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Original file line number | Diff line number | Diff line change |
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module SecureRandom | ||
BASE58_ALPHABET = ('0'..'9').to_a + ('A'..'Z').to_a + ('a'..'z').to_a - ['0', 'O', 'I', 'l'] | ||
# SecureRandom.base58 generates a random base58 string. | ||
# | ||
# The argument _n_ specifies the length, of the random string to be generated. | ||
# | ||
# If _n_ is not specified or is nil, 16 is assumed. It may be larger in the future. | ||
# | ||
# The result may contain alphanumeric characters except 0, O, I and l | ||
# | ||
# p SecureRandom.base58 #=> "4kUgL2pdQMSCQtjE" | ||
# p SecureRandom.base58(24) #=> "77TMHrHJFvFDwodq8w7Ev2m7" | ||
# | ||
def self.base58(n = 16) | ||
SecureRandom.random_bytes(n).unpack("C*").map do |byte| | ||
idx = byte % 64 | ||
idx = SecureRandom.random_number(58) if idx >= 58 | ||
BASE58_ALPHABET[idx] | ||
end.join | ||
end | ||
end |
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require 'abstract_unit' | ||
require 'active_support/core_ext/securerandom' | ||
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class SecureRandomTest < ActiveSupport::TestCase | ||
def test_base58 | ||
s1 = SecureRandom.base58 | ||
s2 = SecureRandom.base58 | ||
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assert_not_equal s1, s2 | ||
assert_equal 16, s1.length | ||
end | ||
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def test_base58_with_length | ||
s1 = SecureRandom.base58(24) | ||
s2 = SecureRandom.base58(24) | ||
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assert_not_equal s1, s2 | ||
assert_equal 24, s1.length | ||
end | ||
end |