Module: Norn::SecretScrubber

Defined in:
lib/norn/secret_scrubber.rb

Class Method Summary collapse

Class Method Details

.register_secret(secret) ⇒ Object 



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# File 'lib/norn/secret_scrubber.rb', line 7

def self.register_secret(secret)
  return if secret.nil? || secret.strip.empty? || secret.length < 5
  @registered_secrets << secret.strip
end

.registered_secrets ⇒ Object 



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# File 'lib/norn/secret_scrubber.rb', line 12

def self.registered_secrets
  # Automatically discover and register environment keys on demand
  ["GEMINI_API_KEY", "OPENAI_API_KEY"].each do |var|
    val = ENV[var]
    register_secret(val) if val
  end

  @registered_secrets.to_a
end

.scrub(text) ⇒ Object 



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# File 'lib/norn/secret_scrubber.rb', line 22

def self.scrub(text)
  return text unless text.is_a?(String)

  scrubbed = text.dup

  # 1. Scavenge / discover keys from input text and cache them in memory
  scrubbed.scan(/(?:key=)["']?([^&\s"'`\r\n>#]+)/i) do |match|
    register_secret(match[0])
  end

  scrubbed.scan(/(sk-[a-zA-Z0-9_\-\.]{24,})/i) do |match|
    register_secret(match[0])
  end

  # 2. General-purpose pattern redactors
  scrubbed.gsub!(/(key=)[^&\s"'\r\n]+/i, '\1[REDACTED]')
  scrubbed.gsub!(/sk-[a-zA-Z0-9_\-\.]{24,}/i, 'sk-...[REDACTED]')
  scrubbed.gsub!(/(bearer\s+)[a-zA-Z0-9_\-\.]+/i, '\1[REDACTED]')
  scrubbed.gsub!(/("key"|:key|\bkey\b)\s*(=>|:)\s*["']([^"'\s]+)["']/i, '\1 \2 "[REDACTED]"')

  # 3. Memory lookup: Redact exact matches of all registered secrets
  registered_secrets.each do |secret|
    scrubbed.gsub!(secret, "[REDACTED]")
  end

  scrubbed
end