cmd/ethkey: add command to change key passphrase (#16516)

This change introduces 

    ethkey changepassphrase <keyfile>

to change the passphrase of a key file.

1 files changed, 24 insertions, 16 deletions

diff --git a/cmd/ethkey/utils.go b/cmd/ethkey/utils.go
index 0e563bf92..6f60ebaf1 100644
--- a/cmd/ethkey/utils.go
+++ b/cmd/ethkey/utils.go
@@ -28,26 +28,14 @@ import (
 	"gopkg.in/urfave/cli.v1"
 )
 
-// getPassPhrase obtains a passphrase given by the user.  It first checks the
-// --passphrase command line flag and ultimately prompts the user for a
-// passphrase.
-func getPassPhrase(ctx *cli.Context, confirmation bool) string {
-	// Look for the --passphrase flag.
-	passphraseFile := ctx.String(passphraseFlag.Name)
-	if passphraseFile != "" {
-		content, err := ioutil.ReadFile(passphraseFile)
-		if err != nil {
-			utils.Fatalf("Failed to read passphrase file '%s': %v",
-				passphraseFile, err)
-		}
-		return strings.TrimRight(string(content), "\r\n")
-	}
-
-	// Otherwise prompt the user for the passphrase.
+// promptPassphrase prompts the user for a passphrase.  Set confirmation to true
+// to require the user to confirm the passphrase.
+func promptPassphrase(confirmation bool) string {
 	passphrase, err := console.Stdin.PromptPassword("Passphrase: ")
 	if err != nil {
 		utils.Fatalf("Failed to read passphrase: %v", err)
 	}
+
 	if confirmation {
 		confirm, err := console.Stdin.PromptPassword("Repeat passphrase: ")
 		if err != nil {
@@ -57,9 +45,29 @@ func getPassPhrase(ctx *cli.Context, confirmation bool) string {
 			utils.Fatalf("Passphrases do not match")
 		}
 	}
+
 	return passphrase
 }
 
+// getPassphrase obtains a passphrase given by the user.  It first checks the
+// --passfile command line flag and ultimately prompts the user for a
+// passphrase.
+func getPassphrase(ctx *cli.Context) string {
+	// Look for the --passwordfile flag.
+	passphraseFile := ctx.String(passphraseFlag.Name)
+	if passphraseFile != "" {
+		content, err := ioutil.ReadFile(passphraseFile)
+		if err != nil {
+			utils.Fatalf("Failed to read passphrase file '%s': %v",
+				passphraseFile, err)
+		}
+		return strings.TrimRight(string(content), "\r\n")
+	}
+
+	// Otherwise prompt the user for the passphrase.
+	return promptPassphrase(false)
+}
+
 // signHash is a helper function that calculates a hash for the given message
 // that can be safely used to calculate a signature from.
 //