google-authenticator-libpam 1.05 (new formula)

Closes #19177.

Signed-off-by: ilovezfs <ilovezfs@icloud.com>

Formula/google-authenticator-libpam.rb

@@ -0,0 +1,38 @@
+class GoogleAuthenticatorLibpam < Formula
+  desc "PAM module for two-factor authentication"
+  homepage "https://github.com/google/google-authenticator-libpam"
+  url "https://github.com/google/google-authenticator-libpam/archive/1.05.tar.gz"
+  sha256 "862412d6927ee1a19d81150006d53c21935897ba6d033616c31fc4d6aaa4db08"
+
+  depends_on "autoconf" => :build
+  depends_on "automake" => :build
+  depends_on "libtool" => :build
+  depends_on "qrencode"
+
+  def install
+    system "./bootstrap.sh"
+    system "./configure", "--disable-dependency-tracking",
+                          "--disable-silent-rules",
+                          "--prefix=#{prefix}"
+    system "make", "install"
+  end
+
+  def caveats; <<~EOS
+    Add 2-factor authentication for ssh:
+      echo "auth required #{opt_lib}/security/pam_google_authenticator.so" \\
+      | sudo tee -a /etc/pam.d/sshd
+
+    Add 2-factor authentication for ssh allowing users to log in without OTP:
+      echo "auth required #{opt_lib}/security/pam_google_authenticator.so" \\
+      "nullok" | sudo tee -a /etc/pam.d/sshd
+
+    (Or just manually edit /etc/pam.d/sshd)
+    EOS
+  end
+
+  test do
+    system "#{bin}/google-authenticator", "--force", "--time-based",
+           "--disallow-reuse", "--rate-limit=3", "--rate-time=30",
+           "--window-size=3"
+  end
+end