You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
3 lines
4.4 KiB
3 lines
4.4 KiB
/*! dsa-modified-1.0.1.js (c) Recurity Labs GmbH, Kenji Urushimma | github.com/openpgpjs/openpgpjs/blob/master/LICENSE |
|
*/ |
|
if(typeof KJUR=="undefined"||!KJUR){KJUR={}}if(typeof KJUR.crypto=="undefined"||!KJUR.crypto){KJUR.crypto={}}KJUR.crypto.DSA=function(){this.p=null;this.q=null;this.g=null;this.y=null;this.x=null;this.type="DSA";this.setPrivate=function(z,w,v,A,u){this.isPrivate=true;this.p=z;this.q=w;this.g=v;this.y=A;this.x=u};this.setPublic=function(w,v,u,z){this.isPublic=true;this.p=w;this.q=v;this.g=u;this.y=z;this.x=null};this.signWithMessageHash=function(z){var v=this.p;var u=this.q;var C=this.g;var D=this.y;var E=this.x;var A=z.substr(0,u.bitLength()/4);var B=new BigInteger(z,16);var w=n(BigInteger.ONE.add(BigInteger.ONE),u.subtract(BigInteger.ONE));var G=(C.modPow(w,v)).mod(u);var F=(w.modInverse(u).multiply(B.add(E.multiply(G)))).mod(u);var H=KJUR.asn1.ASN1Util.jsonToASN1HEX({seq:[{"int":{bigint:G}},{"int":{bigint:F}}]});return H};this.verifyWithMessageHash=function(C,B){var z=this.p;var u=this.q;var G=this.g;var H=this.y;var E=this.parseASN1Signature(B);var K=E[0];var J=E[1];var C=C.substr(0,u.bitLength()/4);var D=new BigInteger(C,16);if(BigInteger.ZERO.compareTo(K)>0||K.compareTo(u)>0||BigInteger.ZERO.compareTo(J)>0||J.compareTo(u)>0){throw"invalid DSA signature"}var I=J.modInverse(u);var A=D.multiply(I).mod(u);var v=K.multiply(I).mod(u);var F=G.modPow(A,z).multiply(H.modPow(v,z)).mod(z).mod(u);return F.compareTo(K)==0};this.parseASN1Signature=function(u){try{var y=new BigInteger(ASN1HEX.getVbyList(u,0,[0],"02"),16);var v=new BigInteger(ASN1HEX.getVbyList(u,0,[1],"02"),16);return[y,v]}catch(w){throw"malformed DSA signature"}};function d(E,w,B,v,u,C){var z=KJUR.crypto.Util.hashString(w,E.toLowerCase());var z=z.substr(0,u.bitLength()/4);var A=new BigInteger(z,16);var y=n(BigInteger.ONE.add(BigInteger.ONE),u.subtract(BigInteger.ONE));var F=(B.modPow(y,v)).mod(u);var D=(y.modInverse(u).multiply(A.add(C.multiply(F)))).mod(u);var G=new Array();G[0]=F;G[1]=D;return G}function r(v){var u=openpgp.config.config.prefer_hash_algorithm;switch(Math.round(v.bitLength()/8)){case 20:if(u!=2&&u>11&&u!=10&&u<8){return 2}return u;case 28:if(u>11&&u<8){return 11}return u;case 32:if(u>10&&u<8){return 8}return u;default:util.print_debug("DSA select hash algorithm: returning null for an unknown length of q");return null}}this.select_hash_algorithm=r;function m(I,K,J,B,z,u,F,G){var C=KJUR.crypto.Util.hashString(B,I.toLowerCase());var C=C.substr(0,u.bitLength()/4);var D=new BigInteger(C,16);if(BigInteger.ZERO.compareTo(K)>0||K.compareTo(u)>0||BigInteger.ZERO.compareTo(J)>0||J.compareTo(u)>0){util.print_error("invalid DSA Signature");return null}var H=J.modInverse(u);var A=D.multiply(H).mod(u);var v=K.multiply(H).mod(u);var E=F.modPow(A,z).multiply(G.modPow(v,z)).mod(z).mod(u);return E.compareTo(K)==0}function a(z){var A=new BigInteger(z,primeCenterie);var y=j(q,512);var u=t(p,q,z);var v;do{v=new BigInteger(q.bitCount(),rand)}while(x.compareTo(BigInteger.ZERO)!=1&&x.compareTo(q)!=-1);var w=g.modPow(x,p);return{x:v,q:A,p:y,g:u,y:w}}function j(y,z,w){if(z%64!=0){return false}var u;var v;do{u=w(bitcount,true);v=u.subtract(BigInteger.ONE);u=u.subtract(v.remainder(y))}while(!u.isProbablePrime(primeCenterie)||u.bitLength()!=l);return u}function t(B,z,A,w){var u=B.subtract(BigInteger.ONE);var y=u.divide(z);var v;do{v=w(A)}while(v.compareTo(u)!=-1&&v.compareTo(BigInteger.ONE)!=1);return v.modPow(y,B)}function o(w,y,u){var v;do{v=u(y,false)}while(v.compareTo(w)!=-1&&v.compareTo(BigInteger.ZERO)!=1);return v}function i(v,w){k=o(v);var u=g.modPow(k,w).mod(v);return u}function h(B,w,y,v,z,u){var A=B(v);s=(w.modInverse(z).multiply(A.add(u.multiply(y)))).mod(z);return s}this.sign=d;this.verify=m;function n(w,u){if(u.compareTo(w)<=0){return}var v=u.subtract(w);var y=e(v.bitLength());while(y>v){y=e(v.bitLength())}return w.add(y)}function e(w){if(w<0){return null}var u=Math.floor((w+7)/8);var v=c(u);if(w%8>0){v=String.fromCharCode((Math.pow(2,w%8)-1)&v.charCodeAt(0))+v.substring(1)}return new BigInteger(f(v),16)}function c(w){var u="";for(var v=0;v<w;v++){u+=String.fromCharCode(b())}return u}function b(){var u=new Uint32Array(1);window.crypto.getRandomValues(u);return u[0]&255}function f(y){if(y==null){return""}var v=[];var w=y.length;var z=0;var u;while(z<w){u=y[z++].charCodeAt().toString(16);while(u.length<2){u="0"+u}v.push(""+u)}return v.join("")}this.getRandomBigIntegerInRange=n;this.getRandomBigInteger=e;this.getRandomBytes=c}; |