Fixing lints and params

…denies

lib/api/api.js

@@ -107,6 +107,7 @@ const api = {
         // no need to check auth on website or cors preflight requests
         if (apiMethod === 'websiteGet' || apiMethod === 'websiteHead' ||
         apiMethod === 'corsPreflight') {
+            request.actionImplicitDenies = false;
             return this[apiMethod](request, log, callback);
         }
 
@@ -129,15 +130,25 @@ const api = {
 
         const requestContexts = prepareRequestContexts(apiMethod, request,
             sourceBucket, sourceObject, sourceVersionId);
+        // Extract all the _apiMethods and store them in an array
+        const apiMethods = requestContexts ? requestContexts.map(context => context._apiMethod) : [];
+        // Attach the names to the current request
+        // eslint-disable-next-line no-param-reassign
+        request.apiMethods = apiMethods;
 
         function checkAuthResults(authResults) {
             let returnTagCount = true;
+            const isImplicitDeny = {};
+            let isOnlyImplicitDeny = true;
             if (apiMethod === 'objectGet') {
                 // first item checks s3:GetObject(Version) action
-                if (!authResults[0].isAllowed) {
+                if (!authResults[0].isAllowed && !authResults[0].isImplicit) {
                     log.trace('get object authorization denial from Vault');
                     return errors.AccessDenied;
                 }
+                // TODO add support for returnTagCount in the bucket policy
+                // checks
+                isImplicitDeny[authResults[0].action] = authResults[0].isImplicit;
                 // second item checks s3:GetObject(Version)Tagging action
                 if (!authResults[1].isAllowed) {
                     log.trace('get tagging authorization denial ' +
@@ -146,13 +157,25 @@ const api = {
                 }
             } else {
                 for (let i = 0; i < authResults.length; i++) {
-                    if (!authResults[i].isAllowed) {
+                    isImplicitDeny[authResults[i].action] = true;
+                    if (!authResults[i].isAllowed && !authResults[i].isImplicit) {
+                        // Any explicit deny rejects the current API call
                         log.trace('authorization denial from Vault');
                         return errors.AccessDenied;
+                    } else if (authResults[i].isAllowed) {
+                        // If the action is allowed, the result is not implicit
+                        // Deny.
+                        isImplicitDeny[authResults[i].action] = false;
+                        isOnlyImplicitDeny = false;
                     }
                 }
             }
-            return returnTagCount;
+            // These two APIs cannot use ACLs or Bucket Policies, hence, any
+            // implicit deny from vault must be treated as an explicit deny.
+            if ((apiMethod === 'bucketPut' || apiMethod === 'serviceGet') && isOnlyImplicitDeny) {
+                return errors.AccessDenied;
+            }
+            return { returnTagCount, isImplicitDeny };
         }
 
         return async.waterfall([
@@ -230,7 +253,16 @@ const api = {
                 if (checkedResults instanceof Error) {
                     return callback(checkedResults);
                 }
-                returnTagCount = checkedResults;
+                returnTagCount = checkedResults.returnTagCount;
+                request.actionImplicitDenies = checkedResults.isImplicitDeny;
+            } else {
+                // create an object of keys apiMethods with all values to false:
+                // for backward compatibility, all apiMethods are allowed by default
+                // thus it is explicitly allowed, so implicit deny is false
+                request.actionImplicitDenies = apiMethods.reduce((acc, curr) => {
+                    acc[curr] = false;
+                    return acc;
+                }, {});
             }
             if (apiMethod === 'objectPut' || apiMethod === 'objectPutPart') {
                 request._response = response;

lib/api/apiUtils/authorization/permissionChecks.js

@@ -1,20 +1,41 @@
 const { evaluators, actionMaps, RequestContext } = require('arsenal').policies;
 const constants = require('../../../../constants');
 
-const { allAuthedUsersId, bucketOwnerActions, logId, publicId,
+const {
-    assumedRoleArnResourceType, backbeatLifecycleSessionName } = constants;
+    allAuthedUsersId, bucketOwnerActions, logId, publicId,
+    assumedRoleArnResourceType, backbeatLifecycleSessionName,
+} = constants;
 
 // whitelist buckets to allow public read on objects
-const publicReadBuckets = process.env.ALLOW_PUBLIC_READ_BUCKETS ?
+const publicReadBuckets = process.env.ALLOW_PUBLIC_READ_BUCKETS
-    process.env.ALLOW_PUBLIC_READ_BUCKETS.split(',') : [];
+    ? process.env.ALLOW_PUBLIC_READ_BUCKETS.split(',') : [];
 
-function checkBucketAcls(bucket, requestType, canonicalID) {
+function checkBucketAcls(bucket, requestType, canonicalID, mainApiCall) {
+    // Same logic applies on the Versioned APIs, so let's simplify it.
+    const requestTypeParsed = requestType.endsWith('Version')
+        ? requestType.slice(0, -7) : requestType;
     if (bucket.getOwner() === canonicalID) {
         return true;
     }
+    // Backward compatibility
+    const arrayOfAllowed = [
+        'objectPutTagging',
+        'objectPutLegalHold',
+        'objectPutRetention',
+    ];
+    if (mainApiCall === 'objectGet') {
+        if (requestTypeParsed === 'objectGetTagging') {
+            return true;
+        }
+    }
+    if (mainApiCall === 'objectPut') {
+        if (arrayOfAllowed.includes(requestTypeParsed)) {
+            return true;
+        }
+    }
 
     const bucketAcl = bucket.getAcl();
-    if (requestType === 'bucketGet' || requestType === 'bucketHead') {
+    if (requestTypeParsed === 'bucketGet' || requestTypeParsed === 'bucketHead') {
         if (bucketAcl.Canned === 'public-read'
             || bucketAcl.Canned === 'public-read-write'
             || (bucketAcl.Canned === 'authenticated-read'
@@ -32,7 +53,7 @@ function checkBucketAcls(bucket, requestType, canonicalID) {
             return true;
         }
     }
-    if (requestType === 'bucketGetACL') {
+    if (requestTypeParsed === 'bucketGetACL') {
         if ((bucketAcl.Canned === 'log-delivery-write'
             && canonicalID === logId)
             || bucketAcl.FULL_CONTROL.indexOf(canonicalID) > -1
@@ -48,7 +69,7 @@ function checkBucketAcls(bucket, requestType, canonicalID) {
         }
     }
 
-    if (requestType === 'bucketPutACL') {
+    if (requestTypeParsed === 'bucketPutACL') {
         if (bucketAcl.FULL_CONTROL.indexOf(canonicalID) > -1
             || bucketAcl.WRITE_ACP.indexOf(canonicalID) > -1) {
             return true;
@@ -62,11 +83,7 @@ function checkBucketAcls(bucket, requestType, canonicalID) {
         }
     }
 
-    if (requestType === 'bucketDelete' && bucket.getOwner() === canonicalID) {
+    if (requestTypeParsed === 'objectDelete' || requestTypeParsed === 'objectPut') {
-        return true;
-    }
-
-    if (requestType === 'objectDelete' || requestType === 'objectPut') {
         if (bucketAcl.Canned === 'public-read-write'
             || bucketAcl.FULL_CONTROL.indexOf(canonicalID) > -1
             || bucketAcl.WRITE.indexOf(canonicalID) > -1) {
@@ -86,11 +103,12 @@ function checkBucketAcls(bucket, requestType, canonicalID) {
     // objectPutACL, objectGetACL, objectHead or objectGet, the bucket
     // authorization check should just return true so can move on to check
     // rights at the object level.
-    return (requestType === 'objectPutACL' || requestType === 'objectGetACL' ||
+    return (requestTypeParsed === 'objectPutACL' || requestTypeParsed === 'objectGetACL'
-        requestType === 'objectGet' || requestType === 'objectHead');
+    || requestTypeParsed === 'objectGet' || requestTypeParsed === 'objectHead');
 }
 
-function checkObjectAcls(bucket, objectMD, requestType, canonicalID) {
+function checkObjectAcls(bucket, objectMD, requestType, canonicalID, requesterIsNotUser,
+    isUserUnauthenticated, mainApiCall) {
     const bucketOwner = bucket.getOwner();
     // acls don't distinguish between users and accounts, so both should be allowed
     if (bucketOwnerActions.includes(requestType)
@@ -100,6 +118,15 @@ function checkObjectAcls(bucket, objectMD, requestType, canonicalID) {
     if (objectMD['owner-id'] === canonicalID) {
         return true;
     }
+
+    // Backward compatibility
+    if (mainApiCall === 'objectGet') {
+        if ((isUserUnauthenticated || (requesterIsNotUser && bucketOwner === objectMD['owner-id']))
+            && requestType === 'objectGetTagging') {
+            return true;
+        }
+    }
+
     if (!objectMD.acl) {
         return false;
     }
@@ -169,9 +196,9 @@ function checkObjectAcls(bucket, objectMD, requestType, canonicalID) {
     // 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()) &&
+    const allowPublicReads = publicReadBuckets.includes(bucket.getName())
-        bucketAcl.Canned === 'public-read' &&
+        && bucketAcl.Canned === 'public-read'
-        (requestType === 'objectGet' || requestType === 'objectHead');
+        && (requestType === 'objectGet' || requestType === 'objectHead');
     if (allowPublicReads) {
         return true;
     }
@@ -268,75 +295,194 @@ function checkBucketPolicy(policy, requestType, canonicalID, arn, bucketOwner, l
     return permission;
 }
 
-function isBucketAuthorized(bucket, requestType, canonicalID, authInfo, log, request) {
+function isBucketAuthorized(bucket, requestTypes, canonicalID, authInfo, log, request, actionImplicitDenies) {
+    if (!Array.isArray(requestTypes)) {
+        // eslint-disable-next-line no-param-reassign
+        requestTypes = [requestTypes];
+    }
+    if (!actionImplicitDenies) {
+        // eslint-disable-next-line no-param-reassign
+        actionImplicitDenies = {};
+    }
+    // By default, all missing actions are defined as allowed from IAM, to be
+    // backward compatible
+    requestTypes.forEach(requestType => {
+        if (actionImplicitDenies[requestType] === undefined) {
+            // eslint-disable-next-line no-param-reassign
+            actionImplicitDenies[requestType] = false;
+        }
+    });
+    const mainApiCall = requestTypes[0];
+    const results = {};
+    requestTypes.forEach(_requestType => {
     // Check to see if user is authorized to perform a
     // particular action on bucket based on ACLs.
     // TODO: Add IAM checks
-    let requesterIsNotUser = true;
+        let requesterIsNotUser = true;
-    let arn = null;
+        let arn = null;
-    if (authInfo) {
+        if (authInfo) {
-        requesterIsNotUser = !authInfo.isRequesterAnIAMUser();
+            requesterIsNotUser = !authInfo.isRequesterAnIAMUser();
-        arn = authInfo.getArn();
+            arn = authInfo.getArn();
-    }
+        }
-    // if the bucket owner is an account, users should not have default access
+        // if the bucket owner is an account, users should not have default access
-    if ((bucket.getOwner() === canonicalID) && requesterIsNotUser) {
+        if ((bucket.getOwner() === canonicalID) && requesterIsNotUser) {
-        return true;
+            results[_requestType] = actionImplicitDenies[_requestType] === false;
-    }
+            return;
-    const aclPermission = checkBucketAcls(bucket, requestType, canonicalID);
+        }
-    const bucketPolicy = bucket.getBucketPolicy();
+        const aclPermission = checkBucketAcls(bucket, _requestType, canonicalID, mainApiCall);
-    if (!bucketPolicy) {
+        const bucketPolicy = bucket.getBucketPolicy();
-        return aclPermission;
+        if (!bucketPolicy) {
-    }
+            results[_requestType] = actionImplicitDenies[_requestType] === false && aclPermission;
-    const bucketPolicyPermission = checkBucketPolicy(bucketPolicy, requestType,
+            return;
-        canonicalID, arn, bucket.getOwner(), log, request);
+        }
-    if (bucketPolicyPermission === 'explicitDeny') {
+        const bucketPolicyPermission = checkBucketPolicy(bucketPolicy, _requestType,
-        return false;
+            canonicalID, arn, bucket.getOwner(), log, request);
-    }
+        if (bucketPolicyPermission === 'explicitDeny') {
-    return (aclPermission || (bucketPolicyPermission === 'allow'));
+            results[_requestType] = false;
+            return;
+        }
+        // If the bucket policy returns an allow, we accept the request, as the
+        // IAM response here is either Allow or implicit deny.
+        if (bucketPolicyPermission === 'allow') {
+            results[_requestType] = true;
+            return;
+        }
+        results[_requestType] = actionImplicitDenies[_requestType] === false && aclPermission;
+    });
+
+    // final result is true if all the results are true
+    return Object.keys(results).every(key => results[key] === true);
 }
 
-function isObjAuthorized(bucket, objectMD, requestType, canonicalID, authInfo, log, request) {
+function evaluateBucketPolicyWithIAM(bucket, requestTypes, canonicalID, authInfo, actionImplicitDenies, log, request) {
-    const bucketOwner = bucket.getOwner();
+    if (!Array.isArray(requestTypes)) {
-    if (!objectMD) {
+        // eslint-disable-next-line no-param-reassign
+        requestTypes = [requestTypes];
+    }
+    if (actionImplicitDenies === false) {
+        // eslint-disable-next-line no-param-reassign
+        actionImplicitDenies = {};
+    }
+    // By default, all missing actions are defined as allowed from IAM, to be
+    // backward compatible
+    requestTypes.forEach(requestType => {
+        if (actionImplicitDenies[requestType] === undefined) {
+            // eslint-disable-next-line no-param-reassign
+            actionImplicitDenies[requestType] = false;
+        }
+    });
+
+    const results = {};
+    requestTypes.forEach(_requestType => {
+        let arn = null;
+        if (authInfo) {
+            arn = authInfo.getArn();
+        }
+        const bucketPolicy = bucket.getBucketPolicy();
+        if (!bucketPolicy) {
+            results[_requestType] = actionImplicitDenies[_requestType] === false;
+            return;
+        }
+        const bucketPolicyPermission = checkBucketPolicy(bucketPolicy, _requestType,
+            canonicalID, arn, bucket.getOwner(), log, request);
+        if (bucketPolicyPermission === 'explicitDeny') {
+            results[_requestType] = false;
+            return;
+        }
+        // If the bucket policy returns an allow, we accept the request, as the
+        // IAM response here is either Allow or implicit deny.
+        if (bucketPolicyPermission === 'allow') {
+            results[_requestType] = true;
+            return;
+        }
+        results[_requestType] = actionImplicitDenies[_requestType] === false;
+    });
+
+    // final result is true if all the results are true
+    return Object.keys(results).every(key => results[key] === true);
+}
+
+function isObjAuthorized(bucket, objectMD, requestTypes, canonicalID, authInfo, log, request, actionImplicitDenies) {
+    if (!Array.isArray(requestTypes)) {
+        // eslint-disable-next-line no-param-reassign
+        requestTypes = [requestTypes];
+    }
+    // By default, all missing actions are defined as allowed from IAM, to be
+    // backward compatible
+    if (!actionImplicitDenies) {
+        // eslint-disable-next-line no-param-reassign
+        actionImplicitDenies = {};
+    }
+    requestTypes.forEach(requestType => {
+        if (actionImplicitDenies[requestType] === undefined) {
+            // eslint-disable-next-line no-param-reassign
+            actionImplicitDenies[requestType] = false;
+        }
+    });
+    const results = {};
+    const mainApiCall = requestTypes[0];
+    requestTypes.forEach(_requestType => {
+        const parsedMethodName = _requestType.endsWith('Version')
+            ? _requestType.slice(0, -7) : _requestType;
+        const bucketOwner = bucket.getOwner();
+        if (!objectMD) {
         // User is already authorized on the bucket for FULL_CONTROL or WRITE or
         // bucket has canned ACL public-read-write
-        if (requestType === 'objectPut' || requestType === 'objectDelete') {
+            if (parsedMethodName === 'objectPut' || parsedMethodName === 'objectDelete') {
-            return true;
+                results[_requestType] = actionImplicitDenies[_requestType] === false;
+                return;
+            }
+            // check bucket has read access
+            // 'bucketGet' covers listObjects and listMultipartUploads, bucket read actions
+            results[_requestType] = isBucketAuthorized(bucket, 'bucketGet', canonicalID, authInfo, log, request, false);
+            return;
         }
-        // check bucket has read access
+        let requesterIsNotUser = true;
-        // 'bucketGet' covers listObjects and listMultipartUploads, bucket read actions
+        let arn = null;
-        return isBucketAuthorized(bucket, 'bucketGet', canonicalID, authInfo, log, request);
+        let isUserUnauthenticated = false;
-    }
+        if (authInfo) {
-    let requesterIsNotUser = true;
+            requesterIsNotUser = !authInfo.isRequesterAnIAMUser();
-    let arn = null;
+            arn = authInfo.getArn();
-    if (authInfo) {
+            isUserUnauthenticated = arn === undefined;
-        requesterIsNotUser = !authInfo.isRequesterAnIAMUser();
+        }
-        arn = authInfo.getArn();
+        if (objectMD['owner-id'] === canonicalID && requesterIsNotUser) {
-    }
+            results[_requestType] = actionImplicitDenies[_requestType] === false;
-    if (objectMD['owner-id'] === canonicalID && requesterIsNotUser) {
+            return;
-        return true;
+        }
-    }
+        // account is authorized if:
-    // account is authorized if:
+        // - requesttype is included in bucketOwnerActions and
-    // - requesttype is included in bucketOwnerActions and
+        // - account is the bucket owner
-    // - account is the bucket owner
+        // - requester is account, not user
-    // - requester is account, not user
+        if (bucketOwnerActions.includes(parsedMethodName)
-    if (bucketOwnerActions.includes(requestType)
         && (bucketOwner === canonicalID)
         && requesterIsNotUser) {
-        return true;
+            results[_requestType] = actionImplicitDenies[_requestType] === false;
-    }
+            return;
-    const aclPermission = checkObjectAcls(bucket, objectMD, requestType,
+        }
-        canonicalID);
+        const aclPermission = checkObjectAcls(bucket, objectMD, parsedMethodName,
-    const bucketPolicy = bucket.getBucketPolicy();
+            canonicalID, requesterIsNotUser, isUserUnauthenticated, mainApiCall);
-    if (!bucketPolicy) {
+        const bucketPolicy = bucket.getBucketPolicy();
-        return aclPermission;
+        if (!bucketPolicy) {
-    }
+            results[_requestType] = actionImplicitDenies[_requestType] === false && aclPermission;
-    const bucketPolicyPermission = checkBucketPolicy(bucketPolicy, requestType,
+            return;
-        canonicalID, arn, bucket.getOwner(), log, request);
+        }
-    if (bucketPolicyPermission === 'explicitDeny') {
+        const bucketPolicyPermission = checkBucketPolicy(bucketPolicy, _requestType,
-        return false;
+            canonicalID, arn, bucket.getOwner(), log, request);
-    }
+        if (bucketPolicyPermission === 'explicitDeny') {
-    return (aclPermission || (bucketPolicyPermission === 'allow'));
+            results[_requestType] = false;
+            return;
+        }
+        // If the bucket policy returns an allow, we accept the request, as the
+        // IAM response here is either Allow or implicit deny.
+        if (bucketPolicyPermission === 'allow') {
+            results[_requestType] = true;
+            return;
+        }
+        results[_requestType] = actionImplicitDenies[_requestType] === false && aclPermission;
+    });
+
+    // final result is true if all the results are true
+    return Object.keys(results).every(key => results[key] === true);
 }
 
 function _checkResource(resource, bucketArn) {
@@ -383,9 +529,9 @@ function isLifecycleSession(arn) {
     const resourceType = resourceNames[0];
     const sessionName = resourceNames[resourceNames.length - 1];
 
-    return (service === 'sts' &&
+    return (service === 'sts'
-        resourceType === assumedRoleArnResourceType &&
+        && resourceType === assumedRoleArnResourceType
-        sessionName === backbeatLifecycleSessionName);
+        && sessionName === backbeatLifecycleSessionName);
 }
 
 module.exports = {
@@ -395,4 +541,6 @@ module.exports = {
     checkObjectAcls,
     validatePolicyResource,
     isLifecycleSession,
+    evaluateBucketPolicyWithIAM,
 };
+

package.json

@@ -20,7 +20,7 @@
   "homepage": "https://github.com/scality/S3#readme",
   "dependencies": {
     "@hapi/joi": "^17.1.0",
-    "arsenal": "git+https://github.com/scality/arsenal#7.10.47",
+    "arsenal": "git+https://github.com/scality/arsenal#df5ff0f4006ee0a21269e139567fd5c425a4225f",
     "async": "~2.5.0",
     "aws-sdk": "2.905.0",
     "azure-storage": "^2.1.0",

tests/unit/auth/permissionChecks.js

@@ -0,0 +1,236 @@
+const assert = require('assert');
+const { checkBucketAcls, checkObjectAcls } = require('../../../lib/api/apiUtils/authorization/permissionChecks');
+const constants = require('../../../constants');
+
+const { bucketOwnerActions } = constants;
+
+describe('checkBucketAcls', () => {
+    const mockBucket = {
+        getOwner: () => 'ownerId',
+        getAcl: () => ({
+            Canned: '',
+            FULL_CONTROL: [],
+            READ: [],
+            READ_ACP: [],
+            WRITE: [],
+            WRITE_ACP: [],
+        }),
+    };
+
+    const testScenarios = [
+        {
+            description: 'should return true if bucket owner matches canonicalID',
+            input: {
+                bucketAcl: {}, requestType: 'anyType', canonicalID: 'ownerId', mainApiCall: 'anyApiCall',
+            },
+            expected: true,
+        },
+        {
+            description: 'should return true for objectGetTagging when mainApiCall is objectGet',
+            input: {
+                bucketAcl: {}, requestType: 'objectGetTagging', canonicalID: 'anyId', mainApiCall: 'objectGet',
+            },
+            expected: true,
+        },
+        {
+            description: 'should return true for objectPutTagging when mainApiCall is objectPut',
+            input: {
+                bucketAcl: {}, requestType: 'objectPutTagging', canonicalID: 'anyId', mainApiCall: 'objectPut',
+            },
+            expected: true,
+        },
+        {
+            description: 'should return true for objectPutLegalHold when mainApiCall is objectPut',
+            input: {
+                bucketAcl: {}, requestType: 'objectPutLegalHold', canonicalID: 'anyId', mainApiCall: 'objectPut',
+            },
+            expected: true,
+        },
+        {
+            description: 'should return true for objectPutRetention when mainApiCall is objectPut',
+            input: {
+                bucketAcl: {}, requestType: 'objectPutRetention', canonicalID: 'anyId', mainApiCall: 'objectPut',
+            },
+            expected: true,
+        },
+        {
+            description: 'should return true for bucketGet if canned acl is public-read-write',
+            input: {
+                bucketAcl: { Canned: 'public-read-write' },
+                requestType: 'bucketGet',
+                canonicalID: 'anyId',
+                mainApiCall: 'anyApiCall',
+            },
+            expected: true,
+        },
+        {
+            description: 'should return true for bucketGet if canned acl is authenticated-read and id is not publicId',
+            input: {
+                bucketAcl: { Canned: 'authenticated-read' },
+                requestType: 'bucketGet',
+                canonicalID: 'anyIdNotPublic',
+                mainApiCall: 'anyApiCall',
+            },
+            expected: true,
+        },
+        {
+            description: 'should return true for bucketGet if canonicalID has FULL_CONTROL access',
+            input: {
+                bucketAcl: { FULL_CONTROL: ['anyId'], READ: [] },
+                requestType: 'bucketGet',
+                canonicalID: 'anyId',
+                mainApiCall: 'anyApiCall',
+            },
+            expected: true,
+        },
+        {
+            description: 'should return true for bucketGetACL if canonicalID has FULL_CONTROL',
+            input: {
+                bucketAcl: { FULL_CONTROL: ['anyId'], READ_ACP: [] },
+                requestType: 'bucketGetACL',
+                canonicalID: 'anyId',
+                mainApiCall: 'anyApiCall',
+            },
+            expected: true,
+        },
+        {
+            description: 'should return true for objectDelete if bucketAcl.Canned is public-read-write',
+            input: {
+                bucketAcl: { Canned: 'public-read-write' },
+                requestType: 'objectDelete',
+                canonicalID: 'anyId',
+                mainApiCall: 'anyApiCall',
+            },
+            expected: true,
+        },
+        {
+            description: 'should return true for requestType ending with "Version"',
+            input: {
+                bucketAcl: {},
+                requestType: 'objectGetVersion',
+                canonicalID: 'anyId',
+                mainApiCall: 'objectGet',
+            },
+            expected: true,
+        },
+        {
+            description: 'should return false for unmatched scenarios',
+            input: {
+                bucketAcl: {},
+                requestType: 'unmatchedRequest',
+                canonicalID: 'anyId',
+                mainApiCall: 'anyApiCall',
+            },
+            expected: false,
+        },
+    ];
+
+    testScenarios.forEach(scenario => {
+        it(scenario.description, () => {
+            // Mock the bucket based on the test scenario's input
+            mockBucket.getAcl = () => scenario.input.bucketAcl;
+
+            const result = checkBucketAcls(mockBucket,
+                scenario.input.requestType, scenario.input.canonicalID, scenario.input.mainApiCall);
+            assert.strictEqual(result, scenario.expected);
+        });
+    });
+});
+
+describe('checkObjectAcls', () => {
+    const mockBucket = {
+        getOwner: () => 'bucketOwnerId',
+        getName: () => 'bucketName',
+        getAcl: () => ({ Canned: '' }),
+    };
+    const mockObjectMD = {
+        'owner-id': 'objectOwnerId',
+        'acl': {
+            Canned: '',
+            FULL_CONTROL: [],
+            READ: [],
+            READ_ACP: [],
+            WRITE: [],
+            WRITE_ACP: [],
+        },
+    };
+
+    it('should return true if request type is in bucketOwnerActions and bucket owner matches canonicalID', () => {
+        assert.strictEqual(checkObjectAcls(mockBucket, mockObjectMD, bucketOwnerActions[0],
+            'bucketOwnerId', false, false, 'anyApiCall'), true);
+    });
+
+    it('should return true if objectMD owner matches canonicalID', () => {
+        assert.strictEqual(checkObjectAcls(mockBucket, mockObjectMD, 'anyType',
+            'objectOwnerId', false, false, 'anyApiCall'), true);
+    });
+
+    it('should return true for objectGetTagging when mainApiCall is objectGet and conditions met', () => {
+        assert.strictEqual(checkObjectAcls(mockBucket, mockObjectMD, 'objectGetTagging',
+            'anyIdNotPublic', true, true, 'objectGet'), true);
+    });
+
+    it('should return false if no acl provided in objectMD', () => {
+        const objMDWithoutAcl = Object.assign({}, mockObjectMD);
+        delete objMDWithoutAcl.acl;
+        assert.strictEqual(checkObjectAcls(mockBucket, objMDWithoutAcl, 'anyType',
+            'anyId', false, false, 'anyApiCall'), false);
+    });
+
+    const tests = [
+        {
+            acl: 'public-read', reqType: 'objectGet', id: 'anyIdNotPublic', expected: true,
+        },
+        {
+            acl: 'public-read-write', reqType: 'objectGet', id: 'anyIdNotPublic', expected: true,
+        },
+        {
+            acl: 'authenticated-read', reqType: 'objectGet', id: 'anyIdNotPublic', expected: true,
+        },
+        {
+            acl: 'bucket-owner-read', reqType: 'objectGet', id: 'bucketOwnerId', expected: true,
+        },
+        {
+            acl: 'bucket-owner-full-control', reqType: 'objectGet', id: 'bucketOwnerId', expected: true,
+        },
+        {
+            aclList: ['someId', 'anyIdNotPublic'],
+            aclField: 'FULL_CONTROL',
+            reqType: 'objectGet',
+            id: 'anyIdNotPublic',
+            expected: true,
+        },
+        {
+            aclList: ['someId', 'anyIdNotPublic'],
+            aclField: 'READ',
+            reqType: 'objectGet',
+            id: 'anyIdNotPublic',
+            expected: true,
+        },
+        { reqType: 'objectPut', id: 'anyId', expected: true },
+        { reqType: 'objectDelete', id: 'anyId', expected: true },
+        {
+            aclList: ['anyId'], aclField: 'FULL_CONTROL', reqType: 'objectPutACL', id: 'anyId', expected: true,
+        },
+        {
+            acl: '', reqType: 'objectGet', id: 'randomId', expected: false,
+        },
+    ];
+
+    tests.forEach(test => {
+        it(`should return ${test.expected} for ${test.reqType} with ACL as ${test.acl
+            || (`${test.aclField}:${JSON.stringify(test.aclList)}`)}`, () => {
+            if (test.acl) {
+                mockObjectMD.acl.Canned = test.acl;
+            } else if (test.aclList && test.aclField) {
+                mockObjectMD.acl[test.aclField] = test.aclList;
+            }
+
+            assert.strictEqual(
+                checkObjectAcls(mockBucket, mockObjectMD, test.reqType, test.id, false, false, 'anyApiCall'),
+                test.expected,
+            );
+        });
+    });
+});
+

yarn.lock

@@ -488,9 +488,9 @@ arraybuffer.slice@~0.0.7:
   optionalDependencies:
     ioctl "^2.0.2"
 
-"arsenal@git+https://github.com/scality/arsenal#7.10.47":
+"arsenal@git+https://github.com/scality/arsenal#df5ff0f4006ee0a21269e139567fd5c425a4225f":
-  version "7.10.47"
+  version "7.10.48"
-  resolved "git+https://github.com/scality/arsenal#3f24336b83581d121f52146b8003e0a68d9ce876"
+  resolved "git+https://github.com/scality/arsenal#df5ff0f4006ee0a21269e139567fd5c425a4225f"
   dependencies:
     "@types/async" "^3.2.12"
     "@types/utf8" "^3.0.1"
@@ -506,7 +506,7 @@ arraybuffer.slice@~0.0.7:
     bson "4.0.0"
     debug "~2.6.9"
     diskusage "^1.1.1"
-    fcntl "github:scality/node-fcntl#0.2.0"
+    fcntl "github:scality/node-fcntl#0.2.2"
     hdclient scality/hdclient#1.1.0
     https-proxy-agent "^2.2.0"
     ioredis "^4.28.5"
@@ -1918,6 +1918,14 @@ fast-levenshtein@~2.0.6:
     nan "^2.3.2"
     node-gyp "^8.0.0"
 
+"fcntl@github:scality/node-fcntl#0.2.2":
+  version "0.2.1"
+  resolved "https://codeload.github.com/scality/node-fcntl/tar.gz/b1335ca204c6265cedc50c26020c4d63aabe920e"
+  dependencies:
+    bindings "^1.1.1"
+    nan "^2.3.2"
+    node-gyp "^8.0.0"
+
 fecha@^4.2.0:
   version "4.2.3"
   resolved "https://registry.yarnpkg.com/fecha/-/fecha-4.2.3.tgz#4d9ccdbc61e8629b259fdca67e65891448d569fd"