Lambda function written in Go for validating a JWT token signed with a KMS key. It uses the matelang/jwt-go-aws-kms library that provides an AWS KMS(Key Management Service) adapter to be used with the popular GoLang JWT library golang-jwt/jwt-go.
This Lambda can be used with AWS API Gateway as a Lambda authorizer for HTTP APIs.
The Lambda function needs an environment variable KMS_JWT_KEY_ID for the KMS key ID used to sign the JWT token.
To build the executable:
GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go buildCGO_ENABLED=0 is set for creating a stable binary package for standard C library (libc)