74 lines
1.4 KiB
Go
74 lines
1.4 KiB
Go
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package main
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import (
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"bytes"
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"crypto/rand"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"golang.org/x/crypto/blake2s"
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"golang.org/x/crypto/chacha20poly1305"
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)
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type EnvironmentData struct {
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Temp float64 `json:"t" binding:"required"`
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Humidity float64 `json:"h" binding:"required"`
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}
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const passcode = "pass2"
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const salt = "ENVIRONMENT"
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func main() {
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data := EnvironmentData{Temp: 25, Humidity: 40}
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b, err := json.Marshal(data)
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if err != nil {
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panic(err)
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}
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pass, err := DeriveKey(passcode)
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if err != nil {
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panic(err)
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}
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aead, err := chacha20poly1305.New([]byte(pass))
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if err != nil {
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panic(err)
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}
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iv := make([]byte, chacha20poly1305.NonceSize)
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if _, err := io.ReadFull(rand.Reader, iv); err != nil {
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panic(err)
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}
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cypher := aead.Seal(nil, iv, b, nil)
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cypher = append(iv, cypher...)
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request, err := http.NewRequest(http.MethodPut, "http://localhost:8080/data/authed/7701238505945920037", bytes.NewReader(cypher))
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if err == nil {
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resp, err := http.DefaultClient.Do(request)
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if err != nil {
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panic(err)
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}
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defer resp.Body.Close()
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fmt.Printf("Sent, code: %s", resp.Status)
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} else {
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panic(err)
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}
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}
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func DeriveKey(passcode string) ([]byte, error) {
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hash, err := blake2s.New256(nil)
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if err != nil {
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return nil, err
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}
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hash.Write([]byte(salt))
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hash.Write([]byte(passcode))
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fmt.Printf("SALT %s PASS %s\n", salt, passcode)
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return hash.Sum(nil), nil
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}
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