From cac97aae6184f2f2af5ceeabeae7e2ced3481064 Mon Sep 17 00:00:00 2001
From: Rose Hogenson <rosehogenson@posteo.net>
Date: Fri, 10 Oct 2025 22:37:41 -0700
Subject: Initial commit

---
 dec/dec.go | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 dec/dec.go

(limited to 'dec')

diff --git a/dec/dec.go b/dec/dec.go
new file mode 100644
index 0000000..a35b759
--- /dev/null
+++ b/dec/dec.go
@@ -0,0 +1,49 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+
+	"golang.org/x/term"
+	"roseh.moe/cmd/sym/internal/sym"
+)
+
+var passwordFlag = flag.String("p", "", "use the specified password; if not provided, dec will prompt for a password")
+
+func dec() error {
+	args := flag.Args()
+	if len(args) == 0 && *passwordFlag == "" {
+		return fmt.Errorf("-p is required when reading from stdin")
+	}
+	var password string
+	if *passwordFlag != "" {
+		password = *passwordFlag
+	} else {
+		fmt.Fprint(os.Stderr, "Enter password: ")
+		pw, err := term.ReadPassword(int(os.Stdin.Fd()))
+		fmt.Fprintln(os.Stderr)
+		if err != nil {
+			return err
+		}
+		password = string(pw)
+	}
+	pwCache := make(sym.PasswordCache)
+	if len(args) == 0 {
+		return sym.Decrypt(os.Stdout, os.Stdin, password, pwCache)
+	}
+	for _, fileName := range args {
+		if err := sym.DecryptFile(fileName, password, pwCache); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func main() {
+	flag.Parse()
+	if err := dec(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
-- 
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