59 lines
2.0 KiB
Ruby
59 lines
2.0 KiB
Ruby
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require 'keepass/password/char_set'
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require 'keepass/password/generator'
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require 'keepass/password/version'
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module KeePass
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module Password
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# Returns a generated password.
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#
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# @param [String] pattern the pattern
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# @param [Hash] options the options
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# @option options [Boolean] :permute (true) whether or not to randomly permute generated passwords
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# @option options [Boolean] :remove_lookalikes (false) whether or not to remove lookalike characters
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# @option options [Hash] :charset_mapping (CharSet::DEFAULT_MAPPING) the KeePass character set ID mapping
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# @return [String] the new password
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# @raise [InvalidPatternError] if `pattern` is invalid
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def self.generate(pattern, options = {})
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Generator.new(pattern, options).generate
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end
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# Returns whether or not the pattern is valid.
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#
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# @param [String] pattern the pattern
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# @param [Hash] options the options
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# @option options [Boolean] :permute (true) whether or not to randomly permute generated passwords
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# @option options [Boolean] :remove_lookalikes (false) whether or not to remove lookalike characters
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# @option options [Hash] :charset_mapping (CharSet::DEFAULT_MAPPING) the KeePass character set ID mapping
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# @return [Boolean] whether or not the pattern is valid
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def self.validate_pattern(pattern, options = {})
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begin
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generate(pattern, options)
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true
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rescue InvalidPatternError
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false
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end
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end
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# Returns an entropy estimate of a password.
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#
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# @param [String] test the password to test
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# @see http://en.wikipedia.org/wiki/Password_strength
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def self.estimate_entropy(test)
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chars = 0
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chars += 26 if test =~ LOWERCASE_TEST_RE
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chars += 26 if test =~ UPPERCASE_TEST_RE
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chars += 10 if test =~ DIGITS_TEST_RE
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chars += CharSet::PRINTABLE_ASCII_SPECIAL.size if test =~ SPECIAL_TEST_RE
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if chars == 0
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0
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else
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(test.size * Math.log(chars) / Math.log(2)).to_i
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end
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end
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end
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end
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