AES-GCM Decryptor

name	AES-GCM Decryptor
version	v2.0.0
GitHub	serial-data-decryptor
DockerHub	weevenetwork/serial-data-decryptor
authors	Shrikant Bhusalwad, Paul Gaiduk, Vadim Vygonets

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Table of Content

• AES-GCM Decryptor
  • Table of Content
  • Description
  • Module Variables
  • Module Testing
  • Dependencies
  • Input
  • Output

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Description

Weeve module that decrypts the cyphertext received from the previous module using AES-GCM algorithm and forwards the plaintext to the next module. For incoming and outgoing message format see Input and Output sections.

Module Variables

Weave module to receive serial data in JSON format from Ingress module and decrypt the cyphertext, then send the decrypted data to the next module.

Environment Variables	type	Description
MODULE_NAME	string	Name of the module
MODULE_TYPE	string	Type of the module (Input, Processing, Output)
LOG_LEVEL	string	Allowed log levels: DEBUG, INFO, WARNING, ERROR, CRITICAL. Refer to logging package documentation.
INGRESS_HOST	string	Host to which data will be received
INGRESS_PORT	string	Port to which data will be received
EGRESS_URLS	string	HTTP ReST endpoint for the next module
AES_KEY	string	AES key to decrypt cyphertext in base64 format

Module Testing

TBD

Dependencies

The following are module dependencies:

• github.com/sirupsen/logrus
• github.com/go-playground/validator/v10

Input

Input to this module is JSON body single object with fields iv and cyphertext. The iv field is the initialization vector in base64 format and the cyphertext field is the cyphertext in base64 format. For example:

{
    "iv": "jc/GHiyMZmDkj1FK",
    "cyphertext": "TlMGbx5LRKPAFHRcOVKvy9veapflEdXJo48PQ27u95HdcchyqgeQSzLFetmcT2EjswXITGIAjcVUVntIHPNGL8ZsIzGbdik3kdilZtq8ADyZsQ=="
}

Output

Output of this module is a JSON object with the original plaintext. In this case this is the decrypted plaintext of the cyphertext from above:

{
    "plaintext": "cyccnt 0059d6ac (+0007eb06), ocnt 0002ffcd, ent +038d, oh 378782µ"
}