![]() ![]() aws kms encrypt -key-id alias/demo -plaintext fileb://plaintext.txt -query CiphertextBlob -output text | base64 -d > encrypted.txtĮncrypted.txt plaintext.bin plaintext.txt To get only the encrypted content, we will need to query the CiphertextBlob field and store the content into a file call encrypted.txt. ![]() "EncryptionAlgorithm": "SYMMETRIC_DEFAULT" "CiphertextBlob": "AQICAHhafwr0R1gD87hzIMWvZg4iolG3wyPx5ACoDbngRFUo2QGfroeBVinLA9Hw5AWTpCkEAAAAmzCBmAYJKoZIhvcNAQcGoIGKMIGHAgEAMIGBBgkqhkiG9w0BBwEwHgYJYIZIAWUDBAEuMBEEDNucopAAyw7639WqLgIBEIBUWd1u6wj5Uogdzwp9YTunH1Gc+s93/SH63BOk/S9fGOPL4S3fViRBClxFyF6hYQsJtl1beg0It5aW/mFp7ldtD0kmn/wKizC59lue5TMCpAwljji5", aws kms encrypt -key-id alias/demo -plaintext fileb://plaintext.bin Once we pass in the key-id and the file to encrypt, it will return the Ciphertext Blob, key Id as well as the encryption algorithm that we are using. We need to pass in the key id (for this article, I’m using the key alias) and also the base64 file which we just converted. Once the plaintext base64 file is ready, than we can start to do the encryption using the KMS encrypt cli. $ base64 -i plaintext.txt -o plaintext.bin After create the file, we need to decode the file to base64 as the KMS encryption only accept the base64 as input. Select the user who you can use this key, this can be a IAM user or Role (incase you want your EC2 to assume the role to use they key)įirst create a text file which will use for the encryption purpose and write some content into the file. Select the user who you want to provide the key administration permission Provide the labels for your key, this alias may use for the identify the key in the script later on if you do not wish to use the long key-id. The symmetric encryption algorithm that AWS KMS uses is fast, efficient, and assures the confidentiality and authenticity of data.” - AWS Documentation “Use a symmetric CMK for most use cases that require encrypting and decrypting data. On the Advanced options, you may just leave it default to use the KMS provided key material to generate the key. Symmetric key is refer to using the same key for both encryption and decryption of data, this is suitable for most of the use case. Remember the KMS is a regional managed service, where the key created is limit to that specific region only, so make sure you select the right region, for my case, I’m using the ap-souteeast-1 region to create my key. To create the key, first login to the AWS KMS console page. This is only deal with the encryption at rest. In this article, I will share on how to create the encryption data key using the AWS KMS to encrypt the data and decrypt the data. You can use the customer master key to generate unlimited number of unique data keys. However, AWS does NOT store or manage Data Keys. There is a direct relationship between Data Key and a CMK. If you have large data to encrypt, then use Data Keys.ĭata Keys are generated from CMKs. AWS does not encrypt the gigabytes of data using CMK. However, CMK is only used to encrypt a small amount of data less than 4KBs. AWS KMS is integrated with many AWS services and it uses AWS CloudTrail to track the usage logs of the keys for audit and compliance needs.ĬMKs are created and managed by AWS KMS. KMS uses Hardware Security Modules (Physical devices, commonly known as HSM) to store CMKs. These encryption keys are called “ Customer Master Keys” or CMKs for short. NodeJS encryption: const AWS = require('aws-sdk') ĪWS.config.AWS KMS (Key Management Service) is the service that manages encryption keys on AWS. The libraries works fine when they decrypt their respective encrypted messages (NodeJS with NodeJs, and Java with Java), but they don't seem to work across (Java won't decrypt messages from NodeJS encryption). I'm trying to implement 2 libraries (one in NodeJS and one in Java) that use the AWS (KMS) SDK to encrypt/decrypt messages. ![]()
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