Module: SecureRandom

Relationships & Source Files
Defined in:	activesupport/lib/active_support/core_ext/securerandom.rb

Constant Summary

BASE36_ALPHABET =
# File 'activesupport/lib/active_support/core_ext/securerandom.rb', line 7
```
("0".."9").to_a + ("a".."z").to_a
```
BASE58_ALPHABET =
# File 'activesupport/lib/active_support/core_ext/securerandom.rb', line 6
```
("0".."9").to_a + ("A".."Z").to_a + ("a".."z").to_a - ["0", "O", "I", "l"]
```

Class Method Summary

.base36(n = 16)

base36 generates a random base36 string in lowercase.
.base58(n = 16)

base58 generates a random base58 string.

Class Method Details

.base36(n = 16)

base36 generates a random base36 string in lowercase.

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. This method can be used over .base58 if a deterministic case key is necessary.

The result will contain alphanumeric characters in lowercase.

p SecureRandom.base36 # => "4kugl2pdqmscqtje"
p SecureRandom.base36(24) # => "77tmhrhjfvfdwodq8w7ev2m7"

[ GitHub ]

# File 'activesupport/lib/active_support/core_ext/securerandom.rb', line 38


def self.base36(n = 16)
  SecureRandom.random_bytes(n).unpack("C*").map do |byte|
    idx = byte % 64
    idx = SecureRandom.random_number(36) if idx >= 36
    BASE36_ALPHABET[idx]
  end.join
end

.base58(n = 16)

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"

[ GitHub ]

# File 'activesupport/lib/active_support/core_ext/securerandom.rb', line 19


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