diff --git a/extensions/amp-analytics/0.1/crypto-impl.js b/extensions/amp-analytics/0.1/crypto-impl.js index d7609acd8e56..eab37fdb6bb1 100644 --- a/extensions/amp-analytics/0.1/crypto-impl.js +++ b/extensions/amp-analytics/0.1/crypto-impl.js @@ -16,31 +16,81 @@ import * as lib from '../../../third_party/closure-library/sha384-generated'; import {getService} from '../../../src/service'; +import {dev} from '../../../src/log'; + +/** @const {string} */ +const TAG = 'Crypto'; export class Crypto { constructor(win) { - this.win = win; + /** @private @const {?SubtleCrypto} */ + this.subtle_ = getSubtle(win); } /** - * Returns the SHA-384 hash of the input string in an ArrayBuffer. + * Returns the SHA-384 hash of the input string in a number array. + * Input string cannot contain chars out of range [0,255]. * @param {string} str - * @returns {!Promise} + * @returns {!Promise>} + * @throws {!Error} when input string contains chars out of range [0,255] */ sha384(str) { + if (this.subtle_) { + try { + return this.subtle_.digest('SHA-384', str2ab(str)) + // [].slice.call(Unit8Array) is a shim for Array.from(Unit8Array) + .then(buffer => [].slice.call(new Uint8Array(buffer)), + e => { + dev.info(TAG, 'Crypto digest promise has rejected, ' + + 'fallback to closure lib.', e); + return lib.sha384(str); + }); + } catch (e) { + dev.info(TAG, 'Crypto digest has thrown, fallback to closure lib.', e); + } + } return Promise.resolve(lib.sha384(str)); } /** * Returns the SHA-384 hash of the input string in the format of web safe - * base64 string (using -_. instead of +/=). + * base64 (using -_. instead of +/=). + * Input string cannot contain chars out of range [0,255]. * @param {string} str * @returns {!Promise} + * @throws {!Error} when input string contains chars out of range [0,255] */ sha384Base64(str) { - return Promise.resolve(lib.sha384Base64(str)); + return this.sha384(str).then(buffer => { + return lib.base64(buffer); + }); + } +} + +function getSubtle(win) { + if (!win.crypto) { + return null; + } + return win.crypto.subtle || win.crypto.webkitSubtle || null; +} + +/** + * Convert a string to Unit8Array. A shim for TextEncoder. + * @param {string} str + * @returns {!Uint8Array} + */ +function str2ab(str) { + const buf = new Uint8Array(str.length); + for (let i = 0; i < str.length; i++) { + // Apply the same check as in closure lib: + // https://github.com/google/closure-library/blob/master/closure/goog/crypt/sha2_64bit.js#L169 + if (str.charCodeAt(i) > 255) { + throw Error('Characters must be in range [0,255]'); + } + buf[i] = str.charCodeAt(i); } + return buf; } export function installCryptoService(win) { diff --git a/extensions/amp-analytics/0.1/test/test-crypto-impl.js b/extensions/amp-analytics/0.1/test/test-crypto-impl.js index 2a12d3a5f293..5902761a1dc3 100644 --- a/extensions/amp-analytics/0.1/test/test-crypto-impl.js +++ b/extensions/amp-analytics/0.1/test/test-crypto-impl.js @@ -15,31 +15,86 @@ */ import {Crypto} from '../crypto-impl'; +import {Platform} from '../../../../src/platform'; +import * as lib from '../../../../third_party/closure-library/sha384-generated'; +import * as sinon from 'sinon'; describe('crypto-impl', () => { - let crypto; + function testSuite(descption, crypto) { + describe(descption, () => { + it('should hash "abc" in sha384', () => { + return crypto.sha384('abc').then(buffer => { + expect(buffer.length).to.equal(48); + expect(buffer[0]).to.equal(203); + expect(buffer[1]).to.equal(0); + expect(buffer[47]).to.equal(167); + }); + }); - beforeEach(() => { - crypto = new Crypto({}); - }); + it('should hash "abc" in sha384Base64', () => { + return expect(crypto.sha384Base64('abc')).to.eventually.equal( + 'ywB1P0WjXou1oD1pmsZQBycsMqsO3tFjGotgWkP_W-2AhgcroefMI1i67KE0yCWn'); + }); + + it('should hash "foobar" in sha384Base64', () => { + return expect(crypto.sha384Base64('foobar')).to.eventually.equal( + 'PJww2fZl501RXIQpYNSkUcg6ASX9Pec5LXs3IxrxDHLqWK7fzfiaV2W_kCr5Ps8G'); + }); - it('should hash "abc" in sha384', () => { - return crypto.sha384('abc').then(buffer => { - expect(buffer.length).to.equal(48); - expect(buffer[0]).to.equal(203); - expect(buffer[1]).to.equal(0); - expect(buffer[47]).to.equal(167); + it('should throw when input contains chars out of range [0,255]', () => { + expect(() => crypto.sha384('abc今')).to.throw(); + expect(() => crypto.sha384Base64('abc今')).to.throw(); + }); }); - }); + } - it('should hash "abc" in sha384Base64', () => { - return expect(crypto.sha384Base64('abc')).to.eventually.equal( - 'ywB1P0WjXou1oD1pmsZQBycsMqsO3tFjGotgWkP_W-2AhgcroefMI1i67KE0yCWn'); - }); + function isModernChrome() { + const platform = new Platform(window); + return platform.isChrome() && platform.getMajorVersion() >= 45; + } - it('should hash "foobar" in sha384Base64', () => { - return expect(crypto.sha384Base64('foobar')).to.eventually.equal( - 'PJww2fZl501RXIQpYNSkUcg6ASX9Pec5LXs3IxrxDHLqWK7fzfiaV2W_kCr5Ps8G'); + testSuite('with native crypto API', new Crypto(window)); + testSuite('with crypto lib', new Crypto({})); + testSuite('with native crypto API rejects', new Crypto({ + crypto: { + subtle: { + digest: () => Promise.reject('Operation not supported'), + }, + }, + })); + testSuite('with native crypto API throws', new Crypto({ + crypto: { + subtle: { + digest: () => { + throw new Error(); + }, + }, + }, + })); + + it('native API result should exactly equal to crypto lib result', () => { + return Promise + .all([new Crypto(window).sha384('abc'), new Crypto({}).sha384('abc')]) + .then(results => { + expect(results[0]).to.jsonEqual(results[1]); + }); }); + + // Run this test only on browsers that we're confident about the existence + // of native Crypto API. + if (isModernChrome()) { + it('should not call closure lib when native API is available', () => { + const sandbox = sinon.sandbox.create(); + const nativeApiSpy = sandbox.spy(window.crypto.subtle, 'digest'); + const libSpy = sandbox.spy(lib, 'sha384'); + return new Crypto(window).sha384Base64('abc').then(hash => { + expect(hash).to.equal( + 'ywB1P0WjXou1oD1pmsZQBycsMqsO3tFjGotgWkP_W-2AhgcroefMI1i67KE0yCWn'); + expect(nativeApiSpy).to.have.been.calledOnce; + expect(libSpy).to.not.have.been.called; + }); + sandbox.restore(); + }); + } }); diff --git a/third_party/closure-library/compile.sh b/third_party/closure-library/compile.sh index 93826bc13ccc..a321e2bad659 100644 --- a/third_party/closure-library/compile.sh +++ b/third_party/closure-library/compile.sh @@ -26,9 +26,10 @@ java -jar $1 \ --js "$2/goog/debug/error.js" \ --js "$2/goog/dom/nodetype.js" \ --js "$2/goog/math/long.js" \ + --js "$2/goog/reflect/reflect.js" \ --js "$2/goog/string/string.js" \ --js_output_file "sha384-generated.js" \ - --output_wrapper "/* Generated from closure library commit $GIT_COMMIT */%output%;export function sha384Base64(input) { return ampSha384(input) }; export function sha384(input) { return ampSha384Digest(input) };" \ + --output_wrapper "/* Generated from closure library commit $GIT_COMMIT */%output%;export function base64(input) { return ampBase64(input) }; export function sha384(input) { return ampSha384Digest(input) };" \ --manage_closure_dependencies \ --process_closure_primitives \ --use_types_for_optimization \ diff --git a/third_party/closure-library/sha384-generated.js b/third_party/closure-library/sha384-generated.js index 60de003177e8..e2676e92c1af 100644 --- a/third_party/closure-library/sha384-generated.js +++ b/third_party/closure-library/sha384-generated.js @@ -1,19 +1,20 @@ -/* Generated from closure library commit 4fa3f37e090d73374825faec334b2deb2c902c47 */var m=this;function p(a,b){var d=a.split("."),c=window||m;d[0]in c||!c.execScript||c.execScript("var "+d[0]);for(var e;d.length&&(e=d.shift());)d.length||void 0===b?c[e]?c=c[e]:c=c[e]={}:c[e]=b} -function aa(a){var b=typeof a;if("object"==b)if(a){if(a instanceof Array)return"array";if(a instanceof Object)return b;var d=Object.prototype.toString.call(a);if("[object Window]"==d)return"object";if("[object Array]"==d||"number"==typeof a.length&&"undefined"!=typeof a.splice&&"undefined"!=typeof a.propertyIsEnumerable&&!a.propertyIsEnumerable("splice"))return"array";if("[object Function]"==d||"undefined"!=typeof a.call&&"undefined"!=typeof a.propertyIsEnumerable&&!a.propertyIsEnumerable("call"))return"function"}else return"null"; 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+function U(a,b,c){c=void 0!==c?c:b.length;if(a.i)throw Error("this hasher needs to be reset");var d=a.f;if("string"==typeof b)for(var e=0;ef||255d;d++){var e=8*d;c[d]=new u(b[e+4]<<24|b[e+5]<<16|b[e+6]<<8|b[e+7],b[e]<<24|b[e+1]<<16|b[e+2]<<8|b[e+3])}for(d=16;80>d;d++){var e=c[d-15],b=e.b,e=e.a,f=c[d-2],g=f.b,f=f.a;c[d]=a.m(c[d-16],c[d-7],new u(b>>>1^e<<31^b>>>8^e<<24^b>>>7^e<<25,e>>>1^b<<31^e>>>8^b<<24^e>>>7),new u(g>>>19^f<<13^f>>>29^g<<3^g>>>6^f<<26,f>>>19^g<<13^g>>>29^f<<3^f>>>6))}for(var b=a.c[0],e=a.c[1],g=a.c[2],f=a.c[3],h=a.c[4],p=a.c[5],n=a.c[6],v=a.c[7],d=0;80>d;d++)var t=b.b,q=b.a,t=L(new u(t>>> +28^q<<4^q>>>2^t<<30^q>>>7^t<<25,q>>>28^t<<4^t>>>2^q<<30^t>>>7^q<<25),new u(b.b&e.b|e.b&g.b|b.b&g.b,b.a&e.a|e.a&g.a|b.a&g.a)),q=h.b,E=h.a,Y=h.b,Z=h.a,q=a.m(v,new u(q>>>14^E<<18^q>>>18^E<<14^E>>>9^q<<23,E>>>14^q<<18^E>>>18^q<<14^q>>>9^E<<23),new u(Y&p.b|~Y&n.b,Z&p.a|~Z&n.a),ka[d],c[d]),v=n,n=p,p=h,h=L(f,q),f=g,g=e,e=b,b=L(q,t);a.c[0]=L(a.c[0],b);a.c[1]=L(a.c[1],e);a.c[2]=L(a.c[2],g);a.c[3]=L(a.c[3],f);a.c[4]=L(a.c[4],h);a.c[5]=L(a.c[5],p);a.c[6]=L(a.c[6],n);a.c[7]=L(a.c[7],v)} +P.prototype.m=function(a,b,c){for(var d=(a.b^2147483648)+(b.b^2147483648),e=a.a+b.a,f=arguments.length-1;2<=f;--f)d+=arguments[f].b^2147483648,e+=arguments[f].a;arguments.length&1&&(d+=2147483648);e+=arguments.length>>1;e+=Math.floor(d/4294967296);return new u(d,e)};function Q(a){for(var b=[],c=0;cb.f?Y(b,ia,112-b.f):Y(b,ia,b.g-b.f+112);for(a=127;112<=a;a--)b.h[a]=d&255,d/=256;Z(b);var d=0,c=Array(8*b.l);for(a=0;a>g&255;for(g=24;0<=g;g-=8)c[d++]=e>>g&255}b.i=!0;return c} -p("ampSha384",function(a){a=ma(a);if(!U){U={};V={};for(var b=0;65>b;b++)U[b]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=".charAt(b),V[b]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.".charAt(b)}for(var b=V,d=[],c=0;c>2,e=(e&3)<<4|g>>4,g=(g&15)<<2|n>>6,n=n&63;l||(n=64,f||(g=64));d.push(b[q],b[e],b[g],b[n])}return d.join("")});p("ampSha384Digest",ma);;export function sha384Base64(input) { return ampSha384(input) }; export function sha384(input) { return ampSha384Digest(input) }; +289380356,3203993006,460393269,320620315,685471733,587496836,852142971,1086792851,1017036298,365543100,1126000580,2618297676,1288033470,3409855158,1501505948,4234509866,1607167915,987167468,1816402316,1246189591]);function la(){P.call(this,6,ma)}m(la,P);var ma=[3418070365,3238371032,1654270250,914150663,2438529370,812702999,355462360,4144912697,1731405415,4290775857,2394180231,1750603025,3675008525,1694076839,1203062813,3204075428];var W=null,X=null;l("ampBase64",function(a){if(!W){W={};X={};for(var b=0;65>b;b++)W[b]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=".charAt(b),X[b]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.".charAt(b)}for(var b=X,c=[],d=0;d>2,e=(e&3)<<4|g>>4,g=(g&15)<<2|p>>6,p=p&63;h||(p=64,f||(g=64));c.push(b[n],b[e],b[g],b[p])}return c.join("")}); +l("ampSha384Digest",function(a){var b=new la;U(b,a);if(b.i)throw Error("this hasher needs to be reset");var c=8*b.j;112>b.f?U(b,T,112-b.f):U(b,T,b.g-b.f+112);for(a=127;112<=a;a--)b.h[a]=c&255,c/=256;V(b);var c=0,d=Array(8*b.l);for(a=0;a>g&255;for(g=24;0<=g;g-=8)d[c++]=e>>g&255}b.i=!0;return d});;export function base64(input) { return ampBase64(input) }; export function sha384(input) { return ampSha384Digest(input) }; diff --git a/third_party/closure-library/sha384.js b/third_party/closure-library/sha384.js index 7124e6412286..0ba7bcb767b8 100644 --- a/third_party/closure-library/sha384.js +++ b/third_party/closure-library/sha384.js @@ -28,12 +28,12 @@ var digest = function(input) { } /** - * @param {!Uint8Array|string} input The value to hash. + * @param {!Uint8Array} input The value to hash. * @return {string} Web safe base64 of the digest of the input string. */ -var base64Digest = function(input) { - return goog.crypt.base64.encodeByteArray(digest(input), /* websafe */ true); +var base64 = function(input) { + return goog.crypt.base64.encodeByteArray(input, /* websafe */ true); } -goog.exportSymbol('ampSha384', base64Digest, window); +goog.exportSymbol('ampBase64', base64, window); goog.exportSymbol('ampSha384Digest', digest, window);