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-rw-r--r--main.go10
-rw-r--r--private_key.go5
-rw-r--r--public_key.go46
3 files changed, 58 insertions, 3 deletions
diff --git a/main.go b/main.go
index bbb7caa..8329d47 100644
--- a/main.go
+++ b/main.go
@@ -13,6 +13,7 @@ const (
TypeLabelRSA = "RSA PRIVATE KEY"
TypeLabelECDSA = "EC PRIVATE KEY"
TypeLabelCSR = "CERTIFICATE REQUEST"
+ TypeLabelPubKey = "PUBLIC KEY"
)
var (
@@ -24,11 +25,13 @@ func main() {
crash_with_help(1, "No module selected!")
}
switch os.Args[1] {
- case "create-private": create_private_key()
+ case "create-private": create_private_key()
case "create-cert-sign": create_sign_request()
+ case "create-public": create_public_key()
case "help": print_modules()
case "info": info_on_file()
- case "sign": sign_request()
+ case "sign-request": sign_request()
+ case "sign-input": sign_input()
default: crash_with_help(1, "Command not supported!")
}
}
@@ -37,6 +40,8 @@ func main() {
func info_on_file() {}
// sign a certificate request to create a new certificate
func sign_request() {}
+// sign a message with a private key
+func sign_input() {}
// open stream for given path
func open_output_stream(path string) (io.WriteCloser, error) {
@@ -57,6 +62,7 @@ func print_modules() {
fmt.Printf(`Usage: %s command args
where 'command' is one of:
create-private create a new private key
+ create-public create a public key from a private one
create-cert-sign create a new certificate sign request
help show this help
info get info on a file
diff --git a/private_key.go b/private_key.go
index ae5b90a..5e32ca8 100644
--- a/private_key.go
+++ b/private_key.go
@@ -1,6 +1,7 @@
package main
import (
+ "crypto"
"crypto/elliptic"
"crypto/ecdsa"
"crypto/rand"
@@ -15,7 +16,9 @@ import (
)
type (
- PrivateKey interface {}
+ PrivateKey interface {
+ Public() crypto.PublicKey
+ }
CreateFlags struct {
CryptType string // rsa or ecdsa
diff --git a/public_key.go b/public_key.go
new file mode 100644
index 0000000..fc1ea23
--- /dev/null
+++ b/public_key.go
@@ -0,0 +1,46 @@
+package main
+
+import (
+ "crypto/x509"
+ "encoding/pem"
+ "flag"
+ "fmt"
+ "io"
+ "os"
+)
+
+type (
+ PublicKeyFlags struct {
+ PrivateKeyPath string
+ Output string
+
+ output_stream io.WriteCloser // the actual stream to the output
+ }
+)
+
+func create_public_key() {
+ var err error
+ flags := parse_public_key_flags()
+ flags.output_stream, err = open_output_stream(flags.Output)
+ if err != nil {
+ crash_with_help(2, fmt.Sprintf("Error when creating file %s: %s", flags.Output, err))
+ }
+ priv_key := load_private_key(flags.PrivateKeyPath)
+ marshal, err := x509.MarshalPKIXPublicKey(priv_key.Public())
+ if err != nil {
+ crash_with_help(2, fmt.Sprintf("Problems marshalling the public key: %s", err))
+ }
+
+ block := &pem.Block{Type: TypeLabelPubKey, Bytes: marshal}
+ pem.Encode(flags.output_stream, block)
+}
+
+func parse_public_key_flags() PublicKeyFlags {
+ flags := PublicKeyFlags{}
+ fs := flag.NewFlagSet("create-public", flag.ExitOnError)
+ fs.StringVar(&flags.PrivateKeyPath, "private-key", "", "path to the private key file")
+ fs.StringVar(&flags.Output, "output", "STDOUT", "path where the generated csr should be stored")
+ fs.Parse(os.Args[2:])
+
+ return flags
+}