totp (Timed One Time Password) experiment in golang

• GetSecret - returns a SecretID and Secret
• Challenge - Takes SecretID and TOTP, returns OK if TOTP is correct

1. Requests SecretID and Secret
2. Computes TOTP based on the Secret and Timeblock
3. Sends Challenge request to server with SecretID and TOTP

protoc command:

protoc --go_out=. \
    --go_opt=paths=source_relative \
    --go-grpc_out=. \
    --go-grpc_opt=paths=source_relative \
    totp/totp.proto

start:

go run server/server.go
go run client/client.go