dsa-2.0.min.js

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.isPrivate=false;this.isPublic=false;this.setPrivate=function(d,c,b,e,a){this.isPrivate=true;this.p=d;this.q=c;this.g=b;this.y=e;this.x=a};this.setPrivateHex=function(d,b,f,i,j){var c,a,e,g,h;c=new BigInteger(d,16);a=new BigInteger(b,16);e=new BigInteger(f,16);if(typeof i==="string"&&i.length>1){g=new BigInteger(i,16)}else{g=null}h=new BigInteger(j,16);this.setPrivate(c,a,e,g,h)};this.setPublic=function(c,b,a,d){this.isPublic=true;this.p=c;this.q=b;this.g=a;this.y=d;this.x=null};this.setPublicHex=function(f,e,d,g){var b,a,h,c;b=new BigInteger(f,16);a=new BigInteger(e,16);h=new BigInteger(d,16);c=new BigInteger(g,16);this.setPublic(b,a,h,c)};this.signWithMessageHash=function(d){var c=this.p;var b=this.q;var f=this.g;var i=this.y;var j=this.x;var e=KJUR.crypto.Util.getRandomBigIntegerMinToMax(BigInteger.ONE.add(BigInteger.ONE),b.subtract(BigInteger.ONE));var l=d.substr(0,b.bitLength()/4);var h=new BigInteger(l,16);var a=(f.modPow(e,c)).mod(b);var n=(e.modInverse(b).multiply(h.add(j.multiply(a)))).mod(b);var m=KJUR.asn1.ASN1Util.jsonToASN1HEX({seq:[{"int":{bigint:a}},{"int":{bigint:n}}]});return m};this.verifyWithMessageHash=function(h,f){var d=this.p;var b=this.q;var j=this.g;var l=this.y;var i=this.parseASN1Signature(f);var a=i[0];var t=i[1];var o=h.substr(0,b.bitLength()/4);var k=new BigInteger(o,16);if(BigInteger.ZERO.compareTo(a)>0||a.compareTo(b)>0){throw"invalid DSA signature"}if(BigInteger.ZERO.compareTo(t)>=0||t.compareTo(b)>0){throw"invalid DSA signature"}var m=t.modInverse(b);var e=k.multiply(m).mod(b);var c=a.multiply(m).mod(b);var n=j.modPow(e,d).multiply(l.modPow(c,d)).mod(d).mod(b);return n.compareTo(a)==0};this.parseASN1Signature=function(a){try{var d=new BigInteger(ASN1HEX.getVbyList(a,0,[0],"02"),16);var c=new BigInteger(ASN1HEX.getVbyList(a,0,[1],"02"),16);return[d,c]}catch(b){throw"malformed ASN.1 DSA signature"}};this.readPKCS5PrvKeyHex=function(c){var b,a,f,g,i;var j=ASN1HEX;var d=j.getVbyList;if(j.isASN1HEX(c)===false){throw"not ASN.1 hex string"}try{b=d(c,0,[1],"02");a=d(c,0,[2],"02");f=d(c,0,[3],"02");g=d(c,0,[4],"02");i=d(c,0,[5],"02")}catch(e){console.log("EXCEPTION:"+e);throw"malformed PKCS#1/5 plain DSA private key"}this.setPrivateHex(b,a,f,g,i)};this.readPKCS8PrvKeyHex=function(d){var f,c,b,g;var e=ASN1HEX;var i=e.getVbyList;if(e.isASN1HEX(d)===false){throw"not ASN.1 hex string"}try{f=i(d,0,[1,1,0],"02");c=i(d,0,[1,1,1],"02");b=i(d,0,[1,1,2],"02");g=i(d,0,[2,0],"02")}catch(a){console.log("EXCEPTION:"+a);throw"malformed PKCS#8 plain DSA private key"}this.setPrivateHex(f,c,b,null,g)};this.readPKCS8PubKeyHex=function(d){var f,c,b,g;var e=ASN1HEX;var i=e.getVbyList;if(e.isASN1HEX(d)===false){throw"not ASN.1 hex string"}try{f=i(d,0,[0,1,0],"02");c=i(d,0,[0,1,1],"02");b=i(d,0,[0,1,2],"02");g=i(d,0,[1,0],"02")}catch(a){console.log("EXCEPTION:"+a);throw"malformed PKCS#8 DSA public key"}this.setPublicHex(f,c,b,g)};this.readCertPubKeyHex=function(c,f){if(f!==5){f=6}var b,a,g,i;var j=ASN1HEX;var d=j.getVbyList;if(j.isASN1HEX(c)===false){throw"not ASN.1 hex string"}try{b=d(c,0,[0,f,0,1,0],"02");a=d(c,0,[0,f,0,1,1],"02");g=d(c,0,[0,f,0,1,2],"02");i=d(c,0,[0,f,1,0],"02")}catch(e){console.log("EXCEPTION:"+e);throw"malformed X.509 certificate DSA public key"}this.setPublicHex(b,a,g,i)}};