PHP+JS+rsa数据加密传输实现代码

答案：
JS端代码: 
复制代码 代码如下:
 
//文件base64.js: 
var b64map="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 
var b64pad="="; 
function hex2b64(h) { 
var i; 
var c; 
var ret = ""; 
for(i = 0; i+3 <= h.length; i+=3) { 
c = parseInt(h.substring(i,i+3),16); 
ret += b64map.charAt(c >> 6) + b64map.charAt(c & 63); 
} 
if(i+1 == h.length) { 
c = parseInt(h.substring(i,i+1),16); 
ret += b64map.charAt(c << 2); 
} 
else if(i+2 == h.length) { 
c = parseInt(h.substring(i,i+2),16); 
ret += b64map.charAt(c >> 2) + b64map.charAt((c & 3) << 4); 
} 
while((ret.length & 3) > 0) ret += b64pad; 
return ret; 
} 
// convert a base64 string to hex 
function b64tohex(s) { 
var ret = "" 
var i; 
var k = 0; // b64 state, 0-3 
var slop; 
for(i = 0; i < s.length; ++i) { 
if(s.charAt(i) == b64pad) break; 
v = b64map.indexOf(s.charAt(i)); 
if(v < 0) continue; 
if(k == 0) { 
ret += int2char(v >> 2); 
slop = v & 3; 
k = 1; 
} 
else if(k == 1) { 
ret += int2char((slop << 2) | (v >> 4)); 
slop = v & 0xf; 
k = 2; 
} 
else if(k == 2) { 
ret += int2char(slop); 
ret += int2char(v >> 2); 
slop = v & 3; 
k = 3; 
} 
else { 
ret += int2char((slop << 2) | (v >> 4)); 
ret += int2char(v & 0xf); 
k = 0; 
} 
} 
if(k == 1) 
ret += int2char(slop << 2); 
return ret; 
} 
// convert a base64 string to a byte/number array 
function b64toBA(s) { 
//piggyback on b64tohex for now, optimize later 
var h = b64tohex(s); 
var i; 
var a = new Array(); 
for(i = 0; 2*i < h.length; ++i) { 
a[i] = parseInt(h.substring(2*i,2*i+2),16); 
} 
return a; 
} 
#文件jsbn.js 
// Copyright (c) 2005 Tom Wu 
// All Rights Reserved. 
// See "LICENSE" for details. 
// Basic JavaScript BN library - subset useful for RSA encryption. 
// Bits per digit 
var dbits; 
// JavaScript engine analysis 
var canary = 0xdeadbeefcafe; 
var j_lm = ((canary&0xffffff)==0xefcafe); 
// (public) Constructor 
function BigInteger(a,b,c) { 
if(a != null) 
if("number" == typeof a) this.fromNumber(a,b,c); 
else if(b == null && "string" != typeof a) this.fromString(a,256); 
else this.fromString(a,b); 
} 
// return new, unset BigInteger 
function nbi() { return new BigInteger(null); } 
// am: Compute w_j += (x*this_i), propagate carries, 
// c is initial carry, returns final carry. 
// c < 3*dvalue, x < 2*dvalue, this_i < dvalue 
// We need to select the fastest one that works in this environment. 
// am1: use a single mult and divide to get the high bits, 
// max digit bits should be 26 because 
// max internal value = 2*dvalue^2-2*dvalue (< 2^53) 
function am1(i,x,w,j,c,n) { 
while(--n >= 0) { 
var v = x*this[i++]+w[j]+c; 
c = Math.floor(v/0x4000000); 
w[j++] = v&0x3ffffff; 
} 
return c; 
} 
// am2 avoids a big mult-and-extract completely. 
// Max digit bits should be <= 30 because we do bitwise ops 
// on values up to 2*hdvalue^2-hdvalue-1 (< 2^31) 
function am2(i,x,w,j,c,n) { 
var xl = x&0x7fff, xh = x>>15; 
while(--n >= 0) { 
var l = this[i]&0x7fff; 
var h = this[i++]>>15; 
var m = xh*l+h*xl; 
l = xl*l+((m&0x7fff)<<15)+w[j]+(c&0x3fffffff); 
c = (l>>>30)+(m>>>15)+xh*h+(c>>>30); 
w[j++] = l&0x3fffffff; 
} 
return c; 
} 
// Alternately, set max digit bits to 28 since some 
// browsers slow down when dealing with 32-bit numbers. 
function am3(i,x,w,j,c,n) { 
var xl = x&0x3fff, xh = x>>14; 
while(--n >= 0) { 
var l = this[i]&0x3fff; 
var h = this[i++]>>14; 
var m = xh*l+h*xl; 
l = xl*l+((m&0x3fff)<<14)+w[j]+c; 
c = (l>>28)+(m>>14)+xh*h; 
w[j++] = l&0xfffffff; 
} 
return c; 
} 
if(j_lm && (navigator.appName == "Microsoft Internet Explorer")) { 
BigInteger.prototype.am = am2; 
dbits = 30; 
} 
else if(j_lm && (navigator.appName != "Netscape")) { 
BigInteger.prototype.am = am1; 
dbits = 26; 
} 
else { // Mozilla/Netscape seems to prefer am3 
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; 
// Digit conversions 
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(n) { return BI_RM.charAt(n); } 
function intAt(s,i) { 
var c = BI_RC[s.charCodeAt(i)]; 
return (c==null)?-1:c; 
} 
// (protected) copy this to r 
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; }

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