### Create a private keyopenssl genrsa -out private_24MAR25_B.pem 2048### Extract the public key from the private keyopenssl rsa -pubout -in private_24MAR25_B.pem -out public_24MAR25_B.pem### Format the public key for the config.ini file -> paste in Arduino Create config.ini file and add a comment for file nameawk 'NR>0 {printf "%s\\n", $0}' public_24MAR25_B.pem

signatureKey='-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtHP52M8dCYDGaC4UaOvU\ncfLqhteGX75EnbXMr6iOg7r7Of+doFV+Ee233Ly/di15CXaju3EpgUka5QSu6z2m\n4sne32aGw6T/eggY636CKcRHFPFjLmXX0CHq+Evg3E4g8W7Yslo2qu1SP3ySZCqe\nVpZHSeehlxFPpQKWXa1YiNF0gWh3cNQ0wneOsJ+ndShSuQ5C2YnSEoeoiEGVFOS0\nevX4GEdadudGBjHQUKjhj+k3Ydaz014aIIC7CUVkQog9B7vpB+znHJH/gCl9DqYO\n4mjPfHG4c5ppNu455hEe75R5q9bPc7TjBA3jpZsdrBY05lX2Q2nAQgSYIHpf78xl\n7wIDAQAB\n-----END PUBLIC KEY-----\n'

import ("crypto""crypto/rand""crypto/rsa""crypto/sha256""crypto/x509""encoding/hex""encoding/pem""errors""fmt")func main() {key := `-----BEGIN PRIVATE KEY-----MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQC0c/nYzx0JgMZo<YOUR-REST-OF-PRIVATE-KEY>-----END PRIVATE KEY-----`res, err := sign([]byte("hello"), []byte(key))if err != nil {panic(err)}fmt.Println(string(res))}func sign(message []byte, key []byte) (string, error) {block, _ := pem.Decode(key)if block == nil {return "", errors.New("While decoding key " + string(key))}rng := rand.Readerprivate, err := x509.ParsePKCS8PrivateKey(block.Bytes)if err != nil {return "", errors.New("While parsing key " + err.Error())}hashed := sha256.Sum256(message)signature, err := rsa.SignPKCS1v15(rng, private.(*rsa.PrivateKey), crypto.SHA256, hashed[:])if err != nil {return "", errors.New("While signing message ")}return hex.EncodeToString(signature), nil}

response=$(curl -s -w " status code: %{http_code}" -X POST -H "Content-Type: application/json" -d '{   "commandline":"hello",   "port":"/dev/ttyACM1",   "board":"arduino:avr:leonardo",   "signature":"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",   "filename":"test"}' http://127.0.0.1:8991/upload)echo "Response: $response"

$ ./test.sh                                                                                                                                                  Response: signature is invalid status code: 400

signatureKey = `-----BEGIN PUBLIC KEY-----MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtHP52M8dCYDGaC4UaOvUcfLqhteGX75EnbXMr6iOg7r7Of+doFV+Ee233Ly/di15CXaju3EpgUka5QSu6z2m4sne32aGw6T/eggY636CKcRHFPFjLmXX0CHq+Evg3E4g8W7Yslo2qu1SP3ySZCqeVpZHSeehlxFPpQKWXa1YiNF0gWh3cNQ0wneOsJ+ndShSuQ5C2YnSEoeoiEGVFOS0evX4GEdadudGBjHQUKjhj+k3Ydaz014aIIC7CUVkQog9B7vpB+znHJH/gCl9DqYO4mjPfHG4c5ppNu455hEe75R5q9bPc7TjBA3jpZsdrBY05lX2Q2nAQgSYIHpf78xl7wIDAQAB-----END PUBLIC KEY-----`

Response:  status code: 202