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package main
import (
"bufio"
"fmt"
"log"
"net"
"os"
"os/user"
"path"
"time"
"github.com/nsheridan/cashier/client"
"github.com/pkg/browser"
"github.com/spf13/pflag"
"golang.org/x/crypto/ssh"
"golang.org/x/crypto/ssh/agent"
)
var (
u, _ = user.Current()
cfg = pflag.String("config", path.Join(u.HomeDir, ".cashier.conf"), "Path to config file")
ca = pflag.String("ca", "http://localhost:10000", "CA server")
keysize = pflag.Int("key_size", 0, "Size of key to generate. Ignored for ed25519 keys. (default 2048 for rsa keys, 256 for ecdsa keys)")
validity = pflag.Duration("validity", time.Hour*24, "Key lifetime. May be overridden by the CA at signing time")
keytype = pflag.String("key_type", "", "Type of private key to generate - rsa, ecdsa or ed25519. (default \"rsa\")")
publicFilePrefix = pflag.String("key_file_prefix", "", "Prefix for filename for public key and cert (optional, no default)")
useGRPC = pflag.Bool("use_grpc", false, "Use grpc (experimental)")
)
func main() {
pflag.Parse()
log.SetPrefix("cashier: ")
log.SetFlags(0)
var err error
c, err := client.ReadConfig(*cfg)
if err != nil {
log.Printf("Error parsing config file: %v\n", err)
}
fmt.Printf("Your browser has been opened to visit %s\n", c.CA)
if err := browser.OpenURL(c.CA); err != nil {
fmt.Println("Error launching web browser. Go to the link in your web browser")
}
fmt.Println("Generating new key pair")
priv, pub, err := client.GenerateKey(client.KeyType(c.Keytype), client.KeySize(c.Keysize))
if err != nil {
log.Fatalln("Error generating key pair: ", err)
}
fmt.Print("Enter token: ")
var token string
fmt.Scanln(&token)
var message string
fmt.Print("Enter message: ")
scanner := bufio.NewScanner(os.Stdin)
if scanner.Scan() {
message = scanner.Text()
}
var cert *ssh.Certificate
if *useGRPC {
cert, err = client.RPCSign(pub, token, message, c)
} else {
cert, err = client.Sign(pub, token, message, c)
}
if err != nil {
log.Fatalln(err)
}
sock, err := net.Dial("unix", os.Getenv("SSH_AUTH_SOCK"))
if err != nil {
log.Fatalf("Error connecting to agent: %v\n", err)
}
defer sock.Close()
a := agent.NewClient(sock)
if err := client.InstallCert(a, cert, priv); err != nil {
log.Fatalln(err)
}
if err := client.SavePublicFiles(c.PublicFilePrefix, cert, pub); err != nil {
log.Fatalln(err)
}
if err := client.SavePrivateFiles(c.PublicFilePrefix, cert, priv); err != nil {
log.Fatalln(err)
}
fmt.Println("Credentials added.")
}
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