常见的加密方式实例

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通常在我们测逻辑漏洞或写爬虫的时候,如果遇到前端加密,我们可以选择将加密算法拖出来,对自己调试的参数进行加密。

常见的加密方式实例

MD5加密实例

  1. 登录测试,获取到post参数
  2. 在疑似点下断,并再次发包

  3. 查看此处值与加密后的值相同,所以这个就是加密算法
  4. 这是一个闭包函数,实现加密算法

~这里可以直接用md5进行加密测试,但不排除他命名为md5(),实际上自己实现的加密算法。~

(function(g) {
    function o(u, z) {
        var w = (u & 65535) + (z & 65535)
          , v = (u >> 16) + (z >> 16) + (w >> 16);
        return (v << 16) | (w & 65535)
    }
    function s(u, v) {
        return (u << v) | (u >>> (32 - v))
    }
    function c(A, w, v, u, z, y) {
        return o(s(o(o(w, A), o(u, y)), z), v)
    }
    function b(w, v, B, A, u, z, y) {
        return c((v & B) | ((~v) & A), w, v, u, z, y)
    }
    function i(w, v, B, A, u, z, y) {
        return c((v & A) | (B & (~A)), w, v, u, z, y)
    }
    function n(w, v, B, A, u, z, y) {
        return c(v ^ B ^ A, w, v, u, z, y)
    }
    function a(w, v, B, A, u, z, y) {
        return c(B ^ (v | (~A)), w, v, u, z, y)
    }
    function d(F, A) {
        F[A >> 5] |= 128 << ((A) % 32);
        F[(((A + 64) >>> 9) << 4) + 14] = A;
        var w, z, y, v, u, E = 1732584193, D = -271733879, C = -1732584194, B = 271733878;
        for (w = 0; w < F.length; w += 16) {
            z = E;
            y = D;
            v = C;
            u = B;
            E = b(E, D, C, B, F[w], 7, -680876936);
            B = b(B, E, D, C, F[w + 1], 12, -389564586);
            C = b(C, B, E, D, F[w + 2], 17, 606105819);
            D = b(D, C, B, E, F[w + 3], 22, -1044525330);
            E = b(E, D, C, B, F[w + 4], 7, -176418897);
            B = b(B, E, D, C, F[w + 5], 12, 1200080426);
            C = b(C, B, E, D, F[w + 6], 17, -1473231341);
            D = b(D, C, B, E, F[w + 7], 22, -45705983);
            E = b(E, D, C, B, F[w + 8], 7, 1770035416);
            B = b(B, E, D, C, F[w + 9], 12, -1958414417);
            C = b(C, B, E, D, F[w + 10], 17, -42063);
            D = b(D, C, B, E, F[w + 11], 22, -1990404162);
            E = b(E, D, C, B, F[w + 12], 7, 1804603682);
            B = b(B, E, D, C, F[w + 13], 12, -40341101);
            C = b(C, B, E, D, F[w + 14], 17, -1502002290);
            D = b(D, C, B, E, F[w + 15], 22, 1236535329);
            E = i(E, D, C, B, F[w + 1], 5, -165796510);
            B = i(B, E, D, C, F[w + 6], 9, -1069501632);
            C = i(C, B, E, D, F[w + 11], 14, 643717713);
            D = i(D, C, B, E, F[w], 20, -373897302);
            E = i(E, D, C, B, F[w + 5], 5, -701558691);
            B = i(B, E, D, C, F[w + 10], 9, 38016083);
            C = i(C, B, E, D, F[w + 15], 14, -660478335);
            D = i(D, C, B, E, F[w + 4], 20, -405537848);
            E = i(E, D, C, B, F[w + 9], 5, 568446438);
            B = i(B, E, D, C, F[w + 14], 9, -1019803690);
            C = i(C, B, E, D, F[w + 3], 14, -187363961);
            D = i(D, C, B, E, F[w + 8], 20, 1163531501);
            E = i(E, D, C, B, F[w + 13], 5, -1444681467);
            B = i(B, E, D, C, F[w + 2], 9, -51403784);
            C = i(C, B, E, D, F[w + 7], 14, 1735328473);
            D = i(D, C, B, E, F[w + 12], 20, -1926607734);
            E = n(E, D, C, B, F[w + 5], 4, -378558);
            B = n(B, E, D, C, F[w + 8], 11, -2022574463);
            C = n(C, B, E, D, F[w + 11], 16, 1839030562);
            D = n(D, C, B, E, F[w + 14], 23, -35309556);
            E = n(E, D, C, B, F[w + 1], 4, -1530992060);
            B = n(B, E, D, C, F[w + 4], 11, 1272893353);
            C = n(C, B, E, D, F[w + 7], 16, -155497632);
            D = n(D, C, B, E, F[w + 10], 23, -1094730640);
            E = n(E, D, C, B, F[w + 13], 4, 681279174);
            B = n(B, E, D, C, F[w], 11, -358537222);
            C = n(C, B, E, D, F[w + 3], 16, -722521979);
            D = n(D, C, B, E, F[w + 6], 23, 76029189);
            E = n(E, D, C, B, F[w + 9], 4, -640364487);
            B = n(B, E, D, C, F[w + 12], 11, -421815835);
            C = n(C, B, E, D, F[w + 15], 16, 530742520);
            D = n(D, C, B, E, F[w + 2], 23, -995338651);
            E = a(E, D, C, B, F[w], 6, -198630844);
            B = a(B, E, D, C, F[w + 7], 10, 1126891415);
            C = a(C, B, E, D, F[w + 14], 15, -1416354905);
            D = a(D, C, B, E, F[w + 5], 21, -57434055);
            E = a(E, D, C, B, F[w + 12], 6, 1700485571);
            B = a(B, E, D, C, F[w + 3], 10, -1894986606);
            C = a(C, B, E, D, F[w + 10], 15, -1051523);
            D = a(D, C, B, E, F[w + 1], 21, -2054922799);
            E = a(E, D, C, B, F[w + 8], 6, 1873313359);
            B = a(B, E, D, C, F[w + 15], 10, -30611744);
            C = a(C, B, E, D, F[w + 6], 15, -1560198380);
            D = a(D, C, B, E, F[w + 13], 21, 1309151649);
            E = a(E, D, C, B, F[w + 4], 6, -145523070);
            B = a(B, E, D, C, F[w + 11], 10, -1120210379);
            C = a(C, B, E, D, F[w + 2], 15, 718787259);
            D = a(D, C, B, E, F[w + 9], 21, -343485551);
            E = o(E, z);
            D = o(D, y);
            C = o(C, v);
            B = o(B, u)
        }
        return [E, D, C, B]
    }
    function p(v) {
        var w, u = "";
        for (w = 0; w < v.length * 32; w += 8) {
            u += String.fromCharCode((v[w >> 5] >>> (w % 32)) & 255)
        }
        return u
    }
    function j(v) {
        var w, u = [];
        u[(v.length >> 2) - 1] = undefined;
        for (w = 0; w < u.length; w += 1) {
            u[w] = 0
        }
        for (w = 0; w < v.length * 8; w += 8) {
            u[w >> 5] |= (v.charCodeAt(w / 8) & 255) << (w % 32)
        }
        return u
    }
    function k(u) {
        return p(d(j(u), u.length * 8))
    }
    function f(w, z) {
        var v, y = j(w), u = [], x = [], A;
        u[15] = x[15] = undefined;
        if (y.length > 16) {
            y = d(y, w.length * 8)
        }
        for (v = 0; v < 16; v += 1) {
            u[v] = y[v] ^ 909522486;
            x[v] = y[v] ^ 1549556828
        }
        A = d(u.concat(j(z)), 512 + z.length * 8);
        return p(d(x.concat(A), 512 + 128))
    }
    function t(w) {
        var z = "0123456789abcdef", v = "", u, y;
        for (y = 0; y < w.length; y += 1) {
            u = w.charCodeAt(y);
            v += z.charAt((u >>> 4) & 15) + z.charAt(u & 15)
        }
        return v
    }
    function m(u) {
        return unescape(encodeURIComponent(u))
    }
    function q(u) {
        return k(m(u))
    }
    function l(u) {
        return t(q(u))
    }
    function h(u, v) {
        return f(m(u), m(v))
    }
    function r(u, v) {
        return t(h(u, v))
    }
    g.md5 = function(v, w, u) {
        if (!w) {
            if (!u) {
                return l(v)
            } else {
                return q(v)
            }
        }
        if (!u) {
            return r(w, v)
        } else {
            return h(w, v)
        }
    }
}(typeof jQuery === "function" ? jQuery : this));

调试这段代码

python执行

RSA非对称密钥加密实例

登录发包

疑似点下断

查找加密算法

加密算法实现and调试

var RSAPublicKey = function($modulus_hex, $encryptionExponent_hex) {
    this.modulus = new BigInteger( $modulus_hex, 16);
    this.encryptionExponent = new BigInteger( $encryptionExponent_hex, 16);
};

var Base64 = {
    base64: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
    encode: function($input) {
        if (!$input) {
            return false;
        }
        var $output = "";
        var $chr1, $chr2, $chr3;
        var $enc1, $enc2, $enc3, $enc4;
        var $i = 0;
        do {
            $chr1 = $input.charCodeAt($i++);
            $chr2 = $input.charCodeAt($i++);
            $chr3 = $input.charCodeAt($i++);
            $enc1 = $chr1 >> 2;
            $enc2 = (($chr1 & 3) << 4) | ($chr2 >> 4);
            $enc3 = (($chr2 & 15) << 2) | ($chr3 >> 6);
            $enc4 = $chr3 & 63;
            if (isNaN($chr2)) $enc3 = $enc4 = 64;
            else if (isNaN($chr3)) $enc4 = 64;
            $output += this.base64.charAt($enc1) + this.base64.charAt($enc2) + this.base64.charAt($enc3) + this.base64.charAt($enc4);
        } while ($i < $input.length);
        return $output;
    },
    decode: function($input) {
        if(!$input) return false;
        $input = $input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
        var $output = "";
        var $enc1, $enc2, $enc3, $enc4;
        var $i = 0;
        do {
            $enc1 = this.base64.indexOf($input.charAt($i++));
            $enc2 = this.base64.indexOf($input.charAt($i++));
            $enc3 = this.base64.indexOf($input.charAt($i++));
            $enc4 = this.base64.indexOf($input.charAt($i++));
            $output += String.fromCharCode(($enc1 << 2) | ($enc2 >> 4));
            if ($enc3 != 64) $output += String.fromCharCode((($enc2 & 15) << 4) | ($enc3 >> 2));
            if ($enc4 != 64) $output += String.fromCharCode((($enc3 & 3) << 6) | $enc4);
        } while ($i < $input.length);
        return $output;
    }
};

var Hex = {
    hex: "0123456789abcdef",
    encode: function($input) {
        if(!$input) return false;
        var $output = "";
        var $k;
        var $i = 0;
        do {
            $k = $input.charCodeAt($i++);
            $output += this.hex.charAt(($k >> 4) &0xf) + this.hex.charAt($k & 0xf);
        } while ($i < $input.length);
        return $output;
    },
    decode: function($input) {
        if(!$input) return false;
        $input = $input.replace(/[^0-9abcdef]/g, "");
        var $output = "";
        var $i = 0;
        do {
            $output += String.fromCharCode(((this.hex.indexOf($input.charAt($i++)) << 4) & 0xf0) | (this.hex.indexOf($input.charAt($i++)) & 0xf));
        } while ($i < $input.length);
        return $output;
    }
};
  • BigInteger未定义,查找这个函数实现并贴上去
function bnpCopyTo(r) {
    for(var i = this.t-1; i >= 0; --i) r[i] = this[i];
    r.t = this.t;
    r.s = this.s;
}

// (protected) set from integer value x, -DV <= x < DV
function bnpFromInt(x) {
    this.t = 1;
    this.s = (x<0)?-1:0;
    if(x > 0) this[0] = x;
    else if(x < -1) this[0] = x+DV;
    else this.t = 0;
}

// return bigint initialized to value
function nbv(i) { var r = nbi(); r.fromInt(i); return r; }

// (protected) set from string and radix
function bnpFromString(s,b) {
    var k;
    if(b == 16) k = 4;
    else if(b == 8) k = 3;
    else if(b == 256) k = 8; // byte array
    else if(b == 2) k = 1;
    else if(b == 32) k = 5;
    else if(b == 4) k = 2;
    else { this.fromRadix(s,b); return; }
    this.t = 0;
    this.s = 0;
    var i = s.length, mi = false, sh = 0;
    while(--i >= 0) {
        var x = (k==8)?s[i]&0xff:intAt(s,i);
        if(x < 0) {
            if(s.charAt(i) == "-") mi = true;
            continue;
        }
        mi = false;
        if(sh == 0)
            this[this.t++] = x;
        else if(sh+k > this.DB) {
            this[this.t-1] |= (x&((1<<(this.DB-sh))-1))<<sh;
            this[this.t++] = (x>>(this.DB-sh));
        }
        else
            this[this.t-1] |= x<<sh;
        sh += k;
        if(sh >= this.DB) sh -= this.DB;
    }
    if(k == 8 && (s[0]&0x80) != 0) {
        this.s = -1;
        if(sh > 0) this[this.t-1] |= ((1<<(this.DB-sh))-1)<<sh;
    }
    this.clamp();
    if(mi) BigInteger.ZERO.subTo(this,this);
}

// (protected) clamp off excess high words
function bnpClamp() {
    var c = this.s&this.DM;
    while(this.t > 0 && this[this.t-1] == c) --this.t;
}

// (public) return string representation in given radix
function bnToString(b) {
    if(this.s < 0) return "-"+this.negate().toString(b);
    var k;
    if(b == 16) k = 4;
    else if(b == 8) k = 3;
    else if(b == 2) k = 1;
    else if(b == 32) k = 5;
    else if(b == 4) k = 2;
    else return this.toRadix(b);
    var km = (1<<k)-1, d, m = false, r = "", i = this.t;
    var p = this.DB-(i*this.DB)%k;
    if(i-- > 0) {
        if(p < this.DB && (d = this[i]>>p) > 0) { m = true; r = int2char(d); }
        while(i >= 0) {
            if(p < k) {
                d = (this[i]&((1<<p)-1))<<(k-p);
                d |= this[--i]>>(p+=this.DB-k);
            }
            else {
                d = (this[i]>>(p-=k))&km;
                if(p <= 0) { p += this.DB; --i; }
            }
            if(d > 0) m = true;
            if(m) r += int2char(d);
        }
    }
    return m?r:"0";
}

// (public) -this
function bnNegate() { var r = nbi(); BigInteger.ZERO.subTo(this,r); return r; }

// (public) |this|
function bnAbs() { return (this.s<0)?this.negate():this; }

// (public) return + if this > a, - if this < a, 0 if equal
function bnCompareTo(a) {
    var r = this.s-a.s;
    if(r != 0) return r;
    var i = this.t;
    r = i-a.t;
    if(r != 0) return r;
    while(--i >= 0) if((r=this[i]-a[i]) != 0) return r;
    return 0;
}

// returns bit length of the integer x
function nbits(x) {
    var r = 1, t;
    if((t=x>>>16) != 0) { x = t; r += 16; }
    if((t=x>>8) != 0) { x = t; r += 8; }
    if((t=x>>4) != 0) { x = t; r += 4; }
    if((t=x>>2) != 0) { x = t; r += 2; }
    if((t=x>>1) != 0) { x = t; r += 1; }
    return r;
}

// (public) return the number of bits in "this"
function bnBitLength() {
    if(this.t <= 0) return 0;
    return this.DB*(this.t-1)+nbits(this[this.t-1]^(this.s&this.DM));
}

// (protected) r = this << n*DB
function bnpDLShiftTo(n,r) {
    var i;
    for(i = this.t-1; i >= 0; --i) r[i+n] = this[i];
    for(i = n-1; i >= 0; --i) r[i] = 0;
    r.t = this.t+n;
    r.s = this.s;
}

// (protected) r = this >> n*DB
function bnpDRShiftTo(n,r) {
    for(var i = n; i < this.t; ++i) r[i-n] = this[i];
    r.t = Math.max(this.t-n,0);
    r.s = this.s;
}

// (protected) r = this << n
function bnpLShiftTo(n,r) {
    var bs = n%this.DB;
    var cbs = this.DB-bs;
    var bm = (1<<cbs)-1;
    var ds = Math.floor(n/this.DB), c = (this.s<<bs)&this.DM, i;
    for(i = this.t-1; i >= 0; --i) {
        r[i+ds+1] = (this[i]>>cbs)|c;
        c = (this[i]&bm)<<bs;
    }
    for(i = ds-1; i >= 0; --i) r[i] = 0;
    r[ds] = c;
    r.t = this.t+ds+1;
    r.s = this.s;
    r.clamp();
}

// (protected) r = this >> n
function bnpRShiftTo(n,r) {
    r.s = this.s;
    var ds = Math.floor(n/this.DB);
    if(ds >= this.t) { r.t = 0; return; }
    var bs = n%this.DB;
    var cbs = this.DB-bs;
    var bm = (1<<bs)-1;
    r[0] = this[ds]>>bs;
    for(var i = ds+1; i < this.t; ++i) {
        r[i-ds-1] |= (this[i]&bm)<<cbs;
        r[i-ds] = this[i]>>bs;
    }
    if(bs > 0) r[this.t-ds-1] |= (this.s&bm)<<cbs;
    r.t = this.t-ds;
    r.clamp();
}

‘navigator’ 未定义,将 navigator = this贴上去

调试加密算法

python执行

自写加密算法加密实例

登录发包

疑似点下断调试

查找加密算法

加密算法实现

function p(e, t) {
var n = (65535 & e) + (65535 & t);
return (e >> 16) + (t >> 16) + (n >> 16) << 16 | 65535 & n
}
function a(e, t, n, o, i, r) {
return p((s = p(p(t, e), p(o, r))) << (a = i) | s >>> 32 - a, n);
var s, a
}
function l(e, t, n, o, i, r, s) {
return a(t & n | ~t & o, e, t, i, r, s)
}
function m(e, t, n, o, i, r, s) {
return a(t & o | n & ~o, e, t, i, r, s)
}
function f(e, t, n, o, i, r, s) {
return a(t ^ n ^ o, e, t, i, r, s)
}
function g(e, t, n, o, i, r, s) {
return a(n ^ (t | ~o), e, t, i, r, s)
}
function c(e, t) {
e[t >> 5] |= 128 << t % 32,
e[14 + (t + 64 >>> 9 << 4)] = t;
var n, o, i, r, s, a = 1732584193,
c = -271733879,
u = -1732584194,
d = 271733878;
for (n = 0; n < e.length; n += 16) a = l(o = a, i = c, r = u, s = d, e[n], 7, -680876936),
d = l(d, a, c, u, e[n + 1], 12, -389564586),
u = l(u, d, a, c, e[n + 2], 17, 606105819),
c = l(c, u, d, a, e[n + 3], 22, -1044525330),
a = l(a, c, u, d, e[n + 4], 7, -176418897),
d = l(d, a, c, u, e[n + 5], 12, 1200080426),
u = l(u, d, a, c, e[n + 6], 17, -1473231341),
c = l(c, u, d, a, e[n + 7], 22, -45705983),
a = l(a, c, u, d, e[n + 8], 7, 1770035416),
d = l(d, a, c, u, e[n + 9], 12, -1958414417),
u = l(u, d, a, c, e[n + 10], 17, -42063),
c = l(c, u, d, a, e[n + 11], 22, -1990404162),
a = l(a, c, u, d, e[n + 12], 7, 1804603682),
d = l(d, a, c, u, e[n + 13], 12, -40341101),
u = l(u, d, a, c, e[n + 14], 17, -1502002290),
a = m(a, c = l(c, u, d, a, e[n + 15], 22, 1236535329), u, d, e[n + 1], 5, -165796510),
d = m(d, a, c, u, e[n + 6], 9, -1069501632),
u = m(u, d, a, c, e[n + 11], 14, 643717713),
c = m(c, u, d, a, e[n], 20, -373897302),
a = m(a, c, u, d, e[n + 5], 5, -701558691),
d = m(d, a, c, u, e[n + 10], 9, 38016083),
u = m(u, d, a, c, e[n + 15], 14, -660478335),
c = m(c, u, d, a, e[n + 4], 20, -405537848),
a = m(a, c, u, d, e[n + 9], 5, 568446438),
d = m(d, a, c, u, e[n + 14], 9, -1019803690),
u = m(u, d, a, c, e[n + 3], 14, -187363961),
c = m(c, u, d, a, e[n + 8], 20, 1163531501),
a = m(a, c, u, d, e[n + 13], 5, -1444681467),
d = m(d, a, c, u, e[n + 2], 9, -51403784),
u = m(u, d, a, c, e[n + 7], 14, 1735328473),
a = f(a, c = m(c, u, d, a, e[n + 12], 20, -1926607734), u, d, e[n + 5], 4, -378558),
d = f(d, a, c, u, e[n + 8], 11, -2022574463),
u = f(u, d, a, c, e[n + 11], 16, 1839030562),
c = f(c, u, d, a, e[n + 14], 23, -35309556),
a = f(a, c, u, d, e[n + 1], 4, -1530992060),
d = f(d, a, c, u, e[n + 4], 11, 1272893353),
u = f(u, d, a, c, e[n + 7], 16, -155497632),
c = f(c, u, d, a, e[n + 10], 23, -1094730640),
a = f(a, c, u, d, e[n + 13], 4, 681279174),
d = f(d, a, c, u, e[n], 11, -358537222),
u = f(u, d, a, c, e[n + 3], 16, -722521979),
c = f(c, u, d, a, e[n + 6], 23, 76029189),
a = f(a, c, u, d, e[n + 9], 4, -640364487),
d = f(d, a, c, u, e[n + 12], 11, -421815835),
u = f(u, d, a, c, e[n + 15], 16, 530742520),
a = g(a, c = f(c, u, d, a, e[n + 2], 23, -995338651), u, d, e[n], 6, -198630844),
d = g(d, a, c, u, e[n + 7], 10, 1126891415),
u = g(u, d, a, c, e[n + 14], 15, -1416354905),
c = g(c, u, d, a, e[n + 5], 21, -57434055),
a = g(a, c, u, d, e[n + 12], 6, 1700485571),
d = g(d, a, c, u, e[n + 3], 10, -1894986606),
u = g(u, d, a, c, e[n + 10], 15, -1051523),
c = g(c, u, d, a, e[n + 1], 21, -2054922799),
a = g(a, c, u, d, e[n + 8], 6, 1873313359),
d = g(d, a, c, u, e[n + 15], 10, -30611744),
u = g(u, d, a, c, e[n + 6], 15, -1560198380),
c = g(c, u, d, a, e[n + 13], 21, 1309151649),
a = g(a, c, u, d, e[n + 4], 6, -145523070),
d = g(d, a, c, u, e[n + 11], 10, -1120210379),
u = g(u, d, a, c, e[n + 2], 15, 718787259),
c = g(c, u, d, a, e[n + 9], 21, -343485551),
a = p(a, o),
c = p(c, i),
u = p(u, r),
d = p(d, s);
return [a, c, u, d]
}
function u(e) {
var t, n = "";
for (t = 0; t < 32 * e.length; t += 8) n += String.fromCharCode(e[t >> 5] >>> t % 32 & 255);
return n
}
function d(e) {
var t, n = [];
for (n[(e.length >> 2) - 1] = void 0, t = 0; t < n.length; t += 1) n[t] = 0;
for (t = 0; t < 8 * e.length; t += 8) n[t >> 5] |= (255 & e.charCodeAt(t / 8)) << t % 32;
return n
}
function o(e) {
var t, n, o = "0123456789abcdef",
i = "";
for (n = 0; n < e.length; n += 1) t = e.charCodeAt(n),
i += o.charAt(t >>> 4 & 15) + o.charAt(15 & t);
return i
}
function i(e) {
return unescape(encodeURIComponent(e))
}
function r(e) {
return u(c(d(t = i(e)), 8 * t.length));
var t
}
function s(e, t) {
return function(e, t) {
    var n, o, i = d(e),
    r = [],
    s = [];
    for (r[15] = s[15] = void 0, 16 < i.length && (i = c(i, 8 * e.length)), n = 0; n < 16; n += 1) r[n] = 909522486 ^ i[n],
    s[n] = 1549556828 ^ i[n];
    return o = c(r.concat(d(t)), 512 + 8 * t.length),
    u(c(s.concat(o), 640))
} (i(e), i(t))
}
function getpwd(e, t, n) {
return t ? n ? s(t, e) : o(s(t, e)) : n ? r(e) : o(r(e))
}

调试加密算法

python执行

 

总结

以上就是几种常见的前端加密算法的处理方式

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