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Diffstat (limited to 'ruby_1_9_3/lib/securerandom.rb')
| -rw-r--r-- | ruby_1_9_3/lib/securerandom.rb | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/ruby_1_9_3/lib/securerandom.rb b/ruby_1_9_3/lib/securerandom.rb deleted file mode 100644 index d4ab947f54..0000000000 --- a/ruby_1_9_3/lib/securerandom.rb +++ /dev/null @@ -1,265 +0,0 @@ -# = Secure random number generator interface. -# -# This library is an interface for secure random number generator which is -# suitable for generating session key in HTTP cookies, etc. -# -# It supports following secure random number generators. -# -# * openssl -# * /dev/urandom -# * Win32 -# -# == Example -# -# # random hexadecimal string. -# p SecureRandom.hex(10) #=> "52750b30ffbc7de3b362" -# p SecureRandom.hex(10) #=> "92b15d6c8dc4beb5f559" -# p SecureRandom.hex(11) #=> "6aca1b5c58e4863e6b81b8" -# p SecureRandom.hex(12) #=> "94b2fff3e7fd9b9c391a2306" -# p SecureRandom.hex(13) #=> "39b290146bea6ce975c37cfc23" -# ... -# -# # random base64 string. -# p SecureRandom.base64(10) #=> "EcmTPZwWRAozdA==" -# p SecureRandom.base64(10) #=> "9b0nsevdwNuM/w==" -# p SecureRandom.base64(10) #=> "KO1nIU+p9DKxGg==" -# p SecureRandom.base64(11) #=> "l7XEiFja+8EKEtY=" -# p SecureRandom.base64(12) #=> "7kJSM/MzBJI+75j8" -# p SecureRandom.base64(13) #=> "vKLJ0tXBHqQOuIcSIg==" -# ... -# -# # random binary string. -# p SecureRandom.random_bytes(10) #=> "\016\t{\370g\310pbr\301" -# p SecureRandom.random_bytes(10) #=> "\323U\030TO\234\357\020\a\337" -# ... - -begin - require 'openssl' -rescue LoadError -end - -module SecureRandom - # SecureRandom.random_bytes generates a random binary string. - # - # The argument _n_ specifies the length of the result string. - # - # If _n_ is not specified, 16 is assumed. - # It may be larger in future. - # - # The result may contain any byte: "\x00" - "\xff". - # - # p SecureRandom.random_bytes #=> "\xD8\\\xE0\xF4\r\xB2\xFC*WM\xFF\x83\x18\xF45\xB6" - # p SecureRandom.random_bytes #=> "m\xDC\xFC/\a\x00Uf\xB2\xB2P\xBD\xFF6S\x97" - # - # If secure random number generator is not available, - # NotImplementedError is raised. - def self.random_bytes(n=nil) - n = n ? n.to_int : 16 - - if defined? OpenSSL::Random - @pid = 0 if !defined?(@pid) - pid = $$ - if @pid != pid - now = Time.now - ary = [now.to_i, now.nsec, @pid, pid] - OpenSSL::Random.seed(ary.to_s) - @pid = pid - end - return OpenSSL::Random.random_bytes(n) - end - - if !defined?(@has_urandom) || @has_urandom - flags = File::RDONLY - flags |= File::NONBLOCK if defined? File::NONBLOCK - flags |= File::NOCTTY if defined? File::NOCTTY - begin - File.open("/dev/urandom", flags) {|f| - unless f.stat.chardev? - raise Errno::ENOENT - end - @has_urandom = true - ret = f.readpartial(n) - if ret.length != n - raise NotImplementedError, "Unexpected partial read from random device: only #{ret.length} for #{n} bytes" - end - return ret - } - rescue Errno::ENOENT - @has_urandom = false - end - end - - if !defined?(@has_win32) - begin - require 'Win32API' - - crypt_acquire_context = Win32API.new("advapi32", "CryptAcquireContext", 'PPPII', 'L') - @crypt_gen_random = Win32API.new("advapi32", "CryptGenRandom", 'LIP', 'L') - - hProvStr = " " * 4 - prov_rsa_full = 1 - crypt_verifycontext = 0xF0000000 - - if crypt_acquire_context.call(hProvStr, nil, nil, prov_rsa_full, crypt_verifycontext) == 0 - raise SystemCallError, "CryptAcquireContext failed: #{lastWin32ErrorMessage}" - end - @hProv, = hProvStr.unpack('L') - - @has_win32 = true - rescue LoadError - @has_win32 = false - end - end - if @has_win32 - bytes = " ".force_encoding("ASCII-8BIT") * n - if @crypt_gen_random.call(@hProv, bytes.size, bytes) == 0 - raise SystemCallError, "CryptGenRandom failed: #{lastWin32ErrorMessage}" - end - return bytes - end - - raise NotImplementedError, "No random device" - end - - # SecureRandom.hex generates a random hex string. - # - # The argument _n_ specifies the length of the random length. - # The length of the result string is twice of _n_. - # - # If _n_ is not specified, 16 is assumed. - # It may be larger in future. - # - # The result may contain 0-9 and a-f. - # - # p SecureRandom.hex #=> "eb693ec8252cd630102fd0d0fb7c3485" - # p SecureRandom.hex #=> "91dc3bfb4de5b11d029d376634589b61" - # - # If secure random number generator is not available, - # NotImplementedError is raised. - def self.hex(n=nil) - random_bytes(n).unpack("H*")[0] - end - - # SecureRandom.base64 generates a random base64 string. - # - # The argument _n_ specifies the length of the random length. - # The length of the result string is about 4/3 of _n_. - # - # If _n_ is not specified, 16 is assumed. - # It may be larger in future. - # - # The result may contain A-Z, a-z, 0-9, "+", "/" and "=". - # - # p SecureRandom.base64 #=> "/2BuBuLf3+WfSKyQbRcc/A==" - # p SecureRandom.base64 #=> "6BbW0pxO0YENxn38HMUbcQ==" - # - # If secure random number generator is not available, - # NotImplementedError is raised. - # - # See RFC 3548 for the definition of base64. - def self.base64(n=nil) - [random_bytes(n)].pack("m*").delete("\n") - end - - # SecureRandom.urlsafe_base64 generates a random URL-safe base64 string. - # - # The argument _n_ specifies the length of the random length. - # The length of the result string is about 4/3 of _n_. - # - # If _n_ is not specified, 16 is assumed. - # It may be larger in future. - # - # The boolean argument _padding_ specifies the padding. - # If it is false or nil, padding is not generated. - # Otherwise padding is generated. - # By default, padding is not generated because "=" may be used as a URL delimiter. - # - # The result may contain A-Z, a-z, 0-9, "-" and "_". - # "=" is also used if _padding_ is true. - # - # p SecureRandom.urlsafe_base64 #=> "b4GOKm4pOYU_-BOXcrUGDg" - # p SecureRandom.urlsafe_base64 #=> "UZLdOkzop70Ddx-IJR0ABg" - # - # p SecureRandom.urlsafe_base64(nil, true) #=> "i0XQ-7gglIsHGV2_BNPrdQ==" - # p SecureRandom.urlsafe_base64(nil, true) #=> "-M8rLhr7JEpJlqFGUMmOxg==" - # - # If secure random number generator is not available, - # NotImplementedError is raised. - # - # See RFC 3548 for the definition of URL-safe base64. - def self.urlsafe_base64(n=nil, padding=false) - s = [random_bytes(n)].pack("m*") - s.delete!("\n") - s.tr!("+/", "-_") - s.delete!("=") if !padding - s - end - - # SecureRandom.random_number generates a random number. - # - # If a positive integer is given as _n_, - # SecureRandom.random_number returns an integer: - # 0 <= SecureRandom.random_number(n) < n. - # - # p SecureRandom.random_number(100) #=> 15 - # p SecureRandom.random_number(100) #=> 88 - # - # If 0 is given or an argument is not given, - # SecureRandom.random_number returns a float: - # 0.0 <= SecureRandom.random_number() < 1.0. - # - # p SecureRandom.random_number #=> 0.596506046187744 - # p SecureRandom.random_number #=> 0.350621695741409 - # - def self.random_number(n=0) - if 0 < n - hex = n.to_s(16) - hex = '0' + hex if (hex.length & 1) == 1 - bin = [hex].pack("H*") - mask = bin[0].ord - mask |= mask >> 1 - mask |= mask >> 2 - mask |= mask >> 4 - begin - rnd = SecureRandom.random_bytes(bin.length) - rnd[0] = (rnd[0].ord & mask).chr - end until rnd < bin - rnd.unpack("H*")[0].hex - else - # assumption: Float::MANT_DIG <= 64 - i64 = SecureRandom.random_bytes(8).unpack("Q")[0] - Math.ldexp(i64 >> (64-Float::MANT_DIG), -Float::MANT_DIG) - end - end - - # SecureRandom.uuid generates a v4 random UUID (Universally Unique IDentifier). - # - # p SecureRandom.uuid #=> "2d931510-d99f-494a-8c67-87feb05e1594" - # p SecureRandom.uuid #=> "bad85eb9-0713-4da7-8d36-07a8e4b00eab" - # p SecureRandom.uuid #=> "62936e70-1815-439b-bf89-8492855a7e6b" - # - # The version 4 UUID is purely random (except the version). - # It doesn't contain meaningful information such as MAC address, time, etc. - # - # See RFC 4122 for details of UUID. - # - def self.uuid - ary = self.random_bytes(16).unpack("NnnnnN") - ary[2] = (ary[2] & 0x0fff) | 0x4000 - ary[3] = (ary[3] & 0x3fff) | 0x8000 - "%08x-%04x-%04x-%04x-%04x%08x" % ary - end - - # Following code is based on David Garamond's GUID library for Ruby. - def self.lastWin32ErrorMessage # :nodoc: - get_last_error = Win32API.new("kernel32", "GetLastError", '', 'L') - format_message = Win32API.new("kernel32", "FormatMessageA", 'LPLLPLPPPPPPPP', 'L') - format_message_ignore_inserts = 0x00000200 - format_message_from_system = 0x00001000 - - code = get_last_error.call - msg = "\0" * 1024 - len = format_message.call(format_message_ignore_inserts + format_message_from_system, 0, code, 0, msg, 1024, nil, nil, nil, nil, nil, nil, nil, nil) - msg[0, len].tr("\r", '').chomp - end -end |