From 8ed180d8d19bf62ae05bc0508356f870fe8bf7f6 Mon Sep 17 00:00:00 2001 From: Abhinav Adduri Date: Thu, 22 Jun 2017 10:09:56 -0700 Subject: [PATCH] removing shim for more browser compatibility --- public/webcrypto-shim.js | 597 -------------------------------------- views/download.handlebars | 1 - views/index.handlebars | 1 - 3 files changed, 599 deletions(-) delete mode 100644 public/webcrypto-shim.js diff --git a/public/webcrypto-shim.js b/public/webcrypto-shim.js deleted file mode 100644 index 78b68c57..00000000 --- a/public/webcrypto-shim.js +++ /dev/null @@ -1,597 +0,0 @@ -/** - * @file Web Cryptography API shim - * @author Artem S Vybornov - * @license MIT - */ -!function ( global ) { - 'use strict'; - - if ( typeof Promise !== 'function' ) - throw "Promise support required"; - - var _crypto = global.crypto || global.msCrypto; - if ( !_crypto ) return; - - var _subtle = _crypto.subtle || _crypto.webkitSubtle; - if ( !_subtle ) return; - - var _Crypto = global.Crypto || _crypto.constructor || Object, - _SubtleCrypto = global.SubtleCrypto || _subtle.constructor || Object, - _CryptoKey = global.CryptoKey || global.Key || Object; - - var isIE = !!global.msCrypto, - isWebkit = !!_crypto.webkitSubtle; - if ( !isIE && !isWebkit ) return; - - function s2a ( s ) { - return btoa(s).replace(/\=+$/, '').replace(/\+/g, '-').replace(/\//g, '_'); - } - - function a2s ( s ) { - s += '===', s = s.slice( 0, -s.length % 4 ); - return atob( s.replace(/-/g, '+').replace(/_/g, '/') ); - } - - function s2b ( s ) { - var b = new Uint8Array(s.length); - for ( var i = 0; i < s.length; i++ ) b[i] = s.charCodeAt(i); - return b; - } - - function b2s ( b ) { - if ( b instanceof ArrayBuffer ) b = new Uint8Array(b); - return String.fromCharCode.apply( String, b ); - } - - function alg ( a ) { - var r = { 'name': (a.name || a || '').toUpperCase().replace('V','v') }; - switch ( r.name ) { - case 'SHA-1': - case 'SHA-256': - case 'SHA-384': - case 'SHA-512': - break; - case 'AES-CBC': - case 'AES-GCM': - case 'AES-KW': - if ( a.length ) r['length'] = a.length; - break; - case 'HMAC': - if ( a.hash ) r['hash'] = alg(a.hash); - if ( a.length ) r['length'] = a.length; - break; - case 'RSAES-PKCS1-v1_5': - if ( a.publicExponent ) r['publicExponent'] = new Uint8Array(a.publicExponent); - if ( a.modulusLength ) r['modulusLength'] = a.modulusLength; - break; - case 'RSASSA-PKCS1-v1_5': - case 'RSA-OAEP': - if ( a.hash ) r['hash'] = alg(a.hash); - if ( a.publicExponent ) r['publicExponent'] = new Uint8Array(a.publicExponent); - if ( a.modulusLength ) r['modulusLength'] = a.modulusLength; - break; - default: - throw new SyntaxError("Bad algorithm name"); - } - return r; - }; - - function jwkAlg ( a ) { - return { - 'HMAC': { - 'SHA-1': 'HS1', - 'SHA-256': 'HS256', - 'SHA-384': 'HS384', - 'SHA-512': 'HS512', - }, - 'RSASSA-PKCS1-v1_5': { - 'SHA-1': 'RS1', - 'SHA-256': 'RS256', - 'SHA-384': 'RS384', - 'SHA-512': 'RS512', - }, - 'RSAES-PKCS1-v1_5': { - '': 'RSA1_5', - }, - 'RSA-OAEP': { - 'SHA-1': 'RSA-OAEP', - 'SHA-256': 'RSA-OAEP-256', - }, - 'AES-KW': { - '128': 'A128KW', - '192': 'A192KW', - '256': 'A256KW', - }, - 'AES-GCM': { - '128': 'A128GCM', - '192': 'A192GCM', - '256': 'A256GCM', - }, - 'AES-CBC': { - '128': 'A128CBC', - '192': 'A192CBC', - '256': 'A256CBC', - }, - }[a.name][ ( a.hash || {} ).name || a.length || '' ]; - } - - function b2jwk ( k ) { - if ( k instanceof ArrayBuffer || k instanceof Uint8Array ) k = JSON.parse( decodeURIComponent( escape( b2s(k) ) ) ); - var jwk = { 'kty': k.kty, 'alg': k.alg, 'ext': k.ext || k.extractable }; - switch ( jwk.kty ) { - case 'oct': - jwk.k = k.k; - case 'RSA': - [ 'n', 'e', 'd', 'p', 'q', 'dp', 'dq', 'qi', 'oth' ].forEach( function ( x ) { if ( x in k ) jwk[x] = k[x] } ); - break; - default: - throw new TypeError("Unsupported key type"); - } - return jwk; - } - - function jwk2b ( k ) { - var jwk = b2jwk(k); - if ( isIE ) jwk['extractable'] = jwk.ext, delete jwk.ext; - return s2b( unescape( encodeURIComponent( JSON.stringify(jwk) ) ) ).buffer; - } - - function pkcs2jwk ( k ) { - var info = b2der(k), prv = false; - if ( info.length > 2 ) prv = true, info.shift(); // remove version from PKCS#8 PrivateKeyInfo structure - var jwk = { 'ext': true }; - switch ( info[0][0] ) { - case '1.2.840.113549.1.1.1': - var rsaComp = [ 'n', 'e', 'd', 'p', 'q', 'dp', 'dq', 'qi' ], - rsaKey = b2der( info[1] ); - if ( prv ) rsaKey.shift(); // remove version from PKCS#1 RSAPrivateKey structure - for ( var i = 0; i < rsaKey.length; i++ ) { - if ( !rsaKey[i][0] ) rsaKey[i] = rsaKey[i].subarray(1); - jwk[ rsaComp[i] ] = s2a( b2s( rsaKey[i] ) ); - } - jwk['kty'] = 'RSA'; - break; - default: - throw new TypeError("Unsupported key type"); - } - return jwk; - } - - function jwk2pkcs ( k ) { - var key, info = [ [ '', null ] ], prv = false; - switch ( k.kty ) { - case 'RSA': - var rsaComp = [ 'n', 'e', 'd', 'p', 'q', 'dp', 'dq', 'qi' ], - rsaKey = []; - for ( var i = 0; i < rsaComp.length; i++ ) { - if ( !( rsaComp[i] in k ) ) break; - var b = rsaKey[i] = s2b( a2s( k[ rsaComp[i] ] ) ); - if ( b[0] & 0x80 ) rsaKey[i] = new Uint8Array(b.length + 1), rsaKey[i].set( b, 1 ); - } - if ( rsaKey.length > 2 ) prv = true, rsaKey.unshift( new Uint8Array([0]) ); // add version to PKCS#1 RSAPrivateKey structure - info[0][0] = '1.2.840.113549.1.1.1'; - key = rsaKey; - break; - default: - throw new TypeError("Unsupported key type"); - } - info.push( new Uint8Array( der2b(key) ).buffer ); - if ( !prv ) info[1] = { 'tag': 0x03, 'value': info[1] }; - else info.unshift( new Uint8Array([0]) ); // add version to PKCS#8 PrivateKeyInfo structure - return new Uint8Array( der2b(info) ).buffer; - } - - var oid2str = { 'KoZIhvcNAQEB': '1.2.840.113549.1.1.1' }, - str2oid = { '1.2.840.113549.1.1.1': 'KoZIhvcNAQEB' }; - - function b2der ( buf, ctx ) { - if ( buf instanceof ArrayBuffer ) buf = new Uint8Array(buf); - if ( !ctx ) ctx = { pos: 0, end: buf.length }; - - if ( ctx.end - ctx.pos < 2 || ctx.end > buf.length ) throw new RangeError("Malformed DER"); - - var tag = buf[ctx.pos++], - len = buf[ctx.pos++]; - - if ( len >= 0x80 ) { - len &= 0x7f; - if ( ctx.end - ctx.pos < len ) throw new RangeError("Malformed DER"); - for ( var xlen = 0; len--; ) xlen <<= 8, xlen |= buf[ctx.pos++]; - len = xlen; - } - - if ( ctx.end - ctx.pos < len ) throw new RangeError("Malformed DER"); - - var rv; - - switch ( tag ) { - case 0x02: // Universal Primitive INTEGER - rv = buf.subarray( ctx.pos, ctx.pos += len ); - break; - case 0x03: // Universal Primitive BIT STRING - if ( buf[ctx.pos++] ) throw new Error( "Unsupported bit string" ); - len--; - case 0x04: // Universal Primitive OCTET STRING - rv = new Uint8Array( buf.subarray( ctx.pos, ctx.pos += len ) ).buffer; - break; - case 0x05: // Universal Primitive NULL - rv = null; - break; - case 0x06: // Universal Primitive OBJECT IDENTIFIER - var oid = btoa( b2s( buf.subarray( ctx.pos, ctx.pos += len ) ) ); - if ( !( oid in oid2str ) ) throw new Error( "Unsupported OBJECT ID " + oid ); - rv = oid2str[oid]; - break; - case 0x30: // Universal Constructed SEQUENCE - rv = []; - for ( var end = ctx.pos + len; ctx.pos < end; ) rv.push( b2der( buf, ctx ) ); - break; - default: - throw new Error( "Unsupported DER tag 0x" + tag.toString(16) ); - } - - return rv; - } - - function der2b ( val, buf ) { - if ( !buf ) buf = []; - - var tag = 0, len = 0, - pos = buf.length + 2; - - buf.push( 0, 0 ); // placeholder - - if ( val instanceof Uint8Array ) { // Universal Primitive INTEGER - tag = 0x02, len = val.length; - for ( var i = 0; i < len; i++ ) buf.push( val[i] ); - } - else if ( val instanceof ArrayBuffer ) { // Universal Primitive OCTET STRING - tag = 0x04, len = val.byteLength, val = new Uint8Array(val); - for ( var i = 0; i < len; i++ ) buf.push( val[i] ); - } - else if ( val === null ) { // Universal Primitive NULL - tag = 0x05, len = 0; - } - else if ( typeof val === 'string' && val in str2oid ) { // Universal Primitive OBJECT IDENTIFIER - var oid = s2b( atob( str2oid[val] ) ); - tag = 0x06, len = oid.length; - for ( var i = 0; i < len; i++ ) buf.push( oid[i] ); - } - else if ( val instanceof Array ) { // Universal Constructed SEQUENCE - for ( var i = 0; i < val.length; i++ ) der2b( val[i], buf ); - tag = 0x30, len = buf.length - pos; - } - else if ( typeof val === 'object' && val.tag === 0x03 && val.value instanceof ArrayBuffer ) { // Tag hint - val = new Uint8Array(val.value), tag = 0x03, len = val.byteLength; - buf.push(0); for ( var i = 0; i < len; i++ ) buf.push( val[i] ); - len++; - } - else { - throw new Error( "Unsupported DER value " + val ); - } - - if ( len >= 0x80 ) { - var xlen = len, len = 4; - buf.splice( pos, 0, (xlen >> 24) & 0xff, (xlen >> 16) & 0xff, (xlen >> 8) & 0xff, xlen & 0xff ); - while ( len > 1 && !(xlen >> 24) ) xlen <<= 8, len--; - if ( len < 4 ) buf.splice( pos, 4 - len ); - len |= 0x80; - } - - buf.splice( pos - 2, 2, tag, len ); - - return buf; - } - - function CryptoKey ( key, alg, ext, use ) { - Object.defineProperties( this, { - _key: { - value: key - }, - type: { - value: key.type, - enumerable: true, - }, - extractable: { - value: (ext === undefined) ? key.extractable : ext, - enumerable: true, - }, - algorithm: { - value: (alg === undefined) ? key.algorithm : alg, - enumerable: true, - }, - usages: { - value: (use === undefined) ? key.usages : use, - enumerable: true, - }, - }); - } - - function isPubKeyUse ( u ) { - return u === 'verify' || u === 'encrypt' || u === 'wrapKey'; - } - - function isPrvKeyUse ( u ) { - return u === 'sign' || u === 'decrypt' || u === 'unwrapKey'; - } - - [ 'generateKey', 'importKey', 'unwrapKey' ] - .forEach( function ( m ) { - var _fn = _subtle[m]; - - _subtle[m] = function ( a, b, c ) { - var args = [].slice.call(arguments), - ka, kx, ku; - - switch ( m ) { - case 'generateKey': - ka = alg(a), kx = b, ku = c; - break; - case 'importKey': - ka = alg(c), kx = args[3], ku = args[4]; - if ( a === 'jwk' ) { - b = b2jwk(b); - if ( !b.alg ) b.alg = jwkAlg(ka); - if ( !b.key_ops ) b.key_ops = ( b.kty !== 'oct' ) ? ( 'd' in b ) ? ku.filter(isPrvKeyUse) : ku.filter(isPubKeyUse) : ku.slice(); - args[1] = jwk2b(b); - } - break; - case 'unwrapKey': - ka = args[4], kx = args[5], ku = args[6]; - args[2] = c._key; - break; - } - - if ( m === 'generateKey' && ka.name === 'HMAC' && ka.hash ) { - ka.length = ka.length || { 'SHA-1': 512, 'SHA-256': 512, 'SHA-384': 1024, 'SHA-512': 1024 }[ka.hash.name]; - return _subtle.importKey( 'raw', _crypto.getRandomValues( new Uint8Array( (ka.length+7)>>3 ) ), ka, kx, ku ); - } - - if ( isWebkit && m === 'generateKey' && ka.name === 'RSASSA-PKCS1-v1_5' && ( !ka.modulusLength || ka.modulusLength >= 2048 ) ) { - a = alg(a), a.name = 'RSAES-PKCS1-v1_5', delete a.hash; - return _subtle.generateKey( a, true, [ 'encrypt', 'decrypt' ] ) - .then( function ( k ) { - return Promise.all([ - _subtle.exportKey( 'jwk', k.publicKey ), - _subtle.exportKey( 'jwk', k.privateKey ), - ]); - }) - .then( function ( keys ) { - keys[0].alg = keys[1].alg = jwkAlg(ka); - keys[0].key_ops = ku.filter(isPubKeyUse), keys[1].key_ops = ku.filter(isPrvKeyUse); - return Promise.all([ - _subtle.importKey( 'jwk', keys[0], ka, kx, keys[0].key_ops ), - _subtle.importKey( 'jwk', keys[1], ka, kx, keys[1].key_ops ), - ]); - }) - .then( function ( keys ) { - return { - publicKey: keys[0], - privateKey: keys[1], - }; - }); - } - - if ( ( isWebkit || ( isIE && ( ka.hash || {} ).name === 'SHA-1' ) ) - && m === 'importKey' && a === 'jwk' && ka.name === 'HMAC' && b.kty === 'oct' ) { - return _subtle.importKey( 'raw', s2b( a2s(b.k) ), c, args[3], args[4] ); - } - - if ( isWebkit && m === 'importKey' && ( a === 'spki' || a === 'pkcs8' ) ) { - return _subtle.importKey( 'jwk', pkcs2jwk(b), c, args[3], args[4] ); - } - - if ( isIE && m === 'unwrapKey' ) { - return _subtle.decrypt( args[3], c, b ) - .then( function ( k ) { - return _subtle.importKey( a, k, args[4], args[5], args[6] ); - }); - } - - var op; - try { - op = _fn.apply( _subtle, args ); - } - catch ( e ) { - return Promise.reject(e); - } - - if ( isIE ) { - op = new Promise( function ( res, rej ) { - op.onabort = - op.onerror = function ( e ) { rej(e) }; - op.oncomplete = function ( r ) { res(r.target.result) }; - }); - } - - op = op.then( function ( k ) { - if ( ka.name === 'HMAC' ) { - if ( !ka.length ) ka.length = 8 * k.algorithm.length; - } - if ( ka.name.search('RSA') == 0 ) { - if ( !ka.modulusLength ) ka.modulusLength = (k.publicKey || k).algorithm.modulusLength; - if ( !ka.publicExponent ) ka.publicExponent = (k.publicKey || k).algorithm.publicExponent; - } - if ( k.publicKey && k.privateKey ) { - k = { - publicKey: new CryptoKey( k.publicKey, ka, kx, ku.filter(isPubKeyUse) ), - privateKey: new CryptoKey( k.privateKey, ka, kx, ku.filter(isPrvKeyUse) ), - }; - } - else { - k = new CryptoKey( k, ka, kx, ku ); - } - return k; - }); - - return op; - } - }); - - [ 'exportKey', 'wrapKey' ] - .forEach( function ( m ) { - var _fn = _subtle[m]; - - _subtle[m] = function ( a, b, c ) { - var args = [].slice.call(arguments); - - switch ( m ) { - case 'exportKey': - args[1] = b._key; - break; - case 'wrapKey': - args[1] = b._key, args[2] = c._key; - break; - } - - if ( ( isWebkit || ( isIE && ( b.algorithm.hash || {} ).name === 'SHA-1' ) ) - && m === 'exportKey' && a === 'jwk' && b.algorithm.name === 'HMAC' ) { - args[0] = 'raw'; - } - - if ( isWebkit && m === 'exportKey' && ( a === 'spki' || a === 'pkcs8' ) ) { - args[0] = 'jwk'; - } - - if ( isIE && m === 'wrapKey' ) { - return _subtle.exportKey( a, b ) - .then( function ( k ) { - if ( a === 'jwk' ) k = s2b( unescape( encodeURIComponent( JSON.stringify( b2jwk(k) ) ) ) ); - return _subtle.encrypt( args[3], c, k ); - }); - } - - var op; - try { - op = _fn.apply( _subtle, args ); - } - catch ( e ) { - return Promise.reject(e); - } - - if ( isIE ) { - op = new Promise( function ( res, rej ) { - op.onabort = - op.onerror = function ( e ) { rej(e) }; - op.oncomplete = function ( r ) { res(r.target.result) }; - }); - } - - if ( m === 'exportKey' && a === 'jwk' ) { - op = op.then( function ( k ) { - if ( ( isWebkit || ( isIE && ( b.algorithm.hash || {} ).name === 'SHA-1' ) ) - && b.algorithm.name === 'HMAC') { - return { 'kty': 'oct', 'alg': jwkAlg(b.algorithm), 'key_ops': b.usages.slice(), 'ext': true, 'k': s2a( b2s(k) ) }; - } - k = b2jwk(k); - if ( !k.alg ) k['alg'] = jwkAlg(b.algorithm); - if ( !k.key_ops ) k['key_ops'] = ( b.type === 'public' ) ? b.usages.filter(isPubKeyUse) : ( b.type === 'private' ) ? b.usages.filter(isPrvKeyUse) : b.usages.slice(); - return k; - }); - } - - if ( isWebkit && m === 'exportKey' && ( a === 'spki' || a === 'pkcs8' ) ) { - op = op.then( function ( k ) { - k = jwk2pkcs( b2jwk(k) ); - return k; - }); - } - - return op; - } - }); - - [ 'encrypt', 'decrypt', 'sign', 'verify' ] - .forEach( function ( m ) { - var _fn = _subtle[m]; - - _subtle[m] = function ( a, b, c, d ) { - if ( isIE && ( !c.byteLength || ( d && !d.byteLength ) ) ) - throw new Error("Empy input is not allowed"); - - var args = [].slice.call(arguments), - ka = alg(a); - - if ( isIE && m === 'decrypt' && ka.name === 'AES-GCM' ) { - var tl = a.tagLength >> 3; - args[2] = (c.buffer || c).slice( 0, c.byteLength - tl ), - a.tag = (c.buffer || c).slice( c.byteLength - tl ); - } - - args[1] = b._key; - - var op; - try { - op = _fn.apply( _subtle, args ); - } - catch ( e ) { - return Promise.reject(e); - } - - if ( isIE ) { - op = new Promise( function ( res, rej ) { - op.onabort = - op.onerror = function ( e ) { - rej(e); - }; - - op.oncomplete = function ( r ) { - var r = r.target.result; - - if ( m === 'encrypt' && r instanceof AesGcmEncryptResult ) { - var c = r.ciphertext, t = r.tag; - r = new Uint8Array( c.byteLength + t.byteLength ); - r.set( new Uint8Array(c), 0 ); - r.set( new Uint8Array(t), c.byteLength ); - r = r.buffer; - } - - res(r); - }; - }); - } - - return op; - } - }); - - if ( isIE ) { - var _digest = _subtle.digest; - - _subtle['digest'] = function ( a, b ) { - if ( !b.byteLength ) - throw new Error("Empy input is not allowed"); - - var op; - try { - op = _digest.call( _subtle, a, b ); - } - catch ( e ) { - return Promise.reject(e); - } - - op = new Promise( function ( res, rej ) { - op.onabort = - op.onerror = function ( e ) { rej(e) }; - op.oncomplete = function ( r ) { res(r.target.result) }; - }); - - return op; - }; - - global.crypto = Object.create( _crypto, { - getRandomValues: { value: function ( a ) { return _crypto.getRandomValues(a) } }, - subtle: { value: _subtle }, - }); - - global.CryptoKey = CryptoKey; - } - - if ( isWebkit ) { - _crypto.subtle = _subtle; - - global.Crypto = _Crypto; - global.SubtleCrypto = _SubtleCrypto; - global.CryptoKey = CryptoKey; - } -}(this); diff --git a/views/download.handlebars b/views/download.handlebars index ce7c2a90..acbb1056 100644 --- a/views/download.handlebars +++ b/views/download.handlebars @@ -2,7 +2,6 @@ Download your file - diff --git a/views/index.handlebars b/views/index.handlebars index 45a979ad..8aa9df68 100644 --- a/views/index.handlebars +++ b/views/index.handlebars @@ -2,7 +2,6 @@ Firefox Fileshare -