├── .gitignore ├── LICENSE ├── README.md ├── aws-policy-minimize └── examples │ ├── maxS3Perm.json │ └── testScriptS3 ├── bin ├── aws-mfa ├── aws-policy-minimize └── aws-s3-tree └── requirements.txt /.gitignore: -------------------------------------------------------------------------------- 1 | 2 | # Created by https://www.gitignore.io/api/vim,osx,linux,emacs,python,windows,sublimetext,visualstudiocode 3 | 4 | ### Emacs ### 5 | # -*- mode: gitignore; -*- 6 | *~ 7 | \#*\# 8 | /.emacs.desktop 9 | /.emacs.desktop.lock 10 | *.elc 11 | auto-save-list 12 | tramp 13 | .\#* 14 | 15 | # Org-mode 16 | .org-id-locations 17 | *_archive 18 | 19 | # flymake-mode 20 | *_flymake.* 21 | 22 | # eshell files 23 | /eshell/history 24 | /eshell/lastdir 25 | 26 | # elpa packages 27 | /elpa/ 28 | 29 | # reftex files 30 | *.rel 31 | 32 | # AUCTeX auto folder 33 | /auto/ 34 | 35 | # cask packages 36 | .cask/ 37 | dist/ 38 | 39 | # Flycheck 40 | flycheck_*.el 41 | 42 | # server auth directory 43 | /server/ 44 | 45 | # 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If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. 340 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ## Introduction 2 | 3 | A set of tools to simplify the usage of AWS 4 | 5 | ### Tools 6 | 7 | - `aws-mfa`: A tool to manage MFA session creation, allowing the settings to be saved to a 8 | configuration file and providing a set of commands to run to utilise the 9 | created session. 10 | - `aws-s3-tree`: A tool to query S3 buckets in a user-friendly way. 11 | 12 | - `aws-policy-minimize`: A tool to find a minimal AWS policy that will allow some actions. 13 | 14 | ## Getting started 15 | 16 | Install the dependencies: 17 | 18 | ``` 19 | pip3 install -r requirements.txt 20 | ``` 21 | 22 | Then run the commands directly from the `bin/` directory. 23 | 24 | 25 | 26 | #### aws-policy-minimize 27 | 28 | `aws-policy-minimize [options] -o ` 29 | 30 | 31 | This tool allows you to minimize an AWS policy. 32 | 33 | You need to supply `maxperm.json` containing a policy to minimize. aws-policy-minimize will 34 | subtract permissions until it finds a minimal subset. 35 | 36 | To use: 37 | * You need to first set up a policy attached to the things you want to test. This WILL BE OVERWRITTEN. 38 | * You also need a json file containing a policy that's known to work (IE, one that is very generous). 39 | This must enumerate everything explicitly, not use wildcards. 40 | * You also need a test script, which tries all the things you want the policy to allow. It must yield 41 | a return code of zero if it succeeeds, otherwise any other code. (DD libraries also allow a third 42 | 'invalid coniguration' code, but since we should aloways generate a syntactically correct policy, 43 | we don't use that). 44 | * If you need to use different AWS credentials for the test to the ones needed for uploading the 45 | policy, place these in AWS variables starting TEST_, eg TEST_AWS_ACCESS_KEY_ID. 46 | 47 | Limitations: 48 | 49 | 50 | Currently assumes the use of environment variables to pass in the AWS credentials, not any other mechanism. 51 | 52 | Relies on a timeout after uploading the policy. This seems to need to be 30secs, which 53 | makes the process a bit slow. As this is based on trial and error, it may turn out that 54 | it is not enough. If the results of the test are therefore inconsistent, we get an assertion 55 | failure from picire, which isn't very useful in producing a good error message. Indeed, 56 | error messages are not great yet anywhere. 57 | 58 | Always sets the policy version to be the default, so don't use it on a live policy that 59 | is being used for other things. 60 | 61 | The library (picire) we use for minimization seens to have a bug in that it sometimes restests 62 | a configuration which it already tried (it's supposed to cache answers, but apparently doesn't) 63 | 64 | It doesn't know about '*' so you need to specify all the individual actions/resources. 65 | 66 | -------------------------------------------------------------------------------- /aws-policy-minimize/examples/maxS3Perm.json: -------------------------------------------------------------------------------- 1 | { 2 | "Version": "2012-10-17", 3 | "Statement": [ 4 | { 5 | "Sid": "VisualEditor0", 6 | "Effect": "Allow", 7 | "Action": [ 8 | "s3:GetLifecycleConfiguration", 9 | "s3:ListBucketByTags", 10 | "s3:GetBucketTagging", 11 | "s3:GetInventoryConfiguration", 12 | "s3:DeleteObjectVersion", 13 | "s3:GetObjectVersionTagging", 14 | "s3:GetBucketLogging", 15 | "s3:ListBucketVersions", 16 | "s3:GetAccelerateConfiguration", 17 | "s3:ListBucket", 18 | "s3:GetBucketPolicy", 19 | "s3:GetEncryptionConfiguration", 20 | "s3:GetObjectAcl", 21 | "s3:GetObjectVersionTorrent", 22 | "s3:GetBucketRequestPayment", 23 | "s3:GetObjectVersionAcl", 24 | "s3:GetObjectTagging", 25 | "s3:GetMetricsConfiguration", 26 | "s3:DeleteObject", 27 | "s3:GetBucketPolicyStatus", 28 | "s3:GetBucketPublicAccessBlock", 29 | "s3:ListBucketMultipartUploads", 30 | "s3:GetBucketWebsite", 31 | "s3:GetBucketVersioning", 32 | "s3:GetBucketAcl", 33 | "s3:GetBucketNotification", 34 | "s3:GetReplicationConfiguration", 35 | "s3:ListMultipartUploadParts", 36 | "s3:GetObject", 37 | "s3:GetObjectTorrent", 38 | "s3:DescribeJob", 39 | "s3:GetBucketCORS", 40 | "s3:GetAnalyticsConfiguration", 41 | "s3:GetObjectVersionForReplication", 42 | "s3:GetBucketLocation", 43 | "s3:GetObjectVersion" 44 | ], 45 | "Resource": "arn:aws:s3:::sample-bucket-name" 46 | } 47 | ] 48 | } 49 | -------------------------------------------------------------------------------- /aws-policy-minimize/examples/testScriptS3: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python 2 | 3 | """ 4 | An example script to test aws-policy-minimize. It tries to list a bucket. 5 | """ 6 | 7 | import boto3 8 | 9 | testBucket = 'sample-bucket-name' 10 | 11 | s3 = boto3.resource('s3') 12 | bucket = s3.Bucket(testBucket) 13 | objects = [x for x in bucket.objects.all()] 14 | 15 | -------------------------------------------------------------------------------- /bin/aws-mfa: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | ''' 4 | A tool to manage MFA session creation, allowing the settings to be saved to a 5 | configuration file and providing a set of commands to run to utilise the 6 | created session. 7 | 8 | Can also assume a role. 9 | 10 | Usage: 11 | aws-mfa [--profile=] login [--duration=