没有提供直接解密DES密文字符串的方法啊, 他的整个加密/解密过程都是内部自己在玩, 解密时需要用到加密的结果对象, 这不是坑我吗?
只好研究下CryptoJS DES加密后返回的对象, 发现有一个属性ciphertext, 就是密文的WordArray, 那么解密的时候, 我们是不是只要提供这个就行了呢?
var keyHex = CryptoJS.enc.Utf8.parse('abcd1234');
// direct decrypt ciphertext
var decrypted = CryptoJS.DES.decrypt({
ciphertext: CryptoJS.enc.Base64.parse('8dKft9vkZ4I=')
}, keyHex, {
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.Pkcs7
});
console.log(decrypted.toString(CryptoJS.enc.Utf8));
果不其然, 到此为止, 问题全部解决, 豁然开朗...
完整代码请参考CryptoJS-DES.html
Use CryptoJS encrypt message by DES and direct decrypt ciphertext, compatible with Java Cipher.getInstance("DES")
