1 files changed, 44 insertions, 0 deletions
diff --git a/bin/sign.sh b/bin/sign.sh
new file mode 100755
index 0000000..92fd207
--- /dev/null
+++ b/bin/sign.sh
@@ -0,0 +1,44 @@
+#!/bin/sh
+# Exit codes:
+# 0 - Success
+# 1 - Missing args
+# 2 - File not found
+
+set -e
+
+usage() {
+    echo "Usage: $(basename "$0") [-u KEY_ID] <file-to-sign>" >&2
+    echo "\t-u KEY_ID\tUse a specific GPG key to sign with (optional)" >&2
+    exit 1
+}
+
+USER_KEY=""
+
+while getopts ":u:" opt; do
+    case "$opt" in
+        u) USER_KEY="$OPTARG" ;;
+        *) usage ;;
+    esac
+done
+
+shift $((OPTIND - 1))
+
+if [ $# -ne 1 ]; then
+    echo "Error: Missing file to sign." >&2
+    usage
+fi
+
+FILE="$1"
+
+if [ ! -f "$FILE" ]; then
+    echo "Error: File '$FILE' not found." >&2
+    exit 2
+fi
+
+GPG_CMD="gpg --include-key-block --openpgp -b"
+
+if [ -n "$USER_KEY" ]; then
+    GPG_CMD="$GPG_CMD --local-user $USER_KEY"
+fi
+
+eval "$GPG_CMD \"$FILE\"" && echo "Signature created: ${FILE}.sig"