1 files changed, 55 insertions, 0 deletions
diff --git a/lib/leap_cli/util/secret.rb b/lib/leap_cli/util/secret.rb
new file mode 100644
index 00000000..749b9595
--- /dev/null
+++ b/lib/leap_cli/util/secret.rb
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+# encoding: utf-8
+#
+# A simple secret generator
+#
+# Uses OpenSSL random number generator instead of Ruby's rand function
+#
+autoload :OpenSSL, 'openssl'
+
+module LeapCli; module Util
+  class Secret
+    CHARS = (('A'..'Z').to_a + ('a'..'z').to_a + ('0'..'9').to_a) - "i1loO06G".split(//u)
+    HEX = (0..9).to_a + ('a'..'f').to_a
+
+    #
+    # generate a secret with with no ambiguous characters.
+    #
+    # +length+ is in chars
+    #
+    # Only alphanumerics are allowed, in order to make these passwords work
+    # for REST url calls and to allow you to easily copy and paste them.
+    #
+    def self.generate(length = 16)
+      seed
+      OpenSSL::Random.random_bytes(length).bytes.to_a.collect { |byte|
+        CHARS[ byte % CHARS.length ]
+      }.join
+    end
+
+    #
+    # generates a hex secret, instead of an alphanumeric on.
+    #
+    # length is in bits
+    #
+    def self.generate_hex(length = 128)
+      seed
+      OpenSSL::Random.random_bytes(length/4).bytes.to_a.collect { |byte|
+        HEX[ byte % HEX.length ]
+      }.join
+    end
+
+    private
+
+    def self.seed
+      @pid ||= 0
+      pid = $$
+      if @pid != pid
+        now = Time.now
+        ary = [now.to_i, now.nsec, @pid, pid]
+        OpenSSL::Random.seed(ary.to_s)
+        @pid = pid
+      end
+    end
+
+  end
+end; end