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130 lines
2.6 KiB
130 lines
2.6 KiB
package main |
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import ( |
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"bytes" |
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"crypto/ed25519" |
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"encoding/hex" |
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"errors" |
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"fmt" |
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"io/ioutil" |
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"net/http" |
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"os" |
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"os/user" |
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"path/filepath" |
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"time" |
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) |
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func validKey() (ed25519.PublicKey, ed25519.PrivateKey) { |
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pub, priv, err := ed25519.GenerateKey(nil) |
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if err != nil { |
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panic(err) |
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} |
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// TODO: generate a new key if necessary |
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target, err := hex.DecodeString("ed2023") |
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if err != nil { |
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panic(err) |
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} |
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for bytes.Compare(pub[29:32], target) != 0 { |
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pub, priv, err = ed25519.GenerateKey(nil) |
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if err != nil { |
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panic(err) |
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} |
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} |
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fmt.Printf("%s\n", fmt.Sprintf("%x", pub)) |
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return pub, priv |
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} |
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func fileExists(name string) bool { |
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if _, err := os.Stat(name); errors.Is(err, os.ErrNotExist) { |
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return false |
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} |
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return true |
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} |
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func getKeys() (ed25519.PublicKey, ed25519.PrivateKey) { |
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user, err := user.Current() |
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if err != nil { |
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panic(err) |
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} |
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configPath := os.Getenv("XDG_CONFIG_HOME") |
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if configPath == "" { |
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configPath = filepath.Join(user.HomeDir, ".config", "spring83") |
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} |
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if err = os.MkdirAll(configPath, os.ModePerm); err != nil { |
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panic(err) |
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} |
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pubfile := filepath.Join(configPath, "key.pub") |
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privfile := filepath.Join(configPath, "key.priv") |
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var pubkey ed25519.PublicKey |
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var privkey ed25519.PrivateKey |
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if fileExists(pubfile) && fileExists(privfile) { |
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pubkey, err = ioutil.ReadFile(pubfile) |
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if err != nil { |
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panic(err) |
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} |
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privkey, err = ioutil.ReadFile(privfile) |
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if err != nil { |
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panic(err) |
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} |
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} else { |
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fmt.Printf("Generating key, give this a minute or two\n") |
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pubkey, privkey = validKey() |
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os.WriteFile(pubfile, pubkey, 0666) |
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os.WriteFile(privfile, privkey, 0600) |
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} |
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return pubkey, privkey |
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} |
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func main() { |
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pubkey, privkey := getKeys() |
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client := &http.Client{} |
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body, err := ioutil.ReadAll(os.Stdin) |
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if err != nil { |
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panic(err) |
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} |
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if len(body) == 0 { |
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panic(fmt.Errorf("input required")) |
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} |
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if len(body) > 2217 { |
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panic(fmt.Errorf("input body too long")) |
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} |
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// TODO: take the URL as a command line param |
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// set the HTTP method, url, and request body |
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url := fmt.Sprintf("http://localhost:8000/%x", pubkey) |
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fmt.Printf("URL: %s\n", url) |
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req, err := http.NewRequest(http.MethodPut, url, bytes.NewBuffer(body)) |
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if err != nil { |
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panic(err) |
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} |
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sig := ed25519.Sign(privkey, body) |
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fmt.Printf("Spring-83 Signature=%x\n", sig) |
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req.Header.Set("Authorization", fmt.Sprintf("Spring-83 Signature=%x", sig)) |
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dt := time.Now().Format(time.RFC1123) |
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req.Header.Set("If-Unmodified-Since", dt) |
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resp, err := client.Do(req) |
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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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responseBody, err := ioutil.ReadAll(resp.Body) |
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if err != nil { |
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panic(err) |
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} |
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fmt.Printf("%s: %s\n", resp.Status, responseBody) |
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}
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