feature: S3C-1903 allow public reads on buckets

This change supports proving a whitelist of buckets that have public-read
canned acl set, to allow reads from anonymous users on objects without
having to explicitly set public-read acl on them.

lib/api/apiUtils/authorization/aclChecks.js

@@ -1,5 +1,9 @@
 const constants = require('../../../../constants');
 
+// whitelist buckets to allow public read on objects
+const publicReadBuckets = process.env.ALLOW_PUBLIC_READ_BUCKETS ?
+    process.env.ALLOW_PUBLIC_READ_BUCKETS.split(',') : [];
+
 function isBucketAuthorized(bucket, requestType, canonicalID) {
     // Check to see if user is authorized to perform a
     // particular action on bucket based on ACLs.
@@ -115,6 +119,16 @@ function isObjAuthorized(bucket, objectMD, requestType, canonicalID) {
             return true;
         }
     }
+
+    // allow public reads on buckets that are whitelisted for anonymous reads
+    // TODO: remove this after bucket policies are implemented
+    const bucketAcl = bucket.getAcl();
+    const allowPublicReads = publicReadBuckets.includes(bucket.getName()) &&
+        bucketAcl.Canned === 'public-read' &&
+        (requestType === 'objectGet' || requestType === 'objectHead');
+    if (allowPublicReads) {
+        return true;
+    }
     return false;
 }
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "s3",
-  "version": "7.4.0",
+  "version": "7.4.2",
   "description": "S3 connector",
   "main": "index.js",
   "engines": {
@@ -19,11 +19,11 @@
   },
   "homepage": "https://github.com/scality/S3#readme",
   "dependencies": {
-    "arsenal": "scality/Arsenal#879823c4",
+    "arsenal": "scality/Arsenal#hotfix/7.4.2",
     "async": "~2.5.0",
     "aws-sdk": "2.28.0",
     "azure-storage": "^2.1.0",
-    "bucketclient": "scality/bucketclient#b74165ac",
+    "bucketclient": "scality/bucketclient#hotfix/7.4.2",
     "commander": "^2.9.0",
     "diskusage": "0.2.4",
     "google-auto-auth": "^0.9.1",
@@ -31,19 +31,19 @@
     "mongodb": "^2.2.31",
     "node-uuid": "^1.4.3",
     "npm-run-all": "~4.0.2",
-    "sproxydclient": "scality/sproxydclient#6a391f8d",
-    "utapi": "scality/utapi#cd3324df",
+    "sproxydclient": "scality/sproxydclient#hotfix/7.4.2",
+    "utapi": "scality/utapi#hotfix/7.4.2",
     "utf8": "~2.1.1",
     "uuid": "^3.0.1",
-    "vaultclient": "scality/vaultclient#fbd9988d",
-    "werelogs": "scality/werelogs#0ff7ec82",
+    "vaultclient": "scality/vaultclient#hotfix/7.4.2",
+    "werelogs": "scality/werelogs#hotfix/7.4.2",
     "xml2js": "~0.4.16"
   },
   "devDependencies": {
     "bluebird": "^3.3.1",
     "eslint": "^2.4.0",
     "eslint-config-airbnb": "^6.0.0",
-    "eslint-config-scality": "scality/Guidelines#71a059ad",
+    "eslint-config-scality": "scality/Guidelines#hotfix/7.4.2",
     "ioredis": "2.4.0",
     "istanbul": "1.0.0-alpha.2",
     "istanbul-api": "1.0.0-alpha.13",
@@ -51,11 +51,11 @@
     "mocha": "^2.3.4",
     "mocha-junit-reporter": "1.11.1",
     "node-mocks-http": "1.5.2",
-    "s3blaster": "scality/s3blaster#7a836b6e",
+    "s3blaster": "scality/s3blaster#hotfix/7.4.2",
     "tv4": "^1.2.7"
   },
   "optionalDependencies": {
-    "cdmiclient": "scality/cdmiclient#9ff12c18"
+    "cdmiclient": "scality/cdmiclient#hotfix/7.4.2"
   },
   "scripts": {
     "ft_awssdk": "cd tests/functional/aws-node-sdk && mocha test/",