forked from rachanon/stdbWeb
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3 lines
2.4 KiB
3 lines
2.4 KiB
9 years ago
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/*! (c) Tom Wu | http://www-cs-students.stanford.edu/~tjw/jsbn/
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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 oaep_mgf1_arr(c,a,e){var b="",d=0;while(b.length<a){b+=e(String.fromCharCode.apply(String,c.concat([(d&4278190080)>>24,(d&16711680)>>16,(d&65280)>>8,d&255])));d+=1}return b}var SHA1_SIZE=20;function oaep_pad(l,a,c){if(l.length+2*SHA1_SIZE+2>a){throw"Message too long for RSA"}var h="",d;for(d=0;d<a-l.length-2*SHA1_SIZE-2;d+=1){h+="\x00"}var e=rstr_sha1("")+h+"\x01"+l;var f=new Array(SHA1_SIZE);new SecureRandom().nextBytes(f);var g=oaep_mgf1_arr(f,e.length,c||rstr_sha1);var k=[];for(d=0;d<e.length;d+=1){k[d]=e.charCodeAt(d)^g.charCodeAt(d)}var j=oaep_mgf1_arr(k,f.length,rstr_sha1);var b=[0];for(d=0;d<f.length;d+=1){b[d+1]=f[d]^j.charCodeAt(d)}return new BigInteger(b.concat(k))}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){this.isPublic=true;if(typeof b!=="string"){this.n=b;this.e=a}else{if(b!=null&&a!=null&&b.length>0&&a.length>0){this.n=parseBigInt(b,16);this.e=parseInt(a,16)}else{alert("Invalid RSA public key")}}}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}}function RSAEncryptOAEP(e,d){var a=oaep_pad(e,(this.n.bitLength()+7)>>3,d);if(a==null){return null}var f=this.doPublic(a);if(f==null){return null}var b=f.toString(16);if((b.length&1)==0){return b}else{return"0"+b}}RSAKey.prototype.doPublic=RSADoPublic;RSAKey.prototype.setPublic=RSASetPublic;RSAKey.prototype.encrypt=RSAEncrypt;RSAKey.prototype.encryptOAEP=RSAEncryptOAEP;RSAKey.prototype.type="RSA";
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