Added some basic functionality for creating and loading private and public keys.

keys.go

@@ -0,0 +1,61 @@
+package easyssh
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"io"
+	"io/ioutil"
+	"os"
+
+	"golang.org/x/crypto/ssh"
+)
+
+// CreateKeyPairFiles is the equivalent of running 'ssh-keygen -t rsa"'
+func CreateKeyPairFiles(publicKeyPath, privateKeyPath string) error {
+
+	privateKeyFile, err := os.Create(privateKeyPath)
+	if err != nil {
+		return err
+	}
+	defer privateKeyFile.Close()
+
+	publicKeyFile, err := os.Create(publicKeyPath)
+	if err != nil {
+		return err
+	}
+	defer publicKeyFile.Close()
+
+	return CreateKeyPair(publicKeyFile, privateKeyFile)
+}
+
+// CreateKeyPair creates a new SSH Key Pair writing the formatted keys to the corresponding io.Writers
+func CreateKeyPair(publicKey, privateKey io.Writer) (err error) {
+	k, err := rsa.GenerateKey(rand.Reader, 1024)
+	if err != nil {
+		return err
+	}
+	privatePEM := &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(k)}
+	err = pem.Encode(privateKey, privatePEM)
+	if err != nil {
+		return err
+	}
+	public, err := ssh.NewPublicKey(&k.PublicKey)
+	if err != nil {
+		return err
+	}
+	_, err = publicKey.Write(ssh.MarshalAuthorizedKey(public))
+	return err
+}
+
+// LoadPrivateKey loads a file at the provided path and attempts to load it into an ssh.Signer that can be used for SSH servers
+func LoadPrivateKey(filePath string) (ssh.Signer, error) {
+
+	privateBytes, err := ioutil.ReadFile(filePath)
+	if err != nil {
+		return nil, err
+	}
+
+	return ssh.ParsePrivateKey(privateBytes)
+}