在一次項目實戰中，前端登錄使用了RSA加密，使用LoadRunner壓測的第一步，就是模擬用戶登錄，可惜loadRunner11并不能錄制前端的加密過程，并且安裝的LR是基于C語言版，網絡上關于RSA的加密更多的是Java版，最后，選擇在Jmeter中先嘗試一下能否解決加密的問題，畢竟它有很多處理器，用于腳本的插入；

　　把解決過程中遇到的問題，簡單做個記錄，防止遺忘，也算是給自己下一次項目一個經驗總結了；

【1】了解加密方式-----RSA

　　詢問開發前端的加密方式：先請求public_key，再加密密碼，再提交。

　　加密的代碼前端代碼實現：

　　$.getJSON('/public_key?t='+timestamp).then((rsa) => {

??????????　　 ?let rsaKey = new RSAKey();

?????????? 　　?rsaKey.setPublic(b64tohex(rsa.modulus), b64tohex(rsa.exponent));

???????????　　 data.password = hex2b64(rsaKey.encrypt(data.password));

??????????　　? $.post('/ajax_login_check', data).then(this.completed, this.failed);

??? 　　}, this.failed);

　　備注：以上來自開發，后來在了解RSA的實現方式中，發現大家的RSA前端加密方式是一樣的~

　　已知了上面這些，下面開始自己玩前端RSA加密的方式，抓包查看登錄的請求，有三個重要的請求：

　?、貵ET /public_key?t=1495537754854 ：用于獲取RAS生成公鑰時的兩個重要參數exponent 和 modulus；

　　②POST /ajax_login_check：用于將已加密的密碼 && 登錄名post到服務器去驗證，驗證成功后返回success；

　　③GET /：在 /ajax_login_check驗證成功后，GET /請求會返回一個TOKEN值，作為該用戶進入系統后的令牌，執行系統內的每一個操作時，對應的請求都需要在頭部添加該參數，否則會報403錯誤；

【2】查找加密使用的js文件

　　也是走了很多彎路，先在DOS下折騰，后又安裝了eclipse，在網上找尋各種加密代碼，打成jar包，在LoadRunner中卻無法使用；將網上關于RSA的java類及方法直接放在Jmeter中進行加密，Jmeter連import都不支持；

　　然后，仔細查看登錄的每一個請求包，注意到一個js文件，其中有關于BigInteger和RSA的函數定義(C語言中是這樣稱呼的，我也這樣稱呼了)，想一想既然是在前端加密，那服務器會不會直接將加密使用的方法返回給客戶端呢，谷歌瀏覽器按“F12”查看登錄頁面的Sources，查找js文件，后來發現前面提到的js文件sec.min.js中竟然有開發用于加密的函數hex2b64()，急忙將該js文件保存在本地，開發使用到的加密的方法都可以在這個文件中找到，喜極而泣；

【3】使用Jmeter的JSR223后置處理器，完成加密

　　使用apache-jmeter-2.12 + jdk 1.6，在JSR223中load("sec.min.js");，總是報錯“jmeter.modifiers.JSR223PreProcessor: Problem in JSR223 script JSR223 PreProcessor javax.script.ScriptException: sun.org.mozilla.javascript.internal.EcmaError: ReferenceError: "load" is not defined.”，后考慮是不是版本問題，換了apache-jmeter-3.2 + jdk1.8，load不再報錯；

　　注：①使用到的js文件需要放在jmeter的bin目錄下；②JSR223中，Language選擇“JavaScript”；

　　Jmeter中加密的調用實現如下：

　　JSR223中使用到的modules的正則表達式提取如下：

?

【4】調試js文件

　　勾選Jmeter“選項”→“Log Viewer”，添加Debug后置處理器；在Jmeter中會打印代碼執行的情況，有錯誤的話就逐步排除；PS：調試很艱難，且調且珍惜；

　?、賜avigator? 報錯，求助網絡，這是瀏覽器對象，因為錄制時使用的谷歌瀏覽器，所以我選擇了保留關于谷歌的設置（其實不一定要選擇谷歌相關的，只要js文件中使用同一瀏覽器的相關屬性值即可），將不重要的直接可以注釋掉，類似的還有 window；

　　?

?　

　?、赼lert()在Jmeter中無法執行(會報錯)：直接將js中的alert()注釋，并用return null; 替換，便于調試；

　　③我在調試過程中還遇到 toRadix & signum &? chunkSize & intValue未定義；繼續使用F12查看自己是否有遺漏需要load的js文件，并沒有找到，然后在網上搜索? toRadix 直接就出來了，O(∩_∩)O~~，于是添加屬性及方法在js文件中，正確執行，耶耶耶~~~~鏈接：http://blog.csdn.net/huaye2007/article/details/41727921

【4】后續處理

　?、貵ET /public_key?t=1495537754854這里的t是Unix時間戳，在該請求中添加 JSR223前置處理器，使用如下語句完成處理：

　　var timestamp=new Date().getTime();?? //精確到毫秒；

　　vars.put("timestamp",timestamp);

　?、谝琅f顯示密碼錯誤：一步步排查，注意到在POST時，“查看結果樹”的“請求”中顯示的內容與log中打印的不一致（密文為base64編碼），具體為“+”顯示不正確，再次詢問網絡，有人提到含有“+”的字符串在URL中傳遞時，需要替換加號為%2B，否則在服務器解碼的時候會出錯；

　　后來勾選了 /ajax_login_check請求對應的參數“password”值的“編碼”，在該請求的結果樹中，可以看到POST的密文已經將“+”及“/”進行了轉碼，因此最終并未使用替換語句；

　　附上替換語句：data = data.replace(/\+/g,"%2B");????? data = data.replace(/\//g,"%2F");?? // \g代表全部替換

　　至此，完成了前端模擬RSA加密，進行登錄，ajax校驗用戶名&密碼通過；

　　總結及感悟：對于前端加密，服務器應該是要返回加密方式給客戶端的，否則客戶端無從知曉如何加密，至于加密的方式是否可以直接識別，1在于服務端的返回內容，2在于測試人員是否有很好的觀察及辨識能力，而這種辨識能力就在于平時的多涉獵多接觸，一開始抓包也有看到sec.min.js，但是并沒有敏銳的意識到加密就藏在這里，兜兜轉轉才發現，所以還是要多學習，開發知識也好，測試知識也罷O(∩_∩)O~~

　　附1----------Jmeter中JSR前置處理器的javascript腳本

?

load("sec.min.js");var modulus = vars.get("modulus"); log.info(modulus); var exponent = vars.get("exponent"); log.info(exponent); function RSA(){var rsaKey = new RSAKey(); rsaKey.setPublic(b64tohex("${modulus}"),b64tohex("${exponent}")); var Enpassword = hex2b64(rsaKey.encrypt("${password}"));return Enpassword }var data = RSA();log.info(data);//base64在url中的傳輸，要注意+ /兩個符號//data = data.replace(/\+/g,"%2B"); //data = data.replace(/\//g,"%2F");vars.put("Password",data); View Code var dbits; var canary = 244837814094590; var j_lm = ((canary & 16777215) == 15715070); function BigInteger(e, d, f) {if (e != null) {if ("number" == typeof e) {this.fromNumber(e, d, f)} else {if (d == null && "string" != typeof e) {this.fromString(e, 256)} else {this.fromString(e, d)}}} } function nbi() {return new BigInteger(null) } function am1(f, a, b, e, h, g) {while (--g >= 0) {var d = a * this[f++] + b[e] + h;h = Math.floor(d / 67108864);b[e++] = d & 67108863}return h } function am2(f, q, r, e, o, a) {var k = q & 32767,p = q >> 15;while (--a >= 0) {var d = this[f] & 32767;var g = this[f++] >> 15;var b = p * d + g * k;d = k * d + ((b & 32767) << 15) + r[e] + (o & 1073741823);o = (d >>> 30) + (b >>> 15) + p * g + (o >>> 30);r[e++] = d & 1073741823}return o } function am3(f, q, r, e, o, a) {var k = q & 16383,p = q >> 14;while (--a >= 0) {var d = this[f] & 16383;var g = this[f++] >> 14;var b = p * d + g * k;d = k * d + ((b & 16383) << 14) + r[e] + o;o = (d >> 28) + (b >> 14) + p * g;r[e++] = d & 268435455}return o } //if (j_lm && (navigator.appName == "Microsoft Internet Explorer")) { //xpp注釋 // BigInteger.prototype.am = am2; // dbits = 30 //} else { // if (j_lm && (navigator.appName != "Netscape")) { // BigInteger.prototype.am = am1; // dbits = 26 // } else {BigInteger.prototype.am = am3;dbits = 28 // } //} BigInteger.prototype.DB = dbits; BigInteger.prototype.DM = ((1 << dbits) - 1); BigInteger.prototype.DV = (1 << dbits); var BI_FP = 52; BigInteger.prototype.FV = Math.pow(2, BI_FP); BigInteger.prototype.F1 = BI_FP - dbits; BigInteger.prototype.F2 = 2 * dbits - BI_FP; var BI_RM = "0123456789abcdefghijklmnopqrstuvwxyz"; var BI_RC = new Array(); var rr, vv; rr = "0".charCodeAt(0); for (vv = 0; vv <= 9; ++vv) {BI_RC[rr++] = vv } rr = "a".charCodeAt(0); for (vv = 10; vv < 36; ++vv) {BI_RC[rr++] = vv } rr = "A".charCodeAt(0); for (vv = 10; vv < 36; ++vv) {BI_RC[rr++] = vv } function int2char(a) {return BI_RM.charAt(a) } function intAt(b, a) {var d = BI_RC[b.charCodeAt(a)];return (d == null) ? -1 : d } //-----摘自網絡-----start function bnpToRadix(b) { if (b == null) { b = 10 } if (this.signum() == 0 || b < 2 || b > 36) { return "0" } var cs = this.chunkSize(b); var a = Math.pow(b, cs); var d = nbv(a), y = nbi(), z = nbi(), r = ""; this.divRemTo(d, y, z); while (y.signum() > 0) { r = (a + z.intValue()).toString(b).substr(1) + r; y.divRemTo(d, y, z) } return z.intValue().toString(b) + r } function bnSigNum() { if (this.s < 0) { return -1 } else { if (this.t <= 0 || (this.t == 1 && this[0] <= 0)) { return 0 } else { return 1 } } } function bnpChunkSize(r) { return Math.floor(Math.LN2 * this.DB / Math.log(r)) } function bnIntValue() { if (this.s < 0) { if (this.t == 1) { return this[0] - this.DV } else { if (this.t == 0) { return -1 } } } else { if (this.t == 1) { return this[0] } else { if (this.t == 0) { return 0 } } } return ((this[1] & ((1 << (32 - this.DB)) - 1)) << this.DB) | this[0] } //-----摘自網絡-----endfunction bnpCopyTo(b) {for (var a = this.t - 1; a >= 0; --a) {b[a] = this[a]}b.t = this.t;b.s = this.s } function bnpFromInt(a) {this.t = 1;this.s = (a < 0) ? -1 : 0;if (a > 0) {this[0] = a} else {if (a < -1) {this[0] = a + DV} else {this.t = 0}} } function nbv(a) {var b = nbi();b.fromInt(a);return b } function bnpFromString(h, c) {var e;if (c == 16) {e = 4} else {if (c == 8) {e = 3} else {if (c == 256) {e = 8} else {if (c == 2) {e = 1} else {if (c == 32) {e = 5} else {if (c == 4) {e = 2} else {this.fromRadix(h, c);return}}}}}}this.t = 0;this.s = 0;var g = h.length,d = false,f = 0;while (--g >= 0) {var a = (e == 8) ? h[g] & 255 : intAt(h, g);if (a < 0) {if (h.charAt(g) == "-") {d = true}continue}d = false;if (f == 0) {this[this.t++] = a} else {if (f + e > this.DB) {this[this.t - 1] |= (a & ((1 << (this.DB - f)) - 1)) << f;this[this.t++] = (a >> (this.DB - f))} else {this[this.t - 1] |= a << f}}f += e;if (f >= this.DB) {f -= this.DB}}if (e == 8 && (h[0] & 128) != 0) {this.s = -1;if (f > 0) {this[this.t - 1] |= ((1 << (this.DB - f)) - 1) << f}}this.clamp();if (d) {BigInteger.ZERO.subTo(this, this)} } function bnpClamp() {var a = this.s & this.DM;while (this.t > 0 && this[this.t - 1] == a) {--this.t} } function bnToString(c) {if (this.s < 0) {return "-" + this.negate().toString(c)}var e;if (c == 16) {e = 4} else {if (c == 8) {e = 3} else {if (c == 2) {e = 1} else {if (c == 32) {e = 5} else {if (c == 4) {e = 2} else {return this.toRadix(c)}}}}}var g = (1 << e) - 1,l,a = false,h = "",f = this.t;var j = this.DB - (f * this.DB) % e;if (f-- > 0) {if (j < this.DB && (l = this[f] >> j) > 0) {a = true;h = int2char(l)}while (f >= 0) {if (j < e) {l = (this[f] & ((1 << j) - 1)) << (e - j);l |= this[--f] >> (j += this.DB - e)} else {l = (this[f] >> (j -= e)) & g;if (j <= 0) {j += this.DB;--f}}if (l > 0) {a = true}if (a) {h += int2char(l)}}}return a ? h : "0" } function bnNegate() {var a = nbi();BigInteger.ZERO.subTo(this, a);return a } function bnAbs() {return (this.s < 0) ? this.negate() : this } function bnCompareTo(b) {var d = this.s - b.s;if (d != 0) {return d}var c = this.t;d = c - b.t;if (d != 0) {return (this.s < 0) ? -d : d}while (--c >= 0) {if ((d = this[c] - b[c]) != 0) {return d}}return 0 } function nbits(a) {var c = 1,b;if ((b = a >>> 16) != 0) {a = b;c += 16}if ((b = a >> 8) != 0) {a = b;c += 8}if ((b = a >> 4) != 0) {a = b;c += 4}if ((b = a >> 2) != 0) {a = b;c += 2}if ((b = a >> 1) != 0) {a = b;c += 1}return c } function bnBitLength() {if (this.t <= 0) {return 0}return this.DB * (this.t - 1) + nbits(this[this.t - 1] ^ (this.s & this.DM)) }function bnpDLShiftTo(c, b) {var a;for (a = this.t - 1; a >= 0; --a) {b[a + c] = this[a]}for (a = c - 1; a >= 0; --a) {b[a] = 0}b.t = this.t + c;b.s = this.s } function bnpDRShiftTo(c, b) {for (var a = c; a < this.t; ++a) {b[a - c] = this[a]}b.t = Math.max(this.t - c, 0);b.s = this.s } function bnpLShiftTo(j, e) {var b = j % this.DB;var a = this.DB - b;var g = (1 << a) - 1;var f = Math.floor(j / this.DB),h = (this.s << b) & this.DM,d;for (d = this.t - 1; d >= 0; --d) {e[d + f + 1] = (this[d] >> a) | h;h = (this[d] & g) << b}for (d = f - 1; d >= 0; --d) {e[d] = 0}e[f] = h;e.t = this.t + f + 1;e.s = this.s;e.clamp() } function bnpRShiftTo(g, d) {d.s = this.s;var e = Math.floor(g / this.DB);if (e >= this.t) {d.t = 0;return}var b = g % this.DB;var a = this.DB - b;var f = (1 << b) - 1;d[0] = this[e] >> b;for (var c = e + 1; c < this.t; ++c) {d[c - e - 1] |= (this[c] & f) << a;d[c - e] = this[c] >> b}if (b > 0) {d[this.t - e - 1] |= (this.s & f) << a}d.t = this.t - e;d.clamp() } function bnpSubTo(d, f) {var e = 0,g = 0,b = Math.min(d.t, this.t);while (e < b) {g += this[e] - d[e];f[e++] = g & this.DM;g >>= this.DB}if (d.t < this.t) {g -= d.s;while (e < this.t) {g += this[e];f[e++] = g & this.DM;g >>= this.DB}g += this.s} else {g += this.s;while (e < d.t) {g -= d[e];f[e++] = g & this.DM;g >>= this.DB}g -= d.s}f.s = (g < 0) ? -1 : 0;if (g < -1) {f[e++] = this.DV + g} else {if (g > 0) {f[e++] = g}}f.t = e;f.clamp() } function bnpMultiplyTo(c, e) {var b = this.abs(),f = c.abs();var d = b.t;e.t = d + f.t;while (--d >= 0) {e[d] = 0}for (d = 0; d < f.t; ++d) {e[d + b.t] = b.am(0, f[d], e, d, 0, b.t)}e.s = 0;e.clamp();if (this.s != c.s) {BigInteger.ZERO.subTo(e, e)} } function bnpSquareTo(d) {var a = this.abs();var b = d.t = 2 * a.t;while (--b >= 0) {d[b] = 0}for (b = 0; b < a.t - 1; ++b) {var e = a.am(b, a[b], d, 2 * b, 0, 1);if ((d[b + a.t] += a.am(b + 1, 2 * a[b], d, 2 * b + 1, e, a.t - b - 1)) >= a.DV) {d[b + a.t] -= a.DV;d[b + a.t + 1] = 1}}if (d.t > 0) {d[d.t - 1] += a.am(b, a[b], d, 2 * b, 0, 1)}d.s = 0;d.clamp() } function bnpDivRemTo(n, h, g) {var w = n.abs();if (w.t <= 0) {return}var k = this.abs();if (k.t < w.t) {if (h != null) {h.fromInt(0)}if (g != null) {this.copyTo(g)}return}if (g == null) {g = nbi()}var d = nbi(),a = this.s,l = n.s;var v = this.DB - nbits(w[w.t - 1]);if (v > 0) {w.lShiftTo(v, d);k.lShiftTo(v, g)} else {w.copyTo(d);k.copyTo(g)}var p = d.t;var b = d[p - 1];if (b == 0) {return}var o = b * (1 << this.F1) + ((p > 1) ? d[p - 2] >> this.F2 : 0);var A = this.FV / o,z = (1 << this.F1) / o,x = 1 << this.F2;var u = g.t,s = u - p,f = (h == null) ? nbi() : h;d.dlShiftTo(s, f);if (g.compareTo(f) >= 0) {g[g.t++] = 1;g.subTo(f, g)}BigInteger.ONE.dlShiftTo(p, f);f.subTo(d, d);while (d.t < p) {d[d.t++] = 0}while (--s >= 0) {var c = (g[--u] == b) ? this.DM : Math.floor(g[u] * A + (g[u - 1] + x) * z);if ((g[u] += d.am(0, c, g, s, 0, p)) < c) {d.dlShiftTo(s, f);g.subTo(f, g);while (g[u] < --c) {g.subTo(f, g)}}}if (h != null) {g.drShiftTo(p, h);if (a != l) {BigInteger.ZERO.subTo(h, h)}}g.t = p;g.clamp();if (v > 0) {g.rShiftTo(v, g)}if (a < 0) {BigInteger.ZERO.subTo(g, g)} } function bnMod(b) {var c = nbi();this.abs().divRemTo(b, null, c);if (this.s < 0 && c.compareTo(BigInteger.ZERO) > 0) {b.subTo(c, c)}return c } function Classic(a) {this.m = a } function cConvert(a) {if (a.s < 0 || a.compareTo(this.m) >= 0) {return a.mod(this.m)} else {return a} } function cRevert(a) {return a } function cReduce(a) {a.divRemTo(this.m, null, a) } function cMulTo(a, c, b) {a.multiplyTo(c, b);this.reduce(b) } function cSqrTo(a, b) {a.squareTo(b);this.reduce(b) } Classic.prototype.convert = cConvert; Classic.prototype.revert = cRevert; Classic.prototype.reduce = cReduce; Classic.prototype.mulTo = cMulTo; Classic.prototype.sqrTo = cSqrTo; function bnpInvDigit() {if (this.t < 1) {return 0}var a = this[0];if ((a & 1) == 0) {return 0}var b = a & 3;b = (b * (2 - (a & 15) * b)) & 15;b = (b * (2 - (a & 255) * b)) & 255;b = (b * (2 - (((a & 65535) * b) & 65535))) & 65535;b = (b * (2 - a * b % this.DV)) % this.DV;return (b > 0) ? this.DV - b : -b } function Montgomery(a) {this.m = a;this.mp = a.invDigit();this.mpl = this.mp & 32767;this.mph = this.mp >> 15;this.um = (1 << (a.DB - 15)) - 1;this.mt2 = 2 * a.t } function montConvert(a) {var b = nbi();a.abs().dlShiftTo(this.m.t, b);b.divRemTo(this.m, null, b);if (a.s < 0 && b.compareTo(BigInteger.ZERO) > 0) {this.m.subTo(b, b)}return b } function montRevert(a) {var b = nbi();a.copyTo(b);this.reduce(b);return b } function montReduce(a) {while (a.t <= this.mt2) {a[a.t++] = 0}for (var c = 0; c < this.m.t; ++c) {var b = a[c] & 32767;var d = (b * this.mpl + (((b * this.mph + (a[c] >> 15) * this.mpl) & this.um) << 15)) & a.DM;b = c + this.m.t;a[b] += this.m.am(0, d, a, c, 0, this.m.t);while (a[b] >= a.DV) {a[b] -= a.DV;a[++b]++}}a.clamp();a.drShiftTo(this.m.t, a);if (a.compareTo(this.m) >= 0) {a.subTo(this.m, a)} } function montSqrTo(a, b) {a.squareTo(b);this.reduce(b) } function montMulTo(a, c, b) {a.multiplyTo(c, b);this.reduce(b) } Montgomery.prototype.convert = montConvert; Montgomery.prototype.revert = montRevert; Montgomery.prototype.reduce = montReduce; Montgomery.prototype.mulTo = montMulTo; Montgomery.prototype.sqrTo = montSqrTo; function bnpIsEven() {return ((this.t > 0) ? (this[0] & 1) : this.s) == 0 } function bnpExp(h, j) {if (h > 4294967295 || h < 1) {return BigInteger.ONE}var f = nbi(),a = nbi(),d = j.convert(this),c = nbits(h) - 1;d.copyTo(f);while (--c >= 0) {j.sqrTo(f, a);if ((h & (1 << c)) > 0) {j.mulTo(a, d, f)} else {var b = f;f = a;a = b}}return j.revert(f) } function bnModPowInt(b, a) {var c;if (b < 256 || a.isEven()) {c = new Classic(a)} else {c = new Montgomery(a)}return this.exp(b, c) } //-----摘自網絡-----start BigInteger.prototype.toRadix = bnpToRadix; BigInteger.prototype.signum = bnSigNum; BigInteger.prototype.chunkSize = bnpChunkSize; BigInteger.prototype.intValue = bnIntValue; //-----摘自網絡-----end BigInteger.prototype.copyTo = bnpCopyTo; BigInteger.prototype.fromInt = bnpFromInt; BigInteger.prototype.fromString = bnpFromString; BigInteger.prototype.clamp = bnpClamp; BigInteger.prototype.dlShiftTo = bnpDLShiftTo; BigInteger.prototype.drShiftTo = bnpDRShiftTo; BigInteger.prototype.lShiftTo = bnpLShiftTo; BigInteger.prototype.rShiftTo = bnpRShiftTo; BigInteger.prototype.subTo = bnpSubTo; BigInteger.prototype.multiplyTo = bnpMultiplyTo; BigInteger.prototype.squareTo = bnpSquareTo; BigInteger.prototype.divRemTo = bnpDivRemTo; BigInteger.prototype.invDigit = bnpInvDigit; BigInteger.prototype.isEven = bnpIsEven; BigInteger.prototype.exp = bnpExp; BigInteger.prototype.toString = bnToString; BigInteger.prototype.negate = bnNegate; BigInteger.prototype.abs = bnAbs; BigInteger.prototype.compareTo = bnCompareTo; BigInteger.prototype.bitLength = bnBitLength; BigInteger.prototype.mod = bnMod; BigInteger.prototype.modPowInt = bnModPowInt; BigInteger.ZERO = nbv(0); BigInteger.ONE = nbv(1); function Arcfour() {this.i = 0;this.j = 0;this.S = new Array() } function ARC4init(d) {var c,a,b;for (c = 0; c < 256; ++c) {this.S[c] = c}a = 0;for (c = 0; c < 256; ++c) {a = (a + this.S[c] + d[c % d.length]) & 255;b = this.S[c];this.S[c] = this.S[a];this.S[a] = b}this.i = 0;this.j = 0 } function ARC4next() {var a;this.i = (this.i + 1) & 255;this.j = (this.j + this.S[this.i]) & 255;a = this.S[this.i];this.S[this.i] = this.S[this.j];this.S[this.j] = a;return this.S[(a + this.S[this.i]) & 255] } Arcfour.prototype.init = ARC4init; Arcfour.prototype.next = ARC4next; function prng_newstate() {return new Arcfour() } var rng_psize = 256; var rng_state; var rng_pool; var rng_pptr; function rng_seed_int(a) {rng_pool[rng_pptr++] ^= a & 255;rng_pool[rng_pptr++] ^= (a >> 8) & 255;rng_pool[rng_pptr++] ^= (a >> 16) & 255;rng_pool[rng_pptr++] ^= (a >> 24) & 255;if (rng_pptr >= rng_psize) {rng_pptr -= rng_psize} } function rng_seed_time() {rng_seed_int(new Date().getTime()) }if (rng_pool == null) { //注釋rng_pool = new Array();rng_pptr = 0;var t;// if (navigator.appName == "Netscape" && navigator.appVersion < "5" && window.crypto) {// var z = window.crypto.random(32);// for (t = 0; t < z.length; ++t) {// rng_pool[rng_pptr++] = z.charCodeAt(t) & 255// }// }// while (rng_pptr < rng_psize) {// t = Math.floor(65536 * Math.random());// rng_pool[rng_pptr++] = t >>> 8;// rng_pool[rng_pptr++] = t & 255// }// rng_pptr = 0;// rng_seed_time() } function rng_get_byte() {if (rng_state == null) {rng_seed_time();rng_state = prng_newstate();rng_state.init(rng_pool);for (rng_pptr = 0; rng_pptr < rng_pool.length; ++rng_pptr) {rng_pool[rng_pptr] = 0}rng_pptr = 0}return rng_state.next() } function rng_get_bytes(b) {var a;for (a = 0; a < b.length; ++a) {b[a] = rng_get_byte()} } function SecureRandom() {} SecureRandom.prototype.nextBytes = rng_get_bytes; function parseBigInt(b, a) {return new BigInteger(b, a) } function linebrk(c, d) {var a = "";var b = 0;while (b + d < c.length) {a += c.substring(b, b + d) + "\n";b += d}return a + c.substring(b, c.length) } function byte2Hex(a) {if (a < 16) {return "0" + a.toString(16)} else {return a.toString(16)} } function pkcs1pad2(e, h) {if (h < e.length + 11) { // alert("Message too long for RSA");return null}var g = new Array();var d = e.length - 1;while (d >= 0 && h > 0) {var f = e.charCodeAt(d--);if (f < 128) {g[--h] = f} else {if ((f > 127) && (f < 2048)) {g[--h] = (f & 63) | 128;g[--h] = (f >> 6) | 192} else {g[--h] = (f & 63) | 128;g[--h] = ((f >> 6) & 63) | 128;g[--h] = (f >> 12) | 224}}}g[--h] = 0;var b = new SecureRandom();var a = new Array();while (h > 2) {a[0] = 0;while (a[0] == 0) {b.nextBytes(a)}g[--h] = a[0]}g[--h] = 2;g[--h] = 0;return new BigInteger(g) } function RSAKey() {this.n = null;this.e = 0;this.d = null;this.p = null;this.q = null;this.dmp1 = null;this.dmq1 = null;this.coeff = null } function RSASetPublic(b, a) {if (b != null && a != null && b.length > 0 && a.length > 0) {this.n = parseBigInt(b, 16);this.e = parseInt(a, 16);return this.n.toString();} else { // alert("Invalid RSA public key")return 0;} } function RSADoPublic(a) {return a.modPowInt(this.e, this.n) } function RSAEncrypt(d) {var a = pkcs1pad2(d, (this.n.bitLength() + 7) >> 3);if (a == null) {return null}var e = this.doPublic(a);if (e == null) {return null}var b = e.toString(16);if ((b.length & 1) == 0) {return b} else {return "0" + b}return a; } RSAKey.prototype.doPublic = RSADoPublic; RSAKey.prototype.setPublic = RSASetPublic; RSAKey.prototype.encrypt = RSAEncrypt; var b64map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; var b64pad = "="; function hex2b64(d) {var b;var e;var a = "";for (b = 0; b + 3 <= d.length; b += 3) {e = parseInt(d.substring(b, b + 3), 16);a += b64map.charAt(e >> 6) + b64map.charAt(e & 63)}if (b + 1 == d.length) {e = parseInt(d.substring(b, b + 1), 16);a += b64map.charAt(e << 2)} else {if (b + 2 == d.length) {e = parseInt(d.substring(b, b + 2), 16);a += b64map.charAt(e >> 2) + b64map.charAt((e & 3) << 4)}}while ((a.length & 3) > 0) {a += b64pad}return a } function b64tohex(e) {var c = "";var d;var a = 0;var b;for (d = 0; d < e.length; ++d) {if (e.charAt(d) == b64pad) {break}v = b64map.indexOf(e.charAt(d));if (v < 0) {continue}if (a == 0) {c += int2char(v >> 2);b = v & 3;a = 1} else {if (a == 1) {c += int2char((b << 2) | (v >> 4));b = v & 15;a = 2} else {if (a == 2) {c += int2char(b);c += int2char(v >> 2);b = v & 3;a = 3} else {c += int2char((b << 2) | (v >> 4));c += int2char(v & 15);a = 0}}}}if (a == 1) {c += int2char(b << 2)}return c } function b64toBA(e) {var d = b64tohex(e);var c;var b = new Array();for (c = 0; 2 * c < d.length; ++c) {b[c] = parseInt(d.substring(2 * c, 2 * c + 2), 16)}return b }; View Code

感謝原作者https://www.cnblogs.com/xpp142857/p/6994763.html

轉載于:https://www.cnblogs.com/a00ium/p/10361483.html

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